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, 2007 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21
  22 #include "bconfig.h"
  23 #include "system.h"
  24 #include "coretypes.h"
  25 #include "tm.h"
  26 #include "rtl.h"
  27 #include "errors.h"
  28 #include "gensupport.h"
  29
  30
  31 /* Many parts of GCC use arrays that are indexed by machine mode and
  32    contain the insn codes for pattern in the MD file that perform a given
  33    operation on operands of that mode.
  34
  35    These patterns are present in the MD file with names that contain
  36    the mode(s) used and the name of the operation.  This program
  37    writes a function `init_all_optabs' that initializes the optabs with
  38    all the insn codes of the relevant patterns present in the MD file.
  39
  40    This array contains a list of optabs that need to be initialized.  Within
  41    each string, the name of the pattern to be matched against is delimited
  42    with $( and $).  In the string, $a and $b are used to match a short mode
  43    name (the part of the mode name not including `mode' and converted to
  44    lower-case).  When writing out the initializer, the entire string is
  45    used.  $A and $B are replaced with the full name of the mode; $a and $b
  46    are replaced with the short form of the name, as above.
  47
  48    If $N is present in the pattern, it means the two modes must be consecutive
  49    widths in the same mode class (e.g, QImode and HImode).  $I means that
  50    only full integer modes should be considered for the next mode, and $F
  51    means that only float modes should be considered.
  52    $P means that both full and partial integer modes should be considered.
  53
  54    $V means to emit 'v' if the first mode is a MODE_FLOAT mode.
  55
  56    For some optabs, we store the operation by RTL codes.  These are only
  57    used for comparisons.  In that case, $c and $C are the lower-case and
  58    upper-case forms of the comparison, respectively.  */
  59
  60 static const char * const optabs[] =
  61 { "convert_optab_handler (sext_optab, $B, $A)->insn_code = CODE_FOR_$(extend$a$b2$)",
  62   "convert_optab_handler (zext_optab, $B, $A)->insn_code = CODE_FOR_$(zero_extend$a$b2$)",
  63   "convert_optab_handler (sfix_optab, $B, $A)->insn_code = CODE_FOR_$(fix$F$a$I$b2$)",
  64   "convert_optab_handler (ufix_optab, $B, $A)->insn_code = CODE_FOR_$(fixuns$F$a$b2$)",
  65   "convert_optab_handler (sfixtrunc_optab, $B, $A)->insn_code = CODE_FOR_$(fix_trunc$F$a$I$b2$)",
  66   "convert_optab_handler (ufixtrunc_optab, $B, $A)->insn_code = CODE_FOR_$(fixuns_trunc$F$a$I$b2$)",
  67   "convert_optab_handler (sfloat_optab, $B, $A)->insn_code = CODE_FOR_$(float$I$a$F$b2$)",
  68   "convert_optab_handler (ufloat_optab, $B, $A)->insn_code = CODE_FOR_$(floatuns$I$a$F$b2$)",
