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267 lines
8.5 KiB
C
267 lines
8.5 KiB
C
4 years ago
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/* Copyright (C) 2002-2016 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/*
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* ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h>
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*/
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#ifndef _FLOAT_H___
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#define _FLOAT_H___
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/* Radix of exponent representation, b. */
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#undef FLT_RADIX
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#define FLT_RADIX __FLT_RADIX__
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/* Number of base-FLT_RADIX digits in the significand, p. */
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#undef FLT_MANT_DIG
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#undef DBL_MANT_DIG
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#undef LDBL_MANT_DIG
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#define FLT_MANT_DIG __FLT_MANT_DIG__
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#define DBL_MANT_DIG __DBL_MANT_DIG__
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#define LDBL_MANT_DIG __LDBL_MANT_DIG__
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/* Number of decimal digits, q, such that any floating-point number with q
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decimal digits can be rounded into a floating-point number with p radix b
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digits and back again without change to the q decimal digits,
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p * log10(b) if b is a power of 10
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floor((p - 1) * log10(b)) otherwise
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*/
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#undef FLT_DIG
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#undef DBL_DIG
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#undef LDBL_DIG
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#define FLT_DIG __FLT_DIG__
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#define DBL_DIG __DBL_DIG__
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#define LDBL_DIG __LDBL_DIG__
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/* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */
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#undef FLT_MIN_EXP
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#undef DBL_MIN_EXP
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#undef LDBL_MIN_EXP
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#define FLT_MIN_EXP __FLT_MIN_EXP__
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#define DBL_MIN_EXP __DBL_MIN_EXP__
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#define LDBL_MIN_EXP __LDBL_MIN_EXP__
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/* Minimum negative integer such that 10 raised to that power is in the
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range of normalized floating-point numbers,
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ceil(log10(b) * (emin - 1))
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*/
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#undef FLT_MIN_10_EXP
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#undef DBL_MIN_10_EXP
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#undef LDBL_MIN_10_EXP
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#define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
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#define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
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#define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
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/* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */
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#undef FLT_MAX_EXP
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#undef DBL_MAX_EXP
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#undef LDBL_MAX_EXP
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#define FLT_MAX_EXP __FLT_MAX_EXP__
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#define DBL_MAX_EXP __DBL_MAX_EXP__
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#define LDBL_MAX_EXP __LDBL_MAX_EXP__
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/* Maximum integer such that 10 raised to that power is in the range of
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representable finite floating-point numbers,
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floor(log10((1 - b**-p) * b**emax))
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*/
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#undef FLT_MAX_10_EXP
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#undef DBL_MAX_10_EXP
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#undef LDBL_MAX_10_EXP
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#define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
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#define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
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#define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
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/* Maximum representable finite floating-point number,
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(1 - b**-p) * b**emax
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*/
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#undef FLT_MAX
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#undef DBL_MAX
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#undef LDBL_MAX
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#define FLT_MAX __FLT_MAX__
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#define DBL_MAX __DBL_MAX__
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#define LDBL_MAX __LDBL_MAX__
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/* The difference between 1 and the least value greater than 1 that is
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representable in the given floating point type, b**1-p. */
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#undef FLT_EPSILON
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#undef DBL_EPSILON
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#undef LDBL_EPSILON
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#define FLT_EPSILON __FLT_EPSILON__
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#define DBL_EPSILON __DBL_EPSILON__
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#define LDBL_EPSILON __LDBL_EPSILON__
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/* Minimum normalized positive floating-point number, b**(emin - 1). */
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#undef FLT_MIN
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#undef DBL_MIN
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#undef LDBL_MIN
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#define FLT_MIN __FLT_MIN__
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#define DBL_MIN __DBL_MIN__
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#define LDBL_MIN __LDBL_MIN__
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/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */
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/* ??? This is supposed to change with calls to fesetround in <fenv.h>. */
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#undef FLT_ROUNDS
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#define FLT_ROUNDS 1
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#if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) \
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|| (defined (__cplusplus) && __cplusplus >= 201103L)
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/* The floating-point expression evaluation method.
