/* Definitions of floating-point access for GNU compiler.
- Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998,
- 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999,
+ 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+ This file is part of GCC.
-GNU CC 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 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 3, or (at your option) any later
+ version.
-GNU CC 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.
+ 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
-#ifndef REAL_H_INCLUDED
-#define REAL_H_INCLUDED
+#ifndef GCC_REAL_H
+#define GCC_REAL_H
-/* Define codes for all the float formats that we know of. */
-#define UNKNOWN_FLOAT_FORMAT 0
-#define IEEE_FLOAT_FORMAT 1
-#define VAX_FLOAT_FORMAT 2
-#define IBM_FLOAT_FORMAT 3
-#define C4X_FLOAT_FORMAT 4
+#include "machmode.h"
-/* Default to IEEE float if not specified. Nearly all machines use it. */
+/* An expanded form of the represented number. */
-#ifndef TARGET_FLOAT_FORMAT
-#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-#endif
+/* Enumerate the special cases of numbers that we encounter. */
+enum real_value_class {
+ rvc_zero,
+ rvc_normal,
+ rvc_inf,
+ rvc_nan
+};
-#ifndef HOST_FLOAT_FORMAT
-#define HOST_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-#endif
+#define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG)
+#define EXP_BITS (32 - 6)
+#define MAX_EXP ((1 << (EXP_BITS - 1)) - 1)
+#define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG)
+#define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1))
+
+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. */
+ unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2;
+ unsigned int decimal : 1;
+ unsigned int sign : 1;
+ unsigned int signalling : 1;
+ unsigned int canonical : 1;
+ unsigned int uexp : EXP_BITS;
+ unsigned long sig[SIGSZ];
+};
-#if TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT
-#define REAL_INFINITY
-#endif
+#define REAL_EXP(REAL) \
+ ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \
+ - (1 << (EXP_BITS - 1)))
+#define SET_REAL_EXP(REAL, EXP) \
+ ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1)))
-/* If FLOAT_WORDS_BIG_ENDIAN and HOST_FLOAT_WORDS_BIG_ENDIAN are not defined
- in the header files, then this implies the word-endianness is the same as
- for integers. */
+/* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it
+ needs to be a macro. We do need to continue to have a structure tag
+ so that other headers can forward declare it. */
+#define REAL_VALUE_TYPE struct real_value
-/* This is defined 0 or 1, like WORDS_BIG_ENDIAN. */
-#ifndef FLOAT_WORDS_BIG_ENDIAN
-#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
-#endif
+/* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in
+ consecutive "w" slots. Moreover, we've got to compute the number of "w"
+ slots at preprocessor time, which means we can't use sizeof. Guess. */
-/* This is defined 0 or 1, unlike HOST_WORDS_BIG_ENDIAN. */
-#ifndef HOST_FLOAT_WORDS_BIG_ENDIAN
-#ifdef HOST_WORDS_BIG_ENDIAN
-#define HOST_FLOAT_WORDS_BIG_ENDIAN 1
-#else
-#define HOST_FLOAT_WORDS_BIG_ENDIAN 0
-#endif
-#endif
+#define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32)
+#define REAL_WIDTH \
+ (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \
+ + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */
-/* Defining REAL_ARITHMETIC invokes a floating point emulator
- that can produce a target machine format differing by more
- than just endian-ness from the host's format. The emulator
- is also used to support extended real XFmode. */
-#ifndef LONG_DOUBLE_TYPE_SIZE
-#define LONG_DOUBLE_TYPE_SIZE 64
-#endif
-/* MAX_LONG_DOUBLE_TYPE_SIZE is a constant tested by #if.
- LONG_DOUBLE_TYPE_SIZE can vary at compiler run time.
