1 | /* Generate code from machine description to emit insns as rtl. |
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2 | Copyright (C) 1987, 88, 91, 94, 95, 1997 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 | #include <stdio.h> |
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23 | #include "hconfig.h" |
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24 | #include "rtl.h" |
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25 | #include "obstack.h" |
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26 | |
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27 | static struct obstack obstack; |
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28 | struct obstack *rtl_obstack = &obstack; |
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29 | |
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30 | #define obstack_chunk_alloc xmalloc |
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31 | #define obstack_chunk_free free |
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32 | |
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33 | extern void free (); |
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34 | extern rtx read_rtx (); |
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35 | |
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36 | char *xmalloc (); |
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37 | static void fatal (); |
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38 | void fancy_abort (); |
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39 | |
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40 | static int max_opno; |
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41 | static int max_dup_opno; |
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42 | static int register_constraints; |
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43 | static int insn_code_number; |
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44 | static int insn_index_number; |
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45 | |
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46 | /* Data structure for recording the patterns of insns that have CLOBBERs. |
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47 | We use this to output a function that adds these CLOBBERs to a |
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48 | previously-allocated PARALLEL expression. */ |
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49 | |
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50 | struct clobber_pat |
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51 | { |
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52 | struct clobber_ent *insns; |
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53 | rtx pattern; |
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54 | int first_clobber; |
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55 | struct clobber_pat *next; |
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56 | } *clobber_list; |
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57 | |
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58 | /* Records one insn that uses the clobber list. */ |
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59 | |
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60 | struct clobber_ent |
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61 | { |
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62 | int code_number; /* Counts only insns. */ |
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63 | struct clobber_ent *next; |
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64 | }; |
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65 | |
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66 | static void |
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67 | max_operand_1 (x) |
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68 | rtx x; |
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69 | { |
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70 | register RTX_CODE code; |
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71 | register int i; |
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72 | register int len; |
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73 | register char *fmt; |
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74 | |
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75 | if (x == 0) |
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76 | return; |
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77 | |
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78 | code = GET_CODE (x); |
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79 | |
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80 | if (code == MATCH_OPERAND && XSTR (x, 2) != 0 && *XSTR (x, 2) != '\0') |
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81 | register_constraints = 1; |
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82 | if (code == MATCH_SCRATCH && XSTR (x, 1) != 0 && *XSTR (x, 1) != '\0') |
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83 | register_constraints = 1; |
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84 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR |
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85 | || code == MATCH_PARALLEL) |
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86 | max_opno = MAX (max_opno, XINT (x, 0)); |
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87 | if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) |
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88 | max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); |
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89 | |
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90 | fmt = GET_RTX_FORMAT (code); |
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91 | len = GET_RTX_LENGTH (code); |
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92 | for (i = 0; i < len; i++) |
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93 | { |
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94 | if (fmt[i] == 'e' || fmt[i] == 'u') |
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95 | max_operand_1 (XEXP (x, i)); |
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96 | else if (fmt[i] == 'E') |
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97 | { |
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98 | int j; |
