diff options
Diffstat (limited to 'compiler-rt/lib/int_math.h')
| -rw-r--r-- | compiler-rt/lib/int_math.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/compiler-rt/lib/int_math.h b/compiler-rt/lib/int_math.h index b472f1a962e..d6b4bdae162 100644 --- a/compiler-rt/lib/int_math.h +++ b/compiler-rt/lib/int_math.h @@ -21,12 +21,29 @@ #ifndef INT_MATH_H #define INT_MATH_H +#ifndef __has_builtin +# define __has_builtin(x) 0 +#endif + #define CRT_INFINITY __builtin_huge_valf() -#define crt_isfinite(x) __builtin_isfinite((x)) #define crt_isinf(x) __builtin_isinf((x)) #define crt_isnan(x) __builtin_isnan((x)) +/* 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)) +#else +# define crt_isfinite(x) \ + __extension__(({ \ + __typeof((x)) x_ = (x); \ + !crt_isinf(x_) && !crt_isnan(x_); \ + })) +#endif + #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)) |