- So long as macros like REAL_VALUE_TO_TARGET_LONG_DOUBLE cannot
- vary too, however, then XFmode and TFmode long double
- cannot both be supported at the same time. */
-#ifndef MAX_LONG_DOUBLE_TYPE_SIZE
-#define MAX_LONG_DOUBLE_TYPE_SIZE LONG_DOUBLE_TYPE_SIZE
-#endif
-#if (MAX_LONG_DOUBLE_TYPE_SIZE == 96) || (MAX_LONG_DOUBLE_TYPE_SIZE == 128)
-#ifndef REAL_ARITHMETIC
-#define REAL_ARITHMETIC
-#endif
-#endif
-#ifdef REAL_ARITHMETIC
-/* **** Start of software floating point emulator interface macros **** */
-
-/* Support 80-bit extended real XFmode if LONG_DOUBLE_TYPE_SIZE
- has been defined to be 96 in the tm.h machine file. */
-#if (MAX_LONG_DOUBLE_TYPE_SIZE == 96)
-#define REAL_IS_NOT_DOUBLE
-#define REAL_ARITHMETIC
-typedef struct {
- HOST_WIDE_INT r[(11 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))];
-} realvaluetype;
-#define REAL_VALUE_TYPE realvaluetype
-
-#else /* no XFmode support */
-
-#if (MAX_LONG_DOUBLE_TYPE_SIZE == 128)
-
-#define REAL_IS_NOT_DOUBLE
-#define REAL_ARITHMETIC
-typedef struct {
- HOST_WIDE_INT r[(19 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))];
-} realvaluetype;
-#define REAL_VALUE_TYPE realvaluetype
-
-#else /* not TFmode */
-
-#if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
-/* If no XFmode support, then a REAL_VALUE_TYPE is 64 bits wide
- but it is not necessarily a host machine double. */
-#define REAL_IS_NOT_DOUBLE
-typedef struct {
- HOST_WIDE_INT r[(7 + sizeof (HOST_WIDE_INT))/(sizeof (HOST_WIDE_INT))];
-} realvaluetype;
-#define REAL_VALUE_TYPE realvaluetype
+/* Verify the guess. */
+extern char test_real_width
+ [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1];
+
+/* Calculate the format for CONST_DOUBLE. We need as many slots as
+ are necessary to overlay a REAL_VALUE_TYPE on them. This could be
+ as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE).
+
+ 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. */
+
+#if REAL_WIDTH == 1
+# define CONST_DOUBLE_FORMAT "ww"
#else
-/* If host and target formats are compatible, then a REAL_VALUE_TYPE
- is actually a host machine double. */
-#define REAL_VALUE_TYPE double
-#endif
+# if REAL_WIDTH == 2
+# define CONST_DOUBLE_FORMAT "ww"
+# else
+# if REAL_WIDTH == 3
+# define CONST_DOUBLE_FORMAT "www"
+# else
+# if REAL_WIDTH == 4
+# define CONST_DOUBLE_FORMAT "wwww"
+# else
+# if REAL_WIDTH == 5
+# define CONST_DOUBLE_FORMAT "wwwww"
+# else
+# if REAL_WIDTH == 6
+# define CONST_DOUBLE_FORMAT "wwwwww"
+# else
+ #error "REAL_WIDTH > 6 not supported"
+# endif
+# endif
+# endif
+# endif
+# endif
+#endif
+
+
+/* Describes the properties of the specific target format in use. */
+struct real_format
+{
+ /* Move to and from the target bytes. */
+ void (*encode) (const struct real_format *, long *,
+ const REAL_VALUE_TYPE *);
+ void (*decode) (const struct real_format *, REAL_VALUE_TYPE *,
+ const long *);
+
+ /* The radix of the exponent and digits of the significand. */
+ int b;
+
+ /* Size of the significand in digits of radix B. */
+ int p;
+
+ /* Size of the significant of a NaN, in digits of radix B. */
+ int pnan;
+
+ /* The minimum negative integer, x, such that b**(x-1) is normalized. */
+ int emin;
+
+ /* The maximum integer, x, such that b**(x-1) is representable. */
+ int emax;
+
+ /* The bit position of the sign bit, for determining whether a value
+ is positive/negative, or -1 for a complex encoding. */
+ int signbit_ro;
+
+ /* The bit position of the sign bit, for changing the sign of a number,
+ 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;
+};
+
+
+/* The target format used for each floating point mode.
