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, 2005, 2006 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, 51 Franklin Street, Fifth Floor, Boston, MA
  20 02110-1301, 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   "usmul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(usmul$a$b3$)$N",
  88   "sdiv_optab->handlers[$A].insn_code = CODE_FOR_$(div$a3$)",
  89   "sdivv_optab->handlers[$A].insn_code = CODE_FOR_$(div$V$I$a3$)",
  90   "udiv_optab->handlers[$A].insn_code = CODE_FOR_$(udiv$I$a3$)",
  91   "sdivmod_optab->handlers[$A].insn_code = CODE_FOR_$(divmod$a4$)",
  92   "udivmod_optab->handlers[$A].insn_code = CODE_FOR_$(udivmod$a4$)",
  93   "smod_optab->handlers[$A].insn_code = CODE_FOR_$(mod$a3$)",
  94   "umod_optab->handlers[$A].insn_code = CODE_FOR_$(umod$a3$)",
  95   "fmod_optab->handlers[$A].insn_code = CODE_FOR_$(fmod$a3$)",
  96   "remainder_optab->handlers[$A].insn_code = CODE_FOR_$(remainder$a3$)",
  97   "ftrunc_optab->handlers[$A].insn_code = CODE_FOR_$(ftrunc$F$a2$)",
  98   "and_optab->handlers[$A].insn_code = CODE_FOR_$(and$a3$)",
  99   "ior_optab->handlers[$A].insn_code = CODE_FOR_$(ior$a3$)",
 100   "xor_optab->handlers[$A].insn_code = CODE_FOR_$(xor$a3$)",
 101   "ashl_optab->handlers[$A].insn_code = CODE_FOR_$(ashl$a3$)",
 102   "ashr_optab->handlers[$A].insn_code = CODE_FOR_$(ashr$a3$)",
 103   "lshr_optab->handlers[$A].insn_code = CODE_FOR_$(lshr$a3$)",
 104   "rotl_optab->handlers[$A].insn_code = CODE_FOR_$(rotl$a3$)",
 105   "rotr_optab->handlers[$A].insn_code = CODE_FOR_$(rotr$a3$)",
 106   "smin_optab->handlers[$A].insn_code = CODE_FOR_$(smin$a3$)",
 107   "smax_optab->handlers[$A].insn_code = CODE_FOR_$(smax$a3$)",
 108   "umin_optab->handlers[$A].insn_code = CODE_FOR_$(umin$I$a3$)",
 109   "umax_optab->handlers[$A].insn_code = CODE_FOR_$(umax$I$a3$)",
 110   "pow_optab->handlers[$A].insn_code = CODE_FOR_$(pow$a3$)",
 111   "atan2_optab->handlers[$A].insn_code = CODE_FOR_$(atan2$a3$)",
 112   "neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$P$a2$)",
 113   "negv_optab->handlers[$A].insn_code =\n\
 114     neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$F$a2$)",
 115   "negv_optab->handlers[$A].insn_code = CODE_FOR_$(negv$I$a2$)",
 116   "abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$P$a2$)",
 117   "absv_optab->handlers[$A].insn_code =\n\
 118     abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$F$a2$)",
 119   "absv_optab->handlers[$A].insn_code = CODE_FOR_$(absv$I$a2$)",
 120   "copysign_optab->handlers[$A].insn_code = CODE_FOR_$(copysign$F$a3$)",
 121   "sqrt_optab->handlers[$A].insn_code = CODE_FOR_$(sqrt$a2$)",
 122   "floor_optab->handlers[$A].insn_code = CODE_FOR_$(floor$a2$)",
 123   "lfloor_optab->handlers[$B][$A].insn_code = CODE_FOR_$(lfloor$F$a$I$b2$)",
 124   "ceil_optab->handlers[$A].insn_code = CODE_FOR_$(ceil$a2$)",
 125   "lceil_optab->handlers[$B][$A].insn_code = CODE_FOR_$(lceil$F$a$I$b2$)",
 126   "round_optab->handlers[$A].insn_code = CODE_FOR_$(round$a2$)",
 127   "btrunc_optab->handlers[$A].insn_code = CODE_FOR_$(btrunc$a2$)",
 128   "nearbyint_optab->handlers[$A].insn_code = CODE_FOR_$(nearbyint$a2$)",
 129   "rint_optab->handlers[$A].insn_code = CODE_FOR_$(rint$a2$)",
 130   "lrint_optab->handlers[$B][$A].insn_code = CODE_FOR_$(lrint$F$a$I$b2$)",
 131   "lround_optab->handlers[$B][$A].insn_code = CODE_FOR_$(lround$F$a$I$b2$)",
 132   "sincos_optab->handlers[$A].insn_code = CODE_FOR_$(sincos$a3$)",
 133   "sin_optab->handlers[$A].insn_code = CODE_FOR_$(sin$a2$)",
 134   "asin_optab->handlers[$A].insn_code = CODE_FOR_$(asin$a2$)",
 135   "cos_optab->handlers[$A].insn_code = CODE_FOR_$(cos$a2$)",
