1 | /* pngvcrd.c - mixed C/assembler version of utilities to read a PNG file |
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2 | * |
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3 | * For Intel x86 CPU and Microsoft Visual C++ compiler |
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4 | * |
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5 | * libpng version 1.2.5 - October 3, 2002 |
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6 | * For conditions of distribution and use, see copyright notice in png.h |
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7 | * Copyright (c) 1998-2002 Glenn Randers-Pehrson |
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8 | * Copyright (c) 1998, Intel Corporation |
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9 | * |
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10 | * Contributed by Nirav Chhatrapati, Intel Corporation, 1998 |
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11 | * Interface to libpng contributed by Gilles Vollant, 1999 |
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12 | * |
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13 | * |
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14 | * In png_do_read_interlace() in libpng versions 1.0.3a through 1.0.4d, |
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15 | * a sign error in the post-MMX cleanup code for each pixel_depth resulted |
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16 | * in bad pixels at the beginning of some rows of some images, and also |
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17 | * (due to out-of-range memory reads and writes) caused heap corruption |
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18 | * when compiled with MSVC 6.0. The error was fixed in version 1.0.4e. |
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19 | * |
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20 | * [png_read_filter_row_mmx_avg() bpp == 2 bugfix, GRR 20000916] |
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21 | * |
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22 | * [runtime MMX configuration, GRR 20010102] |
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23 | * |
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24 | */ |
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25 | |
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26 | #define PNG_INTERNAL |
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27 | #include "png.h" |
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28 | |
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29 | #if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && defined(PNG_USE_PNGVCRD) |
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30 | |
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31 | static int mmx_supported=2; |
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32 | |
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33 | |
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34 | int PNGAPI |
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35 | png_mmx_support(void) |
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36 | { |
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37 | int mmx_supported_local = 0; |
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38 | _asm { |
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39 | push ebx //CPUID will trash these |
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40 | push ecx |
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41 | push edx |
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42 | |
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43 | pushfd //Save Eflag to stack |
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44 | pop eax //Get Eflag from stack into eax |
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45 | mov ecx, eax //Make another copy of Eflag in ecx |
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46 | xor eax, 0x200000 //Toggle ID bit in Eflag [i.e. bit(21)] |
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47 | push eax //Save modified Eflag back to stack |
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48 | |
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49 | popfd //Restored modified value back to Eflag reg |
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50 | pushfd //Save Eflag to stack |
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51 | pop eax //Get Eflag from stack |
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52 | push ecx // save original Eflag to stack |
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53 | popfd // restore original Eflag |
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54 | xor eax, ecx //Compare the new Eflag with the original Eflag |
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55 | jz NOT_SUPPORTED //If the same, CPUID instruction is not supported, |
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56 | //skip following instructions and jump to |
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57 | //NOT_SUPPORTED label |
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58 | |
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59 | xor eax, eax //Set eax to zero |
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60 | |
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61 | _asm _emit 0x0f //CPUID instruction (two bytes opcode) |
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62 | _asm _emit 0xa2 |
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63 | |
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64 | cmp eax, 1 //make sure eax return non-zero value |
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65 | jl NOT_SUPPORTED //If eax is zero, mmx not supported |
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66 | |
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67 | xor eax, eax //set eax to zero |
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68 | inc eax //Now increment eax to 1. This instruction is |
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69 | //faster than the instruction "mov eax, 1" |
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70 | |
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71 | _asm _emit 0x0f //CPUID instruction |
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72 | _asm _emit 0xa2 |
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73 | |
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74 | and edx, 0x00800000 //mask out all bits but mmx bit(24) |
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75 | cmp edx, 0 // 0 = mmx not supported |
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76 | jz NOT_SUPPORTED // non-zero = Yes, mmx IS supported |
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77 | |
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78 | mov mmx_supported_local, 1 //set return value to 1 |
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79 | |
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80 | NOT_SUPPORTED: |
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81 | mov eax, mmx_supported_local //move return value to eax |
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82 | pop edx //CPUID trashed these |
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83 | pop ecx |
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84 | pop ebx |
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85 | } |
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86 | |
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87 | //mmx_supported_local=0; // test code for force don't support MMX |
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88 | //printf("MMX : %u (1=MMX supported)\n",mmx_supported_local); |
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89 | |
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90 | mmx_supported = mmx_supported_local; |
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91 | return mmx_supported_local; |
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92 | } |
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93 | |
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94 | /* Combines the row recently read in with the previous row. |
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95 | This routine takes care of alpha and transparency if requested. |
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96 | This routine also handles the two methods of progressive display |
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97 | of interlaced images, depending on the mask value. |
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98 | The mask value describes which pixels are to be combined with |
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99 | the row. The pattern always repeats every 8 pixels, so just 8 |
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100 | bits are needed. A one indicates the pixel is to be combined; a |
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101 | zero indicates the pixel is to be skipped. This is in addition |
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102 | to any alpha or transparency value associated with the pixel. If |
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103 | you want all pixels to be combined, pass 0xff (255) in mask. */ |
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104 | |
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105 | /* Use this routine for x86 platform - uses faster MMX routine if machine |
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106 | supports MMX */ |
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107 | |
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108 | void /* PRIVATE */ |
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109 | png_combine_row(png_structp png_ptr, png_bytep row, int mask) |
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110 | { |
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111 | #ifdef PNG_USE_LOCAL_ARRAYS |
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112 | const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; |
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113 | #endif |
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114 | |
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115 | png_debug(1,"in png_combine_row_asm\n"); |
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116 | |
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117 | if (mmx_supported == 2) { |
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118 | /* this should have happened in png_init_mmx_flags() already */ |
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119 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
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120 | png_mmx_support(); |
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121 | } |
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122 | |
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123 | if (mask == 0xff) |
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124 | { |
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125 | png_memcpy(row, png_ptr->row_buf + 1, |
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126 | (png_size_t)((png_ptr->width * png_ptr->row_info.pixel_depth + 7) >> 3)); |
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127 | } |
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128 | /* GRR: add "else if (mask == 0)" case? |
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129 | * or does png_combine_row() not even get called in that case? */ |
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130 | else |
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131 | { |
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132 | switch (png_ptr->row_info.pixel_depth) |
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133 | { |
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134 | case 1: |
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135 | { |
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136 | png_bytep sp; |
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137 | png_bytep dp; |
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138 | int s_inc, s_start, s_end; |
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139 | int m; |
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140 | int shift; |
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141 | png_uint_32 i; |
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142 | |
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143 | sp = png_ptr->row_buf + 1; |
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144 | dp = row; |
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145 | m = 0x80; |
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146 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
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147 | if (png_ptr->transformations & PNG_PACKSWAP) |
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148 | { |
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149 | s_start = 0; |
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150 | s_end = 7; |
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151 | s_inc = 1; |
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152 | } |
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153 | else |
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154 | #endif |
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155 | { |
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156 | s_start = 7; |
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157 | s_end = 0; |
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158 | s_inc = -1; |
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159 | } |
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160 | |
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161 | shift = s_start; |
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162 | |
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163 | for (i = 0; i < png_ptr->width; i++) |
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164 | { |
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165 | if (m & mask) |
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166 | { |
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167 | int value; |
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168 | |
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169 | value = (*sp >> shift) & 0x1; |
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170 | *dp &= (png_byte)((0x7f7f >> (7 - shift)) & 0xff); |
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171 | *dp |= (png_byte)(value << shift); |
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172 | } |
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173 | |
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174 | if (shift == s_end) |
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175 | { |
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176 | shift = s_start; |
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177 | sp++; |
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178 | dp++; |
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179 | } |
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180 | else |
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181 | shift += s_inc; |
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182 | |
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183 | if (m == 1) |
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184 | m = 0x80; |
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185 | else |
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186 | m >>= 1; |
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187 | } |
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188 | break; |
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189 | } |
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190 | |
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191 | case 2: |
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192 | { |
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193 | png_bytep sp; |
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194 | png_bytep dp; |
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195 | int s_start, s_end, s_inc; |
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196 | int m; |
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197 | int shift; |
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198 | png_uint_32 i; |
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199 | int value; |
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200 | |
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201 | sp = png_ptr->row_buf + 1; |
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202 | dp = row; |
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203 | m = 0x80; |
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204 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
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205 | if (png_ptr->transformations & PNG_PACKSWAP) |
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206 | { |
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207 | s_start = 0; |
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208 | s_end = 6; |
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209 | s_inc = 2; |
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210 | } |
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211 | else |
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212 | #endif |
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213 | { |
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214 | s_start = 6; |
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215 | s_end = 0; |
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216 | s_inc = -2; |
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217 | } |
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218 | |
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219 | shift = s_start; |
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220 | |
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221 | for (i = 0; i < png_ptr->width; i++) |
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222 | { |
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223 | if (m & mask) |
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224 | { |
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225 | value = (*sp >> shift) & 0x3; |
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226 | *dp &= (png_byte)((0x3f3f >> (6 - shift)) & 0xff); |
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227 | *dp |= (png_byte)(value << shift); |
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228 | } |
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229 | |
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230 | if (shift == s_end) |
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231 | { |
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232 | shift = s_start; |
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233 | sp++; |
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234 | dp++; |
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235 | } |
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236 | else |
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237 | shift += s_inc; |
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238 | if (m == 1) |
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239 | m = 0x80; |
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240 | else |
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241 | m >>= 1; |
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242 | } |
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243 | break; |
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244 | } |
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245 | |
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246 | case 4: |
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247 | { |
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248 | png_bytep sp; |
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249 | png_bytep dp; |
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250 | int s_start, s_end, s_inc; |
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251 | int m; |
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252 | int shift; |
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253 | png_uint_32 i; |
