Makefile.in: Update.

	* Makefile.in: Update.
	* c-common.c: Don't include real.h or except.h.
	(REGISTER_PREFIX): Remove.
	(builtin_define_std, builtin_define_with_value,
	builtin_define_with_int_value, builtin_define_with_hex_fp_value,
	builtin_define_type_max, builtin_define_type_precision,
	builtin_define_float_constants): Move to c-cppbuiltin.c.
	(c_stddef_cpp_builtins): New.
	* c-common.h (builtin_define_with_value, c_stddef_cpp_builtins): New.
	* c-cppbuiltin.c: New, extracted from c-common.c.
	(define__GNUC__): New.
	* cppspec.c (lang_specific_driver): Remove support of -no-gcc.
	* gcc.c: Remove support of %v1, %v2 and %v3 specs.
	(cpp_unique_options): Don't support no-gcc.
	(do_spec_1): Remove support of version specs.
	* doc/invoke.texi: Remove documentation of %v1, %v2 and %v3.
	* doc/passes.texi: Update.
	* doc/tm.texi: Update.
cp:
	* Make-lang.in (CXX_C_OBJS): Update.
	* lang-specs.h: Don't define __GNUG__ here.

From-SVN: r64162

1 files changed, 570 insertions, 0 deletions

diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c
new file mode 100644
index 0000000..adbefd0
--- /dev/null
+++ b/gcc/c-cppbuiltin.c
@@ -0,0 +1,570 @@
+/* Define builtin-in macros for the C family front ends.
+   Copyright (C) 2002, 2003 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 "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "flags.h"
+#include "real.h"
+#include "c-common.h"
+#include "c-pragma.h"
+#include "output.h"
+#include "except.h"		/* For USING_SJLJ_EXCEPTIONS.  */
+#include "toplev.h"
+
+#ifndef REGISTER_PREFIX
+#define REGISTER_PREFIX ""
+#endif
+
+static void builtin_define_std PARAMS ((const char *));
+static void builtin_define_with_value_n PARAMS ((const char *, const char *,
+						 size_t));
+static void builtin_define_with_int_value PARAMS ((const char *,
+						   HOST_WIDE_INT));
+static void builtin_define_with_hex_fp_value PARAMS ((const char *, tree,
+						      int, const char *,
+						      const char *));
+static void builtin_define_type_max PARAMS ((const char *, tree, int));
+static void builtin_define_type_precision PARAMS ((const char *, tree));
+static void builtin_define_float_constants PARAMS ((const char *,
+						    const char *, tree));
+static void define__GNUC__		PARAMS ((void));
+
+/* Define NAME with value TYPE precision.  */
+static void
+builtin_define_type_precision (name, type)
+     const char *name;
+     tree type;
+{
+  builtin_define_with_int_value (name, TYPE_PRECISION (type));
+}
+
+/* Define the float.h constants for TYPE using NAME_PREFIX and FP_SUFFIX.  */
+static void
+builtin_define_float_constants (name_prefix, fp_suffix, type)
+     const char *name_prefix;
+     const char *fp_suffix;
+     tree type;
+{
+  /* Used to convert radix-based values to base 10 values in several cases.
