// SPDX-License-Identifier: GPL-2.0-only
/* IEEE754 floating point arithmetic
 * double precision: common utilities
 */
/*
 * MIPS floating point support
 * Copyright (C) 1994-2000 Algorithmics Ltd.
 */

#include "ieee754dp.h"

int ieee754dp_cmp(union ieee754dp x, union ieee754dp y, int cmp, int sig)
{
        s64 vx;
        s64 vy;

        COMPXDP;
        COMPYDP;

        EXPLODEXDP;
        EXPLODEYDP;
        FLUSHXDP;
        FLUSHYDP;
        ieee754_clearcx();      /* Even clear inexact flag here */

        if (ieee754_class_nan(xc) || ieee754_class_nan(yc)) {
                if (sig ||
                    xc == IEEE754_CLASS_SNAN || yc == IEEE754_CLASS_SNAN)
                        ieee754_setcx(IEEE754_INVALID_OPERATION);
                return (cmp & IEEE754_CUN) != 0;
        } else {
                vx = x.bits;
                vy = y.bits;

                if (vx < 0)
                        vx = -vx ^ DP_SIGN_BIT;
                if (vy < 0)
                        vy = -vy ^ DP_SIGN_BIT;

                if (vx < vy)
                        return (cmp & IEEE754_CLT) != 0;
                else if (vx == vy)
                        return (cmp & IEEE754_CEQ) != 0;
                else
                        return (cmp & IEEE754_CGT) != 0;
        }
}