gcc/genopinit.c

   1 /* Generate code to initialize optabs from machine description.
   2    Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
   3    1999, 2000 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 "hconfig.h"
  24 #include "system.h"
  25 #include "rtl.h"
  26 #include "errors.h"
  27 #include "gensupport.h"
  28
  29
  30 /* Many parts of GCC use arrays that are indexed by machine mode and
  31    contain the insn codes for pattern in the MD file that perform a given
  32    operation on operands of that mode.
  33
  34    These patterns are present in the MD file with names that contain
  35    the mode(s) used and the name of the operation.  This program
  36    writes a function `init_all_optabs' that initializes the optabs with
  37    all the insn codes of the relevant patterns present in the MD file.
  38
  39    This array contains a list of optabs that need to be initialized.  Within
  40    each string, the name of the pattern to be matched against is delimited
  41    with $( and $).  In the string, $a and $b are used to match a short mode
  42    name (the part of the mode name not including `mode' and converted to
  43    lower-case).  When writing out the initializer, the entire string is
  44    used.  $A and $B are replaced with the full name of the mode; $a and $b
  45    are replaced with the short form of the name, as above.
  46
  47    If $N is present in the pattern, it means the two modes must be consecutive
  48    widths in the same mode class (e.g, QImode and HImode).  $I means that
  49    only full integer modes should be considered for the next mode, and $F
  50    means that only float modes should be considered.
  51    $P means that both full and partial integer modes should be considered.
  52
  53    $V means to emit 'v' if the first mode is a MODE_FLOAT mode.
  54
  55    For some optabs, we store the operation by RTL codes.  These are only
  56    used for comparisons.  In that case, $c and $C are the lower-case and
  57    upper-case forms of the comparison, respectively.  */
  58
  59 static const char * const optabs[] =
  60 { "extendtab[$B][$A][0] = CODE_FOR_$(extend$a$b2$)",
  61   "extendtab[$B][$A][1] = CODE_FOR_$(zero_extend$a$b2$)",
  62   "fixtab[$A][$B][0] = CODE_FOR_$(fix$F$a$I$b2$)",
  63   "fixtab[$A][$B][1] = CODE_FOR_$(fixuns$F$a$b2$)",
  64   "fixtrunctab[$A][$B][0] = CODE_FOR_$(fix_trunc$F$a$I$b2$)",
  65   "fixtrunctab[$A][$B][1] = CODE_FOR_$(fixuns_trunc$F$a$I$b2$)",
  66   "floattab[$B][$A][0] = CODE_FOR_$(float$I$a$F$b2$)",
  67   "floattab[$B][$A][1] = CODE_FOR_$(floatuns$I$a$F$b2$)",
  68   "add_optab->handlers[$A].insn_code = CODE_FOR_$(add$P$a3$)",
  69   "addv_optab->handlers[(int) $A].insn_code =\n\
  70     add_optab->handlers[(int) $A].insn_code = CODE_FOR_$(add$F$a3$)",
  71   "addv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(addv$I$a3$)",
  72   "sub_optab->handlers[$A].insn_code = CODE_FOR_$(sub$P$a3$)",
  73   "subv_optab->handlers[(int) $A].insn_code =\n\
  74     sub_optab->handlers[(int) $A].insn_code = CODE_FOR_$(sub$F$a3$)",
  75   "subv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(subv$I$a3$)",
  76   "smul_optab->handlers[$A].insn_code = CODE_FOR_$(mul$P$a3$)",
  77   "smulv_optab->handlers[(int) $A].insn_code =\n\
  78     smul_optab->handlers[(int) $A].insn_code = CODE_FOR_$(mul$F$a3$)",
  79   "smulv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(mulv$I$a3$)",
  80   "umul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(umul$a3_highpart$)",
  81   "smul_highpart_optab->handlers[$A].insn_code = CODE_FOR_$(smul$a3_highpart$)",
  82   "smul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(mul$a$b3$)$N",
