| //===-- int_math.h - internal math inlines --------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file is not part of the interface of this library. |
| // |
| // This file defines substitutes for the libm functions used in some of the |
| // compiler-rt implementations, defined in such a way that there is not a direct |
| // dependency on libm or math.h. Instead, we use the compiler builtin versions |
| // where available. This reduces our dependencies on the system SDK by foisting |
| // the responsibility onto the compiler. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef INT_MATH_H |
| #define INT_MATH_H |
| |
| #ifndef __has_builtin |
| #define __has_builtin(x) 0 |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #include <math.h> |
| #include <stdlib.h> |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define CRT_INFINITY INFINITY |
| #else |
| #define CRT_INFINITY __builtin_huge_valf() |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_isfinite(x) _finite((x)) |
| #define crt_isinf(x) !_finite((x)) |
| #define crt_isnan(x) _isnan((x)) |
| #else |
| // Define crt_isfinite in terms of the builtin if available, otherwise provide |
| // an alternate version in terms of our other functions. This supports some |
| // versions of GCC which didn't have __builtin_isfinite. |
| #if __has_builtin(__builtin_isfinite) |
| #define crt_isfinite(x) __builtin_isfinite((x)) |
| #elif defined(__GNUC__) |
| #define crt_isfinite(x) \ |
| __extension__(({ \ |
| __typeof((x)) x_ = (x); \ |
| !crt_isinf(x_) && !crt_isnan(x_); \ |
| })) |
| #else |
| #error "Do not know how to check for infinity" |
| #endif // __has_builtin(__builtin_isfinite) |
| #define crt_isinf(x) __builtin_isinf((x)) |
| #define crt_isnan(x) __builtin_isnan((x)) |
| #endif // _MSC_VER |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_copysign(x, y) copysign((x), (y)) |
| #define crt_copysignf(x, y) copysignf((x), (y)) |
| #define crt_copysignl(x, y) copysignl((x), (y)) |
| #else |
| #define crt_copysign(x, y) __builtin_copysign((x), (y)) |
| #define crt_copysignf(x, y) __builtin_copysignf((x), (y)) |
| #define crt_copysignl(x, y) __builtin_copysignl((x), (y)) |
| // We define __has_builtin to always return 0 for GCC versions below 10, |
| // but __builtin_copysignf128 is available since version 7. |
| #if __has_builtin(__builtin_copysignf128) || \ |
| (defined(__GNUC__) && __GNUC__ >= 7) |
| #define crt_copysignf128(x, y) __builtin_copysignf128((x), (y)) |
| #elif __has_builtin(__builtin_copysignq) |
| #define crt_copysignf128(x, y) __builtin_copysignq((x), (y)) |
| #endif |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_fabs(x) fabs((x)) |
| #define crt_fabsf(x) fabsf((x)) |
| #define crt_fabsl(x) fabs((x)) |
| #else |
| #define crt_fabs(x) __builtin_fabs((x)) |
| #define crt_fabsf(x) __builtin_fabsf((x)) |
| #define crt_fabsl(x) __builtin_fabsl((x)) |
| // We define __has_builtin to always return 0 for GCC versions below 10, |
| // but __builtin_fabsf128 is available since version 7. |
| #if __has_builtin(__builtin_fabsf128) || (defined(__GNUC__) && __GNUC__ >= 7) |
| #define crt_fabsf128(x) __builtin_fabsf128((x)) |
| #elif __has_builtin(__builtin_fabsq) |
| #define crt_fabsf128(x) __builtin_fabsq((x)) |
| #endif |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_fmaxl(x, y) __max((x), (y)) |
| #else |
| #define crt_fmaxl(x, y) __builtin_fmaxl((x), (y)) |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_logbl(x) logbl((x)) |
| #else |
| #define crt_logbl(x) __builtin_logbl((x)) |
| #endif |
| |
| #if defined(_MSC_VER) && !defined(__clang__) |
| #define crt_scalbnl(x, y) scalbnl((x), (y)) |
| #else |
| #define crt_scalbnl(x, y) __builtin_scalbnl((x), (y)) |
| #endif |
| |
| #endif // INT_MATH_H |