git: 9front

ref: b03ae0993b8b96e340e560f9f649fc6c8b2b8081
dir: /sys/src/cmd/python/Python/hypot.c/

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/* hypot() replacement */

#include "pyconfig.h"
#include "pyport.h"

double hypot(double x, double y)
{
	double yx;

	x = fabs(x);
	y = fabs(y);
	if (x < y) {
		double temp = x;
		x = y;
		y = temp;
	}
	if (x == 0.)
		return 0.;
	else {
		yx = y/x;
		return x*sqrt(1.+yx*yx);
	}
}