| #include "SDL_internal.h" | |
| /* | |
| * Written by J.T. Conklin <jtc@netbsd.org>. | |
| * Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>. | |
| * Public domain. | |
| */ | |
| /* | |
| * isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0; | |
| * no branching! | |
| */ | |
| #include "math.h" | |
| #include "math_private.h" | |
| int __isinf(double x) | |
| { | |
| int32_t hx,lx; | |
| EXTRACT_WORDS(hx,lx,x); | |
| lx |= (hx & 0x7fffffff) ^ 0x7ff00000; | |
| lx |= -lx; | |
| return ~(lx >> 31) & (hx >> 30); | |
| } | |
| libm_hidden_def(__isinf) |