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99 | for (j = 0; j < XVECLEN (x, i); j++) |
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100 | max_operand_1 (XVECEXP (x, i, j)); |
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101 | } |
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102 | } |
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103 | } |
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104 | |
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105 | static int |
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106 | max_operand_vec (insn, arg) |
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107 | rtx insn; |
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108 | int arg; |
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109 | { |
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110 | register int len = XVECLEN (insn, arg); |
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111 | register int i; |
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112 | |
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113 | max_opno = -1; |
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114 | max_dup_opno = -1; |
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115 | |
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116 | for (i = 0; i < len; i++) |
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117 | max_operand_1 (XVECEXP (insn, arg, i)); |
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118 | |
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119 | return max_opno + 1; |
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120 | } |
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121 | |
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122 | static void |
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123 | print_code (code) |
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124 | RTX_CODE code; |
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125 | { |
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126 | register char *p1; |
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127 | for (p1 = GET_RTX_NAME (code); *p1; p1++) |
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128 | { |
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129 | if (*p1 >= 'a' && *p1 <= 'z') |
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130 | putchar (*p1 + 'A' - 'a'); |
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131 | else |
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132 | putchar (*p1); |
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133 | } |
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134 | } |
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135 | |
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136 | /* Print a C expression to construct an RTX just like X, |
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137 | substituting any operand references appearing within. */ |
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138 | |
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139 | static void |
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140 | gen_exp (x) |
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141 | rtx x; |
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142 | { |
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143 | register RTX_CODE code; |
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144 | register int i; |
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145 | register int len; |
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146 | register char *fmt; |
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147 | |
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148 | if (x == 0) |
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149 | { |
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150 | printf ("NULL_RTX"); |
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151 | return; |
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152 | } |
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153 | |
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154 | code = GET_CODE (x); |
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155 | |
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156 | switch (code) |
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157 | { |
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158 | case MATCH_OPERAND: |
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159 | case MATCH_DUP: |
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160 | printf ("operand%d", XINT (x, 0)); |
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161 | return; |
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162 | |
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163 | case MATCH_OP_DUP: |
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164 | printf ("gen_rtx (GET_CODE (operand%d), GET_MODE (operand%d)", |
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165 | XINT (x, 0), XINT (x, 0)); |
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166 | for (i = 0; i < XVECLEN (x, 1); i++) |
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167 | { |
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168 | printf (",\n\t\t"); |
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169 | gen_exp (XVECEXP (x, 1, i)); |
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170 | } |
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171 | printf (")"); |
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172 | return; |
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173 | |
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174 | case MATCH_OPERATOR: |
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175 | printf ("gen_rtx (GET_CODE (operand%d)", XINT (x, 0)); |
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176 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); |
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177 | for (i = 0; i < XVECLEN (x, 2); i++) |
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178 | { |
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179 | printf (",\n\t\t"); |
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180 | gen_exp (XVECEXP (x, 2, i)); |
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181 | } |
