source: azure_iot_hub/trunk/musl-1.1.18/src/math/__fpclassify.c@ 389

Last change on this file since 389 was 389, checked in by coas-nagasima, 5 years ago

ビルドが通るよう更新
  • Property svn:eol-style set to native
  • Property svn:mime-type set to text/x-csrc;charset=UTF-8
File size: 258 bytes
Line 
1#include <math.h>
2#include <stdint.h>
3
4int __fpclassify(double x)
5{
6 union {double f; uint64_t i;} u = {x};
7 int e = u.i>>52 & 0x7ff;
8 if (!e) return u.i<<1 ? FP_SUBNORMAL : FP_ZERO;
9 if (e==0x7ff) return u.i<<12 ? FP_NAN : FP_INFINITE;
10 return FP_NORMAL;
11}
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