gcc/genopinit.c

   1 /* Generate code to initialize optabs from machine description.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  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"
  29 #include "gensupport.h"
  30
  31
  32 /* Many parts of GCC use arrays that are indexed by machine mode and
  33    contain the insn codes for pattern in the MD file that perform a given
  34    operation on operands of that mode.
  35
  36    These patterns are present in the MD file with names that contain
  37    the mode(s) used and the name of the operation.  This program
  38    writes a function `init_all_optabs' that initializes the optabs with
  39    all the insn codes of the relevant patterns present in the MD file.
  40
  41    This array contains a list of optabs that need to be initialized.  Within
  42    each string, the name of the pattern to be matched against is delimited
  43    with $( and $).  In the string, $a and $b are used to match a short mode
  44    name (the part of the mode name not including `mode' and converted to
  45    lower-case).  When writing out the initializer, the entire string is
  46    used.  $A and $B are replaced with the full name of the mode; $a and $b
  47    are replaced with the short form of the name, as above.
  48
  49    If $N is present in the pattern, it means the two modes must be consecutive
  50    widths in the same mode class (e.g, QImode and HImode).  $I means that
  51    only full integer modes should be considered for the next mode, and $F
  52    means that only float modes should be considered.
  53    $P means that both full and partial integer modes should be considered.
  54
  55    $V means to emit 'v' if the first mode is a MODE_FLOAT mode.
  56
  57    For some optabs, we store the operation by RTL codes.  These are only
  58    used for comparisons.  In that case, $c and $C are the lower-case and
  59    upper-case forms of the comparison, respectively.  */
  60
  61 static const char * const optabs[] =
  62 { "sext_optab->handlers[$B][$A].insn_code = CODE_FOR_$(extend$a$b2$)",
  63   "zext_optab->handlers[$B][$A].insn_code = CODE_FOR_$(zero_extend$a$b2$)",
  64   "sfix_optab->handlers[$B][$A].insn_code = CODE_FOR_$(fix$F$a$I$b2$)",
  65   "ufix_optab->handlers[$B][$A].insn_code = CODE_FOR_$(fixuns$F$a$b2$)",
  66   "sfixtrunc_optab->handlers[$B][$A].insn_code = CODE_FOR_$(fix_trunc$F$a$I$b2$)",
  67   "ufixtrunc_optab->handlers[$B][$A].insn_code = CODE_FOR_$(fixuns_trunc$F$a$I$b2$)",
  68   "sfloat_optab->handlers[$B][$A].insn_code = CODE_FOR_$(float$I$a$F$b2$)",
  69   "ufloat_optab->handlers[$B][$A].insn_code = CODE_FOR_$(floatuns$I$a$F$b2$)",
  70   "trunc_optab->handlers[$B][$A].insn_code = CODE_FOR_$(trunc$a$b2$)",
  71   "add_optab->handlers[$A].insn_code = CODE_FOR_$(add$P$a3$)",
  72   "addv_optab->handlers[$A].insn_code =\n\
  73     add_optab->handlers[$A].insn_code = CODE_FOR_$(add$F$a3$)",
  74   "addv_optab->handlers[$A].insn_code = CODE_FOR_$(addv$I$a3$)",
  75   "sub_optab->handlers[$A].insn_code = CODE_FOR_$(sub$P$a3$)",
  76   "subv_optab->handlers[$A].insn_code =\n\
  77     sub_optab->handlers[$A].insn_code = CODE_FOR_$(sub$F$a3$)",
  78   "subv_optab->handlers[$A].insn_code = CODE_FOR_$(subv$I$a3$)",
  79   "smul_optab->handlers[$A].insn_code = CODE_FOR_$(mul$P$a3$)",
