mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-29 08:52:46 +00:00
378 lines
9.5 KiB
C
378 lines
9.5 KiB
C
/* Generate from machine description:
|
|
- some #define configuration flags.
|
|
Copyright (C) 1987, 1991, 1997, 1998,
|
|
1999, 2000 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
GCC 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.
|
|
|
|
GCC 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 GCC; 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 "errors.h"
|
|
#include "gensupport.h"
|
|
|
|
|
|
/* flags to determine output of machine description dependent #define's. */
|
|
static int max_recog_operands; /* Largest operand number seen. */
|
|
static int max_dup_operands; /* Largest number of match_dup in any insn. */
|
|
static int max_clobbers_per_insn;
|
|
static int have_cc0_flag;
|
|
static int have_cmove_flag;
|
|
static int have_cond_exec_flag;
|
|
static int have_lo_sum_flag;
|
|
static int have_peephole_flag;
|
|
static int have_peephole2_flag;
|
|
|
|
/* Maximum number of insns seen in a split. */
|
|
static int max_insns_per_split = 1;
|
|
|
|
/* Maximum number of input insns for peephole2. */
|
|
static int max_insns_per_peep2;
|
|
|
|
static int clobbers_seen_this_insn;
|
|
static int dup_operands_seen_this_insn;
|
|
|
|
static void walk_insn_part PARAMS ((rtx, int, int));
|
|
static void gen_insn PARAMS ((rtx));
|
|
static void gen_expand PARAMS ((rtx));
|
|
static void gen_split PARAMS ((rtx));
|
|
static void gen_peephole PARAMS ((rtx));
|
|
static void gen_peephole2 PARAMS ((rtx));
|
|
|
|
/* RECOG_P will be non-zero if this pattern was seen in a context where it will
|
|
be used to recognize, rather than just generate an insn.
|
|
|
|
NON_PC_SET_SRC will be non-zero if this pattern was seen in a SET_SRC
|
|
of a SET whose destination is not (pc). */
|
|
|
|
static void
|
|
walk_insn_part (part, recog_p, non_pc_set_src)
|
|
rtx part;
|
|
int recog_p;
|
|
int non_pc_set_src;
|
|
{
|
|
int i, j;
|
|
RTX_CODE code;
|
|
const char *format_ptr;
|
|
|
|
if (part == 0)
|
|
return;
|
|
|
|
code = GET_CODE (part);
|
|
switch (code)
|
|
{
|
|
case CLOBBER:
|
|
clobbers_seen_this_insn++;
|
|
break;
|
|
|
|
case MATCH_OPERAND:
|
|
if (XINT (part, 0) > max_recog_operands)
|
|
max_recog_operands = XINT (part, 0);
|
|
return;
|
|
|
|
case MATCH_OP_DUP:
|
|
case MATCH_PAR_DUP:
|
|
++dup_operands_seen_this_insn;
|
|
case MATCH_SCRATCH:
|
|
case MATCH_PARALLEL:
|
|
case MATCH_OPERATOR:
|
|
if (XINT (part, 0) > max_recog_operands)
|
|
max_recog_operands = XINT (part, 0);
|
|
/* Now scan the rtl's in the vector inside the MATCH_OPERATOR or
|
|
MATCH_PARALLEL. */
|
|
break;
|
|
|
|
case LABEL_REF:
|
|
if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND)
|
|
break;
|
|
return;
|
|
|
|
case MATCH_DUP:
|
|
++dup_operands_seen_this_insn;
|
|
if (XINT (part, 0) > max_recog_operands)
|
|
max_recog_operands = XINT (part, 0);
|
|
return;
|
|
|
|
case CC0:
|
|
if (recog_p)
|
|
have_cc0_flag = 1;
|
|
return;
|
|
|
|
case LO_SUM:
|
|
if (recog_p)
|
|
have_lo_sum_flag = 1;
|
|
return;
|
|
|
|
case SET:
|
|
walk_insn_part (SET_DEST (part), 0, recog_p);
|
|
walk_insn_part (SET_SRC (part), recog_p,
|
|
GET_CODE (SET_DEST (part)) != PC);
|
|
return;
|
|
|
|
case IF_THEN_ELSE:
|
|
