0,0 → 1,37 |
/* |
* isinff(x) returns 1 if x is +-infinity, else 0; |
* |
* isinf is a <math.h> macro in the C99 standard. It was previously |
* implemented as isinf and isinff functions by newlib and are still declared |
* as such in <ieeefp.h>. Newlib supplies it here as a function if the user |
* chooses to use <ieeefp.h> or needs to link older code compiled with the |
* previous <math.h> declaration. |
*/ |
|
#include "fdlibm.h" |
#include <ieeefp.h> |
|
#undef isinff |
|
int |
_DEFUN (isinff, (x), |
float x) |
{ |
__int32_t ix; |
GET_FLOAT_WORD(ix,x); |
ix &= 0x7fffffff; |
return FLT_UWORD_IS_INFINITE(ix); |
} |
|
#ifdef _DOUBLE_IS_32BITS |
|
#undef isinf |
|
int |
_DEFUN (isinf, (x), |
double x) |
{ |
return isinff((float) x); |
} |
|
#endif /* defined(_DOUBLE_IS_32BITS) */ |