#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);