+ Float modes are followed by decimal float modes, with entries for
+ float modes indexed by (MODE - first float mode), and entries for
+ decimal float modes indexed by (MODE - first decimal float mode) +
+ the number of float modes. */
+extern const struct real_format *
+ real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1
+ + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1];
+
+#define REAL_MODE_FORMAT(MODE) \
+ (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \
+ ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \
+ + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \
+ : ((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 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. */
+
+/* Binary or unary arithmetic on tree_code. */
+extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *);
+
+/* Compare reals by tree_code. */
+extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+
+/* Determine whether a floating-point value X is infinite. */
+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 *);
+
+/* Determine whether a floating-point value X is minus zero. */
+extern bool real_isnegzero (const REAL_VALUE_TYPE *);
+
+/* Compare two floating-point objects for bitwise identity. */
+extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+
+/* Extend or truncate to a new mode. */
+extern void real_convert (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+
+/* Return true if truncating to NEW is exact. */
+extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *);
+
+/* Render R as a decimal floating point constant. */
+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);
+
+/* Render R as an integer. */
+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. 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);
+
+/* Initialize R from an integer pair HIGH/LOW. */
+extern void real_from_integer (REAL_VALUE_TYPE *, enum machine_mode,
+ unsigned HOST_WIDE_INT, HOST_WIDE_INT, int);
+
+extern long real_to_target_fmt (long *, const REAL_VALUE_TYPE *,
+ const struct real_format *);
+extern long real_to_target (long *, const REAL_VALUE_TYPE *, enum machine_mode);
+
+extern void real_from_target_fmt (REAL_VALUE_TYPE *, const long *,
+ const struct real_format *);
+extern void real_from_target (REAL_VALUE_TYPE *, const long *,
+ enum machine_mode);
+
+extern void real_inf (REAL_VALUE_TYPE *);
+
+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, enum machine_mode);
+
+extern unsigned int real_hash (const REAL_VALUE_TYPE *);
+
-#endif /* no TFmode support */
-#endif /* no XFmode support */
+/* 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;
+extern const struct real_format ieee_extended_intel_128_format;
+extern const struct real_format ibm_extended_format;
+extern const struct real_format mips_extended_format;
+extern const struct real_format ieee_quad_format;
+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 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;
-extern unsigned int significand_size PARAMS ((enum machine_mode));
-/* If emulation has been enabled by defining REAL_ARITHMETIC or by
- setting LONG_DOUBLE_TYPE_SIZE to 96 or 128, then define macros so that
- they invoke emulator functions. This will succeed only if the machine
- files have been updated to use these macros in place of any
- references to host machine `double' or `float' types. */
-#ifdef REAL_ARITHMETIC
-#undef REAL_ARITHMETIC
+/* ====================================================================== */
+/* Crap. */
+
#define REAL_ARITHMETIC(value, code, d1, d2) \
- earith (&(value), (code), &(d1), &(d2))
-
-/* Declare functions in real.c. */
-extern void earith PARAMS ((REAL_VALUE_TYPE *, int,
- REAL_VALUE_TYPE *, REAL_VALUE_TYPE *));
-extern REAL_VALUE_TYPE etrunci PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE etruncui PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_atof PARAMS ((const char *, enum machine_mode));
-extern REAL_VALUE_TYPE ereal_negate PARAMS ((REAL_VALUE_TYPE));
-extern HOST_WIDE_INT efixi PARAMS ((REAL_VALUE_TYPE));
-extern unsigned HOST_WIDE_INT efixui PARAMS ((REAL_VALUE_TYPE));
-extern void ereal_from_int PARAMS ((REAL_VALUE_TYPE *,
