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lib: Add libm_dbl, a double-precision math library, from musl-1.1.16.

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Damien George
2017-06-23 15:52:00 +10:00
parent 409fc8f9c1
commit 045116551e
43 changed files with 3743 additions and 0 deletions
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11
lib/libm_dbl/__fpclassify.c Normal file
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@@ -0,0 +1,11 @@
#include <math.h>
#include <stdint.h>
int __fpclassifyd(double x)
{
union {double f; uint64_t i;} u = {x};
int e = u.i>>52 & 0x7ff;
if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO;
if (e==0x7ff) return u.i<<12 ? FP_NAN : FP_INFINITE;
return FP_NORMAL;
}