  69   "convert_optab_handler (trunc_optab, $B, $A)->insn_code = CODE_FOR_$(trunc$a$b2$)",
  70   "optab_handler (add_optab, $A)->insn_code = CODE_FOR_$(add$P$a3$)",
  71   "optab_handler (addv_optab, $A)->insn_code =\n\
  72     optab_handler (add_optab, $A)->insn_code = CODE_FOR_$(add$F$a3$)",
  73   "optab_handler (addv_optab, $A)->insn_code = CODE_FOR_$(addv$I$a3$)",
  74   "optab_handler (sub_optab, $A)->insn_code = CODE_FOR_$(sub$P$a3$)",
  75   "optab_handler (subv_optab, $A)->insn_code =\n\
  76     optab_handler (sub_optab, $A)->insn_code = CODE_FOR_$(sub$F$a3$)",
  77   "optab_handler (subv_optab, $A)->insn_code = CODE_FOR_$(subv$I$a3$)",
  78   "optab_handler (smul_optab, $A)->insn_code = CODE_FOR_$(mul$P$a3$)",
  79   "optab_handler (smulv_optab, $A)->insn_code =\n\
  80     optab_handler (smul_optab, $A)->insn_code = CODE_FOR_$(mul$F$a3$)",
  81   "optab_handler (smulv_optab, $A)->insn_code = CODE_FOR_$(mulv$I$a3$)",
  82   "optab_handler (umul_highpart_optab, $A)->insn_code = CODE_FOR_$(umul$a3_highpart$)",
  83   "optab_handler (smul_highpart_optab, $A)->insn_code = CODE_FOR_$(smul$a3_highpart$)",
  84   "optab_handler (smul_widen_optab, $B)->insn_code = CODE_FOR_$(mul$a$b3$)$N",
  85   "optab_handler (umul_widen_optab, $B)->insn_code = CODE_FOR_$(umul$a$b3$)$N",
  86   "optab_handler (usmul_widen_optab, $B)->insn_code = CODE_FOR_$(usmul$a$b3$)$N",
  87   "optab_handler (smadd_widen_optab, $B)->insn_code = CODE_FOR_$(madd$a$b4$)$N",
  88   "optab_handler (umadd_widen_optab, $B)->insn_code = CODE_FOR_$(umadd$a$b4$)$N",
  89   "optab_handler (smsub_widen_optab, $B)->insn_code = CODE_FOR_$(msub$a$b4$)$N",
  90   "optab_handler (umsub_widen_optab, $B)->insn_code = CODE_FOR_$(umsub$a$b4$)$N",
  91   "optab_handler (sdiv_optab, $A)->insn_code = CODE_FOR_$(div$a3$)",
  92   "optab_handler (sdivv_optab, $A)->insn_code = CODE_FOR_$(div$V$I$a3$)",
  93   "optab_handler (udiv_optab, $A)->insn_code = CODE_FOR_$(udiv$I$a3$)",
  94   "optab_handler (sdivmod_optab, $A)->insn_code = CODE_FOR_$(divmod$a4$)",
  95   "optab_handler (udivmod_optab, $A)->insn_code = CODE_FOR_$(udivmod$a4$)",
  96   "optab_handler (smod_optab, $A)->insn_code = CODE_FOR_$(mod$a3$)",
  97   "optab_handler (umod_optab, $A)->insn_code = CODE_FOR_$(umod$a3$)",
  98   "optab_handler (fmod_optab, $A)->insn_code = CODE_FOR_$(fmod$a3$)",
  99   "optab_handler (remainder_optab, $A)->insn_code = CODE_FOR_$(remainder$a3$)",
 100   "optab_handler (ftrunc_optab, $A)->insn_code = CODE_FOR_$(ftrunc$F$a2$)",
 101   "optab_handler (and_optab, $A)->insn_code = CODE_FOR_$(and$a3$)",
 102   "optab_handler (ior_optab, $A)->insn_code = CODE_FOR_$(ior$a3$)",
 103   "optab_handler (xor_optab, $A)->insn_code = CODE_FOR_$(xor$a3$)",
 104   "optab_handler (ashl_optab, $A)->insn_code = CODE_FOR_$(ashl$a3$)",
