v8/test/mjsunit/double-intrinsics.js

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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax
function assertDoubleBits(hi, lo, x) {
hi = hi | 0;
lo = lo | 0;
assertEquals(x, %_ConstructDouble(hi, lo));
assertEquals(hi, %_DoubleHi(x));
assertEquals(lo, %_DoubleLo(x));
assertEquals(x, %_ConstructDouble(%_DoubleHi(x), %_DoubleLo(x)));
}
var tests = [0x7ff00000, 0x00000000, Infinity,
0xfff00000, 0x00000000, -Infinity,
0x80000000, 0x00000000, -0,
0x400921fb, 0x54442d18, Math.PI,
0xc00921fb, 0x54442d18, -Math.PI,
0x4005bf0a, 0x8b145769, Math.E,
0xc005bf0a, 0x8b145769, -Math.E,
0xbfe80000, 0x00000000, -0.75];
for (var i = 0; i < tests.length; i += 3) {
assertDoubleBits(tests[i], tests[i + 1], tests[i + 2]);
}
%OptimizeFunctionOnNextCall(assertDoubleBits);
for (var i = 0; i < tests.length; i += 3) {
assertDoubleBits(tests[i], tests[i + 1], tests[i + 2]);
assertOptimized(assertDoubleBits);
}