Implement truncated d-to-i with a stub on x86

test/mjsunit/double-truncation.js

+// Copyright 2012 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
+
+function RunOneTruncationTest(a, b) {
+  var temp = a | 0;
+  assertEquals(b, temp);
+}
+
+function RunAllTruncationTests() {
+  RunOneTruncationTest(0, 0);
+  RunOneTruncationTest(0.5, 0);
+  RunOneTruncationTest(-0.5, 0);
+  RunOneTruncationTest(1.5, 1);
+  RunOneTruncationTest(-1.5, -1);
+  RunOneTruncationTest(5.5, 5);
+  RunOneTruncationTest(-5.0, -5);
+  RunOneTruncationTest(NaN, 0);
+  RunOneTruncationTest(Infinity, 0);
+  RunOneTruncationTest(-NaN, 0);
+  RunOneTruncationTest(-Infinity, 0);
+
+  RunOneTruncationTest(4.5036e+15, 0x1635E000);
+  RunOneTruncationTest(-4.5036e+15, -372629504);
+
+  RunOneTruncationTest(4503603922337791.0, -1);
+  RunOneTruncationTest(-4503603922337791.0, 1);
+  RunOneTruncationTest(4503601774854143.0, 2147483647);
+  RunOneTruncationTest(-4503601774854143.0, -2147483647);
+  RunOneTruncationTest(9007207844675582.0, -2);
+  RunOneTruncationTest(-9007207844675582.0, 2);
+
+  RunOneTruncationTest(2.4178527921507624e+24, -536870912);
+  RunOneTruncationTest(-2.4178527921507624e+24, 536870912);
+  RunOneTruncationTest(2.417853945072267e+24, -536870912);
+  RunOneTruncationTest(-2.417853945072267e+24, 536870912);
+
+  RunOneTruncationTest(4.8357055843015248e+24, -1073741824);
+  RunOneTruncationTest(-4.8357055843015248e+24, 1073741824);
+  RunOneTruncationTest(4.8357078901445341e+24, -1073741824);
+  RunOneTruncationTest(-4.8357078901445341e+24, 1073741824);
+
+  RunOneTruncationTest(9.6714111686030497e+24, -2147483648);
+  RunOneTruncationTest(-9.6714111686030497e+24, -2147483648);
+  RunOneTruncationTest(9.6714157802890681e+24, -2147483648);
+  RunOneTruncationTest(-9.6714157802890681e+24, -2147483648);
+}
+
+RunAllTruncationTests();
+RunAllTruncationTests();
+%OptimizeFunctionOnNextCall(RunOneTruncationTest);
+RunAllTruncationTests();
+RunAllTruncationTests();