/* Definitions of floating-point access for GNU compiler.
- Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998,
- 1999, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999,
+ 2000, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
-This file is part of GCC.
+ 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 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.
-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.
+ 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. */
+ 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 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
-
-/* Default to IEEE float if not specified. Nearly all machines use it. */
-
-#ifndef TARGET_FLOAT_FORMAT
-#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-#endif
-
-#ifndef HOST_FLOAT_FORMAT
-#define HOST_FLOAT_FORMAT IEEE_FLOAT_FORMAT
-#endif
-
-#ifndef INTEL_EXTENDED_IEEE_FORMAT
-#define INTEL_EXTENDED_IEEE_FORMAT 0
-#endif
-
-/* 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. */
-
-/* This is defined 0 or 1, like WORDS_BIG_ENDIAN. */
-#ifndef FLOAT_WORDS_BIG_ENDIAN
-#define FLOAT_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
-#endif
-
-/* 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
-
-#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
-
-/* **** Start of software floating point emulator interface macros **** */
-
-/* REAL_VALUE_TYPE is an array of the minimum number of HOST_WIDE_INTs
- required to hold either a 96- or 160-bit extended precision floating
- point type. This is true even if the maximum precision floating
- point type on the target is smaller. */
-#if MAX_LONG_DOUBLE_TYPE_SIZE == 128 && !INTEL_EXTENDED_IEEE_FORMAT
-#define REAL_VALUE_TYPE_SIZE 160
-#else
-#define REAL_VALUE_TYPE_SIZE 96
-#endif
+#include <gmp.h>
+#include <mpfr.h>
+#include "machmode.h"
+
+/* An expanded form of the represented number. */
+
+/* Enumerate the special cases of numbers that we encounter. */
+enum real_value_class {
+ rvc_zero,
+ rvc_normal,
+ rvc_inf,
+ rvc_nan
+};
+
+#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 real_value GTY(())
+{
+ /* 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];
+};
+
+#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)))
+
+/* 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
+
+/* 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. */
+
+#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 */
-typedef struct {
- HOST_WIDE_INT r[REAL_WIDTH];
-} REAL_VALUE_TYPE;
+
+/* 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 five (32-bit HOST_WIDE_INT, 160-bit REAL_VALUE_TYPE).
+ 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 "0ww"
+# define CONST_DOUBLE_FORMAT "ww"
#else
# if REAL_WIDTH == 2
-# define CONST_DOUBLE_FORMAT "0ww"
+# define CONST_DOUBLE_FORMAT "ww"
# else
# if REAL_WIDTH == 3
-# define CONST_DOUBLE_FORMAT "0www"
+# define CONST_DOUBLE_FORMAT "www"
# else
# if REAL_WIDTH == 4
-# define CONST_DOUBLE_FORMAT "0wwww"
+# define CONST_DOUBLE_FORMAT "wwww"
# else
# if REAL_WIDTH == 5
-# define CONST_DOUBLE_FORMAT "0wwwww"
+# define CONST_DOUBLE_FORMAT "wwwww"
# else
- #error "REAL_WIDTH > 5 not supported"
+# if REAL_WIDTH == 6
+# define CONST_DOUBLE_FORMAT "wwwwww"
+# else
+ #error "REAL_WIDTH > 6 not supported"
+# endif
# endif
# endif
# endif
# endif
#endif
-extern unsigned int significand_size PARAMS ((enum machine_mode));
-#define REAL_ARITHMETIC(value, code, d1, d2) \
- earith (&(value), (code), &(d1), &(d2))
+/* 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;
+
+ /* 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)])
+
+/* 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)
/* 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_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)
-
-/* 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) \
- (!memcmp ((char *) &(x), (char *) &(y), sizeof (REAL_VALUE_TYPE)))
-
-/* These return REAL_VALUE_TYPE: */
-#define REAL_VALUE_RNDZINT(x) (etrunci (x))
-#define REAL_VALUE_UNSIGNED_RNDZINT(x) (etruncui (x))
-
-/* Truncate the floating-point value X to mode MODE. */
-#define REAL_VALUE_TRUNCATE(mode, x) real_value_truncate (mode, x)
-extern REAL_VALUE_TYPE real_value_truncate PARAMS ((enum machine_mode,
- REAL_VALUE_TYPE));
-
-/* 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
-
-/* Compute the absolute value of a floating-point value X. */
-#define REAL_VALUE_ABS(x) \