- HOST_WIDE_INT, HOST_WIDE_INT,
- enum machine_mode));
-extern void ereal_from_uint PARAMS ((REAL_VALUE_TYPE *,
- unsigned HOST_WIDE_INT,
- unsigned HOST_WIDE_INT,
- enum machine_mode));
-extern void ereal_to_int PARAMS ((HOST_WIDE_INT *, HOST_WIDE_INT *,
- REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_ldexp PARAMS ((REAL_VALUE_TYPE, int));
-
-extern void etartdouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern void etarldouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern void etardouble PARAMS ((REAL_VALUE_TYPE, long *));
-extern long etarsingle PARAMS ((REAL_VALUE_TYPE));
-extern void ereal_to_decimal PARAMS ((REAL_VALUE_TYPE, char *));
-extern int ereal_cmp PARAMS ((REAL_VALUE_TYPE, REAL_VALUE_TYPE));
-extern int ereal_isneg PARAMS ((REAL_VALUE_TYPE));
-extern REAL_VALUE_TYPE ereal_unto_float PARAMS ((long));
-extern REAL_VALUE_TYPE ereal_unto_double PARAMS ((long *));
-extern REAL_VALUE_TYPE ereal_from_float PARAMS ((HOST_WIDE_INT));
-extern REAL_VALUE_TYPE ereal_from_double PARAMS ((HOST_WIDE_INT *));
-
-#define REAL_VALUES_EQUAL(x, y) (ereal_cmp ((x), (y)) == 0)
-/* true if x < y : */
-#define REAL_VALUES_LESS(x, y) (ereal_cmp ((x), (y)) == -1)
-#define REAL_VALUE_LDEXP(x, n) ereal_ldexp (x, n)
-
-/* These return REAL_VALUE_TYPE: */
-#define REAL_VALUE_RNDZINT(x) (etrunci (x))
-#define REAL_VALUE_UNSIGNED_RNDZINT(x) (etruncui (x))
-extern REAL_VALUE_TYPE real_value_truncate PARAMS ((enum machine_mode,
- REAL_VALUE_TYPE));
-#define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x)
-
-/* These return HOST_WIDE_INT: */
-/* Convert a floating-point value to integer, rounding toward zero. */
-#define REAL_VALUE_FIX(x) (efixi (x))
-/* Convert a floating-point value to unsigned integer, rounding
- toward zero. */
-#define REAL_VALUE_UNSIGNED_FIX(x) (efixui (x))
-
-/* Convert ASCII string S to floating point in mode M.
- Decimal input uses ATOF. Hexadecimal uses HTOF. */
-#define REAL_VALUE_ATOF(s,m) ereal_atof(s,m)
-#define REAL_VALUE_HTOF(s,m) ereal_atof(s,m)
-
-#define REAL_VALUE_NEGATE ereal_negate
-
-#define REAL_VALUE_MINUS_ZERO(x) \
- ((ereal_cmp (x, dconst0) == 0) && (ereal_isneg (x) != 0 ))
-
-#define REAL_VALUE_TO_INT ereal_to_int
-
-/* Here the cast to HOST_WIDE_INT sign-extends arguments such as ~0. */
-#define REAL_VALUE_FROM_INT(d, lo, hi, mode) \
- ereal_from_int (&d, (HOST_WIDE_INT) (lo), (HOST_WIDE_INT) (hi), mode)
-
-#define REAL_VALUE_FROM_UNSIGNED_INT(d, lo, hi, mode) \
- ereal_from_uint (&d, lo, hi, mode)
-
-/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
-#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \
- (LONG_DOUBLE_TYPE_SIZE == 64 ? etardouble ((IN), (OUT)) \
- : LONG_DOUBLE_TYPE_SIZE == 96 ? etarldouble ((IN), (OUT)) \
- : LONG_DOUBLE_TYPE_SIZE == 128 ? etartdouble ((IN), (OUT)) \
- : abort())
-#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) (etardouble ((IN), (OUT)))
-
-/* IN is a REAL_VALUE_TYPE. OUT is a long. */
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN)))
-
-/* Inverse of REAL_VALUE_TO_TARGET_DOUBLE. */
-#define REAL_VALUE_UNTO_TARGET_DOUBLE(d) (ereal_unto_double (d))
-
-/* Inverse of REAL_VALUE_TO_TARGET_SINGLE. */
-#define REAL_VALUE_UNTO_TARGET_SINGLE(f) (ereal_unto_float (f))
-
-/* d is an array of HOST_WIDE_INT that holds a double precision
- value in the target computer's floating point format. */
-#define REAL_VALUE_FROM_TARGET_DOUBLE(d) (ereal_from_double (d))
-
-/* f is a HOST_WIDE_INT containing a single precision target float value. */
-#define REAL_VALUE_FROM_TARGET_SINGLE(f) (ereal_from_float (f))
-
-/* Conversions to decimal ASCII string. */
-#define REAL_VALUE_TO_DECIMAL(r, fmt, s) (ereal_to_decimal (r, s))
-
-#endif /* REAL_ARITHMETIC defined */
+ real_arithmetic (&(value), code, &(d1), &(d2))
-/* **** End of software floating point emulator interface macros **** */
-#else /* No XFmode or TFmode and REAL_ARITHMETIC not defined */
-
-/* old interface */
-#ifdef REAL_ARITHMETIC
-/* Defining REAL_IS_NOT_DOUBLE breaks certain initializations
- when REAL_ARITHMETIC etc. are not defined. */
-
-/* Now see if the host and target machines use the same format.