+
+     In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at
+     least 6 significant digits for correct results.  Using the fraction
+     formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an
+     intermediate; perhaps someone can find a better approximation, in the
+     mean time, I suspect using doubles won't harm the bootstrap here.  */
+
+  const double log10_2 = .30102999566398119521;
+  double log10_b;
+  const struct real_format *fmt;
+
+  char name[64], buf[128];
+  int dig, min_10_exp, max_10_exp;
+  int decimal_dig;
+
+  fmt = real_format_for_mode[TYPE_MODE (type) - QFmode];
+
+  /* The radix of the exponent representation.  */
+  if (type == float_type_node)
+    builtin_define_with_int_value ("__FLT_RADIX__", fmt->b);
+  log10_b = log10_2 * fmt->log2_b;
+
+  /* The number of radix digits, p, in the floating-point significand.  */
+  sprintf (name, "__%s_MANT_DIG__", name_prefix);
+  builtin_define_with_int_value (name, fmt->p);
+
+  /* The number of decimal digits, q, such that any floating-point number
+     with q decimal digits can be rounded into a floating-point number with
+     p radix b digits and back again without change to the q decimal digits,
+
+	p log10 b			if b is a power of 10
+ 	floor((p - 1) log10 b)		otherwise
+  */
+  dig = (fmt->p - 1) * log10_b;
+  sprintf (name, "__%s_DIG__", name_prefix);
+  builtin_define_with_int_value (name, dig);
+
+  /* The minimum negative int x such that b**(x-1) is a normalized float.  */
+  sprintf (name, "__%s_MIN_EXP__", name_prefix);
+  sprintf (buf, "(%d)", fmt->emin);
+  builtin_define_with_value (name, buf, 0);
+
+  /* The minimum negative int x such that 10**x is a normalized float,
+
+	  ceil (log10 (b ** (emin - 1)))
+	= ceil (log10 (b) * (emin - 1))
+
+     Recall that emin is negative, so the integer truncation calculates
+     the ceiling, not the floor, in this case.  */
+  min_10_exp = (fmt->emin - 1) * log10_b;
+  sprintf (name, "__%s_MIN_10_EXP__", name_prefix);
+  sprintf (buf, "(%d)", min_10_exp);
+  builtin_define_with_value (name, buf, 0);
+
+  /* The maximum int x such that b**(x-1) is a representable float.  */
+  sprintf (name, "__%s_MAX_EXP__", name_prefix);
+  builtin_define_with_int_value (name, fmt->emax);
+
+  /* The maximum int x such that 10**x is in the range of representable
+     finite floating-point numbers,
+
+	  floor (log10((1 - b**-p) * b**emax))
+	= floor (log10(1 - b**-p) + log10(b**emax))
+	= floor (log10(1 - b**-p) + log10(b)*emax)
+
+     The safest thing to do here is to just compute this number.  But since
+     we don't link cc1 with libm, we cannot.  We could implement log10 here
+     a series expansion, but that seems too much effort because:
+
+     Note that the first term, for all extant p, is a number exceedingly close
+     to zero, but slightly negative.  Note that the second term is an integer
+     scaling an irrational number, and that because of the floor we are only
+     interested in its integral portion.
+
+     In order for the first term to have any effect on the integral portion
+     of the second term, the second term has to be exceedingly close to an
+     integer itself (e.g. 123.000000000001 or something).  Getting a result
+     that close to an integer requires that the irrational multiplicand have
+     a long series of zeros in its expansion, which doesn't occur in the
+     first 20 digits or so of log10(b).
+
+     Hand-waving aside, crunching all of the sets of constants above by hand
+     does not yield a case for which the first term is significant, which
+     in the end is all that matters.  */
+  max_10_exp = fmt->emax * log10_b;
+  sprintf (name, "__%s_MAX_10_EXP__", name_prefix);
+  builtin_define_with_int_value (name, max_10_exp);
+
+  /* The number of decimal digits, n, such that any floating-point number
+     can be rounded to n decimal digits and back again without change to
+     the value. 
+
+	p * log10(b)			if b is a power of 10
+	ceil(1 + p * log10(b))		otherwise
+
+     The only macro we care about is this number for the widest supported
+     floating type, but we want this value for rendering constants below.  */
+  {
+    double d_decimal_dig = 1 + fmt->p * log10_b;
+    decimal_dig = d_decimal_dig;
