fabs.c\arm\math\src - musl - musl - an implementation of the standard library for Linux-based systems

#include <math.h>
#if __ARM_PCS_VFP && __ARM_FP&8
double fabs(double x)
{
	__asm__ ("vabs.f64 %P0, %P1" : "=w"(x) : "w"(x));
	return x;
}
#else
#include "../fabs.c"
#endif