- If not, define REAL_IS_NOT_DOUBLE (even if we end up representing
- reals as doubles because we have no better way in this cross compiler.)
- This turns off various optimizations that can happen when we know the
- compiler's float format matches the target's float format.
- */
-#if HOST_FLOAT_FORMAT != TARGET_FLOAT_FORMAT
-#define REAL_IS_NOT_DOUBLE
-#ifndef REAL_VALUE_TYPE
-typedef struct {
- HOST_WIDE_INT r[sizeof (double)/sizeof (HOST_WIDE_INT)];
- } realvaluetype;
-#define REAL_VALUE_TYPE realvaluetype
-#endif /* no REAL_VALUE_TYPE */
-#endif /* formats differ */
-#endif /* 0 */
-
-#endif /* emulator not used */
-
-/* If we are not cross-compiling, use a `double' to represent the
- floating-point value. Otherwise, use some other type
- (probably a struct containing an array of longs). */
-#ifndef REAL_VALUE_TYPE
-#define REAL_VALUE_TYPE double
-#else
-#define REAL_IS_NOT_DOUBLE
-#endif
+#define REAL_VALUES_IDENTICAL(x, y) real_identical (&(x), &(y))
+#define REAL_VALUES_EQUAL(x, y) real_compare (EQ_EXPR, &(x), &(y))
+#define REAL_VALUES_LESS(x, y) real_compare (LT_EXPR, &(x), &(y))
-#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
-
-/* Convert a type `double' value in host format first to a type `float'
- value in host format and then to a single type `long' value which
- is the bitwise equivalent of the `float' value. */
-#ifndef REAL_VALUE_TO_TARGET_SINGLE
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
-do { \
- union { \
- float f; \
- HOST_WIDE_INT l; \
- } u; \
- if (sizeof(HOST_WIDE_INT) < sizeof(float)) \
- abort(); \
- u.l = 0; \
- u.f = (IN); \
- (OUT) = u.l; \
-} while (0)
-#endif
+/* Determine whether a floating-point value X is infinite. */
+#define REAL_VALUE_ISINF(x) real_isinf (&(x))
-/* Convert a type `double' value in host format to a pair of type `long'
- values which is its bitwise equivalent, but put the two words into
- proper word order for the target. */
-#ifndef REAL_VALUE_TO_TARGET_DOUBLE
-#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
-do { \
- union { \
- REAL_VALUE_TYPE f; \
- HOST_WIDE_INT l[2]; \
- } u; \
- if (sizeof(HOST_WIDE_INT) * 2 < sizeof(REAL_VALUE_TYPE)) \
- abort(); \
- u.l[0] = u.l[1] = 0; \
- u.f = (IN); \
- if (HOST_FLOAT_WORDS_BIG_ENDIAN == FLOAT_WORDS_BIG_ENDIAN) \
- (OUT)[0] = u.l[0], (OUT)[1] = u.l[1]; \
- else \
- (OUT)[1] = u.l[0], (OUT)[0] = u.l[1]; \
-} while (0)
-#endif
-#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
+/* Determine whether a floating-point value X is a NaN. */
+#define REAL_VALUE_ISNAN(x) real_isnan (&(x))
-/* In this configuration, double and long double are the same. */
-#ifndef REAL_VALUE_TO_TARGET_LONG_DOUBLE
-#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(a, b) REAL_VALUE_TO_TARGET_DOUBLE (a, b)
-#endif
+/* Determine whether a floating-point value X is negative. */
+#define REAL_VALUE_NEGATIVE(x) real_isneg (&(x))
-/* Compare two floating-point objects for bitwise identity.