  80   "smulv_optab->handlers[$A].insn_code =\n\
  81     smul_optab->handlers[$A].insn_code = CODE_FOR_$(mul$F$a3$)",
  82   "smulv_optab->handlers[$A].insn_code = CODE_FOR_$(mulv$I$a3$)",
  83   "umul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(umul$a3_highpart$)",
  84   "smul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(smul$a3_highpart$)",
  85   "smul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(mul$a$b3$)$N",
  86   "umul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(umul$a$b3$)$N",
  87   "sdiv_optab->handlers[$A].insn_code = CODE_FOR_$(div$a3$)",
  88   "sdivv_optab->handlers[$A].insn_code = CODE_FOR_$(div$V$I$a3$)",
  89   "udiv_optab->handlers[$A].insn_code = CODE_FOR_$(udiv$I$a3$)",
  90   "sdivmod_optab->handlers[$A].insn_code = CODE_FOR_$(divmod$a4$)",
  91   "udivmod_optab->handlers[$A].insn_code = CODE_FOR_$(udivmod$a4$)",
  92   "smod_optab->handlers[$A].insn_code = CODE_FOR_$(mod$a3$)",
  93   "umod_optab->handlers[$A].insn_code = CODE_FOR_$(umod$a3$)",
  94   "fmod_optab->handlers[$A].insn_code = CODE_FOR_$(fmod$a3$)",
  95   "drem_optab->handlers[$A].insn_code = CODE_FOR_$(drem$a3$)",
  96   "ftrunc_optab->handlers[$A].insn_code = CODE_FOR_$(ftrunc$F$a2$)",
  97   "and_optab->handlers[$A].insn_code = CODE_FOR_$(and$a3$)",
  98   "ior_optab->handlers[$A].insn_code = CODE_FOR_$(ior$a3$)",
  99   "xor_optab->handlers[$A].insn_code = CODE_FOR_$(xor$a3$)",
 100   "ashl_optab->handlers[$A].insn_code = CODE_FOR_$(ashl$a3$)",
 101   "ashr_optab->handlers[$A].insn_code = CODE_FOR_$(ashr$a3$)",
 102   "lshr_optab->handlers[$A].insn_code = CODE_FOR_$(lshr$a3$)",
 103   "rotl_optab->handlers[$A].insn_code = CODE_FOR_$(rotl$a3$)",
 104   "rotr_optab->handlers[$A].insn_code = CODE_FOR_$(rotr$a3$)",
 105   "smin_optab->handlers[$A].insn_code = CODE_FOR_$(smin$I$a3$)",
 106   "smin_optab->handlers[$A].insn_code = CODE_FOR_$(min$F$a3$)",
 107   "smax_optab->handlers[$A].insn_code = CODE_FOR_$(smax$I$a3$)",
 108   "smax_optab->handlers[$A].insn_code = CODE_FOR_$(max$F$a3$)",
 109   "umin_optab->handlers[$A].insn_code = CODE_FOR_$(umin$I$a3$)",
 110   "umax_optab->handlers[$A].insn_code = CODE_FOR_$(umax$I$a3$)",
 111   "pow_optab->handlers[$A].insn_code = CODE_FOR_$(pow$a3$)",
 112   "atan2_optab->handlers[$A].insn_code = CODE_FOR_$(atan2$a3$)",
 113   "neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$P$a2$)",
 114   "negv_optab->handlers[$A].insn_code =\n\
 115     neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$F$a2$)",
 116   "negv_optab->handlers[$A].insn_code = CODE_FOR_$(negv$I$a2$)",
 117   "abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$P$a2$)",
 118   "absv_optab->handlers[$A].insn_code =\n\
 119     abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$F$a2$)",
 120   "absv_optab->handlers[$A].insn_code = CODE_FOR_$(absv$I$a2$)",
 121   "sqrt_optab->handlers[$A].insn_code = CODE_FOR_$(sqrt$a2$)",
 122   "floor_optab->handlers[$A].insn_code = CODE_FOR_$(floor$a2$)",
 123   "ceil_optab->handlers[$A].insn_code = CODE_FOR_$(ceil$a2$)",
 124   "round_optab->handlers[$A].insn_code = CODE_FOR_$(round$a2$)",
 125   "trunc_optab->handlers[$A].insn_code = CODE_FOR_$(trunc$a2$)",
 126   "nearbyint_optab->handlers[$A].insn_code = CODE_FOR_$(nearbyint$a2$)",
 127   "sincos_optab->handlers[$A].insn_code = CODE_FOR_$(sincos$a3$)",
 128   "sin_optab->handlers[$A].insn_code = CODE_FOR_$(sin$a2$)",
 129   "asin_optab->handlers[$A].insn_code = CODE_FOR_$(asin$a2$)",
 130   "cos_optab->handlers[$A].insn_code = CODE_FOR_$(cos$a2$)",
 131   "acos_optab->handlers[$A].insn_code = CODE_FOR_$(acos$a2$)",
 132   "exp_optab->handlers[$A].insn_code = CODE_FOR_$(exp$a2$)",
 133   "exp10_optab->handlers[$A].insn_code = CODE_FOR_$(exp10$a2$)",
 134   "exp2_optab->handlers[$A].insn_code = CODE_FOR_$(exp2$a2$)",
 135   "expm1_optab->handlers[$A].insn_code = CODE_FOR_$(expm1$a2$)",
 136   "logb_optab->handlers[$A].insn_code = CODE_FOR_$(logb$a2$)",
 137   "ilogb_optab->handlers[$A].insn_code = CODE_FOR_$(ilogb$a2$)",
 138   "log_optab->handlers[$A].insn_code = CODE_FOR_$(log$a2$)",
 139   "log10_optab->handlers[$A].insn_code = CODE_FOR_$(log10$a2$)",
 140   "log2_optab->handlers[$A].insn_code = CODE_FOR_$(log2$a2$)",
 141   "log1p_optab->handlers[$A].insn_code = CODE_FOR_$(log1p$a2$)",
 142   "tan_optab->handlers[$A].insn_code = CODE_FOR_$(tan$a2$)",
 143   "atan_optab->handlers[$A].insn_code = CODE_FOR_$(atan$a2$)",
 144   "strlen_optab->handlers[$A].insn_code = CODE_FOR_$(strlen$a$)",
 145   "one_cmpl_optab->handlers[$A].insn_code = CODE_FOR_$(one_cmpl$a2$)",
 146   "ffs_optab->handlers[$A].insn_code = CODE_FOR_$(ffs$a2$)",
 147   "clz_optab->handlers[$A].insn_code = CODE_FOR_$(clz$a2$)",
 148   "ctz_optab->handlers[$A].insn_code = CODE_FOR_$(ctz$a2$)",
 149   "popcount_optab->handlers[$A].insn_code = CODE_FOR_$(popcount$a2$)",
 150   "parity_optab->handlers[$A].insn_code = CODE_FOR_$(parity$a2$)",
 151   "mov_optab->handlers[$A].insn_code = CODE_FOR_$(mov$a$)",
 152   "movstrict_optab->handlers[$A].insn_code = CODE_FOR_$(movstrict$a$)",
 153   "cmp_optab->handlers[$A].insn_code = CODE_FOR_$(cmp$a$)",
 154   "tst_optab->handlers[$A].insn_code = CODE_FOR_$(tst$a$)",
 155   "addcc_optab->handlers[$A].insn_code = CODE_FOR_$(add$acc$)",
 156   "bcc_gen_fctn[$C] = gen_$(b$c$)",
 157   "setcc_gen_code[$C] = CODE_FOR_$(s$c$)",
 158   "movcc_gen_code[$A] = CODE_FOR_$(mov$acc$)",
 159   "cbranch_optab->handlers[$A].insn_code = CODE_FOR_$(cbranch$a4$)",
 160   "cmov_optab->handlers[$A].insn_code = CODE_FOR_$(cmov$a6$)",
 161   "cstore_optab->handlers[$A].insn_code = CODE_FOR_$(cstore$a4$)",
 162   "push_optab->handlers[$A].insn_code = CODE_FOR_$(push$a1$)",
 163   "reload_in_optab[$A] = CODE_FOR_$(reload_in$a$)",
 164   "reload_out_optab[$A] = CODE_FOR_$(reload_out$a$)",
 165   "movmem_optab[$A] = CODE_FOR_$(movmem$a$)",
 166   "clrmem_optab[$A] = CODE_FOR_$(clrmem$a$)",
 167   "cmpstr_optab[$A] = CODE_FOR_$(cmpstr$a$)",
 168   "cmpmem_optab[$A] = CODE_FOR_$(cmpmem$a$)",
 169   "vec_set_optab->handlers[$A].insn_code = CODE_FOR_$(vec_set$a$)",
 170   "vec_extract_optab->handlers[$A].insn_code = CODE_FOR_$(vec_extract$a$)",
 171   "vec_init_optab->handlers[$A].insn_code = CODE_FOR_$(vec_init$a$)" };
 172
 173 static void gen_insn (rtx);
 174
 175 static void
 176 gen_insn (rtx insn)
 177 {
 178   const char *name = XSTR (insn, 0);
 179   int m1 = 0, m2 = 0, op = 0;
 180   size_t pindex;
 181   int i;
 182   const char *np, *pp, *p, *q;
 183
 184   /* Don't mention instructions whose names are the null string.
