Implement support for Math.imul in Crankshaft.

test/mjsunit/math-imul.js

Index: test/mjsunit/math-imul.js
diff --git a/test/mjsunit/math-imul.js b/test/mjsunit/math-imul.js
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+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --max-opt-count=1000
+
+var imul_func = Math.imul;
+function imul_polyfill(a, b) {
+  var ah  = (a >>> 16) & 0xffff;
+  var al = a & 0xffff;
+  var bh  = (b >>> 16) & 0xffff;
+  var bl = b & 0xffff;
+  return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0) | 0);
+}
+
+function TestMathImul(expected, a, b) {
+  function imul_meth_closure(a, b) { return Math.imul(a, b); }
+  function imul_func_closure(a, b) { return imul_func(a, b); }
+
+  // Test reference implementation.
+  assertEquals(expected, imul_polyfill(a, b));
+
+  // Test direct method call.
+  assertEquals(expected, Math.imul(a, b));
+
+  // Test direct function call.
+  assertEquals(expected, imul_func(a, b));
+
+  // Test optimized method call inside closure.
+  assertEquals(expected, imul_meth_closure(a, b));
+  assertEquals(expected, imul_meth_closure(a, b));
+  %OptimizeFunctionOnNextCall(imul_meth_closure);
+  assertEquals(expected, imul_meth_closure(a, b));
+
+  // Test optimized function call inside closure.
+  assertEquals(expected, imul_func_closure(a, b));
+  assertEquals(expected, imul_func_closure(a, b));
+  %OptimizeFunctionOnNextCall(imul_func_closure);
+  assertEquals(expected, imul_func_closure(a, b));
+
+  // Deoptimize closures and forget type feedback.
+  %DeoptimizeFunction(imul_meth_closure);
+  %DeoptimizeFunction(imul_func_closure);
+  %ClearFunctionTypeFeedback(imul_meth_closure);
+  %ClearFunctionTypeFeedback(imul_func_closure);
+}
+
+TestMathImul(8, 2, 4);
+TestMathImul(-8, -1, 8);
+TestMathImul(4, -2, -2);
+TestMathImul(-5, 0xffffffff, 5);
+TestMathImul(-10, 0xfffffffe, 5);
+
+TestMathImul(0, false, 7);
+TestMathImul(0, 7, false);
+TestMathImul(0, false, false);
+
+TestMathImul(7, true, 7);
+TestMathImul(7, 7, true);
+TestMathImul(1, true, true);
+
+TestMathImul(0, false, true);
+TestMathImul(0, true, false);
+
+TestMathImul(0, undefined, 7);
+TestMathImul(0, 7, undefined);
+TestMathImul(0, undefined, undefined);
+
+TestMathImul(0, -0, 7);
+TestMathImul(0, 7, -0);
+
+TestMathImul(0, 0.1, 7);
+TestMathImul(0, 7, 0.1);
+TestMathImul(0, 0.9, 7);
+TestMathImul(0, 7, 0.9);
+TestMathImul(7, 1.1, 7);
+TestMathImul(7, 7, 1.1);
+TestMathImul(7, 1.9, 7);
+TestMathImul(7, 7, 1.9);
+
+TestMathImul(0, "str", 7);
+TestMathImul(0, 7, "str");
+
+TestMathImul(0, {}, 7);
+TestMathImul(0, 7, {});
+
+TestMathImul(0, [], 7);
+TestMathImul(0, 7, []);
+
+// 2^30 is a smi boundary on arm and ia32.
+var two_30 = 1 << 30;
+
+TestMathImul(-two_30, two_30, 7);
+TestMathImul(-two_30, 7, two_30);
+TestMathImul(0, two_30, two_30);
+
+TestMathImul(two_30, -two_30, 7);
+TestMathImul(two_30, 7, -two_30);
+TestMathImul(0, -two_30, -two_30);
+
+// 2^31 is a smi boundary on x64.
+var two_31 = 2 * two_30;
+
+TestMathImul(-two_31, two_31, 7);
+TestMathImul(-two_31, 7, two_31);
+TestMathImul(0, two_31, two_31);
+
+TestMathImul(-two_31, -two_31, 7);
+TestMathImul(-two_31, 7, -two_31);
+TestMathImul(0, -two_31, -two_31);
+
+// 2^31 - 1 is the largest int32 value.
+var max_val = two_31 - 1;
+
+TestMathImul(two_31 - 7, max_val, 7);
+TestMathImul(two_31 - 7, 7, max_val);
+TestMathImul(1, max_val, max_val);
+
+// 2^16 is a boundary value that overflows when squared.
+var two_16 = 1 << 16;
+
+TestMathImul(0, two_16, two_16);
+TestMathImul(-two_16, two_16 - 1, two_16);
+TestMathImul(-two_16, two_16, two_16 - 1);
+TestMathImul(-2 * two_16 + 1, two_16 - 1, two_16 - 1);