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/* Copyright (C) 2002-2018 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 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/*
* ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h>
*/
#ifndef _FLOAT_H___
#define _FLOAT_H___
/* Radix of exponent representation, b. */
#undef FLT_RADIX
#define FLT_RADIX __FLT_RADIX__
/* Number of base-FLT_RADIX digits in the significand, p. */
#undef FLT_MANT_DIG
#undef DBL_MANT_DIG
#undef LDBL_MANT_DIG
#define FLT_MANT_DIG __FLT_MANT_DIG__
#define DBL_MANT_DIG __DBL_MANT_DIG__
#define LDBL_MANT_DIG __LDBL_MANT_DIG__
/* Number of decimal digits, q, such that any floating-point number with q
decimal digits can be rounded into a floating-point number with p radix b
digits and back again without change to the q decimal digits,
p * log10(b) if b is a power of 10
floor((p - 1) * log10(b)) otherwise
*/
#undef FLT_DIG
#undef DBL_DIG
#undef LDBL_DIG
#define FLT_DIG __FLT_DIG__
#define DBL_DIG __DBL_DIG__
#define LDBL_DIG __LDBL_DIG__
/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
#undef FLT_MIN_EXP
#undef DBL_MIN_EXP
#undef LDBL_MIN_EXP
#define FLT_MIN_EXP __FLT_MIN_EXP__
#define DBL_MIN_EXP __DBL_MIN_EXP__
#define LDBL_MIN_EXP __LDBL_MIN_EXP__
/* Minimum negative integer such that 10 raised to that power is in the
range of normalized floating-point numbers,
ceil(log10(b) * (emin - 1))
*/
#undef FLT_MIN_10_EXP
#undef DBL_MIN_10_EXP
#undef LDBL_MIN_10_EXP
#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */
#undef FLT_MAX_EXP
#undef DBL_MAX_EXP
#undef LDBL_MAX_EXP
#define FLT_MAX_EXP __FLT_MAX_EXP__
#define DBL_MAX_EXP __DBL_MAX_EXP__
#define LDBL_MAX_EXP __LDBL_MAX_EXP__
/* Maximum integer such that 10 raised to that power is in the range of
representable finite floating-point numbers,
floor(log10((1 - b**-p) * b**emax))
*/
#undef FLT_MAX_10_EXP
#undef DBL_MAX_10_EXP
#undef LDBL_MAX_10_EXP
#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
/* Maximum representable finite floating-point number,
(1 - b**-p) * b**emax
*/
#undef FLT_MAX
#undef DBL_MAX
#undef LDBL_MAX
#define FLT_MAX __FLT_MAX__
#define DBL_MAX __DBL_MAX__
#define LDBL_MAX __LDBL_MAX__
/* The difference between 1 and the least value greater than 1 that is
representable in the given floating point type, b**1-p. */
#undef FLT_EPSILON
#undef DBL_EPSILON
#undef LDBL_EPSILON
#define FLT_EPSILON __FLT_EPSILON__
#define DBL_EPSILON __DBL_EPSILON__
#define LDBL_EPSILON __LDBL_EPSILON__
/* Minimum normalized positive floating-point number, b**(emin - 1). */
#undef FLT_MIN
#undef DBL_MIN
#undef LDBL_MIN
#define FLT_MIN __FLT_MIN__
#define DBL_MIN __DBL_MIN__
#define LDBL_MIN __LDBL_MIN__
/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */
/* ??? This is supposed to change with calls to fesetround in <fenv.h>. */
#undef FLT_ROUNDS
#define FLT_ROUNDS 1
#if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
|| (defined (__cplusplus) && __cplusplus >= 201103L)
/* The floating-point expression evaluation method. The precise
definitions of these values are generalised to include support for
the interchange and extended types defined in ISO/IEC TS 18661-3.