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254 | int value; |
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255 | |
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256 | sp = png_ptr->row_buf + 1; |
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257 | dp = row; |
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258 | m = 0x80; |
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259 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
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260 | if (png_ptr->transformations & PNG_PACKSWAP) |
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261 | { |
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262 | s_start = 0; |
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263 | s_end = 4; |
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264 | s_inc = 4; |
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265 | } |
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266 | else |
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267 | #endif |
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268 | { |
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269 | s_start = 4; |
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270 | s_end = 0; |
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271 | s_inc = -4; |
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272 | } |
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273 | shift = s_start; |
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274 | |
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275 | for (i = 0; i < png_ptr->width; i++) |
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276 | { |
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277 | if (m & mask) |
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278 | { |
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279 | value = (*sp >> shift) & 0xf; |
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280 | *dp &= (png_byte)((0xf0f >> (4 - shift)) & 0xff); |
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281 | *dp |= (png_byte)(value << shift); |
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282 | } |
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283 | |
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284 | if (shift == s_end) |
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285 | { |
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286 | shift = s_start; |
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287 | sp++; |
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288 | dp++; |
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289 | } |
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290 | else |
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291 | shift += s_inc; |
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292 | if (m == 1) |
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293 | m = 0x80; |
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294 | else |
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295 | m >>= 1; |
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296 | } |
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297 | break; |
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298 | } |
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299 | |
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300 | case 8: |
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301 | { |
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302 | png_bytep srcptr; |
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303 | png_bytep dstptr; |
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304 | png_uint_32 len; |
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305 | int m; |
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306 | int diff, unmask; |
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307 | |
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308 | __int64 mask0=0x0102040810204080; |
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309 | |
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310 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
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311 | /* && mmx_supported */ ) |
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312 | { |
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313 | srcptr = png_ptr->row_buf + 1; |
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314 | dstptr = row; |
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315 | m = 0x80; |
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316 | unmask = ~mask; |
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317 | len = png_ptr->width &~7; //reduce to multiple of 8 |
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318 | diff = png_ptr->width & 7; //amount lost |
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319 | |
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320 | _asm |
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321 | { |
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322 | movd mm7, unmask //load bit pattern |
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323 | psubb mm6,mm6 //zero mm6 |
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324 | punpcklbw mm7,mm7 |
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325 | punpcklwd mm7,mm7 |
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326 | punpckldq mm7,mm7 //fill register with 8 masks |
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327 | |
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328 | movq mm0,mask0 |
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329 | |
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330 | pand mm0,mm7 //nonzero if keep byte |
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331 | pcmpeqb mm0,mm6 //zeros->1s, v versa |
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332 | |
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333 | mov ecx,len //load length of line (pixels) |
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334 | mov esi,srcptr //load source |
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335 | mov ebx,dstptr //load dest |
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336 | cmp ecx,0 //lcr |
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337 | je mainloop8end |
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338 | |
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339 | mainloop8: |
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340 | movq mm4,[esi] |
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341 | pand mm4,mm0 |
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342 | movq mm6,mm0 |
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343 | pandn mm6,[ebx] |
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344 | por mm4,mm6 |
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345 | movq [ebx],mm4 |
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346 | |
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347 | add esi,8 //inc by 8 bytes processed |
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348 | add ebx,8 |
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349 | sub ecx,8 //dec by 8 pixels processed |
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350 | |
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351 | ja mainloop8 |
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352 | mainloop8end: |
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353 | |
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354 | mov ecx,diff |
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355 | cmp ecx,0 |
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356 | jz end8 |
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357 | |
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358 | mov edx,mask |
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359 | sal edx,24 //make low byte the high byte |
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360 | |
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361 | secondloop8: |
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362 | sal edx,1 //move high bit to CF |
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363 | jnc skip8 //if CF = 0 |
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364 | mov al,[esi] |
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365 | mov [ebx],al |
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366 | skip8: |
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367 | inc esi |
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368 | inc ebx |
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369 | |
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370 | dec ecx |
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371 | jnz secondloop8 |
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372 | end8: |
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373 | emms |
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374 | } |
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375 | } |
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376 | else /* mmx not supported - use modified C routine */ |
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377 | { |
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378 | register unsigned int incr1, initial_val, final_val; |
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379 | png_size_t pixel_bytes; |
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380 | png_uint_32 i; |
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381 | register int disp = png_pass_inc[png_ptr->pass]; |
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382 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
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383 | |
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384 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
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385 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
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386 | pixel_bytes; |
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387 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
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388 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
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389 | final_val = png_ptr->width*pixel_bytes; |
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390 | incr1 = (disp)*pixel_bytes; |
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391 | for (i = initial_val; i < final_val; i += incr1) |
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392 | { |
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393 | png_memcpy(dstptr, srcptr, pixel_bytes); |
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394 | srcptr += incr1; |
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395 | dstptr += incr1; |
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396 | } |
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397 | } /* end of else */ |
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398 | |
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399 | break; |
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400 | } // end 8 bpp |
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401 | |
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402 | case 16: |
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403 | { |
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404 | png_bytep srcptr; |
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405 | png_bytep dstptr; |
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406 | png_uint_32 len; |
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407 | int unmask, diff; |
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408 | __int64 mask1=0x0101020204040808, |
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409 | mask0=0x1010202040408080; |
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410 | |
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411 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
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412 | /* && mmx_supported */ ) |
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413 | { |
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414 | srcptr = png_ptr->row_buf + 1; |
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415 | dstptr = row; |
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416 | |
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417 | unmask = ~mask; |
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418 | len = (png_ptr->width)&~7; |
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419 | diff = (png_ptr->width)&7; |
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420 | _asm |
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421 | { |
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422 | movd mm7, unmask //load bit pattern |
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423 | psubb mm6,mm6 //zero mm6 |
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424 | punpcklbw mm7,mm7 |
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425 | punpcklwd mm7,mm7 |
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426 | punpckldq mm7,mm7 //fill register with 8 masks |
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427 | |
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428 | movq mm0,mask0 |
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429 | movq mm1,mask1 |
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430 | |
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431 | pand mm0,mm7 |
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432 | pand mm1,mm7 |
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433 | |
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434 | pcmpeqb mm0,mm6 |
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435 | pcmpeqb mm1,mm6 |
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436 | |
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437 | mov ecx,len //load length of line |
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438 | mov esi,srcptr //load source |
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439 | mov ebx,dstptr //load dest |
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440 | cmp ecx,0 //lcr |
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441 | jz mainloop16end |
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442 | |
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443 | mainloop16: |
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444 | movq mm4,[esi] |
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445 | pand mm4,mm0 |
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446 | movq mm6,mm0 |
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447 | movq mm7,[ebx] |
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448 | pandn mm6,mm7 |
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449 | por mm4,mm6 |
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450 | movq [ebx],mm4 |
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451 | |
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452 | movq mm5,[esi+8] |
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453 | pand mm5,mm1 |
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454 | movq mm7,mm1 |
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455 | movq mm6,[ebx+8] |
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456 | pandn mm7,mm6 |
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457 | por mm5,mm7 |
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458 | movq [ebx+8],mm5 |
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459 | |
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460 | add esi,16 //inc by 16 bytes processed |
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461 | add ebx,16 |
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462 | sub ecx,8 //dec by 8 pixels processed |
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463 | |
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464 | ja mainloop16 |
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465 | |
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466 | mainloop16end: |
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467 | mov ecx,diff |
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468 | cmp ecx,0 |
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469 | jz end16 |
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470 | |
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471 | mov edx,mask |
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472 | sal edx,24 //make low byte the high byte |
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473 | secondloop16: |
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474 | sal edx,1 //move high bit to CF |
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475 | jnc skip16 //if CF = 0 |
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476 | mov ax,[esi] |
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477 | mov [ebx],ax |
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478 | skip16: |
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479 | add esi,2 |
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480 | add ebx,2 |
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481 | |
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482 | dec ecx |
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483 | jnz secondloop16 |
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484 | end16: |
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485 | emms |
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486 | } |
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487 | } |
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488 | else /* mmx not supported - use modified C routine */ |
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489 | { |
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490 | register unsigned int incr1, initial_val, final_val; |
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491 | png_size_t pixel_bytes; |
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492 | png_uint_32 i; |
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493 | register int disp = png_pass_inc[png_ptr->pass]; |
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494 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
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495 | |
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496 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
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497 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
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498 | pixel_bytes; |
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499 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
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500 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
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501 | final_val = png_ptr->width*pixel_bytes; |
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502 | incr1 = (disp)*pixel_bytes; |
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503 | for (i = initial_val; i < final_val; i += incr1) |
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504 | { |
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505 | png_memcpy(dstptr, srcptr, pixel_bytes); |
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506 | srcptr += incr1; |
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507 | dstptr += incr1; |
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508 | } |
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509 | } /* end of else */ |
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510 | |
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511 | break; |
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512 | } // end 16 bpp |
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513 | |
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514 | case 24: |
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515 | { |
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516 | png_bytep srcptr; |
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517 | png_bytep dstptr; |
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518 | png_uint_32 len; |
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519 | int unmask, diff; |