 105   "optab_handler (ashr_optab, $A)->insn_code = CODE_FOR_$(ashr$a3$)",
 106   "optab_handler (lshr_optab, $A)->insn_code = CODE_FOR_$(lshr$a3$)",
 107   "optab_handler (rotl_optab, $A)->insn_code = CODE_FOR_$(rotl$a3$)",
 108   "optab_handler (rotr_optab, $A)->insn_code = CODE_FOR_$(rotr$a3$)",
 109   "optab_handler (smin_optab, $A)->insn_code = CODE_FOR_$(smin$a3$)",
 110   "optab_handler (smax_optab, $A)->insn_code = CODE_FOR_$(smax$a3$)",
 111   "optab_handler (umin_optab, $A)->insn_code = CODE_FOR_$(umin$I$a3$)",
 112   "optab_handler (umax_optab, $A)->insn_code = CODE_FOR_$(umax$I$a3$)",
 113   "optab_handler (pow_optab, $A)->insn_code = CODE_FOR_$(pow$a3$)",
 114   "optab_handler (atan2_optab, $A)->insn_code = CODE_FOR_$(atan2$a3$)",
 115   "optab_handler (neg_optab, $A)->insn_code = CODE_FOR_$(neg$P$a2$)",
 116   "optab_handler (negv_optab, $A)->insn_code =\n\
 117     optab_handler (neg_optab, $A)->insn_code = CODE_FOR_$(neg$F$a2$)",
 118   "optab_handler (negv_optab, $A)->insn_code = CODE_FOR_$(negv$I$a2$)",
 119   "optab_handler (abs_optab, $A)->insn_code = CODE_FOR_$(abs$P$a2$)",
 120   "optab_handler (absv_optab, $A)->insn_code =\n\
 121     optab_handler (abs_optab, $A)->insn_code = CODE_FOR_$(abs$F$a2$)",
 122   "optab_handler (absv_optab, $A)->insn_code = CODE_FOR_$(absv$I$a2$)",
 123   "optab_handler (copysign_optab, $A)->insn_code = CODE_FOR_$(copysign$F$a3$)",
 124   "optab_handler (signbit_optab, $A)->insn_code = CODE_FOR_$(signbit$F$a2$)",
 125   "optab_handler (isinf_optab, $A)->insn_code = CODE_FOR_$(isinf$a2$)",
 126   "optab_handler (sqrt_optab, $A)->insn_code = CODE_FOR_$(sqrt$a2$)",
 127   "optab_handler (floor_optab, $A)->insn_code = CODE_FOR_$(floor$a2$)",
 128   "convert_optab_handler (lfloor_optab, $B, $A)->insn_code = CODE_FOR_$(lfloor$F$a$I$b2$)",
 129   "optab_handler (ceil_optab, $A)->insn_code = CODE_FOR_$(ceil$a2$)",
 130   "convert_optab_handler (lceil_optab, $B, $A)->insn_code = CODE_FOR_$(lceil$F$a$I$b2$)",
 131   "optab_handler (round_optab, $A)->insn_code = CODE_FOR_$(round$a2$)",
 132   "optab_handler (btrunc_optab, $A)->insn_code = CODE_FOR_$(btrunc$a2$)",
 133   "optab_handler (nearbyint_optab, $A)->insn_code = CODE_FOR_$(nearbyint$a2$)",
 134   "optab_handler (rint_optab, $A)->insn_code = CODE_FOR_$(rint$a2$)",
 135   "convert_optab_handler (lrint_optab, $B, $A)->insn_code = CODE_FOR_$(lrint$F$a$I$b2$)",
 136   "convert_optab_handler (lround_optab, $B, $A)->insn_code = CODE_FOR_$(lround$F$a$I$b2$)",
 137   "optab_handler (sincos_optab, $A)->insn_code = CODE_FOR_$(sincos$a3$)",
 138   "optab_handler (sin_optab, $A)->insn_code = CODE_FOR_$(sin$a2$)",
 139   "optab_handler (asin_optab, $A)->insn_code = CODE_FOR_$(asin$a2$)",
 140   "optab_handler (cos_optab, $A)->insn_code = CODE_FOR_$(cos$a2$)",
