/* Generate code to allocate RTL structures.
- Copyright (C) 1997 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU CC.
#include "hconfig.h"
#include "system.h"
-#include "obstack.h"
-#define obstack_chunk_alloc xmalloc
-#define obstack_chunk_free free
-
#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 "e0ww"
+#else
+# if REAL_WIDTH == 2
+# define CONST_DOUBLE_FORMAT "e0ww"
+# else
+# if REAL_WIDTH == 3
+# define CONST_DOUBLE_FORMAT "e0www"
+# else
+# if REAL_WIDTH == 4
+# define CONST_DOUBLE_FORMAT "e0wwww"
+# else
+# if REAL_WIDTH == 5
+# define CONST_DOUBLE_FORMAT "e0wwwww"
+# else
+# define CONST_DOUBLE_FORMAT /* nothing - will cause syntax error */
+# endif
+# endif
+# endif
+# endif
+#endif
struct rtx_definition
const char *enumname, *name, *format;
};
-#if defined(HAVE_CPP_STRINGIFY) || (defined(__GNUC__) && defined(__STDC__))
-#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { # ENUM, NAME, FORMAT },
-#else
-#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { "ENUM", NAME, FORMAT },
-#endif
+#define DEF_RTL_EXPR(ENUM, NAME, FORMAT, CLASS) { STRINGX(ENUM), NAME, FORMAT },
struct rtx_definition defs[] =
{
const char *formats[NUM_RTX_CODE];
-static const char *type_from_format PROTO((char));
-static const char *accessor_from_format PROTO((char));
-static int special_format PROTO((const char *));
-static int special_rtx PROTO((int));
-static void find_formats PROTO((void));
-static void gendecl PROTO((FILE *, const char *));
-static void genmacro PROTO((FILE *, int));
-static void gendef PROTO((FILE *, const char *));
-static void genlegend PROTO((FILE *));
-static void genheader PROTO((FILE *));
-static void gencode PROTO((FILE *));
+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));
+\f
+/* Decode a format letter into a C type string. */
static const char *
type_from_format (c)
- char c;
+ int c;
{
switch (c)
{
case 'i':
- return "int";
+ return "int ";
+
case 'w':
- return "HOST_WIDE_INT";
+ return "HOST_WIDE_INT ";
+
case 's':
- return "char *";
- case 'e':
- case 'u':
- return "rtx";
+ return "const char *";
+
+ case 'e': case 'u':
+ return "rtx ";
+
case 'E':
- return "rtvec";
+ 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)
- char c;
+ int c;
{
switch (c)
{
case 'i':
return "XINT";
+
case 'w':
return "XWINT";
+
case 's':
return "XSTR";
- case 'e':
- case 'u':
+
+ 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;
|| 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, "REG") == 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)
+ 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))
+ for (f = formats; *f; f++)
+ if (! strcmp (*f, defs[i].format))
break;
- if (!*f)
+ if (*f == 0)
*f = defs[i].format;
}
}
+/* Write the declarations for the routine to allocate RTL with FORMAT. */
+
static void
-gendecl (f, format)
- FILE *f;
+gendecl (format)
const char *format;
{
const char *p;
- int i;
+ int i, pos;
- fprintf (f, "extern rtx gen_rtx_fmt_%s PROTO((RTX_CODE, enum machine_mode mode",
- format);
- for (p = format, i = 0; *p ; ++p)
+ 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')
- fprintf (f, ", %s arg%d", type_from_format (*p), i++);
- fprintf (f, "));\n");
+ {
+ 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 (f, idx)
- FILE *f;
+genmacro (idx)
int idx;
{
const char *p;
int i;
- fprintf (f, "#define gen_rtx_%s%s(mode",
- (special_rtx (idx) ? "raw_" : ""), defs[idx].enumname);
+ /* 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. */
- for (p = defs[idx].format, i = 0; *p ; ++p)
+ 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')
- fprintf (f, ", arg%d", i++);
- fprintf (f, ") ");
+ printf (", ARG%d", i++);
+
+ printf (") \\\n gen_rtx_fmt_%s (%s, (MODE)",
+ defs[idx].format, defs[idx].enumname);
- fprintf (f, "gen_rtx_fmt_%s(%s,(mode)", defs[idx].format, defs[idx].enumname);
- for (p = defs[idx].format, i = 0; *p ; ++p)
+ for (p = defs[idx].format, i = 0; *p != 0; p++)
if (*p != '0')
- fprintf (f, ",(arg%d)", i++);
- fprintf (f, ")\n");
+ printf (", (ARG%d)", i++);
+
+ puts (")");
}
+/* Generate the code for the function to generate RTL whose
+ format is FORMAT. */
+
static void
-gendef (f, format)
- FILE *f;
+gendef (format)
const char *format;
{
const char *p;
int i, j;