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520 | |
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521 | __int64 mask2=0x0101010202020404, //24bpp |
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522 | mask1=0x0408080810101020, |
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523 | mask0=0x2020404040808080; |
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524 | |
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525 | srcptr = png_ptr->row_buf + 1; |
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526 | dstptr = row; |
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527 | |
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528 | unmask = ~mask; |
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529 | len = (png_ptr->width)&~7; |
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530 | diff = (png_ptr->width)&7; |
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531 | |
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532 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
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533 | /* && mmx_supported */ ) |
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534 | { |
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535 | _asm |
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536 | { |
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537 | movd mm7, unmask //load bit pattern |
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538 | psubb mm6,mm6 //zero mm6 |
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539 | punpcklbw mm7,mm7 |
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540 | punpcklwd mm7,mm7 |
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541 | punpckldq mm7,mm7 //fill register with 8 masks |
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542 | |
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543 | movq mm0,mask0 |
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544 | movq mm1,mask1 |
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545 | movq mm2,mask2 |
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546 | |
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547 | pand mm0,mm7 |
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548 | pand mm1,mm7 |
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549 | pand mm2,mm7 |
---|
550 | |
---|
551 | pcmpeqb mm0,mm6 |
---|
552 | pcmpeqb mm1,mm6 |
---|
553 | pcmpeqb mm2,mm6 |
---|
554 | |
---|
555 | mov ecx,len //load length of line |
---|
556 | mov esi,srcptr //load source |
---|
557 | mov ebx,dstptr //load dest |
---|
558 | cmp ecx,0 |
---|
559 | jz mainloop24end |
---|
560 | |
---|
561 | mainloop24: |
---|
562 | movq mm4,[esi] |
---|
563 | pand mm4,mm0 |
---|
564 | movq mm6,mm0 |
---|
565 | movq mm7,[ebx] |
---|
566 | pandn mm6,mm7 |
---|
567 | por mm4,mm6 |
---|
568 | movq [ebx],mm4 |
---|
569 | |
---|
570 | |
---|
571 | movq mm5,[esi+8] |
---|
572 | pand mm5,mm1 |
---|
573 | movq mm7,mm1 |
---|
574 | movq mm6,[ebx+8] |
---|
575 | pandn mm7,mm6 |
---|
576 | por mm5,mm7 |
---|
577 | movq [ebx+8],mm5 |
---|
578 | |
---|
579 | movq mm6,[esi+16] |
---|
580 | pand mm6,mm2 |
---|
581 | movq mm4,mm2 |
---|
582 | movq mm7,[ebx+16] |
---|
583 | pandn mm4,mm7 |
---|
584 | por mm6,mm4 |
---|
585 | movq [ebx+16],mm6 |
---|
586 | |
---|
587 | add esi,24 //inc by 24 bytes processed |
---|
588 | add ebx,24 |
---|
589 | sub ecx,8 //dec by 8 pixels processed |
---|
590 | |
---|
591 | ja mainloop24 |
---|
592 | |
---|
593 | mainloop24end: |
---|
594 | mov ecx,diff |
---|
595 | cmp ecx,0 |
---|
596 | jz end24 |
---|
597 | |
---|
598 | mov edx,mask |
---|
599 | sal edx,24 //make low byte the high byte |
---|
600 | secondloop24: |
---|
601 | sal edx,1 //move high bit to CF |
---|
602 | jnc skip24 //if CF = 0 |
---|
603 | mov ax,[esi] |
---|
604 | mov [ebx],ax |
---|
605 | xor eax,eax |
---|
606 | mov al,[esi+2] |
---|
607 | mov [ebx+2],al |
---|
608 | skip24: |
---|
609 | add esi,3 |
---|
610 | add ebx,3 |
---|
611 | |
---|
612 | dec ecx |
---|
613 | jnz secondloop24 |
---|
614 | |
---|
615 | end24: |
---|
616 | emms |
---|
617 | } |
---|
618 | } |
---|
619 | else /* mmx not supported - use modified C routine */ |
---|
620 | { |
---|
621 | register unsigned int incr1, initial_val, final_val; |
---|
622 | png_size_t pixel_bytes; |
---|
623 | png_uint_32 i; |
---|
624 | register int disp = png_pass_inc[png_ptr->pass]; |
---|
625 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
---|
626 | |
---|
627 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
---|
628 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
---|
629 | pixel_bytes; |
---|
630 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
---|
631 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
---|
632 | final_val = png_ptr->width*pixel_bytes; |
---|
633 | incr1 = (disp)*pixel_bytes; |
---|
634 | for (i = initial_val; i < final_val; i += incr1) |
---|
635 | { |
---|
636 | png_memcpy(dstptr, srcptr, pixel_bytes); |
---|
637 | srcptr += incr1; |
---|
638 | dstptr += incr1; |
---|
639 | } |
---|
640 | } /* end of else */ |
---|
641 | |
---|
642 | break; |
---|
643 | } // end 24 bpp |
---|
644 | |
---|
645 | case 32: |
---|
646 | { |
---|
647 | png_bytep srcptr; |
---|
648 | png_bytep dstptr; |
---|
649 | png_uint_32 len; |
---|
650 | int unmask, diff; |
---|
651 | |
---|
652 | __int64 mask3=0x0101010102020202, //32bpp |
---|
653 | mask2=0x0404040408080808, |
---|
654 | mask1=0x1010101020202020, |
---|
655 | mask0=0x4040404080808080; |
---|
656 | |
---|
657 | srcptr = png_ptr->row_buf + 1; |
---|
658 | dstptr = row; |
---|
659 | |
---|
660 | unmask = ~mask; |
---|
661 | len = (png_ptr->width)&~7; |
---|
662 | diff = (png_ptr->width)&7; |
---|
663 | |
---|
664 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
---|
665 | /* && mmx_supported */ ) |
---|
666 | { |
---|
667 | _asm |
---|
668 | { |
---|
669 | movd mm7, unmask //load bit pattern |
---|
670 | psubb mm6,mm6 //zero mm6 |
---|
671 | punpcklbw mm7,mm7 |
---|
672 | punpcklwd mm7,mm7 |
---|
673 | punpckldq mm7,mm7 //fill register with 8 masks |
---|
674 | |
---|
675 | movq mm0,mask0 |
---|
676 | movq mm1,mask1 |
---|
677 | movq mm2,mask2 |
---|
678 | movq mm3,mask3 |
---|
679 | |
---|
680 | pand mm0,mm7 |
---|
681 | pand mm1,mm7 |
---|
682 | pand mm2,mm7 |
---|
683 | pand mm3,mm7 |
---|
684 | |
---|
685 | pcmpeqb mm0,mm6 |
---|
686 | pcmpeqb mm1,mm6 |
---|
687 | pcmpeqb mm2,mm6 |
---|
688 | pcmpeqb mm3,mm6 |
---|
689 | |
---|
690 | mov ecx,len //load length of line |
---|
691 | mov esi,srcptr //load source |
---|
692 | mov ebx,dstptr //load dest |
---|
693 | |
---|
694 | cmp ecx,0 //lcr |
---|
695 | jz mainloop32end |
---|
696 | |
---|
697 | mainloop32: |
---|
698 | movq mm4,[esi] |
---|
699 | pand mm4,mm0 |
---|
700 | movq mm6,mm0 |
---|
701 | movq mm7,[ebx] |
---|
702 | pandn mm6,mm7 |
---|
703 | por mm4,mm6 |
---|
704 | movq [ebx],mm4 |
---|
705 | |
---|
706 | movq mm5,[esi+8] |
---|
707 | pand mm5,mm1 |
---|
708 | movq mm7,mm1 |
---|
709 | movq mm6,[ebx+8] |
---|
710 | pandn mm7,mm6 |
---|
711 | por mm5,mm7 |
---|
712 | movq [ebx+8],mm5 |
---|
713 | |
---|
714 | movq mm6,[esi+16] |
---|
715 | pand mm6,mm2 |
---|
716 | movq mm4,mm2 |
---|
717 | movq mm7,[ebx+16] |
---|
718 | pandn mm4,mm7 |
---|
719 | por mm6,mm4 |
---|
720 | movq [ebx+16],mm6 |
---|
721 | |
---|
722 | movq mm7,[esi+24] |
---|
723 | pand mm7,mm3 |
---|
724 | movq mm5,mm3 |
---|
725 | movq mm4,[ebx+24] |
---|
726 | pandn mm5,mm4 |
---|
727 | por mm7,mm5 |
---|
728 | movq [ebx+24],mm7 |
---|
729 | |
---|
730 | add esi,32 //inc by 32 bytes processed |
---|
731 | add ebx,32 |
---|
732 | sub ecx,8 //dec by 8 pixels processed |
---|
733 | |
---|
734 | ja mainloop32 |
---|
735 | |
---|
736 | mainloop32end: |
---|
737 | mov ecx,diff |
---|
738 | cmp ecx,0 |
---|
739 | jz end32 |
---|
740 | |
---|
741 | mov edx,mask |
---|
742 | sal edx,24 //make low byte the high byte |
---|
743 | secondloop32: |
---|
744 | sal edx,1 //move high bit to CF |
---|
745 | jnc skip32 //if CF = 0 |
---|
746 | mov eax,[esi] |
---|
747 | mov [ebx],eax |
---|
748 | skip32: |
---|
749 | add esi,4 |
---|
750 | add ebx,4 |
---|
751 | |
---|
752 | dec ecx |
---|
753 | jnz secondloop32 |
---|
754 | |
---|
755 | end32: |
---|
756 | emms |
---|
757 | } |
---|
758 | } |
---|
759 | else /* mmx _not supported - Use modified C routine */ |
---|
760 | { |
---|
761 | register unsigned int incr1, initial_val, final_val; |
---|
762 | png_size_t pixel_bytes; |
---|
763 | png_uint_32 i; |
---|
764 | register int disp = png_pass_inc[png_ptr->pass]; |
---|
765 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
---|
766 | |
---|
767 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
---|
768 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
---|
769 | pixel_bytes; |
---|
770 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
---|
771 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
---|
772 | final_val = png_ptr->width*pixel_bytes; |
---|
773 | incr1 = (disp)*pixel_bytes; |
---|
774 | for (i = initial_val; i < final_val; i += incr1) |
---|
775 | { |
---|
776 | png_memcpy(dstptr, srcptr, pixel_bytes); |
---|
777 | srcptr += incr1; |
---|
778 | dstptr += incr1; |
---|
779 | } |
---|
780 | } /* end of else */ |
---|
781 | |
---|
782 | break; |
---|
783 | } // end 32 bpp |
---|
784 | |
---|
785 | case 48: |
---|
786 | { |
---|
787 | png_bytep srcptr; |
---|
788 | png_bytep dstptr; |
---|
789 | png_uint_32 len; |
---|
790 | int unmask, diff; |
---|
791 | |
---|
792 | __int64 mask5=0x0101010101010202, |
---|
793 | mask4=0x0202020204040404, |
---|
794 | mask3=0x0404080808080808, |
---|
795 | mask2=0x1010101010102020, |
---|
796 | mask1=0x2020202040404040, |
---|
797 | mask0=0x4040808080808080; |
---|
798 | |
---|
799 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) |
---|
800 | /* && mmx_supported */ ) |
---|
801 | { |
---|
802 | srcptr = png_ptr->row_buf + 1; |
---|
803 | dstptr = row; |
---|
804 | |
---|
805 | unmask = ~mask; |
---|
806 | len = (png_ptr->width)&~7; |
---|
807 | diff = (png_ptr->width)&7; |
---|
808 | _asm |
---|
809 | { |
---|
810 | movd mm7, unmask //load bit pattern |
---|
811 | psubb mm6,mm6 //zero mm6 |
---|
812 | punpcklbw mm7,mm7 |
---|
813 | punpcklwd mm7,mm7 |
---|
814 | punpckldq mm7,mm7 //fill register with 8 masks |
---|
815 | |
---|
816 | movq mm0,mask0 |
---|
817 | movq mm1,mask1 |
---|
818 | movq mm2,mask2 |
---|
819 | movq mm3,mask3 |
---|
820 | movq mm4,mask4 |
---|
821 | movq mm5,mask5 |
---|
822 | |
---|
823 | pand mm0,mm7 |
---|
824 | pand mm1,mm7 |
---|
825 | pand mm2,mm7 |
---|
826 | pand mm3,mm7 |
---|
827 | pand mm4,mm7 |
---|
828 | pand mm5,mm7 |
---|
829 | |
---|
830 | pcmpeqb mm0,mm6 |
---|
831 | pcmpeqb mm1,mm6 |
---|
832 | pcmpeqb mm2,mm6 |
---|
833 | pcmpeqb mm3,mm6 |
---|
834 | pcmpeqb mm4,mm6 |
---|
835 | pcmpeqb mm5,mm6 |
---|
836 | |
---|
837 | mov ecx,len //load length of line |
---|
838 | mov esi,srcptr //load source |
---|
839 | mov ebx,dstptr //load dest |
---|
840 | |
---|
841 | cmp ecx,0 |
---|
842 | jz mainloop48end |
---|
843 | |
---|
844 | mainloop48: |
---|
845 | movq mm7,[esi] |
---|
846 | pand mm7,mm0 |
---|
847 | movq mm6,mm0 |
---|
848 | pandn mm6,[ebx] |
---|
849 | por mm7,mm6 |
---|
850 | movq [ebx],mm7 |
---|
851 | |
---|
852 | movq mm6,[esi+8] |
---|
853 | pand mm6,mm1 |
---|
854 | movq mm7,mm1 |
---|
855 | pandn mm7,[ebx+8] |
---|
856 | por mm6,mm7 |
---|
857 | movq [ebx+8],mm6 |
---|
858 | |
---|
859 | movq mm6,[esi+16] |
---|
860 | pand mm6,mm2 |
---|
861 | movq mm7,mm2 |
---|
862 | pandn mm7,[ebx+16] |
---|
863 | por mm6,mm7 |
---|
864 | movq [ebx+16],mm6 |
---|
865 | |
---|
866 | movq mm7,[esi+24] |
---|
867 | pand mm7,mm3 |
---|
868 | movq mm6,mm3 |
---|
869 | pandn mm6,[ebx+24] |
---|
870 | por mm7,mm6 |
---|
871 | movq [ebx+24],mm7 |
---|
872 | |
---|
873 | movq mm6,[esi+32] |
---|
874 | pand mm6,mm4 |
---|
875 | movq mm7,mm4 |
---|
876 | pandn mm7,[ebx+32] |
---|
877 | por mm6,mm7 |
---|
878 | movq [ebx+32],mm6 |
---|
879 | |
---|
880 | movq mm7,[esi+40] |
---|
881 | pand mm7,mm5 |
---|
882 | movq mm6,mm5 |
---|
883 | pandn mm6,[ebx+40] |
---|
884 | por mm7,mm6 |
---|
885 | movq [ebx+40],mm7 |
---|
886 | |
---|
887 | add esi,48 //inc by 32 bytes processed |
---|
888 | add ebx,48 |
---|
889 | sub ecx,8 //dec by 8 pixels processed |
---|
890 | |
---|
891 | ja mainloop48 |
---|
892 | mainloop48end: |
---|
893 | |
---|
894 | mov ecx,diff |
---|
895 | cmp ecx,0 |
---|
896 | jz end48 |
---|
897 | |
---|
898 | mov edx,mask |
---|
899 | sal edx,24 //make low byte the high byte |
---|
900 | |
---|
901 | secondloop48: |
---|
902 | sal edx,1 //move high bit to CF |
---|
903 | jnc skip48 //if CF = 0 |
---|
904 | mov eax,[esi] |
---|
905 | mov [ebx],eax |
---|
906 | skip48: |
---|
907 | add esi,4 |
---|
908 | add ebx,4 |
---|
909 | |
---|
910 | dec ecx |
---|
911 | jnz secondloop48 |
---|
912 | |
---|
913 | end48: |
---|
914 | emms |
---|
915 | } |
---|
916 | } |
---|
917 | else /* mmx _not supported - Use modified C routine */ |
---|
918 | { |
---|
919 | register unsigned int incr1, initial_val, final_val; |
---|
920 | png_size_t pixel_bytes; |
---|
921 | png_uint_32 i; |
---|
922 | register int disp = png_pass_inc[png_ptr->pass]; |
---|
923 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
---|
924 | |
---|
925 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
---|
926 | srcptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
---|
927 | pixel_bytes; |
---|
928 | dstptr = row + offset_table[png_ptr->pass]*pixel_bytes; |
---|
929 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
---|
930 | final_val = png_ptr->width*pixel_bytes; |
---|
931 | incr1 = (disp)*pixel_bytes; |
---|
932 | for (i = initial_val; i < final_val; i += incr1) |
---|
933 | { |
---|
934 | png_memcpy(dstptr, srcptr, pixel_bytes); |
---|
935 | srcptr += incr1; |
---|
936 | dstptr += incr1; |
---|
937 | } |
---|
938 | } /* end of else */ |
---|
939 | |
---|
940 | break; |
---|
941 | } // end 48 bpp |
---|
942 | |
---|
943 | default: |
---|
944 | { |
---|
945 | png_bytep sptr; |
---|
946 | png_bytep dp; |
---|
947 | png_size_t pixel_bytes; |
---|
948 | int offset_table[7] = {0, 4, 0, 2, 0, 1, 0}; |
---|
949 | unsigned int i; |
---|
950 | register int disp = png_pass_inc[png_ptr->pass]; // get the offset |
---|
951 | register unsigned int incr1, initial_val, final_val; |
---|
952 | |
---|
953 | pixel_bytes = (png_ptr->row_info.pixel_depth >> 3); |
---|
954 | sptr = png_ptr->row_buf + 1 + offset_table[png_ptr->pass]* |
---|
955 | pixel_bytes; |
---|
956 | dp = row + offset_table[png_ptr->pass]*pixel_bytes; |
---|
957 | initial_val = offset_table[png_ptr->pass]*pixel_bytes; |
---|
958 | final_val = png_ptr->width*pixel_bytes; |
---|
959 | incr1 = (disp)*pixel_bytes; |
---|
960 | for (i = initial_val; i < final_val; i += incr1) |
---|
961 | { |
---|
962 | png_memcpy(dp, sptr, pixel_bytes); |
---|
963 | sptr += incr1; |
---|
964 | dp += incr1; |
---|
965 | } |
---|
966 | break; |
---|
967 | } |
---|
968 | } /* end switch (png_ptr->row_info.pixel_depth) */ |
---|
969 | } /* end if (non-trivial mask) */ |
---|
970 | |
---|
971 | } /* end png_combine_row() */ |
---|
972 | |
---|
973 | |
---|
974 | #if defined(PNG_READ_INTERLACING_SUPPORTED) |
---|
975 | |
---|
976 | void /* PRIVATE */ |
---|
977 | png_do_read_interlace(png_structp png_ptr) |
---|
978 | { |
---|
979 | png_row_infop row_info = &(png_ptr->row_info); |
---|
980 | png_bytep row = png_ptr->row_buf + 1; |
---|
981 | int pass = png_ptr->pass; |
---|
982 | png_uint_32 transformations = png_ptr->transformations; |
---|
983 | #ifdef PNG_USE_LOCAL_ARRAYS |
---|
984 | const int png_pass_inc[7] = {8, 8, 4, 4, 2, 2, 1}; |
---|
985 | #endif |
---|
986 | |
---|
987 | png_debug(1,"in png_do_read_interlace\n"); |
---|
988 | |
---|
989 | if (mmx_supported == 2) { |
---|
990 | /* this should have happened in png_init_mmx_flags() already */ |
---|
991 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
---|
992 | png_mmx_support(); |
---|
993 | } |
---|
994 | |
---|
995 | if (row != NULL && row_info != NULL) |
---|
996 | { |
---|
997 | png_uint_32 final_width; |
---|
998 | |
---|
999 | final_width = row_info->width * png_pass_inc[pass]; |
---|
1000 | |
---|
1001 | switch (row_info->pixel_depth) |
---|
1002 | { |
---|
1003 | case 1: |
---|
1004 | { |
---|
1005 | png_bytep sp, dp; |
---|
1006 | int sshift, dshift; |
---|
1007 | int s_start, s_end, s_inc; |
---|
1008 | png_byte v; |
---|
1009 | png_uint_32 i; |
---|
1010 | int j; |
---|
1011 | |
---|
1012 | sp = row + (png_size_t)((row_info->width - 1) >> 3); |
---|
1013 | dp = row + (png_size_t)((final_width - 1) >> 3); |
---|
1014 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
---|
1015 | if (transformations & PNG_PACKSWAP) |
---|
1016 | { |
---|
1017 | sshift = (int)((row_info->width + 7) & 7); |
---|
1018 | dshift = (int)((final_width + 7) & 7); |
---|
1019 | s_start = 7; |
---|
1020 | s_end = 0; |
---|
1021 | s_inc = -1; |
---|
1022 | } |
---|
1023 | else |
---|
1024 | #endif |
---|
1025 | { |
---|
1026 | sshift = 7 - (int)((row_info->width + 7) & 7); |
---|
1027 | dshift = 7 - (int)((final_width + 7) & 7); |
---|
1028 | s_start = 0; |
---|
1029 | s_end = 7; |
---|
1030 | s_inc = 1; |
---|
1031 | } |
---|
1032 | |
---|
1033 | for (i = row_info->width; i; i--) |
---|
1034 | { |
---|
1035 | v = (png_byte)((*sp >> sshift) & 0x1); |
---|
1036 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1037 | { |
---|
1038 | *dp &= (png_byte)((0x7f7f >> (7 - dshift)) & 0xff); |
---|
1039 | *dp |= (png_byte)(v << dshift); |
---|
1040 | if (dshift == s_end) |
---|
1041 | { |
---|
1042 | dshift = s_start; |
---|
1043 | dp--; |
---|
1044 | } |
---|
1045 | else |
---|
1046 | dshift += s_inc; |
---|
1047 | } |
---|
1048 | if (sshift == s_end) |
---|
1049 | { |
---|
1050 | sshift = s_start; |
---|
1051 | sp--; |
---|
1052 | } |
---|
1053 | else |
---|
1054 | sshift += s_inc; |
---|
1055 | } |
---|
1056 | break; |
---|
1057 | } |
---|
1058 | |
---|
1059 | case 2: |
---|
1060 | { |
---|
1061 | png_bytep sp, dp; |
---|
1062 | int sshift, dshift; |
---|
1063 | int s_start, s_end, s_inc; |
---|
1064 | png_uint_32 i; |
---|
1065 | |
---|
1066 | sp = row + (png_size_t)((row_info->width - 1) >> 2); |
---|
1067 | dp = row + (png_size_t)((final_width - 1) >> 2); |
---|
1068 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
---|
1069 | if (transformations & PNG_PACKSWAP) |
---|
1070 | { |
---|
1071 | sshift = (png_size_t)(((row_info->width + 3) & 3) << 1); |
---|
1072 | dshift = (png_size_t)(((final_width + 3) & 3) << 1); |
---|
1073 | s_start = 6; |
---|
1074 | s_end = 0; |
---|
1075 | s_inc = -2; |
---|
1076 | } |
---|
1077 | else |
---|
1078 | #endif |
---|
1079 | { |
---|
1080 | sshift = (png_size_t)((3 - ((row_info->width + 3) & 3)) << 1); |
---|
1081 | dshift = (png_size_t)((3 - ((final_width + 3) & 3)) << 1); |
---|
1082 | s_start = 0; |
---|
1083 | s_end = 6; |
---|
1084 | s_inc = 2; |
---|
1085 | } |
---|
1086 | |
---|
1087 | for (i = row_info->width; i; i--) |
---|
1088 | { |
---|
1089 | png_byte v; |
---|
1090 | int j; |
---|
1091 | |
---|
1092 | v = (png_byte)((*sp >> sshift) & 0x3); |
---|
1093 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1094 | { |
---|
1095 | *dp &= (png_byte)((0x3f3f >> (6 - dshift)) & 0xff); |
---|
1096 | *dp |= (png_byte)(v << dshift); |
---|
1097 | if (dshift == s_end) |
---|
1098 | { |
---|
1099 | dshift = s_start; |
---|
1100 | dp--; |
---|
1101 | } |
---|
1102 | else |
---|
1103 | dshift += s_inc; |
---|
1104 | } |
---|
1105 | if (sshift == s_end) |
---|
1106 | { |
---|
1107 | sshift = s_start; |
---|
1108 | sp--; |
---|
1109 | } |
---|
1110 | else |
---|
1111 | sshift += s_inc; |
---|
1112 | } |
---|
1113 | break; |
---|
1114 | } |
---|
1115 | |
---|
1116 | case 4: |
---|
1117 | { |
---|
1118 | png_bytep sp, dp; |
---|
1119 | int sshift, dshift; |
---|
1120 | int s_start, s_end, s_inc; |
---|
1121 | png_uint_32 i; |
---|
1122 | |
---|
1123 | sp = row + (png_size_t)((row_info->width - 1) >> 1); |
---|
1124 | dp = row + (png_size_t)((final_width - 1) >> 1); |
---|
1125 | #if defined(PNG_READ_PACKSWAP_SUPPORTED) |
---|
1126 | if (transformations & PNG_PACKSWAP) |
---|
1127 | { |
---|
1128 | sshift = (png_size_t)(((row_info->width + 1) & 1) << 2); |
---|
1129 | dshift = (png_size_t)(((final_width + 1) & 1) << 2); |
---|
1130 | s_start = 4; |
---|
1131 | s_end = 0; |
---|
1132 | s_inc = -4; |
---|
1133 | } |
---|
1134 | else |
---|
1135 | #endif |
---|
1136 | { |
---|
1137 | sshift = (png_size_t)((1 - ((row_info->width + 1) & 1)) << 2); |
---|
1138 | dshift = (png_size_t)((1 - ((final_width + 1) & 1)) << 2); |
---|
1139 | s_start = 0; |
---|
1140 | s_end = 4; |
---|
1141 | s_inc = 4; |
---|
1142 | } |
---|
1143 | |
---|
