7bbd0bfe51
R=bmeurer@chromium.org, clemensh@chromium.org, jkummerow@chromium.org, sigurds@chromium.org, ulan@chromium.org, verwaest@chromium.org Bug: v8:9247 Change-Id: I153a6bbfc55989fe7a86c052f95c5cb8ee61e841 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1613244 Commit-Queue: Yang Guo <yangguo@chromium.org> Auto-Submit: Yang Guo <yangguo@chromium.org> Reviewed-by: Sigurd Schneider <sigurds@chromium.org> Reviewed-by: Jakob Kummerow <jkummerow@chromium.org> Reviewed-by: Clemens Hammacher <clemensh@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#61557}
95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
// Copyright 2006-2008 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.
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "src/v8.h"
|
|
|
|
#include "src/base/platform/platform.h"
|
|
#include "src/numbers/diy-fp.h"
|
|
#include "test/cctest/cctest.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
TEST(Subtract) {
|
|
DiyFp diy_fp1 = DiyFp(3, 0);
|
|
DiyFp diy_fp2 = DiyFp(1, 0);
|
|
DiyFp diff = DiyFp::Minus(diy_fp1, diy_fp2);
|
|
|
|
CHECK_EQ(2, diff.f());
|
|
CHECK_EQ(0, diff.e());
|
|
diy_fp1.Subtract(diy_fp2);
|
|
CHECK_EQ(2, diy_fp1.f());
|
|
CHECK_EQ(0, diy_fp1.e());
|
|
}
|
|
|
|
|
|
TEST(Multiply) {
|
|
DiyFp diy_fp1 = DiyFp(3, 0);
|
|
DiyFp diy_fp2 = DiyFp(2, 0);
|
|
DiyFp product = DiyFp::Times(diy_fp1, diy_fp2);
|
|
|
|
CHECK_EQ(0, product.f());
|
|
CHECK_EQ(64, product.e());
|
|
diy_fp1.Multiply(diy_fp2);
|
|
CHECK_EQ(0, diy_fp1.f());
|
|
CHECK_EQ(64, diy_fp1.e());
|
|
|
|
diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000000), 11);
|
|
diy_fp2 = DiyFp(2, 13);
|
|
product = DiyFp::Times(diy_fp1, diy_fp2);
|
|
CHECK_EQ(1, product.f());
|
|
CHECK_EQ(11 + 13 + 64, product.e());
|
|
|
|
// Test rounding.
|
|
diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x80000000, 00000001), 11);
|
|
diy_fp2 = DiyFp(1, 13);
|
|
product = DiyFp::Times(diy_fp1, diy_fp2);
|
|
CHECK_EQ(1, product.f());
|
|
CHECK_EQ(11 + 13 + 64, product.e());
|
|
|
|
diy_fp1 = DiyFp(V8_2PART_UINT64_C(0x7FFFFFFF, FFFFFFFF), 11);
|
|
diy_fp2 = DiyFp(1, 13);
|
|
product = DiyFp::Times(diy_fp1, diy_fp2);
|
|
CHECK_EQ(0, product.f());
|
|
CHECK_EQ(11 + 13 + 64, product.e());
|
|
|
|
// Halfway cases are allowed to round either way. So don't check for it.
|
|
|
|
// Big numbers.
|
|
diy_fp1 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 11);
|
|
diy_fp2 = DiyFp(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFF), 13);
|
|
// 128bit result: 0xFFFFFFFFFFFFFFFE0000000000000001
|
|
product = DiyFp::Times(diy_fp1, diy_fp2);
|
|
CHECK(V8_2PART_UINT64_C(0xFFFFFFFF, FFFFFFFE) == product.f());
|
|
CHECK_EQ(11 + 13 + 64, product.e());
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|