1 | /* Generate from machine description: |
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2 | |
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3 | - some flags HAVE_... saying which simple standard instructions are |
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4 | available for this machine. |
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5 | Copyright (C) 1987, 1991, 1995 Free Software Foundation, Inc. |
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6 | |
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7 | This file is part of GNU CC. |
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8 | |
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9 | GNU CC is free software; you can redistribute it and/or modify |
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10 | it under the terms of the GNU General Public License as published by |
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11 | the Free Software Foundation; either version 2, or (at your option) |
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12 | any later version. |
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13 | |
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14 | GNU CC is distributed in the hope that it will be useful, |
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15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | GNU General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU General Public License |
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20 | along with GNU CC; see the file COPYING. If not, write to |
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21 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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22 | Boston, MA 02111-1307, USA. */ |
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23 | |
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24 | |
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25 | #include <stdio.h> |
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26 | #include "hconfig.h" |
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27 | #include "rtl.h" |
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28 | #include "obstack.h" |
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29 | |
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30 | static struct obstack obstack; |
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31 | struct obstack *rtl_obstack = &obstack; |
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32 | |
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33 | #define obstack_chunk_alloc xmalloc |
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34 | #define obstack_chunk_free free |
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35 | |
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36 | extern void free (); |
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37 | extern rtx read_rtx (); |
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38 | |
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39 | char *xmalloc (); |
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40 | static void fatal (); |
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41 | void fancy_abort (); |
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42 | |
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43 | /* Names for patterns. Need to allow linking with print-rtl. */ |
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44 | char **insn_name_ptr; |
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45 | |
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46 | /* Obstacks to remember normal, and call insns. */ |
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47 | static struct obstack call_obstack, normal_obstack; |
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48 | |
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49 | /* Max size of names encountered. */ |
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50 | static int max_id_len; |
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51 | |
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52 | /* Count the number of match_operand's found. */ |
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53 | |
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54 | static int |
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55 | num_operands (x) |
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56 | rtx x; |
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57 | { |
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58 | int count = 0; |
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59 | int i, j; |
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60 | enum rtx_code code = GET_CODE (x); |
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61 | char *format_ptr = GET_RTX_FORMAT (code); |
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62 | |
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63 | if (code == MATCH_OPERAND) |
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64 | return 1; |
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65 | |
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66 | if (code == MATCH_OPERATOR || code == MATCH_PARALLEL) |
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67 | count++; |
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68 | |
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69 | for (i = 0; i < GET_RTX_LENGTH (code); i++) |
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70 | { |
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71 | switch (*format_ptr++) |
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72 | { |
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73 | case 'u': |
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74 | case 'e': |
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75 | count += num_operands (XEXP (x, i)); |
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76 | break; |
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77 | |
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78 | case 'E': |
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79 | if (XVEC (x, i) != NULL) |
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80 | for (j = 0; j < XVECLEN (x, i); j++) |
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81 | count += num_operands (XVECEXP (x, i, j)); |
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82 | |
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83 | break; |
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84 | } |
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85 | } |
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86 | |
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87 | return count; |
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88 | } |
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89 | |
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90 | /* Print out prototype information for a function. */ |
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91 | |
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92 | static void |
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93 | gen_proto (insn) |
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94 | rtx insn; |
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95 | { |
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96 | int num = num_operands (insn); |
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97 | printf ("extern rtx gen_%-*s PROTO((", max_id_len, XSTR (insn, 0)); |
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98 | |
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99 | if (num == 0) |
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100 | printf ("void"); |
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101 | else |
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102 | { |
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103 | while (num-- > 1) |
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104 | printf ("rtx, "); |
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105 | |
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106 | printf ("rtx"); |
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107 | } |
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108 | |
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109 | printf ("));\n"); |
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110 | } |
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111 | |
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112 | /* Print out a function declaration without a prototype. */ |
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113 | |
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114 | static void |
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115 | gen_nonproto (insn) |
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116 | rtx insn; |
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117 | { |
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118 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); |
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119 | } |
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120 | |
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121 | static void |
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122 | gen_insn (insn) |
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123 | rtx insn; |
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124 | { |
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125 | char *name = XSTR (insn, 0); |
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126 | char *p; |
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127 | struct obstack *obstack_ptr; |
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128 | int len; |
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129 | |
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130 | /* Don't mention instructions whose names are the null string |
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131 | or begin with '*'. They are in the machine description just |
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132 | to be recognized. */ |
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133 | if (name[0] == 0 || name[0] == '*') |
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134 | return; |
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135 | |
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136 | len = strlen (name); |
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137 | |
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138 | if (len > max_id_len) |
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139 | max_id_len = len; |
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140 | |
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141 | printf ("#define HAVE_%s ", name); |
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142 | if (strlen (XSTR (insn, 2)) == 0) |
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143 | printf ("1\n"); |
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144 | else |
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145 | { |
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146 | /* Write the macro definition, putting \'s at the end of each line, |
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147 | if more than one. */ |
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148 | printf ("("); |
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149 | for (p = XSTR (insn, 2); *p; p++) |
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150 | { |
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151 | if (*p == '\n') |
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152 | printf (" \\\n"); |
