Mercurial > hg > CbC > CbC_gcc
annotate gcc/genattr.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | 77e2b8dfacca |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Generate attribute information (insn-attr.h) from machine description. |
|
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|
2 Copyright (C) 1991, 1994, 1996, 1998, 1999, 2000, 2003, 2004, 2007, 2008, |
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3 2010 Free Software Foundation, Inc. |
| 0 | 4 Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) |
| 5 | |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it under | |
| 9 the terms of the GNU General Public License as published by the Free | |
| 10 Software Foundation; either version 3, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 | |
| 23 #include "bconfig.h" | |
| 24 #include "system.h" | |
| 25 #include "coretypes.h" | |
| 26 #include "tm.h" | |
| 27 #include "rtl.h" | |
| 28 #include "errors.h" | |
|
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29 #include "read-md.h" |
| 0 | 30 #include "gensupport.h" |
| 31 | |
| 32 | |
| 33 static void write_upcase (const char *); | |
| 34 static void gen_attr (rtx); | |
| 35 | |
| 36 static void | |
| 37 write_upcase (const char *str) | |
| 38 { | |
| 39 for (; *str; str++) | |
| 40 putchar (TOUPPER(*str)); | |
| 41 } | |
| 42 | |
|
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43 static VEC (rtx, heap) *const_attrs, *reservations; |
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44 |
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45 |
| 0 | 46 static void |
| 47 gen_attr (rtx attr) | |
| 48 { | |
| 49 const char *p, *tag; | |
| 50 int is_const = GET_CODE (XEXP (attr, 2)) == CONST; | |
| 51 | |
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52 if (is_const) |
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53 VEC_safe_push (rtx, heap, const_attrs, attr); |
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54 |
| 0 | 55 printf ("#define HAVE_ATTR_%s\n", XSTR (attr, 0)); |
| 56 | |
| 57 /* If numeric attribute, don't need to write an enum. */ | |
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58 if (GET_CODE (attr) == DEFINE_ENUM_ATTR) |
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59 printf ("extern enum %s get_attr_%s (%s);\n\n", |
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60 XSTR (attr, 1), XSTR (attr, 0), (is_const ? "void" : "rtx")); |
| 0 | 61 else |
| 62 { | |
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63 p = XSTR (attr, 1); |
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64 if (*p == '\0') |
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65 printf ("extern int get_attr_%s (%s);\n", XSTR (attr, 0), |
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66 (is_const ? "void" : "rtx")); |
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67 else |
| 0 | 68 { |
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69 printf ("enum attr_%s {", XSTR (attr, 0)); |
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70 |
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71 while ((tag = scan_comma_elt (&p)) != 0) |
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72 { |
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73 write_upcase (XSTR (attr, 0)); |
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74 putchar ('_'); |
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75 while (tag != p) |
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76 putchar (TOUPPER (*tag++)); |
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77 if (*p == ',') |
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78 fputs (", ", stdout); |
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79 } |
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80 fputs ("};\n", stdout); |
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81 |
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82 printf ("extern enum attr_%s get_attr_%s (%s);\n\n", |
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83 XSTR (attr, 0), XSTR (attr, 0), (is_const ? "void" : "rtx")); |
| 0 | 84 } |
| 85 } | |
| 86 | |
| 87 /* If `length' attribute, write additional function definitions and define | |
| 88 variables used by `insn_current_length'. */ | |
| 89 if (! strcmp (XSTR (attr, 0), "length")) | |
| 90 { | |
| 91 puts ("\ | |
