Finally created good test cases, shrunk bitwise code a bit, updated infinite corner cases for or.js, and still having precision problems.

decimal.js

@@ -831,6 +831,7 @@
      *  n | 0 = n
      *  n | n = n
      *  I | n = I
+     *  I | -n = -1
      *  I | I = I
      *  -I | n = -I
      *  -I | -I = -I
@@ -843,8 +844,9 @@
         var Decimal = this['constructor'],
             n = new Decimal(n);
 
-        if (this && n && (!this['c'] || !n['c'])) {
-            if (!this['c'] && !n['c']) {
+        if (this && n && this['s'] && n['s'] && (!this['c'] || !n['c'])) {
+            if ((!this['c'] && this['s'] > 0 && n['lt'](0)) || (this['lt'](0) && n['s'] > 0 && !n['c']) ||
+                    this['eq'](-1) || n['eq'](-1)) {
                 return new Decimal(-1);
             }
             return new Decimal(this['c'] ? n : this);
@@ -2049,49 +2051,49 @@
             return new Decimal(NaN);
         }
 
-        var xBits, yBits, tmpExternal = external;
+        var tmpExternal = external;
         external = false;
-        if (x['s'] < 0) {
-            xBits = '1' + x['not']()['toString'](2).replace(/[01]/g, function (d) { return +!+d });
+
+        var xBits, yBits,
+            xTrunc = x['trunc'](),
+            yTrunc = y['trunc'](),
+            xLtZero = xTrunc['lt'](0),
+            yLtZero = yTrunc['lt'](0);
+
+        if (xLtZero) {
+            xBits = '1' + xTrunc['not']()['toString'](2).replace(/[01]/g, function (d) { return +!+d });
         } else {
-            xBits = '0' + x['trunc']()['toString'](2);
+            xBits = '0' + xTrunc['toString'](2);
         }
 
-        if (y['s'] < 0) {
-            yBits = '1' + y['not']()['toString'](2).replace(/[01]/g, function (d) { return +!+d });
+        if (yLtZero) {
+            yBits = '1' + yTrunc['not']()['toString'](2).replace(/[01]/g, function (d) { return +!+d });
         } else {
-            yBits = '0' + y['trunc']()['toString'](2);
+            yBits = '0' + yTrunc['toString'](2);
         }
-        external = tmpExternal;
 
         if (xBits.length > yBits.length) {
-            yBits = yBits.padLeft((y['s'] < 0) ? '1' : '0', xBits.length);
+            yBits = yBits.padLeft(yLtZero ? '1' : '0', xBits.length);
         } else if (xBits.length < yBits.length) {
-            xBits = xBits.padLeft((x['s'] < 0) ? '1' : '0', yBits.length);
+            xBits = xBits.padLeft(xLtZero ? '1' : '0', yBits.length);
         }
 
-
         var outVal = new Decimal(0);
         var twoPower = Decimal['ONE'];
-        if (func(xBits[0], yBits[0]) == 0) {
+        var expFuncVal = func(xBits[0], yBits[0]) ^ 1;
         for (var i = xBits.length - 1; i > 0; --i) {
-                if (func(xBits[i], yBits[i])) {
+            if (func(xBits[i], yBits[i]) == expFuncVal) {
                 outVal = outVal['plus'](twoPower);
             }
             twoPower = twoPower['times'](2);
         }
+        if (expFuncVal == 0) {
+            outVal = outVal['plus'](Decimal['ONE'])['neg']();
+        }
+        external = tmpExternal;
         return outVal;
     }
 
-        for (var i = xBits.length - 1; i > 0; --i) {
-            if (func(xBits[i], yBits[i]) == 0) {
-                outVal = outVal['plus'](twoPower['plus'](Decimal['ONE']));
-            }
-            twoPower = twoPower['times'](2);
-        }
-        return outVal['plus'](Decimal['ONE'])['neg']();
-    }
-
     function coefficientToString(a) {
         var s, z,
             i = 1,