  83   "umul_widen_optab->handlers[$B].insn_code = CODE_FOR_$(umul$a$b3$)$N",
  84   "sdiv_optab->handlers[$A].insn_code = CODE_FOR_$(div$a3$)",
  85   "sdivv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(div$V$I$a3$)",
  86   "udiv_optab->handlers[$A].insn_code = CODE_FOR_$(udiv$I$a3$)",
  87   "sdivmod_optab->handlers[$A].insn_code = CODE_FOR_$(divmod$a4$)",
  88   "udivmod_optab->handlers[$A].insn_code = CODE_FOR_$(udivmod$a4$)",
  89   "smod_optab->handlers[$A].insn_code = CODE_FOR_$(mod$a3$)",
  90   "umod_optab->handlers[$A].insn_code = CODE_FOR_$(umod$a3$)",
  91   "ftrunc_optab->handlers[$A].insn_code = CODE_FOR_$(ftrunc$F$a2$)",
  92   "and_optab->handlers[$A].insn_code = CODE_FOR_$(and$a3$)",
  93   "ior_optab->handlers[$A].insn_code = CODE_FOR_$(ior$a3$)",
  94   "xor_optab->handlers[$A].insn_code = CODE_FOR_$(xor$a3$)",
  95   "ashl_optab->handlers[$A].insn_code = CODE_FOR_$(ashl$a3$)",
  96   "ashr_optab->handlers[$A].insn_code = CODE_FOR_$(ashr$a3$)",
  97   "lshr_optab->handlers[$A].insn_code = CODE_FOR_$(lshr$a3$)",
  98   "rotl_optab->handlers[$A].insn_code = CODE_FOR_$(rotl$a3$)",
  99   "rotr_optab->handlers[$A].insn_code = CODE_FOR_$(rotr$a3$)",
 100   "smin_optab->handlers[$A].insn_code = CODE_FOR_$(smin$I$a3$)",
 101   "smin_optab->handlers[$A].insn_code = CODE_FOR_$(min$F$a3$)",
 102   "smax_optab->handlers[$A].insn_code = CODE_FOR_$(smax$I$a3$)",
 103   "smax_optab->handlers[$A].insn_code = CODE_FOR_$(max$F$a3$)",
 104   "umin_optab->handlers[$A].insn_code = CODE_FOR_$(umin$I$a3$)",
 105   "umax_optab->handlers[$A].insn_code = CODE_FOR_$(umax$I$a3$)",
 106   "neg_optab->handlers[$A].insn_code = CODE_FOR_$(neg$P$a2$)",
 107   "negv_optab->handlers[(int) $A].insn_code =\n\
 108     neg_optab->handlers[(int) $A].insn_code = CODE_FOR_$(neg$F$a2$)",
 109   "negv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(negv$I$a2$)",
 110   "abs_optab->handlers[$A].insn_code = CODE_FOR_$(abs$P$a2$)",
 111   "absv_optab->handlers[(int) $A].insn_code =\n\
 112     abs_optab->handlers[(int) $A].insn_code = CODE_FOR_$(abs$F$a2$)",
 113   "absv_optab->handlers[(int) $A].insn_code = CODE_FOR_$(absv$I$a2$)",
 114   "sqrt_optab->handlers[$A].insn_code = CODE_FOR_$(sqrt$a2$)",
 115   "sin_optab->handlers[$A].insn_code = CODE_FOR_$(sin$a2$)",
 116   "cos_optab->handlers[$A].insn_code = CODE_FOR_$(cos$a2$)",
 117   "strlen_optab->handlers[$A].insn_code = CODE_FOR_$(strlen$a$)",
 118   "one_cmpl_optab->handlers[$A].insn_code = CODE_FOR_$(one_cmpl$a2$)",
 119   "ffs_optab->handlers[$A].insn_code = CODE_FOR_$(ffs$a2$)",
 120   "mov_optab->handlers[$A].insn_code = CODE_FOR_$(mov$a$)",
 121   "movstrict_optab->handlers[$A].insn_code = CODE_FOR_$(movstrict$a$)",
 122   "cmp_optab->handlers[$A].insn_code = CODE_FOR_$(cmp$a$)",
 123   "tst_optab->handlers[$A].insn_code = CODE_FOR_$(tst$a$)",
 124   "bcc_gen_fctn[$C] = gen_$(b$c$)",
 125   "setcc_gen_code[$C] = CODE_FOR_$(s$c$)",
 126   "movcc_gen_code[$A] = CODE_FOR_$(mov$acc$)",
 127   "cbranch_optab->handlers[$A].insn_code = CODE_FOR_$(cbranch$a4$)",
 128   "cmov_optab->handlers[$A].insn_code = CODE_FOR_$(cmov$a6$)",
 129   "cstore_optab->handlers[$A].insn_code = CODE_FOR_$(cstore$a4$)",
 130   "push_optab->handlers[$A].insn_code = CODE_FOR_$(push$a1$)",
 131   "reload_in_optab[$A] = CODE_FOR_$(reload_in$a$)",
 132   "reload_out_optab[$A] = CODE_FOR_$(reload_out$a$)",
 133   "movstr_optab[$A] = CODE_FOR_$(movstr$a$)",
 134   "clrstr_optab[$A] = CODE_FOR_$(clrstr$a$)" };
 135
 136 static void gen_insn PARAMS ((rtx));
 137
 138 static void
 139 gen_insn (insn)
 140      rtx insn;
 141 {
 142   const char *name = XSTR (insn, 0);
 143   int m1 = 0, m2 = 0, op = 0;
 144   size_t pindex;
 145   int i;
