[uclibc-ng.git] / libm / s_isinff.c

/*
 * Written by J.T. Conklin <[email protected]>.
 * Public domain.
 */

/*
 * 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);
}
libm_hidden_def(__isinff)
Commit	Line	Data
0e05d982 BRF	1	/*
	2	* Written by J.T. Conklin <[email protected]>.
	3	* Public domain.
	4	*/
	5
0e05d982 BRF	6	/*
	7	* isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
	8	* no branching!
	9	*/
	10
	11	#include "math.h"
	12	#include "math_private.h"
	13
38b7304e	14	int __isinff (float x)
0e05d982 BRF	15	{
	16	int32_t ix,t;
	17	GET_FLOAT_WORD(ix,x);
	18	t = ix & 0x7fffffff;
	19	t ^= 0x7f800000;
	20	t \|= -t;
	21	return ~(t >> 31) & (ix >> 30);
	22	}
40b8158b	23	libm_hidden_def(__isinff)