- This is not the same as comparing for equality on IEEE hosts:
- -0.0 equals 0.0 but they are not identical, and conversely
- two NaNs might be identical but they cannot be equal. */
-#define REAL_VALUES_IDENTICAL(x, y) \
- (!bcmp ((char *) &(x), (char *) &(y), sizeof (REAL_VALUE_TYPE)))
+/* Determine whether a floating-point value X is minus zero. */
+#define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x))
-/* Compare two floating-point values for equality. */
-#ifndef REAL_VALUES_EQUAL
-#define REAL_VALUES_EQUAL(x, y) ((x) == (y))
-#endif
+/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
+#define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \
+ real_to_target (OUT, &(IN), \
+ mode_for_size (LONG_DOUBLE_TYPE_SIZE, MODE_FLOAT, 0))
-/* Compare two floating-point values for less than. */
-#ifndef REAL_VALUES_LESS
-#define REAL_VALUES_LESS(x, y) ((x) < (y))
-#endif
+#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0))
-/* Truncate toward zero to an integer floating-point value. */
-#ifndef REAL_VALUE_RNDZINT
-#define REAL_VALUE_RNDZINT(x) ((double) ((int) (x)))
-#endif
+/* IN is a REAL_VALUE_TYPE. OUT is a long. */
+#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \
+ ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_FLOAT, 0)))
-/* Truncate toward zero to an unsigned integer floating-point value. */
-#ifndef REAL_VALUE_UNSIGNED_RNDZINT
-#define REAL_VALUE_UNSIGNED_RNDZINT(x) ((double) ((unsigned int) (x)))
-#endif
+#define REAL_VALUE_FROM_INT(r, lo, hi, mode) \
+ real_from_integer (&(r), mode, lo, hi, 0)
-/* Convert a floating-point value to integer, rounding toward zero. */
-#ifndef REAL_VALUE_FIX
-#define REAL_VALUE_FIX(x) ((int) (x))
-#endif
+#define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \
+ real_from_integer (&(r), mode, lo, hi, 1)
-/* Convert a floating-point value to unsigned integer, rounding
- toward zero. */
-#ifndef REAL_VALUE_UNSIGNED_FIX
-#define REAL_VALUE_UNSIGNED_FIX(x) ((unsigned int) (x))
-#endif
+/* Real values to IEEE 754 decimal floats. */
-/* Scale X by Y powers of 2. */
-#ifndef REAL_VALUE_LDEXP
-#define REAL_VALUE_LDEXP(x, y) ldexp (x, y)
-extern double ldexp PARAMS ((double, int));
-#endif
+/* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */
+#define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0))
-/* Convert the string X to a floating-point value. */
-#ifndef REAL_VALUE_ATOF
-#if 1
-/* Use real.c to convert decimal numbers to binary, ... */
-extern REAL_VALUE_TYPE ereal_atof PARAMS ((const char *, enum machine_mode));
-#define REAL_VALUE_ATOF(x, s) ereal_atof (x, s)
-/* Could use ereal_atof here for hexadecimal floats too, but real_hex_to_f
- is OK and it uses faster native fp arithmetic. */
-/* #define REAL_VALUE_HTOF(x, s) ereal_atof (x, s) */
-#else
-/* ... or, if you like the host computer's atof, go ahead and use it: */
-#define REAL_VALUE_ATOF(x, s) atof (x)
-#if defined (MIPSEL) || defined (MIPSEB)
-/* MIPS compiler can't handle parens around the function name.