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182 | printf (")"); |
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183 | return; |
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184 | |
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185 | case MATCH_PARALLEL: |
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186 | case MATCH_PAR_DUP: |
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187 | printf ("operand%d", XINT (x, 0)); |
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188 | return; |
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189 | |
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190 | case MATCH_SCRATCH: |
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191 | printf ("gen_rtx (SCRATCH, %smode, 0)", GET_MODE_NAME (GET_MODE (x))); |
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192 | return; |
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193 | |
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194 | case ADDRESS: |
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195 | fatal ("ADDRESS expression code used in named instruction pattern"); |
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196 | |
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197 | case PC: |
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198 | printf ("pc_rtx"); |
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199 | return; |
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200 | |
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201 | case CC0: |
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202 | printf ("cc0_rtx"); |
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203 | return; |
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204 | |
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205 | case CONST_INT: |
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206 | if (INTVAL (x) == 0) |
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207 | printf ("const0_rtx"); |
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208 | else if (INTVAL (x) == 1) |
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209 | printf ("const1_rtx"); |
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210 | else if (INTVAL (x) == -1) |
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211 | printf ("constm1_rtx"); |
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212 | else if (INTVAL (x) == STORE_FLAG_VALUE) |
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213 | printf ("const_true_rtx"); |
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214 | else |
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215 | printf ( |
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216 | #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT |
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217 | "GEN_INT (%d)", |
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218 | #else |
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219 | "GEN_INT (%ld)", |
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220 | #endif |
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221 | INTVAL (x)); |
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222 | return; |
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223 | |
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224 | case CONST_DOUBLE: |
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225 | /* These shouldn't be written in MD files. Instead, the appropriate |
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226 | routines in varasm.c should be called. */ |
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227 | abort (); |
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228 | } |
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229 | |
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230 | printf ("gen_rtx ("); |
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231 | print_code (code); |
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232 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); |
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233 | |
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234 | fmt = GET_RTX_FORMAT (code); |
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235 | len = GET_RTX_LENGTH (code); |
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236 | for (i = 0; i < len; i++) |
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237 | { |
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238 | if (fmt[i] == '0') |
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239 | break; |
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240 | printf (",\n\t"); |
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241 | if (fmt[i] == 'e' || fmt[i] == 'u') |
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242 | gen_exp (XEXP (x, i)); |
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243 | else if (fmt[i] == 'i') |
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244 | printf ("%u", XINT (x, i)); |
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245 | else if (fmt[i] == 's') |
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246 | printf ("\"%s\"", XSTR (x, i)); |
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247 | else if (fmt[i] == 'E') |
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248 | { |
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249 | int j; |
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250 | printf ("gen_rtvec (%d", XVECLEN (x, i)); |
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251 | for (j = 0; j < XVECLEN (x, i); j++) |
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252 | { |
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253 | printf (",\n\t\t"); |
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254 | gen_exp (XVECEXP (x, i, j)); |
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255 | } |
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256 | printf (")"); |
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257 | } |
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258 | else |
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259 | abort (); |
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260 | } |
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261 | printf (")"); |
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262 | } |
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263 | |
