| 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) */ |