source: azure_iot_hub/trunk/musl-1.1.18/src/math/copysign.c@ 388

Last change on this file since 388 was 388, checked in by coas-nagasima, 5 years ago

Azure IoT Hub Device C SDK を使ったサンプルの追加
  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
  • Property svn:mime-type set to text/x-csrc
File size: 164 bytes
Line 
1#include "libm.h"
2
3double copysign(double x, double y) {
4 union {double f; uint64_t i;} ux={x}, uy={y};
5 ux.i &= -1ULL/2;
6 ux.i |= uy.i & 1ULL<<63;
7 return ux.f;
8}
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