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#define CRT_INFINITY __builtin_huge_valf() 29 30#define crt_isinf(x) __builtin_isinf((x)) 31#define crt_isnan(x) __builtin_isnan((x)) 32 33/* Define crt_isfinite in terms of the builtin if available, otherwise provide 34 * an alternate version in terms of our other functions. This supports some 35 * versions of GCC which didn't have __builtin_isfinite. 36 */ 37#if __has_builtin(__builtin_isfinite) 38# define crt_isfinite(x) __builtin_isfinite((x)) 39#else 40# define crt_isfinite(x) \ 41 __extension__(({ \ 42 __typeof((x)) x_ = (x); \ 43 !crt_isinf(x_) && !crt_isnan(x_); \ 44 })) 45#endif 46 47#define crt_copysign(x, y) __builtin_copysign((x), (y)) 48#define crt_copysignf(x, y) __builtin_copysignf((x), (y)) 49#define crt_copysignl(x, y) __builtin_copysignl((x), (y)) 50 51#define crt_fabs(x) __builtin_fabs((x)) 52#define crt_fabsf(x) __builtin_fabsf((x)) 53#define crt_fabsl(x) __builtin_fabsl((x)) 54 55#define crt_fmax(x, y) __builtin_fmax((x), (y)) 56#define crt_fmaxf(x, y) __builtin_fmaxf((x), (y)) 57#define crt_fmaxl(x, y) __builtin_fmaxl((x), (y)) 58 59#define crt_logb(x) __builtin_logb((x)) 60#define crt_logbf(x) __builtin_logbf((x)) 61#define crt_logbl(x) __builtin_logbl((x)) 62 63#define crt_scalbn(x, y) __builtin_scalbn((x), (y)) 64#define crt_scalbnf(x, y) __builtin_scalbnf((x), (y)) 65#define crt_scalbnl(x, y) __builtin_scalbnl((x), (y)) 66 67#endif /* INT_MATH_H */ 68