400 lines
12 KiB
C
400 lines
12 KiB
C
/* Generate code to initialize optabs from machine description.
|
||
Copyright (C) 1993, 94-98, 1999 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, 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
|
||
#include "hconfig.h"
|
||
#include "system.h"
|
||
#include "rtl.h"
|
||
#include "obstack.h"
|
||
|
||
static struct obstack obstack;
|
||
struct obstack *rtl_obstack = &obstack;
|
||
|
||
#define obstack_chunk_alloc xmalloc
|
||
#define obstack_chunk_free free
|
||
|
||
void fatal PVPROTO ((const char *, ...))
|
||
ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
|
||
void fancy_abort PROTO((void)) ATTRIBUTE_NORETURN;
|
||
|
||
/* 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. */
|
||
|
||
const 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%)",
|
||
"umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)",
|
||
"smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)",
|
||
"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%)",
|
||
"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%)",
|
||
"movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)",
|
||
"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%)",
|
||
"clrstr_optab[(int) %A] = CODE_FOR_%(clrstr%a%)" };
|
||
|
||
/* Allow linking with print-rtl.c. */
|
||
char **insn_name_ptr;
|
||
|
||
static void gen_insn PROTO((rtx));
|
||
|
||
static void
|
||
gen_insn (insn)
|
||
rtx insn;
|
||
{
|
||
char *name = XSTR (insn, 0);
|
||
int m1, m2, op;
|
||
size_t pindex;
|
||
int i;
|
||
const char *np, *pp, *p, *q;
|
||
|
||
/* 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. */
|
||
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':
|
||
/* This loop will stop at the first prefix match, so
|
||
look through the modes in reverse order, in case
|
||
EXTRA_CC_MODES was used and CC is a prefix of the
|
||
CC modes (as it should be). */
|
||
for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--)
|
||
{
|
||
for (p = mode_name[i], q = np; *p; p++, q++)
|
||
if (tolower ((unsigned char)*p) != *q)
|
||
break;
|
||
|
||
if (*p == 0
|
||
&& (! force_int || mode_class[i] == MODE_INT)
|
||
&& (! force_float || mode_class[i] == MODE_FLOAT))
|
||
break;
|
||
}
|
||
|
||
if (i < 0)
|
||
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) GET_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 ((unsigned char)*np));
|
||
break;
|
||
case 'b':
|
||
for (np = mode_name[m2]; *np; np++)
|
||
printf ("%c", tolower ((unsigned char)*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 ((unsigned char)*np));
|
||
break;
|
||
}
|
||
}
|
||
|
||
printf (";\n");
|
||
}
|
||
|
||
PTR
|
||
xmalloc (size)
|
||
size_t size;
|
||
{
|
||
register PTR val = (PTR) malloc (size);
|
||
|
||
if (val == 0)
|
||
fatal ("virtual memory exhausted");
|
||
|
||
return val;
|
||
}
|
||
|
||
PTR
|
||
xrealloc (old, size)
|
||
PTR old;
|
||
size_t size;
|
||
{
|
||
register PTR ptr;
|
||
if (old)
|
||
ptr = (PTR) realloc (old, size);
|
||
else
|
||
ptr = (PTR) malloc (size);
|
||
if (!ptr)
|
||
fatal ("virtual memory exhausted");
|
||
return ptr;
|
||
}
|
||
|
||
void
|
||
fatal VPROTO ((const char *format, ...))
|
||
{
|
||
#ifndef ANSI_PROTOTYPES
|
||
const char *format;
|
||
#endif
|
||
va_list ap;
|
||
|
||
VA_START (ap, format);
|
||
|
||
#ifndef ANSI_PROTOTYPES
|
||
format = va_arg (ap, const char *);
|
||
#endif
|
||
|
||
fprintf (stderr, "genopinit: ");
|
||
vfprintf (stderr, format, ap);
|
||
va_end (ap);
|
||
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;
|
||
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 \"system.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;
|
||
}
|