diff options
Diffstat (limited to 'winsup/mingw/mingwex/signbit.c')
| -rw-r--r-- | winsup/mingw/mingwex/signbit.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/signbit.c b/winsup/mingw/mingwex/signbit.c new file mode 100644 index 000000000..7f86c86a3 --- /dev/null +++ b/winsup/mingw/mingwex/signbit.c @@ -0,0 +1,13 @@ +#define __FP_SIGNBIT 0x0200 + +int __signbit (double x) { + unsigned short sw; + __asm__ ("fxam; fstsw %%ax;" + : "=a" (sw) + : "t" (x) ); + return sw & __FP_SIGNBIT; +} + +#undef signbit +int __attribute__ ((alias ("__signbit"))) signbit (double); + |