source: azure_iot_hub/trunk/musl-1.1.18/src/math/__signbitf.c@ 388

#include "libm.h"

// FIXME: macro in math.h
int __signbitf(float x)
{
        union {
                float f;
                uint32_t i;
        } y = { x };
        return y.i>>31;
}