 141   "optab_handler (acos_optab, $A)->insn_code = CODE_FOR_$(acos$a2$)",
 142   "optab_handler (exp_optab, $A)->insn_code = CODE_FOR_$(exp$a2$)",
 143   "optab_handler (exp10_optab, $A)->insn_code = CODE_FOR_$(exp10$a2$)",
 144   "optab_handler (exp2_optab, $A)->insn_code = CODE_FOR_$(exp2$a2$)",
 145   "optab_handler (expm1_optab, $A)->insn_code = CODE_FOR_$(expm1$a2$)",
 146   "optab_handler (ldexp_optab, $A)->insn_code = CODE_FOR_$(ldexp$a3$)",
 147   "optab_handler (scalb_optab, $A)->insn_code = CODE_FOR_$(scalb$a3$)",
 148   "optab_handler (logb_optab, $A)->insn_code = CODE_FOR_$(logb$a2$)",
 149   "optab_handler (ilogb_optab, $A)->insn_code = CODE_FOR_$(ilogb$a2$)",
 150   "optab_handler (log_optab, $A)->insn_code = CODE_FOR_$(log$a2$)",
 151   "optab_handler (log10_optab, $A)->insn_code = CODE_FOR_$(log10$a2$)",
 152   "optab_handler (log2_optab, $A)->insn_code = CODE_FOR_$(log2$a2$)",
 153   "optab_handler (log1p_optab, $A)->insn_code = CODE_FOR_$(log1p$a2$)",
 154   "optab_handler (tan_optab, $A)->insn_code = CODE_FOR_$(tan$a2$)",
 155   "optab_handler (atan_optab, $A)->insn_code = CODE_FOR_$(atan$a2$)",
 156   "optab_handler (strlen_optab, $A)->insn_code = CODE_FOR_$(strlen$a$)",
 157   "optab_handler (one_cmpl_optab, $A)->insn_code = CODE_FOR_$(one_cmpl$a2$)",
 158   "optab_handler (bswap_optab, $A)->insn_code = CODE_FOR_$(bswap$a2$)",
 159   "optab_handler (ffs_optab, $A)->insn_code = CODE_FOR_$(ffs$a2$)",
 160   "optab_handler (clz_optab, $A)->insn_code = CODE_FOR_$(clz$a2$)",
 161   "optab_handler (ctz_optab, $A)->insn_code = CODE_FOR_$(ctz$a2$)",
 162   "optab_handler (popcount_optab, $A)->insn_code = CODE_FOR_$(popcount$a2$)",
 163   "optab_handler (parity_optab, $A)->insn_code = CODE_FOR_$(parity$a2$)",
 164   "optab_handler (mov_optab, $A)->insn_code = CODE_FOR_$(mov$a$)",
 165   "optab_handler (movstrict_optab, $A)->insn_code = CODE_FOR_$(movstrict$a$)",
 166   "optab_handler (movmisalign_optab, $A)->insn_code = CODE_FOR_$(movmisalign$a$)",
 167   "optab_handler (storent_optab, $A)->insn_code = CODE_FOR_$(storent$a$)",
 168   "optab_handler (cmp_optab, $A)->insn_code = CODE_FOR_$(cmp$a$)",
 169   "optab_handler (tst_optab, $A)->insn_code = CODE_FOR_$(tst$a$)",
 170   "optab_handler (addcc_optab, $A)->insn_code = CODE_FOR_$(add$acc$)",
 171   "bcc_gen_fctn[$C] = gen_$(b$c$)",
 172   "setcc_gen_code[$C] = CODE_FOR_$(s$c$)",
 173   "movcc_gen_code[$A] = CODE_FOR_$(mov$acc$)",
 174   "optab_handler (cbranch_optab, $A)->insn_code = CODE_FOR_$(cbranch$a4$)",
 175   "optab_handler (cmov_optab, $A)->insn_code = CODE_FOR_$(cmov$a6$)",
 176   "optab_handler (cstore_optab, $A)->insn_code = CODE_FOR_$(cstore$a4$)",
 177   "optab_handler (push_optab, $A)->insn_code = CODE_FOR_$(push$a1$)",
 178   "reload_in_optab[$A] = CODE_FOR_$(reload_in$a$)",
 179   "reload_out_optab[$A] = CODE_FOR_$(reload_out$a$)",
