mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-26 20:51:11 +00:00
29 lines
510 B
C
29 lines
510 B
C
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*/
|
|
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
|
static char rcsid[] = "$NetBSD: s_isinff.c,v 1.3 1995/05/11 23:20:21 jtc Exp $";
|
|
#endif
|
|
|
|
/*
|
|
* isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
|
|
* no branching!
|
|
*/
|
|
|
|
#include "math.h"
|
|
#include "math_private.h"
|
|
|
|
int
|
|
__isinff (float x)
|
|
{
|
|
int32_t ix,t;
|
|
GET_FLOAT_WORD(ix,x);
|
|
t = ix & 0x7fffffff;
|
|
t ^= 0x7f800000;
|
|
t |= -t;
|
|
return ~(t >> 31) & (ix >> 30);
|
|
}
|
|
weak_alias (__isinff, isinff)
|