1144 | for (i = row_info->width; i; i--) |
---|
1145 | { |
---|
1146 | png_byte v; |
---|
1147 | int j; |
---|
1148 | |
---|
1149 | v = (png_byte)((*sp >> sshift) & 0xf); |
---|
1150 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1151 | { |
---|
1152 | *dp &= (png_byte)((0xf0f >> (4 - dshift)) & 0xff); |
---|
1153 | *dp |= (png_byte)(v << dshift); |
---|
1154 | if (dshift == s_end) |
---|
1155 | { |
---|
1156 | dshift = s_start; |
---|
1157 | dp--; |
---|
1158 | } |
---|
1159 | else |
---|
1160 | dshift += s_inc; |
---|
1161 | } |
---|
1162 | if (sshift == s_end) |
---|
1163 | { |
---|
1164 | sshift = s_start; |
---|
1165 | sp--; |
---|
1166 | } |
---|
1167 | else |
---|
1168 | sshift += s_inc; |
---|
1169 | } |
---|
1170 | break; |
---|
1171 | } |
---|
1172 | |
---|
1173 | default: // This is the place where the routine is modified |
---|
1174 | { |
---|
1175 | __int64 const4 = 0x0000000000FFFFFF; |
---|
1176 | // __int64 const5 = 0x000000FFFFFF0000; // unused... |
---|
1177 | __int64 const6 = 0x00000000000000FF; |
---|
1178 | png_bytep sptr, dp; |
---|
1179 | png_uint_32 i; |
---|
1180 | png_size_t pixel_bytes; |
---|
1181 | int width = row_info->width; |
---|
1182 | |
---|
1183 | pixel_bytes = (row_info->pixel_depth >> 3); |
---|
1184 | |
---|
1185 | sptr = row + (width - 1) * pixel_bytes; |
---|
1186 | dp = row + (final_width - 1) * pixel_bytes; |
---|
1187 | // New code by Nirav Chhatrapati - Intel Corporation |
---|
1188 | // sign fix by GRR |
---|
1189 | // NOTE: there is NO MMX code for 48-bit and 64-bit images |
---|
1190 | |
---|
1191 | // use MMX routine if machine supports it |
---|
1192 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE) |
---|
1193 | /* && mmx_supported */ ) |
---|
1194 | { |
---|
1195 | if (pixel_bytes == 3) |
---|
1196 | { |
---|
1197 | if (((pass == 0) || (pass == 1)) && width) |
---|
1198 | { |
---|
1199 | _asm |
---|
1200 | { |
---|
1201 | mov esi, sptr |
---|
1202 | mov edi, dp |
---|
1203 | mov ecx, width |
---|
1204 | sub edi, 21 // (png_pass_inc[pass] - 1)*pixel_bytes |
---|
1205 | loop_pass0: |
---|
1206 | movd mm0, [esi] ; X X X X X v2 v1 v0 |
---|
1207 | pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 |
---|
1208 | movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 |
---|
1209 | psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 |
---|
1210 | movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 |
---|
1211 | psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 |
---|
1212 | psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 |
---|
1213 | por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 |
---|
1214 | por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 |
---|
1215 | movq mm3, mm0 ; v2 v1 v0 v2 v1 v0 v2 v1 |
---|
1216 | psllq mm0, 16 ; v0 v2 v1 v0 v2 v1 0 0 |
---|
1217 | movq mm4, mm3 ; v2 v1 v0 v2 v1 v0 v2 v1 |
---|
1218 | punpckhdq mm3, mm0 ; v0 v2 v1 v0 v2 v1 v0 v2 |
---|
1219 | movq [edi+16] , mm4 |
---|
1220 | psrlq mm0, 32 ; 0 0 0 0 v0 v2 v1 v0 |
---|
1221 | movq [edi+8] , mm3 |
---|
1222 | punpckldq mm0, mm4 ; v1 v0 v2 v1 v0 v2 v1 v0 |
---|
1223 | sub esi, 3 |
---|
1224 | movq [edi], mm0 |
---|
1225 | sub edi, 24 |
---|
1226 | //sub esi, 3 |
---|
1227 | dec ecx |
---|
1228 | jnz loop_pass0 |
---|
1229 | EMMS |
---|
1230 | } |
---|
1231 | } |
---|
1232 | else if (((pass == 2) || (pass == 3)) && width) |
---|
1233 | { |
---|
1234 | _asm |
---|
1235 | { |
---|
1236 | mov esi, sptr |
---|
1237 | mov edi, dp |
---|
1238 | mov ecx, width |
---|
1239 | sub edi, 9 // (png_pass_inc[pass] - 1)*pixel_bytes |
---|
1240 | loop_pass2: |
---|
1241 | movd mm0, [esi] ; X X X X X v2 v1 v0 |
---|
1242 | pand mm0, const4 ; 0 0 0 0 0 v2 v1 v0 |
---|
1243 | movq mm1, mm0 ; 0 0 0 0 0 v2 v1 v0 |
---|
1244 | psllq mm0, 16 ; 0 0 0 v2 v1 v0 0 0 |
---|
1245 | movq mm2, mm0 ; 0 0 0 v2 v1 v0 0 0 |
---|
1246 | psllq mm0, 24 ; v2 v1 v0 0 0 0 0 0 |
---|
1247 | psrlq mm1, 8 ; 0 0 0 0 0 0 v2 v1 |
---|
1248 | por mm0, mm2 ; v2 v1 v0 v2 v1 v0 0 0 |
---|
1249 | por mm0, mm1 ; v2 v1 v0 v2 v1 v0 v2 v1 |
---|
1250 | movq [edi+4], mm0 ; move to memory |
---|
1251 | psrlq mm0, 16 ; 0 0 v2 v1 v0 v2 v1 v0 |
---|
1252 | movd [edi], mm0 ; move to memory |
---|
1253 | sub esi, 3 |
---|
1254 | sub edi, 12 |
---|
1255 | dec ecx |
---|
1256 | jnz loop_pass2 |
---|
1257 | EMMS |
---|
1258 | } |
---|
1259 | } |
---|
1260 | else if (width) /* && ((pass == 4) || (pass == 5)) */ |
---|
1261 | { |
---|
1262 | int width_mmx = ((width >> 1) << 1) - 8; |
---|
1263 | if (width_mmx < 0) |
---|
1264 | width_mmx = 0; |
---|
1265 | width -= width_mmx; // 8 or 9 pix, 24 or 27 bytes |
---|
1266 | if (width_mmx) |
---|
1267 | { |
---|
1268 | _asm |
---|
1269 | { |
---|
1270 | mov esi, sptr |
---|
1271 | mov edi, dp |
---|
1272 | mov ecx, width_mmx |
---|
1273 | sub esi, 3 |
---|
1274 | sub edi, 9 |
---|
1275 | loop_pass4: |
---|
1276 | movq mm0, [esi] ; X X v2 v1 v0 v5 v4 v3 |
---|
1277 | movq mm7, mm0 ; X X v2 v1 v0 v5 v4 v3 |
---|
1278 | movq mm6, mm0 ; X X v2 v1 v0 v5 v4 v3 |
---|
1279 | psllq mm0, 24 ; v1 v0 v5 v4 v3 0 0 0 |
---|
1280 | pand mm7, const4 ; 0 0 0 0 0 v5 v4 v3 |
---|
1281 | psrlq mm6, 24 ; 0 0 0 X X v2 v1 v0 |
---|
1282 | por mm0, mm7 ; v1 v0 v5 v4 v3 v5 v4 v3 |
---|
1283 | movq mm5, mm6 ; 0 0 0 X X v2 v1 v0 |
---|
1284 | psllq mm6, 8 ; 0 0 X X v2 v1 v0 0 |
---|
1285 | movq [edi], mm0 ; move quad to memory |
---|
1286 | psrlq mm5, 16 ; 0 0 0 0 0 X X v2 |
---|
1287 | pand mm5, const6 ; 0 0 0 0 0 0 0 v2 |
---|
1288 | por mm6, mm5 ; 0 0 X X v2 v1 v0 v2 |
---|
1289 | movd [edi+8], mm6 ; move double to memory |
---|
1290 | sub esi, 6 |
---|
1291 | sub edi, 12 |
---|
1292 | sub ecx, 2 |
---|
1293 | jnz loop_pass4 |
---|
1294 | EMMS |
---|
1295 | } |
---|
1296 | } |
---|
1297 | |
---|
1298 | sptr -= width_mmx*3; |
---|
1299 | dp -= width_mmx*6; |
---|
1300 | for (i = width; i; i--) |
---|
1301 | { |
---|
1302 | png_byte v[8]; |
---|
1303 | int j; |
---|
1304 | |
---|
1305 | png_memcpy(v, sptr, 3); |
---|
1306 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1307 | { |
---|
1308 | png_memcpy(dp, v, 3); |
---|
1309 | dp -= 3; |
---|
1310 | } |
---|
1311 | sptr -= 3; |
---|
1312 | } |
---|
1313 | } |
---|
1314 | } /* end of pixel_bytes == 3 */ |
---|
1315 | |
---|
1316 | else if (pixel_bytes == 1) |
---|
1317 | { |
---|
1318 | if (((pass == 0) || (pass == 1)) && width) |
---|
1319 | { |
---|
1320 | int width_mmx = ((width >> 2) << 2); |
---|
1321 | width -= width_mmx; |
---|
1322 | if (width_mmx) |
---|
1323 | { |
---|
1324 | _asm |
---|
1325 | { |
---|
1326 | mov esi, sptr |
---|
1327 | mov edi, dp |
---|
1328 | mov ecx, width_mmx |
---|
1329 | sub edi, 31 |
---|
1330 | sub esi, 3 |
---|
1331 | loop1_pass0: |
---|
1332 | movd mm0, [esi] ; X X X X v0 v1 v2 v3 |
---|
1333 | movq mm1, mm0 ; X X X X v0 v1 v2 v3 |
---|
1334 | punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1335 | movq mm2, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1336 | punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
---|
1337 | movq mm3, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
---|
1338 | punpckldq mm0, mm0 ; v3 v3 v3 v3 v3 v3 v3 v3 |
---|
1339 | punpckhdq mm3, mm3 ; v2 v2 v2 v2 v2 v2 v2 v2 |
---|
1340 | movq [edi], mm0 ; move to memory v3 |
---|
1341 | punpckhwd mm2, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 |
---|
1342 | movq [edi+8], mm3 ; move to memory v2 |
---|
1343 | movq mm4, mm2 ; v0 v0 v0 v0 v1 v1 v1 v1 |
---|
1344 | punpckldq mm2, mm2 ; v1 v1 v1 v1 v1 v1 v1 v1 |
---|
1345 | punpckhdq mm4, mm4 ; v0 v0 v0 v0 v0 v0 v0 v0 |
---|
1346 | movq [edi+16], mm2 ; move to memory v1 |
---|
1347 | movq [edi+24], mm4 ; move to memory v0 |
---|
1348 | sub esi, 4 |
---|
1349 | sub edi, 32 |
---|
1350 | sub ecx, 4 |
---|
1351 | jnz loop1_pass0 |
---|
1352 | EMMS |
---|
1353 | } |
---|
1354 | } |
---|
1355 | |
---|
1356 | sptr -= width_mmx; |
---|
1357 | dp -= width_mmx*8; |
---|
1358 | for (i = width; i; i--) |
---|
1359 | { |
---|
1360 | int j; |
---|
1361 | |
---|
1362 | /* I simplified this part in version 1.0.4e |
---|
1363 | * here and in several other instances where |
---|
1364 | * pixel_bytes == 1 -- GR-P |
---|
1365 | * |
---|
1366 | * Original code: |
---|
1367 | * |
---|
1368 | * png_byte v[8]; |
---|
1369 | * png_memcpy(v, sptr, pixel_bytes); |
---|
1370 | * for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1371 | * { |
---|
1372 | * png_memcpy(dp, v, pixel_bytes); |
---|
1373 | * dp -= pixel_bytes; |
---|
1374 | * } |
---|
1375 | * sptr -= pixel_bytes; |
---|
1376 | * |
---|
1377 | * Replacement code is in the next three lines: |
---|
1378 | */ |
---|
1379 | |
---|
1380 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1381 | *dp-- = *sptr; |
---|
1382 | sptr--; |
---|
1383 | } |
---|
1384 | } |
---|
1385 | else if (((pass == 2) || (pass == 3)) && width) |
---|
1386 | { |
---|
1387 | int width_mmx = ((width >> 2) << 2); |
---|
1388 | width -= width_mmx; |
---|
1389 | if (width_mmx) |
---|
1390 | { |
---|
1391 | _asm |
---|
1392 | { |
---|
1393 | mov esi, sptr |
---|
1394 | mov edi, dp |
---|
1395 | mov ecx, width_mmx |
---|
1396 | sub edi, 15 |
---|
1397 | sub esi, 3 |
---|
1398 | loop1_pass2: |
---|
1399 | movd mm0, [esi] ; X X X X v0 v1 v2 v3 |
---|
1400 | punpcklbw mm0, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1401 | movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1402 | punpcklwd mm0, mm0 ; v2 v2 v2 v2 v3 v3 v3 v3 |
---|
1403 | punpckhwd mm1, mm1 ; v0 v0 v0 v0 v1 v1 v1 v1 |
---|
1404 | movq [edi], mm0 ; move to memory v2 and v3 |
---|
1405 | sub esi, 4 |
---|
1406 | movq [edi+8], mm1 ; move to memory v1 and v0 |
---|
1407 | sub edi, 16 |
---|
1408 | sub ecx, 4 |
---|
1409 | jnz loop1_pass2 |
---|
1410 | EMMS |
---|
1411 | } |
---|
1412 | } |
---|
1413 | |
---|
1414 | sptr -= width_mmx; |
---|
1415 | dp -= width_mmx*4; |
---|
1416 | for (i = width; i; i--) |
---|
1417 | { |
---|
1418 | int j; |
---|
1419 | |
---|
1420 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1421 | { |
---|
1422 | *dp-- = *sptr; |
---|
1423 | } |
---|
1424 | sptr --; |
---|
1425 | } |
---|
1426 | } |
---|
1427 | else if (width) /* && ((pass == 4) || (pass == 5))) */ |
---|
1428 | { |
---|
1429 | int width_mmx = ((width >> 3) << 3); |
---|
1430 | width -= width_mmx; |
---|
1431 | if (width_mmx) |
---|
1432 | { |
---|
1433 | _asm |
---|
1434 | { |
---|
1435 | mov esi, sptr |
---|
1436 | mov edi, dp |
---|
1437 | mov ecx, width_mmx |
---|
1438 | sub edi, 15 |
---|
1439 | sub esi, 7 |
---|
1440 | loop1_pass4: |
---|
1441 | movq mm0, [esi] ; v0 v1 v2 v3 v4 v5 v6 v7 |
---|
1442 | movq mm1, mm0 ; v0 v1 v2 v3 v4 v5 v6 v7 |
---|
1443 | punpcklbw mm0, mm0 ; v4 v4 v5 v5 v6 v6 v7 v7 |
---|
1444 | //movq mm1, mm0 ; v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1445 | punpckhbw mm1, mm1 ;v0 v0 v1 v1 v2 v2 v3 v3 |
---|
1446 | movq [edi+8], mm1 ; move to memory v0 v1 v2 and v3 |
---|
1447 | sub esi, 8 |
---|
1448 | movq [edi], mm0 ; move to memory v4 v5 v6 and v7 |
---|
1449 | //sub esi, 4 |
---|
1450 | sub edi, 16 |
---|
1451 | sub ecx, 8 |
---|
1452 | jnz loop1_pass4 |
---|
1453 | EMMS |
---|
1454 | } |
---|
1455 | } |
---|
1456 | |
---|
1457 | sptr -= width_mmx; |
---|
1458 | dp -= width_mmx*2; |
---|
1459 | for (i = width; i; i--) |
---|
1460 | { |
---|
1461 | int j; |
---|
1462 | |
---|
1463 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1464 | { |
---|
1465 | *dp-- = *sptr; |
---|
1466 | } |
---|
1467 | sptr --; |
---|
1468 | } |
---|
1469 | } |
---|
1470 | } /* end of pixel_bytes == 1 */ |
---|
1471 | |
---|
1472 | else if (pixel_bytes == 2) |
---|
1473 | { |
---|
1474 | if (((pass == 0) || (pass == 1)) && width) |
---|
1475 | { |
---|
1476 | int width_mmx = ((width >> 1) << 1); |
---|
1477 | width -= width_mmx; |
---|
1478 | if (width_mmx) |
---|
1479 | { |
---|
1480 | _asm |
---|
1481 | { |
---|
1482 | mov esi, sptr |
---|
1483 | mov edi, dp |
---|
1484 | mov ecx, width_mmx |
---|
1485 | sub esi, 2 |
---|
1486 | sub edi, 30 |
---|
1487 | loop2_pass0: |
---|
1488 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
---|
1489 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
---|
1490 | movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
---|
1491 | punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 |
---|
1492 | punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 |
---|
1493 | movq [edi], mm0 |
---|
1494 | movq [edi + 8], mm0 |
---|
1495 | movq [edi + 16], mm1 |
---|
1496 | movq [edi + 24], mm1 |
---|
1497 | sub esi, 4 |
---|
1498 | sub edi, 32 |
---|
1499 | sub ecx, 2 |
---|
1500 | jnz loop2_pass0 |
---|
1501 | EMMS |
---|
1502 | } |
---|
1503 | } |
---|
1504 | |
---|
1505 | sptr -= (width_mmx*2 - 2); // sign fixed |
---|
1506 | dp -= (width_mmx*16 - 2); // sign fixed |
---|
1507 | for (i = width; i; i--) |
---|
1508 | { |
---|
1509 | png_byte v[8]; |
---|
1510 | int j; |
---|
1511 | sptr -= 2; |
---|
1512 | png_memcpy(v, sptr, 2); |
---|
1513 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1514 | { |
---|
1515 | dp -= 2; |
---|
1516 | png_memcpy(dp, v, 2); |
---|
1517 | } |
---|
1518 | } |
---|
1519 | } |
---|
1520 | else if (((pass == 2) || (pass == 3)) && width) |
---|
1521 | { |
---|
1522 | int width_mmx = ((width >> 1) << 1) ; |
---|
1523 | width -= width_mmx; |
---|
1524 | if (width_mmx) |
---|
1525 | { |
---|
1526 | _asm |
---|
1527 | { |
---|
1528 | mov esi, sptr |
---|
1529 | mov edi, dp |
---|
1530 | mov ecx, width_mmx |
---|
1531 | sub esi, 2 |
---|
1532 | sub edi, 14 |
---|
1533 | loop2_pass2: |
---|
1534 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
---|
1535 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
---|
1536 | movq mm1, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
---|
1537 | punpckldq mm0, mm0 ; v3 v2 v3 v2 v3 v2 v3 v2 |
---|
1538 | punpckhdq mm1, mm1 ; v1 v0 v1 v0 v1 v0 v1 v0 |
---|
1539 | movq [edi], mm0 |
---|
1540 | sub esi, 4 |
---|
1541 | movq [edi + 8], mm1 |
---|
1542 | //sub esi, 4 |
---|
1543 | sub edi, 16 |
---|
1544 | sub ecx, 2 |
---|
1545 | jnz loop2_pass2 |
---|
1546 | EMMS |
---|
1547 | } |
---|
1548 | } |
---|
1549 | |
---|
1550 | sptr -= (width_mmx*2 - 2); // sign fixed |
---|
1551 | dp -= (width_mmx*8 - 2); // sign fixed |
---|
1552 | for (i = width; i; i--) |
---|
1553 | { |
---|
1554 | png_byte v[8]; |
---|
1555 | int j; |
---|
1556 | sptr -= 2; |
---|
1557 | png_memcpy(v, sptr, 2); |
---|
1558 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1559 | { |
---|
1560 | dp -= 2; |
---|
1561 | png_memcpy(dp, v, 2); |
---|
1562 | } |
---|
1563 | } |
---|
1564 | } |
---|
1565 | else if (width) // pass == 4 or 5 |
---|
1566 | { |
---|
1567 | int width_mmx = ((width >> 1) << 1) ; |
---|
1568 | width -= width_mmx; |
---|
1569 | if (width_mmx) |
---|
1570 | { |
---|
1571 | _asm |
---|
1572 | { |
---|
1573 | mov esi, sptr |
---|
1574 | mov edi, dp |
---|
1575 | mov ecx, width_mmx |
---|
1576 | sub esi, 2 |
---|
1577 | sub edi, 6 |
---|
1578 | loop2_pass4: |
---|
1579 | movd mm0, [esi] ; X X X X v1 v0 v3 v2 |
---|
1580 | punpcklwd mm0, mm0 ; v1 v0 v1 v0 v3 v2 v3 v2 |
---|
1581 | sub esi, 4 |
---|
1582 | movq [edi], mm0 |
---|
1583 | sub edi, 8 |
---|
1584 | sub ecx, 2 |
---|
1585 | jnz loop2_pass4 |
---|
1586 | EMMS |
---|
1587 | } |
---|
1588 | } |
---|
1589 | |
---|
1590 | sptr -= (width_mmx*2 - 2); // sign fixed |
---|
1591 | dp -= (width_mmx*4 - 2); // sign fixed |
---|
1592 | for (i = width; i; i--) |
---|
1593 | { |
---|
1594 | png_byte v[8]; |
---|
1595 | int j; |
---|
1596 | sptr -= 2; |
---|
1597 | png_memcpy(v, sptr, 2); |
---|
1598 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1599 | { |
---|
1600 | dp -= 2; |
---|
1601 | png_memcpy(dp, v, 2); |
---|
1602 | } |
---|
1603 | } |
---|
1604 | } |
---|
1605 | } /* end of pixel_bytes == 2 */ |
---|
1606 | |
---|
1607 | else if (pixel_bytes == 4) |
---|
1608 | { |
---|
1609 | if (((pass == 0) || (pass == 1)) && width) |
---|
1610 | { |
---|
1611 | int width_mmx = ((width >> 1) << 1) ; |
---|
1612 | width -= width_mmx; |
---|
1613 | if (width_mmx) |
---|
1614 | { |
---|
1615 | _asm |
---|
1616 | { |
---|
1617 | mov esi, sptr |
---|
1618 | mov edi, dp |
---|
1619 | mov ecx, width_mmx |
---|
1620 | sub esi, 4 |
---|
1621 | sub edi, 60 |
---|
1622 | loop4_pass0: |
---|
1623 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1624 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1625 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
---|
1626 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
---|
1627 | movq [edi], mm0 |
---|
1628 | movq [edi + 8], mm0 |
---|
1629 | movq [edi + 16], mm0 |
---|
1630 | movq [edi + 24], mm0 |
---|
1631 | movq [edi+32], mm1 |
---|
1632 | movq [edi + 40], mm1 |
---|
1633 | movq [edi+ 48], mm1 |
---|
1634 | sub esi, 8 |
---|
1635 | movq [edi + 56], mm1 |
---|
1636 | sub edi, 64 |
---|
1637 | sub ecx, 2 |
---|
1638 | jnz loop4_pass0 |
---|
1639 | EMMS |
---|
1640 | } |
---|
1641 | } |
---|
1642 | |
---|
1643 | sptr -= (width_mmx*4 - 4); // sign fixed |
---|
1644 | dp -= (width_mmx*32 - 4); // sign fixed |
---|
1645 | for (i = width; i; i--) |
---|
1646 | { |
---|
1647 | png_byte v[8]; |
---|
1648 | int j; |
---|
1649 | sptr -= 4; |
---|
1650 | png_memcpy(v, sptr, 4); |
---|
1651 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1652 | { |
---|
1653 | dp -= 4; |
---|
1654 | png_memcpy(dp, v, 4); |
---|
1655 | } |
---|
1656 | } |
---|
1657 | } |
---|
1658 | else if (((pass == 2) || (pass == 3)) && width) |
---|
1659 | { |
---|
1660 | int width_mmx = ((width >> 1) << 1) ; |
---|
1661 | width -= width_mmx; |
---|
1662 | if (width_mmx) |
---|
1663 | { |
---|
1664 | _asm |
---|
1665 | { |
---|
1666 | mov esi, sptr |
---|
1667 | mov edi, dp |
---|
1668 | mov ecx, width_mmx |
---|
1669 | sub esi, 4 |
---|
1670 | sub edi, 28 |
---|
1671 | loop4_pass2: |
---|
1672 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1673 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1674 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
---|
1675 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
---|
1676 | movq [edi], mm0 |
---|
1677 | movq [edi + 8], mm0 |
---|
1678 | movq [edi+16], mm1 |
---|
1679 | movq [edi + 24], mm1 |
---|
1680 | sub esi, 8 |
---|
1681 | sub edi, 32 |
---|
1682 | sub ecx, 2 |
---|
1683 | jnz loop4_pass2 |
---|
1684 | EMMS |
---|
1685 | } |
---|
1686 | } |
---|
1687 | |
---|
1688 | sptr -= (width_mmx*4 - 4); // sign fixed |
---|
1689 | dp -= (width_mmx*16 - 4); // sign fixed |
---|
1690 | for (i = width; i; i--) |
---|
1691 | { |
---|
1692 | png_byte v[8]; |
---|
1693 | int j; |
---|
1694 | sptr -= 4; |
---|
1695 | png_memcpy(v, sptr, 4); |
---|
1696 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1697 | { |
---|
1698 | dp -= 4; |
---|
1699 | png_memcpy(dp, v, 4); |
---|
1700 | } |
---|
1701 | } |
---|
1702 | } |
---|
1703 | else if (width) // pass == 4 or 5 |
---|
1704 | { |
---|
1705 | int width_mmx = ((width >> 1) << 1) ; |
---|
1706 | width -= width_mmx; |
---|
1707 | if (width_mmx) |
---|
1708 | { |
---|
1709 | _asm |
---|
1710 | { |
---|
1711 | mov esi, sptr |
---|
1712 | mov edi, dp |
---|
1713 | mov ecx, width_mmx |
---|
1714 | sub esi, 4 |
---|
1715 | sub edi, 12 |
---|
1716 | loop4_pass4: |
---|
1717 | movq mm0, [esi] ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1718 | movq mm1, mm0 ; v3 v2 v1 v0 v7 v6 v5 v4 |
---|
1719 | punpckldq mm0, mm0 ; v7 v6 v5 v4 v7 v6 v5 v4 |
---|
1720 | punpckhdq mm1, mm1 ; v3 v2 v1 v0 v3 v2 v1 v0 |
---|
1721 | movq [edi], mm0 |
---|
1722 | sub esi, 8 |
---|
1723 | movq [edi + 8], mm1 |
---|
1724 | sub edi, 16 |
---|
1725 | sub ecx, 2 |
---|
1726 | jnz loop4_pass4 |
---|
1727 | EMMS |
---|
1728 | } |
---|
1729 | } |
---|
1730 | |
---|
1731 | sptr -= (width_mmx*4 - 4); // sign fixed |
---|
1732 | dp -= (width_mmx*8 - 4); // sign fixed |
---|
1733 | for (i = width; i; i--) |
---|
1734 | { |
---|
1735 | png_byte v[8]; |
---|
1736 | int j; |
---|
1737 | sptr -= 4; |
---|
1738 | png_memcpy(v, sptr, 4); |
---|
1739 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1740 | { |
---|
1741 | dp -= 4; |
---|
1742 | png_memcpy(dp, v, 4); |
---|
1743 | } |
---|
1744 | } |
---|
1745 | } |
---|
1746 | |
---|
1747 | } /* end of pixel_bytes == 4 */ |
---|
1748 | |
---|
1749 | else if (pixel_bytes == 6) |
---|
1750 | { |
---|
1751 | for (i = width; i; i--) |
---|
1752 | { |
---|
1753 | png_byte v[8]; |
---|
1754 | int j; |
---|
1755 | png_memcpy(v, sptr, 6); |
---|
1756 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1757 | { |
---|
1758 | png_memcpy(dp, v, 6); |
---|
1759 | dp -= 6; |
---|
1760 | } |
---|
1761 | sptr -= 6; |
---|
1762 | } |
---|
1763 | } /* end of pixel_bytes == 6 */ |
---|
1764 | |
---|
1765 | else |
---|
1766 | { |
---|
1767 | for (i = width; i; i--) |
---|
1768 | { |
---|
1769 | png_byte v[8]; |
---|
1770 | int j; |
---|