 185      They are in the machine description just to be recognized.  */
 186   if (*name == 0)
 187     return;
 188
 189   /* See if NAME matches one of the patterns we have for the optabs we know
 190      about.  */
 191
 192   for (pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++)
 193     {
 194       int force_float = 0, force_int = 0, force_partial_int = 0;
 195       int force_consec = 0;
 196       int matches = 1;
 197
 198       for (pp = optabs[pindex]; pp[0] != '$' || pp[1] != '('; pp++)
 199         ;
 200
 201       for (pp += 2, np = name; matches && ! (pp[0] == '$' && pp[1] == ')');
 202            pp++)
 203         {
 204           if (*pp != '$')
 205             {
 206               if (*pp != *np++)
 207                 break;
 208             }
 209           else
 210             switch (*++pp)
 211               {
 212               case 'N':
 213                 force_consec = 1;
 214                 break;
 215               case 'I':
 216                 force_int = 1;
 217                 break;
 218               case 'P':
 219                 force_partial_int = 1;
 220                 break;
 221               case 'F':
 222                 force_float = 1;
 223                 break;
 224               case 'V':
 225                 break;
 226               case 'c':
 227                 for (op = 0; op < NUM_RTX_CODE; op++)
 228                   {
 229                     for (p = GET_RTX_NAME(op), q = np; *p; p++, q++)
 230                       if (*p != *q)
 231                         break;
 232
 233                     /* We have to be concerned about matching "gt" and
 234                        missing "gtu", e.g., so verify we have reached the
 235                        end of thing we are to match.  */
 236                     if (*p == 0 && *q == 0
 237                         && (GET_RTX_CLASS (op) == RTX_COMPARE
 238                             || GET_RTX_CLASS (op) == RTX_COMM_COMPARE))
 239                       break;
 240                   }
 241
 242                 if (op == NUM_RTX_CODE)
 243                   matches = 0;
 244                 else
 245                   np += strlen (GET_RTX_NAME(op));
 246                 break;
 247               case 'a':
 248               case 'b':
 249                 /* This loop will stop at the first prefix match, so
 250                    look through the modes in reverse order, in case
 251                    there are extra CC modes and CC is a prefix of the
 252                    CC modes (as it should be).  */
 253                 for (i = (MAX_MACHINE_MODE) - 1; i >= 0; i--)
 254                   {
 255                     for (p = GET_MODE_NAME(i), q = np; *p; p++, q++)
 256                       if (TOLOWER (*p) != *q)
 257                         break;
 258
 259                     if (*p == 0
 260                         && (! force_int || mode_class[i] == MODE_INT
 261                             || mode_class[i] == MODE_VECTOR_INT)
 262                         && (! force_partial_int
 263                             || mode_class[i] == MODE_INT
 264                             || mode_class[i] == MODE_PARTIAL_INT
 265                             || mode_class[i] == MODE_VECTOR_INT)
 266                         && (! force_float || mode_class[i] == MODE_FLOAT
 267                             || mode_class[i] == MODE_COMPLEX_FLOAT
 268                             || mode_class[i] == MODE_VECTOR_FLOAT))
 269                       break;
 270                   }
 271
 272                 if (i < 0)
 273                   matches = 0;
 274                 else if (*pp == 'a')
 275                   m1 = i, np += strlen (GET_MODE_NAME(i));
 276                 else
 277                   m2 = i, np += strlen (GET_MODE_NAME(i));
 278
 279                 force_int = force_partial_int = force_float = 0;
 280                 break;
 281
 282               default:
 283                 abort ();
