kolibrios-fun/programs/develop/libraries/newlib/math/signbitf.c
Sergey Semyonov (Serge) 2336060a0c newlib: update
git-svn-id: svn://kolibrios.org@1906 a494cfbc-eb01-0410-851d-a64ba20cac60
2011-03-11 18:52:24 +00:00

11 lines
250 B
C

#define __FP_SIGNBIT 0x0200
int __signbitf (float x) {
unsigned short sw;
__asm__ ("fxam; fstsw %%ax;"
: "=a" (sw)
: "t" (x) );
return (sw & __FP_SIGNBIT) != 0;
}
int __attribute__ ((alias ("__signbitf"))) signbitf (float);