 146   const char *np, *pp, *p, *q;
 147
 148   /* Don't mention instructions whose names are the null string.
 149      They are in the machine description just to be recognized.  */
 150   if (*name == 0)
 151     return;
 152
 153   /* See if NAME matches one of the patterns we have for the optabs we know
 154      about.  */
 155
 156   for (pindex = 0; pindex < ARRAY_SIZE (optabs); pindex++)
 157     {
 158       int force_float = 0, force_int = 0, force_partial_int = 0;
 159       int force_consec = 0;
 160       int matches = 1;
 161
 162       for (pp = optabs[pindex]; pp[0] != '$' || pp[1] != '('; pp++)
 163         ;
 164
 165       for (pp += 2, np = name; matches && ! (pp[0] == '$' && pp[1] == ')');
 166            pp++)
 167         {
 168           if (*pp != '$')
 169             {
 170               if (*pp != *np++)
 171                 break;
 172             }
 173           else
 174             switch (*++pp)
 175               {
 176               case 'N':
 177                 force_consec = 1;
 178                 break;
 179               case 'I':
 180                 force_int = 1;
 181                 break;
 182               case 'P':
 183                 force_partial_int = 1;
 184                 break;
 185               case 'F':
 186                 force_float = 1;
 187                 break;
 188               case 'V':
 189                 break;
 190               case 'c':
 191                 for (op = 0; op < NUM_RTX_CODE; op++)
 192                   {
 193                     for (p = GET_RTX_NAME(op), q = np; *p; p++, q++)
 194                       if (*p != *q)
 195                         break;
 196
 197                     /* We have to be concerned about matching "gt" and
 198                        missing "gtu", e.g., so verify we have reached the
 199                        end of thing we are to match.  */
 200                     if (*p == 0 && *q == 0 && GET_RTX_CLASS(op) == '<')
 201                       break;
 202                   }
 203
 204                 if (op == NUM_RTX_CODE)
 205                   matches = 0;
 206                 else
 207                   np += strlen (GET_RTX_NAME(op));
 208                 break;
 209               case 'a':
 210               case 'b':
 211                 /* This loop will stop at the first prefix match, so
 212                    look through the modes in reverse order, in case
 213                    EXTRA_CC_MODES was used and CC is a prefix of the
 214                    CC modes (as it should be).  */
 215                 for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--)
 216                   {
 217                     for (p = GET_MODE_NAME(i), q = np; *p; p++, q++)
 218                       if (TOLOWER (*p) != *q)
 219                         break;
 220
 221                     if (*p == 0
 222                         && (! force_int || mode_class[i] == MODE_INT
 223                             || mode_class[i] == MODE_VECTOR_INT)
 224                         && (! force_partial_int
 225                             || mode_class[i] == MODE_INT
 226                             || mode_class[i] == MODE_PARTIAL_INT
 227                             || mode_class[i] == MODE_VECTOR_INT)
 228                         && (! force_float || mode_class[i] == MODE_FLOAT
 229                             || mode_class[i] == MODE_VECTOR_FLOAT))
 230                       break;
 231                   }
 232
 233                 if (i < 0)
 234                   matches = 0;
 235                 else if (*pp == 'a')
 236                   m1 = i, np += strlen (GET_MODE_NAME(i));
 237                 else
 238                   m2 = i, np += strlen (GET_MODE_NAME(i));
