1 /*
2  * Written by J.T. Conklin <jtc@netbsd.org>.
3  * Public domain.
4  */
5 
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 
__isinff(float x)14 int __isinff (float x)
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 }
23 libm_hidden_def(__isinff)
24