Subversion Repositories planix.SVN

#include "os.h"

#include <mp.h>

#include "dat.h"

int

mpvectscmp(mpdigit *a, int alen, mpdigit *b, int blen)

{

	mpdigit x, y, z, v;

	int m, p;

	if(alen > blen){

		v = 0;

		while(alen > blen)

			v |= a[--alen];

		m = p = (-v^v|v)>>Dbits-1;

	} else if(blen > alen){

		v = 0;

		while(blen > alen)

			v |= b[--blen];

		m = (-v^v|v)>>Dbits-1;

		p = m^1;

	} else

		m = p = 0;

	while(alen-- > 0){

		x = a[alen];

		y = b[alen];

		z = x - y;

		x = ~x;

		v = ((-z^z|z)>>Dbits-1) & ~m;

		p = ((~(x&y|x&z|y&z)>>Dbits-1) & v) | (p & ~v);

		m |= v;

	}

	return (p-m) | m;

}