 239
 240                 force_int = force_partial_int = force_float = 0;
 241                 break;
 242
 243               default:
 244                 abort ();
 245               }
 246         }
 247
 248       if (matches && pp[0] == '$' && pp[1] == ')'
 249           && *np == 0
 250           && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
 251         break;
 252     }
 253
 254   if (pindex == ARRAY_SIZE (optabs))
 255     return;
 256
 257   /* We found a match.  If this pattern is only conditionally present,
 258      write out the "if" and two extra blanks.  */
 259
 260   if (*XSTR (insn, 2) != 0)
 261     printf ("  if (HAVE_%s)\n  ", name);
 262
 263   printf ("  ");
 264
 265   /* Now write out the initialization, making all required substitutions.  */
 266   for (pp = optabs[pindex]; *pp; pp++)
 267     {
 268       if (*pp != '$')
 269         putchar (*pp);
 270       else
 271         switch (*++pp)
 272           {
 273           case '(':  case ')':
 274           case 'I':  case 'F':  case 'N':
 275             break;
 276           case 'V':
 277             if (GET_MODE_CLASS (m1) == MODE_FLOAT)
 278               printf ("v");
 279             break;
 280           case 'a':
 281             for (np = GET_MODE_NAME(m1); *np; np++)
 282               putchar (TOLOWER (*np));
 283             break;
 284           case 'b':
 285             for (np = GET_MODE_NAME(m2); *np; np++)
 286               putchar (TOLOWER (*np));
 287             break;
 288           case 'A':
 289             printf ("(int) %smode", GET_MODE_NAME(m1));
 290             break;
 291           case 'B':
 292             printf ("(int) %smode", GET_MODE_NAME(m2));
 293             break;
 294           case 'c':
 295             printf ("%s", GET_RTX_NAME(op));
 296             break;
 297           case 'C':
 298             printf ("(int) ");
 299             for (np = GET_RTX_NAME(op); *np; np++)
 300               putchar (TOUPPER (*np));
 301             break;
 302           }
 303     }
 304
 305   printf (";\n");
 306 }
 307
 308 extern int main PARAMS ((int, char **));
 309
 310 int
 311 main (argc, argv)
 312      int argc;
 313      char **argv;
 314 {
 315   rtx desc;
 316
 317   progname = "genopinit";
 318
 319   if (argc <= 1)
 320     fatal ("no input file name");
 321
 322   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
 323     return (FATAL_EXIT_CODE);
 324
 325   printf ("/* Generated automatically by the program `genopinit'\n\
 326 from the machine description file `md'.  */\n\n");
 327
 328   printf ("#include \"config.h\"\n");
 329   printf ("#include \"system.h\"\n");
 330   printf ("#include \"rtl.h\"\n");
 331   printf ("#include \"flags.h\"\n");
 332   printf ("#include \"insn-config.h\"\n");
 333   printf ("#include \"recog.h\"\n");
 334   printf ("#include \"expr.h\"\n");
 335   printf ("#include \"optabs.h\"\n");
 336   printf ("#include \"reload.h\"\n\n");
 337
 338   printf ("void\ninit_all_optabs ()\n{\n");
 339
 340   /* Read the machine description.  */
 341
 342   while (1)
 343     {
 344       int line_no, insn_code_number = 0;
 345
 346       desc = read_md_rtx (&line_no, &insn_code_number);
 347       if (desc == NULL)
 348         break;
 349
 350       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
 351         gen_insn (desc);
 352     }
 353
 354   printf ("}\n");
 355
 356   fflush (stdout);
 357   return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
 358 }
 359
 360 /* Define this so we can link with print-rtl.o to get debug_rtx function.  */
 361 const char *
 362 get_insn_name (code)
 363      int code ATTRIBUTE_UNUSED;
 364 {
 365   return NULL;
 366 }