Prior to this (for C99/C11) the definitions were:
-1 indeterminate
0 evaluate all operations and constants just to the range and
precision of the type
1 evaluate operations and constants of type float and double
to the range and precision of the double type, evaluate
long double operations and constants to the range and
precision of the long double type
2 evaluate all operations and constants to the range and
precision of the long double type
The TS 18661-3 definitions are:
-1 indeterminate
0 evaluate all operations and constants, whose semantic type has
at most the range and precision of float, to the range and
precision of float; evaluate all other operations and constants
to the range and precision of the semantic type.
1 evaluate all operations and constants, whose semantic type has
at most the range and precision of double, to the range and
precision of double; evaluate all other operations and constants
to the range and precision of the semantic type.
2 evaluate all operations and constants, whose semantic type has
at most the range and precision of long double, to the range and
precision of long double; evaluate all other operations and
constants to the range and precision of the semantic type.
N where _FloatN is a supported interchange floating type
evaluate all operations and constants, whose semantic type has
at most the range and precision of the _FloatN type, to the
range and precision of the _FloatN type; evaluate all other
operations and constants to the range and precision of the
semantic type.
N + 1, where _FloatNx is a supported extended floating type
evaluate operations and constants, whose semantic type has at
most the range and precision of the _FloatNx type, to the range
and precision of the _FloatNx type; evaluate all other
operations and constants to the range and precision of the
semantic type.
The compiler predefines two macros:
__FLT_EVAL_METHOD__
Which, depending on the value given for
-fpermitted-flt-eval-methods, may be limited to only those values
for FLT_EVAL_METHOD defined in C99/C11.
__FLT_EVAL_METHOD_TS_18661_3__
Which always permits the values for FLT_EVAL_METHOD defined in
ISO/IEC TS 18661-3.
Here we want to use __FLT_EVAL_METHOD__, unless
__STDC_WANT_IEC_60559_TYPES_EXT__ is defined, in which case the user
is specifically asking for the ISO/IEC TS 18661-3 types, so we use
__FLT_EVAL_METHOD_TS_18661_3__.
??? This ought to change with the setting of the fp control word;
the value provided by the compiler assumes the widest setting. */
#undef FLT_EVAL_METHOD
#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD_TS_18661_3__
#else
#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
#endif
/* Number of decimal digits, n, such that any floating-point number in the
widest supported floating type with pmax radix b digits can be rounded
to a floating-point number with n decimal digits and back again without
change to the value,
pmax * log10(b) if b is a power of 10
ceil(1 + pmax * log10(b)) otherwise
*/
#undef DECIMAL_DIG
#define DECIMAL_DIG __DECIMAL_DIG__
#endif /* C99 */
#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
