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tumbledemerald-legacy/agbcc/gcc_arm/genopinit.c

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import from github
2022-05-19 19:14:13 +02:00
/* 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
static 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%)",
/* CYGNUS LOCAL -- branch prediction */
"expect_optab->handlers[(int) %A].insn_code = CODE_FOR_%(expect%I\%a3%)",
/* END CYGNUS LOCAL -- branch prediction */
"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;
}
static 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;
}
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