v8/test/mjsunit/double-truncation.js
danno@chromium.org 48b65f8cd5 Implement truncated d-to-i as a stub on x86
- Added a general DoubleToIStub so that it's possible to extend to other platforms and non-truncating case.
- This version handles all cases of truncation (previous code deopted in some cases) and all source/destination register combinations without clobbering any temps.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/18612005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15645 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-07-12 12:28:32 +00:00

79 lines
3.3 KiB
JavaScript

// 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();