diff options
Diffstat (limited to 'newlib/libm/math/s_isinf.c')
| -rw-r--r-- | newlib/libm/math/s_isinf.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/newlib/libm/math/s_isinf.c b/newlib/libm/math/s_isinf.c new file mode 100644 index 00000000000..87f099566b6 --- /dev/null +++ b/newlib/libm/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 */ |