+    if (decimal_dig < d_decimal_dig)
+      decimal_dig++;
+  }
+  if (type == long_double_type_node)
+    builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig);
+
+  /* Since, for the supported formats, B is always a power of 2, we
+     construct the following numbers directly as a hexadecimal
+     constants.  */
+
+  /* The maximum representable finite floating-point number,
+     (1 - b**-p) * b**emax  */
+  {
+    int i, n;
+    char *p;
+
+    strcpy (buf, "0x0.");
+    n = fmt->p * fmt->log2_b;
+    for (i = 0, p = buf + 4; i + 3 < n; i += 4)
+      *p++ = 'f';
+    if (i < n)
+      *p++ = "08ce"[n - i];
+    sprintf (p, "p%d", fmt->emax * fmt->log2_b);
+  }
+  sprintf (name, "__%s_MAX__", name_prefix);
+  builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix);
+
+  /* The minimum normalized positive floating-point number,
+     b**(emin-1).  */
+  sprintf (name, "__%s_MIN__", name_prefix);
+  sprintf (buf, "0x1p%d", (fmt->emin - 1) * fmt->log2_b);
+  builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix);
+
+  /* The difference between 1 and the least value greater than 1 that is
+     representable in the given floating point type, b**(1-p).  */
+  sprintf (name, "__%s_EPSILON__", name_prefix);
+  sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b);
+  builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix);
+
+  /* For C++ std::numeric_limits<T>::denorm_min.  The minimum denormalized
+     positive floating-point number, b**(emin-p).  Zero for formats that
+     don't support denormals.  */
+  sprintf (name, "__%s_DENORM_MIN__", name_prefix);
+  if (fmt->has_denorm)
+    {
+      sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b);
+      builtin_define_with_hex_fp_value (name, type, decimal_dig,
+					buf, fp_suffix);
+    }
+  else
+    {
+      sprintf (buf, "0.0%s", fp_suffix);
+      builtin_define_with_value (name, buf, 0);
+    }
+
+  /* For C++ std::numeric_limits<T>::has_infinity.  */
+  sprintf (name, "__%s_HAS_INFINITY__", name_prefix);
+  builtin_define_with_int_value (name, 
+				 MODE_HAS_INFINITIES (TYPE_MODE (type)));
+  /* For C++ std::numeric_limits<T>::has_quiet_NaN.  We do not have a
+     predicate to distinguish a target that has both quiet and
+     signalling NaNs from a target that has only quiet NaNs or only
+     signalling NaNs, so we assume that a target that has any kind of
+     NaN has quiet NaNs.  */
+  sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix);
+  builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type)));
+}
+
+/* Define __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__.  */
+static void
+define__GNUC__ ()
+{
+  /* The format of the version string, enforced below, is
+     ([^0-9]*-)?[0-9]+[.][0-9]+([.][0-9]+)?([- ].*)?  */
+  const char *q, *v = version_string;
+
+  while (*v && ! ISDIGIT (*v))
+    v++;
+  if (!*v || (v > version_string && v[-1] != '-'))
+    abort ();
+
+  q = v;
+  while (ISDIGIT (*v))
+    v++;
+  builtin_define_with_value_n ("__GNUC__", q, v - q);
+  if (c_language == clk_cplusplus)
+    builtin_define_with_value_n ("__GNUG__", q, v - q);
+
+  if (*v != '.' || !ISDIGIT (v[1]))
+    abort ();
+  q = ++v;
+  while (ISDIGIT (*v))
+    v++;
+  builtin_define_with_value_n ("__GNUC_MINOR__", q, v - q);
+
+  if (*v == '.')
+    {
+      if (!ISDIGIT (v[1]))
+	abort ();
+      q = ++v;
+      while (ISDIGIT (*v))
+	v++;
+      builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", q, v - q);
+    }
+  else
+    builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", "0", 1);
+
+  if (*v && *v != ' ' && *v != '-')
+    abort ();
+}
+
+/* Hook that registers front end and target-specific built-ins.  */
+void
+cb_register_builtins (pfile)
+     cpp_reader *pfile;
+{
+  /* -undef turns off target-specific built-ins.  */
+  if (flag_undef)
+    return;
+
+  define__GNUC__ ();
+
+  /* For stddef.h.  They require macros defined in c-common.c.  */
+  c_stddef_cpp_builtins ();
+
+  if (c_language == clk_cplusplus)
+    {
+      if (SUPPORTS_ONE_ONLY)
+	cpp_define (pfile, "__GXX_WEAK__=1");
+      else
+	cpp_define (pfile, "__GXX_WEAK__=0");
+      if (flag_exceptions)
+	cpp_define (pfile, "__EXCEPTIONS");
+      if (warn_deprecated)
+	cpp_define (pfile, "__DEPRECATED");
