X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Freal.h;h=d16dc249de90d5f1a1ca7e83a40aa123a41d9ab7;hb=56adb3e07395775f28297364632248fa1883466f;hp=4198b02aee6e3bdf86f1c2de7e7bab575b1c0a46;hpb=0570334c0707d5ac88a64e10c65f1c1beac3d38f;p=pf3gnuchains%2Fgcc-fork.git
diff --git a/gcc/real.h b/gcc/real.h
index 4198b02aee6..d16dc249de9 100644
--- a/gcc/real.h
+++ b/gcc/real.h
@@ -1,12 +1,13 @@
/* Definitions of floating-point access for GNU compiler.
Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999,
- 2000, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ 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
+ Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
@@ -15,15 +16,12 @@
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, 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with GCC; see the file COPYING3. If not see
+ . */
#ifndef GCC_REAL_H
#define GCC_REAL_H
-#include
-#include
#include "machmode.h"
/* An expanded form of the represented number. */
@@ -42,8 +40,7 @@ enum real_value_class {
#define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG)
#define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1))
-struct real_value GTY(())
-{
+struct GTY(()) real_value {
/* Use the same underlying type for all bit-fields, so as to make
sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will
be miscomputed. */
@@ -126,9 +123,6 @@ struct real_format
/* The radix of the exponent and digits of the significand. */
int b;
- /* log2(b). */
- int log2_b;
-
/* Size of the significand in digits of radix B. */
int p;
@@ -149,12 +143,17 @@ struct real_format
or -1 for a complex encoding. */
int signbit_rw;
+ /* Default rounding mode for operations on this format. */
+ bool round_towards_zero;
+ bool has_sign_dependent_rounding;
+
/* Properties of the format. */
bool has_nans;
bool has_inf;
bool has_denorm;
bool has_signed_zero;
bool qnan_msb_set;
+ bool canonical_nan_lsbs_set;
};
@@ -169,15 +168,57 @@ extern const struct real_format *
#define REAL_MODE_FORMAT(MODE) \
(real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \
- ? ((MODE - MIN_MODE_DECIMAL_FLOAT) \
+ ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \
+ (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \
- : (MODE - MIN_MODE_FLOAT)])
+ : ((MODE) - MIN_MODE_FLOAT)])
+
+#define FLOAT_MODE_FORMAT(MODE) \
+ (REAL_MODE_FORMAT (SCALAR_FLOAT_MODE_P (MODE)? (MODE) \
+ : GET_MODE_INNER (MODE)))
/* The following macro determines whether the floating point format is
composite, i.e. may contain non-consecutive mantissa bits, in which
case compile-time FP overflow may not model run-time overflow. */
-#define REAL_MODE_FORMAT_COMPOSITE_P(MODE) \
- ((REAL_MODE_FORMAT(MODE))->pnan < (REAL_MODE_FORMAT (MODE))->p)
+#define MODE_COMPOSITE_P(MODE) \
+ (FLOAT_MODE_P (MODE) \
+ && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p)
+
+/* Accessor macros for format properties. */
+#define MODE_HAS_NANS(MODE) \
+ (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans)
+#define MODE_HAS_INFINITIES(MODE) \
+ (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf)
+#define MODE_HAS_SIGNED_ZEROS(MODE) \
+ (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero)
+#define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \
+ (FLOAT_MODE_P (MODE) \
+ && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding)
+
+/* True if the given mode has a NaN representation and the treatment of
+ NaN operands is important. Certain optimizations, such as folding
+ x * 0 into 0, are not correct for NaN operands, and are normally
+ disabled for modes with NaNs. The user can ask for them to be
+ done anyway using the -funsafe-math-optimizations switch. */
+#define HONOR_NANS(MODE) \
+ (MODE_HAS_NANS (MODE) && !flag_finite_math_only)
+
+/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */
+#define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE))
+
+/* As for HONOR_NANS, but true if the mode can represent infinity and
+ the treatment of infinite values is important. */
+#define HONOR_INFINITIES(MODE) \
+ (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only)
+
+/* Like HONOR_NANS, but true if the given mode distinguishes between
+ positive and negative zero, and the sign of zero is important. */
+#define HONOR_SIGNED_ZEROS(MODE) \
+ (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros)
+
+/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding,
+ and the rounding mode is important. */
+#define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \
+ (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math)
/* Declare functions in real.c. */
@@ -194,6 +235,9 @@ extern bool real_isinf (const REAL_VALUE_TYPE *);
/* Determine whether a floating-point value X is a NaN. */
extern bool real_isnan (const REAL_VALUE_TYPE *);
+/* Determine whether a floating-point value X is finite. */
+extern bool real_isfinite (const REAL_VALUE_TYPE *);
+
/* Determine whether a floating-point value X is negative. */
extern bool real_isneg (const REAL_VALUE_TYPE *);
@@ -214,6 +258,11 @@ extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *);
extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t,
size_t, int);
+/* Render R as a decimal floating point constant, rounded so as to be
+ parsed back to the same value when interpreted in mode MODE. */
+extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t,
+ size_t, int, enum machine_mode);
+
/* Render R as a hexadecimal floating point constant. */
extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *,
size_t, size_t, int);
@@ -223,8 +272,9 @@ extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *);
extern void real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *,
const REAL_VALUE_TYPE *);
-/* Initialize R from a decimal or hexadecimal string. */
-extern void real_from_string (REAL_VALUE_TYPE *, const char *);
+/* Initialize R from a decimal or hexadecimal string. Return -1 if