| 92 extern void shorten_branches (rtx);\n\ | |
| 93 extern int insn_default_length (rtx);\n\ | |
| 94 extern int insn_min_length (rtx);\n\ | |
| 95 extern int insn_variable_length_p (rtx);\n\ | |
| 96 extern int insn_current_length (rtx);\n\n\ | |
| 97 #include \"insn-addr.h\"\n"); | |
| 98 } | |
| 99 } | |
| 100 | |
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101 /* Check that attribute NAME is used in define_insn_reservation condition |
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102 EXP. Return true if it is. */ |
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103 static bool |
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104 check_tune_attr (const char *name, rtx exp) |
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105 { |
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106 switch (GET_CODE (exp)) |
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107 { |
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108 case AND: |
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109 if (check_tune_attr (name, XEXP (exp, 0))) |
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110 return true; |
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111 return check_tune_attr (name, XEXP (exp, 1)); |
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112 |
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113 case IOR: |
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114 return (check_tune_attr (name, XEXP (exp, 0)) |
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115 && check_tune_attr (name, XEXP (exp, 1))); |
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116 |
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117 case EQ_ATTR: |
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118 return strcmp (XSTR (exp, 0), name) == 0; |
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119 |
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120 default: |
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121 return false; |
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122 } |
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123 } |
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124 |
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125 /* Try to find a const attribute (usually cpu or tune) that is used |
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126 in all define_insn_reservation conditions. */ |
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127 static bool |
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128 find_tune_attr (rtx exp) |
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129 { |
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130 unsigned int i; |
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131 rtx attr; |
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132 |
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133 switch (GET_CODE (exp)) |
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134 { |
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135 case AND: |
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136 case IOR: |
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137 if (find_tune_attr (XEXP (exp, 0))) |
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138 return true; |
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139 return find_tune_attr (XEXP (exp, 1)); |
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140 |
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141 case EQ_ATTR: |
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142 if (strcmp (XSTR (exp, 0), "alternative") == 0) |
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143 return false; |
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144 |
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145 FOR_EACH_VEC_ELT (rtx, const_attrs, i, attr) |
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146 if (strcmp (XSTR (attr, 0), XSTR (exp, 0)) == 0) |
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147 { |
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148 unsigned int j; |
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149 rtx resv; |
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150 |
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151 FOR_EACH_VEC_ELT (rtx, reservations, j, resv) |