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264 | /* Generate the `gen_...' function for a DEFINE_INSN. */ |
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265 | |
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266 | static void |
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267 | gen_insn (insn) |
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268 | rtx insn; |
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269 | { |
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270 | int operands; |
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271 | register int i; |
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272 | |
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273 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) |
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274 | registers or MATCH_SCRATCHes. If so, store away the information for |
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275 | later. */ |
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276 | |
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277 | if (XVEC (insn, 1)) |
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278 | { |
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279 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) |
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280 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER |
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281 | || (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != REG |
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282 | && GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH)) |
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283 | break; |
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284 | |
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285 | if (i != XVECLEN (insn, 1) - 1) |
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286 | { |
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287 | register struct clobber_pat *p; |
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288 | register struct clobber_ent *link |
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289 | = (struct clobber_ent *) xmalloc (sizeof (struct clobber_ent)); |
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290 | register int j; |
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291 | |
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292 | link->code_number = insn_code_number; |
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293 | |
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294 | /* See if any previous CLOBBER_LIST entry is the same as this |
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295 | one. */ |
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296 | |
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297 | for (p = clobber_list; p; p = p->next) |
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298 | { |
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299 | if (p->first_clobber != i + 1 |
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300 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) |
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301 | continue; |
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302 | |
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303 | for (j = i + 1; j < XVECLEN (insn, 1); j++) |
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304 | { |
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305 | rtx old = XEXP (XVECEXP (p->pattern, 1, j), 0); |
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306 | rtx new = XEXP (XVECEXP (insn, 1, j), 0); |
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307 | |
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308 | /* OLD and NEW are the same if both are to be a SCRATCH |
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309 | of the same mode, |
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310 | or if both are registers of the same mode and number. */ |
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311 | if (! (GET_MODE (old) == GET_MODE (new) |
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312 | && ((GET_CODE (old) == MATCH_SCRATCH |
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313 | && GET_CODE (new) == MATCH_SCRATCH) |
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314 | || (GET_CODE (old) == REG && GET_CODE (new) == REG |
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315 | && REGNO (old) == REGNO (new))))) |
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316 | break; |
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317 | } |
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318 | |
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319 | if (j == XVECLEN (insn, 1)) |
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320 | break; |
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321 | } |
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322 | |
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323 | if (p == 0) |
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324 | { |
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325 | p = (struct clobber_pat *) xmalloc (sizeof (struct clobber_pat)); |
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326 | |
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327 | p->insns = 0; |
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328 | p->pattern = insn; |
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329 | p->first_clobber = i + 1; |
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330 | p->next = clobber_list; |
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331 | clobber_list = p; |
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332 | } |
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333 | |
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334 | link->next = p->insns; |
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335 | p->insns = link; |
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336 | } |
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337 | } |
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338 | |
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339 | /* Don't mention instructions whose names are the null string |
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340 | or begin with '*'. They are in the machine description just |
