newlib-cygwin/newlib/libm/common/s_isinfd.c

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/*
* __isinfd(x) returns 1 if x is infinity, else 0;
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* no branching!
* Added by Cygnus Support.
*/
#include "fdlibm.h"
#ifndef _DOUBLE_IS_32BITS
int
_DEFUN (__isinfd, (x),
double x)
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{
__int32_t hx,lx;
EXTRACT_WORDS(hx,lx,x);
hx &= 0x7fffffff;
hx |= (__uint32_t)(lx|(-lx))>>31;
hx = 0x7ff00000 - hx;
return 1 - (int)((__uint32_t)(hx|(-hx))>>31);
}
#endif /* _DOUBLE_IS_32BITS */