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-1 indeterminate
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0 evaluate all operations and constants just to the range and
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precision of the type
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1 evaluate operations and constants of type float and double
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to the range and precision of the double type, evaluate
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long double operations and constants to the range and
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precision of the long double type
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2 evaluate all operations and constants to the range and
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precision of the long double type
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??? This ought to change with the setting of the fp control word;
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the value provided by the compiler assumes the widest setting. */
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#undef FLT_EVAL_METHOD
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#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
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/* Number of decimal digits, n, such that any floating-point number in the
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widest supported floating type with pmax radix b digits can be rounded
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to a floating-point number with n decimal digits and back again without
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change to the value,
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pmax * log10(b) if b is a power of 10
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ceil(1 + pmax * log10(b)) otherwise
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*/
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#undef DECIMAL_DIG
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#define DECIMAL_DIG __DECIMAL_DIG__
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#endif /* C99 */
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#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
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/* Versions of DECIMAL_DIG for each floating-point type. */
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#undef FLT_DECIMAL_DIG
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#undef DBL_DECIMAL_DIG
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#undef LDBL_DECIMAL_DIG
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#define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
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#define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
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#define LDBL_DECIMAL_DIG __DECIMAL_DIG__
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/* Whether types support subnormal numbers. */
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#undef FLT_HAS_SUBNORM
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#undef DBL_HAS_SUBNORM
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#undef LDBL_HAS_SUBNORM
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#define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
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#define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
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#define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
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/* Minimum positive values, including subnormals. */
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#undef FLT_TRUE_MIN
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#undef DBL_TRUE_MIN
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#undef LDBL_TRUE_MIN
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#define FLT_TRUE_MIN __FLT_DENORM_MIN__
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#define DBL_TRUE_MIN __DBL_DENORM_MIN__
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#define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
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#endif /* C11 */
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#ifdef __STDC_WANT_DEC_FP__
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/* Draft Technical Report 24732, extension for decimal floating-point
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arithmetic: Characteristic of decimal floating types <float.h>. */
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/* Number of base-FLT_RADIX digits in the significand, p. */
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#undef DEC32_MANT_DIG
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#undef DEC64_MANT_DIG
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#undef DEC128_MANT_DIG
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#define DEC32_MANT_DIG __DEC32_MANT_DIG__
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#define DEC64_MANT_DIG __DEC64_MANT_DIG__
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#define DEC128_MANT_DIG __DEC128_MANT_DIG__
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/* Minimum exponent. */
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#undef DEC32_MIN_EXP
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#undef DEC64_MIN_EXP
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#undef DEC128_MIN_EXP
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#define DEC32_MIN_EXP __DEC32_MIN_EXP__
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#define DEC64_MIN_EXP __DEC64_MIN_EXP__
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#define DEC128_MIN_EXP __DEC128_MIN_EXP__
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/* Maximum exponent. */
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#undef DEC32_MAX_EXP
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#undef DEC64_MAX_EXP
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#undef DEC128_MAX_EXP
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#define DEC32_MAX_EXP __DEC32_MAX_EXP__
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#define DEC64_MAX_EXP __DEC64_MAX_EXP__
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#define DEC128_MAX_EXP __DEC128_MAX_EXP__
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/* Maximum representable finite decimal floating-point number
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(there are 6, 15, and 33 9s after the decimal points respectively). */
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#undef DEC32_MAX
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#undef DEC64_MAX
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#undef DEC128_MAX
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#define DEC32_MAX __DEC32_MAX__
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#define DEC64_MAX __DEC64_MAX__
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#define DEC128_MAX __DEC128_MAX__
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/* The difference between 1 and the least value greater than 1 that is
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representable in the given floating point type. */
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#undef DEC32_EPSILON
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#undef DEC64_EPSILON
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#undef DEC128_EPSILON
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#define DEC32_EPSILON __DEC32_EPSILON__
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#define DEC64_EPSILON __DEC64_EPSILON__
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#define DEC128_EPSILON __DEC128_EPSILON__
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/* Minimum normalized positive floating-point number. */
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#undef DEC32_MIN
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#undef DEC64_MIN
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#undef DEC128_MIN
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#define DEC32_MIN __DEC32_MIN__
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#define DEC64_MIN __DEC64_MIN__
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#define DEC128_MIN __DEC128_MIN__
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/* Minimum subnormal positive floating-point number. */
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#undef DEC32_SUBNORMAL_MIN
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#undef DEC64_SUBNORMAL_MIN
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#undef DEC128_SUBNORMAL_MIN
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#define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__
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#define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__
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#define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__
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/* The floating-point expression evaluation method.
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-1 indeterminate
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0 evaluate all operations and constants just to the range and
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precision of the type
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1 evaluate operations and constants of type _Decimal32
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and _Decimal64 to the range and precision of the _Decimal64
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type, evaluate _Decimal128 operations and constants to the
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range and precision of the _Decimal128 type;
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2 evaluate all operations and constants to the range and
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precision of the _Decimal128 type. */
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#undef DEC_EVAL_METHOD
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#define DEC_EVAL_METHOD __DEC_EVAL_METHOD__
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#endif /* __STDC_WANT_DEC_FP__ */
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#endif /* _FLOAT_H___ */
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