 180   "movmem_optab[$A] = CODE_FOR_$(movmem$a$)",
 181   "cmpstr_optab[$A] = CODE_FOR_$(cmpstr$a$)",
 182   "cmpstrn_optab[$A] = CODE_FOR_$(cmpstrn$a$)",
 183   "cmpmem_optab[$A] = CODE_FOR_$(cmpmem$a$)",
 184   "setmem_optab[$A] = CODE_FOR_$(setmem$a$)",
 185   "sync_add_optab[$A] = CODE_FOR_$(sync_add$I$a$)",
 186   "sync_sub_optab[$A] = CODE_FOR_$(sync_sub$I$a$)",
 187   "sync_ior_optab[$A] = CODE_FOR_$(sync_ior$I$a$)",
 188   "sync_and_optab[$A] = CODE_FOR_$(sync_and$I$a$)",
 189   "sync_xor_optab[$A] = CODE_FOR_$(sync_xor$I$a$)",
 190   "sync_nand_optab[$A] = CODE_FOR_$(sync_nand$I$a$)",
 191   "sync_old_add_optab[$A] = CODE_FOR_$(sync_old_add$I$a$)",
 192   "sync_old_sub_optab[$A] = CODE_FOR_$(sync_old_sub$I$a$)",
 193   "sync_old_ior_optab[$A] = CODE_FOR_$(sync_old_ior$I$a$)",
 194   "sync_old_and_optab[$A] = CODE_FOR_$(sync_old_and$I$a$)",
 195   "sync_old_xor_optab[$A] = CODE_FOR_$(sync_old_xor$I$a$)",
 196   "sync_old_nand_optab[$A] = CODE_FOR_$(sync_old_nand$I$a$)",
 197   "sync_new_add_optab[$A] = CODE_FOR_$(sync_new_add$I$a$)",
 198   "sync_new_sub_optab[$A] = CODE_FOR_$(sync_new_sub$I$a$)",
 199   "sync_new_ior_optab[$A] = CODE_FOR_$(sync_new_ior$I$a$)",
 200   "sync_new_and_optab[$A] = CODE_FOR_$(sync_new_and$I$a$)",
 201   "sync_new_xor_optab[$A] = CODE_FOR_$(sync_new_xor$I$a$)",
 202   "sync_new_nand_optab[$A] = CODE_FOR_$(sync_new_nand$I$a$)",
 203   "sync_compare_and_swap[$A] = CODE_FOR_$(sync_compare_and_swap$I$a$)",
 204   "sync_compare_and_swap_cc[$A] = CODE_FOR_$(sync_compare_and_swap_cc$I$a$)",
 205   "sync_lock_test_and_set[$A] = CODE_FOR_$(sync_lock_test_and_set$I$a$)",
 206   "sync_lock_release[$A] = CODE_FOR_$(sync_lock_release$I$a$)",
 207   "optab_handler (vec_set_optab, $A)->insn_code = CODE_FOR_$(vec_set$a$)",
 208   "optab_handler (vec_extract_optab, $A)->insn_code = CODE_FOR_$(vec_extract$a$)",
 209   "optab_handler (vec_extract_even_optab, $A)->insn_code = CODE_FOR_$(vec_extract_even$a$)",
 210   "optab_handler (vec_extract_odd_optab, $A)->insn_code = CODE_FOR_$(vec_extract_odd$a$)",
 211   "optab_handler (vec_interleave_high_optab, $A)->insn_code = CODE_FOR_$(vec_interleave_high$a$)",
 212   "optab_handler (vec_interleave_low_optab, $A)->insn_code = CODE_FOR_$(vec_interleave_low$a$)",
 213   "optab_handler (vec_init_optab, $A)->insn_code = CODE_FOR_$(vec_init$a$)",
 214   "optab_handler (vec_shl_optab, $A)->insn_code = CODE_FOR_$(vec_shl_$a$)",
 215   "optab_handler (vec_shr_optab, $A)->insn_code = CODE_FOR_$(vec_shr_$a$)",
 216   "optab_handler (vec_realign_load_optab, $A)->insn_code = CODE_FOR_$(vec_realign_load_$a$)",
 217   "vcond_gen_code[$A] = CODE_FOR_$(vcond$a$)",
 218   "vcondu_gen_code[$A] = CODE_FOR_$(vcondu$a$)",
 219   "optab_handler (ssum_widen_optab, $A)->insn_code = CODE_FOR_$(widen_ssum$I$a3$)",
