1/* ===-- int_math.h - internal math inlines ---------------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===-----------------------------------------------------------------------=== 9 * 10 * This file is not part of the interface of this library. 11 * 12 * This file defines substitutes for the libm functions used in some of the 13 * compiler-rt implementations, defined in such a way that there is not a direct 14 * dependency on libm or math.h. Instead, we use the compiler builtin versions 15 * where available. This reduces our dependencies on the system SDK by foisting 16 * the responsibility onto the compiler. 17 * 18 * ===-----------------------------------------------------------------------=== 19 */ 20 21#ifndef INT_MATH_H 22#define INT_MATH_H 23 24#ifndef __has_builtin 25# define __has_builtin(x) 0 26#endif 27 28#if defined(_MSC_VER) && !defined(__clang__) 29#include <math.h> 30#include <stdlib.h> 31#include <ymath.h> 32#endif 33 34#if defined(_MSC_VER) && !defined(__clang__) 35#define CRT_INFINITY INFINITY 36#else 37#define CRT_INFINITY __builtin_huge_valf() 38#endif 39 40#if defined(_MSC_VER) && !defined(__clang__) 41#define crt_isfinite(x) _finite((x)) 42#define crt_isinf(x) !_finite((x)) 43#define crt_isnan(x) _isnan((x)) 44#else 45/* Define crt_isfinite in terms of the builtin if available, otherwise provide 46 * an alternate version in terms of our other functions. This supports some 47 * versions of GCC which didn't have __builtin_isfinite. 48 */ 49#if __has_builtin(__builtin_isfinite) 50# define crt_isfinite(x) __builtin_isfinite((x)) 51#elif defined(__GNUC__) 52# define crt_isfinite(x) \ 53 __extension__(({ \ 54 __typeof((x)) x_ = (x); \ 55 !crt_isinf(x_) && !crt_isnan(x_); \ 56 })) 57#else 58# error "Do not know how to check for infinity" 59#endif /* __has_builtin(__builtin_isfinite) */ 60#define crt_isinf(x) __builtin_isinf((x)) 61#define crt_isnan(x) __builtin_isnan((x)) 62#endif /* _MSC_VER */ 63 64#if defined(_MSC_VER) && !defined(__clang__) 65#define crt_copysign(x, y) copysign((x), (y)) 66#define crt_copysignf(x, y) copysignf((x), (y)) 67#define crt_copysignl(x, y) copysignl((x), (y)) 68#else 69#define crt_copysign(x, y) __builtin_copysign((x), (y)) 70#define crt_copysignf(x, y) __builtin_copysignf((x), (y)) 71#define crt_copysignl(x, y) __builtin_copysignl((x), (y)) 72#endif 73 74#if defined(_MSC_VER) && !defined(__clang__) 75#define crt_fabs(x) fabs((x)) 76#define crt_fabsf(x) fabsf((x)) 77#define crt_fabsl(x) fabs((x)) 78#else 79#define crt_fabs(x) __builtin_fabs((x)) 80#define crt_fabsf(x) __builtin_fabsf((x)) 81#define crt_fabsl(x) __builtin_fabsl((x)) 82#endif 83 84#if defined(_MSC_VER) && !defined(__clang__) 85#define crt_fmax(x, y) __max((x), (y)) 86#define crt_fmaxf(x, y) __max((x), (y)) 87#define crt_fmaxl(x, y) __max((x), (y)) 88#else 89#define crt_fmax(x, y) __builtin_fmax((x), (y)) 90#define crt_fmaxf(x, y) __builtin_fmaxf((x), (y)) 91#define crt_fmaxl(x, y) __builtin_fmaxl((x), (y)) 92#endif 93 94#if defined(_MSC_VER) && !defined(__clang__) 95#define crt_logb(x) logb((x)) 96#define crt_logbf(x) logbf((x)) 97#define crt_logbl(x) logbl((x)) 98#else 99#define crt_logb(x) __builtin_logb((x)) 100#define crt_logbf(x) __builtin_logbf((x)) 101#define crt_logbl(x) __builtin_logbl((x)) 102#endif 103 104#if defined(_MSC_VER) && !defined(__clang__) 105#define crt_scalbn(x, y) scalbn((x), (y)) 106#define crt_scalbnf(x, y) scalbnf((x), (y)) 107#define crt_scalbnl(x, y) scalbnl((x), (y)) 108#else 109#define crt_scalbn(x, y) __builtin_scalbn((x), (y)) 110#define crt_scalbnf(x, y) __builtin_scalbnf((x), (y)) 111#define crt_scalbnl(x, y) __builtin_scalbnl((x), (y)) 112#endif 113 114#endif /* INT_MATH_H */ 115