+    }
+
+  /* represents the C++ ABI version, always defined so it can be used while
+     preprocessing C and assembler.  */
+  cpp_define (pfile, "__GXX_ABI_VERSION=102");
+
+  /* libgcc needs to know this.  */
+  if (USING_SJLJ_EXCEPTIONS)
+    cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__");
+
+  /* limits.h needs to know these.  */
+  builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node, 0);
+  builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node, 0);
+  builtin_define_type_max ("__INT_MAX__", integer_type_node, 0);
+  builtin_define_type_max ("__LONG_MAX__", long_integer_type_node, 1);
+  builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node, 2);
+  builtin_define_type_max ("__WCHAR_MAX__", wchar_type_node, 0);
+
+  builtin_define_type_precision ("__CHAR_BIT__", char_type_node);
+
+  /* float.h needs to know these.  */
+
+  builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
+				 TARGET_FLT_EVAL_METHOD);
+
+  builtin_define_float_constants ("FLT", "F", float_type_node);
+  builtin_define_float_constants ("DBL", "", double_type_node);
+  builtin_define_float_constants ("LDBL", "L", long_double_type_node);
+
+  /* For use in assembly language.  */
+  builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
+  builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
+
+  /* Misc.  */
+  builtin_define_with_value ("__VERSION__", version_string, 1);
+
+  /* Other target-independent built-ins determined by command-line
+     options.  */
+  if (optimize_size)
+    cpp_define (pfile, "__OPTIMIZE_SIZE__");
+  if (optimize)
+    cpp_define (pfile, "__OPTIMIZE__");
+
+  if (flag_hosted)
+    cpp_define (pfile, "__STDC_HOSTED__=1");
+  else
+    cpp_define (pfile, "__STDC_HOSTED__=0");
+
+  if (fast_math_flags_set_p ())
+    cpp_define (pfile, "__FAST_MATH__");
+  if (flag_really_no_inline)
+    cpp_define (pfile, "__NO_INLINE__");
+  if (flag_signaling_nans)
+    cpp_define (pfile, "__SUPPORT_SNAN__");
+  if (flag_finite_math_only)
+    cpp_define (pfile, "__FINITE_MATH_ONLY__=1");
+  else
+    cpp_define (pfile, "__FINITE_MATH_ONLY__=0");
+
+  if (flag_iso)
+    cpp_define (pfile, "__STRICT_ANSI__");
+
+  if (!flag_signed_char)
+    cpp_define (pfile, "__CHAR_UNSIGNED__");
+
+  if (c_language == clk_cplusplus && TREE_UNSIGNED (wchar_type_node))
+    cpp_define (pfile, "__WCHAR_UNSIGNED__");
+
+  /* Make the choice of ObjC runtime visible to source code.  */
+  if (flag_objc && flag_next_runtime)
+    cpp_define (pfile, "__NEXT_RUNTIME__");
+
+  /* A straightforward target hook doesn't work, because of problems
+     linking that hook's body when part of non-C front ends.  */
+# define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
+# define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
+# define builtin_define(TXT) cpp_define (pfile, TXT)
+# define builtin_assert(TXT) cpp_assert (pfile, TXT)
+  TARGET_CPU_CPP_BUILTINS ();
+  TARGET_OS_CPP_BUILTINS ();
+}
+
+/* Pass an object-like macro.  If it doesn't lie in the user's
+   namespace, defines it unconditionally.  Otherwise define a version
+   with two leading underscores, and another version with two leading
+   and trailing underscores, and define the original only if an ISO
+   standard was not nominated.
+
+   e.g. passing "unix" defines "__unix", "__unix__" and possibly
+   "unix".  Passing "_mips" defines "__mips", "__mips__" and possibly
+   "_mips".  */
+static void
+builtin_define_std (macro)
+     const char *macro;
+{
+  size_t len = strlen (macro);
+  char *buff = alloca (len + 5);
+  char *p = buff + 2;
+  char *q = p + len;
+
+  /* prepend __ (or maybe just _) if in user's namespace.  */
+  memcpy (p, macro, len + 1);
+  if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1]))))
+    {
+      if (*p != '_')
+	*--p = '_';
+      if (p[1] != '_')
+	*--p = '_';
+    }
+  cpp_define (parse_in, p);
+
+  /* If it was in user's namespace...  */
+  if (p != buff + 2)
+    {
+      /* Define the macro with leading and following __.  */
+      if (q[-1] != '_')
+	*q++ = '_';
+      if (q[-2] != '_')
+	*q++ = '_';
+      *q = '\0';
+      cpp_define (parse_in, p);
+
+      /* Finally, define the original macro if permitted.  */
+      if (!flag_iso)