- This problem *does not* appear to be connected with any
- macro definition for atof. It does not seem there is one. */
-extern double atof ();
-#else
-extern double (atof) ();
-#endif
-#endif
-#endif
+#define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0))
-/* Hexadecimal floating constant input for use with host computer's
- fp arithmetic. */
-#ifndef REAL_VALUE_HTOF
-extern REAL_VALUE_TYPE real_hex_to_f PARAMS ((char *, enum machine_mode));
-#define REAL_VALUE_HTOF(s,m) real_hex_to_f(s,m)
-#endif
+/* IN is a REAL_VALUE_TYPE. OUT is a long. */
+#define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \
+ ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0)))
-/* Negate the floating-point value X. */
-#ifndef REAL_VALUE_NEGATE
-#define REAL_VALUE_NEGATE(x) (- (x))
-#endif
+extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode,
+ REAL_VALUE_TYPE);
-/* Truncate the floating-point value X to mode MODE. This is correct only
- for the most common case where the host and target have objects of the same
- size and where `float' is SFmode. */
+#define REAL_VALUE_TO_INT(plow, phigh, r) \
+ real_to_integer2 (plow, phigh, &(r))
-/* Don't use REAL_VALUE_TRUNCATE directly--always call real_value_truncate. */
-extern REAL_VALUE_TYPE real_value_truncate PARAMS ((enum machine_mode,
- REAL_VALUE_TYPE));
+extern REAL_VALUE_TYPE real_value_negate (const REAL_VALUE_TYPE *);
+extern REAL_VALUE_TYPE real_value_abs (const REAL_VALUE_TYPE *);
-#ifndef REAL_VALUE_TRUNCATE
-#define REAL_VALUE_TRUNCATE(mode, x) \
- (GET_MODE_BITSIZE (mode) == sizeof (float) * HOST_BITS_PER_CHAR \
- ? (float) (x) : (x))
-#endif
+extern int significand_size (enum machine_mode);
-/* Determine whether a floating-point value X is infinite. */
-#ifndef REAL_VALUE_ISINF
-#define REAL_VALUE_ISINF(x) (target_isinf (x))
-#endif
+extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode);
-/* Determine whether a floating-point value X is a NaN. */
-#ifndef REAL_VALUE_ISNAN
-#define REAL_VALUE_ISNAN(x) (target_isnan (x))
-#endif
+#define REAL_VALUE_ATOF(s, m) \
+ real_from_string2 (s, m)
-/* Determine whether a floating-point value X is negative. */
-#ifndef REAL_VALUE_NEGATIVE
-#define REAL_VALUE_NEGATIVE(x) (target_negative (x))
-#endif
+#define CONST_DOUBLE_ATOF(s, m) \
+ CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m)
-extern int target_isnan PARAMS ((REAL_VALUE_TYPE));
-extern int target_isinf PARAMS ((REAL_VALUE_TYPE));
-extern int target_negative PARAMS ((REAL_VALUE_TYPE));
+#define REAL_VALUE_FIX(r) \
+ real_to_integer (&(r))
-/* Determine whether a floating-point value X is minus 0. */
-#ifndef REAL_VALUE_MINUS_ZERO
-#define REAL_VALUE_MINUS_ZERO(x) ((x) == 0 && REAL_VALUE_NEGATIVE (x))
-#endif
+/* ??? Not quite right. */
+#define REAL_VALUE_UNSIGNED_FIX(r) \
+ real_to_integer (&(r))
+
+/* ??? These were added for Paranoia support. */
+
+/* Return floor log2(R). */
+extern int real_exponent (const REAL_VALUE_TYPE *);
+
+/* R = A * 2**EXP. */
+extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int);
+
+/* **** End of software floating point emulator interface macros **** */
\f
-/* Constant real values 0, 1, 2, and -1. */
+/* 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 dconstm1;
+extern REAL_VALUE_TYPE dconsthalf;
-/* Union type used for extracting real values from CONST_DOUBLEs
- or putting them in. */
+#define dconst_e() (*dconst_e_ptr ())
+#define dconst_third() (*dconst_third_ptr ())
+#define dconst_sqrt2() (*dconst_sqrt2_ptr ())
-union real_extract
-{
- REAL_VALUE_TYPE d;
- HOST_WIDE_INT i[sizeof (REAL_VALUE_TYPE) / sizeof (HOST_WIDE_INT)];
-};
+/* Function to return the real value special constant 'e'. */
+extern const REAL_VALUE_TYPE * dconst_e_ptr (void);
-/* For a CONST_DOUBLE:
- The usual two ints that hold the value.
