d3b6913f6a
R=machenbach@chromium.org Review URL: https://codereview.chromium.org/22887053 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16327 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
146 lines
5.4 KiB
C++
146 lines
5.4 KiB
C++
// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include <limits>
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#include "v8.h"
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#include "cctest.h"
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#include "code-stubs.h"
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#include "test-code-stubs.h"
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#include "factory.h"
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#include "macro-assembler.h"
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#include "platform.h"
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using namespace v8::internal;
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int STDCALL ConvertDToICVersion(double d) {
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union { double d; uint32_t u[2]; } dbl;
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dbl.d = d;
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uint32_t exponent_bits = dbl.u[1];
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int32_t shifted_mask = static_cast<int32_t>(Double::kExponentMask >> 32);
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int32_t exponent = (((exponent_bits & shifted_mask) >>
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(Double::kPhysicalSignificandSize - 32)) -
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HeapNumber::kExponentBias);
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uint32_t unsigned_exponent = static_cast<uint32_t>(exponent);
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int result = 0;
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uint32_t max_exponent =
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static_cast<uint32_t>(Double::kPhysicalSignificandSize);
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if (unsigned_exponent >= max_exponent) {
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if ((exponent - Double::kPhysicalSignificandSize) < 32) {
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result = dbl.u[0] << (exponent - Double::kPhysicalSignificandSize);
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}
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} else {
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uint64_t big_result =
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(BitCast<uint64_t>(d) & Double::kSignificandMask) | Double::kHiddenBit;
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big_result = big_result >> (Double::kPhysicalSignificandSize - exponent);
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result = static_cast<uint32_t>(big_result);
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}
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if (static_cast<int32_t>(exponent_bits) < 0) {
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return (0 - result);
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} else {
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return result;
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}
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}
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void RunOneTruncationTestWithTest(ConvertDToICallWrapper callWrapper,
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ConvertDToIFunc func,
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double from,
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double raw) {
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uint64_t to = static_cast<int64_t>(raw);
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int result = (*callWrapper)(func, from);
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CHECK_EQ(static_cast<int>(to), result);
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}
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int32_t DefaultCallWrapper(ConvertDToIFunc func,
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double from) {
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return (*func)(from);
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}
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// #define NaN and Infinity so that it's possible to cut-and-paste these tests
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// directly to a .js file and run them.
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#define NaN (OS::nan_value())
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#define Infinity (std::numeric_limits<double>::infinity())
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#define RunOneTruncationTest(p1, p2) \
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RunOneTruncationTestWithTest(callWrapper, func, p1, p2)
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void RunAllTruncationTests(ConvertDToIFunc func) {
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RunAllTruncationTests(DefaultCallWrapper, func);
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}
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void RunAllTruncationTests(ConvertDToICallWrapper callWrapper,
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ConvertDToIFunc func) {
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RunOneTruncationTest(0, 0);
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RunOneTruncationTest(0.5, 0);
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RunOneTruncationTest(-0.5, 0);
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RunOneTruncationTest(1.5, 1);
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RunOneTruncationTest(-1.5, -1);
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RunOneTruncationTest(5.5, 5);
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RunOneTruncationTest(-5.0, -5);
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RunOneTruncationTest(NaN, 0);
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RunOneTruncationTest(Infinity, 0);
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RunOneTruncationTest(-NaN, 0);
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RunOneTruncationTest(-Infinity, 0);
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RunOneTruncationTest(4.5036e+15, 0x1635E000);
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RunOneTruncationTest(-4.5036e+15, -372629504);
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RunOneTruncationTest(4503603922337791.0, -1);
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RunOneTruncationTest(-4503603922337791.0, 1);
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RunOneTruncationTest(4503601774854143.0, 2147483647);
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RunOneTruncationTest(-4503601774854143.0, -2147483647);
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RunOneTruncationTest(9007207844675582.0, -2);
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RunOneTruncationTest(-9007207844675582.0, 2);
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RunOneTruncationTest(2.4178527921507624e+24, -536870912);
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RunOneTruncationTest(-2.4178527921507624e+24, 536870912);
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RunOneTruncationTest(2.417853945072267e+24, -536870912);
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RunOneTruncationTest(-2.417853945072267e+24, 536870912);
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RunOneTruncationTest(4.8357055843015248e+24, -1073741824);
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RunOneTruncationTest(-4.8357055843015248e+24, 1073741824);
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RunOneTruncationTest(4.8357078901445341e+24, -1073741824);
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RunOneTruncationTest(-4.8357078901445341e+24, 1073741824);
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RunOneTruncationTest(9.6714111686030497e+24, -2147483648.0);
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RunOneTruncationTest(-9.6714111686030497e+24, -2147483648.0);
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RunOneTruncationTest(9.6714157802890681e+24, -2147483648.0);
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RunOneTruncationTest(-9.6714157802890681e+24, -2147483648.0);
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}
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#undef NaN
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#undef Infinity
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#undef RunOneTruncationTest
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