1771 | png_memcpy(v, sptr, pixel_bytes); |
---|
1772 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1773 | { |
---|
1774 | png_memcpy(dp, v, pixel_bytes); |
---|
1775 | dp -= pixel_bytes; |
---|
1776 | } |
---|
1777 | sptr-= pixel_bytes; |
---|
1778 | } |
---|
1779 | } |
---|
1780 | } /* end of mmx_supported */ |
---|
1781 | |
---|
1782 | else /* MMX not supported: use modified C code - takes advantage |
---|
1783 | * of inlining of memcpy for a constant */ |
---|
1784 | { |
---|
1785 | if (pixel_bytes == 1) |
---|
1786 | { |
---|
1787 | for (i = width; i; i--) |
---|
1788 | { |
---|
1789 | int j; |
---|
1790 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1791 | *dp-- = *sptr; |
---|
1792 | sptr--; |
---|
1793 | } |
---|
1794 | } |
---|
1795 | else if (pixel_bytes == 3) |
---|
1796 | { |
---|
1797 | for (i = width; i; i--) |
---|
1798 | { |
---|
1799 | png_byte v[8]; |
---|
1800 | int j; |
---|
1801 | png_memcpy(v, sptr, pixel_bytes); |
---|
1802 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1803 | { |
---|
1804 | png_memcpy(dp, v, pixel_bytes); |
---|
1805 | dp -= pixel_bytes; |
---|
1806 | } |
---|
1807 | sptr -= pixel_bytes; |
---|
1808 | } |
---|
1809 | } |
---|
1810 | else if (pixel_bytes == 2) |
---|
1811 | { |
---|
1812 | for (i = width; i; i--) |
---|
1813 | { |
---|
1814 | png_byte v[8]; |
---|
1815 | int j; |
---|
1816 | png_memcpy(v, sptr, pixel_bytes); |
---|
1817 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1818 | { |
---|
1819 | png_memcpy(dp, v, pixel_bytes); |
---|
1820 | dp -= pixel_bytes; |
---|
1821 | } |
---|
1822 | sptr -= pixel_bytes; |
---|
1823 | } |
---|
1824 | } |
---|
1825 | else if (pixel_bytes == 4) |
---|
1826 | { |
---|
1827 | for (i = width; i; i--) |
---|
1828 | { |
---|
1829 | png_byte v[8]; |
---|
1830 | int j; |
---|
1831 | png_memcpy(v, sptr, pixel_bytes); |
---|
1832 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1833 | { |
---|
1834 | png_memcpy(dp, v, pixel_bytes); |
---|
1835 | dp -= pixel_bytes; |
---|
1836 | } |
---|
1837 | sptr -= pixel_bytes; |
---|
1838 | } |
---|
1839 | } |
---|
1840 | else if (pixel_bytes == 6) |
---|
1841 | { |
---|
1842 | for (i = width; i; i--) |
---|
1843 | { |
---|
1844 | png_byte v[8]; |
---|
1845 | int j; |
---|
1846 | png_memcpy(v, sptr, pixel_bytes); |
---|
1847 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1848 | { |
---|
1849 | png_memcpy(dp, v, pixel_bytes); |
---|
1850 | dp -= pixel_bytes; |
---|
1851 | } |
---|
1852 | sptr -= pixel_bytes; |
---|
1853 | } |
---|
1854 | } |
---|
1855 | else |
---|
1856 | { |
---|
1857 | for (i = width; i; i--) |
---|
1858 | { |
---|
1859 | png_byte v[8]; |
---|
1860 | int j; |
---|
1861 | png_memcpy(v, sptr, pixel_bytes); |
---|
1862 | for (j = 0; j < png_pass_inc[pass]; j++) |
---|
1863 | { |
---|
1864 | png_memcpy(dp, v, pixel_bytes); |
---|
1865 | dp -= pixel_bytes; |
---|
1866 | } |
---|
1867 | sptr -= pixel_bytes; |
---|
1868 | } |
---|
1869 | } |
---|
1870 | |
---|
1871 | } /* end of MMX not supported */ |
---|
1872 | break; |
---|
1873 | } |
---|
1874 | } /* end switch (row_info->pixel_depth) */ |
---|
1875 | |
---|
1876 | row_info->width = final_width; |
---|
1877 | row_info->rowbytes = ((final_width * |
---|
1878 | (png_uint_32)row_info->pixel_depth + 7) >> 3); |
---|
1879 | } |
---|
1880 | |
---|
1881 | } |
---|
1882 | |
---|
1883 | #endif /* PNG_READ_INTERLACING_SUPPORTED */ |
---|
1884 | |
---|
1885 | |
---|
1886 | // These variables are utilized in the functions below. They are declared |
---|
1887 | // globally here to ensure alignment on 8-byte boundaries. |
---|
1888 | |
---|
1889 | union uAll { |
---|
1890 | __int64 use; |
---|
1891 | double align; |
---|
1892 | } LBCarryMask = {0x0101010101010101}, |
---|
1893 | HBClearMask = {0x7f7f7f7f7f7f7f7f}, |
---|
1894 | ActiveMask, ActiveMask2, ActiveMaskEnd, ShiftBpp, ShiftRem; |
---|
1895 | |
---|
1896 | |
---|
1897 | // Optimized code for PNG Average filter decoder |
---|
1898 | void /* PRIVATE */ |
---|
1899 | png_read_filter_row_mmx_avg(png_row_infop row_info, png_bytep row |
---|
1900 | , png_bytep prev_row) |
---|
1901 | { |
---|
1902 | int bpp; |
---|
1903 | png_uint_32 FullLength; |
---|
1904 | png_uint_32 MMXLength; |
---|
1905 | //png_uint_32 len; |
---|
1906 | int diff; |
---|
1907 | |
---|
1908 | bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel |
---|
1909 | FullLength = row_info->rowbytes; // # of bytes to filter |
---|
1910 | _asm { |
---|
1911 | // Init address pointers and offset |
---|
1912 | mov edi, row // edi ==> Avg(x) |
---|
1913 | xor ebx, ebx // ebx ==> x |
---|
1914 | mov edx, edi |
---|
1915 | mov esi, prev_row // esi ==> Prior(x) |
---|
1916 | sub edx, bpp // edx ==> Raw(x-bpp) |
---|
1917 | |
---|
1918 | xor eax, eax |
---|
1919 | // Compute the Raw value for the first bpp bytes |
---|
1920 | // Raw(x) = Avg(x) + (Prior(x)/2) |
---|
1921 | davgrlp: |
---|
1922 | mov al, [esi + ebx] // Load al with Prior(x) |
---|
1923 | inc ebx |
---|
1924 | shr al, 1 // divide by 2 |
---|
1925 | add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx |
---|
1926 | cmp ebx, bpp |
---|
1927 | mov [edi+ebx-1], al // Write back Raw(x); |
---|
1928 | // mov does not affect flags; -1 to offset inc ebx |
---|
1929 | jb davgrlp |
---|
1930 | // get # of bytes to alignment |
---|
1931 | mov diff, edi // take start of row |
---|
1932 | add diff, ebx // add bpp |
---|
1933 | add diff, 0xf // add 7 + 8 to incr past alignment boundary |
---|
1934 | and diff, 0xfffffff8 // mask to alignment boundary |
---|
1935 | sub diff, edi // subtract from start ==> value ebx at alignment |
---|
1936 | jz davggo |
---|
1937 | // fix alignment |
---|
1938 | // Compute the Raw value for the bytes upto the alignment boundary |
---|
1939 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
---|
1940 | xor ecx, ecx |
---|
1941 | davglp1: |
---|
1942 | xor eax, eax |
---|
1943 | mov cl, [esi + ebx] // load cl with Prior(x) |
---|
1944 | mov al, [edx + ebx] // load al with Raw(x-bpp) |
---|
1945 | add ax, cx |
---|
1946 | inc ebx |
---|
1947 | shr ax, 1 // divide by 2 |
---|
1948 | add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx |
---|
1949 | cmp ebx, diff // Check if at alignment boundary |
---|
1950 | mov [edi+ebx-1], al // Write back Raw(x); |
---|
1951 | // mov does not affect flags; -1 to offset inc ebx |
---|
1952 | jb davglp1 // Repeat until at alignment boundary |
---|
1953 | davggo: |
---|
1954 | mov eax, FullLength |
---|
1955 | mov ecx, eax |
---|
1956 | sub eax, ebx // subtract alignment fix |
---|
1957 | and eax, 0x00000007 // calc bytes over mult of 8 |
---|
1958 | sub ecx, eax // drop over bytes from original length |
---|
1959 | mov MMXLength, ecx |
---|
1960 | } // end _asm block |
---|
1961 | // Now do the math for the rest of the row |
---|
1962 | switch ( bpp ) |
---|
1963 | { |
---|
1964 | case 3: |
---|
1965 | { |
---|
1966 | ActiveMask.use = 0x0000000000ffffff; |
---|
1967 | ShiftBpp.use = 24; // == 3 * 8 |
---|
1968 | ShiftRem.use = 40; // == 64 - 24 |
---|
1969 | _asm { |
---|
1970 | // Re-init address pointers and offset |
---|
1971 | movq mm7, ActiveMask |
---|
1972 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
1973 | movq mm5, LBCarryMask |
---|
1974 | mov edi, row // edi ==> Avg(x) |
---|
1975 | movq mm4, HBClearMask |
---|
1976 | mov esi, prev_row // esi ==> Prior(x) |
---|
1977 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
1978 | movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes |
---|
1979 | // (we correct position in loop below) |
---|
1980 | davg3lp: |
---|
1981 | movq mm0, [edi + ebx] // Load mm0 with Avg(x) |
---|
1982 | // Add (Prev_row/2) to Average |
---|
1983 | movq mm3, mm5 |
---|
1984 | psrlq mm2, ShiftRem // Correct position Raw(x-bpp) data |
---|
1985 | movq mm1, [esi + ebx] // Load mm1 with Prior(x) |
---|
1986 | movq mm6, mm7 |
---|
1987 | pand mm3, mm1 // get lsb for each prev_row byte |
---|
1988 | psrlq mm1, 1 // divide prev_row bytes by 2 |
---|
1989 | pand mm1, mm4 // clear invalid bit 7 of each byte |
---|
1990 | paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte |
---|
1991 | // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
1992 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
1993 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
1994 | // lsb's were == 1 (Only valid for active group) |
---|
1995 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
1996 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
1997 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
1998 | pand mm2, mm6 // Leave only Active Group 1 bytes to add to Avg |
---|
1999 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active |
---|
2000 | // byte |
---|
2001 | // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2002 | psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 3-5 |
---|
2003 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2004 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2005 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2006 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2007 | // lsb's were == 1 (Only valid for active group) |
---|
2008 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2009 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2010 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2011 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2012 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active |
---|
2013 | // byte |
---|
2014 | |
---|
2015 | // Add 3rd active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2016 | psllq mm6, ShiftBpp // shift the mm6 mask to cover the last two |
---|
2017 | // bytes |
---|
2018 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2019 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2020 | // Data only needs to be shifted once here to |
---|
2021 | // get the correct x-bpp offset. |
---|
2022 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2023 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2024 | // lsb's were == 1 (Only valid for active group) |
---|
2025 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2026 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2027 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2028 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2029 | add ebx, 8 |
---|
2030 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active |
---|
2031 | // byte |
---|
2032 | |
---|
2033 | // Now ready to write back to memory |
---|
2034 | movq [edi + ebx - 8], mm0 |
---|
2035 | // Move updated Raw(x) to use as Raw(x-bpp) for next loop |
---|
2036 | cmp ebx, MMXLength |
---|
2037 | movq mm2, mm0 // mov updated Raw(x) to mm2 |
---|
2038 | jb davg3lp |
---|
2039 | } // end _asm block |
---|
2040 | } |
---|
2041 | break; |
---|
2042 | |
---|
2043 | case 6: |
---|
2044 | case 4: |
---|
2045 | case 7: |
---|
2046 | case 5: |
---|
2047 | { |
---|
2048 | ActiveMask.use = 0xffffffffffffffff; // use shift below to clear |
---|
2049 | // appropriate inactive bytes |
---|
2050 | ShiftBpp.use = bpp << 3; |
---|
2051 | ShiftRem.use = 64 - ShiftBpp.use; |
---|
2052 | _asm { |
---|
2053 | movq mm4, HBClearMask |
---|
2054 | // Re-init address pointers and offset |
---|
2055 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
2056 | // Load ActiveMask and clear all bytes except for 1st active group |
---|
2057 | movq mm7, ActiveMask |
---|
2058 | mov edi, row // edi ==> Avg(x) |
---|
2059 | psrlq mm7, ShiftRem |
---|
2060 | mov esi, prev_row // esi ==> Prior(x) |
---|
2061 | movq mm6, mm7 |
---|
2062 | movq mm5, LBCarryMask |
---|
2063 | psllq mm6, ShiftBpp // Create mask for 2nd active group |
---|
2064 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2065 | movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes |
---|
2066 | // (we correct position in loop below) |
---|
2067 | davg4lp: |
---|
2068 | movq mm0, [edi + ebx] |
---|
2069 | psrlq mm2, ShiftRem // shift data to position correctly |
---|
2070 | movq mm1, [esi + ebx] |
---|
2071 | // Add (Prev_row/2) to Average |
---|
2072 | movq mm3, mm5 |
---|
2073 | pand mm3, mm1 // get lsb for each prev_row byte |
---|
2074 | psrlq mm1, 1 // divide prev_row bytes by 2 |
---|
2075 | pand mm1, mm4 // clear invalid bit 7 of each byte |
---|
2076 | paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte |
---|
2077 | // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2078 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2079 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2080 | // lsb's were == 1 (Only valid for active group) |
---|
2081 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2082 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2083 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2084 | pand mm2, mm7 // Leave only Active Group 1 bytes to add to Avg |
---|
2085 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active |
---|
2086 | // byte |
---|
2087 | // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2088 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2089 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2090 | add ebx, 8 |
---|
2091 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2092 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2093 | // lsb's were == 1 (Only valid for active group) |
---|
2094 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2095 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2096 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2097 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2098 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active |
---|
2099 | // byte |
---|
2100 | cmp ebx, MMXLength |
---|
2101 | // Now ready to write back to memory |
---|
2102 | movq [edi + ebx - 8], mm0 |
---|
2103 | // Prep Raw(x-bpp) for next loop |
---|
2104 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2105 | jb davg4lp |
---|
2106 | } // end _asm block |
---|
2107 | } |
---|
2108 | break; |
---|
2109 | case 2: |
---|
2110 | { |
---|
2111 | ActiveMask.use = 0x000000000000ffff; |
---|
2112 | ShiftBpp.use = 16; // == 2 * 8 [BUGFIX] |
---|
2113 | ShiftRem.use = 48; // == 64 - 16 [BUGFIX] |
---|
2114 | _asm { |
---|
2115 | // Load ActiveMask |
---|
2116 | movq mm7, ActiveMask |
---|
2117 | // Re-init address pointers and offset |
---|
2118 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
2119 | movq mm5, LBCarryMask |
---|
2120 | mov edi, row // edi ==> Avg(x) |
---|
2121 | movq mm4, HBClearMask |
---|
2122 | mov esi, prev_row // esi ==> Prior(x) |
---|
2123 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2124 | movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes |
---|
2125 | // (we correct position in loop below) |
---|
2126 | davg2lp: |
---|
2127 | movq mm0, [edi + ebx] |
---|
2128 | psrlq mm2, ShiftRem // shift data to position correctly [BUGFIX] |
---|
2129 | movq mm1, [esi + ebx] |
---|
2130 | // Add (Prev_row/2) to Average |
---|
2131 | movq mm3, mm5 |
---|
2132 | pand mm3, mm1 // get lsb for each prev_row byte |
---|
2133 | psrlq mm1, 1 // divide prev_row bytes by 2 |
---|
2134 | pand mm1, mm4 // clear invalid bit 7 of each byte |
---|
2135 | movq mm6, mm7 |
---|
2136 | paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte |
---|
2137 | // Add 1st active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2138 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2139 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2140 | // lsb's were == 1 (Only valid for active group) |
---|
2141 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2142 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2143 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2144 | pand mm2, mm6 // Leave only Active Group 1 bytes to add to Avg |
---|
2145 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte |
---|
2146 | // Add 2nd active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2147 | psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 2 & 3 |
---|
2148 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2149 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2150 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2151 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2152 | // lsb's were == 1 (Only valid for active group) |
---|
2153 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2154 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2155 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2156 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2157 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte |
---|
2158 | |
---|
2159 | // Add rdd active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2160 | psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 4 & 5 |
---|
2161 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2162 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2163 | // Data only needs to be shifted once here to |
---|
2164 | // get the correct x-bpp offset. |
---|
2165 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2166 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2167 | // lsb's were == 1 (Only valid for active group) |
---|
2168 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2169 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2170 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2171 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2172 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte |
---|
2173 | |
---|
2174 | // Add 4th active group (Raw(x-bpp)/2) to Average with LBCarry |
---|
2175 | psllq mm6, ShiftBpp // shift the mm6 mask to cover bytes 6 & 7 |
---|
2176 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2177 | psllq mm2, ShiftBpp // shift data to position correctly |
---|
2178 | // Data only needs to be shifted once here to |
---|
2179 | // get the correct x-bpp offset. |
---|
2180 | add ebx, 8 |
---|
2181 | movq mm1, mm3 // now use mm1 for getting LBCarrys |
---|
2182 | pand mm1, mm2 // get LBCarrys for each byte where both |
---|
2183 | // lsb's were == 1 (Only valid for active group) |
---|
2184 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2185 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2186 | paddb mm2, mm1 // add LBCarrys to (Raw(x-bpp)/2) for each byte |
---|
2187 | pand mm2, mm6 // Leave only Active Group 2 bytes to add to Avg |
---|
2188 | paddb mm0, mm2 // add (Raw/2) + LBCarrys to Avg for each Active byte |
---|
2189 | |
---|
2190 | cmp ebx, MMXLength |
---|
2191 | // Now ready to write back to memory |
---|
2192 | movq [edi + ebx - 8], mm0 |
---|
2193 | // Prep Raw(x-bpp) for next loop |
---|
2194 | movq mm2, mm0 // mov updated Raws to mm2 |
---|
2195 | jb davg2lp |
---|
2196 | } // end _asm block |
---|
2197 | } |
---|
2198 | break; |
---|
2199 | |
---|
2200 | case 1: // bpp == 1 |
---|
2201 | { |
---|
2202 | _asm { |
---|
2203 | // Re-init address pointers and offset |
---|
2204 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
2205 | mov edi, row // edi ==> Avg(x) |
---|
2206 | cmp ebx, FullLength // Test if offset at end of array |
---|
2207 | jnb davg1end |
---|
2208 | // Do Paeth decode for remaining bytes |
---|
2209 | mov esi, prev_row // esi ==> Prior(x) |
---|
2210 | mov edx, edi |
---|
2211 | xor ecx, ecx // zero ecx before using cl & cx in loop below |
---|
2212 | sub edx, bpp // edx ==> Raw(x-bpp) |
---|
2213 | davg1lp: |
---|
2214 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
---|
2215 | xor eax, eax |
---|
2216 | mov cl, [esi + ebx] // load cl with Prior(x) |
---|
2217 | mov al, [edx + ebx] // load al with Raw(x-bpp) |
---|
2218 | add ax, cx |
---|
2219 | inc ebx |
---|
2220 | shr ax, 1 // divide by 2 |
---|
2221 | add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx |
---|
2222 | cmp ebx, FullLength // Check if at end of array |
---|
2223 | mov [edi+ebx-1], al // Write back Raw(x); |
---|
2224 | // mov does not affect flags; -1 to offset inc ebx |
---|
2225 | jb davg1lp |
---|
2226 | davg1end: |
---|
2227 | } // end _asm block |
---|
2228 | } |
---|
2229 | return; |
---|
2230 | |
---|
2231 | case 8: // bpp == 8 |
---|
2232 | { |
---|
2233 | _asm { |
---|
2234 | // Re-init address pointers and offset |
---|
2235 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
2236 | movq mm5, LBCarryMask |
---|
2237 | mov edi, row // edi ==> Avg(x) |
---|
2238 | movq mm4, HBClearMask |
---|
2239 | mov esi, prev_row // esi ==> Prior(x) |
---|
2240 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2241 | movq mm2, [edi + ebx - 8] // Load previous aligned 8 bytes |
---|
2242 | // (NO NEED to correct position in loop below) |
---|
2243 | davg8lp: |
---|
2244 | movq mm0, [edi + ebx] |
---|
2245 | movq mm3, mm5 |
---|
2246 | movq mm1, [esi + ebx] |
---|
2247 | add ebx, 8 |
---|
2248 | pand mm3, mm1 // get lsb for each prev_row byte |