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152 if (! check_tune_attr (XSTR (attr, 0), XEXP (resv, 2))) |
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153 return false; |
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154 return true; |
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155 } |
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156 return false; |
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157 |
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158 default: |
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159 return false; |
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160 } |
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161 } |
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162 |
| 0 | 163 int |
| 164 main (int argc, char **argv) | |
| 165 { | |
| 166 rtx desc; | |
| 167 int have_delay = 0; | |
| 168 int have_annul_true = 0; | |
| 169 int have_annul_false = 0; | |
| 170 int num_insn_reservations = 0; | |
| 171 int i; | |
| 172 | |
| 173 progname = "genattr"; | |
| 174 | |
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175 if (!init_rtx_reader_args (argc, argv)) |
| 0 | 176 return (FATAL_EXIT_CODE); |
| 177 | |
| 178 puts ("/* Generated automatically by the program `genattr'"); | |
| 179 puts (" from the machine description file `md'. */\n"); | |
| 180 puts ("#ifndef GCC_INSN_ATTR_H"); | |
| 181 puts ("#define GCC_INSN_ATTR_H\n"); | |
| 182 | |
| 183 /* For compatibility, define the attribute `alternative', which is just | |
| 184 a reference to the variable `which_alternative'. */ | |
| 185 | |
| 186 puts ("#define HAVE_ATTR_alternative"); | |
| 187 puts ("#define get_attr_alternative(insn) which_alternative"); | |
| 188 | |
| 189 /* Read the machine description. */ | |
| 190 | |
| 191 while (1) | |
| 192 { | |
| 193 int line_no, insn_code_number; | |
| 194 | |
| 195 desc = read_md_rtx (&line_no, &insn_code_number); | |
| 196 if (desc == NULL) | |
| 197 break; | |
| 198 | |
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199 if (GET_CODE (desc) == DEFINE_ATTR |
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200 || GET_CODE (desc) == DEFINE_ENUM_ATTR) |
| 0 | 201 gen_attr (desc); |
| 202 | |
| 203 else if (GET_CODE (desc) == DEFINE_DELAY) | |
| 204 { | |
| 205 if (! have_delay) | |
| 206 { | |
| 207 printf ("#define DELAY_SLOTS\n"); | |
| 208 printf ("extern int num_delay_slots (rtx);\n"); | |
| 209 printf ("extern int eligible_for_delay (rtx, int, rtx, int);\n\n"); | |
| 210 printf ("extern int const_num_delay_slots (rtx);\n\n"); | |
| 211 have_delay = 1; | |
| 212 } | |
| 213 | |
| 214 for (i = 0; i < XVECLEN (desc, 1); i += 3) | |
| 215 { | |
| 216 if (XVECEXP (desc, 1, i + 1) && ! have_annul_true) | |
| 217 { | |
| 218 printf ("#define ANNUL_IFTRUE_SLOTS\n"); | |
| 219 printf ("extern int eligible_for_annul_true (rtx, int, rtx, int);\n"); | |
| 220 have_annul_true = 1; | |
| 221 } | |
| 222 | |
| 223 if (XVECEXP (desc, 1, i + 2) && ! have_annul_false) | |
| 224 { | |
| 225 printf ("#define ANNUL_IFFALSE_SLOTS\n"); | |
| 226 printf ("extern int eligible_for_annul_false (rtx, int, rtx, int);\n"); | |
| 227 have_annul_false = 1; | |
| 228 } | |
| 229 } | |
| 230 } | |
| 231 | |
| 232 else if (GET_CODE (desc) == DEFINE_INSN_RESERVATION) | |
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233 { |
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234 num_insn_reservations++; |
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235 VEC_safe_push (rtx, heap, reservations, desc); |
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236 } |
| 0 | 237 } |
| 238 | |
| 239 if (num_insn_reservations > 0) | |
| 240 { | |
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241 bool has_tune_attr |
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242 = find_tune_attr (XEXP (VEC_index (rtx, reservations, 0), 2)); |
| 0 | 243 /* Output interface for pipeline hazards recognition based on |
| 244 DFA (deterministic finite state automata. */ | |
| 245 printf ("\n#define INSN_SCHEDULING\n"); | |
| 246 printf ("\n/* DFA based pipeline interface. */"); | |
| 247 printf ("\n#ifndef AUTOMATON_ALTS\n"); | |
| 248 printf ("#define AUTOMATON_ALTS 0\n"); | |
| 249 printf ("#endif\n\n"); | |
| 250 printf ("\n#ifndef AUTOMATON_STATE_ALTS\n"); | |
| 251 printf ("#define AUTOMATON_STATE_ALTS 0\n"); | |
