dquakeplus/source/libpspmath/vfpu_powf.c

#include "pspmath.h"

float vfpu_powf(float x, float y) {
	float result;
	// result = exp2f(y * log2f(x));
	__asm__ volatile (
		"mtv      %1, S000\n"
		"mtv      %2, S001\n"
		"vlog2.s  S001, S001\n"
		"vmul.s   S000, S000, S001\n"
		"vexp2.s  S000, S000\n"
		"mfv      %0, S000\n"
	: "=r"(result) : "r"(x), "r"(y));
	return result;
}