diff options
| author | Marcus Huderle <huderlem@gmail.com> | 2017-12-27 16:22:00 -0600 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-12-27 16:22:00 -0600 |
| commit | 6b611a3046a694d3972f2aa4df90d3ef78801217 (patch) | |
| tree | 05f295c00cbbc1d5987a05da37e746fb841d4d83 /libc/math/s_isinf.c | |
| parent | 58c860d6c48324eba66dd19540db5584d832cf58 (diff) | |
| parent | d88495e3f4061a411e654c7307aa94ac8a98c94b (diff) | |
Merge pull request #13 from ProjectRevoTPP/libc
add libc building to agbcc.
Diffstat (limited to 'libc/math/s_isinf.c')
| -rw-r--r-- | libc/math/s_isinf.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libc/math/s_isinf.c b/libc/math/s_isinf.c new file mode 100644 index 0000000..87f0995 --- /dev/null +++ b/libc/math/s_isinf.c @@ -0,0 +1,26 @@ +/* + * isinf(x) returns 1 if x is infinity, else 0; + * no branching! + * Added by Cygnus Support. + */ + +#include "fdlibm.h" + +#ifndef _DOUBLE_IS_32BITS + +#ifdef __STDC__ + int isinf(double x) +#else + int isinf(x) + double x; +#endif +{ + __int32_t hx,lx; + EXTRACT_WORDS(hx,lx,x); + hx &= 0x7fffffff; + hx |= (__uint32_t)(lx|(-lx))>>31; + hx = 0x7ff00000 - hx; + return 1 - (int)((__uint32_t)(hx|(-hx))>>31); +} + +#endif /* _DOUBLE_IS_32BITS */ |