- (REAL_VALUE_NEGATIVE (x) ? REAL_VALUE_NEGATE (x) : (x))
+
+/* 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 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 *);
+
+
+/* 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 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;
+
+
+/* ====================================================================== */
+/* Crap. */
+
+#define REAL_ARITHMETIC(value, code, d1, d2) \
+ real_arithmetic (&(value), code, &(d1), &(d2))
+
+#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))
/* Determine whether a floating-point value X is infinite. */
-#define REAL_VALUE_ISINF(x) (target_isinf (x))
+#define REAL_VALUE_ISINF(x) real_isinf (&(x))
/* Determine whether a floating-point value X is a NaN. */
-#define REAL_VALUE_ISNAN(x) (target_isnan (x))
+#define REAL_VALUE_ISNAN(x) real_isnan (&(x))
/* Determine whether a floating-point value X is negative. */
-#define REAL_VALUE_NEGATIVE(x) (target_negative (x))
+#define REAL_VALUE_NEGATIVE(x) real_isneg (&(x))
/* Determine whether a floating-point value X is minus zero. */
-#define REAL_VALUE_MINUS_ZERO(x) \
- ((ereal_cmp (x, dconst0) == 0) && (ereal_isneg (x) != 0 ))
+#define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x))
+
+/* 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))
+
+#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0))
-#define REAL_VALUE_TO_INT ereal_to_int
+/* 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)))
-/* 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_INT(r, lo, hi, mode) \
+ real_from_integer (&(r), mode, lo, hi, 0)
-#define REAL_VALUE_FROM_UNSIGNED_INT(d, lo, hi, mode) \
- ereal_from_uint (&d, lo, hi, mode)
+#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. */
/* 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)))
+#define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0))
+
+#define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \
+ real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0))
/* IN is a REAL_VALUE_TYPE. OUT is a long. */
-#define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) ((OUT) = etarsingle ((IN)))
+#define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \
+ ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0)))
-/* Inverse of REAL_VALUE_TO_TARGET_DOUBLE. */
-#define REAL_VALUE_UNTO_TARGET_DOUBLE(d) (ereal_unto_double (d))
+extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode,
+ REAL_VALUE_TYPE);
-/* Inverse of REAL_VALUE_TO_TARGET_SINGLE. */
-#define REAL_VALUE_UNTO_TARGET_SINGLE(f) (ereal_unto_float (f))
+#define REAL_VALUE_TO_INT(plow, phigh, r) \
+ real_to_integer2 (plow, phigh, &(r))
-/* 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))
+extern REAL_VALUE_TYPE real_arithmetic2 (int, const REAL_VALUE_TYPE *,
+ const REAL_VALUE_TYPE *);
-/* f is a HOST_WIDE_INT containing a single precision target float value. */
-#define REAL_VALUE_FROM_TARGET_SINGLE(f) (ereal_from_float (f))
+#define REAL_VALUE_NEGATE(X) \
+ real_arithmetic2 (NEGATE_EXPR, &(X), NULL)
-/* Conversions to decimal ASCII string. */
-#define REAL_VALUE_TO_DECIMAL(r, fmt, s) (ereal_to_decimal (r, s))
+#define REAL_VALUE_ABS(X) \
+ real_arithmetic2 (ABS_EXPR, &(X), NULL)
+
+extern int significand_size (enum machine_mode);
+
+extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode);
+
+#define REAL_VALUE_ATOF(s, m) \
+ real_from_string2 (s, m)
+
+#define CONST_DOUBLE_ATOF(s, m) \
+ CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m)
+
+#define REAL_VALUE_FIX(r) \
+ real_to_integer (&(r))
+
+/* ??? 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, 3, 10, -1, -2, 0.5 and 1/3. */
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 dconstsqrt2;
+extern REAL_VALUE_TYPE dconste;
-/* 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) \
- memcpy (&(to), &CONST_DOUBLE_LOW ((from)), sizeof (REAL_VALUE_TYPE))
+/* 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));
+#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));
-extern REAL_VALUE_TYPE ereal_atof PARAMS ((const char *, enum machine_mode));
+extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *);
+
+/* 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 *);
+
+/* 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, tree, mp_rnd_t);
+extern void mpfr_from_real (mpfr_ptr, const REAL_VALUE_TYPE *, mp_rnd_t);
+
+/* 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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