| 0,0 → 1,47 |
|---|
| /* sf_c_isnan.c -- float version of s_c_isnan.c. |
| */ |
| |
| /* |
| * ==================================================== |
| * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| * |
| * Developed at SunPro, a Sun Microsystems, Inc. business. |
| * Permission to use, copy, modify, and distribute this |
| * software is freely granted, provided that this notice |
| * is preserved. |
| * ==================================================== |
| */ |
| |
| /* |
| * isnanf(x) returns 1 is x is nan, else 0; |
| * |
| * isnanf is an extension declared in <ieeefp.h>. |
| */ |
| |
| #include "fdlibm.h" |
| #include <ieeefp.h> |
| |
| #undef isnanf |
| |
| int |
| _DEFUN (isnanf, (x), |
| float x) |
| { |
| __int32_t ix; |
| GET_FLOAT_WORD(ix,x); |
| ix &= 0x7fffffff; |
| return FLT_UWORD_IS_NAN(ix); |
| } |
| |
| #ifdef _DOUBLE_IS_32BITS |
| |
| #undef isnan |
| |
| int |
| _DEFUN (isnan, (x), |
| double x) |
| { |
| return isnanf((float) x); |
| } |
| |
| #endif /* defined(_DOUBLE_IS_32BITS) */ |