kolibrios/contrib/sdk/sources/newlib/math/s_isinfd.c
Sergey Semyonov (Serge) 754f9336f0 upload sdk
git-svn-id: svn://kolibrios.org@4349 a494cfbc-eb01-0410-851d-a64ba20cac60
2013-12-15 08:09:20 +00:00

24 lines
394 B
C

/*
* __isinfd(x) returns 1 if x is infinity, else 0;
* no branching!
* Added by Cygnus Support.
*/
#include "fdlibm.h"
#ifndef _DOUBLE_IS_32BITS
int
_DEFUN (__isinfd, (x),
double x)
{
__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 */