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- /* Generate code to initialize optabs from machine description.
- Copyright (C) 1993 Free Software Foundation, Inc.
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include <stdio.h>
- #include "hconfig.h"
- #include "rtl.h"
- #include "obstack.h"
- #include <ctype.h>
-
- static struct obstack obstack;
- struct obstack *rtl_obstack = &obstack;
-
- #define obstack_chunk_alloc xmalloc
- #define obstack_chunk_free free
-
- extern void free ();
- extern rtx read_rtx ();
-
- char *xmalloc ();
- static void fatal ();
- void fancy_abort ();
-
- /* Many parts of GCC use arrays that are indexed by machine mode and
- contain the insn codes for pattern in the MD file that perform a given
- operation on operands of that mode.
-
- These patterns are present in the MD file with names that contain
- the mode(s) used and the name of the operation. This program
- writes a function `init_all_optabs' that initializes the optabs with
- all the insn codes of the relevant patterns present in the MD file.
-
- This array contains a list of optabs that need to be initialized. Within
- each string, the name of the pattern to be matched against is delimited
- with %( and %). In the string, %a and %b are used to match a short mode
- name (the part of the mode name not including `mode' and converted to
- lower-case). When writing out the initializer, the entire string is
- used. %A and %B are replaced with the full name of the mode; %a and %b
- are replaced with the short form of the name, as above.
-
- If %N is present in the pattern, it means the two modes must be consecutive
- widths in the same mode class (e.g, QImode and HImode). %I means that
- only integer modes should be considered for the next mode, and %F means
- that only float modes should be considered.
-
- For some optabs, we store the operation by RTL codes. These are only
- used for comparisons. In that case, %c and %C are the lower-case and
- upper-case forms of the comparison, respectively. */
-
- /* The reason we use \% is to avoid sequences of the form %-capletter-%
- which SCCS treats as magic. This gets warnings which you should ignore. */
-
- char *optabs[] =
- { "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)",
- "extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)",
- "fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)",
- "fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)",
- "fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)",
- "fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)",
- "floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)",
- "floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)",
- "add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)",
- "sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)",
- "smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)",
- "smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N",
- "umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N",
- "sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)",
- "udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)",
- "sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)",
- "udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)",
- "smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)",
- "umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)",
- "flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)",
- "ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)",
- "and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)",
- "ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)",
- "xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)",
- "ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)",
- "ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)",
- "lshl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshl%a3%)",
- "lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)",
- "rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)",
- "rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)",
- "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)",
- "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)",
- "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)",
- "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)",
- "umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)",
- "umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)",
- "neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)",
- "abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)",
- "sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)",
- "sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)",
- "cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)",
- "strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)",
- "one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)",
- "ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)",
- "mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)",
- "movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)",
- "cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)",
- "tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)",
- "bcc_gen_fctn[(int) %C] = gen_%(b%c%)",
- "setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)",
- "reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)",
- "reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)",
- "movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)" };
-
- /* Allow linking with print-rtl.c. */
- char **insn_name_ptr;
-
- static void
- gen_insn (insn)
- rtx insn;
- {
- char *name = XSTR (insn, 0);
- int m1, m2, op;
- int pindex;
- int i;
- char *np, *pp, *p, *q;
- struct obstack *obstack_ptr;
-
- /* Don't mention instructions whose names are the null string.