- For a DImode, that is all there are;
- and CONST_DOUBLE_LOW is the low-order word and ..._HIGH the high-order.
- For a float, the number of ints varies,
- and CONST_DOUBLE_LOW is the one that should come first *in memory*.
- So use &CONST_DOUBLE_LOW(r) as the address of an array of ints. */
-#define CONST_DOUBLE_LOW(r) XWINT (r, 2)
-#define CONST_DOUBLE_HIGH(r) XWINT (r, 3)
-
-/* Link for chain of all CONST_DOUBLEs in use in current function. */
-#define CONST_DOUBLE_CHAIN(r) X0EXP (r, 1)
-/* The MEM which represents this CONST_DOUBLE's value in memory,
- or const0_rtx if no MEM has been made for it yet,
- or cc0_rtx if it is not on the chain. */
-#define CONST_DOUBLE_MEM(r) XEXP (r, 0)
+/* 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);
-/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
/* Function to return a real value (not a tree node)
from a given integer constant. */
-union tree_node;
-REAL_VALUE_TYPE real_value_from_int_cst PARAMS ((union tree_node *,
- union tree_node *));
+REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree);
-#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
-do { union real_extract u; \
- bcopy ((char *) &CONST_DOUBLE_LOW ((from)), (char *) &u, sizeof u); \
- to = u.d; } while (0)
+/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
+#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
+ ((to) = *CONST_DOUBLE_REAL_VALUE (from))
/* Return a CONST_DOUBLE with value R and mode M. */
-
-#define CONST_DOUBLE_FROM_REAL_VALUE(r, m) immed_real_const_1 (r, m)
-extern struct rtx_def *immed_real_const_1 PARAMS ((REAL_VALUE_TYPE,
- enum machine_mode));
-
-
-/* Convert a floating point value `r', that can be interpreted
- as a host machine float or double, to a decimal ASCII string `s'
- using printf format string `fmt'. */
-#ifndef REAL_VALUE_TO_DECIMAL
-#define REAL_VALUE_TO_DECIMAL(r, fmt, s) (sprintf (s, fmt, r))
-#endif
+#define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \
+ const_double_from_real_value (r, m)
+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 int exact_real_inverse PARAMS ((enum machine_mode, REAL_VALUE_TYPE *));
-extern int target_isnan PARAMS ((REAL_VALUE_TYPE));
-extern int target_isinf PARAMS ((REAL_VALUE_TYPE));
-extern int target_negative PARAMS ((REAL_VALUE_TYPE));
-extern void debug_real PARAMS ((REAL_VALUE_TYPE));
-
-/* In varasm.c */
-extern void assemble_real PARAMS ((REAL_VALUE_TYPE,
- enum machine_mode));
-extern void debug_real PARAMS ((REAL_VALUE_TYPE));
-
-/* In varasm.c */
-extern void assemble_real PARAMS ((REAL_VALUE_TYPE,
- enum machine_mode));
-#endif /* Not REAL_H_INCLUDED */
+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);
+
+/* Calculate R as the square root of X in the given machine mode. */
+extern bool real_sqrt (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+
+/* Calculate R as X raised to the integer exponent N in mode MODE. */
+extern bool real_powi (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *, HOST_WIDE_INT);
+
+/* Standard round to integer value functions. */
+extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+extern void real_round (REAL_VALUE_TYPE *, enum machine_mode,
+ const REAL_VALUE_TYPE *);
+
+/* Set the sign of R to the sign of X. */
+extern void real_copysign (REAL_VALUE_TYPE *, 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 */
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