+	cpp_define (parse_in, macro);
+    }
+}
+
+/* Pass an object-like macro and a value to define it to.  The third
+   parameter says whether or not to turn the value into a string
+   constant.  */
+void
+builtin_define_with_value (macro, expansion, is_str)
+     const char *macro;
+     const char *expansion;
+     int is_str;
+{
+  char *buf;
+  size_t mlen = strlen (macro);
+  size_t elen = strlen (expansion);
+  size_t extra = 2;  /* space for an = and a NUL */
+
+  if (is_str)
+    extra += 2;  /* space for two quote marks */
+
+  buf = alloca (mlen + elen + extra);
+  if (is_str)
+    sprintf (buf, "%s=\"%s\"", macro, expansion);
+  else
+    sprintf (buf, "%s=%s", macro, expansion);
+
+  cpp_define (parse_in, buf);
+}
+
+/* Pass an object-like macro and a value to define it to.  The third
+   parameter is the length of the expansion.  */
+static void
+builtin_define_with_value_n (macro, expansion, elen)
+     const char *macro;
+     const char *expansion;
+     size_t elen;
+{
+  char *buf;
+  size_t mlen = strlen (macro);
+  
+  /* Space for an = and a NUL.  */
+  buf = alloca (mlen + elen + 2);
+  memcpy (buf, macro, mlen);
+  buf[mlen]= '=';
+  memcpy (buf + mlen + 1, expansion, elen);
+  buf[mlen + elen + 1] = '\0';
+
+  cpp_define (parse_in, buf);
+}
+
+/* Pass an object-like macro and an integer value to define it to.  */
+static void
+builtin_define_with_int_value (macro, value)
+     const char *macro;
+     HOST_WIDE_INT value;
+{
+  char *buf;
+  size_t mlen = strlen (macro);
+  size_t vlen = 18;
+  size_t extra = 2; /* space for = and NUL.  */
+
+  buf = alloca (mlen + vlen + extra);
+  memcpy (buf, macro, mlen);
+  buf[mlen] = '=';
+  sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value);
+
+  cpp_define (parse_in, buf);
+}
+
+/* Pass an object-like macro a hexadecimal floating-point value.  */
+static void
+builtin_define_with_hex_fp_value (macro, type, digits, hex_str, fp_suffix)
+     const char *macro;
+     tree type ATTRIBUTE_UNUSED;
+     int digits;
+     const char *hex_str;
+     const char *fp_suffix;
+{
+  REAL_VALUE_TYPE real;
+  char dec_str[64], buf[256];
+
+  /* Hex values are really cool and convenient, except that they're
+     not supported in strict ISO C90 mode.  First, the "p-" sequence
+     is not valid as part of a preprocessor number.  Second, we get a
+     pedwarn from the preprocessor, which has no context, so we can't
+     suppress the warning with __extension__.
+
+     So instead what we do is construct the number in hex (because 
+     it's easy to get the exact correct value), parse it as a real,
+     then print it back out as decimal.  */
+
+  real_from_string (&real, hex_str);
+  real_to_decimal (dec_str, &real, sizeof (dec_str), digits, 0);
+
+  sprintf (buf, "%s=%s%s", macro, dec_str, fp_suffix);
+  cpp_define (parse_in, buf);
+}
+
+/* Define MAX for TYPE based on the precision of the type.  IS_LONG is
+   1 for type "long" and 2 for "long long".  We have to handle
+   unsigned types, since wchar_t might be unsigned.  */
+
+static void
+builtin_define_type_max (macro, type, is_long)
+     const char *macro;
+     tree type;
+     int is_long;
+{
+  static const char *const values[]
+    = { "127", "255",
+	"32767", "65535",
+	"2147483647", "4294967295",
+	"9223372036854775807", "18446744073709551615",
+	"170141183460469231731687303715884105727",
+	"340282366920938463463374607431768211455" };
+  static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" };
+
+  const char *value, *suffix;
+  char *buf;
+  size_t idx;
+
+  /* Pre-rendering the values mean we don't have to futz with printing a
+     multi-word decimal value.  There are also a very limited number of
+     precisions that we support, so it's really a waste of time.  */
+  switch (TYPE_PRECISION (type))
+    {
+    case 8:	idx = 0; break;
+    case 16:	idx = 2; break;
+    case 32:	idx = 4; break;
+    case 64:	idx = 6; break;
+    case 128:	idx = 8; break;
+    default:    abort ();
+    }
+
+  value = values[idx + TREE_UNSIGNED (type)];
+  suffix = suffixes[is_long * 2 + TREE_UNSIGNED (type)];
+
+  buf = alloca (strlen (macro) + 1 + strlen (value) + strlen (suffix) + 1);
+  sprintf (buf, "%s=%s%s", macro, value, suffix);
+
+  cpp_define (parse_in, buf);
+}