1 | /* Machine mode definitions for GNU C-Compiler; included by rtl.h and tree.h. |
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2 | Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc. |
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3 | |
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4 | This file is part of GNU CC. |
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5 | |
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6 | GNU CC is free software; you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation; either version 2, or (at your option) |
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9 | any later version. |
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10 | |
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11 | GNU CC is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with GNU CC; see the file COPYING. If not, write to |
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18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. */ |
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20 | |
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21 | |
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22 | /* Add prototype support. */ |
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23 | #ifndef PROTO |
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24 | #if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) |
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25 | #define PROTO(ARGS) ARGS |
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26 | #else |
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27 | #define PROTO(ARGS) () |
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28 | #endif |
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29 | #endif |
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30 | |
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31 | #ifndef HAVE_MACHINE_MODES |
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32 | |
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33 | /* Strictly speaking, this isn't the proper place to include these definitions, |
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34 | but this file is included by every GCC file. |
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35 | |
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36 | Some systems define these in, e.g., param.h. We undefine these names |
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37 | here to avoid the warnings. We prefer to use our definitions since we |
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38 | know they are correct. */ |
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39 | |
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40 | #undef MIN |
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41 | #undef MAX |
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42 | |
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43 | #define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) |
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44 | #define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) |
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45 | |
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46 | /* Find the largest host integer type and set its size and type. */ |
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47 | |
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48 | #ifndef HOST_BITS_PER_WIDE_INT |
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49 | |
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50 | #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT |
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51 | #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG |
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52 | #define HOST_WIDE_INT long |
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53 | #else |
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54 | #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT |
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55 | #define HOST_WIDE_INT int |
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56 | #endif |
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57 | |
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58 | #endif |
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59 | |
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60 | /* Provide a default way to print an address in hex via printf. */ |
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61 | |
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62 | #ifndef HOST_PTR_PRINTF |
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63 | #define HOST_PTR_PRINTF sizeof (int) == sizeof (char *) ? "%x" : "%lx" |
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64 | #endif |
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65 | |
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66 | /* Make an enum class that gives all the machine modes. */ |
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67 | |
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68 | #define DEF_MACHMODE(SYM, NAME, TYPE, SIZE, UNIT, WIDER) SYM, |
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69 | |
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70 | enum machine_mode { |
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71 | #include "machmode.def" |
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72 | |
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73 | #ifdef EXTRA_CC_MODES |
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74 | EXTRA_CC_MODES, |
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75 | #endif |
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76 | MAX_MACHINE_MODE }; |
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77 | |
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78 | #undef DEF_MACHMODE |
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79 | |
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80 | #define HAVE_MACHINE_MODES |
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81 | |
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82 | #ifndef NUM_MACHINE_MODES |
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83 | #define NUM_MACHINE_MODES (int) MAX_MACHINE_MODE |
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84 | #endif |
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85 | |
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86 | /* Get the name of mode MODE as a string. */ |
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87 | |
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88 | extern char *mode_name[]; |
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89 | #define GET_MODE_NAME(MODE) (mode_name[(int)(MODE)]) |
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90 | |
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91 | enum mode_class { MODE_RANDOM, MODE_INT, MODE_FLOAT, MODE_PARTIAL_INT, MODE_CC, |
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92 | MODE_COMPLEX_INT, MODE_COMPLEX_FLOAT, MAX_MODE_CLASS}; |
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93 | |
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94 | /* Get the general kind of object that mode MODE represents |
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95 | (integer, floating, complex, etc.) */ |
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96 | |
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97 | extern enum mode_class mode_class[]; |
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98 | #define GET_MODE_CLASS(MODE) (mode_class[(int)(MODE)]) |
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99 | |
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100 | /* Nonzero if MODE is an integral mode. */ |
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101 | #define INTEGRAL_MODE_P(MODE) \ |
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102 | (GET_MODE_CLASS (MODE) == MODE_INT \ |
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103 | || GET_MODE_CLASS (MODE) == MODE_PARTIAL_INT \ |
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104 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_INT) |
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105 | |
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106 | /* Nonzero if MODE is a floating-point mode. */ |
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107 | #define FLOAT_MODE_P(MODE) \ |
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108 | (GET_MODE_CLASS (MODE) == MODE_FLOAT \ |
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109 | || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) |
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110 | |
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111 | /* Get the size in bytes of an object of mode MODE. */ |
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112 | |
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113 | extern int mode_size[]; |
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114 | #define GET_MODE_SIZE(MODE) (mode_size[(int)(MODE)]) |
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115 | |
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116 | /* Get the size in bytes of the basic parts of an object of mode MODE. */ |
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117 | |
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118 | extern int mode_unit_size[]; |
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119 | #define GET_MODE_UNIT_SIZE(MODE) (mode_unit_size[(int)(MODE)]) |
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120 | |
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121 | /* Get the number of units in the object. */ |
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122 | |
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123 | #define GET_MODE_NUNITS(MODE) \ |
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124 | ((GET_MODE_UNIT_SIZE ((MODE)) == 0) ? 0 \ |
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125 | : (GET_MODE_SIZE ((MODE)) / GET_MODE_UNIT_SIZE ((MODE)))) |
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126 | |
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127 | /* Get the size in bits of an object of mode MODE. */ |
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128 | |
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129 | #define GET_MODE_BITSIZE(MODE) (BITS_PER_UNIT * mode_size[(int)(MODE)]) |
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130 | |
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131 | /* Get a bitmask containing 1 for all bits in a word |
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132 | that fit within mode MODE. */ |
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133 | |
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134 | #define GET_MODE_MASK(MODE) \ |
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135 | ((GET_MODE_BITSIZE (MODE) >= HOST_BITS_PER_WIDE_INT) \ |
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136 | ?(HOST_WIDE_INT) ~0 : (((HOST_WIDE_INT) 1 << GET_MODE_BITSIZE (MODE)) - 1)) |
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137 | |
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138 | /* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */ |
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139 | |
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140 | extern enum machine_mode mode_wider_mode[]; |
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141 | #define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)]) |
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142 | |
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143 | /* Return the mode for data of a given size SIZE and mode class CLASS. |
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144 | If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE. |
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145 | The value is BLKmode if no other mode is found. */ |
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146 | |
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147 | extern enum machine_mode mode_for_size PROTO((unsigned int, enum mode_class, int)); |
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148 | |
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149 | /* Find the best mode to use to access a bit field. */ |
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150 | |
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151 | extern enum machine_mode get_best_mode PROTO((int, int, int, enum machine_mode, int)); |
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152 | |
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153 | /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ |
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154 | |
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155 | #define GET_MODE_ALIGNMENT(MODE) \ |
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156 | MIN (BIGGEST_ALIGNMENT, \ |
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157 | MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))) |
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158 | |
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159 | /* For each class, get the narrowest mode in that class. */ |
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160 | |
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161 | extern enum machine_mode class_narrowest_mode[]; |
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162 | #define GET_CLASS_NARROWEST_MODE(CLASS) class_narrowest_mode[(int)(CLASS)] |
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163 | |
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164 | /* Define the integer modes whose sizes are BITS_PER_UNIT and BITS_PER_WORD |
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165 | and the mode whose class is Pmode and whose size is POINTER_SIZE. */ |
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166 | |
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167 | extern enum machine_mode byte_mode; |
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168 | extern enum machine_mode word_mode; |
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169 | extern enum machine_mode ptr_mode; |
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170 | |
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171 | #endif /* not HAVE_MACHINE_MODES */ |
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