 136   "acos_optab->handlers[$A].insn_code = CODE_FOR_$(acos$a2$)",
 137   "exp_optab->handlers[$A].insn_code = CODE_FOR_$(exp$a2$)",
 138   "exp10_optab->handlers[$A].insn_code = CODE_FOR_$(exp10$a2$)",
 139   "exp2_optab->handlers[$A].insn_code = CODE_FOR_$(exp2$a2$)",
 140   "expm1_optab->handlers[$A].insn_code = CODE_FOR_$(expm1$a2$)",
 141   "ldexp_optab->handlers[$A].insn_code = CODE_FOR_$(ldexp$a3$)",
 142   "logb_optab->handlers[$A].insn_code = CODE_FOR_$(logb$a2$)",
 143   "ilogb_optab->handlers[$A].insn_code = CODE_FOR_$(ilogb$a2$)",
 144   "log_optab->handlers[$A].insn_code = CODE_FOR_$(log$a2$)",
 145   "log10_optab->handlers[$A].insn_code = CODE_FOR_$(log10$a2$)",
 146   "log2_optab->handlers[$A].insn_code = CODE_FOR_$(log2$a2$)",
 147   "log1p_optab->handlers[$A].insn_code = CODE_FOR_$(log1p$a2$)",
 148   "tan_optab->handlers[$A].insn_code = CODE_FOR_$(tan$a2$)",
 149   "atan_optab->handlers[$A].insn_code = CODE_FOR_$(atan$a2$)",
 150   "strlen_optab->handlers[$A].insn_code = CODE_FOR_$(strlen$a$)",
 151   "one_cmpl_optab->handlers[$A].insn_code = CODE_FOR_$(one_cmpl$a2$)",
 152   "bswap_optab->handlers[$A].insn_code = CODE_FOR_$(bswap$a2$)",
 153   "ffs_optab->handlers[$A].insn_code = CODE_FOR_$(ffs$a2$)",
 154   "clz_optab->handlers[$A].insn_code = CODE_FOR_$(clz$a2$)",
 155   "ctz_optab->handlers[$A].insn_code = CODE_FOR_$(ctz$a2$)",
 156   "popcount_optab->handlers[$A].insn_code = CODE_FOR_$(popcount$a2$)",
 157   "parity_optab->handlers[$A].insn_code = CODE_FOR_$(parity$a2$)",
 158   "mov_optab->handlers[$A].insn_code = CODE_FOR_$(mov$a$)",
 159   "movstrict_optab->handlers[$A].insn_code = CODE_FOR_$(movstrict$a$)",
 160   "movmisalign_optab->handlers[$A].insn_code = CODE_FOR_$(movmisalign$a$)",
 161   "cmp_optab->handlers[$A].insn_code = CODE_FOR_$(cmp$a$)",
 162   "tst_optab->handlers[$A].insn_code = CODE_FOR_$(tst$a$)",
 163   "addcc_optab->handlers[$A].insn_code = CODE_FOR_$(add$acc$)",
 164   "bcc_gen_fctn[$C] = gen_$(b$c$)",
 165   "setcc_gen_code[$C] = CODE_FOR_$(s$c$)",
 166   "movcc_gen_code[$A] = CODE_FOR_$(mov$acc$)",
 167   "cbranch_optab->handlers[$A].insn_code = CODE_FOR_$(cbranch$a4$)",
 168   "cmov_optab->handlers[$A].insn_code = CODE_FOR_$(cmov$a6$)",
 169   "cstore_optab->handlers[$A].insn_code = CODE_FOR_$(cstore$a4$)",
 170   "push_optab->handlers[$A].insn_code = CODE_FOR_$(push$a1$)",
 171   "reload_in_optab[$A] = CODE_FOR_$(reload_in$a$)",
 172   "reload_out_optab[$A] = CODE_FOR_$(reload_out$a$)",
 173   "movmem_optab[$A] = CODE_FOR_$(movmem$a$)",
 174   "cmpstr_optab[$A] = CODE_FOR_$(cmpstr$a$)",
 175   "cmpstrn_optab[$A] = CODE_FOR_$(cmpstrn$a$)",
 176   "cmpmem_optab[$A] = CODE_FOR_$(cmpmem$a$)",
 177   "setmem_optab[$A] = CODE_FOR_$(setmem$a$)",
 178   "sync_add_optab[$A] = CODE_FOR_$(sync_add$I$a$)",
 179   "sync_sub_optab[$A] = CODE_FOR_$(sync_sub$I$a$)",
 180   "sync_ior_optab[$A] = CODE_FOR_$(sync_ior$I$a$)",
 181   "sync_and_optab[$A] = CODE_FOR_$(sync_and$I$a$)",
 182   "sync_xor_optab[$A] = CODE_FOR_$(sync_xor$I$a$)",
 183   "sync_nand_optab[$A] = CODE_FOR_$(sync_nand$I$a$)",
 184   "sync_old_add_optab[$A] = CODE_FOR_$(sync_old_add$I$a$)",
 185   "sync_old_sub_optab[$A] = CODE_FOR_$(sync_old_sub$I$a$)",
 186   "sync_old_ior_optab[$A] = CODE_FOR_$(sync_old_ior$I$a$)",
 187   "sync_old_and_optab[$A] = CODE_FOR_$(sync_old_and$I$a$)",
 188   "sync_old_xor_optab[$A] = CODE_FOR_$(sync_old_xor$I$a$)",
 189   "sync_old_nand_optab[$A] = CODE_FOR_$(sync_old_nand$I$a$)",
 190   "sync_new_add_optab[$A] = CODE_FOR_$(sync_new_add$I$a$)",
 191   "sync_new_sub_optab[$A] = CODE_FOR_$(sync_new_sub$I$a$)",
 192   "sync_new_ior_optab[$A] = CODE_FOR_$(sync_new_ior$I$a$)",
 193   "sync_new_and_optab[$A] = CODE_FOR_$(sync_new_and$I$a$)",