/* Versions of DECIMAL_DIG for each floating-point type. */
#undef FLT_DECIMAL_DIG
#undef DBL_DECIMAL_DIG
#undef LDBL_DECIMAL_DIG
#define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
#define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
#define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
/* Whether types support subnormal numbers. */
#undef FLT_HAS_SUBNORM
#undef DBL_HAS_SUBNORM
#undef LDBL_HAS_SUBNORM
#define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
#define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
#define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
/* Minimum positive values, including subnormals. */
#undef FLT_TRUE_MIN
#undef DBL_TRUE_MIN
#undef LDBL_TRUE_MIN
#define FLT_TRUE_MIN __FLT_DENORM_MIN__
#define DBL_TRUE_MIN __DBL_DENORM_MIN__
#define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
#endif /* C11 */
#ifdef __STDC_WANT_IEC_60559_BFP_EXT__
/* Number of decimal digits for which conversions between decimal
character strings and binary formats, in both directions, are
correctly rounded. */
#define CR_DECIMAL_DIG __UINTMAX_MAX__
#endif
#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
/* Constants for _FloatN and _FloatNx types from TS 18661-3. See
comments above for their semantics. */
#ifdef __FLT16_MANT_DIG__
#undef FLT16_MANT_DIG
#define FLT16_MANT_DIG __FLT16_MANT_DIG__
#undef FLT16_DIG
#define FLT16_DIG __FLT16_DIG__
#undef FLT16_MIN_EXP
#define FLT16_MIN_EXP __FLT16_MIN_EXP__
#undef FLT16_MIN_10_EXP
#define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
#undef FLT16_MAX_EXP
#define FLT16_MAX_EXP __FLT16_MAX_EXP__
#undef FLT16_MAX_10_EXP
#define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
#undef FLT16_MAX
#define FLT16_MAX __FLT16_MAX__
#undef FLT16_EPSILON
#define FLT16_EPSILON __FLT16_EPSILON__
#undef FLT16_MIN
#define FLT16_MIN __FLT16_MIN__
#undef FLT16_DECIMAL_DIG
#define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
#undef FLT16_TRUE_MIN
#define FLT16_TRUE_MIN __FLT16_DENORM_MIN__
#endif /* __FLT16_MANT_DIG__. */
#ifdef __FLT32_MANT_DIG__
#undef FLT32_MANT_DIG
#define FLT32_MANT_DIG __FLT32_MANT_DIG__
#undef FLT32_DIG
#define FLT32_DIG __FLT32_DIG__
#undef FLT32_MIN_EXP
#define FLT32_MIN_EXP __FLT32_MIN_EXP__
#undef FLT32_MIN_10_EXP
#define FLT32_MIN_10_EXP __FLT32_MIN_10_EXP__
#undef FLT32_MAX_EXP
#define FLT32_MAX_EXP __FLT32_MAX_EXP__
#undef FLT32_MAX_10_EXP
#define FLT32_MAX_10_EXP __FLT32_MAX_10_EXP__
#undef FLT32_MAX
#define FLT32_MAX __FLT32_MAX__
#undef FLT32_EPSILON
#define FLT32_EPSILON __FLT32_EPSILON__
#undef FLT32_MIN
#define FLT32_MIN __FLT32_MIN__
#undef FLT32_DECIMAL_DIG
#define FLT32_DECIMAL_DIG __FLT32_DECIMAL_DIG__
#undef FLT32_TRUE_MIN
#define FLT32_TRUE_MIN __FLT32_DENORM_MIN__
#endif /* __FLT32_MANT_DIG__. */
#ifdef __FLT64_MANT_DIG__
#undef FLT64_MANT_DIG
#define FLT64_MANT_DIG __FLT64_MANT_DIG__
#undef FLT64_DIG
#define FLT64_DIG __FLT64_DIG__
#undef FLT64_MIN_EXP
#define FLT64_MIN_EXP __FLT64_MIN_EXP__
#undef FLT64_MIN_10_EXP
#define FLT64_MIN_10_EXP __FLT64_MIN_10_EXP__
#undef FLT64_MAX_EXP