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341 | to be recognized. */ |
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342 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') |
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343 | return; |
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344 | |
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345 | /* Find out how many operands this function has, |
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346 | and also whether any of them have register constraints. */ |
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347 | register_constraints = 0; |
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348 | operands = max_operand_vec (insn, 1); |
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349 | if (max_dup_opno >= operands) |
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350 | fatal ("match_dup operand number has no match_operand"); |
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351 | |
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352 | /* Output the function name and argument declarations. */ |
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353 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); |
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354 | for (i = 0; i < operands; i++) |
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355 | printf (i ? ", operand%d" : "operand%d", i); |
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356 | printf (")\n"); |
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357 | for (i = 0; i < operands; i++) |
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358 | printf (" rtx operand%d;\n", i); |
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359 | printf ("{\n"); |
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360 | |
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361 | /* Output code to construct and return the rtl for the instruction body */ |
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362 | |
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363 | if (XVECLEN (insn, 1) == 1) |
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364 | { |
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365 | printf (" return "); |
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366 | gen_exp (XVECEXP (insn, 1, 0)); |
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367 | printf (";\n}\n\n"); |
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368 | } |
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369 | else |
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370 | { |
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371 | printf (" return gen_rtx (PARALLEL, VOIDmode, gen_rtvec (%d", XVECLEN (insn, 1)); |
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372 | for (i = 0; i < XVECLEN (insn, 1); i++) |
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373 | { |
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374 | printf (",\n\t\t"); |
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375 | gen_exp (XVECEXP (insn, 1, i)); |
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376 | } |
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377 | printf ("));\n}\n\n"); |
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378 | } |
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379 | } |
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380 | |
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381 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ |
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382 | |
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383 | static void |
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384 | gen_expand (expand) |
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385 | rtx expand; |
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386 | { |
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387 | int operands; |
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388 | register int i; |
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389 | |
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390 | if (strlen (XSTR (expand, 0)) == 0) |
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391 | fatal ("define_expand lacks a name"); |
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392 | if (XVEC (expand, 1) == 0) |
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393 | fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); |
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394 | |
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395 | /* Find out how many operands this function has, |
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396 | and also whether any of them have register constraints. */ |
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397 | register_constraints = 0; |
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398 | |
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399 | operands = max_operand_vec (expand, 1); |
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400 | |
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401 | /* Output the function name and argument declarations. */ |
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402 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); |
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403 | for (i = 0; i < operands; i++) |
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404 | printf (i ? ", operand%d" : "operand%d", i); |
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405 | printf (")\n"); |
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406 | for (i = 0; i < operands; i++) |
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407 | printf (" rtx operand%d;\n", i); |
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408 | printf ("{\n"); |
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409 | |
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410 | /* If we don't have any C code to write, only one insn is being written, |
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411 | and no MATCH_DUPs are present, we can just return the desired insn |
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412 | like we do for a DEFINE_INSN. This saves memory. */ |
