mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-11-29 08:52:46 +00:00
416 lines
9.6 KiB
C
416 lines
9.6 KiB
C
/* Generate code to allocate RTL structures.
|
||
Copyright (C) 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"
|
||
|
||
#define NO_GENRTL_H
|
||
#include "rtl.h"
|
||
#undef abort
|
||
|
||
#include "real.h"
|
||
|
||
/* Calculate the format for CONST_DOUBLE. This depends on the relative
|
||
widths of HOST_WIDE_INT and REAL_VALUE_TYPE.
|
||
|
||
We need to go out to e0wwwww, since REAL_ARITHMETIC assumes 16-bits
|
||
per element in REAL_VALUE_TYPE.
|
||
|
||
This is duplicated in rtl.c.
|
||
|
||
A number of places assume that there are always at least two 'w'
|
||
slots in a CONST_DOUBLE, so we provide them even if one would suffice. */
|
||
|
||
#ifdef REAL_ARITHMETIC
|
||
# if MAX_LONG_DOUBLE_TYPE_SIZE == 96
|
||
# define REAL_WIDTH \
|
||
(11*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
|
||
# else
|
||
# if MAX_LONG_DOUBLE_TYPE_SIZE == 128
|
||
# define REAL_WIDTH \
|
||
(19*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
|
||
# else
|
||
# if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
|
||
# define REAL_WIDTH \
|
||
(7*8 + HOST_BITS_PER_WIDE_INT)/HOST_BITS_PER_WIDE_INT
|
||
# endif
|
||
# endif
|
||
# endif
|
||
#endif /* REAL_ARITHMETIC */
|
||
|
||
#ifndef REAL_WIDTH
|
||
# if HOST_BITS_PER_WIDE_INT*2 >= MAX_LONG_DOUBLE_TYPE_SIZE
|
||
# define REAL_WIDTH 2
|
||
# else
|
||
# if HOST_BITS_PER_WIDE_INT*3 >= MAX_LONG_DOUBLE_TYPE_SIZE
|
||
# define REAL_WIDTH 3
|
||
# else
|
||
# if HOST_BITS_PER_WIDE_INT*4 >= MAX_LONG_DOUBLE_TYPE_SIZE
|
||
# define REAL_WIDTH 4
|
||
# endif
|
||
# endif
|
||
# endif
|
||
#endif /* REAL_WIDTH */
|
||
|
||
#if REAL_WIDTH == 1
|
||
# define CONST_DOUBLE_FORMAT "0ww"
|
||
#else
|
||
# if REAL_WIDTH == 2
|
||
# define CONST_DOUBLE_FORMAT "0ww"
|
||
# else
|
||
# if REAL_WIDTH == 3
|
||
# define CONST_DOUBLE_FORMAT "0www"
|
||
# else
|
||
# if REAL_WIDTH == 4
|
||
# define CONST_DOUBLE_FORMAT "0wwww"
|
||
# else
|
||
# if REAL_WIDTH == 5
|
||
# define CONST_DOUBLE_FORMAT "0wwwww"
|
||
# else
|
||
# define CONST_DOUBLE_FORMAT /* nothing - will cause syntax error */
|
||
# endif
|
||
# endif
|
||
# endif
|
||
# endif
|
||
#endif
|
||
|
||
|
||
struct rtx_definition
|
||
{
|
||
const char *const enumname, *const name, *const format;
|
||
};
|
||
|
||
#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT },
|
||
|
||
static const struct rtx_definition defs[] =
|
||
{
|
||
#include "rtl.def" /* rtl expressions are documented here */
|
||
};
|
||
|
||
static const char *formats[NUM_RTX_CODE];
|
||
|
||
static const char *type_from_format PARAMS ((int));
|
||
static const char *accessor_from_format PARAMS ((int));
|
||
static int special_format PARAMS ((const char *));
|
||
static int special_rtx PARAMS ((int));
|
||
static void find_formats PARAMS ((void));
|
||
static void gendecl PARAMS ((const char *));
|
||
static void genmacro PARAMS ((int));
|
||
static void gendef PARAMS ((const char *));
|
||
static void genlegend PARAMS ((void));
|
||
static void genheader PARAMS ((void));
|
||
static void gencode PARAMS ((void));
|
||
|
||
/* Decode a format letter into a C type string. */
|
||
|
||
static const char *
|
||
type_from_format (c)
|
||
int c;
|
||
{
|
||
switch (c)
|
||
{
|
||
case 'i':
|
||
return "int ";
|
||
|
||
case 'w':
|
||
return "HOST_WIDE_INT ";
|
||
|
||
case 's':
|
||
return "const char *";
|
||