 194   "sync_new_xor_optab[$A] = CODE_FOR_$(sync_new_xor$I$a$)",
 195   "sync_new_nand_optab[$A] = CODE_FOR_$(sync_new_nand$I$a$)",
 196   "sync_compare_and_swap[$A] = CODE_FOR_$(sync_compare_and_swap$I$a$)",
 197   "sync_compare_and_swap_cc[$A] = CODE_FOR_$(sync_compare_and_swap_cc$I$a$)",
 198   "sync_lock_test_and_set[$A] = CODE_FOR_$(sync_lock_test_and_set$I$a$)",
 199   "sync_lock_release[$A] = CODE_FOR_$(sync_lock_release$I$a$)",
 200   "vec_set_optab->handlers[$A].insn_code = CODE_FOR_$(vec_set$a$)",
 201   "vec_extract_optab->handlers[$A].insn_code = CODE_FOR_$(vec_extract$a$)",
 202   "vec_init_optab->handlers[$A].insn_code = CODE_FOR_$(vec_init$a$)",
 203   "vec_shl_optab->handlers[$A].insn_code = CODE_FOR_$(vec_shl_$a$)",
 204   "vec_shr_optab->handlers[$A].insn_code = CODE_FOR_$(vec_shr_$a$)",
 205   "vec_realign_load_optab->handlers[$A].insn_code = CODE_FOR_$(vec_realign_load_$a$)",
 206   "vcond_gen_code[$A] = CODE_FOR_$(vcond$a$)",
 207   "vcondu_gen_code[$A] = CODE_FOR_$(vcondu$a$)",
 208   "ssum_widen_optab->handlers[$A].insn_code = CODE_FOR_$(widen_ssum$I$a3$)",
 209   "usum_widen_optab->handlers[$A].insn_code = CODE_FOR_$(widen_usum$I$a3$)",
 210   "udot_prod_optab->handlers[$A].insn_code = CODE_FOR_$(udot_prod$I$a$)",
 211   "sdot_prod_optab->handlers[$A].insn_code = CODE_FOR_$(sdot_prod$I$a$)",
 212   "reduc_smax_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_smax_$a$)",
 213   "reduc_umax_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_umax_$a$)",
 214   "reduc_smin_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_smin_$a$)",
 215   "reduc_umin_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_umin_$a$)",
 216   "reduc_splus_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_splus_$a$)" ,
 217   "reduc_uplus_optab->handlers[$A].insn_code = CODE_FOR_$(reduc_uplus_$a$)",
 218   "vec_widen_umult_hi_optab->handlers[$A].insn_code = CODE_FOR_$(vec_widen_umult_hi_$a$)",
 219   "vec_widen_umult_lo_optab->handlers[$A].insn_code = CODE_FOR_$(vec_widen_umult_lo_$a$)",
 220   "vec_widen_smult_hi_optab->handlers[$A].insn_code = CODE_FOR_$(vec_widen_smult_hi_$a$)",
 221   "vec_widen_smult_lo_optab->handlers[$A].insn_code = CODE_FOR_$(vec_widen_smult_lo_$a$)",
 222   "vec_unpacks_hi_optab->handlers[$A].insn_code = CODE_FOR_$(vec_unpacks_hi_$a$)",
 223   "vec_unpacks_lo_optab->handlers[$A].insn_code = CODE_FOR_$(vec_unpacks_lo_$a$)",
 224   "vec_unpacku_hi_optab->handlers[$A].insn_code = CODE_FOR_$(vec_unpacku_hi_$a$)",
 225   "vec_unpacku_lo_optab->handlers[$A].insn_code = CODE_FOR_$(vec_unpacku_lo_$a$)",
 226   "vec_pack_mod_optab->handlers[$A].insn_code = CODE_FOR_$(vec_pack_mod_$a$)",
 227   "vec_pack_ssat_optab->handlers[$A].insn_code = CODE_FOR_$(vec_pack_ssat_$a$)",  "vec_pack_usat_optab->handlers[$A].insn_code = CODE_FOR_$(vec_pack_usat_$a$)"
 228 };
 229
 230 static void gen_insn (rtx);
 231
 232 static void
 233 gen_insn (rtx insn)
 234 {
 235   const char *name = XSTR (insn, 0);
 236   int m1 = 0, m2 = 0, op = 0;
 237   size_t pindex;
 238   int i;
 239   const char *np, *pp, *p, *q;
 240
 241   /* Don't mention instructions whose names are the null string.
 242      They are in the machine description just to be recognized.  */
 243   if (*name == 0)
 244     return;
 245
 246   /* See if NAME matches one of the patterns we have for the optabs we know
 247      about.  */
 248
 249   for (pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++)
 250     {
 251       int force_float = 0, force_int = 0, force_partial_int = 0;
 252       int force_consec = 0;
 253       int matches = 1;
 254
 255       for (pp = optabs[pindex]; pp[0] != '$' || pp[1] != '('; pp++)