| 252 printf ("#endif\n\n"); | |
| 253 printf ("#ifndef CPU_UNITS_QUERY\n"); | |
| 254 printf ("#define CPU_UNITS_QUERY 0\n"); | |
| 255 printf ("#endif\n\n"); | |
| 256 /* Interface itself: */ | |
|
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257 if (has_tune_attr) |
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258 { |
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259 printf ("/* Initialize fn pointers for internal_dfa_insn_code\n"); |
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260 printf (" and insn_default_latency. */\n"); |
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261 printf ("extern void init_sched_attrs (void);\n\n"); |
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262 printf ("/* Internal insn code number used by automata. */\n"); |
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263 printf ("extern int (*internal_dfa_insn_code) (rtx);\n\n"); |
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264 printf ("/* Insn latency time defined in define_insn_reservation. */\n"); |
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265 printf ("extern int (*insn_default_latency) (rtx);\n\n"); |
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266 } |
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267 else |
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268 { |
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269 printf ("#define init_sched_attrs() do { } while (0)\n\n"); |
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270 printf ("/* Internal insn code number used by automata. */\n"); |
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271 printf ("extern int internal_dfa_insn_code (rtx);\n\n"); |
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272 printf ("/* Insn latency time defined in define_insn_reservation. */\n"); |
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273 printf ("extern int insn_default_latency (rtx);\n\n"); |
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274 } |
| 0 | 275 printf ("/* Return nonzero if there is a bypass for given insn\n"); |
| 276 printf (" which is a data producer. */\n"); | |
| 277 printf ("extern int bypass_p (rtx);\n\n"); | |
| 278 printf ("/* Insn latency time on data consumed by the 2nd insn.\n"); | |
| 279 printf (" Use the function if bypass_p returns nonzero for\n"); | |
| 280 printf (" the 1st insn. */\n"); | |
| 281 printf ("extern int insn_latency (rtx, rtx);\n\n"); | |
| 282 printf ("/* Maximal insn latency time possible of all bypasses for this insn.\n"); | |
| 283 printf (" Use the function if bypass_p returns nonzero for\n"); | |
| 284 printf (" the 1st insn. */\n"); | |
| 285 printf ("extern int maximal_insn_latency (rtx);\n\n"); | |
| 286 printf ("\n#if AUTOMATON_ALTS\n"); | |
| 287 printf ("/* The following function returns number of alternative\n"); | |
| 288 printf (" reservations of given insn. It may be used for better\n"); | |
| 289 printf (" insns scheduling heuristics. */\n"); | |
| 290 printf ("extern int insn_alts (rtx);\n\n"); | |
| 291 printf ("#endif\n\n"); | |
| 292 printf ("/* Maximal possible number of insns waiting results being\n"); | |
| 293 printf (" produced by insns whose execution is not finished. */\n"); | |
| 294 printf ("extern const int max_insn_queue_index;\n\n"); | |
| 295 printf ("/* Pointer to data describing current state of DFA. */\n"); | |
| 296 printf ("typedef void *state_t;\n\n"); | |
| 297 printf ("/* Size of the data in bytes. */\n"); | |
| 298 printf ("extern int state_size (void);\n\n"); | |
| 299 printf ("/* Initiate given DFA state, i.e. Set up the state\n"); | |
| 300 printf (" as all functional units were not reserved. */\n"); | |
| 301 printf ("extern void state_reset (state_t);\n"); | |
| 302 printf ("/* The following function returns negative value if given\n"); | |
| 303 printf (" insn can be issued in processor state described by given\n"); | |
| 304 printf (" DFA state. In this case, the DFA state is changed to\n"); | |
| 305 printf (" reflect the current and future reservations by given\n"); | |
| 306 printf (" insn. Otherwise the function returns minimal time\n"); | |
| 307 printf (" delay to issue the insn. This delay may be zero\n"); | |
| 308 printf (" for superscalar or VLIW processors. If the second\n"); | |
| 309 printf (" parameter is NULL the function changes given DFA state\n"); | |
