401 lines
12 KiB
C
401 lines
12 KiB
C
/* Generate code to initialize optabs from machine description.
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Copyright (C) 1993, 94-97, 1998 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "hconfig.h"
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include "system.h"
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#include "rtl.h"
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#include "obstack.h"
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static struct obstack obstack;
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struct obstack *rtl_obstack = &obstack;
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free free
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char *xmalloc PROTO((unsigned));
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static void fatal PVPROTO ((char *, ...)) ATTRIBUTE_PRINTF_1;
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void fancy_abort PROTO((void));
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/* Many parts of GCC use arrays that are indexed by machine mode and
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contain the insn codes for pattern in the MD file that perform a given
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operation on operands of that mode.
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These patterns are present in the MD file with names that contain
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the mode(s) used and the name of the operation. This program
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writes a function `init_all_optabs' that initializes the optabs with
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all the insn codes of the relevant patterns present in the MD file.
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This array contains a list of optabs that need to be initialized. Within
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each string, the name of the pattern to be matched against is delimited
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with %( and %). In the string, %a and %b are used to match a short mode
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name (the part of the mode name not including `mode' and converted to
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lower-case). When writing out the initializer, the entire string is
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used. %A and %B are replaced with the full name of the mode; %a and %b
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are replaced with the short form of the name, as above.
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If %N is present in the pattern, it means the two modes must be consecutive
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widths in the same mode class (e.g, QImode and HImode). %I means that
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only integer modes should be considered for the next mode, and %F means
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that only float modes should be considered.
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For some optabs, we store the operation by RTL codes. These are only
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used for comparisons. In that case, %c and %C are the lower-case and
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upper-case forms of the comparison, respectively. */
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/* The reason we use \% is to avoid sequences of the form %-capletter-%
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which SCCS treats as magic. This gets warnings which you should ignore. */
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char *optabs[] =
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{ "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)",
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"extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)",
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"fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)",
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"fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)",
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"fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)",
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"fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)",
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"floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)",
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"floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)",
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"add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)",
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"sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)",
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"smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)",
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"umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)",
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"smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)",
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"smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N",
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"umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N",
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"sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)",
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"udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)",
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"sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)",
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"udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)",
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"smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)",
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"umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)",
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"flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)",
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"ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)",
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"and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)",
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"ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)",
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"xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)",
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"ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)",
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"ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)",
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"lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)",
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"rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)",
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"rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)",
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"smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)",
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"smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)",
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"smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)",
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"smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)",
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"umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)",
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"umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)",
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"neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)",
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"abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)",
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"sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)",
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"sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)",
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"cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)",
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"strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)",
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"one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)",
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"ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)",
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"mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)",
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"movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)",
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"cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)",
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"tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)",
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"bcc_gen_fctn[(int) %C] = gen_%(b%c%)",
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"setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)",
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"movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)",
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"reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)",
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"reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)",
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"movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)",
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"clrstr_optab[(int) %A] = CODE_FOR_%(clrstr%a%)" };
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/* Allow linking with print-rtl.c. */
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char **insn_name_ptr;
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static void gen_insn PROTO((rtx));
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static void
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gen_insn (insn)
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rtx insn;
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{
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char *name = XSTR (insn, 0);
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int m1, m2, op;
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size_t pindex;
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int i;
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char *np, *pp, *p, *q;
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/* Don't mention instructions whose names are the null string.