 220   "optab_handler (usum_widen_optab, $A)->insn_code = CODE_FOR_$(widen_usum$I$a3$)",
 221   "optab_handler (udot_prod_optab, $A)->insn_code = CODE_FOR_$(udot_prod$I$a$)",
 222   "optab_handler (sdot_prod_optab, $A)->insn_code = CODE_FOR_$(sdot_prod$I$a$)",
 223   "optab_handler (reduc_smax_optab, $A)->insn_code = CODE_FOR_$(reduc_smax_$a$)",
 224   "optab_handler (reduc_umax_optab, $A)->insn_code = CODE_FOR_$(reduc_umax_$a$)",
 225   "optab_handler (reduc_smin_optab, $A)->insn_code = CODE_FOR_$(reduc_smin_$a$)",
 226   "optab_handler (reduc_umin_optab, $A)->insn_code = CODE_FOR_$(reduc_umin_$a$)",
 227   "optab_handler (reduc_splus_optab, $A)->insn_code = CODE_FOR_$(reduc_splus_$a$)" ,
 228   "optab_handler (reduc_uplus_optab, $A)->insn_code = CODE_FOR_$(reduc_uplus_$a$)",
 229   "optab_handler (vec_widen_umult_hi_optab, $A)->insn_code = CODE_FOR_$(vec_widen_umult_hi_$a$)",
 230   "optab_handler (vec_widen_umult_lo_optab, $A)->insn_code = CODE_FOR_$(vec_widen_umult_lo_$a$)",
 231   "optab_handler (vec_widen_smult_hi_optab, $A)->insn_code = CODE_FOR_$(vec_widen_smult_hi_$a$)",
 232   "optab_handler (vec_widen_smult_lo_optab, $A)->insn_code = CODE_FOR_$(vec_widen_smult_lo_$a$)",
 233   "optab_handler (vec_unpacks_hi_optab, $A)->insn_code = CODE_FOR_$(vec_unpacks_hi_$a$)",
 234   "optab_handler (vec_unpacks_lo_optab, $A)->insn_code = CODE_FOR_$(vec_unpacks_lo_$a$)",
 235   "optab_handler (vec_unpacku_hi_optab, $A)->insn_code = CODE_FOR_$(vec_unpacku_hi_$a$)",
 236   "optab_handler (vec_unpacku_lo_optab, $A)->insn_code = CODE_FOR_$(vec_unpacku_lo_$a$)",
 237   "optab_handler (vec_unpacks_float_hi_optab, $A)->insn_code = CODE_FOR_$(vec_unpacks_float_hi_$a$)",
 238   "optab_handler (vec_unpacks_float_lo_optab, $A)->insn_code = CODE_FOR_$(vec_unpacks_float_lo_$a$)",
 239   "optab_handler (vec_unpacku_float_hi_optab, $A)->insn_code = CODE_FOR_$(vec_unpacku_float_hi_$a$)",
 240   "optab_handler (vec_unpacku_float_lo_optab, $A)->insn_code = CODE_FOR_$(vec_unpacku_float_lo_$a$)",
 241   "optab_handler (vec_pack_trunc_optab, $A)->insn_code = CODE_FOR_$(vec_pack_trunc_$a$)",
 242   "optab_handler (vec_pack_ssat_optab, $A)->insn_code = CODE_FOR_$(vec_pack_ssat_$a$)",
 243   "optab_handler (vec_pack_usat_optab, $A)->insn_code = CODE_FOR_$(vec_pack_usat_$a$)",
 244   "optab_handler (vec_pack_sfix_trunc_optab, $A)->insn_code = CODE_FOR_$(vec_pack_sfix_trunc_$a$)",
 245   "optab_handler (vec_pack_ufix_trunc_optab, $A)->insn_code = CODE_FOR_$(vec_pack_ufix_trunc_$a$)"
 246 };
 247
 248 static void gen_insn (rtx);
 249
 250 static void
 251 gen_insn (rtx insn)
 252 {
 253   const char *name = XSTR (insn, 0);
 254   int m1 = 0, m2 = 0, op = 0;
 255   size_t pindex;
 256   int i;
 257   const char *np, *pp, *p, *q;
 258
 259   /* Don't mention instructions whose names are the null string.
