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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-exception6//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 the12// compiler-rt implementations, defined in such a way that there is not a direct13// dependency on libm or math.h. Instead, we use the compiler builtin versions14// where available. This reduces our dependencies on the system SDK by foisting15// the responsibility onto the compiler.16//17//===----------------------------------------------------------------------===//18 19#ifndef INT_MATH_H20#define INT_MATH_H21 22#ifndef __has_builtin23#define __has_builtin(x) 024#endif25 26#if defined(_MSC_VER) && !defined(__clang__)27#include <math.h>28#include <stdlib.h>29#endif30 31#if defined(_MSC_VER) && !defined(__clang__)32#define CRT_INFINITY INFINITY33#else34#define CRT_INFINITY __builtin_huge_valf()35#endif36 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#else42// Define crt_isfinite in terms of the builtin if available, otherwise provide43// an alternate version in terms of our other functions. This supports some44// 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#else54#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_VER59 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#else65#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// We define __has_builtin to always return 0 for GCC versions below 10,69// but __builtin_copysignf128 is available since version 7.70#if __has_builtin(__builtin_copysignf128) || \71 (defined(__GNUC__) && __GNUC__ >= 7)72#define crt_copysignf128(x, y) __builtin_copysignf128((x), (y))73#elif __has_builtin(__builtin_copysignq)74#define crt_copysignf128(x, y) __builtin_copysignq((x), (y))75#endif76#endif77 78#if defined(_MSC_VER) && !defined(__clang__)79#define crt_fabs(x) fabs((x))80#define crt_fabsf(x) fabsf((x))81#define crt_fabsl(x) fabs((x))82#else83#define crt_fabs(x) __builtin_fabs((x))84#define crt_fabsf(x) __builtin_fabsf((x))85#define crt_fabsl(x) __builtin_fabsl((x))86// We define __has_builtin to always return 0 for GCC versions below 10,87// but __builtin_fabsf128 is available since version 7.88#if __has_builtin(__builtin_fabsf128) || (defined(__GNUC__) && __GNUC__ >= 7)89#define crt_fabsf128(x) __builtin_fabsf128((x))90#elif __has_builtin(__builtin_fabsq)91#define crt_fabsf128(x) __builtin_fabsq((x))92#endif93#endif94 95#if defined(_MSC_VER) && !defined(__clang__)96#define crt_fmaxl(x, y) __max((x), (y))97#else98#define crt_fmaxl(x, y) __builtin_fmaxl((x), (y))99#endif100 101#if defined(_MSC_VER) && !defined(__clang__)102#define crt_logbl(x) logbl((x))103#else104#define crt_logbl(x) __builtin_logbl((x))105#endif106 107#if defined(_MSC_VER) && !defined(__clang__)108#define crt_scalbnl(x, y) scalbnl((x), (y))109#else110#define crt_scalbnl(x, y) __builtin_scalbnl((x), (y))111#endif112 113#endif // INT_MATH_H114