#define FLT64_MAX_EXP __FLT64_MAX_EXP__
#undef FLT64_MAX_10_EXP
#define FLT64_MAX_10_EXP __FLT64_MAX_10_EXP__
#undef FLT64_MAX
#define FLT64_MAX __FLT64_MAX__
#undef FLT64_EPSILON
#define FLT64_EPSILON __FLT64_EPSILON__
#undef FLT64_MIN
#define FLT64_MIN __FLT64_MIN__
#undef FLT64_DECIMAL_DIG
#define FLT64_DECIMAL_DIG __FLT64_DECIMAL_DIG__
#undef FLT64_TRUE_MIN
#define FLT64_TRUE_MIN __FLT64_DENORM_MIN__
#endif /* __FLT64_MANT_DIG__. */
#ifdef __FLT128_MANT_DIG__
#undef FLT128_MANT_DIG
#define FLT128_MANT_DIG __FLT128_MANT_DIG__
#undef FLT128_DIG
#define FLT128_DIG __FLT128_DIG__
#undef FLT128_MIN_EXP
#define FLT128_MIN_EXP __FLT128_MIN_EXP__
#undef FLT128_MIN_10_EXP
#define FLT128_MIN_10_EXP __FLT128_MIN_10_EXP__
#undef FLT128_MAX_EXP
#define FLT128_MAX_EXP __FLT128_MAX_EXP__
#undef FLT128_MAX_10_EXP
#define FLT128_MAX_10_EXP __FLT128_MAX_10_EXP__
#undef FLT128_MAX
#define FLT128_MAX __FLT128_MAX__
#undef FLT128_EPSILON
#define FLT128_EPSILON __FLT128_EPSILON__
#undef FLT128_MIN
#define FLT128_MIN __FLT128_MIN__
#undef FLT128_DECIMAL_DIG
#define FLT128_DECIMAL_DIG __FLT128_DECIMAL_DIG__
#undef FLT128_TRUE_MIN
#define FLT128_TRUE_MIN __FLT128_DENORM_MIN__
#endif /* __FLT128_MANT_DIG__. */
#ifdef __FLT32X_MANT_DIG__
#undef FLT32X_MANT_DIG
#define FLT32X_MANT_DIG __FLT32X_MANT_DIG__
#undef FLT32X_DIG
#define FLT32X_DIG __FLT32X_DIG__
#undef FLT32X_MIN_EXP
#define FLT32X_MIN_EXP __FLT32X_MIN_EXP__
#undef FLT32X_MIN_10_EXP
#define FLT32X_MIN_10_EXP __FLT32X_MIN_10_EXP__
#undef FLT32X_MAX_EXP
#define FLT32X_MAX_EXP __FLT32X_MAX_EXP__
#undef FLT32X_MAX_10_EXP
#define FLT32X_MAX_10_EXP __FLT32X_MAX_10_EXP__
#undef FLT32X_MAX
#define FLT32X_MAX __FLT32X_MAX__
#undef FLT32X_EPSILON
#define FLT32X_EPSILON __FLT32X_EPSILON__
#undef FLT32X_MIN
#define FLT32X_MIN __FLT32X_MIN__
#undef FLT32X_DECIMAL_DIG
#define FLT32X_DECIMAL_DIG __FLT32X_DECIMAL_DIG__
#undef FLT32X_TRUE_MIN
#define FLT32X_TRUE_MIN __FLT32X_DENORM_MIN__
#endif /* __FLT32X_MANT_DIG__. */
#ifdef __FLT64X_MANT_DIG__
#undef FLT64X_MANT_DIG
#define FLT64X_MANT_DIG __FLT64X_MANT_DIG__
#undef FLT64X_DIG
#define FLT64X_DIG __FLT64X_DIG__
#undef FLT64X_MIN_EXP
#define FLT64X_MIN_EXP __FLT64X_MIN_EXP__
#undef FLT64X_MIN_10_EXP
#define FLT64X_MIN_10_EXP __FLT64X_MIN_10_EXP__
#undef FLT64X_MAX_EXP
#define FLT64X_MAX_EXP __FLT64X_MAX_EXP__
#undef FLT64X_MAX_10_EXP
#define FLT64X_MAX_10_EXP __FLT64X_MAX_10_EXP__
#undef FLT64X_MAX
#define FLT64X_MAX __FLT64X_MAX__
#undef FLT64X_EPSILON
#define FLT64X_EPSILON __FLT64X_EPSILON__
#undef FLT64X_MIN
#define FLT64X_MIN __FLT64X_MIN__
#undef FLT64X_DECIMAL_DIG
#define FLT64X_DECIMAL_DIG __FLT64X_DECIMAL_DIG__
#undef FLT64X_TRUE_MIN
#define FLT64X_TRUE_MIN __FLT64X_DENORM_MIN__
#endif /* __FLT64X_MANT_DIG__. */
#ifdef __FLT128X_MANT_DIG__
#undef FLT128X_MANT_DIG
#define FLT128X_MANT_DIG __FLT128X_MANT_DIG__
#undef FLT128X_DIG
#define FLT128X_DIG __FLT128X_DIG__
#undef FLT128X_MIN_EXP
#define FLT128X_MIN_EXP __FLT128X_MIN_EXP__
#undef FLT128X_MIN_10_EXP
#define FLT128X_MIN_10_EXP __FLT128X_MIN_10_EXP__
#undef FLT128X_MAX_EXP
#define FLT128X_MAX_EXP __FLT128X_MAX_EXP__