 260      They are in the machine description just to be recognized.  */
 261   if (*name == 0)
 262     return;
 263
 264   /* See if NAME matches one of the patterns we have for the optabs we know
 265      about.  */
 266
 267   for (pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++)
 268     {
 269       int force_float = 0, force_int = 0, force_partial_int = 0;
 270       int force_consec = 0;
 271       int matches = 1;
 272
 273       for (pp = optabs[pindex]; pp[0] != '$' || pp[1] != '('; pp++)
 274         ;
 275
 276       for (pp += 2, np = name; matches && ! (pp[0] == '$' && pp[1] == ')');
 277            pp++)
 278         {
 279           if (*pp != '$')
 280             {
 281               if (*pp != *np++)
 282                 break;
 283             }
 284           else
 285             switch (*++pp)
 286               {
 287               case 'N':
 288                 force_consec = 1;
 289                 break;
 290               case 'I':
 291                 force_int = 1;
 292                 break;
 293               case 'P':
 294                 force_partial_int = 1;
 295                 break;
 296               case 'F':
 297                 force_float = 1;
 298                 break;
 299               case 'V':
 300                 break;
 301               case 'c':
 302                 for (op = 0; op < NUM_RTX_CODE; op++)
 303                   {
 304                     for (p = GET_RTX_NAME(op), q = np; *p; p++, q++)
 305                       if (*p != *q)
 306                         break;
 307
 308                     /* We have to be concerned about matching "gt" and
 309                        missing "gtu", e.g., so verify we have reached the
 310                        end of thing we are to match.  */
 311                     if (*p == 0 && *q == 0
 312                         && (GET_RTX_CLASS (op) == RTX_COMPARE
 313                             || GET_RTX_CLASS (op) == RTX_COMM_COMPARE))
 314                       break;
 315                   }
 316
 317                 if (op == NUM_RTX_CODE)
 318                   matches = 0;
 319                 else
 320                   np += strlen (GET_RTX_NAME(op));
 321                 break;
 322               case 'a':
 323               case 'b':
 324                 /* This loop will stop at the first prefix match, so
 325                    look through the modes in reverse order, in case
 326                    there are extra CC modes and CC is a prefix of the
 327                    CC modes (as it should be).  */
 328                 for (i = (MAX_MACHINE_MODE) - 1; i >= 0; i--)
 329                   {
 330                     for (p = GET_MODE_NAME(i), q = np; *p; p++, q++)
 331                       if (TOLOWER (*p) != *q)
 332                         break;
 333
 334                     if (*p == 0
 335                         && (! force_int || mode_class[i] == MODE_INT
 336                             || mode_class[i] == MODE_VECTOR_INT)
 337                         && (! force_partial_int
 338                             || mode_class[i] == MODE_INT
 339                             || mode_class[i] == MODE_PARTIAL_INT
 340                             || mode_class[i] == MODE_VECTOR_INT)
 341                         && (! force_float
 342                             || mode_class[i] == MODE_FLOAT
 343                             || mode_class[i] == MODE_DECIMAL_FLOAT
 344                             || mode_class[i] == MODE_COMPLEX_FLOAT
 345                             || mode_class[i] == MODE_VECTOR_FLOAT))
 346                       break;
 347                   }
 348
 349                 if (i < 0)
 350                   matches = 0;
 351                 else if (*pp == 'a')
 352                   m1 = i, np += strlen (GET_MODE_NAME(i));
 353                 else
 354                   m2 = i, np += strlen (GET_MODE_NAME(i));
 355
