1/**
2 * This file is part of the mingw-w64 runtime package.
3 * No warranty is given; refer to the file DISCLAIMER within this package.
4 */
5
6#include <math.h>
7
8#define __FP_SIGNBIT 0x0200
9
10
11int __signbitl (long double x) {
12#if (defined(_AMD64_) && !defined(_ARM64EC_)) || (defined(__x86_64__) && !defined(__arm64ec__))
13 __mingw_ldbl_type_t ld;
14 ld.x = x;
15 return ((ld.lh.sign_exponent & 0x8000) != 0);
16#elif defined(__arm__) || defined(_ARM_) || defined(__aarch64__) || defined(_ARM64_) || defined(__arm64ec__) || defined(_ARM64EC_)
17 return __signbit(x);
18#elif defined(__i386__) || defined(_X86_)
19 unsigned short sw;
20 __asm__ __volatile__ ("fxam; fstsw %%ax;"
21 : "=a" (sw)
22 : "t" (x) );
23 return (sw & __FP_SIGNBIT) != 0;
24#endif
25}
26
27int __attribute__ ((alias ("__signbitl"))) signbitl (long double);