---|
2249 | psrlq mm1, 1 // divide prev_row bytes by 2 |
---|
2250 | pand mm3, mm2 // get LBCarrys for each byte where both |
---|
2251 | // lsb's were == 1 |
---|
2252 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2253 | pand mm1, mm4 // clear invalid bit 7 of each byte |
---|
2254 | paddb mm0, mm3 // add LBCarrys to Avg for each byte |
---|
2255 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2256 | paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte |
---|
2257 | paddb mm0, mm2 // add (Raw/2) to Avg for each byte |
---|
2258 | cmp ebx, MMXLength |
---|
2259 | movq [edi + ebx - 8], mm0 |
---|
2260 | movq mm2, mm0 // reuse as Raw(x-bpp) |
---|
2261 | jb davg8lp |
---|
2262 | } // end _asm block |
---|
2263 | } |
---|
2264 | break; |
---|
2265 | default: // bpp greater than 8 |
---|
2266 | { |
---|
2267 | _asm { |
---|
2268 | movq mm5, LBCarryMask |
---|
2269 | // Re-init address pointers and offset |
---|
2270 | mov ebx, diff // ebx ==> x = offset to alignment boundary |
---|
2271 | mov edi, row // edi ==> Avg(x) |
---|
2272 | movq mm4, HBClearMask |
---|
2273 | mov edx, edi |
---|
2274 | mov esi, prev_row // esi ==> Prior(x) |
---|
2275 | sub edx, bpp // edx ==> Raw(x-bpp) |
---|
2276 | davgAlp: |
---|
2277 | movq mm0, [edi + ebx] |
---|
2278 | movq mm3, mm5 |
---|
2279 | movq mm1, [esi + ebx] |
---|
2280 | pand mm3, mm1 // get lsb for each prev_row byte |
---|
2281 | movq mm2, [edx + ebx] |
---|
2282 | psrlq mm1, 1 // divide prev_row bytes by 2 |
---|
2283 | pand mm3, mm2 // get LBCarrys for each byte where both |
---|
2284 | // lsb's were == 1 |
---|
2285 | psrlq mm2, 1 // divide raw bytes by 2 |
---|
2286 | pand mm1, mm4 // clear invalid bit 7 of each byte |
---|
2287 | paddb mm0, mm3 // add LBCarrys to Avg for each byte |
---|
2288 | pand mm2, mm4 // clear invalid bit 7 of each byte |
---|
2289 | paddb mm0, mm1 // add (Prev_row/2) to Avg for each byte |
---|
2290 | add ebx, 8 |
---|
2291 | paddb mm0, mm2 // add (Raw/2) to Avg for each byte |
---|
2292 | cmp ebx, MMXLength |
---|
2293 | movq [edi + ebx - 8], mm0 |
---|
2294 | jb davgAlp |
---|
2295 | } // end _asm block |
---|
2296 | } |
---|
2297 | break; |
---|
2298 | } // end switch ( bpp ) |
---|
2299 | |
---|
2300 | _asm { |
---|
2301 | // MMX acceleration complete now do clean-up |
---|
2302 | // Check if any remaining bytes left to decode |
---|
2303 | mov ebx, MMXLength // ebx ==> x = offset bytes remaining after MMX |
---|
2304 | mov edi, row // edi ==> Avg(x) |
---|
2305 | cmp ebx, FullLength // Test if offset at end of array |
---|
2306 | jnb davgend |
---|
2307 | // Do Paeth decode for remaining bytes |
---|
2308 | mov esi, prev_row // esi ==> Prior(x) |
---|
2309 | mov edx, edi |
---|
2310 | xor ecx, ecx // zero ecx before using cl & cx in loop below |
---|
2311 | sub edx, bpp // edx ==> Raw(x-bpp) |
---|
2312 | davglp2: |
---|
2313 | // Raw(x) = Avg(x) + ((Raw(x-bpp) + Prior(x))/2) |
---|
2314 | xor eax, eax |
---|
2315 | mov cl, [esi + ebx] // load cl with Prior(x) |
---|
2316 | mov al, [edx + ebx] // load al with Raw(x-bpp) |
---|
2317 | add ax, cx |
---|
2318 | inc ebx |
---|
2319 | shr ax, 1 // divide by 2 |
---|
2320 | add al, [edi+ebx-1] // Add Avg(x); -1 to offset inc ebx |
---|
2321 | cmp ebx, FullLength // Check if at end of array |
---|
2322 | mov [edi+ebx-1], al // Write back Raw(x); |
---|
2323 | // mov does not affect flags; -1 to offset inc ebx |
---|
2324 | jb davglp2 |
---|
2325 | davgend: |
---|
2326 | emms // End MMX instructions; prep for possible FP instrs. |
---|
2327 | } // end _asm block |
---|
2328 | } |
---|
2329 | |
---|
2330 | // Optimized code for PNG Paeth filter decoder |
---|
2331 | void /* PRIVATE */ |
---|
2332 | png_read_filter_row_mmx_paeth(png_row_infop row_info, png_bytep row, |
---|
2333 | png_bytep prev_row) |
---|
2334 | { |
---|
2335 | png_uint_32 FullLength; |
---|
2336 | png_uint_32 MMXLength; |
---|
2337 | //png_uint_32 len; |
---|
2338 | int bpp; |
---|
2339 | int diff; |
---|
2340 | //int ptemp; |
---|
2341 | int patemp, pbtemp, pctemp; |
---|
2342 | |
---|
2343 | bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel |
---|
2344 | FullLength = row_info->rowbytes; // # of bytes to filter |
---|
2345 | _asm |
---|
2346 | { |
---|
2347 | xor ebx, ebx // ebx ==> x offset |
---|
2348 | mov edi, row |
---|
2349 | xor edx, edx // edx ==> x-bpp offset |
---|
2350 | mov esi, prev_row |
---|
2351 | xor eax, eax |
---|
2352 | |
---|
2353 | // Compute the Raw value for the first bpp bytes |
---|
2354 | // Note: the formula works out to be always |
---|
2355 | // Paeth(x) = Raw(x) + Prior(x) where x < bpp |
---|
2356 | dpthrlp: |
---|
2357 | mov al, [edi + ebx] |
---|
2358 | add al, [esi + ebx] |
---|
2359 | inc ebx |
---|
2360 | cmp ebx, bpp |
---|
2361 | mov [edi + ebx - 1], al |
---|
2362 | jb dpthrlp |
---|
2363 | // get # of bytes to alignment |
---|
2364 | mov diff, edi // take start of row |
---|
2365 | add diff, ebx // add bpp |
---|
2366 | xor ecx, ecx |
---|
2367 | add diff, 0xf // add 7 + 8 to incr past alignment boundary |
---|
2368 | and diff, 0xfffffff8 // mask to alignment boundary |
---|
2369 | sub diff, edi // subtract from start ==> value ebx at alignment |
---|
2370 | jz dpthgo |
---|
2371 | // fix alignment |
---|
2372 | dpthlp1: |
---|
2373 | xor eax, eax |
---|
2374 | // pav = p - a = (a + b - c) - a = b - c |
---|
2375 | mov al, [esi + ebx] // load Prior(x) into al |
---|
2376 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
2377 | sub eax, ecx // subtract Prior(x-bpp) |
---|
2378 | mov patemp, eax // Save pav for later use |
---|
2379 | xor eax, eax |
---|
2380 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2381 | mov al, [edi + edx] // load Raw(x-bpp) into al |
---|
2382 | sub eax, ecx // subtract Prior(x-bpp) |
---|
2383 | mov ecx, eax |
---|
2384 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2385 | add eax, patemp // pcv = pav + pbv |
---|
2386 | // pc = abs(pcv) |
---|
2387 | test eax, 0x80000000 |
---|
2388 | jz dpthpca |
---|
2389 | neg eax // reverse sign of neg values |
---|
2390 | dpthpca: |
---|
2391 | mov pctemp, eax // save pc for later use |
---|
2392 | // pb = abs(pbv) |
---|
2393 | test ecx, 0x80000000 |
---|
2394 | jz dpthpba |
---|
2395 | neg ecx // reverse sign of neg values |
---|
2396 | dpthpba: |
---|
2397 | mov pbtemp, ecx // save pb for later use |
---|
2398 | // pa = abs(pav) |
---|
2399 | mov eax, patemp |
---|
2400 | test eax, 0x80000000 |
---|
2401 | jz dpthpaa |
---|
2402 | neg eax // reverse sign of neg values |
---|
2403 | dpthpaa: |
---|
2404 | mov patemp, eax // save pa for later use |
---|
2405 | // test if pa <= pb |
---|
2406 | cmp eax, ecx |
---|
2407 | jna dpthabb |
---|
2408 | // pa > pb; now test if pb <= pc |
---|
2409 | cmp ecx, pctemp |
---|
2410 | jna dpthbbc |
---|
2411 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
2412 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
2413 | jmp dpthpaeth |
---|
2414 | dpthbbc: |
---|
2415 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
---|
2416 | mov cl, [esi + ebx] // load Prior(x) into cl |
---|
2417 | jmp dpthpaeth |
---|
2418 | dpthabb: |
---|
2419 | // pa <= pb; now test if pa <= pc |
---|
2420 | cmp eax, pctemp |
---|
2421 | jna dpthabc |
---|
2422 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
2423 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
2424 | jmp dpthpaeth |
---|
2425 | dpthabc: |
---|
2426 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
---|
2427 | mov cl, [edi + edx] // load Raw(x-bpp) into cl |
---|
2428 | dpthpaeth: |
---|
2429 | inc ebx |
---|
2430 | inc edx |
---|
2431 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
---|
2432 | add [edi + ebx - 1], cl |
---|
2433 | cmp ebx, diff |
---|
2434 | jb dpthlp1 |
---|
2435 | dpthgo: |
---|
2436 | mov ecx, FullLength |
---|
2437 | mov eax, ecx |
---|
2438 | sub eax, ebx // subtract alignment fix |
---|
2439 | and eax, 0x00000007 // calc bytes over mult of 8 |
---|
2440 | sub ecx, eax // drop over bytes from original length |
---|
2441 | mov MMXLength, ecx |
---|
2442 | } // end _asm block |
---|
2443 | // Now do the math for the rest of the row |
---|
2444 | switch ( bpp ) |
---|
2445 | { |
---|
2446 | case 3: |
---|
2447 | { |
---|
2448 | ActiveMask.use = 0x0000000000ffffff; |
---|
2449 | ActiveMaskEnd.use = 0xffff000000000000; |
---|
2450 | ShiftBpp.use = 24; // == bpp(3) * 8 |
---|
2451 | ShiftRem.use = 40; // == 64 - 24 |
---|
2452 | _asm |
---|
2453 | { |
---|
2454 | mov ebx, diff |
---|
2455 | mov edi, row |
---|
2456 | mov esi, prev_row |
---|
2457 | pxor mm0, mm0 |
---|
2458 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2459 | movq mm1, [edi+ebx-8] |
---|
2460 | dpth3lp: |
---|
2461 | psrlq mm1, ShiftRem // shift last 3 bytes to 1st 3 bytes |
---|
2462 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2463 | punpcklbw mm1, mm0 // Unpack High bytes of a |
---|
2464 | movq mm3, [esi+ebx-8] // Prep c=Prior(x-bpp) bytes |
---|
2465 | punpcklbw mm2, mm0 // Unpack High bytes of b |
---|
2466 | psrlq mm3, ShiftRem // shift last 3 bytes to 1st 3 bytes |
---|
2467 | // pav = p - a = (a + b - c) - a = b - c |
---|
2468 | movq mm4, mm2 |
---|
2469 | punpcklbw mm3, mm0 // Unpack High bytes of c |
---|
2470 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2471 | movq mm5, mm1 |
---|
2472 | psubw mm4, mm3 |
---|
2473 | pxor mm7, mm7 |
---|
2474 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2475 | movq mm6, mm4 |
---|
2476 | psubw mm5, mm3 |
---|
2477 | |
---|
2478 | // pa = abs(p-a) = abs(pav) |
---|
2479 | // pb = abs(p-b) = abs(pbv) |
---|
2480 | // pc = abs(p-c) = abs(pcv) |
---|
2481 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2482 | paddw mm6, mm5 |
---|
2483 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2484 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2485 | psubw mm4, mm0 |
---|
2486 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2487 | psubw mm4, mm0 |
---|
2488 | psubw mm5, mm7 |
---|
2489 | pxor mm0, mm0 |
---|
2490 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2491 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2492 | psubw mm5, mm7 |
---|
2493 | psubw mm6, mm0 |
---|
2494 | // test pa <= pb |
---|
2495 | movq mm7, mm4 |
---|
2496 | psubw mm6, mm0 |
---|
2497 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2498 | movq mm0, mm7 |
---|
2499 | // use mm7 mask to merge pa & pb |
---|
2500 | pand mm5, mm7 |
---|
2501 | // use mm0 mask copy to merge a & b |
---|
2502 | pand mm2, mm0 |
---|
2503 | pandn mm7, mm4 |
---|
2504 | pandn mm0, mm1 |
---|
2505 | paddw mm7, mm5 |
---|
2506 | paddw mm0, mm2 |
---|
2507 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2508 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2509 | pxor mm1, mm1 |
---|
2510 | pand mm3, mm7 |
---|
2511 | pandn mm7, mm0 |
---|
2512 | paddw mm7, mm3 |
---|
2513 | pxor mm0, mm0 |
---|
2514 | packuswb mm7, mm1 |
---|
2515 | movq mm3, [esi + ebx] // load c=Prior(x-bpp) |
---|
2516 | pand mm7, ActiveMask |
---|
2517 | movq mm2, mm3 // load b=Prior(x) step 1 |
---|
2518 | paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) |
---|
2519 | punpcklbw mm3, mm0 // Unpack High bytes of c |
---|
2520 | movq [edi + ebx], mm7 // write back updated value |
---|
2521 | movq mm1, mm7 // Now mm1 will be used as Raw(x-bpp) |
---|
2522 | // Now do Paeth for 2nd set of bytes (3-5) |
---|
2523 | psrlq mm2, ShiftBpp // load b=Prior(x) step 2 |
---|
2524 | punpcklbw mm1, mm0 // Unpack High bytes of a |
---|
2525 | pxor mm7, mm7 |
---|
2526 | punpcklbw mm2, mm0 // Unpack High bytes of b |
---|
2527 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2528 | movq mm5, mm1 |
---|
2529 | // pav = p - a = (a + b - c) - a = b - c |
---|
2530 | movq mm4, mm2 |
---|
2531 | psubw mm5, mm3 |
---|
2532 | psubw mm4, mm3 |
---|
2533 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = |
---|
2534 | // pav + pbv = pbv + pav |
---|
2535 | movq mm6, mm5 |
---|
2536 | paddw mm6, mm4 |
---|
2537 | |
---|
2538 | // pa = abs(p-a) = abs(pav) |
---|
2539 | // pb = abs(p-b) = abs(pbv) |
---|
2540 | // pc = abs(p-c) = abs(pcv) |
---|
2541 | pcmpgtw mm0, mm5 // Create mask pbv bytes < 0 |
---|
2542 | pcmpgtw mm7, mm4 // Create mask pav bytes < 0 |
---|
2543 | pand mm0, mm5 // Only pbv bytes < 0 in mm0 |
---|
2544 | pand mm7, mm4 // Only pav bytes < 0 in mm7 |
---|
2545 | psubw mm5, mm0 |
---|
2546 | psubw mm4, mm7 |
---|
2547 | psubw mm5, mm0 |
---|
2548 | psubw mm4, mm7 |
---|
2549 | pxor mm0, mm0 |
---|
2550 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2551 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2552 | psubw mm6, mm0 |
---|
2553 | // test pa <= pb |
---|
2554 | movq mm7, mm4 |
---|
2555 | psubw mm6, mm0 |
---|
2556 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2557 | movq mm0, mm7 |
---|
2558 | // use mm7 mask to merge pa & pb |
---|
2559 | pand mm5, mm7 |
---|
2560 | // use mm0 mask copy to merge a & b |
---|
2561 | pand mm2, mm0 |
---|
2562 | pandn mm7, mm4 |
---|
2563 | pandn mm0, mm1 |
---|
2564 | paddw mm7, mm5 |
---|
2565 | paddw mm0, mm2 |
---|
2566 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2567 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2568 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2569 | pand mm3, mm7 |
---|
2570 | pandn mm7, mm0 |
---|
2571 | pxor mm1, mm1 |
---|
2572 | paddw mm7, mm3 |
---|
2573 | pxor mm0, mm0 |
---|
2574 | packuswb mm7, mm1 |
---|
2575 | movq mm3, mm2 // load c=Prior(x-bpp) step 1 |
---|
2576 | pand mm7, ActiveMask |
---|
2577 | punpckhbw mm2, mm0 // Unpack High bytes of b |
---|
2578 | psllq mm7, ShiftBpp // Shift bytes to 2nd group of 3 bytes |
---|
2579 | // pav = p - a = (a + b - c) - a = b - c |
---|
2580 | movq mm4, mm2 |
---|
2581 | paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) |
---|
2582 | psllq mm3, ShiftBpp // load c=Prior(x-bpp) step 2 |
---|
2583 | movq [edi + ebx], mm7 // write back updated value |
---|
2584 | movq mm1, mm7 |
---|
2585 | punpckhbw mm3, mm0 // Unpack High bytes of c |
---|
2586 | psllq mm1, ShiftBpp // Shift bytes |
---|
2587 | // Now mm1 will be used as Raw(x-bpp) |
---|
2588 | // Now do Paeth for 3rd, and final, set of bytes (6-7) |
---|
2589 | pxor mm7, mm7 |
---|
2590 | punpckhbw mm1, mm0 // Unpack High bytes of a |
---|
2591 | psubw mm4, mm3 |
---|
2592 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2593 | movq mm5, mm1 |
---|
2594 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2595 | movq mm6, mm4 |
---|
2596 | psubw mm5, mm3 |
---|
2597 | pxor mm0, mm0 |
---|
2598 | paddw mm6, mm5 |
---|
2599 | |
---|
2600 | // pa = abs(p-a) = abs(pav) |
---|
2601 | // pb = abs(p-b) = abs(pbv) |
---|
2602 | // pc = abs(p-c) = abs(pcv) |
---|
2603 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2604 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2605 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2606 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2607 | psubw mm4, mm0 |
---|
2608 | psubw mm5, mm7 |
---|
2609 | psubw mm4, mm0 |
---|
2610 | psubw mm5, mm7 |
---|
2611 | pxor mm0, mm0 |
---|
2612 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2613 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2614 | psubw mm6, mm0 |
---|
2615 | // test pa <= pb |
---|
2616 | movq mm7, mm4 |
---|
2617 | psubw mm6, mm0 |
---|
2618 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2619 | movq mm0, mm7 |
---|
2620 | // use mm0 mask copy to merge a & b |
---|
2621 | pand mm2, mm0 |
---|
2622 | // use mm7 mask to merge pa & pb |
---|
2623 | pand mm5, mm7 |
---|
2624 | pandn mm0, mm1 |
---|
2625 | pandn mm7, mm4 |
---|
2626 | paddw mm0, mm2 |
---|
2627 | paddw mm7, mm5 |
---|
2628 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2629 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2630 | pand mm3, mm7 |
---|
2631 | pandn mm7, mm0 |
---|
2632 | paddw mm7, mm3 |
---|
2633 | pxor mm1, mm1 |
---|
2634 | packuswb mm1, mm7 |
---|
2635 | // Step ebx to next set of 8 bytes and repeat loop til done |
---|
2636 | add ebx, 8 |
---|
2637 | pand mm1, ActiveMaskEnd |
---|
2638 | paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) |
---|
2639 | |
---|
2640 | cmp ebx, MMXLength |
---|
2641 | pxor mm0, mm0 // pxor does not affect flags |
---|
2642 | movq [edi + ebx - 8], mm1 // write back updated value |
---|
2643 | // mm1 will be used as Raw(x-bpp) next loop |
---|
2644 | // mm3 ready to be used as Prior(x-bpp) next loop |
---|
2645 | jb dpth3lp |
---|
2646 | } // end _asm block |
---|
2647 | } |
---|
2648 | break; |
---|
2649 | |
---|
2650 | case 6: |
---|
2651 | case 7: |
---|
2652 | case 5: |
---|
2653 | { |
---|
2654 | ActiveMask.use = 0x00000000ffffffff; |
---|
2655 | ActiveMask2.use = 0xffffffff00000000; |
---|
2656 | ShiftBpp.use = bpp << 3; // == bpp * 8 |
---|
2657 | ShiftRem.use = 64 - ShiftBpp.use; |
---|
2658 | _asm |
---|
2659 | { |
---|
2660 | mov ebx, diff |
---|
2661 | mov edi, row |
---|
2662 | mov esi, prev_row |
---|
2663 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2664 | movq mm1, [edi+ebx-8] |
---|
2665 | pxor mm0, mm0 |
---|
2666 | dpth6lp: |
---|
2667 | // Must shift to position Raw(x-bpp) data |
---|
2668 | psrlq mm1, ShiftRem |
---|
2669 | // Do first set of 4 bytes |
---|
2670 | movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes |
---|
2671 | punpcklbw mm1, mm0 // Unpack Low bytes of a |
---|
2672 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2673 | punpcklbw mm2, mm0 // Unpack Low bytes of b |
---|
2674 | // Must shift to position Prior(x-bpp) data |
---|
2675 | psrlq mm3, ShiftRem |
---|
2676 | // pav = p - a = (a + b - c) - a = b - c |
---|
2677 | movq mm4, mm2 |
---|
2678 | punpcklbw mm3, mm0 // Unpack Low bytes of c |
---|
2679 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2680 | movq mm5, mm1 |
---|
2681 | psubw mm4, mm3 |
---|
2682 | pxor mm7, mm7 |
---|
2683 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2684 | movq mm6, mm4 |
---|
2685 | psubw mm5, mm3 |
---|
2686 | // pa = abs(p-a) = abs(pav) |
---|
2687 | // pb = abs(p-b) = abs(pbv) |
---|
2688 | // pc = abs(p-c) = abs(pcv) |
---|
2689 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2690 | paddw mm6, mm5 |
---|
2691 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2692 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2693 | psubw mm4, mm0 |
---|
2694 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2695 | psubw mm4, mm0 |
---|
2696 | psubw mm5, mm7 |
---|
2697 | pxor mm0, mm0 |
---|
2698 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2699 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2700 | psubw mm5, mm7 |
---|
2701 | psubw mm6, mm0 |
---|
2702 | // test pa <= pb |
---|
2703 | movq mm7, mm4 |
---|
2704 | psubw mm6, mm0 |
---|
2705 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2706 | movq mm0, mm7 |
---|
2707 | // use mm7 mask to merge pa & pb |
---|
2708 | pand mm5, mm7 |
---|
2709 | // use mm0 mask copy to merge a & b |
---|
2710 | pand mm2, mm0 |
---|
2711 | pandn mm7, mm4 |
---|
2712 | pandn mm0, mm1 |
---|
2713 | paddw mm7, mm5 |
---|
2714 | paddw mm0, mm2 |
---|
2715 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2716 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2717 | pxor mm1, mm1 |
---|
2718 | pand mm3, mm7 |
---|
2719 | pandn mm7, mm0 |
---|
2720 | paddw mm7, mm3 |
---|
2721 | pxor mm0, mm0 |
---|
2722 | packuswb mm7, mm1 |
---|
2723 | movq mm3, [esi + ebx - 8] // load c=Prior(x-bpp) |
---|
2724 | pand mm7, ActiveMask |
---|
2725 | psrlq mm3, ShiftRem |
---|
2726 | movq mm2, [esi + ebx] // load b=Prior(x) step 1 |
---|
2727 | paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) |
---|
2728 | movq mm6, mm2 |
---|
2729 | movq [edi + ebx], mm7 // write back updated value |
---|
2730 | movq mm1, [edi+ebx-8] |
---|
2731 | psllq mm6, ShiftBpp |
---|
2732 | movq mm5, mm7 |
---|
2733 | psrlq mm1, ShiftRem |
---|
2734 | por mm3, mm6 |
---|
2735 | psllq mm5, ShiftBpp |
---|
2736 | punpckhbw mm3, mm0 // Unpack High bytes of c |
---|
2737 | por mm1, mm5 |
---|
2738 | // Do second set of 4 bytes |
---|
2739 | punpckhbw mm2, mm0 // Unpack High bytes of b |
---|
2740 | punpckhbw mm1, mm0 // Unpack High bytes of a |
---|
2741 | // pav = p - a = (a + b - c) - a = b - c |
---|
2742 | movq mm4, mm2 |
---|
2743 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2744 | movq mm5, mm1 |
---|
2745 | psubw mm4, mm3 |
---|
2746 | pxor mm7, mm7 |
---|
2747 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2748 | movq mm6, mm4 |
---|
2749 | psubw mm5, mm3 |
---|
2750 | // pa = abs(p-a) = abs(pav) |
---|
2751 | // pb = abs(p-b) = abs(pbv) |
---|
2752 | // pc = abs(p-c) = abs(pcv) |
---|
2753 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2754 | paddw mm6, mm5 |
