glibc/sysdeps/ieee754/flt-32/s_isinf_nsf.c

21 lines
308 B
C

/*
* Written by Ulrich Drepper <drepper@gmail.com>.
*/
/*
* __isinf_nsf(x) returns != 0 if x is ±inf, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
#undef __isinf_nsf
int
__isinf_nsf (float x)
{
int32_t ix;
GET_FLOAT_WORD(ix,x);
return (ix & 0x7fffffff) == 0x7f800000;
}