michael@0: // Copyright 2009 the Sputnik authors.  All rights reserved.
michael@0: // This code is governed by the BSD license found in the LICENSE file.
michael@0: 
michael@0: /**
michael@0:  * The result of a floating-point multiplication is governed by the rules of IEEE 754 double-precision arithmetics
michael@0:  *
michael@0:  * @path ch11/11.5/11.5.1/S11.5.1_A4_T2.js
michael@0:  * @description The sign of the result is positive if both operands have the same sign, negative if the operands have different signs
michael@0:  */
michael@0: 
michael@0: //CHECK#1
michael@0: if (1 * 1 !== 1) {
michael@0:   $ERROR('#1: 1 * 1 === 1. Actual: ' + (1 * 1));
michael@0: }
michael@0: 
michael@0: //CHECK#2
michael@0: if (1 * -1 !== -1) {
michael@0:   $ERROR('#2: 1 * -1 === -1. Actual: ' + (1 * -1));
michael@0: }
michael@0: 
michael@0: //CHECK#3
michael@0: if (-1 * 1 !== -1) {
michael@0:   $ERROR('#3: -1 * 1 === -1. Actual: ' + (-1 * 1));
michael@0: }
michael@0: 
michael@0: //CHECK#4
michael@0: if (-1 * -1 !== 1) {
michael@0:   $ERROR('#4: -1 * -1 === 1. Actual: ' + (-1 * -1));
michael@0: }
michael@0: 
michael@0: //CHECK#5
michael@0: if (0 * 0 !== 0) {
michael@0:   $ERROR('#5.1: 0 * 0 === 0. Actual: ' + (0 * 0));
michael@0: } else {
michael@0:   if (1 / (0 * 0) !== Number.POSITIVE_INFINITY) {
michael@0:     $ERROR('#5.2: 0 * 0 === + 0. Actual: -0');
michael@0:   }
michael@0: }
michael@0: 
michael@0: //CHECK#6
michael@0: if (0 * -0 !== -0) {
michael@0:   $ERROR('#6.1: 0 * -0 === 0. Actual: ' + (0 * -0));
michael@0: } else {
michael@0:   if (1 / (0 * -0) !== Number.NEGATIVE_INFINITY) {
michael@0:     $ERROR('#6.2: 0 * -0 === - 0. Actual: +0');
michael@0:   }
michael@0: }
michael@0: 
michael@0: //CHECK#7
michael@0: if (-0 * 0 !== -0) {
michael@0:   $ERROR('#7.1: -0 * 0 === 0. Actual: ' + (-0 * 0));
michael@0: } else {
michael@0:   if (1 / (-0 * 0) !== Number.NEGATIVE_INFINITY) {
michael@0:     $ERROR('#7.2: -0 * 0 === - 0. Actual: +0');
michael@0:   }
michael@0: }
michael@0: 
michael@0: //CHECK#8
michael@0: if (-0 * -0 !== 0) {
michael@0:   $ERROR('#8.1: -0 * -0 === 0. Actual: ' + (-0 * -0));
michael@0: } else {
michael@0:   if (1 / (-0 * -0) !== Number.POSITIVE_INFINITY) {
michael@0:     $ERROR('#8.2: 0 * -0 === - 0. Actual: +0');
michael@0:   }
michael@0: }
michael@0: