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initial check-in, version 0.5.0

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Rich Felker 2011-02-12 00:22:29 -05:00
commit 0b44a0315b
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14
src/math/__fpclassify.c Normal file
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#include <stdint.h>
#include <math.h>
int __fpclassify(double __x)
{
union {
double __d;
__uint64_t __i;
} __y = { __x };
int __ee = __y.__i>>52 & 0x7ff;
if (!__ee) return __y.__i<<1 ? FP_SUBNORMAL : FP_ZERO;
if (__ee==0x7ff) return __y.__i<<12 ? FP_NAN : FP_INFINITE;
return FP_NORMAL;
}