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lib/int_math: Some versions of GCC don't provide __builtin_isfinite. Support

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them.

llvm-svn: 144810
This commit is contained in:
Daniel Dunbar
2011-11-16 18:56:55 +00:00
parent 960d55e9ff
commit 82f9c199e8
1 changed files with 18 additions and 1 deletions
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19
compiler-rt/lib/int_math.h
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@@ -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))