/* Only consider this machine as having a conditional move if the
|
|
two arms of the IF_THEN_ELSE are both MATCH_OPERAND. Otherwise,
|
|
we have some specific IF_THEN_ELSE construct (like the doz
|
|
instruction on the RS/6000) that can't be used in the general
|
|
context we want it for. */
|
|
|
|
if (recog_p && non_pc_set_src
|
|
&& GET_CODE (XEXP (part, 1)) == MATCH_OPERAND
|
|
&& GET_CODE (XEXP (part, 2)) == MATCH_OPERAND)
|
|
have_cmove_flag = 1;
|
|
break;
|
|
|
|
case COND_EXEC:
|
|
if (recog_p)
|
|
have_cond_exec_flag = 1;
|
|
break;
|
|
|
|
case REG: case CONST_INT: case SYMBOL_REF:
|
|
case PC:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
format_ptr = GET_RTX_FORMAT (GET_CODE (part));
|
|
|
|
for (i = 0; i < GET_RTX_LENGTH (GET_CODE (part)); i++)
|
|
switch (*format_ptr++)
|
|
{
|
|
case 'e':
|
|
case 'u':
|
|
walk_insn_part (XEXP (part, i), recog_p, non_pc_set_src);
|
|
break;
|
|
case 'E':
|
|
if (XVEC (part, i) != NULL)
|
|
for (j = 0; j < XVECLEN (part, i); j++)
|
|
walk_insn_part (XVECEXP (part, i, j), recog_p, non_pc_set_src);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gen_insn (insn)
|
|
rtx insn;
|
|
{
|
|
int i;
|
|
|
|
/* Walk the insn pattern to gather the #define's status. */
|
|
clobbers_seen_this_insn = 0;
|
|
dup_operands_seen_this_insn = 0;
|
|
if (XVEC (insn, 1) != 0)
|
|
for (i = 0; i < XVECLEN (insn, 1); i++)
|
|
walk_insn_part (XVECEXP (insn, 1, i), 1, 0);
|
|
|
|
if (clobbers_seen_this_insn > max_clobbers_per_insn)
|
|
max_clobbers_per_insn = clobbers_seen_this_insn;
|
|
if (dup_operands_seen_this_insn > max_dup_operands)
|
|
max_dup_operands = dup_operands_seen_this_insn;
|
|
}
|
|
|
|
/* Similar but scan a define_expand. */
|
|
|
|
static void
|
|
gen_expand (insn)
|
|
rtx insn;
|
|
{
|
|
int i;
|
|
|
|
/* Walk the insn pattern to gather the #define's status. */
|
|
|
|
/* Note that we don't bother recording the number of MATCH_DUPs
|
|
that occur in a gen_expand, because only reload cares about that. */
|
|
if (XVEC (insn, 1) != 0)
|
|
for (i = 0; i < XVECLEN (insn, 1); i++)
|
|
{
|
|
/* Compute the maximum SETs and CLOBBERS
|
|
in any one of the sub-insns;
|
|
don't sum across all of them. */
|
|
clobbers_seen_this_insn = 0;
|
|
|
|
walk_insn_part (XVECEXP (insn, 1, i), 0, 0);
|
|
|
|
if (clobbers_seen_this_insn > max_clobbers_per_insn)
|
|
max_clobbers_per_insn = clobbers_seen_this_insn;
|
|
}
|
|
}
|
|
|
|
/* Similar but scan a define_split. */
|
|
|
|
static void
|
|
gen_split (split)
|
|
rtx split;
|
|
{
|
|
int i;
|
|
|
|
/* Look through the patterns that are matched
|
|
to compute the maximum operand number. */
|
|
for (i = 0; i < XVECLEN (split, 0); i++)
|
|
walk_insn_part (XVECEXP (split, 0, i), 1, 0);
|
|
/* Look at the number of insns this insn could split into. */
|
|
if (XVECLEN (split, 2) > max_insns_per_split)
|
|
max_insns_per_split = XVECLEN (split, 2);
|
|
}
|
|
|
|
static void
|
|
gen_peephole (peep)
|
|
rtx peep;
|
|
{
|
|
int i;
|
|
|
|
/* Look through the patterns that are matched
|
|
to compute the maximum operand number. */
|
|
for (i = 0; i < XVECLEN (peep, 0); i++)
|
|
walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
|
|
}
|
|
|
|
static void
|
|
gen_peephole2 (peep)
|
|
rtx peep;
|
|
{
|
|
int i, n;
|
|
|
|