 356                 force_int = force_partial_int = force_float = 0;
 357                 break;
 358
 359               default:
 360                 gcc_unreachable ();
 361               }
 362         }
 363
 364       if (matches && pp[0] == '$' && pp[1] == ')'
 365           && *np == 0
 366           && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
 367         break;
 368     }
 369
 370   if (pindex == ARRAY_SIZE (optabs))
 371     return;
 372
 373   /* We found a match.  If this pattern is only conditionally present,
 374      write out the "if" and two extra blanks.  */
 375
 376   if (*XSTR (insn, 2) != 0)
 377     printf ("  if (HAVE_%s)\n  ", name);
 378
 379   printf ("  ");
 380
 381   /* Now write out the initialization, making all required substitutions.  */
 382   for (pp = optabs[pindex]; *pp; pp++)
 383     {
 384       if (*pp != '$')
 385         putchar (*pp);
 386       else
 387         switch (*++pp)
 388           {
 389           case '(':  case ')':
 390           case 'I':  case 'F':  case 'N':
 391             break;
 392           case 'V':
 393             if (SCALAR_FLOAT_MODE_P (m1))
 394               printf ("v");
 395             break;
 396           case 'a':
 397             for (np = GET_MODE_NAME(m1); *np; np++)
 398               putchar (TOLOWER (*np));
 399             break;
 400           case 'b':
 401             for (np = GET_MODE_NAME(m2); *np; np++)
 402               putchar (TOLOWER (*np));
 403             break;
 404           case 'A':
 405             printf ("%smode", GET_MODE_NAME(m1));
 406             break;
 407           case 'B':
 408             printf ("%smode", GET_MODE_NAME(m2));
 409             break;
 410           case 'c':
 411             printf ("%s", GET_RTX_NAME(op));
 412             break;
 413           case 'C':
 414             for (np = GET_RTX_NAME(op); *np; np++)
 415               putchar (TOUPPER (*np));
 416             break;
 417           }
 418     }
 419
 420   printf (";\n");
 421 }
 422
 423 extern int main (int, char **);
 424
 425 int
 426 main (int argc, char **argv)
 427 {
 428   rtx desc;
 429
 430   progname = "genopinit";
 431
 432   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
 433     return (FATAL_EXIT_CODE);
 434
 435   printf ("/* Generated automatically by the program `genopinit'\n\
 436 from the machine description file `md'.  */\n\n");
 437
 438   printf ("#include \"config.h\"\n");
 439   printf ("#include \"system.h\"\n");
 440   printf ("#include \"coretypes.h\"\n");
 441   printf ("#include \"tm.h\"\n");
 442   printf ("#include \"rtl.h\"\n");
 443   printf ("#include \"flags.h\"\n");
 444   printf ("#include \"insn-config.h\"\n");
 445   printf ("#include \"recog.h\"\n");
 446   printf ("#include \"expr.h\"\n");
 447   printf ("#include \"optabs.h\"\n");
 448   printf ("#include \"reload.h\"\n\n");
 449
 450   printf ("void\ninit_all_optabs (void)\n{\n");
 451
 452   puts ("\
 453 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 454   int i, j;\n\
 455 #endif\n");
 456
 457   /* Read the machine description.  */
 458
 459   while (1)
 460     {
 461       int line_no, insn_code_number = 0;
 462
 463       desc = read_md_rtx (&line_no, &insn_code_number);
 464       if (desc == NULL)
 465         break;
 466
 467       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 468         gen_insn (desc);
 469     }
 470
 471   puts ("\
 472 \n\
 473 #ifdef FIXUNS_TRUNC_LIKE_FIX_TRUNC\n\
 474   /* This flag says the same insns that convert to a signed fixnum\n\
 475      also convert validly to an unsigned one.  */\n\
 476   for (i = 0; i < NUM_MACHINE_MODES; i++)\n\
 477     for (j = 0; j < NUM_MACHINE_MODES; j++)\n\
 478       convert_optab_handler (ufixtrunc_optab, i, j)->insn_code\n\
 479       = convert_optab_handler (sfixtrunc_optab, i, j)->insn_code;\n\
 480 #endif\n\
 481 }");
 482
 483   fflush (stdout);
 484   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 485 }