| /** |
| * 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 |
| __isnanl (long double _x) |
| { |
| #if defined(__x86_64__) || defined(_AMD64_) |
| __mingw_fp_types_t ld; |
| int xx, signexp; |
| |
| ld.ld = &_x; |
| signexp = (ld.ldt->lh.sign_exponent & 0x7fff) << 1; |
| xx = (int) (ld.ldt->lh.low | (ld.ldt->lh.high & 0x7fffffffu)); /* explicit */ |
| signexp |= (unsigned int) (xx | (-xx)) >> 31; |
| signexp = 0xfffe - signexp; |
| return (int) ((unsigned int) signexp) >> 16; |
| #elif defined(__arm__) || defined(_ARM_) |
| return __isnan(_x); |
| #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 ("__isnanl"))) isnanl (long double); |