---|
2755 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2756 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2757 | psubw mm4, mm0 |
---|
2758 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2759 | psubw mm4, mm0 |
---|
2760 | psubw mm5, mm7 |
---|
2761 | pxor mm0, mm0 |
---|
2762 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2763 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2764 | psubw mm5, mm7 |
---|
2765 | psubw mm6, mm0 |
---|
2766 | // test pa <= pb |
---|
2767 | movq mm7, mm4 |
---|
2768 | psubw mm6, mm0 |
---|
2769 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2770 | movq mm0, mm7 |
---|
2771 | // use mm7 mask to merge pa & pb |
---|
2772 | pand mm5, mm7 |
---|
2773 | // use mm0 mask copy to merge a & b |
---|
2774 | pand mm2, mm0 |
---|
2775 | pandn mm7, mm4 |
---|
2776 | pandn mm0, mm1 |
---|
2777 | paddw mm7, mm5 |
---|
2778 | paddw mm0, mm2 |
---|
2779 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2780 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2781 | pxor mm1, mm1 |
---|
2782 | pand mm3, mm7 |
---|
2783 | pandn mm7, mm0 |
---|
2784 | pxor mm1, mm1 |
---|
2785 | paddw mm7, mm3 |
---|
2786 | pxor mm0, mm0 |
---|
2787 | // Step ex to next set of 8 bytes and repeat loop til done |
---|
2788 | add ebx, 8 |
---|
2789 | packuswb mm1, mm7 |
---|
2790 | paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) |
---|
2791 | cmp ebx, MMXLength |
---|
2792 | movq [edi + ebx - 8], mm1 // write back updated value |
---|
2793 | // mm1 will be used as Raw(x-bpp) next loop |
---|
2794 | jb dpth6lp |
---|
2795 | } // end _asm block |
---|
2796 | } |
---|
2797 | break; |
---|
2798 | |
---|
2799 | case 4: |
---|
2800 | { |
---|
2801 | ActiveMask.use = 0x00000000ffffffff; |
---|
2802 | _asm { |
---|
2803 | mov ebx, diff |
---|
2804 | mov edi, row |
---|
2805 | mov esi, prev_row |
---|
2806 | pxor mm0, mm0 |
---|
2807 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2808 | movq mm1, [edi+ebx-8] // Only time should need to read |
---|
2809 | // a=Raw(x-bpp) bytes |
---|
2810 | dpth4lp: |
---|
2811 | // Do first set of 4 bytes |
---|
2812 | movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes |
---|
2813 | punpckhbw mm1, mm0 // Unpack Low bytes of a |
---|
2814 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2815 | punpcklbw mm2, mm0 // Unpack High bytes of b |
---|
2816 | // pav = p - a = (a + b - c) - a = b - c |
---|
2817 | movq mm4, mm2 |
---|
2818 | punpckhbw mm3, mm0 // Unpack High bytes of c |
---|
2819 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2820 | movq mm5, mm1 |
---|
2821 | psubw mm4, mm3 |
---|
2822 | pxor mm7, mm7 |
---|
2823 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2824 | movq mm6, mm4 |
---|
2825 | psubw mm5, mm3 |
---|
2826 | // pa = abs(p-a) = abs(pav) |
---|
2827 | // pb = abs(p-b) = abs(pbv) |
---|
2828 | // pc = abs(p-c) = abs(pcv) |
---|
2829 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2830 | paddw mm6, mm5 |
---|
2831 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2832 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2833 | psubw mm4, mm0 |
---|
2834 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2835 | psubw mm4, mm0 |
---|
2836 | psubw mm5, mm7 |
---|
2837 | pxor mm0, mm0 |
---|
2838 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2839 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2840 | psubw mm5, mm7 |
---|
2841 | psubw mm6, mm0 |
---|
2842 | // test pa <= pb |
---|
2843 | movq mm7, mm4 |
---|
2844 | psubw mm6, mm0 |
---|
2845 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2846 | movq mm0, mm7 |
---|
2847 | // use mm7 mask to merge pa & pb |
---|
2848 | pand mm5, mm7 |
---|
2849 | // use mm0 mask copy to merge a & b |
---|
2850 | pand mm2, mm0 |
---|
2851 | pandn mm7, mm4 |
---|
2852 | pandn mm0, mm1 |
---|
2853 | paddw mm7, mm5 |
---|
2854 | paddw mm0, mm2 |
---|
2855 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2856 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2857 | pxor mm1, mm1 |
---|
2858 | pand mm3, mm7 |
---|
2859 | pandn mm7, mm0 |
---|
2860 | paddw mm7, mm3 |
---|
2861 | pxor mm0, mm0 |
---|
2862 | packuswb mm7, mm1 |
---|
2863 | movq mm3, [esi + ebx] // load c=Prior(x-bpp) |
---|
2864 | pand mm7, ActiveMask |
---|
2865 | movq mm2, mm3 // load b=Prior(x) step 1 |
---|
2866 | paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) |
---|
2867 | punpcklbw mm3, mm0 // Unpack High bytes of c |
---|
2868 | movq [edi + ebx], mm7 // write back updated value |
---|
2869 | movq mm1, mm7 // Now mm1 will be used as Raw(x-bpp) |
---|
2870 | // Do second set of 4 bytes |
---|
2871 | punpckhbw mm2, mm0 // Unpack Low bytes of b |
---|
2872 | punpcklbw mm1, mm0 // Unpack Low bytes of a |
---|
2873 | // pav = p - a = (a + b - c) - a = b - c |
---|
2874 | movq mm4, mm2 |
---|
2875 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2876 | movq mm5, mm1 |
---|
2877 | psubw mm4, mm3 |
---|
2878 | pxor mm7, mm7 |
---|
2879 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2880 | movq mm6, mm4 |
---|
2881 | psubw mm5, mm3 |
---|
2882 | // pa = abs(p-a) = abs(pav) |
---|
2883 | // pb = abs(p-b) = abs(pbv) |
---|
2884 | // pc = abs(p-c) = abs(pcv) |
---|
2885 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2886 | paddw mm6, mm5 |
---|
2887 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2888 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2889 | psubw mm4, mm0 |
---|
2890 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2891 | psubw mm4, mm0 |
---|
2892 | psubw mm5, mm7 |
---|
2893 | pxor mm0, mm0 |
---|
2894 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2895 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2896 | psubw mm5, mm7 |
---|
2897 | psubw mm6, mm0 |
---|
2898 | // test pa <= pb |
---|
2899 | movq mm7, mm4 |
---|
2900 | psubw mm6, mm0 |
---|
2901 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2902 | movq mm0, mm7 |
---|
2903 | // use mm7 mask to merge pa & pb |
---|
2904 | pand mm5, mm7 |
---|
2905 | // use mm0 mask copy to merge a & b |
---|
2906 | pand mm2, mm0 |
---|
2907 | pandn mm7, mm4 |
---|
2908 | pandn mm0, mm1 |
---|
2909 | paddw mm7, mm5 |
---|
2910 | paddw mm0, mm2 |
---|
2911 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2912 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2913 | pxor mm1, mm1 |
---|
2914 | pand mm3, mm7 |
---|
2915 | pandn mm7, mm0 |
---|
2916 | pxor mm1, mm1 |
---|
2917 | paddw mm7, mm3 |
---|
2918 | pxor mm0, mm0 |
---|
2919 | // Step ex to next set of 8 bytes and repeat loop til done |
---|
2920 | add ebx, 8 |
---|
2921 | packuswb mm1, mm7 |
---|
2922 | paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) |
---|
2923 | cmp ebx, MMXLength |
---|
2924 | movq [edi + ebx - 8], mm1 // write back updated value |
---|
2925 | // mm1 will be used as Raw(x-bpp) next loop |
---|
2926 | jb dpth4lp |
---|
2927 | } // end _asm block |
---|
2928 | } |
---|
2929 | break; |
---|
2930 | case 8: // bpp == 8 |
---|
2931 | { |
---|
2932 | ActiveMask.use = 0x00000000ffffffff; |
---|
2933 | _asm { |
---|
2934 | mov ebx, diff |
---|
2935 | mov edi, row |
---|
2936 | mov esi, prev_row |
---|
2937 | pxor mm0, mm0 |
---|
2938 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
2939 | movq mm1, [edi+ebx-8] // Only time should need to read |
---|
2940 | // a=Raw(x-bpp) bytes |
---|
2941 | dpth8lp: |
---|
2942 | // Do first set of 4 bytes |
---|
2943 | movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes |
---|
2944 | punpcklbw mm1, mm0 // Unpack Low bytes of a |
---|
2945 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2946 | punpcklbw mm2, mm0 // Unpack Low bytes of b |
---|
2947 | // pav = p - a = (a + b - c) - a = b - c |
---|
2948 | movq mm4, mm2 |
---|
2949 | punpcklbw mm3, mm0 // Unpack Low bytes of c |
---|
2950 | // pbv = p - b = (a + b - c) - b = a - c |
---|
2951 | movq mm5, mm1 |
---|
2952 | psubw mm4, mm3 |
---|
2953 | pxor mm7, mm7 |
---|
2954 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
2955 | movq mm6, mm4 |
---|
2956 | psubw mm5, mm3 |
---|
2957 | // pa = abs(p-a) = abs(pav) |
---|
2958 | // pb = abs(p-b) = abs(pbv) |
---|
2959 | // pc = abs(p-c) = abs(pcv) |
---|
2960 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
2961 | paddw mm6, mm5 |
---|
2962 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
2963 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
2964 | psubw mm4, mm0 |
---|
2965 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
2966 | psubw mm4, mm0 |
---|
2967 | psubw mm5, mm7 |
---|
2968 | pxor mm0, mm0 |
---|
2969 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
2970 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
2971 | psubw mm5, mm7 |
---|
2972 | psubw mm6, mm0 |
---|
2973 | // test pa <= pb |
---|
2974 | movq mm7, mm4 |
---|
2975 | psubw mm6, mm0 |
---|
2976 | pcmpgtw mm7, mm5 // pa > pb? |
---|
2977 | movq mm0, mm7 |
---|
2978 | // use mm7 mask to merge pa & pb |
---|
2979 | pand mm5, mm7 |
---|
2980 | // use mm0 mask copy to merge a & b |
---|
2981 | pand mm2, mm0 |
---|
2982 | pandn mm7, mm4 |
---|
2983 | pandn mm0, mm1 |
---|
2984 | paddw mm7, mm5 |
---|
2985 | paddw mm0, mm2 |
---|
2986 | // test ((pa <= pb)? pa:pb) <= pc |
---|
2987 | pcmpgtw mm7, mm6 // pab > pc? |
---|
2988 | pxor mm1, mm1 |
---|
2989 | pand mm3, mm7 |
---|
2990 | pandn mm7, mm0 |
---|
2991 | paddw mm7, mm3 |
---|
2992 | pxor mm0, mm0 |
---|
2993 | packuswb mm7, mm1 |
---|
2994 | movq mm3, [esi+ebx-8] // read c=Prior(x-bpp) bytes |
---|
2995 | pand mm7, ActiveMask |
---|
2996 | movq mm2, [esi + ebx] // load b=Prior(x) |
---|
2997 | paddb mm7, [edi + ebx] // add Paeth predictor with Raw(x) |
---|
2998 | punpckhbw mm3, mm0 // Unpack High bytes of c |
---|
2999 | movq [edi + ebx], mm7 // write back updated value |
---|
3000 | movq mm1, [edi+ebx-8] // read a=Raw(x-bpp) bytes |
---|
3001 | |
---|
3002 | // Do second set of 4 bytes |
---|
3003 | punpckhbw mm2, mm0 // Unpack High bytes of b |
---|
3004 | punpckhbw mm1, mm0 // Unpack High bytes of a |
---|
3005 | // pav = p - a = (a + b - c) - a = b - c |
---|
3006 | movq mm4, mm2 |
---|
3007 | // pbv = p - b = (a + b - c) - b = a - c |
---|
3008 | movq mm5, mm1 |
---|
3009 | psubw mm4, mm3 |
---|
3010 | pxor mm7, mm7 |
---|
3011 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
3012 | movq mm6, mm4 |
---|
3013 | psubw mm5, mm3 |
---|
3014 | // pa = abs(p-a) = abs(pav) |
---|
3015 | // pb = abs(p-b) = abs(pbv) |
---|
3016 | // pc = abs(p-c) = abs(pcv) |
---|
3017 | pcmpgtw mm0, mm4 // Create mask pav bytes < 0 |
---|
3018 | paddw mm6, mm5 |
---|
3019 | pand mm0, mm4 // Only pav bytes < 0 in mm7 |
---|
3020 | pcmpgtw mm7, mm5 // Create mask pbv bytes < 0 |
---|
3021 | psubw mm4, mm0 |
---|
3022 | pand mm7, mm5 // Only pbv bytes < 0 in mm0 |
---|
3023 | psubw mm4, mm0 |
---|
3024 | psubw mm5, mm7 |
---|
3025 | pxor mm0, mm0 |
---|
3026 | pcmpgtw mm0, mm6 // Create mask pcv bytes < 0 |
---|
3027 | pand mm0, mm6 // Only pav bytes < 0 in mm7 |
---|
3028 | psubw mm5, mm7 |
---|
3029 | psubw mm6, mm0 |
---|
3030 | // test pa <= pb |
---|
3031 | movq mm7, mm4 |
---|
3032 | psubw mm6, mm0 |
---|
3033 | pcmpgtw mm7, mm5 // pa > pb? |
---|
3034 | movq mm0, mm7 |
---|
3035 | // use mm7 mask to merge pa & pb |
---|
3036 | pand mm5, mm7 |
---|
3037 | // use mm0 mask copy to merge a & b |
---|
3038 | pand mm2, mm0 |
---|
3039 | pandn mm7, mm4 |
---|
3040 | pandn mm0, mm1 |
---|
3041 | paddw mm7, mm5 |
---|
3042 | paddw mm0, mm2 |
---|
3043 | // test ((pa <= pb)? pa:pb) <= pc |
---|
3044 | pcmpgtw mm7, mm6 // pab > pc? |
---|
3045 | pxor mm1, mm1 |
---|
3046 | pand mm3, mm7 |
---|
3047 | pandn mm7, mm0 |
---|
3048 | pxor mm1, mm1 |
---|
3049 | paddw mm7, mm3 |
---|
3050 | pxor mm0, mm0 |
---|
3051 | // Step ex to next set of 8 bytes and repeat loop til done |
---|
3052 | add ebx, 8 |
---|
3053 | packuswb mm1, mm7 |
---|
3054 | paddb mm1, [edi + ebx - 8] // add Paeth predictor with Raw(x) |
---|
3055 | cmp ebx, MMXLength |
---|
3056 | movq [edi + ebx - 8], mm1 // write back updated value |
---|
3057 | // mm1 will be used as Raw(x-bpp) next loop |
---|
3058 | jb dpth8lp |
---|
3059 | } // end _asm block |
---|
3060 | } |
---|
3061 | break; |
---|
3062 | |
---|
3063 | case 1: // bpp = 1 |
---|
3064 | case 2: // bpp = 2 |
---|
3065 | default: // bpp > 8 |
---|
3066 | { |
---|
3067 | _asm { |
---|
3068 | mov ebx, diff |
---|
3069 | cmp ebx, FullLength |
---|
3070 | jnb dpthdend |
---|
3071 | mov edi, row |
---|
3072 | mov esi, prev_row |
---|
3073 | // Do Paeth decode for remaining bytes |
---|
3074 | mov edx, ebx |
---|
3075 | xor ecx, ecx // zero ecx before using cl & cx in loop below |
---|
3076 | sub edx, bpp // Set edx = ebx - bpp |
---|
3077 | dpthdlp: |
---|
3078 | xor eax, eax |
---|
3079 | // pav = p - a = (a + b - c) - a = b - c |
---|
3080 | mov al, [esi + ebx] // load Prior(x) into al |
---|
3081 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3082 | sub eax, ecx // subtract Prior(x-bpp) |
---|
3083 | mov patemp, eax // Save pav for later use |
---|
3084 | xor eax, eax |
---|
3085 | // pbv = p - b = (a + b - c) - b = a - c |
---|
3086 | mov al, [edi + edx] // load Raw(x-bpp) into al |
---|
3087 | sub eax, ecx // subtract Prior(x-bpp) |
---|
3088 | mov ecx, eax |
---|
3089 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
3090 | add eax, patemp // pcv = pav + pbv |
---|
3091 | // pc = abs(pcv) |
---|
3092 | test eax, 0x80000000 |
---|
3093 | jz dpthdpca |
---|
3094 | neg eax // reverse sign of neg values |
---|
3095 | dpthdpca: |
---|
3096 | mov pctemp, eax // save pc for later use |
---|
3097 | // pb = abs(pbv) |
---|
3098 | test ecx, 0x80000000 |
---|
3099 | jz dpthdpba |
---|
3100 | neg ecx // reverse sign of neg values |
---|
3101 | dpthdpba: |
---|
3102 | mov pbtemp, ecx // save pb for later use |
---|
3103 | // pa = abs(pav) |
---|
3104 | mov eax, patemp |
---|
3105 | test eax, 0x80000000 |
---|
3106 | jz dpthdpaa |
---|
3107 | neg eax // reverse sign of neg values |
---|
3108 | dpthdpaa: |
---|
3109 | mov patemp, eax // save pa for later use |
---|
3110 | // test if pa <= pb |
---|
3111 | cmp eax, ecx |
---|
3112 | jna dpthdabb |
---|
3113 | // pa > pb; now test if pb <= pc |
---|
3114 | cmp ecx, pctemp |
---|
3115 | jna dpthdbbc |
---|
3116 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
3117 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3118 | jmp dpthdpaeth |
---|
3119 | dpthdbbc: |
---|
3120 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
---|
3121 | mov cl, [esi + ebx] // load Prior(x) into cl |
---|
3122 | jmp dpthdpaeth |
---|
3123 | dpthdabb: |
---|
3124 | // pa <= pb; now test if pa <= pc |
---|
3125 | cmp eax, pctemp |
---|
3126 | jna dpthdabc |
---|
3127 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
3128 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3129 | jmp dpthdpaeth |
---|
3130 | dpthdabc: |
---|
3131 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
---|
3132 | mov cl, [edi + edx] // load Raw(x-bpp) into cl |
---|
3133 | dpthdpaeth: |
---|
3134 | inc ebx |
---|
3135 | inc edx |
---|
3136 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
---|
3137 | add [edi + ebx - 1], cl |
---|
3138 | cmp ebx, FullLength |
---|
3139 | jb dpthdlp |
---|
3140 | dpthdend: |
---|
3141 | } // end _asm block |
---|
3142 | } |
---|
3143 | return; // No need to go further with this one |
---|
3144 | } // end switch ( bpp ) |
---|
3145 | _asm |
---|
3146 | { |
---|
3147 | // MMX acceleration complete now do clean-up |
---|
3148 | // Check if any remaining bytes left to decode |
---|
3149 | mov ebx, MMXLength |
---|
3150 | cmp ebx, FullLength |
---|
3151 | jnb dpthend |
---|
3152 | mov edi, row |
---|
3153 | mov esi, prev_row |
---|
3154 | // Do Paeth decode for remaining bytes |
---|
3155 | mov edx, ebx |
---|
3156 | xor ecx, ecx // zero ecx before using cl & cx in loop below |
---|
3157 | sub edx, bpp // Set edx = ebx - bpp |
---|
3158 | dpthlp2: |
---|
3159 | xor eax, eax |
---|
3160 | // pav = p - a = (a + b - c) - a = b - c |
---|
3161 | mov al, [esi + ebx] // load Prior(x) into al |
---|
3162 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3163 | sub eax, ecx // subtract Prior(x-bpp) |
---|
3164 | mov patemp, eax // Save pav for later use |
---|
3165 | xor eax, eax |
---|
3166 | // pbv = p - b = (a + b - c) - b = a - c |
---|
3167 | mov al, [edi + edx] // load Raw(x-bpp) into al |
---|
3168 | sub eax, ecx // subtract Prior(x-bpp) |
---|
3169 | mov ecx, eax |
---|
3170 | // pcv = p - c = (a + b - c) -c = (a - c) + (b - c) = pav + pbv |
---|
3171 | add eax, patemp // pcv = pav + pbv |
---|
3172 | // pc = abs(pcv) |
---|
3173 | test eax, 0x80000000 |
---|
3174 | jz dpthpca2 |
---|
3175 | neg eax // reverse sign of neg values |
---|
3176 | dpthpca2: |
---|
3177 | mov pctemp, eax // save pc for later use |
---|
3178 | // pb = abs(pbv) |
---|
3179 | test ecx, 0x80000000 |
---|
3180 | jz dpthpba2 |
---|
3181 | neg ecx // reverse sign of neg values |
---|
3182 | dpthpba2: |
---|
3183 | mov pbtemp, ecx // save pb for later use |
---|
3184 | // pa = abs(pav) |
---|
3185 | mov eax, patemp |
---|
3186 | test eax, 0x80000000 |
---|
3187 | jz dpthpaa2 |
---|
3188 | neg eax // reverse sign of neg values |
---|
3189 | dpthpaa2: |
---|
3190 | mov patemp, eax // save pa for later use |
---|
3191 | // test if pa <= pb |
---|
3192 | cmp eax, ecx |
---|
3193 | jna dpthabb2 |
---|
3194 | // pa > pb; now test if pb <= pc |
---|
3195 | cmp ecx, pctemp |
---|
3196 | jna dpthbbc2 |
---|
3197 | // pb > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
3198 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3199 | jmp dpthpaeth2 |
---|
3200 | dpthbbc2: |
---|
3201 | // pb <= pc; Raw(x) = Paeth(x) + Prior(x) |
---|
3202 | mov cl, [esi + ebx] // load Prior(x) into cl |
---|
3203 | jmp dpthpaeth2 |
---|
3204 | dpthabb2: |
---|
3205 | // pa <= pb; now test if pa <= pc |
---|
3206 | cmp eax, pctemp |
---|
3207 | jna dpthabc2 |
---|
3208 | // pa > pc; Raw(x) = Paeth(x) + Prior(x-bpp) |
---|
3209 | mov cl, [esi + edx] // load Prior(x-bpp) into cl |
---|
3210 | jmp dpthpaeth2 |
---|
3211 | dpthabc2: |
---|
3212 | // pa <= pc; Raw(x) = Paeth(x) + Raw(x-bpp) |
---|
3213 | mov cl, [edi + edx] // load Raw(x-bpp) into cl |
---|
3214 | dpthpaeth2: |
---|
3215 | inc ebx |
---|
3216 | inc edx |
---|
3217 | // Raw(x) = (Paeth(x) + Paeth_Predictor( a, b, c )) mod 256 |
---|
3218 | add [edi + ebx - 1], cl |
---|
3219 | cmp ebx, FullLength |
---|
3220 | jb dpthlp2 |
---|
3221 | dpthend: |
---|
3222 | emms // End MMX instructions; prep for possible FP instrs. |
---|
3223 | } // end _asm block |
---|
3224 | } |
---|
3225 | |
---|
3226 | // Optimized code for PNG Sub filter decoder |
---|
3227 | void /* PRIVATE */ |
---|
3228 | png_read_filter_row_mmx_sub(png_row_infop row_info, png_bytep row) |
---|
3229 | { |
---|
3230 | //int test; |
---|
3231 | int bpp; |
---|
3232 | png_uint_32 FullLength; |
---|
3233 | png_uint_32 MMXLength; |
---|
3234 | int diff; |
---|
3235 | |
---|
3236 | bpp = (row_info->pixel_depth + 7) >> 3; // Get # bytes per pixel |
---|
3237 | FullLength = row_info->rowbytes - bpp; // # of bytes to filter |
---|
3238 | _asm { |
---|
3239 | mov edi, row |
---|
3240 | mov esi, edi // lp = row |
---|
3241 | add edi, bpp // rp = row + bpp |
---|
3242 | xor eax, eax |
---|
3243 | // get # of bytes to alignment |
---|
3244 | mov diff, edi // take start of row |
---|
3245 | add diff, 0xf // add 7 + 8 to incr past |
---|
3246 | // alignment boundary |
---|
3247 | xor ebx, ebx |
---|
3248 | and diff, 0xfffffff8 // mask to alignment boundary |
---|
3249 | sub diff, edi // subtract from start ==> value |
---|
3250 | // ebx at alignment |
---|
3251 | jz dsubgo |
---|
3252 | // fix alignment |
---|
3253 | dsublp1: |
---|
3254 | mov al, [esi+ebx] |
---|
3255 | add [edi+ebx], al |
---|
3256 | inc ebx |
---|
3257 | cmp ebx, diff |
---|
3258 | jb dsublp1 |
---|
3259 | dsubgo: |
---|
3260 | mov ecx, FullLength |
---|
3261 | mov edx, ecx |
---|
3262 | sub edx, ebx // subtract alignment fix |
---|
3263 | and edx, 0x00000007 // calc bytes over mult of 8 |
---|
3264 | sub ecx, edx // drop over bytes from length |
---|
3265 | mov MMXLength, ecx |
---|
3266 | } // end _asm block |
---|
3267 | |
---|
3268 | // Now do the math for the rest of the row |
---|
3269 | switch ( bpp ) |
---|
3270 | { |
---|
3271 | case 3: |
---|
3272 | { |
---|
3273 | ActiveMask.use = 0x0000ffffff000000; |
---|
3274 | ShiftBpp.use = 24; // == 3 * 8 |
---|
3275 | ShiftRem.use = 40; // == 64 - 24 |
---|
3276 | _asm { |
---|
3277 | mov edi, row |
---|
3278 | movq mm7, ActiveMask // Load ActiveMask for 2nd active byte group |
---|
3279 | mov esi, edi // lp = row |
---|
3280 | add edi, bpp // rp = row + bpp |
---|
3281 | movq mm6, mm7 |
---|