|
||
case 'e': case 'u':
|
||
return "rtx ";
|
||
|
||
case 'E':
|
||
return "rtvec ";
|
||
case 'b':
|
||
return "struct bitmap_head_def *"; /* bitmap - typedef not available */
|
||
case 't':
|
||
return "union tree_node *"; /* tree - typedef not available */
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* Decode a format letter into the proper accessor function. */
|
||
|
||
static const char *
|
||
accessor_from_format (c)
|
||
int c;
|
||
{
|
||
switch (c)
|
||
{
|
||
case 'i':
|
||
return "XINT";
|
||
|
||
case 'w':
|
||
return "XWINT";
|
||
|
||
case 's':
|
||
return "XSTR";
|
||
|
||
case 'e': case 'u':
|
||
return "XEXP";
|
||
|
||
case 'E':
|
||
return "XVEC";
|
||
|
||
case 'b':
|
||
return "XBITMAP";
|
||
|
||
case 't':
|
||
return "XTREE";
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* Return nonzero if we should ignore FMT, an RTL format, when making
|
||
the list of formats we write routines to create. */
|
||
|
||
static int
|
||
special_format (fmt)
|
||
const char *fmt;
|
||
{
|
||
return (strchr (fmt, '*') != 0
|
||
|| strchr (fmt, 'V') != 0
|
||
|| strchr (fmt, 'S') != 0
|
||
|| strchr (fmt, 'n') != 0);
|
||
}
|
||
|
||
/* Return nonzero if the RTL code given by index IDX is one that we should not
|
||
generate a gen_RTX_FOO function foo (because that function is present
|
||
elsewhere in the compiler). */
|
||
|
||
static int
|
||
special_rtx (idx)
|
||
int idx;
|
||
{
|
||
return (strcmp (defs[idx].enumname, "CONST_INT") == 0
|
||
|| strcmp (defs[idx].enumname, "CONST_DOUBLE") == 0
|
||
|| strcmp (defs[idx].enumname, "REG") == 0
|
||
|| strcmp (defs[idx].enumname, "SUBREG") == 0
|
||
|| strcmp (defs[idx].enumname, "MEM") == 0);
|
||
}
|
||
|
||
/* Place a list of all format specifiers we use into the array FORMAT. */
|
||
|
||
static void
|
||
find_formats ()
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||
{
|
||
const char **f;
|
||
|
||
if (special_format (defs[i].format))
|
||
continue;
|
||
|
||
for (f = formats; *f; f++)
|
||
if (! strcmp (*f, defs[i].format))
|
||
break;
|
||
|
||
if (*f == 0)
|
||
*f = defs[i].format;
|
||
}
|
||
}
|
||
|
||
/* Write the declarations for the routine to allocate RTL with FORMAT. */
|
||
|
||
static void
|
||
gendecl (format)
|
||
const char *format;
|
||
{
|
||
const char *p;
|
||
int i, pos;
|
||
|
||
printf ("extern rtx gen_rtx_fmt_%s\tPARAMS ((RTX_CODE, ", format);
|
||
printf ("enum machine_mode mode");
|
||
|
||
/* Write each parameter that is needed and start a new line when the line
|
||
would overflow. */
|
||
for (p = format, i = 0, pos = 75; *p != 0; p++)
|
||
if (*p != '0')
|
||
{
|
||
int ourlen = strlen (type_from_format (*p)) + 6 + (i > 9);
|
||
|
||
printf (",");
|
||
if (pos + ourlen > 76)
|
||
printf ("\n\t\t\t\t "), pos = 39;
|
||
|
||
printf (" %sarg%d", type_from_format (*p), i++);
|
||
pos += ourlen;
|
||
}
|
||
|
||
printf ("));\n");
|
||
}
|
||
|
||
/* Generate macros to generate RTL of code IDX using the functions we
|
||
write. */
|
||
|
||
static void
|
||
genmacro (idx)
|
||
int idx;
|
||
{
|
||
const char *p;
|
||
int i;
|
||
|
||
/* We write a macro that defines gen_rtx_RTLCODE to be an equivalent to
|
||
gen_rtx_fmt_FORMAT where FORMAT is the RTX_FORMAT of RTLCODE. */
|
||
|
||
printf ("#define gen_rtx_%s%s(MODE",
|
||
special_rtx (idx) ? "raw_" : "", defs[idx].enumname);
|
||
|
||
for (p = defs[idx].format, i = 0; *p != 0; p++)
|
||
if (*p != '0')
|
||
printf (", ARG%d", i++);