| 310 printf (" as new processor cycle started. */\n"); | |
| 311 printf ("extern int state_transition (state_t, rtx);\n"); | |
| 312 printf ("\n#if AUTOMATON_STATE_ALTS\n"); | |
| 313 printf ("/* The following function returns number of possible\n"); | |
| 314 printf (" alternative reservations of given insn in given\n"); | |
| 315 printf (" DFA state. It may be used for better insns scheduling\n"); | |
| 316 printf (" heuristics. By default the function is defined if\n"); | |
| 317 printf (" macro AUTOMATON_STATE_ALTS is defined because its\n"); | |
| 318 printf (" implementation may require much memory. */\n"); | |
| 319 printf ("extern int state_alts (state_t, rtx);\n"); | |
| 320 printf ("#endif\n\n"); | |
| 321 printf ("extern int min_issue_delay (state_t, rtx);\n"); | |
| 322 printf ("/* The following function returns nonzero if no one insn\n"); | |
| 323 printf (" can be issued in current DFA state. */\n"); | |
| 324 printf ("extern int state_dead_lock_p (state_t);\n"); | |
| 325 printf ("/* The function returns minimal delay of issue of the 2nd\n"); | |
| 326 printf (" insn after issuing the 1st insn in given DFA state.\n"); | |
| 327 printf (" The 1st insn should be issued in given state (i.e.\n"); | |
| 328 printf (" state_transition should return negative value for\n"); | |
| 329 printf (" the insn and the state). Data dependencies between\n"); | |
| 330 printf (" the insns are ignored by the function. */\n"); | |
| 331 printf | |
| 332 ("extern int min_insn_conflict_delay (state_t, rtx, rtx);\n"); | |
| 333 printf ("/* The following function outputs reservations for given\n"); | |
| 334 printf (" insn as they are described in the corresponding\n"); | |
| 335 printf (" define_insn_reservation. */\n"); | |
| 336 printf ("extern void print_reservation (FILE *, rtx);\n"); | |
| 337 printf ("\n#if CPU_UNITS_QUERY\n"); | |
| 338 printf ("/* The following function returns code of functional unit\n"); | |
| 339 printf (" with given name (see define_cpu_unit). */\n"); | |
| 340 printf ("extern int get_cpu_unit_code (const char *);\n"); | |
| 341 printf ("/* The following function returns nonzero if functional\n"); | |
| 342 printf (" unit with given code is currently reserved in given\n"); | |
| 343 printf (" DFA state. */\n"); | |
| 344 printf ("extern int cpu_unit_reservation_p (state_t, int);\n"); | |
| 345 printf ("#endif\n\n"); | |
| 346 printf ("/* The following function returns true if insn\n"); | |
| 347 printf (" has a dfa reservation. */\n"); | |
| 348 printf ("extern bool insn_has_dfa_reservation_p (rtx);\n\n"); | |
| 349 printf ("/* Clean insn code cache. It should be called if there\n"); | |
| 350 printf (" is a chance that condition value in a\n"); | |
| 351 printf (" define_insn_reservation will be changed after\n"); | |
| 352 printf (" last call of dfa_start. */\n"); | |
| 353 printf ("extern void dfa_clean_insn_cache (void);\n\n"); | |
|
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354 printf ("extern void dfa_clear_single_insn_cache (rtx);\n\n"); |
| 0 | 355 printf ("/* Initiate and finish work with DFA. They should be\n"); |
| 356 printf (" called as the first and the last interface\n"); | |
| 357 printf (" functions. */\n"); | |
| 358 printf ("extern void dfa_start (void);\n"); | |
| 359 printf ("extern void dfa_finish (void);\n"); | |
| 360 } | |
| 361 else | |
| 362 { | |
| 363 /* Otherwise we do no scheduling, but we need these typedefs | |
| 364 in order to avoid uglifying other code with more ifdefs. */ | |
| 365 printf ("typedef void *state_t;\n\n"); | |
| 366 } | |
| 367 | |
| 368 /* Output flag masks for use by reorg. | |
| 369 | |
| 370 Flags are used to hold branch direction and prediction information | |
| 371 for use by eligible_for_... */ | |
| 372 printf("\n#define ATTR_FLAG_forward\t0x1\n"); | |
| 373 printf("#define ATTR_FLAG_backward\t0x2\n"); | |
| 374 printf("#define ATTR_FLAG_likely\t0x4\n"); | |
| 375 printf("#define ATTR_FLAG_very_likely\t0x8\n"); | |
| 376 printf("#define ATTR_FLAG_unlikely\t0x10\n"); | |
| 377 printf("#define ATTR_FLAG_very_unlikely\t0x20\n"); | |
| 378 | |
| 379 puts("\n#endif /* GCC_INSN_ATTR_H */"); | |
| 380 | |
| 381 if (ferror (stdout) || fflush (stdout) || fclose (stdout)) | |
| 382 return FATAL_EXIT_CODE; | |
| 383 | |
| 384 return SUCCESS_EXIT_CODE; | |
| 385 } |