 284               }
 285         }
 286
 287       if (matches && pp[0] == '$' && pp[1] == ')'
 288           && *np == 0
 289           && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
 290         break;
 291     }
 292
 293   if (pindex == ARRAY_SIZE (optabs))
 294     return;
 295
 296   /* We found a match.  If this pattern is only conditionally present,
 297      write out the "if" and two extra blanks.  */
 298
 299   if (*XSTR (insn, 2) != 0)
 300     printf ("  if (HAVE_%s)\n  ", name);
 301
 302   printf ("  ");
 303
 304   /* Now write out the initialization, making all required substitutions.  */
 305   for (pp = optabs[pindex]; *pp; pp++)
 306     {
 307       if (*pp != '$')
 308         putchar (*pp);
 309       else
 310         switch (*++pp)
 311           {
 312           case '(':  case ')':
 313           case 'I':  case 'F':  case 'N':
 314             break;
 315           case 'V':
 316             if (GET_MODE_CLASS (m1) == MODE_FLOAT)
 317               printf ("v");
 318             break;
 319           case 'a':
 320             for (np = GET_MODE_NAME(m1); *np; np++)
 321               putchar (TOLOWER (*np));
 322             break;
 323           case 'b':
 324             for (np = GET_MODE_NAME(m2); *np; np++)
 325               putchar (TOLOWER (*np));
 326             break;
 327           case 'A':
 328             printf ("%smode", GET_MODE_NAME(m1));
 329             break;
 330           case 'B':
 331             printf ("%smode", GET_MODE_NAME(m2));
 332             break;
 333           case 'c':
 334             printf ("%s", GET_RTX_NAME(op));
 335             break;
 336           case 'C':
 337             for (np = GET_RTX_NAME(op); *np; np++)
 338               putchar (TOUPPER (*np));
 339             break;
 340           }
 341     }
 342
 343   printf (";\n");
 344 }
 345
 346 extern int main (int, char **);
 347
 348 int
 349 main (int argc, char **argv)
 350 {
 351   rtx desc;
 352
 353   progname = "genopinit";
 354
 355   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
 356     return (FATAL_EXIT_CODE);
 357
 358   printf ("/* Generated automatically by the program `genopinit'\n\
 359 from the machine description file `md'.  */\n\n");
 360
 361   printf ("#include \"config.h\"\n");
 362   printf ("#include \"system.h\"\n");
 363   printf ("#include \"coretypes.h\"\n");
 364   printf ("#include \"tm.h\"\n");
 365   printf ("#include \"rtl.h\"\n");
 366   printf ("#include \"flags.h\"\n");
 367   printf ("#include \"insn-config.h\"\n");
 368   printf ("#include \"recog.h\"\n");
 369   printf ("#include \"expr.h\"\n");
 370   printf ("#include \"optabs.h\"\n");
 371   printf ("#include \"reload.h\"\n\n");
 372
 373   printf ("void\ninit_all_optabs (void)\n{\n");
 374
 375   puts ("\
 376 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 377   int i, j;\n\
 378 #endif\n");
 379
 380   /* Read the machine description.  */
 381
 382   while (1)
 383     {
 384       int line_no, insn_code_number = 0;
 385
 386       desc = read_md_rtx (&line_no, &insn_code_number);
 387       if (desc == NULL)
 388         break;
 389
 390       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 391         gen_insn (desc);
 392     }
 393
 394   puts ("\
 395 \n\
 396 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 397   /* This flag says the same insns that convert to a signed fixnum\n\
 398      also convert validly to an unsigned one.  */\n\
 399   for (i = 0; i < NUM_MACHINE_MODES; i++)\n\
 400     for (j = 0; j < NUM_MACHINE_MODES; j++)\n\
 401       ufixtrunc_optab->handlers[i][j].insn_code\n\
 402       = sfixtrunc_optab->handlers[i][j].insn_code;\n\
 403 #endif\n\
 404 }");
 405
 406   fflush (stdout);
 407   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 408 }
 409
 410 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 411 const char *
 412 get_insn_name (int code ATTRIBUTE_UNUSED)
 413 {
 414   return NULL;
 415 }