/* 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.
+ Copyright (C) 1989-2020 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
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
+ <http://www.gnu.org/licenses/>. */
#ifndef GCC_REAL_H
#define GCC_REAL_H
-#include "machmode.h"
-
/* An expanded form of the represented number. */
/* Enumerate the special cases of numbers that we encounter. */
};
#define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG)
-#define EXP_BITS (32 - 5)
+#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(())
-{
+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;
+ /* 1 if number is decimal floating point. */
+ unsigned int decimal : 1;
+ /* 1 if number is negative. */
unsigned int sign : 1;
+ /* 1 if number is signalling. */
unsigned int signalling : 1;
+ /* 1 if number is canonical
+ All are generally used for handling cases in real.c. */
unsigned int canonical : 1;
+ /* unbiased exponent of the number. */
unsigned int uexp : EXP_BITS;
+ /* significand of the number. */
unsigned long sig[SIGSZ];
};
/* Verify the guess. */
extern char test_real_width
- [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1];
+ [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
/* 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;
or -1 for a complex encoding. */
int signbit_rw;
+ /* If this is an IEEE interchange format, the number of bits in the
+ format; otherwise, if it is an IEEE extended format, one more
+ than the greatest number of bits in an interchange format it
+ extends; otherwise 0. Formats need not follow the IEEE 754-2008
+ recommended practice regarding how signaling NaNs are identified,
+ and may vary in the choice of default NaN, but must follow other
+ IEEE practice regarding having NaNs, infinities and subnormal
+ values, and the relation of minimum and maximum exponents, and,
+ for interchange formats, the details of the encoding. */
+ int ieee_bits;
+
+ /* 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;
+ const char *name;
};
-/* The target format used for each floating floating point mode.
- Indexed by MODE - QFmode. */
+/* 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];
+ 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)) \
+ : GET_MODE_CLASS (MODE) == MODE_FLOAT \
+ ? ((MODE) - MIN_MODE_FLOAT) \
+ : (gcc_unreachable (), 0)])
-#define REAL_MODE_FORMAT(MODE) (real_format_for_mode[(MODE) - MIN_MODE_FLOAT])
+#define FLOAT_MODE_FORMAT(MODE) \
+ (REAL_MODE_FORMAT (as_a <scalar_float_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)
+
+/* This class allows functions in this file to accept a floating-point
+ format as either a mode or an explicit real_format pointer. In the
+ former case the mode must be VOIDmode (which means "no particular
+ format") or must satisfy SCALAR_FLOAT_MODE_P. */
+class format_helper
+{
+public:
+ format_helper (const real_format *format) : m_format (format) {}
+ template<typename T> format_helper (const T &);
+ const real_format *operator-> () const { return m_format; }
+ operator const real_format *() const { return m_format; }
+
+ bool decimal_p () const { return m_format && m_format->b == 10; }
+ bool can_represent_integral_type_p (tree type) const;
+
+private:
+ const real_format *m_format;
+};
+
+template<typename T>
+inline format_helper::format_helper (const T &m)
+ : m_format (m == VOIDmode ? 0 : REAL_MODE_FORMAT (m))
+{}
/* Declare functions in real.c. */
+/* 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. */
+extern bool HONOR_NANS (machine_mode);
+extern bool HONOR_NANS (const_tree);
+extern bool HONOR_NANS (const_rtx);
+
+/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */
+extern bool HONOR_SNANS (machine_mode);
+extern bool HONOR_SNANS (const_tree);
+extern bool HONOR_SNANS (const_rtx);
+
+/* As for HONOR_NANS, but true if the mode can represent infinity and
+ the treatment of infinite values is important. */
+extern bool HONOR_INFINITIES (machine_mode);
+extern bool HONOR_INFINITIES (const_tree);
+extern bool HONOR_INFINITIES (const_rtx);
+
+/* Like HONOR_NANS, but true if the given mode distinguishes between
+ positive and negative zero, and the sign of zero is important. */
+extern bool HONOR_SIGNED_ZEROS (machine_mode);
+extern bool HONOR_SIGNED_ZEROS (const_tree);
+extern bool HONOR_SIGNED_ZEROS (const_rtx);
+
+/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding,
+ and the rounding mode is important. */
+extern bool HONOR_SIGN_DEPENDENT_ROUNDING (machine_mode);
+extern bool HONOR_SIGN_DEPENDENT_ROUNDING (const_tree);
+extern bool HONOR_SIGN_DEPENDENT_ROUNDING (const_rtx);
+
/* Binary or unary arithmetic on tree_code. */
extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *,
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 a signaling NaN. */
+extern bool real_issignaling_nan (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. */
+/* Test relationships between reals. */
extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+extern bool real_equal (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+extern bool real_less (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,
+/* Extend or truncate to a new format. */
+extern void real_convert (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *);
/* Return true if truncating to NEW is exact. */
-extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *);
+extern bool exact_real_truncate (format_helper, 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, 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. */
-extern void real_from_string (REAL_VALUE_TYPE *, const char *);
-/* 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);
+/* 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 *, format_helper);
-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 long real_to_target (long *, const REAL_VALUE_TYPE *, format_helper);
-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);
+ format_helper);
extern void real_inf (REAL_VALUE_TYPE *);
-extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode);
+extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, format_helper);
-extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode);
+extern void real_maxval (REAL_VALUE_TYPE *, int, machine_mode);
-extern void real_2expN (REAL_VALUE_TYPE *, int);
+extern void real_2expN (REAL_VALUE_TYPE *, int, format_helper);
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;
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;
+extern const struct real_format arm_bfloat_half_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) real_isinf (&(x))
/* Determine whether a floating-point value X is a NaN. */
#define REAL_VALUE_ISNAN(x) real_isnan (&(x))
+/* Determine whether a floating-point value X is a signaling NaN. */
+#define REAL_VALUE_ISSIGNALING_NAN(x) real_issignaling_nan (&(x))
+
/* Determine whether a floating-point value X is negative. */
#define REAL_VALUE_NEGATIVE(x) real_isneg (&(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))
+ float_mode_for_size (LONG_DOUBLE_TYPE_SIZE).require ())
#define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \
- real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0))
+ real_to_target (OUT, &(IN), float_mode_for_size (64).require ())
/* 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)))
-
-#define REAL_VALUE_FROM_INT(r, lo, hi, mode) \
- real_from_integer (&(r), mode, lo, hi, 0)
+ ((OUT) = real_to_target (NULL, &(IN), float_mode_for_size (32).require ()))
-#define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \
- real_from_integer (&(r), mode, lo, hi, 1)
+/* Real values to IEEE 754 decimal floats. */
-extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode,
- REAL_VALUE_TYPE);
+/* 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), decimal_float_mode_for_size (128).require ())
-#define REAL_VALUE_TO_INT(plow, phigh, r) \
- real_to_integer2 (plow, phigh, &(r))
+#define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \
+ real_to_target (OUT, &(IN), decimal_float_mode_for_size (64).require ())
-extern REAL_VALUE_TYPE real_arithmetic2 (int, const REAL_VALUE_TYPE *,
- const REAL_VALUE_TYPE *);
+/* IN is a REAL_VALUE_TYPE. OUT is a long. */
+#define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \
+ ((OUT) = real_to_target (NULL, &(IN), \
+ decimal_float_mode_for_size (32).require ()))
-#define REAL_VALUE_NEGATE(X) \
- real_arithmetic2 (NEGATE_EXPR, &(X), NULL)
+extern REAL_VALUE_TYPE real_value_truncate (format_helper, REAL_VALUE_TYPE);
-#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);
+extern int significand_size (format_helper);
-extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode);
+extern REAL_VALUE_TYPE real_from_string2 (const char *, format_helper);
#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)
+ const_double_from_real_value (real_from_string2 (s, m), m)
#define REAL_VALUE_FIX(r) \
real_to_integer (&(r))
/* **** End of software floating point emulator interface macros **** */
\f
-/* 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_quarter() (*dconst_quarter_ptr ())
+#define dconst_sixth() (*dconst_sixth_ptr ())
+#define dconst_ninth() (*dconst_ninth_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 a cached REAL_VALUE_TYPE corresponding to 1/n, for various n. */
+extern const REAL_VALUE_TYPE *dconst_third_ptr (void);
+extern const REAL_VALUE_TYPE *dconst_quarter_ptr (void);
+extern const REAL_VALUE_TYPE *dconst_sixth_ptr (void);
+extern const REAL_VALUE_TYPE *dconst_ninth_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);
-
-/* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */
-#define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \
- memcpy (&(to), &CONST_DOUBLE_LOW ((from)), sizeof (REAL_VALUE_TYPE))
+REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree);
/* Return a CONST_DOUBLE with value R and mode M. */
-#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);
+extern rtx const_double_from_real_value (REAL_VALUE_TYPE, 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 *);
+/* Replace R by 1/R in the given format, if the result is exact. */
+extern bool exact_real_inverse (format_helper, 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 (machine_mode, 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 *);
+/* Likewise, but first truncate the value to the type. */
+extern tree build_real_truncate (tree, 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,
+/* Calculate R as X raised to the integer exponent N in format FMT. */
+extern bool real_powi (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *, HOST_WIDE_INT);
/* Standard round to integer value functions. */
-extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode,
+extern void real_trunc (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *);
-extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode,
+extern void real_floor (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *);
-extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode,
+extern void real_ceil (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *);
-extern void real_round (REAL_VALUE_TYPE *, enum machine_mode,
+extern void real_round (REAL_VALUE_TYPE *, format_helper,
const REAL_VALUE_TYPE *);
+extern void real_roundeven (REAL_VALUE_TYPE *, format_helper,
+ 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 *, format_helper);
+extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *);
+
+/* Calculate nextafter (X, Y) in format FMT. */
+extern bool real_nextafter (REAL_VALUE_TYPE *, format_helper,
+ const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+
+/* 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, bool);
+
+#ifndef GENERATOR_FILE
+/* real related routines. */
+extern wide_int real_to_integer (const REAL_VALUE_TYPE *, bool *, int);
+extern void real_from_integer (REAL_VALUE_TYPE *, format_helper,
+ const wide_int_ref &, signop);
+#endif
+
+/* Fills r with the largest value such that 1 + r*r won't overflow.
+ This is used in both sin (atan (x)) and cos (atan(x)) optimizations. */
+extern void build_sinatan_real (REAL_VALUE_TYPE *, tree);
+
#endif /* ! GCC_REAL_H */
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