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413 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') |
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414 | && operands > max_dup_opno |
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415 | && XVECLEN (expand, 1) == 1) |
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416 | { |
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417 | printf (" return "); |
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418 | gen_exp (XVECEXP (expand, 1, 0)); |
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419 | printf (";\n}\n\n"); |
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420 | return; |
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421 | } |
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422 | |
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423 | /* For each operand referred to only with MATCH_DUPs, |
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424 | make a local variable. */ |
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425 | for (i = operands; i <= max_dup_opno; i++) |
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426 | printf (" rtx operand%d;\n", i); |
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427 | if (operands > 0 || max_dup_opno >= 0) |
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428 | printf (" rtx operands[%d];\n", MAX (operands, max_dup_opno + 1)); |
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429 | printf (" rtx _val = 0;\n"); |
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430 | printf (" start_sequence ();\n"); |
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431 | |
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432 | /* The fourth operand of DEFINE_EXPAND is some code to be executed |
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433 | before the actual construction. |
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434 | This code expects to refer to `operands' |
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435 | just as the output-code in a DEFINE_INSN does, |
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436 | but here `operands' is an automatic array. |
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437 | So copy the operand values there before executing it. */ |
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438 | if (XSTR (expand, 3) && *XSTR (expand, 3)) |
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439 | { |
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440 | /* Output code to copy the arguments into `operands'. */ |
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441 | for (i = 0; i < operands; i++) |
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442 | printf (" operands[%d] = operand%d;\n", i, i); |
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443 | |
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444 | /* Output the special code to be executed before the sequence |
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445 | is generated. */ |
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446 | printf ("%s\n", XSTR (expand, 3)); |
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447 | |
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448 | /* Output code to copy the arguments back out of `operands' |
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449 | (unless we aren't going to use them at all). */ |
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450 | if (XVEC (expand, 1) != 0) |
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451 | { |
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452 | for (i = 0; i < operands; i++) |
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453 | printf (" operand%d = operands[%d];\n", i, i); |
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454 | for (; i <= max_dup_opno; i++) |
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455 | printf (" operand%d = operands[%d];\n", i, i); |
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456 | } |
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457 | } |
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458 | |
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459 | /* Output code to construct the rtl for the instruction bodies. |
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460 | Use emit_insn to add them to the sequence being accumulated. |
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461 | But don't do this if the user's code has set `no_more' nonzero. */ |
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462 | |
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463 | for (i = 0; i < XVECLEN (expand, 1); i++) |
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464 | { |
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465 | rtx next = XVECEXP (expand, 1, i); |
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466 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) |
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467 | || (GET_CODE (next) == PARALLEL |
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468 | && GET_CODE (XVECEXP (next, 0, 0)) == SET |
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469 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) |
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470 | || GET_CODE (next) == RETURN) |
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471 | printf (" emit_jump_insn ("); |
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472 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) |
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473 | || GET_CODE (next) == CALL |
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474 | || (GET_CODE (next) == PARALLEL |
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475 | && GET_CODE (XVECEXP (next, 0, 0)) == SET |
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476 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) |
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477 | || (GET_CODE (next) == PARALLEL |
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478 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) |
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479 | printf (" emit_call_insn ("); |
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480 | else if (GET_CODE (next) == CODE_LABEL) |
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481 | printf (" emit_label ("); |
