blob: f82277eed9e60c16398605f0d8131d85f8d21ca0 [file] [log] [blame]
/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <math.h>
int
__isnanf (float _x)
{
#if defined(__x86_64__) || defined(_AMD64_) || defined(__arm__) || defined(_ARM_)
__mingw_flt_type_t hlp;
int i;
hlp.x = _x;
i = hlp.val & 0x7fffffff;
i = 0x7f800000 - i;
return (int) (((unsigned int) i) >> 31);
#elif defined(__i386__) || defined(_X86_)
unsigned short _sw;
__asm__ __volatile__ ("fxam;"
"fstsw %%ax": "=a" (_sw) : "t" (_x) );
return (_sw & (FP_NAN | FP_NORMAL | FP_INFINITE | FP_ZERO | FP_SUBNORMAL))
== FP_NAN;
#endif
}
int __attribute__ ((alias ("__isnanf"))) isnanf (float);