- fprintf (f, "rtx\ngen_rtx_fmt_%s (code, mode", format);
- for (p = format, i = 0; *p ; ++p)
+ /* 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')
- fprintf (f, ", arg%d", i++);
+ printf (", arg%d", i++);
- fprintf (f, ")\n RTX_CODE code;\n enum machine_mode mode;\n");
- for (p = format, i = 0; *p ; ++p)
+ puts (")\n RTX_CODE code;\n enum machine_mode mode;");
+ for (p = format, i = 0; *p != 0; p++)
if (*p != '0')
- fprintf (f, " %s arg%d;\n", type_from_format (*p), i++);
+ printf (" %sarg%d;\n", type_from_format (*p), i++);
- /* See rtx_alloc in rtl.c for comments. */
- fprintf (f, "{\n");
- fprintf (f, " rtx rt = obstack_alloc_rtx (sizeof (struct rtx_def) + %d * sizeof (rtunion));\n",
- (int) strlen (format) - 1);
+ /* 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));
- fprintf (f, " PUT_CODE (rt, code);\n");
- fprintf (f, " PUT_MODE (rt, mode);\n");
+ 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')
- {
- fprintf (f, " %s (rt, %d) = arg%d;\n",
- accessor_from_format (*p), i, j++);
- }
+ printf (" %s (rt, %d) = arg%d;\n", accessor_from_format (*p), i, j++);
+ else
+ printf (" X0EXP (rt, %d) = NULL_RTX;\n", i);
- fprintf (f, "\n return rt;\n}\n\n");
+ puts ("\n return rt;\n}\n");
}
+/* Generate the documentation header for files we write. */
+
static void
-genlegend (f)
- FILE *f;
+genlegend ()
{
- fprintf (f, "/* Generated automaticaly by the program `gengenrtl'\n");
- fprintf (f, " from the RTL description file `rtl.def' */\n\n");
+ puts ("/* Generated automatically by gengenrtl from rtl.def. */\n");
}
+/* Generate the text of the header file we make, genrtl.h. */
+
static void
-genheader (f)
- FILE *f;
+genheader ()
{
int i;
const char **fmt;
+ puts ("#ifndef GCC_GENRTL_H");
+ puts ("#define GCC_GENRTL_H\n");
+
for (fmt = formats; *fmt; ++fmt)
- gendecl (f, *fmt);
+ gendecl (*fmt);
- fprintf(f, "\n");
+ putchar ('\n');
for (i = 0; i < NUM_RTX_CODE; i++)
- {
- if (special_format (defs[i].format))
- continue;
- genmacro (f, 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 (f)
- FILE *f;
+gencode ()
{
const char **fmt;
- fputs ("#include \"config.h\"\n", f);
- fputs ("#include \"obstack.h\"\n", f);
- fputs ("#include \"rtl.h\"\n\n", f);
- fputs ("extern struct obstack *rtl_obstack;\n\n", f);
- fputs ("static rtx obstack_alloc_rtx PROTO((int length));\n", f);
- fputs ("static rtx obstack_alloc_rtx (length)\n", f);
- fputs (" register int length;\n{\n", f);
- fputs (" rtx rt = (rtx) obstack_alloc (rtl_obstack, length);\n\n", f);
- fputs (" if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(int))\n", f);
- fputs (" *(int *)rt = 0;\n", f);
- fputs (" else if (sizeof(struct rtx_def) - sizeof(rtunion) == sizeof(HOST_WIDE_INT))\n", f);
- fputs (" *(HOST_WIDE_INT *)rt = 0;\n", f);
- fputs (" else\n", f);
- fputs (" bzero(rt, sizeof(struct rtx_def) - sizeof(rtunion));\n\n", f);
- fputs (" return rt;\n}\n\n", f);
-
- for (fmt = formats; *fmt; ++fmt)
- gendef (f, *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);
}
-#if defined(USE_C_ALLOCA) && !defined(__GNUC__)
-char *
+#if defined(USE_C_ALLOCA)
+PTR
xmalloc (nbytes)
- int nbytes;
+ size_t nbytes;
{
- char *tmp = (char *) malloc (nbytes);
+ register PTR tmp = (PTR) really_call_malloc (nbytes);
if (!tmp)
{
- fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n", nbytes);
+ fprintf (stderr, "can't allocate %d bytes (out of virtual memory)\n",
+ nbytes);
exit (FATAL_EXIT_CODE);
}
return tmp;
}
-#endif /* USE_C_ALLOCA && !__GNUC__ */
+#endif /* USE_C_ALLOCA */
+
+/* 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)
+main (argc, argv)
int argc;
char **argv;
{
- FILE *f;
-
- if (argc != 3)
- exit (1);
-
find_formats ();
+ genlegend ();
- f = fopen (argv[1], "w");
- if (f == NULL)
- {
- perror(argv[1]);
- exit (1);
- }
- genlegend (f);
- genheader (f);
- fclose(f);
+ if (argc == 2 && argv[1][0] == '-' && argv[1][1] == 'h')
+ genheader ();
+ else
+ gencode ();
- f = fopen (argv[2], "w");
- if (f == NULL)
- {
- perror(argv[2]);
- exit (1);
- }
- genlegend (f);
- gencode (f);
- fclose(f);
+ if (ferror (stdout) || fflush (stdout) || fclose (stdout))
+ return FATAL_EXIT_CODE;
- exit (0);
+ return SUCCESS_EXIT_CODE;
}
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