#undef FLT128X_MAX_10_EXP
#define FLT128X_MAX_10_EXP __FLT128X_MAX_10_EXP__
#undef FLT128X_MAX
#define FLT128X_MAX __FLT128X_MAX__
#undef FLT128X_EPSILON
#define FLT128X_EPSILON __FLT128X_EPSILON__
#undef FLT128X_MIN
#define FLT128X_MIN __FLT128X_MIN__
#undef FLT128X_DECIMAL_DIG
#define FLT128X_DECIMAL_DIG __FLT128X_DECIMAL_DIG__
#undef FLT128X_TRUE_MIN
#define FLT128X_TRUE_MIN __FLT128X_DENORM_MIN__
#endif /* __FLT128X_MANT_DIG__. */
#endif /* __STDC_WANT_IEC_60559_TYPES_EXT__. */
#ifdef __STDC_WANT_DEC_FP__
/* Draft Technical Report 24732, extension for decimal floating-point
arithmetic: Characteristic of decimal floating types <float.h>. */
/* Number of base-FLT_RADIX digits in the significand, p. */
#undef DEC32_MANT_DIG
#undef DEC64_MANT_DIG
#undef DEC128_MANT_DIG
#define DEC32_MANT_DIG __DEC32_MANT_DIG__
#define DEC64_MANT_DIG __DEC64_MANT_DIG__
#define DEC128_MANT_DIG __DEC128_MANT_DIG__
/* Minimum exponent. */
#undef DEC32_MIN_EXP
#undef DEC64_MIN_EXP
#undef DEC128_MIN_EXP
#define DEC32_MIN_EXP __DEC32_MIN_EXP__
#define DEC64_MIN_EXP __DEC64_MIN_EXP__
#define DEC128_MIN_EXP __DEC128_MIN_EXP__
/* Maximum exponent. */
#undef DEC32_MAX_EXP
#undef DEC64_MAX_EXP
#undef DEC128_MAX_EXP
#define DEC32_MAX_EXP __DEC32_MAX_EXP__
#define DEC64_MAX_EXP __DEC64_MAX_EXP__
#define DEC128_MAX_EXP __DEC128_MAX_EXP__
/* Maximum representable finite decimal floating-point number
(there are 6, 15, and 33 9s after the decimal points respectively). */
#undef DEC32_MAX
#undef DEC64_MAX
#undef DEC128_MAX
#define DEC32_MAX __DEC32_MAX__
#define DEC64_MAX __DEC64_MAX__
#define DEC128_MAX __DEC128_MAX__
/* The difference between 1 and the least value greater than 1 that is
representable in the given floating point type. */
#undef DEC32_EPSILON
#undef DEC64_EPSILON
#undef DEC128_EPSILON
#define DEC32_EPSILON __DEC32_EPSILON__
#define DEC64_EPSILON __DEC64_EPSILON__
#define DEC128_EPSILON __DEC128_EPSILON__
/* Minimum normalized positive floating-point number. */
#undef DEC32_MIN
#undef DEC64_MIN
#undef DEC128_MIN
#define DEC32_MIN __DEC32_MIN__
#define DEC64_MIN __DEC64_MIN__
#define DEC128_MIN __DEC128_MIN__
/* Minimum subnormal positive floating-point number. */
#undef DEC32_SUBNORMAL_MIN
#undef DEC64_SUBNORMAL_MIN
#undef DEC128_SUBNORMAL_MIN
#define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__
#define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__
#define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__
/* The floating-point expression evaluation method.
-1 indeterminate
0 evaluate all operations and constants just to the range and
precision of the type
1 evaluate operations and constants of type _Decimal32
and _Decimal64 to the range and precision of the _Decimal64
type, evaluate _Decimal128 operations and constants to the
range and precision of the _Decimal128 type;
2 evaluate all operations and constants to the range and
precision of the _Decimal128 type. */
#undef DEC_EVAL_METHOD
#define DEC_EVAL_METHOD __DEC_EVAL_METHOD__
#endif /* __STDC_WANT_DEC_FP__ */
#endif /* _FLOAT_H___ */
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