test/or.py

@@ -0,0 +1,208 @@
+import random
+from decimal import *
+
+header_str = """var count = (function plus(Decimal) {
+    var start = +new Date(),
+        log,
+        error,
+        undefined,
+        passed = 0,
+        total = 0,
+        n = 'null',
+        N = 'NaN',
+        I = 'Infinity';
+
+    if (typeof window === 'undefined') {
+        log = console.log;
+        error = console.error;
+    } else {
+        log = function (str) { document.body.innerHTML += str.replace('\\n', '<br>') };
+        error = function (str) { document.body.innerHTML += '<div style="color: red">' +
+          str.replace('\\n', '<br>') + '</div>' };
+    }
+
+    if (!Decimal && typeof require === 'function') Decimal = require('../decimal');
+
+    function assert(expected, actual) {
+        total++;
+        if (expected !== actual) {
+           error('\\n Test number: ' + total + ' failed');
+           error(' Expected: ' + expected);
+           error(' Actual:   ' + actual);
+           //process.exit();
+        } else {
+            passed++;
+            //log('\\n Expected and actual: ' + actual);
+        }
+    }
+
+    function T(orendA, orendB, expected, sd, rm) {
+
+        if ( sd != null ) {
+            Decimal.precision = sd;
+            Decimal.rounding = rm;
+        }
+        assert(String(expected), String(new Decimal(orendA).or(orendB)));
+    }
+
+    log('\\n Testing or...');
+
+    Decimal.config({
+        precision: 20,
+        rounding: 4,
+        toExpNeg: -9e15,
+        toExpPos: 9e15,
+        minE: -9e15,
+        maxE: 9e15,
+        errors: false
+    });
+
+    T(1, 0, 1);
+    T(1, -0, 1);
+    T(-1, 0, -1);
+    T(-1, -0, -1);
+    T(1, N, N);
+    T(-1, N, N);
+    T(1, I, I);
+    T(1, -I, -I);
+    T(-1, I, -1);
+    T(-1, -I, -1);
+    T(0, 1, 1);
+    T(0, -1, -1);
+    T(-0, 1, 1);
+    T(-0, -1, -1);
+
+    T(0, N, N);
+    T(-0, N, N);
+    T(0, I, I);
+    T(0, -I, -I);
+    T(-0, I, I);
+    T(-0, -I, -I);
+    T(N, 1, N);
+    T(N, -1, N);
+    T(N, 0, N);
+    T(N, -0, N);
+    T(N, N, N);
+    T(N, I, N);
+    T(N, -I, N);
+    T(I, 1, I);
+    T(I, -1, -1);
+    T(-I, 1, -I);
+    T(-I, -1, -1);
+    T(I, 0, I);
+    T(I, -0, I);
+    T(-I, 0, -I);
+    T(-I, -0, -I);
+    T(I, N, N);
+    T(-I, N, N);
+    T(I, I, I);
+    T(I, -I, -1);
+    T(-I, I, -1);
+    T(-I, -I, -I);
+
+    T(1, '0', '1');
+    T(1, '1', '1');
+    T(1, '-45', '-45');
+    T(1, '22', '23');
+    T(1, '0144', '145');
+    T(1, '6.1915', '7');
+    T(1, '-1.02', '-1');
+
+"""
+
+modes = [
+'ROUND_UP',
+'ROUND_DOWN',
+'ROUND_CEILING',
+'ROUND_FLOOR',
+'ROUND_HALF_UP',
+'ROUND_HALF_DOWN',
+'ROUND_HALF_EVEN',
+'ROUND_05UP'
+]
+
+def getRand(i,d):
+    return Decimal('%d.%0*d' % (random.randint(0, 10**i-1), d, random.randint(0, 10**d-1)))
+
+def getRandExp(max_digits=20, max_exp=3):
+    s = '' if random.randint(1, 2) == 1 else '-'
+    s += str(random.randint(1, 9)) + '.'
+
+    for i in range(random.randint(0, max_digits - 1)):
+        s += str(random.randint(0, 9))
+
+    s += 'e-' if random.randint(1, 4) == 1 else 'e+'
+
+    for i in range(random.randint(1, max_exp)):
+        s += str(random.randint(0, 9))
+
+    try:
+        d = Decimal(s)
+    except Exception, e:
+        d = getRandExp(max_digits, max_exp)
+
+    return d
+
+def sci_str(dec):
+    return ('{:.' + str(len(str(dec)) - 1) + 'e}').format(dec)
+
+file = open('or.js', 'w')
+file.write(header_str + '\n')
+
+
+ctx = getcontext()
+ctx.Emax = 9000000000000000
+ctx.Emin = -9000000000000000
+max = Decimal('9.9e+300')
+min = Decimal('-9.9e300')
+i = 0
+biggest = Decimal('0')
+
+while i < 200000:
+    x = getRandExp()
+    y = getRandExp()
+
+    if ((x < min or x > max or x == Decimal('0')) or
+            (y < min or y > max or y == Decimal('0'))):
+        continue
+
+    # Maximum precision of result.
+    pr = random.randint(1, 100)
+
+    # Rounding mode
+    rm = random.randint(0, 6)
+    result_rm = modes[rm]
+
+    ctx.prec = pr
+    ctx.rounding = result_rm
+
+    try:
+        result = Decimal(int(x) | int(y))
+    except Exception, e:
+        print(e.message)
+        print( str(i) + ':  sqrt(' + str(x) + ')' )
+        continue
+
+    if result < min or result > max or result == Decimal('0') or result == Decimal('1'):
+        continue
+
+    result = ( "    T('" + str(x) + "', '" + str(y) + "', '" + str(result) + "', " + str(pr) + ", " + str(rm) + ");\n" )
+
+    if x > biggest:
+        biggest = x
+
+    if i % 100 == 0:
+        print(i)
+
+    file.write(result)
+    #print(result)
+
+    i += 1
+
+print('biggest: ' + sci_str(biggest))
+file.write("""
+    log('\\n ' + passed + ' of ' + total + ' tests passed in ' + (+new Date() - start) + ' ms \\n');
+    return [passed, total];
+})(this.Decimal);
+if (typeof module !== 'undefined' && module.exports) module.exports = count;""")
+file.close()