circuitpython/lib/libm_dbl/thumb_vfp_sqrt.c

11 lines
256 B
C

// an implementation of sqrt for Thumb using hardware double-precision VFP instructions
double sqrt(double x) {
double ret;
__asm__ volatile (
"vsqrt.f64 %P0, %P1\n"
: "=w" (ret)
: "w" (x));
return ret;
}