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153 | else |
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154 | printf ("%c", *p); |
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155 | } |
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156 | printf (")\n"); |
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157 | } |
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158 | |
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159 | /* Save the current insn, so that we can later put out appropriate |
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160 | prototypes. At present, most md files have the wrong number of |
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161 | arguments for the call insns (call, call_value, call_pop, |
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162 | call_value_pop) ignoring the extra arguments that are passed for |
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163 | some machines, so by default, turn off the prototype. */ |
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164 | |
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165 | obstack_ptr = (name[0] == 'c' |
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166 | && (!strcmp (name, "call") |
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167 | || !strcmp (name, "call_value") |
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168 | || !strcmp (name, "call_pop") |
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169 | || !strcmp (name, "call_value_pop"))) |
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170 | ? &call_obstack : &normal_obstack; |
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171 | |
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172 | obstack_grow (obstack_ptr, &insn, sizeof (rtx)); |
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173 | } |
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174 | |
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175 | char * |
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176 | xmalloc (size) |
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177 | unsigned size; |
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178 | { |
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179 | register char *val = (char *) malloc (size); |
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180 | |
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181 | if (val == 0) |
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182 | fatal ("virtual memory exhausted"); |
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183 | |
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184 | return val; |
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185 | } |
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186 | |
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187 | char * |
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188 | xrealloc (ptr, size) |
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189 | char *ptr; |
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190 | unsigned size; |
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191 | { |
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192 | char *result = (char *) realloc (ptr, size); |
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193 | if (!result) |
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194 | fatal ("virtual memory exhausted"); |
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195 | return result; |
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196 | } |
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197 | |
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198 | static void |
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199 | fatal (s, a1, a2) |
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200 | char *s; |
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201 | { |
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202 | fprintf (stderr, "genflags: "); |
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203 | fprintf (stderr, s, a1, a2); |
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204 | fprintf (stderr, "\n"); |
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205 | exit (FATAL_EXIT_CODE); |
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206 | } |
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207 | |
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208 | /* More 'friendly' abort that prints the line and file. |
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209 | config.h can #define abort fancy_abort if you like that sort of thing. */ |
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210 | |
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211 | void |
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212 | fancy_abort () |
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213 | { |
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214 | fatal ("Internal gcc abort."); |
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215 | } |
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216 | |
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217 | int |
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218 | main (argc, argv) |
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219 | int argc; |
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220 | char **argv; |
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221 | { |
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222 | rtx desc; |
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223 | rtx dummy; |
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224 | rtx *call_insns; |
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225 | rtx *normal_insns; |
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226 | rtx *insn_ptr; |
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227 | FILE *infile; |
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228 | register int c; |
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229 | |
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230 | obstack_init (rtl_obstack); |
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231 | obstack_init (&call_obstack); |
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232 | obstack_init (&normal_obstack); |
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233 | |
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234 | if (argc <= 1) |
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235 | fatal ("No input file name."); |
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236 | |
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237 | infile = fopen (argv[1], "r"); |
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238 | if (infile == 0) |
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239 | { |
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240 | perror (argv[1]); |
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241 | exit (FATAL_EXIT_CODE); |
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242 | } |
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243 | |
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244 | init_rtl (); |
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245 | |
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246 | printf ("/* Generated automatically by the program `genflags'\n\ |
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247 | from the machine description file `md'. */\n\n"); |
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248 | |
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249 | /* Read the machine description. */ |
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250 | |
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251 | while (1) |
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252 | { |
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253 | c = read_skip_spaces (infile); |
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254 | if (c == EOF) |
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255 | break; |
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256 | ungetc (c, infile); |
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257 | |
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258 | desc = read_rtx (infile); |
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259 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) |
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260 | gen_insn (desc); |
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261 | } |
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262 | |
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263 | /* Print out the prototypes now. */ |
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264 | dummy = (rtx) 0; |
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265 | obstack_grow (&call_obstack, &dummy, sizeof (rtx)); |
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266 | call_insns = (rtx *) obstack_finish (&call_obstack); |
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267 | |
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268 | obstack_grow (&normal_obstack, &dummy, sizeof (rtx)); |
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269 | normal_insns = (rtx *) obstack_finish (&normal_obstack); |
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270 | |
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271 | printf ("\n#ifndef NO_MD_PROTOTYPES\n"); |
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272 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) |
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273 | gen_proto (*insn_ptr); |
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274 | |
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275 | printf ("\n#ifdef MD_CALL_PROTOTYPES\n"); |
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276 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) |
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277 | gen_proto (*insn_ptr); |
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278 | |
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279 | printf ("\n#else /* !MD_CALL_PROTOTYPES */\n"); |
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280 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) |
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281 | gen_nonproto (*insn_ptr); |
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282 | |
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283 | printf ("#endif /* !MD_CALL_PROTOTYPES */\n"); |
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284 | printf ("\n#else /* NO_MD_PROTOTYPES */\n"); |
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285 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) |
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286 | gen_nonproto (*insn_ptr); |
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287 | |
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288 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) |
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289 | gen_nonproto (*insn_ptr); |
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290 | |
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291 | printf ("#endif /* NO_MD_PROTOTYPES */\n"); |
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292 | |
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293 | fflush (stdout); |
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294 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
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295 | /* NOTREACHED */ |
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296 | return 0; |
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297 | } |
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