3282 | mov ebx, diff |
---|
3283 | psllq mm6, ShiftBpp // Move mask in mm6 to cover 3rd active |
---|
3284 | // byte group |
---|
3285 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
3286 | movq mm1, [edi+ebx-8] |
---|
3287 | dsub3lp: |
---|
3288 | psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes |
---|
3289 | // no need for mask; shift clears inactive bytes |
---|
3290 | // Add 1st active group |
---|
3291 | movq mm0, [edi+ebx] |
---|
3292 | paddb mm0, mm1 |
---|
3293 | // Add 2nd active group |
---|
3294 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3295 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3296 | pand mm1, mm7 // mask to use only 2nd active group |
---|
3297 | paddb mm0, mm1 |
---|
3298 | // Add 3rd active group |
---|
3299 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3300 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3301 | pand mm1, mm6 // mask to use only 3rd active group |
---|
3302 | add ebx, 8 |
---|
3303 | paddb mm0, mm1 |
---|
3304 | cmp ebx, MMXLength |
---|
3305 | movq [edi+ebx-8], mm0 // Write updated Raws back to array |
---|
3306 | // Prep for doing 1st add at top of loop |
---|
3307 | movq mm1, mm0 |
---|
3308 | jb dsub3lp |
---|
3309 | } // end _asm block |
---|
3310 | } |
---|
3311 | break; |
---|
3312 | |
---|
3313 | case 1: |
---|
3314 | { |
---|
3315 | // Placed here just in case this is a duplicate of the |
---|
3316 | // non-MMX code for the SUB filter in png_read_filter_row below |
---|
3317 | // |
---|
3318 | // png_bytep rp; |
---|
3319 | // png_bytep lp; |
---|
3320 | // png_uint_32 i; |
---|
3321 | // bpp = (row_info->pixel_depth + 7) >> 3; |
---|
3322 | // for (i = (png_uint_32)bpp, rp = row + bpp, lp = row; |
---|
3323 | // i < row_info->rowbytes; i++, rp++, lp++) |
---|
3324 | // { |
---|
3325 | // *rp = (png_byte)(((int)(*rp) + (int)(*lp)) & 0xff); |
---|
3326 | // } |
---|
3327 | _asm { |
---|
3328 | mov ebx, diff |
---|
3329 | mov edi, row |
---|
3330 | cmp ebx, FullLength |
---|
3331 | jnb dsub1end |
---|
3332 | mov esi, edi // lp = row |
---|
3333 | xor eax, eax |
---|
3334 | add edi, bpp // rp = row + bpp |
---|
3335 | dsub1lp: |
---|
3336 | mov al, [esi+ebx] |
---|
3337 | add [edi+ebx], al |
---|
3338 | inc ebx |
---|
3339 | cmp ebx, FullLength |
---|
3340 | jb dsub1lp |
---|
3341 | dsub1end: |
---|
3342 | } // end _asm block |
---|
3343 | } |
---|
3344 | return; |
---|
3345 | |
---|
3346 | case 6: |
---|
3347 | case 7: |
---|
3348 | case 4: |
---|
3349 | case 5: |
---|
3350 | { |
---|
3351 | ShiftBpp.use = bpp << 3; |
---|
3352 | ShiftRem.use = 64 - ShiftBpp.use; |
---|
3353 | _asm { |
---|
3354 | mov edi, row |
---|
3355 | mov ebx, diff |
---|
3356 | mov esi, edi // lp = row |
---|
3357 | add edi, bpp // rp = row + bpp |
---|
3358 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
3359 | movq mm1, [edi+ebx-8] |
---|
3360 | dsub4lp: |
---|
3361 | psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes |
---|
3362 | // no need for mask; shift clears inactive bytes |
---|
3363 | movq mm0, [edi+ebx] |
---|
3364 | paddb mm0, mm1 |
---|
3365 | // Add 2nd active group |
---|
3366 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3367 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3368 | // there is no need for any mask |
---|
3369 | // since shift clears inactive bits/bytes |
---|
3370 | add ebx, 8 |
---|
3371 | paddb mm0, mm1 |
---|
3372 | cmp ebx, MMXLength |
---|
3373 | movq [edi+ebx-8], mm0 |
---|
3374 | movq mm1, mm0 // Prep for doing 1st add at top of loop |
---|
3375 | jb dsub4lp |
---|
3376 | } // end _asm block |
---|
3377 | } |
---|
3378 | break; |
---|
3379 | |
---|
3380 | case 2: |
---|
3381 | { |
---|
3382 | ActiveMask.use = 0x00000000ffff0000; |
---|
3383 | ShiftBpp.use = 16; // == 2 * 8 |
---|
3384 | ShiftRem.use = 48; // == 64 - 16 |
---|
3385 | _asm { |
---|
3386 | movq mm7, ActiveMask // Load ActiveMask for 2nd active byte group |
---|
3387 | mov ebx, diff |
---|
3388 | movq mm6, mm7 |
---|
3389 | mov edi, row |
---|
3390 | psllq mm6, ShiftBpp // Move mask in mm6 to cover 3rd active |
---|
3391 | // byte group |
---|
3392 | mov esi, edi // lp = row |
---|
3393 | movq mm5, mm6 |
---|
3394 | add edi, bpp // rp = row + bpp |
---|
3395 | psllq mm5, ShiftBpp // Move mask in mm5 to cover 4th active |
---|
3396 | // byte group |
---|
3397 | // PRIME the pump (load the first Raw(x-bpp) data set |
---|
3398 | movq mm1, [edi+ebx-8] |
---|
3399 | dsub2lp: |
---|
3400 | // Add 1st active group |
---|
3401 | psrlq mm1, ShiftRem // Shift data for adding 1st bpp bytes |
---|
3402 | // no need for mask; shift clears inactive |
---|
3403 | // bytes |
---|
3404 | movq mm0, [edi+ebx] |
---|
3405 | paddb mm0, mm1 |
---|
3406 | // Add 2nd active group |
---|
3407 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3408 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3409 | pand mm1, mm7 // mask to use only 2nd active group |
---|
3410 | paddb mm0, mm1 |
---|
3411 | // Add 3rd active group |
---|
3412 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3413 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3414 | pand mm1, mm6 // mask to use only 3rd active group |
---|
3415 | paddb mm0, mm1 |
---|
3416 | // Add 4th active group |
---|
3417 | movq mm1, mm0 // mov updated Raws to mm1 |
---|
3418 | psllq mm1, ShiftBpp // shift data to position correctly |
---|
3419 | pand mm1, mm5 // mask to use only 4th active group |
---|
3420 | add ebx, 8 |
---|
3421 | paddb mm0, mm1 |
---|
3422 | cmp ebx, MMXLength |
---|
3423 | movq [edi+ebx-8], mm0 // Write updated Raws back to array |
---|
3424 | movq mm1, mm0 // Prep for doing 1st add at top of loop |
---|
3425 | jb dsub2lp |
---|
3426 | } // end _asm block |
---|
3427 | } |
---|
3428 | break; |
---|
3429 | case 8: |
---|
3430 | { |
---|
3431 | _asm { |
---|
3432 | mov edi, row |
---|
3433 | mov ebx, diff |
---|
3434 | mov esi, edi // lp = row |
---|
3435 | add edi, bpp // rp = row + bpp |
---|
3436 | mov ecx, MMXLength |
---|
3437 | movq mm7, [edi+ebx-8] // PRIME the pump (load the first |
---|
3438 | // Raw(x-bpp) data set |
---|
3439 | and ecx, 0x0000003f // calc bytes over mult of 64 |
---|
3440 | dsub8lp: |
---|
3441 | movq mm0, [edi+ebx] // Load Sub(x) for 1st 8 bytes |
---|
3442 | paddb mm0, mm7 |
---|
3443 | movq mm1, [edi+ebx+8] // Load Sub(x) for 2nd 8 bytes |
---|
3444 | movq [edi+ebx], mm0 // Write Raw(x) for 1st 8 bytes |
---|
3445 | // Now mm0 will be used as Raw(x-bpp) for |
---|
3446 | // the 2nd group of 8 bytes. This will be |
---|
3447 | // repeated for each group of 8 bytes with |
---|
3448 | // the 8th group being used as the Raw(x-bpp) |
---|
3449 | // for the 1st group of the next loop. |
---|
3450 | paddb mm1, mm0 |
---|
3451 | movq mm2, [edi+ebx+16] // Load Sub(x) for 3rd 8 bytes |
---|
3452 | movq [edi+ebx+8], mm1 // Write Raw(x) for 2nd 8 bytes |
---|
3453 | paddb mm2, mm1 |
---|
3454 | movq mm3, [edi+ebx+24] // Load Sub(x) for 4th 8 bytes |
---|
3455 | movq [edi+ebx+16], mm2 // Write Raw(x) for 3rd 8 bytes |
---|
3456 | paddb mm3, mm2 |
---|
3457 | movq mm4, [edi+ebx+32] // Load Sub(x) for 5th 8 bytes |
---|
3458 | movq [edi+ebx+24], mm3 // Write Raw(x) for 4th 8 bytes |
---|
3459 | paddb mm4, mm3 |
---|
3460 | movq mm5, [edi+ebx+40] // Load Sub(x) for 6th 8 bytes |
---|
3461 | movq [edi+ebx+32], mm4 // Write Raw(x) for 5th 8 bytes |
---|
3462 | paddb mm5, mm4 |
---|
3463 | movq mm6, [edi+ebx+48] // Load Sub(x) for 7th 8 bytes |
---|
3464 | movq [edi+ebx+40], mm5 // Write Raw(x) for 6th 8 bytes |
---|
3465 | paddb mm6, mm5 |
---|
3466 | movq mm7, [edi+ebx+56] // Load Sub(x) for 8th 8 bytes |
---|
3467 | movq [edi+ebx+48], mm6 // Write Raw(x) for 7th 8 bytes |
---|
3468 | add ebx, 64 |
---|
3469 | paddb mm7, mm6 |
---|
3470 | cmp ebx, ecx |
---|
3471 | movq [edi+ebx-8], mm7 // Write Raw(x) for 8th 8 bytes |
---|
3472 | jb dsub8lp |
---|
3473 | cmp ebx, MMXLength |
---|
3474 | jnb dsub8lt8 |
---|
3475 | dsub8lpA: |
---|
3476 | movq mm0, [edi+ebx] |
---|
3477 | add ebx, 8 |
---|
3478 | paddb mm0, mm7 |
---|
3479 | cmp ebx, MMXLength |
---|
3480 | movq [edi+ebx-8], mm0 // use -8 to offset early add to ebx |
---|
3481 | movq mm7, mm0 // Move calculated Raw(x) data to mm1 to |
---|
3482 | // be the new Raw(x-bpp) for the next loop |
---|
3483 | jb dsub8lpA |
---|
3484 | dsub8lt8: |
---|
3485 | } // end _asm block |
---|
3486 | } |
---|
3487 | break; |
---|
3488 | |
---|
3489 | default: // bpp greater than 8 bytes |
---|
3490 | { |
---|
3491 | _asm { |
---|
3492 | mov ebx, diff |
---|
3493 | mov edi, row |
---|
3494 | mov esi, edi // lp = row |
---|
3495 | add edi, bpp // rp = row + bpp |
---|
3496 | dsubAlp: |
---|
3497 | movq mm0, [edi+ebx] |
---|
3498 | movq mm1, [esi+ebx] |
---|
3499 | add ebx, 8 |
---|
3500 | paddb mm0, mm1 |
---|
3501 | cmp ebx, MMXLength |
---|
3502 | movq [edi+ebx-8], mm0 // mov does not affect flags; -8 to offset |
---|
3503 | // add ebx |
---|
3504 | jb dsubAlp |
---|
3505 | } // end _asm block |
---|
3506 | } |
---|
3507 | break; |
---|
3508 | |
---|
3509 | } // end switch ( bpp ) |
---|
3510 | |
---|
3511 | _asm { |
---|
3512 | mov ebx, MMXLength |
---|
3513 | mov edi, row |
---|
3514 | cmp ebx, FullLength |
---|
3515 | jnb dsubend |
---|
3516 | mov esi, edi // lp = row |
---|
3517 | xor eax, eax |
---|
3518 | add edi, bpp // rp = row + bpp |
---|
3519 | dsublp2: |
---|
3520 | mov al, [esi+ebx] |
---|
3521 | add [edi+ebx], al |
---|
3522 | inc ebx |
---|
3523 | cmp ebx, FullLength |
---|
3524 | jb dsublp2 |
---|
3525 | dsubend: |
---|
3526 | emms // End MMX instructions; prep for possible FP instrs. |
---|
3527 | } // end _asm block |
---|
3528 | } |
---|
3529 | |
---|
3530 | // Optimized code for PNG Up filter decoder |
---|
3531 | void /* PRIVATE */ |
---|
3532 | png_read_filter_row_mmx_up(png_row_infop row_info, png_bytep row, |
---|
3533 | png_bytep prev_row) |
---|
3534 | { |
---|
3535 | png_uint_32 len; |
---|
3536 | len = row_info->rowbytes; // # of bytes to filter |
---|
3537 | _asm { |
---|
3538 | mov edi, row |
---|
3539 | // get # of bytes to alignment |
---|
3540 | mov ecx, edi |
---|
3541 | xor ebx, ebx |
---|
3542 | add ecx, 0x7 |
---|
3543 | xor eax, eax |
---|
3544 | and ecx, 0xfffffff8 |
---|
3545 | mov esi, prev_row |
---|
3546 | sub ecx, edi |
---|
3547 | jz dupgo |
---|
3548 | // fix alignment |
---|
3549 | duplp1: |
---|
3550 | mov al, [edi+ebx] |
---|
3551 | add al, [esi+ebx] |
---|
3552 | inc ebx |
---|
3553 | cmp ebx, ecx |
---|
3554 | mov [edi + ebx-1], al // mov does not affect flags; -1 to offset inc ebx |
---|
3555 | jb duplp1 |
---|
3556 | dupgo: |
---|
3557 | mov ecx, len |
---|
3558 | mov edx, ecx |
---|
3559 | sub edx, ebx // subtract alignment fix |
---|
3560 | and edx, 0x0000003f // calc bytes over mult of 64 |
---|
3561 | sub ecx, edx // drop over bytes from length |
---|
3562 | // Unrolled loop - use all MMX registers and interleave to reduce |
---|
3563 | // number of branch instructions (loops) and reduce partial stalls |
---|
3564 | duploop: |
---|
3565 | movq mm1, [esi+ebx] |
---|
3566 | movq mm0, [edi+ebx] |
---|
3567 | movq mm3, [esi+ebx+8] |
---|
3568 | paddb mm0, mm1 |
---|
3569 | movq mm2, [edi+ebx+8] |
---|
3570 | movq [edi+ebx], mm0 |
---|
3571 | paddb mm2, mm3 |
---|
3572 | movq mm5, [esi+ebx+16] |
---|
3573 | movq [edi+ebx+8], mm2 |
---|
3574 | movq mm4, [edi+ebx+16] |
---|
3575 | movq mm7, [esi+ebx+24] |
---|
3576 | paddb mm4, mm5 |
---|
3577 | movq mm6, [edi+ebx+24] |
---|
3578 | movq [edi+ebx+16], mm4 |
---|
3579 | paddb mm6, mm7 |
---|
3580 | movq mm1, [esi+ebx+32] |
---|
3581 | movq [edi+ebx+24], mm6 |
---|
3582 | movq mm0, [edi+ebx+32] |
---|
3583 | movq mm3, [esi+ebx+40] |
---|
3584 | paddb mm0, mm1 |
---|
3585 | movq mm2, [edi+ebx+40] |
---|
3586 | movq [edi+ebx+32], mm0 |
---|
3587 | paddb mm2, mm3 |
---|
3588 | movq mm5, [esi+ebx+48] |
---|
3589 | movq [edi+ebx+40], mm2 |
---|
3590 | movq mm4, [edi+ebx+48] |
---|
3591 | movq mm7, [esi+ebx+56] |
---|
3592 | paddb mm4, mm5 |
---|
3593 | movq mm6, [edi+ebx+56] |
---|
3594 | movq [edi+ebx+48], mm4 |
---|
3595 | add ebx, 64 |
---|
3596 | paddb mm6, mm7 |
---|
3597 | cmp ebx, ecx |
---|
3598 | movq [edi+ebx-8], mm6 // (+56)movq does not affect flags; |
---|
3599 | // -8 to offset add ebx |
---|
3600 | jb duploop |
---|
3601 | |
---|
3602 | cmp edx, 0 // Test for bytes over mult of 64 |
---|
3603 | jz dupend |
---|
3604 | |
---|
3605 | |
---|
3606 | // 2 lines added by lcreeve@netins.net |
---|
3607 | // (mail 11 Jul 98 in png-implement list) |
---|
3608 | cmp edx, 8 //test for less than 8 bytes |
---|
3609 | jb duplt8 |
---|
3610 | |
---|
3611 | |
---|
3612 | add ecx, edx |
---|
3613 | and edx, 0x00000007 // calc bytes over mult of 8 |
---|
3614 | sub ecx, edx // drop over bytes from length |
---|
3615 | jz duplt8 |
---|
3616 | // Loop using MMX registers mm0 & mm1 to update 8 bytes simultaneously |
---|
3617 | duplpA: |
---|
3618 | movq mm1, [esi+ebx] |
---|
3619 | movq mm0, [edi+ebx] |
---|
3620 | add ebx, 8 |
---|
3621 | paddb mm0, mm1 |
---|
3622 | cmp ebx, ecx |
---|
3623 | movq [edi+ebx-8], mm0 // movq does not affect flags; -8 to offset add ebx |
---|
3624 | jb duplpA |
---|
3625 | cmp edx, 0 // Test for bytes over mult of 8 |
---|
3626 | jz dupend |
---|
3627 | duplt8: |
---|
3628 | xor eax, eax |
---|
3629 | add ecx, edx // move over byte count into counter |
---|
3630 | // Loop using x86 registers to update remaining bytes |
---|
3631 | duplp2: |
---|
3632 | mov al, [edi + ebx] |
---|
3633 | add al, [esi + ebx] |
---|
3634 | inc ebx |
---|
3635 | cmp ebx, ecx |
---|
3636 | mov [edi + ebx-1], al // mov does not affect flags; -1 to offset inc ebx |
---|
3637 | jb duplp2 |
---|
3638 | dupend: |
---|
3639 | // Conversion of filtered row completed |
---|
3640 | emms // End MMX instructions; prep for possible FP instrs. |
---|
3641 | } // end _asm block |
---|
3642 | } |
---|
3643 | |
---|
3644 | |
---|
3645 | // Optimized png_read_filter_row routines |
---|
3646 | void /* PRIVATE */ |
---|
3647 | png_read_filter_row(png_structp png_ptr, png_row_infop row_info, png_bytep |
---|
3648 | row, png_bytep prev_row, int filter) |
---|
3649 | { |
---|
3650 | #ifdef PNG_DEBUG |
---|
3651 | char filnm[10]; |
---|
3652 | #endif |
---|
3653 | |
---|
3654 | if (mmx_supported == 2) { |
---|
3655 | /* this should have happened in png_init_mmx_flags() already */ |
---|
3656 | png_warning(png_ptr, "asm_flags may not have been initialized"); |
---|
3657 | png_mmx_support(); |
---|
3658 | } |
---|
3659 | |
---|
3660 | #ifdef PNG_DEBUG |
---|
3661 | png_debug(1, "in png_read_filter_row\n"); |
---|
3662 | switch (filter) |
---|
3663 | { |
---|
3664 | case 0: sprintf(filnm, "none"); |
---|
3665 | break; |
---|
3666 | case 1: sprintf(filnm, "sub-%s", |
---|
3667 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "MMX" : "x86"); |
---|
3668 | break; |
---|
3669 | case 2: sprintf(filnm, "up-%s", |
---|
3670 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "MMX" : "x86"); |
---|
3671 | break; |
---|
3672 | case 3: sprintf(filnm, "avg-%s", |
---|
3673 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "MMX" : "x86"); |
---|
3674 | break; |
---|
3675 | case 4: sprintf(filnm, "Paeth-%s", |
---|
3676 | (png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "MMX":"x86"); |
---|
3677 | break; |
---|
3678 | default: sprintf(filnm, "unknw"); |
---|
3679 | break; |
---|
3680 | } |
---|
3681 | png_debug2(0,"row=%5d, %s, ", png_ptr->row_number, filnm); |
---|
3682 | png_debug2(0, "pd=%2d, b=%d, ", (int)row_info->pixel_depth, |
---|
3683 | (int)((row_info->pixel_depth + 7) >> 3)); |
---|
3684 | png_debug1(0,"len=%8d, ", row_info->rowbytes); |
---|
3685 | #endif /* PNG_DEBUG */ |
---|
3686 | |
---|
3687 | switch (filter) |
---|
3688 | { |
---|
3689 | case PNG_FILTER_VALUE_NONE: |
---|
3690 | break; |
---|
3691 | |
---|
3692 | case PNG_FILTER_VALUE_SUB: |
---|
3693 | { |
---|
3694 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB) && |
---|
3695 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
---|
3696 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
---|
3697 | { |
---|
3698 | png_read_filter_row_mmx_sub(row_info, row); |
---|
3699 | } |
---|
3700 | else |
---|
3701 | { |
---|
3702 | png_uint_32 i; |
---|
3703 | png_uint_32 istop = row_info->rowbytes; |
---|
3704 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
---|
3705 | png_bytep rp = row + bpp; |
---|
3706 | png_bytep lp = row; |
---|
3707 | |
---|
3708 | for (i = bpp; i < istop; i++) |
---|
3709 | { |
---|
3710 | *rp = (png_byte)(((int)(*rp) + (int)(*lp++)) & 0xff); |
---|
3711 | rp++; |
---|
3712 | } |
---|
3713 | } |
---|
3714 | break; |
---|
3715 | } |
---|
3716 | |
---|
3717 | case PNG_FILTER_VALUE_UP: |
---|
3718 | { |
---|
3719 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP) && |
---|
3720 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
---|
3721 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
---|
3722 | { |
---|
3723 | png_read_filter_row_mmx_up(row_info, row, prev_row); |
---|
3724 | } |
---|
3725 | else |
---|
3726 | { |
---|
3727 | png_uint_32 i; |
---|
3728 | png_uint_32 istop = row_info->rowbytes; |
---|
3729 | png_bytep rp = row; |
---|
3730 | png_bytep pp = prev_row; |
---|
3731 | |
---|
3732 | for (i = 0; i < istop; ++i) |
---|
3733 | { |
---|
3734 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
---|
3735 | rp++; |
---|
3736 | } |
---|
3737 | } |
---|
3738 | break; |
---|
3739 | } |
---|
3740 | |
---|
3741 | case PNG_FILTER_VALUE_AVG: |
---|
3742 | { |
---|
3743 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG) && |
---|
3744 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
---|
3745 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
---|
3746 | { |
---|
3747 | png_read_filter_row_mmx_avg(row_info, row, prev_row); |
---|
3748 | } |
---|
3749 | else |
---|
3750 | { |
---|
3751 | png_uint_32 i; |
---|
3752 | png_bytep rp = row; |
---|
3753 | png_bytep pp = prev_row; |
---|
3754 | png_bytep lp = row; |
---|
3755 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
---|
3756 | png_uint_32 istop = row_info->rowbytes - bpp; |
---|
3757 | |
---|
3758 | for (i = 0; i < bpp; i++) |
---|
3759 | { |
---|
3760 | *rp = (png_byte)(((int)(*rp) + |
---|
3761 | ((int)(*pp++) >> 1)) & 0xff); |
---|
3762 | rp++; |
---|
3763 | } |
---|
3764 | |
---|
3765 | for (i = 0; i < istop; i++) |
---|
3766 | { |
---|
3767 | *rp = (png_byte)(((int)(*rp) + |
---|
3768 | ((int)(*pp++ + *lp++) >> 1)) & 0xff); |
---|
3769 | rp++; |
---|
3770 | } |
---|
3771 | } |
---|
3772 | break; |
---|
3773 | } |
---|
3774 | |
---|
3775 | case PNG_FILTER_VALUE_PAETH: |
---|
3776 | { |
---|
3777 | if ((png_ptr->asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH) && |
---|
3778 | (row_info->pixel_depth >= png_ptr->mmx_bitdepth_threshold) && |
---|
3779 | (row_info->rowbytes >= png_ptr->mmx_rowbytes_threshold)) |
---|
3780 | { |
---|
3781 | png_read_filter_row_mmx_paeth(row_info, row, prev_row); |
---|
3782 | } |
---|
3783 | else |
---|
3784 | { |
---|
3785 | png_uint_32 i; |
---|
3786 | png_bytep rp = row; |
---|
3787 | png_bytep pp = prev_row; |
---|
3788 | png_bytep lp = row; |
---|
3789 | png_bytep cp = prev_row; |
---|
3790 | png_uint_32 bpp = (row_info->pixel_depth + 7) >> 3; |
---|
3791 | png_uint_32 istop=row_info->rowbytes - bpp; |
---|
3792 | |
---|
3793 | for (i = 0; i < bpp; i++) |
---|
3794 | { |
---|
3795 | *rp = (png_byte)(((int)(*rp) + (int)(*pp++)) & 0xff); |
---|
3796 | rp++; |
---|
3797 | } |
---|
3798 | |
---|
3799 | for (i = 0; i < istop; i++) // use leftover rp,pp |
---|
3800 | { |
---|
3801 | int a, b, c, pa, pb, pc, p; |
---|
3802 | |
---|
3803 | a = *lp++; |
---|
3804 | b = *pp++; |
---|
3805 | c = *cp++; |
---|
3806 | |
---|
3807 | p = b - c; |
---|
3808 | pc = a - c; |
---|
3809 | |
---|
3810 | #ifdef PNG_USE_ABS |
---|
3811 | pa = abs(p); |
---|
3812 | pb = abs(pc); |
---|
3813 | pc = abs(p + pc); |
---|
3814 | #else |
---|
3815 | pa = p < 0 ? -p : p; |
---|
3816 | pb = pc < 0 ? -pc : pc; |
---|
3817 | pc = (p + pc) < 0 ? -(p + pc) : p + pc; |
---|
3818 | #endif |
---|
3819 | |
---|
3820 | /* |
---|
3821 | if (pa <= pb && pa <= pc) |
---|
3822 | p = a; |
---|
3823 | else if (pb <= pc) |
---|
3824 | p = b; |
---|
3825 | else |
---|
3826 | p = c; |
---|
3827 | */ |
---|
3828 | |
---|
3829 | p = (pa <= pb && pa <=pc) ? a : (pb <= pc) ? b : c; |
---|
3830 | |
---|
3831 | *rp = (png_byte)(((int)(*rp) + p) & 0xff); |
---|
3832 | rp++; |
---|
3833 | } |
---|
3834 | } |
---|
3835 | break; |
---|
3836 | } |
---|
3837 | |
---|
3838 | default: |
---|
3839 | png_warning(png_ptr, "Ignoring bad row filter type"); |
---|
3840 | *row=0; |
---|
3841 | break; |
---|
3842 | } |
---|
3843 | } |
---|
3844 | |
---|
3845 | #endif /* PNG_ASSEMBLER_CODE_SUPPORTED && PNG_USE_PNGVCRD */ |
---|