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482 | else if (GET_CODE (next) == MATCH_OPERAND |
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483 | || GET_CODE (next) == MATCH_OPERATOR |
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484 | || GET_CODE (next) == MATCH_PARALLEL |
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485 | || GET_CODE (next) == MATCH_OP_DUP |
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486 | || GET_CODE (next) == MATCH_DUP |
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487 | || GET_CODE (next) == PARALLEL) |
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488 | printf (" emit ("); |
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489 | else |
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490 | printf (" emit_insn ("); |
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491 | gen_exp (next); |
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492 | printf (");\n"); |
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493 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC |
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494 | && GET_CODE (SET_SRC (next)) == LABEL_REF) |
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495 | printf (" emit_barrier ();"); |
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496 | } |
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497 | |
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498 | /* Call `gen_sequence' to make a SEQUENCE out of all the |
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499 | insns emitted within this gen_... function. */ |
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500 | |
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501 | printf (" _done:\n"); |
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502 | printf (" _val = gen_sequence ();\n"); |
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503 | printf (" _fail:\n"); |
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504 | printf (" end_sequence ();\n"); |
---|
505 | printf (" return _val;\n}\n\n"); |
---|
506 | } |
---|
507 | |
---|
508 | /* Like gen_expand, but generates a SEQUENCE. */ |
---|
509 | |
---|
510 | static void |
---|
511 | gen_split (split) |
---|
512 | rtx split; |
---|
513 | { |
---|
514 | register int i; |
---|
515 | int operands; |
---|
516 | |
---|
517 | if (XVEC (split, 0) == 0) |
---|
518 | fatal ("define_split (definition %d) lacks a pattern", insn_index_number); |
---|
519 | else if (XVEC (split, 2) == 0) |
---|
520 | fatal ("define_split (definition %d) lacks a replacement pattern", |
---|
521 | insn_index_number); |
---|
522 | |
---|
523 | /* Find out how many operands this function has. */ |
---|
524 | |
---|
525 | max_operand_vec (split, 2); |
---|
526 | operands = MAX (max_opno, max_dup_opno) + 1; |
---|
527 | |
---|
528 | /* Output the function name and argument declarations. */ |
---|
529 | printf ("rtx\ngen_split_%d (operands)\n rtx *operands;\n", |
---|
530 | insn_code_number); |
---|
531 | printf ("{\n"); |
---|
532 | |
---|
533 | /* Declare all local variables. */ |
---|
534 | for (i = 0; i < operands; i++) |
---|
535 | printf (" rtx operand%d;\n", i); |
---|
536 | printf (" rtx _val = 0;\n"); |
---|
537 | printf (" start_sequence ();\n"); |
---|
538 | |
---|
539 | /* The fourth operand of DEFINE_SPLIT is some code to be executed |
---|
540 | before the actual construction. */ |
---|
541 | |
---|
542 | if (XSTR (split, 3)) |
---|
543 | printf ("%s\n", XSTR (split, 3)); |
---|
544 | |
---|
545 | /* Output code to copy the arguments back out of `operands' */ |
---|
546 | for (i = 0; i < operands; i++) |
---|
547 | printf (" operand%d = operands[%d];\n", i, i); |
---|
548 | |
---|
549 | /* Output code to construct the rtl for the instruction bodies. |
---|
550 | Use emit_insn to add them to the sequence being accumulated. |
---|
551 | But don't do this if the user's code has set `no_more' nonzero. */ |
---|
552 | |
---|
553 | for (i = 0; i < XVECLEN (split, 2); i++) |
---|
554 | { |
---|
555 | rtx next = XVECEXP (split, 2, i); |
---|
556 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) |
---|
557 | || (GET_CODE (next) == PARALLEL |
---|
558 | && GET_CODE (XVECEXP (next, 0, 0)) == SET |
---|
559 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) |
---|
560 | || GET_CODE (next) == RETURN) |
---|
561 | printf (" emit_jump_insn ("); |
---|
562 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) |
---|
563 | || GET_CODE (next) == CALL |
---|
564 | || (GET_CODE (next) == PARALLEL |
---|
565 | && GET_CODE (XVECEXP (next, 0, 0)) == SET |
---|
566 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) |
---|
567 | || (GET_CODE (next) == PARALLEL |
---|
568 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) |
---|
569 | printf (" emit_call_insn ("); |
---|
570 | else if (GET_CODE (next) == CODE_LABEL) |
---|
571 | printf (" emit_label ("); |
---|
572 | else if (GET_CODE (next) == MATCH_OPERAND |
---|
573 | || GET_CODE (next) == MATCH_OPERATOR |
---|
574 | || GET_CODE (next) == MATCH_PARALLEL |
---|
575 | || GET_CODE (next) == MATCH_OP_DUP |
---|
576 | || GET_CODE (next) == MATCH_DUP |
---|
577 | || GET_CODE (next) == PARALLEL) |
---|
578 | printf (" emit ("); |
---|
579 | else |
---|
580 | printf (" emit_insn ("); |
---|
581 | gen_exp (next); |
---|
582 | printf (");\n"); |
---|
583 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC |
---|
584 | && GET_CODE (SET_SRC (next)) == LABEL_REF) |
---|
585 | printf (" emit_barrier ();"); |
---|
586 | } |
---|
587 | |
---|
588 | /* Call `gen_sequence' to make a SEQUENCE out of all the |
---|
589 | insns emitted within this gen_... function. */ |
---|
590 | |
---|
591 | printf (" _done:\n"); |
---|
592 | printf (" _val = gen_sequence ();\n"); |
---|
593 | printf (" _fail:\n"); |
---|
594 | printf (" end_sequence ();\n"); |
---|
595 | printf (" return _val;\n}\n\n"); |
---|
596 | } |
---|
597 | |
---|
598 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient |
---|
599 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at |
---|
600 | the end of the vector. */ |
---|
601 | |
---|
602 | static void |
---|
603 | output_add_clobbers () |
---|
604 | { |
---|
605 | struct clobber_pat *clobber; |
---|
606 | struct clobber_ent *ent; |
---|
607 | int i; |
---|
608 | |
---|
609 | printf ("\n\nvoid\nadd_clobbers (pattern, insn_code_number)\n"); |
---|
