1//===-- int_math.h - internal math inlines --------------------------------===// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file is not part of the interface of this library. 10// 11// This file defines substitutes for the libm functions used in some of the 12// compiler-rt implementations, defined in such a way that there is not a direct 13// dependency on libm or math.h. Instead, we use the compiler builtin versions 14// where available. This reduces our dependencies on the system SDK by foisting 15// the responsibility onto the compiler. 16// 17//===----------------------------------------------------------------------===// 18 19#ifndef INT_MATH_H 20#define INT_MATH_H 21 22#ifndef __has_builtin 23#define __has_builtin(x) 0 24#endif 25 26#if defined(_MSC_VER) && !defined(__clang__) 27#include <math.h> 28#include <stdlib.h> 29#endif 30 31#if defined(_MSC_VER) && !defined(__clang__) 32#define CRT_INFINITY INFINITY 33#else 34#define CRT_INFINITY __builtin_huge_valf() 35#endif 36 37#if defined(_MSC_VER) && !defined(__clang__) 38#define crt_isfinite(x) _finite((x)) 39#define crt_isinf(x) !_finite((x)) 40#define crt_isnan(x) _isnan((x)) 41#else 42// Define crt_isfinite in terms of the builtin if available, otherwise provide 43// an alternate version in terms of our other functions. This supports some 44// versions of GCC which didn't have __builtin_isfinite. 45#if __has_builtin(__builtin_isfinite) 46#define crt_isfinite(x) __builtin_isfinite((x)) 47#elif defined(__GNUC__) 48#define crt_isfinite(x) \ 49 __extension__(({ \ 50 __typeof((x)) x_ = (x); \ 51 !crt_isinf(x_) && !crt_isnan(x_); \ 52 })) 53#else 54#error "Do not know how to check for infinity" 55#endif // __has_builtin(__builtin_isfinite) 56#define crt_isinf(x) __builtin_isinf((x)) 57#define crt_isnan(x) __builtin_isnan((x)) 58#endif // _MSC_VER 59 60#if defined(_MSC_VER) && !defined(__clang__) 61#define crt_copysign(x, y) copysign((x), (y)) 62#define crt_copysignf(x, y) copysignf((x), (y)) 63#define crt_copysignl(x, y) copysignl((x), (y)) 64#else 65#define crt_copysign(x, y) __builtin_copysign((x), (y)) 66#define crt_copysignf(x, y) __builtin_copysignf((x), (y)) 67#define crt_copysignl(x, y) __builtin_copysignl((x), (y)) 68#endif 69 70#if defined(_MSC_VER) && !defined(__clang__) 71#define crt_fabs(x) fabs((x)) 72#define crt_fabsf(x) fabsf((x)) 73#define crt_fabsl(x) fabs((x)) 74#else 75#define crt_fabs(x) __builtin_fabs((x)) 76#define crt_fabsf(x) __builtin_fabsf((x)) 77#define crt_fabsl(x) __builtin_fabsl((x)) 78#endif 79 80#if defined(_MSC_VER) && !defined(__clang__) 81#define crt_fmax(x, y) __max((x), (y)) 82#define crt_fmaxf(x, y) __max((x), (y)) 83#define crt_fmaxl(x, y) __max((x), (y)) 84#else 85#define crt_fmax(x, y) __builtin_fmax((x), (y)) 86#define crt_fmaxf(x, y) __builtin_fmaxf((x), (y)) 87#define crt_fmaxl(x, y) __builtin_fmaxl((x), (y)) 88#endif 89 90#if defined(_MSC_VER) && !defined(__clang__) 91#define crt_logbl(x) logbl((x)) 92#else 93#define crt_logbl(x) __builtin_logbl((x)) 94#endif 95 96#if defined(_MSC_VER) && !defined(__clang__) 97#define crt_scalbn(x, y) scalbn((x), (y)) 98#define crt_scalbnf(x, y) scalbnf((x), (y)) 99#define crt_scalbnl(x, y) scalbnl((x), (y)) 100#else 101#define crt_scalbn(x, y) __builtin_scalbn((x), (y)) 102#define crt_scalbnf(x, y) __builtin_scalbnf((x), (y)) 103#define crt_scalbnl(x, y) __builtin_scalbnl((x), (y)) 104#endif 105 106#endif // INT_MATH_H 107