+ the value underflows, +1 if overflows, and 0 otherwise. */
+extern int real_from_string (REAL_VALUE_TYPE *, const char *);
/* Wrapper to allow different internal representation for decimal floats. */
extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, enum machine_mode);
@@ -247,7 +297,7 @@ extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode);
extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode);
-extern void real_2expN (REAL_VALUE_TYPE *, int);
+extern void real_2expN (REAL_VALUE_TYPE *, int, enum machine_mode);
extern unsigned int real_hash (const REAL_VALUE_TYPE *);
@@ -255,8 +305,11 @@ extern unsigned int real_hash (const REAL_VALUE_TYPE *);
/* Target formats defined in real.c. */
extern const struct real_format ieee_single_format;
extern const struct real_format mips_single_format;
+extern const struct real_format motorola_single_format;
+extern const struct real_format spu_single_format;
extern const struct real_format ieee_double_format;
extern const struct real_format mips_double_format;
+extern const struct real_format motorola_double_format;
extern const struct real_format ieee_extended_motorola_format;
extern const struct real_format ieee_extended_intel_96_format;
extern const struct real_format ieee_extended_intel_96_round_53_format;
@@ -268,14 +321,12 @@ extern const struct real_format mips_quad_format;
extern const struct real_format vax_f_format;
extern const struct real_format vax_d_format;
extern const struct real_format vax_g_format;
-extern const struct real_format i370_single_format;
-extern const struct real_format i370_double_format;
-extern const struct real_format c4x_single_format;
-extern const struct real_format c4x_extended_format;
extern const struct real_format real_internal_format;
extern const struct real_format decimal_single_format;
extern const struct real_format decimal_double_format;
extern const struct real_format decimal_quad_format;
+extern const struct real_format ieee_half_format;
+extern const struct real_format arm_half_format;
/* ====================================================================== */
@@ -318,7 +369,7 @@ extern const struct real_format decimal_quad_format;
#define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \
real_from_integer (&(r), mode, lo, hi, 1)
-/* Real values to IEEE 754R decimal floats. */
+/* Real values to IEEE 754 decimal floats. */
/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
#define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \
@@ -337,14 +388,8 @@ extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode,
#define REAL_VALUE_TO_INT(plow, phigh, r) \
real_to_integer2 (plow, phigh, &(r))
-extern REAL_VALUE_TYPE real_arithmetic2 (int, const REAL_VALUE_TYPE *,
- const REAL_VALUE_TYPE *);
-
-#define REAL_VALUE_NEGATE(X) \
- real_arithmetic2 (NEGATE_EXPR, &(X), NULL)
-
-#define REAL_VALUE_ABS(X) \
- real_arithmetic2 (ABS_EXPR, &(X), NULL)
+extern REAL_VALUE_TYPE real_value_negate (const REAL_VALUE_TYPE *);
+extern REAL_VALUE_TYPE real_value_abs (const REAL_VALUE_TYPE *);
extern int significand_size (enum machine_mode);
@@ -373,23 +418,30 @@ extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int);
/* **** End of software floating point emulator interface macros **** */
-/* Constant real values 0, 1, 2, 3, 10, -1, -2, 0.5 and 1/3. */
+/* Constant real values 0, 1, 2, -1 and 0.5. */
extern REAL_VALUE_TYPE dconst0;
extern REAL_VALUE_TYPE dconst1;
extern REAL_VALUE_TYPE dconst2;
-extern REAL_VALUE_TYPE dconst3;
-extern REAL_VALUE_TYPE dconst10;
extern REAL_VALUE_TYPE dconstm1;
-extern REAL_VALUE_TYPE dconstm2;
extern REAL_VALUE_TYPE dconsthalf;
-extern REAL_VALUE_TYPE dconstthird;
-extern REAL_VALUE_TYPE dconstpi;
-extern REAL_VALUE_TYPE dconste;
+
+#define dconst_e() (*dconst_e_ptr ())
+#define dconst_third() (*dconst_third_ptr ())
+#define dconst_sqrt2() (*dconst_sqrt2_ptr ())
+
+/* Function to return the real value special constant 'e'. */
+extern const REAL_VALUE_TYPE * dconst_e_ptr (void);
+
+/* Returns the special REAL_VALUE_TYPE corresponding to 1/3. */
+extern const REAL_VALUE_TYPE * dconst_third_ptr (void);
+
+/* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */
+extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void);
/* Function to return a real value (not a tree node)
from a given integer constant. */
-REAL_VALUE_TYPE real_value_from_int_cst (tree, tree);
+REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree);
/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
@@ -403,6 +455,11 @@ extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode);
/* Replace R by 1/R in the given machine mode, if the result is exact. */
extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *);
+/* Return true if arithmetic on values in IMODE that were promoted
+ from values in TMODE is equivalent to direct arithmetic on values
+ in TMODE. */
+bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode);
+
/* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */
extern tree build_real (tree, REAL_VALUE_TYPE);
@@ -427,13 +484,11 @@ extern void real_round (REAL_VALUE_TYPE *, enum machine_mode,
/* Set the sign of R to the sign of X. */
extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
-/* Convert between MPFR and REAL_VALUE_TYPE. The caller is
- responsible for initializing and clearing the MPFR parameter. */
-
-extern void real_from_mpfr (REAL_VALUE_TYPE *, mpfr_srcptr);
-extern void mpfr_from_real (mpfr_ptr, const REAL_VALUE_TYPE *);
-
/* Check whether the real constant value given is an integer. */
extern bool real_isinteger (const REAL_VALUE_TYPE *c, enum machine_mode mode);
+/* Write into BUF the maximum representable finite floating-point
+ number, (1 - b**-p) * b**emax for a given FP format FMT as a hex
+ float string. BUF must be large enough to contain the result. */
+extern void get_max_float (const struct real_format *, char *, size_t);
#endif /* ! GCC_REAL_H */