610 | printf (" rtx pattern;\n int insn_code_number;\n"); |
---|
611 | printf ("{\n"); |
---|
612 | printf (" int i;\n\n"); |
---|
613 | printf (" switch (insn_code_number)\n"); |
---|
614 | printf (" {\n"); |
---|
615 | |
---|
616 | for (clobber = clobber_list; clobber; clobber = clobber->next) |
---|
617 | { |
---|
618 | for (ent = clobber->insns; ent; ent = ent->next) |
---|
619 | printf (" case %d:\n", ent->code_number); |
---|
620 | |
---|
621 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) |
---|
622 | { |
---|
623 | printf (" XVECEXP (pattern, 0, %d) = ", i); |
---|
624 | gen_exp (XVECEXP (clobber->pattern, 1, i)); |
---|
625 | printf (";\n"); |
---|
626 | } |
---|
627 | |
---|
628 | printf (" break;\n\n"); |
---|
629 | } |
---|
630 | |
---|
631 | printf (" default:\n"); |
---|
632 | printf (" abort ();\n"); |
---|
633 | printf (" }\n"); |
---|
634 | printf ("}\n"); |
---|
635 | } |
---|
636 | |
---|
637 | /* Write a function, init_mov_optab, that is called to set up entries |
---|
638 | in mov_optab for EXTRA_CC_MODES. */ |
---|
639 | |
---|
640 | static void |
---|
641 | output_init_mov_optab () |
---|
642 | { |
---|
643 | #ifdef EXTRA_CC_NAMES |
---|
644 | static char *cc_names[] = { EXTRA_CC_NAMES }; |
---|
645 | char *p; |
---|
646 | int i; |
---|
647 | |
---|
648 | printf ("\nvoid\ninit_mov_optab ()\n{\n"); |
---|
649 | |
---|
650 | for (i = 0; i < sizeof cc_names / sizeof cc_names[0]; i++) |
---|
651 | { |
---|
652 | printf ("#ifdef HAVE_mov"); |
---|
653 | for (p = cc_names[i]; *p; p++) |
---|
654 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); |
---|
655 | printf ("\n"); |
---|
656 | printf (" if (HAVE_mov"); |
---|
657 | for (p = cc_names[i]; *p; p++) |
---|
658 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); |
---|
659 | printf (")\n"); |
---|
660 | printf (" mov_optab->handlers[(int) %smode].insn_code = CODE_FOR_mov", |
---|
661 | cc_names[i]); |
---|
662 | for (p = cc_names[i]; *p; p++) |
---|
663 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); |
---|
664 | printf (";\n#endif\n"); |
---|
665 | } |
---|
666 | |
---|
667 | printf ("}\n"); |
---|
668 | #endif |
---|
669 | } |
---|
670 | |
---|
671 | char * |
---|
672 | xmalloc (size) |
---|
673 | unsigned size; |
---|
674 | { |
---|
675 | register char *val = (char *) malloc (size); |
---|
676 | |
---|
677 | if (val == 0) |
---|
678 | fatal ("virtual memory exhausted"); |
---|
679 | |
---|
680 | return val; |
---|
681 | } |
---|
682 | |
---|
683 | char * |
---|
684 | xrealloc (ptr, size) |
---|
685 | char *ptr; |
---|
686 | unsigned size; |
---|
687 | { |
---|
688 | char *result = (char *) realloc (ptr, size); |
---|
689 | if (!result) |
---|
690 | fatal ("virtual memory exhausted"); |
---|
691 | return result; |
---|
692 | } |
---|
693 | |
---|
694 | static void |
---|
695 | fatal (s, a1, a2) |
---|
696 | char *s; |
---|
697 | { |
---|
698 | fprintf (stderr, "genemit: "); |
---|
699 | fprintf (stderr, s, a1, a2); |
---|
700 | fprintf (stderr, "\n"); |
---|
701 | exit (FATAL_EXIT_CODE); |
---|
702 | } |
---|
703 | |
---|
704 | /* More 'friendly' abort that prints the line and file. |
---|
705 | config.h can #define abort fancy_abort if you like that sort of thing. */ |
---|
706 | |
---|
707 | void |
---|
708 | fancy_abort () |
---|
709 | { |
---|
710 | fatal ("Internal gcc abort."); |
---|
711 | } |
---|
712 | |
---|
713 | int |
---|
714 | main (argc, argv) |
---|
715 | int argc; |
---|
716 | char **argv; |
---|
717 | { |
---|
718 | rtx desc; |
---|
719 | FILE *infile; |
---|
720 | register int c; |
---|
721 | |
---|
722 | obstack_init (rtl_obstack); |
---|
723 | |
---|
724 | if (argc <= 1) |
---|
725 | fatal ("No input file name."); |
---|
726 | |
---|
727 | infile = fopen (argv[1], "r"); |
---|
728 | if (infile == 0) |
---|
729 | { |
---|
730 | perror (argv[1]); |
---|
731 | exit (FATAL_EXIT_CODE); |
---|
732 | } |
---|
733 | |
---|
734 | init_rtl (); |
---|
735 | |
---|
736 | /* Assign sequential codes to all entries in the machine description |
---|
737 | in parallel with the tables in insn-output.c. */ |
---|
738 | |
---|
739 | insn_code_number = 0; |
---|
740 | insn_index_number = 0; |
---|
741 | |
---|
742 | printf ("/* Generated automatically by the program `genemit'\n\ |
---|
743 | from the machine description file `md'. */\n\n"); |
---|
744 | |
---|
745 | printf ("#include \"config.h\"\n"); |
---|
746 | printf ("#include <stdio.h>\n"); |
---|
747 | printf ("#include \"rtl.h\"\n"); |
---|
748 | printf ("#include \"expr.h\"\n"); |
---|
749 | printf ("#include \"real.h\"\n"); |
---|
750 | printf ("#include \"flags.h\"\n"); |
---|
751 | printf ("#include \"output.h\"\n"); |
---|
752 | printf ("#include \"insn-config.h\"\n\n"); |
---|
753 | printf ("#include \"insn-flags.h\"\n\n"); |
---|
754 | printf ("#include \"insn-codes.h\"\n\n"); |
---|
755 | printf ("extern char *insn_operand_constraint[][MAX_RECOG_OPERANDS];\n\n"); |
---|
756 | printf ("extern rtx recog_operand[];\n"); |
---|
757 | printf ("#define operands emit_operand\n\n"); |
---|
758 | printf ("#define FAIL goto _fail\n\n"); |
---|
759 | printf ("#define DONE goto _done\n\n"); |
---|
760 | |
---|
761 | /* Read the machine description. */ |
---|
762 | |
---|
763 | while (1) |
---|
764 | { |
---|
765 | c = read_skip_spaces (infile); |
---|
766 | if (c == EOF) |
---|
767 | break; |
---|
768 | ungetc (c, infile); |
---|
769 | |
---|
770 | desc = read_rtx (infile); |
---|
771 | if (GET_CODE (desc) == DEFINE_INSN) |
---|
772 | { |
---|
773 | gen_insn (desc); |
---|
774 | ++insn_code_number; |
---|
775 | } |
---|
776 | if (GET_CODE (desc) == DEFINE_EXPAND) |
---|
777 | { |
---|
778 | gen_expand (desc); |
---|
779 | ++insn_code_number; |
---|
780 | } |
---|
781 | if (GET_CODE (desc) == DEFINE_SPLIT) |
---|
782 | { |
---|
783 | gen_split (desc); |
---|
784 | ++insn_code_number; |
---|
785 | } |
---|
786 | if (GET_CODE (desc) == DEFINE_PEEPHOLE) |
---|
787 | { |
---|
788 | ++insn_code_number; |
---|
789 | } |
---|
790 | ++insn_index_number; |
---|
791 | } |
---|
792 | |
---|
793 | /* Write out the routine to add CLOBBERs to a pattern. */ |
---|
794 | output_add_clobbers (); |
---|
795 | |
---|
796 | /* Write the routine to initialize mov_optab for the EXTRA_CC_MODES. */ |
---|
797 | output_init_mov_optab (); |
---|
798 | |
---|
799 | fflush (stdout); |
---|
800 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
---|
801 | /* NOTREACHED */ |
---|
802 | return 0; |
---|
803 | } |
---|