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clang
20.0.0git
lib
Headers
float.h
Go to the documentation of this file.
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/*===---- float.h - Characteristics of floating point types ----------------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __CLANG_FLOAT_H
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#define __CLANG_FLOAT_H
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#if defined(__MVS__) && __has_include_next(<float.h>)
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#include_next <float.h>
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#else
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/* If we're on MinGW, fall back to the system's float.h, which might have
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* additional definitions provided for Windows.
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* For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
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*
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* Also fall back on Darwin and AIX to allow additional definitions and
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* implementation-defined values.
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*/
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#if (defined(__APPLE__) || defined(__MINGW32__) || defined(_MSC_VER) || \
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defined(_AIX)) && \
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__STDC_HOSTED__ && __has_include_next(<float.h>)
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/* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level
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* of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this
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* extra indirection.
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*/
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#ifdef __APPLE__
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#define _FLOAT_H_
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#endif
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# include_next <float.h>
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/* Undefine anything that we'll be redefining below. */
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# undef FLT_EVAL_METHOD
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# undef FLT_ROUNDS
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# undef FLT_RADIX
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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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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
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!defined(__STRICT_ANSI__) || \
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(defined(__cplusplus) && __cplusplus >= 201103L) || \
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(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
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# undef DECIMAL_DIG
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# endif
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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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# undef FLT_MIN_EXP
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# undef DBL_MIN_EXP
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# undef LDBL_MIN_EXP
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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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# undef FLT_MAX_EXP
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# undef DBL_MAX_EXP
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# undef LDBL_MAX_EXP
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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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# undef FLT_MAX
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# undef DBL_MAX
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# undef LDBL_MAX
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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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# undef FLT_MIN
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# undef DBL_MIN
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# undef LDBL_MIN
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
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!defined(__STRICT_ANSI__) || \
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(defined(__cplusplus) && __cplusplus >= 201703L) || \
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(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
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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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# undef FLT_DECIMAL_DIG
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# undef DBL_DECIMAL_DIG
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# undef LDBL_DECIMAL_DIG
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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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# endif
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
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!defined(__STRICT_ANSI__)
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# undef FLT_NORM_MAX
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# undef DBL_NORM_MAX
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# undef LDBL_NORM_MAX
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#endif
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#endif
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
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!defined(__STRICT_ANSI__)
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# undef INFINITY
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# undef NAN
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#endif
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/* Characteristics of floating point types, C99 5.2.4.2.2 */
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
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(defined(__cplusplus) && __cplusplus >= 201103L)
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#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
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#endif
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#define FLT_ROUNDS (__builtin_flt_rounds())
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#define FLT_RADIX __FLT_RADIX__
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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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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
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!defined(__STRICT_ANSI__) || \
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(defined(__cplusplus) && __cplusplus >= 201103L) || \
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(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
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# define DECIMAL_DIG __DECIMAL_DIG__
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#endif
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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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#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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#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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#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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#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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#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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#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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#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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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
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!defined(__STRICT_ANSI__) || \
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(defined(__cplusplus) && __cplusplus >= 201703L) || \
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(__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE))
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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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# 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 __LDBL_DECIMAL_DIG__
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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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#endif
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#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \
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!defined(__STRICT_ANSI__)
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/* C23 5.2.5.3.3p29-30 */
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# define INFINITY (__builtin_inff())
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# define NAN (__builtin_nanf(""
))
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/* C23 5.2.5.3.3p32 */
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# define FLT_NORM_MAX __FLT_NORM_MAX__
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# define DBL_NORM_MAX __DBL_NORM_MAX__
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# define LDBL_NORM_MAX __LDBL_NORM_MAX__
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#endif
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#ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
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# define FLT16_MANT_DIG __FLT16_MANT_DIG__
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# define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
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# define FLT16_DIG __FLT16_DIG__
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# define FLT16_MIN_EXP __FLT16_MIN_EXP__
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# define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
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# define FLT16_MAX_EXP __FLT16_MAX_EXP__
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# define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
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# define FLT16_MAX __FLT16_MAX__
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# define FLT16_EPSILON __FLT16_EPSILON__
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# define FLT16_MIN __FLT16_MIN__
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# define FLT16_TRUE_MIN __FLT16_TRUE_MIN__
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#endif
/* __STDC_WANT_IEC_60559_TYPES_EXT__ */
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#endif
/* __MVS__ */
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#endif
/* __CLANG_FLOAT_H */
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