10b57cec5SDimitry Andric //===-- int_math.h - internal math inlines --------------------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file is not part of the interface of this library. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric // This file defines substitutes for the libm functions used in some of the 120b57cec5SDimitry Andric // compiler-rt implementations, defined in such a way that there is not a direct 130b57cec5SDimitry Andric // dependency on libm or math.h. Instead, we use the compiler builtin versions 140b57cec5SDimitry Andric // where available. This reduces our dependencies on the system SDK by foisting 150b57cec5SDimitry Andric // the responsibility onto the compiler. 160b57cec5SDimitry Andric // 170b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 180b57cec5SDimitry Andric 190b57cec5SDimitry Andric #ifndef INT_MATH_H 200b57cec5SDimitry Andric #define INT_MATH_H 210b57cec5SDimitry Andric 220b57cec5SDimitry Andric #ifndef __has_builtin 230b57cec5SDimitry Andric #define __has_builtin(x) 0 240b57cec5SDimitry Andric #endif 250b57cec5SDimitry Andric 260b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 270b57cec5SDimitry Andric #include <math.h> 280b57cec5SDimitry Andric #include <stdlib.h> 290b57cec5SDimitry Andric #endif 300b57cec5SDimitry Andric 310b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 320b57cec5SDimitry Andric #define CRT_INFINITY INFINITY 330b57cec5SDimitry Andric #else 340b57cec5SDimitry Andric #define CRT_INFINITY __builtin_huge_valf() 350b57cec5SDimitry Andric #endif 360b57cec5SDimitry Andric 370b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 380b57cec5SDimitry Andric #define crt_isfinite(x) _finite((x)) 390b57cec5SDimitry Andric #define crt_isinf(x) !_finite((x)) 400b57cec5SDimitry Andric #define crt_isnan(x) _isnan((x)) 410b57cec5SDimitry Andric #else 420b57cec5SDimitry Andric // Define crt_isfinite in terms of the builtin if available, otherwise provide 430b57cec5SDimitry Andric // an alternate version in terms of our other functions. This supports some 440b57cec5SDimitry Andric // versions of GCC which didn't have __builtin_isfinite. 450b57cec5SDimitry Andric #if __has_builtin(__builtin_isfinite) 460b57cec5SDimitry Andric #define crt_isfinite(x) __builtin_isfinite((x)) 470b57cec5SDimitry Andric #elif defined(__GNUC__) 480b57cec5SDimitry Andric #define crt_isfinite(x) \ 490b57cec5SDimitry Andric __extension__(({ \ 500b57cec5SDimitry Andric __typeof((x)) x_ = (x); \ 510b57cec5SDimitry Andric !crt_isinf(x_) && !crt_isnan(x_); \ 520b57cec5SDimitry Andric })) 530b57cec5SDimitry Andric #else 540b57cec5SDimitry Andric #error "Do not know how to check for infinity" 550b57cec5SDimitry Andric #endif // __has_builtin(__builtin_isfinite) 560b57cec5SDimitry Andric #define crt_isinf(x) __builtin_isinf((x)) 570b57cec5SDimitry Andric #define crt_isnan(x) __builtin_isnan((x)) 580b57cec5SDimitry Andric #endif // _MSC_VER 590b57cec5SDimitry Andric 600b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 610b57cec5SDimitry Andric #define crt_copysign(x, y) copysign((x), (y)) 620b57cec5SDimitry Andric #define crt_copysignf(x, y) copysignf((x), (y)) 630b57cec5SDimitry Andric #define crt_copysignl(x, y) copysignl((x), (y)) 640b57cec5SDimitry Andric #else 650b57cec5SDimitry Andric #define crt_copysign(x, y) __builtin_copysign((x), (y)) 660b57cec5SDimitry Andric #define crt_copysignf(x, y) __builtin_copysignf((x), (y)) 670b57cec5SDimitry Andric #define crt_copysignl(x, y) __builtin_copysignl((x), (y)) 68*415efcecSDimitry Andric // We define __has_builtin to always return 0 for GCC versions below 10, 69*415efcecSDimitry Andric // but __builtin_copysignf128 is available since version 7. 70*415efcecSDimitry Andric #if __has_builtin(__builtin_copysignf128) || \ 71*415efcecSDimitry Andric (defined(__GNUC__) && __GNUC__ >= 7) 725f757f3fSDimitry Andric #define crt_copysignf128(x, y) __builtin_copysignf128((x), (y)) 73*415efcecSDimitry Andric #elif __has_builtin(__builtin_copysignq) 745f757f3fSDimitry Andric #define crt_copysignf128(x, y) __builtin_copysignq((x), (y)) 755f757f3fSDimitry Andric #endif 760b57cec5SDimitry Andric #endif 770b57cec5SDimitry Andric 780b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 790b57cec5SDimitry Andric #define crt_fabs(x) fabs((x)) 800b57cec5SDimitry Andric #define crt_fabsf(x) fabsf((x)) 810b57cec5SDimitry Andric #define crt_fabsl(x) fabs((x)) 820b57cec5SDimitry Andric #else 830b57cec5SDimitry Andric #define crt_fabs(x) __builtin_fabs((x)) 840b57cec5SDimitry Andric #define crt_fabsf(x) __builtin_fabsf((x)) 850b57cec5SDimitry Andric #define crt_fabsl(x) __builtin_fabsl((x)) 86*415efcecSDimitry Andric // We define __has_builtin to always return 0 for GCC versions below 10, 87*415efcecSDimitry Andric // but __builtin_fabsf128 is available since version 7. 88*415efcecSDimitry Andric #if __has_builtin(__builtin_fabsf128) || (defined(__GNUC__) && __GNUC__ >= 7) 895f757f3fSDimitry Andric #define crt_fabsf128(x) __builtin_fabsf128((x)) 90*415efcecSDimitry Andric #elif __has_builtin(__builtin_fabsq) 915f757f3fSDimitry Andric #define crt_fabsf128(x) __builtin_fabsq((x)) 925f757f3fSDimitry Andric #endif 930b57cec5SDimitry Andric #endif 940b57cec5SDimitry Andric 950b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 960b57cec5SDimitry Andric #define crt_fmaxl(x, y) __max((x), (y)) 970b57cec5SDimitry Andric #else 980b57cec5SDimitry Andric #define crt_fmaxl(x, y) __builtin_fmaxl((x), (y)) 990b57cec5SDimitry Andric #endif 1000b57cec5SDimitry Andric 1010b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 1020b57cec5SDimitry Andric #define crt_logbl(x) logbl((x)) 1030b57cec5SDimitry Andric #else 1040b57cec5SDimitry Andric #define crt_logbl(x) __builtin_logbl((x)) 1050b57cec5SDimitry Andric #endif 1060b57cec5SDimitry Andric 1070b57cec5SDimitry Andric #if defined(_MSC_VER) && !defined(__clang__) 1080b57cec5SDimitry Andric #define crt_scalbnl(x, y) scalbnl((x), (y)) 1090b57cec5SDimitry Andric #else 1100b57cec5SDimitry Andric #define crt_scalbnl(x, y) __builtin_scalbnl((x), (y)) 1110b57cec5SDimitry Andric #endif 1120b57cec5SDimitry Andric 1130b57cec5SDimitry Andric #endif // INT_MATH_H 114