include/elf.h: sync with GNU C library
[uclibc-ng.git] / libm / s_isinff.c
blob6727f0464c5fbaf9cb446589d49c247403109527
1 /*
2 * Written by J.T. Conklin <jtc@netbsd.org>.
3 * Public domain.
4 */
6 /*
7 * isinff(x) returns 1 if x is inf, -1 if x is -inf, else 0;
8 * no branching!
9 */
11 #include "math.h"
12 #include "math_private.h"
14 int __isinff (float x)
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);
23 libm_hidden_def(__isinff)