- They are in the machine description just to be recognized. */
- if (*name == 0)
- return;
-
- /* See if NAME matches one of the patterns we have for the optabs we know
- about. */
-
- for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++)
- {
- int force_float = 0, force_int = 0;
- int force_consec = 0;
- int matches = 1;
-
- for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++)
- ;
-
- for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')');
- pp++)
- {
- if (*pp != '%')
- {
- if (*pp != *np++)
- break;
- }
- else
- switch (*++pp)
- {
- case 'N':
- force_consec = 1;
- break;
- case 'I':
- force_int = 1;
- break;
- case 'F':
- force_float = 1;
- break;
- case 'c':
- for (op = 0; op < NUM_RTX_CODE; op++)
- {
- for (p = rtx_name[op], q = np; *p; p++, q++)
- if (*p != *q)
- break;
-
- /* We have to be concerned about matching "gt" and
- missing "gtu", e.g., so verify we have reached the
- end of thing we are to match. We do not have this
- problem with modes since no mode is a prefix of
- another. */
- if (*p == 0 && *q == 0 && rtx_class[op] == '<')
- break;
- }
-
- if (op == NUM_RTX_CODE)
- matches = 0;
- else
- np += strlen (rtx_name[op]);
- break;
- case 'a':
- case 'b':
- for (i = 0; i < (int) MAX_MACHINE_MODE; i++)
- {
- for (p = mode_name[i], q = np; *p; p++, q++)
- if (tolower (*p) != *q)
- break;
-
- if (*p == 0
- && (! force_int || mode_class[i] == MODE_INT)
- && (! force_float || mode_class[i] == MODE_FLOAT))
- break;
- }
-
- if (i == (int) MAX_MACHINE_MODE)
- matches = 0;
- else if (*pp == 'a')
- m1 = i, np += strlen (mode_name[i]);
- else
- m2 = i, np += strlen (mode_name[i]);
-
- force_int = force_float = 0;
- break;
-
- default:
- abort ();
- }
- }
-
- if (matches && pp[0] == '%' && pp[1] == ')'
- && *np == 0
- && (! force_consec || (int) mode_wider_mode[m1] == m2))
- break;
- }
-
- if (pindex == sizeof optabs / sizeof optabs[0])
- return;
-
- /* We found a match. If this pattern is only conditionally present,
- write out the "if" and two extra blanks. */
-
- if (*XSTR (insn, 2) != 0)
- printf (" if (HAVE_%s)\n ", name);
-
- printf (" ");
-
- /* Now write out the initialization, making all required substitutions. */
- for (pp = optabs[pindex]; *pp; pp++)
- {
- if (*pp != '%')
- printf ("%c", *pp);
- else
- switch (*++pp)
- {
- case '(': case ')':
- case 'I': case 'F': case 'N':
- break;
- case 'a':
- for (np = mode_name[m1]; *np; np++)
- printf ("%c", tolower (*np));
- break;
- case 'b':
- for (np = mode_name[m2]; *np; np++)
- printf ("%c", tolower (*np));
- break;
- case 'A':
- printf ("%smode", mode_name[m1]);
- break;
- case 'B':
- printf ("%smode", mode_name[m2]);
- break;
- case 'c':
- printf ("%s", rtx_name[op]);
- break;
- case 'C':
- for (np = rtx_name[op]; *np; np++)
- printf ("%c", toupper (*np));
- break;
- }
- }
-
- printf (";\n");
- }
-
- char *
- xmalloc (size)
- unsigned size;
- {
- register char *val = (char *) malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
-
- return val;
- }
-
- char *
- xrealloc (ptr, size)
- char *ptr;
- unsigned size;
- {
- char *result = (char *) realloc (ptr, size);
- if (!result)
- fatal ("virtual memory exhausted");
- return result;
- }
-
- static void
- fatal (s, a1, a2)
- char *s;
- {
- fprintf (stderr, "genopinit: ");
- fprintf (stderr, s, a1, a2);
- fprintf (stderr, "\n");
- exit (FATAL_EXIT_CODE);
- }
-
- /* More 'friendly' abort that prints the line and file.
- config.h can #define abort fancy_abort if you like that sort of thing. */
-
- void
- fancy_abort ()
- {
- fatal ("Internal gcc abort.");
- }
-
- int
- main (argc, argv)
- int argc;
- char **argv;
- {
- rtx desc;
- rtx dummy;
- rtx *insn_ptr;
- FILE *infile;
- register int c;
-
- obstack_init (rtl_obstack);
-
- if (argc <= 1)
- fatal ("No input file name.");
-
- infile = fopen (argv[1], "r");
- if (infile == 0)
- {
- perror (argv[1]);
- exit (FATAL_EXIT_CODE);
- }
-
- init_rtl ();
-
- printf ("/* Generated automatically by the program `genopinit'\n\
- from the machine description file `md'. */\n\n");
-
- printf ("#include \"config.h\"\n");
- printf ("#include \"rtl.h\"\n");
- printf ("#include \"flags.h\"\n");
- printf ("#include \"insn-flags.h\"\n");
- printf ("#include \"insn-codes.h\"\n");
- printf ("#include \"insn-config.h\"\n");
- printf ("#include \"recog.h\"\n");
- printf ("#include \"expr.h\"\n");
- printf ("#include \"reload.h\"\n\n");
-
- printf ("void\ninit_all_optabs ()\n{\n");
-
- /* Read the machine description. */
-
- while (1)
- {
- c = read_skip_spaces (infile);
- if (c == EOF)
- break;
- ungetc (c, infile);
-
- desc = read_rtx (infile);
- if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
- gen_insn (desc);
- }
-
- printf ("}\n");
-
- fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- /* NOTREACHED */
- return 0;
- }
-