 256         ;
 257
 258       for (pp += 2, np = name; matches && ! (pp[0] == '$' && pp[1] == ')');
 259            pp++)
 260         {
 261           if (*pp != '$')
 262             {
 263               if (*pp != *np++)
 264                 break;
 265             }
 266           else
 267             switch (*++pp)
 268               {
 269               case 'N':
 270                 force_consec = 1;
 271                 break;
 272               case 'I':
 273                 force_int = 1;
 274                 break;
 275               case 'P':
 276                 force_partial_int = 1;
 277                 break;
 278               case 'F':
 279                 force_float = 1;
 280                 break;
 281               case 'V':
 282                 break;
 283               case 'c':
 284                 for (op = 0; op < NUM_RTX_CODE; op++)
 285                   {
 286                     for (p = GET_RTX_NAME(op), q = np; *p; p++, q++)
 287                       if (*p != *q)
 288                         break;
 289
 290                     /* We have to be concerned about matching "gt" and
 291                        missing "gtu", e.g., so verify we have reached the
 292                        end of thing we are to match.  */
 293                     if (*p == 0 && *q == 0
 294                         && (GET_RTX_CLASS (op) == RTX_COMPARE
 295                             || GET_RTX_CLASS (op) == RTX_COMM_COMPARE))
 296                       break;
 297                   }
 298
 299                 if (op == NUM_RTX_CODE)
 300                   matches = 0;
 301                 else
 302                   np += strlen (GET_RTX_NAME(op));
 303                 break;
 304               case 'a':
 305               case 'b':
 306                 /* This loop will stop at the first prefix match, so
 307                    look through the modes in reverse order, in case
 308                    there are extra CC modes and CC is a prefix of the
 309                    CC modes (as it should be).  */
 310                 for (i = (MAX_MACHINE_MODE) - 1; i >= 0; i--)
 311                   {
 312                     for (p = GET_MODE_NAME(i), q = np; *p; p++, q++)
 313                       if (TOLOWER (*p) != *q)
 314                         break;
 315
 316                     if (*p == 0
 317                         && (! force_int || mode_class[i] == MODE_INT
 318                             || mode_class[i] == MODE_VECTOR_INT)
 319                         && (! force_partial_int
 320                             || mode_class[i] == MODE_INT
 321                             || mode_class[i] == MODE_PARTIAL_INT
 322                             || mode_class[i] == MODE_VECTOR_INT)
 323                         && (! force_float
 324                             || mode_class[i] == MODE_FLOAT
 325                             || mode_class[i] == MODE_DECIMAL_FLOAT
 326                             || mode_class[i] == MODE_COMPLEX_FLOAT
 327                             || mode_class[i] == MODE_VECTOR_FLOAT))
 328                       break;
 329                   }
 330
 331                 if (i < 0)
 332                   matches = 0;
 333                 else if (*pp == 'a')
 334                   m1 = i, np += strlen (GET_MODE_NAME(i));
 335                 else
 336                   m2 = i, np += strlen (GET_MODE_NAME(i));
 337
 338                 force_int = force_partial_int = force_float = 0;
 339                 break;
 340
 341               default:
 342                 gcc_unreachable ();
 343               }
 344         }
 345
 346       if (matches && pp[0] == '$' && pp[1] == ')'