/* Look through the patterns that are matched
|
|
to compute the maximum operand number. */
|
|
for (i = XVECLEN (peep, 0) - 1; i >= 0; --i)
|
|
walk_insn_part (XVECEXP (peep, 0, i), 1, 0);
|
|
|
|
/* Look at the number of insns this insn can be matched from. */
|
|
for (i = XVECLEN (peep, 0) - 1, n = 0; i >= 0; --i)
|
|
if (GET_CODE (XVECEXP (peep, 0, i)) != MATCH_DUP
|
|
&& GET_CODE (XVECEXP (peep, 0, i)) != MATCH_SCRATCH)
|
|
n++;
|
|
if (n > max_insns_per_peep2)
|
|
max_insns_per_peep2 = n;
|
|
}
|
|
|
|
extern int main PARAMS ((int, char **));
|
|
|
|
int
|
|
main (argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
rtx desc;
|
|
|
|
progname = "genconfig";
|
|
|
|
if (argc <= 1)
|
|
fatal ("no input file name");
|
|
|
|
if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
|
|
return (FATAL_EXIT_CODE);
|
|
|
|
puts ("/* Generated automatically by the program `genconfig'");
|
|
puts (" from the machine description file `md'. */\n");
|
|
puts ("#ifndef GCC_INSN_CONFIG_H");
|
|
puts ("#define GCC_INSN_CONFIG_H\n");
|
|
|
|
/* Allow at least 30 operands for the sake of asm constructs. */
|
|
/* ??? We *really* ought to reorganize things such that there
|
|
is no fixed upper bound. */
|
|
max_recog_operands = 29; /* We will add 1 later. */
|
|
max_dup_operands = 1;
|
|
|
|
/* Read the machine description. */
|
|
|
|
while (1)
|
|
{
|
|
int line_no, insn_code_number = 0;
|
|
|
|
desc = read_md_rtx (&line_no, &insn_code_number);
|
|
if (desc == NULL)
|
|
break;
|
|
|
|
switch (GET_CODE (desc))
|
|
{
|
|
case DEFINE_INSN:
|
|
gen_insn (desc);
|
|
break;
|
|
|
|
case DEFINE_EXPAND:
|
|
gen_expand (desc);
|
|
break;
|
|
|
|
case DEFINE_SPLIT:
|
|
gen_split (desc);
|
|
break;
|
|
|
|
case DEFINE_PEEPHOLE2:
|
|
have_peephole2_flag = 1;
|
|
gen_peephole2 (desc);
|
|
break;
|
|
|
|
case DEFINE_PEEPHOLE:
|
|
have_peephole_flag = 1;
|
|
gen_peephole (desc);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
printf ("#define MAX_RECOG_OPERANDS %d\n", max_recog_operands + 1);
|
|
printf ("#define MAX_DUP_OPERANDS %d\n", max_dup_operands);
|
|
|
|
/* This is conditionally defined, in case the user writes code which emits
|
|
more splits than we can readily see (and knows s/he does it). */
|
|
printf ("#ifndef MAX_INSNS_PER_SPLIT\n");
|
|
printf ("#define MAX_INSNS_PER_SPLIT %d\n", max_insns_per_split);
|
|
printf ("#endif\n");
|
|
|
|
if (have_cc0_flag)
|
|
printf ("#define HAVE_cc0 1\n");
|
|
|
|
if (have_cmove_flag)
|
|
printf ("#define HAVE_conditional_move 1\n");
|
|
|
|
if (have_cond_exec_flag)
|
|
printf ("#define HAVE_conditional_execution 1\n");
|
|
|
|
if (have_lo_sum_flag)
|
|
printf ("#define HAVE_lo_sum 1\n");
|
|
|
|
if (have_peephole_flag)
|
|
printf ("#define HAVE_peephole 1\n");
|
|
|
|
if (have_peephole2_flag)
|
|
{
|
|
printf ("#define HAVE_peephole2 1\n");
|
|
printf ("#define MAX_INSNS_PER_PEEP2 %d\n", max_insns_per_peep2);
|
|
}
|
|
|
|
puts("\n#endif /* GCC_INSN_CONFIG_H */");
|
|
|
|
if (ferror (stdout) || fflush (stdout) || fclose (stdout))
|
|
return FATAL_EXIT_CODE;
|
|
|
|
return SUCCESS_EXIT_CODE;
|
|
}
|
|
|
|
/* Define this so we can link with print-rtl.o to get debug_rtx function. */
|
|
const char *
|
|
get_insn_name (code)
|
|
int code ATTRIBUTE_UNUSED;
|
|
{
|
|
return NULL;
|
|
}
|