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   "movstr_optab[$A] = CODE_FOR_$(movstr$a$)",
 166   "clrstr_optab[$A] = CODE_FOR_$(clrstr$a$)",
 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_VECTOR_FLOAT))
 268                       break;
 269                   }
 270
 271                 if (i < 0)
 272                   matches = 0;
 273                 else if (*pp == 'a')
 274                   m1 = i, np += strlen (GET_MODE_NAME(i));
 275                 else
 276                   m2 = i, np += strlen (GET_MODE_NAME(i));
 277
 278                 force_int = force_partial_int = force_float = 0;
 279                 break;
 280
 281               default:
 282                 abort ();
 283               }
 284         }
 285
 286       if (matches && pp[0] == '$' && pp[1] == ')'
 287           && *np == 0
 288           && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
 289         break;
 290     }
 291
 292   if (pindex == ARRAY_SIZE (optabs))
 293     return;
 294
 295   /* We found a match.  If this pattern is only conditionally present,
 296      write out the "if" and two extra blanks.  */
 297
 298   if (*XSTR (insn, 2) != 0)
 299     printf ("  if (HAVE_%s)\n  ", name);
 300
 301   printf ("  ");
 302
 303   /* Now write out the initialization, making all required substitutions.  */
 304   for (pp = optabs[pindex]; *pp; pp++)
 305     {
 306       if (*pp != '$')
 307         putchar (*pp);
 308       else
 309         switch (*++pp)
 310           {
 311           case '(':  case ')':
 312           case 'I':  case 'F':  case 'N':
 313             break;
 314           case 'V':
 315             if (GET_MODE_CLASS (m1) == MODE_FLOAT)
 316               printf ("v");
 317             break;
 318           case 'a':
 319             for (np = GET_MODE_NAME(m1); *np; np++)
 320               putchar (TOLOWER (*np));
 321             break;
 322           case 'b':
 323             for (np = GET_MODE_NAME(m2); *np; np++)
 324               putchar (TOLOWER (*np));
 325             break;
 326           case 'A':
 327             printf ("%smode", GET_MODE_NAME(m1));
 328             break;
 329           case 'B':
 330             printf ("%smode", GET_MODE_NAME(m2));
 331             break;
 332           case 'c':
 333             printf ("%s", GET_RTX_NAME(op));
 334             break;
 335           case 'C':
 336             for (np = GET_RTX_NAME(op); *np; np++)
 337               putchar (TOUPPER (*np));
 338             break;
 339           }
 340     }
 341
 342   printf (";\n");
 343 }
 344
 345 extern int main (int, char **);
 346
 347 int
 348 main (int argc, char **argv)
 349 {
 350   rtx desc;
 351
 352   progname = "genopinit";
 353
 354   if (argc <= 1)
 355     fatal ("no input file name");
 356
 357   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
 358     return (FATAL_EXIT_CODE);
 359
 360   printf ("/* Generated automatically by the program `genopinit'\n\
 361 from the machine description file `md'.  */\n\n");
 362
 363   printf ("#include \"config.h\"\n");
 364   printf ("#include \"system.h\"\n");
 365   printf ("#include \"coretypes.h\"\n");
 366   printf ("#include \"tm.h\"\n");
 367   printf ("#include \"rtl.h\"\n");
 368   printf ("#include \"flags.h\"\n");
 369   printf ("#include \"insn-config.h\"\n");
 370   printf ("#include \"recog.h\"\n");
 371   printf ("#include \"expr.h\"\n");
 372   printf ("#include \"optabs.h\"\n");
 373   printf ("#include \"reload.h\"\n\n");
 374
 375   printf ("void\ninit_all_optabs (void)\n{\n");
 376
 377   puts ("\
 378 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 379   int i, j;\n\
 380 #endif\n");
 381
 382   /* Read the machine description.  */
 383
 384   while (1)
 385     {
 386       int line_no, insn_code_number = 0;
 387
 388       desc = read_md_rtx (&line_no, &insn_code_number);
 389       if (desc == NULL)
 390         break;
 391
 392       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 393         gen_insn (desc);
 394     }
 395
 396   puts ("\
 397 \n\
 398 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 399   /* This flag says the same insns that convert to a signed fixnum\n\
 400      also convert validly to an unsigned one.  */\n\
 401   for (i = 0; i < NUM_MACHINE_MODES; i++)\n\
 402     for (j = 0; j < NUM_MACHINE_MODES; j++)\n\
 403       ufixtrunc_optab->handlers[i][j].insn_code\n\
 404       = sfixtrunc_optab->handlers[i][j].insn_code;\n\
 405 #endif\n\
 406 }");
 407
 408   fflush (stdout);
 409   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 410 }
 411
 412 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 413 const char *
 414 get_insn_name (int code ATTRIBUTE_UNUSED)
 415 {
 416   return NULL;
 417 }