 347           && *np == 0
 348           && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
 349         break;
 350     }
 351
 352   if (pindex == ARRAY_SIZE (optabs))
 353     return;
 354
 355   /* We found a match.  If this pattern is only conditionally present,
 356      write out the "if" and two extra blanks.  */
 357
 358   if (*XSTR (insn, 2) != 0)
 359     printf ("  if (HAVE_%s)\n  ", name);
 360
 361   printf ("  ");
 362
 363   /* Now write out the initialization, making all required substitutions.  */
 364   for (pp = optabs[pindex]; *pp; pp++)
 365     {
 366       if (*pp != '$')
 367         putchar (*pp);
 368       else
 369         switch (*++pp)
 370           {
 371           case '(':  case ')':
 372           case 'I':  case 'F':  case 'N':
 373             break;
 374           case 'V':
 375             if (SCALAR_FLOAT_MODE_P (m1))
 376               printf ("v");
 377             break;
 378           case 'a':
 379             for (np = GET_MODE_NAME(m1); *np; np++)
 380               putchar (TOLOWER (*np));
 381             break;
 382           case 'b':
 383             for (np = GET_MODE_NAME(m2); *np; np++)
 384               putchar (TOLOWER (*np));
 385             break;
 386           case 'A':
 387             printf ("%smode", GET_MODE_NAME(m1));
 388             break;
 389           case 'B':
 390             printf ("%smode", GET_MODE_NAME(m2));
 391             break;
 392           case 'c':
 393             printf ("%s", GET_RTX_NAME(op));
 394             break;
 395           case 'C':
 396             for (np = GET_RTX_NAME(op); *np; np++)
 397               putchar (TOUPPER (*np));
 398             break;
 399           }
 400     }
 401
 402   printf (";\n");
 403 }
 404
 405 extern int main (int, char **);
 406
 407 int
 408 main (int argc, char **argv)
 409 {
 410   rtx desc;
 411
 412   progname = "genopinit";
 413
 414   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
 415     return (FATAL_EXIT_CODE);
 416
 417   printf ("/* Generated automatically by the program `genopinit'\n\
 418 from the machine description file `md'.  */\n\n");
 419
 420   printf ("#include \"config.h\"\n");
 421   printf ("#include \"system.h\"\n");
 422   printf ("#include \"coretypes.h\"\n");
 423   printf ("#include \"tm.h\"\n");
 424   printf ("#include \"rtl.h\"\n");
 425   printf ("#include \"flags.h\"\n");
 426   printf ("#include \"insn-config.h\"\n");
 427   printf ("#include \"recog.h\"\n");
 428   printf ("#include \"expr.h\"\n");
 429   printf ("#include \"optabs.h\"\n");
 430   printf ("#include \"reload.h\"\n\n");
 431
 432   printf ("void\ninit_all_optabs (void)\n{\n");
 433
 434   puts ("\
 435 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 436   int i, j;\n\
 437 #endif\n");
 438
 439   /* Read the machine description.  */
 440
 441   while (1)
 442     {
 443       int line_no, insn_code_number = 0;
 444
 445       desc = read_md_rtx (&line_no, &insn_code_number);
 446       if (desc == NULL)
 447         break;
 448
 449       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 450         gen_insn (desc);
 451     }
 452
 453   puts ("\
 454 \n\
 455 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 456   /* This flag says the same insns that convert to a signed fixnum\n\
 457      also convert validly to an unsigned one.  */\n\
 458   for (i = 0; i < NUM_MACHINE_MODES; i++)\n\
 459     for (j = 0; j < NUM_MACHINE_MODES; j++)\n\
 460       ufixtrunc_optab->handlers[i][j].insn_code\n\
 461       = sfixtrunc_optab->handlers[i][j].insn_code;\n\
 462 #endif\n\
 463 }");
 464
 465   fflush (stdout);
 466   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 467 }