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They are in the machine description just to be recognized. */
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if (*name == 0)
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return;
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/* See if NAME matches one of the patterns we have for the optabs we know
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about. */
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for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++)
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{
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int force_float = 0, force_int = 0;
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int force_consec = 0;
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int matches = 1;
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for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++)
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;
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for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')');
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pp++)
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{
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if (*pp != '%')
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{
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if (*pp != *np++)
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break;
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}
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else
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switch (*++pp)
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{
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case 'N':
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force_consec = 1;
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break;
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case 'I':
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force_int = 1;
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break;
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case 'F':
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force_float = 1;
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break;
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case 'c':
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for (op = 0; op < NUM_RTX_CODE; op++)
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{
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for (p = rtx_name[op], q = np; *p; p++, q++)
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if (*p != *q)
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break;
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/* We have to be concerned about matching "gt" and
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missing "gtu", e.g., so verify we have reached the
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end of thing we are to match. */
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if (*p == 0 && *q == 0 && rtx_class[op] == '<')
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break;
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}
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if (op == NUM_RTX_CODE)
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matches = 0;
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else
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np += strlen (rtx_name[op]);
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break;
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case 'a':
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case 'b':
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/* This loop will stop at the first prefix match, so
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look through the modes in reverse order, in case
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EXTRA_CC_MODES was used and CC is a prefix of the
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CC modes (as it should be). */
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for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--)
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{
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for (p = mode_name[i], q = np; *p; p++, q++)
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if (tolower (*p) != *q)
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break;
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if (*p == 0
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&& (! force_int || mode_class[i] == MODE_INT)
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&& (! force_float || mode_class[i] == MODE_FLOAT))
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break;
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}
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if (i < 0)
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matches = 0;
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else if (*pp == 'a')
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m1 = i, np += strlen (mode_name[i]);
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else
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m2 = i, np += strlen (mode_name[i]);
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force_int = force_float = 0;
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break;
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default:
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abort ();
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}
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}
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if (matches && pp[0] == '%' && pp[1] == ')'
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&& *np == 0
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&& (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
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break;
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}
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if (pindex == sizeof optabs / sizeof optabs[0])
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return;
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/* We found a match. If this pattern is only conditionally present,
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write out the "if" and two extra blanks. */
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if (*XSTR (insn, 2) != 0)
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printf (" if (HAVE_%s)\n ", name);
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printf (" ");
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/* Now write out the initialization, making all required substitutions. */
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for (pp = optabs[pindex]; *pp; pp++)
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{
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if (*pp != '%')
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printf ("%c", *pp);
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else
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switch (*++pp)
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{
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case '(': case ')':
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case 'I': case 'F': case 'N':
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break;
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case 'a':
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for (np = mode_name[m1]; *np; np++)
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printf ("%c", tolower (*np));
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break;
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case 'b':
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for (np = mode_name[m2]; *np; np++)
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printf ("%c", tolower (*np));
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break;
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case 'A':
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printf ("%smode", mode_name[m1]);
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break;
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case 'B':
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printf ("%smode", mode_name[m2]);
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break;
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case 'c':
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printf ("%s", rtx_name[op]);
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break;
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case 'C':
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for (np = rtx_name[op]; *np; np++)
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printf ("%c", toupper (*np));
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break;
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}
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}
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printf (";\n");
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}
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char *
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xmalloc (size)
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unsigned size;
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{
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register char *val = (char *) malloc (size);
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if (val == 0)
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fatal ("virtual memory exhausted");
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return val;
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}
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char *
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xrealloc (ptr, size)
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char *ptr;
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unsigned size;
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{
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char *result = (char *) realloc (ptr, size);
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if (!result)
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fatal ("virtual memory exhausted");
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return result;
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}
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static void
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fatal VPROTO ((char *format, ...))
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{
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#ifndef __STDC__
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char *format;
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#endif
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va_list ap;
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VA_START (ap, format);
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#ifndef __STDC__
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format = va_arg (ap, char *);
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#endif
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fprintf (stderr, "genopinit: ");
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vfprintf (stderr, format, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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exit (FATAL_EXIT_CODE);
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}
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/* More 'friendly' abort that prints the line and file.
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config.h can #define abort fancy_abort if you like that sort of thing. */
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void
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fancy_abort ()
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{
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fatal ("Internal gcc abort.");
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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rtx desc;
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FILE *infile;
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register int c;
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obstack_init (rtl_obstack);
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if (argc <= 1)
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fatal ("No input file name.");
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infile = fopen (argv[1], "r");
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if (infile == 0)
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{
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perror (argv[1]);
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exit (FATAL_EXIT_CODE);
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}
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init_rtl ();
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printf ("/* Generated automatically by the program `genopinit'\n\
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from the machine description file `md'. */\n\n");
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printf ("#include \"config.h\"\n");
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printf ("#include \"system.h\"\n");
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printf ("#include \"rtl.h\"\n");
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printf ("#include \"flags.h\"\n");
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printf ("#include \"insn-flags.h\"\n");
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printf ("#include \"insn-codes.h\"\n");
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printf ("#include \"insn-config.h\"\n");
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printf ("#include \"recog.h\"\n");
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printf ("#include \"expr.h\"\n");
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printf ("#include \"reload.h\"\n\n");
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printf ("void\ninit_all_optabs ()\n{\n");
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/* Read the machine description. */
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while (1)
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{
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c = read_skip_spaces (infile);
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if (c == EOF)
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break;
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ungetc (c, infile);
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desc = read_rtx (infile);
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if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
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gen_insn (desc);
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}
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printf ("}\n");
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fflush (stdout);
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exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
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/* NOTREACHED */
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return 0;
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}
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