newlib-cygwin/newlib/libm/math/sf_isinf.c

34 lines
453 B
C

/*
* isinff(x) returns 1 if x is +-infinity, else 0;
* Added by Cygnus Support.
*/
#include "fdlibm.h"
#ifdef __STDC__
int isinff(float x)
#else
int isinff(x)
float x;
#endif
{
__int32_t ix;
GET_FLOAT_WORD(ix,x);
ix &= 0x7fffffff;
return FLT_UWORD_IS_INFINITE(ix);
}
#ifdef _DOUBLE_IS_32BITS
#ifdef __STDC__
int isinf(double x)
#else
int isinf(x)
double x;
#endif
{
return isinff((float) x);
}
#endif /* defined(_DOUBLE_IS_32BITS) */