|
||
|
||
printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
|
||
defs[idx].format, defs[idx].enumname);
|
||
|
||
for (p = defs[idx].format, i = 0; *p != 0; p++)
|
||
if (*p != '0')
|
||
printf (", (ARG%d)", i++);
|
||
|
||
puts (")");
|
||
}
|
||
|
||
/* Generate the code for the function to generate RTL whose
|
||
format is FORMAT. */
|
||
|
||
static void
|
||
gendef (format)
|
||
const char *format;
|
||
{
|
||
const char *p;
|
||
int i, j;
|
||
|
||
/* Start by writing the definition of the function name and the types
|
||
of the arguments. */
|
||
|
||
printf ("rtx\ngen_rtx_fmt_%s (code, mode", format);
|
||
for (p = format, i = 0; *p != 0; p++)
|
||
if (*p != '0')
|
||
printf (", arg%d", i++);
|
||
|
||
puts (")\n RTX_CODE code;\n enum machine_mode mode;");
|
||
for (p = format, i = 0; *p != 0; p++)
|
||
if (*p != '0')
|
||
printf (" %sarg%d;\n", type_from_format (*p), i++);
|
||
|
||
/* Now write out the body of the function itself, which allocates
|
||
the memory and initializes it. */
|
||
puts ("{");
|
||
puts (" rtx rt;");
|
||
printf (" rt = ggc_alloc_rtx (%d);\n", (int) strlen (format));
|
||
|
||
puts (" memset (rt, 0, sizeof (struct rtx_def) - sizeof (rtunion));\n");
|
||
puts (" PUT_CODE (rt, code);");
|
||
puts (" PUT_MODE (rt, mode);");
|
||
|
||
for (p = format, i = j = 0; *p ; ++p, ++i)
|
||
if (*p != '0')
|
||
printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
|
||
else
|
||
printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
|
||
|
||
puts ("\n return rt;\n}\n");
|
||
}
|
||
|
||
/* Generate the documentation header for files we write. */
|
||
|
||
static void
|
||
genlegend ()
|
||
{
|
||
puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
|
||
}
|
||
|
||
/* Generate the text of the header file we make, genrtl.h. */
|
||
|
||
static void
|
||
genheader ()
|
||
{
|
||
int i;
|
||
const char **fmt;
|
||
|
||
puts ("#ifndef GCC_GENRTL_H");
|
||
puts ("#define GCC_GENRTL_H\n");
|
||
|
||
for (fmt = formats; *fmt; ++fmt)
|
||
gendecl (*fmt);
|
||
|
||
putchar ('\n');
|
||
|
||
for (i = 0; i < NUM_RTX_CODE; i++)
|
||
if (! special_format (defs[i].format))
|
||
genmacro (i);
|
||
|
||
puts ("\n#endif /* GCC_GENRTL_H */");
|
||
}
|
||
|
||
/* Generate the text of the code file we write, genrtl.c. */
|
||
|
||
static void
|
||
gencode ()
|
||
{
|
||
const char **fmt;
|
||
|
||
puts ("#include \"config.h\"");
|
||
puts ("#include \"system.h\"");
|
||
puts ("#include \"obstack.h\"");
|
||
puts ("#include \"rtl.h\"");
|
||
puts ("#include \"ggc.h\"\n");
|
||
puts ("extern struct obstack *rtl_obstack;\n");
|
||
puts ("#define obstack_alloc_rtx(n) \\");
|
||
puts (" ((rtx) obstack_alloc (rtl_obstack, \\");
|
||
puts (" sizeof (struct rtx_def) \\");
|
||
puts (" + ((n) - 1) * sizeof (rtunion)))\n");
|
||
|
||
for (fmt = formats; *fmt != 0; fmt++)
|
||
gendef (*fmt);
|
||
}
|
||
|
||
/* This is the main program. We accept only one argument, "-h", which
|
||
says we are writing the genrtl.h file. Otherwise we are writing the
|
||
genrtl.c file. */
|
||
extern int main PARAMS ((int, char **));
|
||
|
||
int
|
||
main (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
find_formats ();
|
||
genlegend ();
|
||
|
||
if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
|
||
genheader ();
|
||
else
|
||
gencode ();
|
||
|
||
if (ferror (stdout) || fflush (stdout) || fclose (stdout))
|
||
return FATAL_EXIT_CODE;
|
||
|
||
return SUCCESS_EXIT_CODE;
|
||
}
|