fusl/src/math/arm/fabs.c

#include <math.h>

#if __ARM_PCS_VFP

double fabs(double x) {
  __asm__("vabs.f64 %P0, %P1" : "=w"(x) : "w"(x));
  return x;
}

#else

#include "../fabs.c"

#endif