10f6151d7e
This reverts commit 9701d4a420.
Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Mac64/40802/overview
Original change's description:
> [base] Move most of src/numbers into base
>
> Moves all but conversions.*, hash-seed-inl.h and math-random.* into
> base, in preparation for moving the parts of conversions that don't
> access HeapObjects.
>
> Also moves uc16 and uc32 out of commons/globals.h into base/strings.h.
>
> Bug: v8:11917
> Change-Id: Ife359148bb0961a63833aff40d26331454b6afb6
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2979595
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
> Auto-Submit: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#75354}
Bug: v8:11917
Change-Id: Iacf796c95256016fa74f0a910c5bb1a86baa425a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2982605
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#75356}
230 lines
9.0 KiB
C++
230 lines
9.0 KiB
C++
// Copyright 2006-2008 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 "src/init/v8.h"
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#include "src/base/platform/platform.h"
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#include "src/numbers/diy-fp.h"
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#include "src/numbers/double.h"
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#include "test/cctest/cctest.h"
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namespace v8 {
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namespace internal {
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TEST(Uint64Conversions) {
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// Start by checking the byte-order.
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uint64_t ordered = 0x0123'4567'89AB'CDEF;
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CHECK_EQ(3512700564088504e-318, Double(ordered).value());
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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CHECK_EQ(5e-324, Double(min_double64).value());
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uint64_t max_double64 = 0x7FEF'FFFF'FFFF'FFFF;
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CHECK_EQ(1.7976931348623157e308, Double(max_double64).value());
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}
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TEST(AsDiyFp) {
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uint64_t ordered = 0x0123'4567'89AB'CDEF;
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DiyFp diy_fp = Double(ordered).AsDiyFp();
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CHECK_EQ(0x12 - 0x3FF - 52, diy_fp.e());
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// The 52 mantissa bits, plus the implicit 1 in bit 52 as a UINT64.
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CHECK(0x0013'4567'89AB'CDEF == diy_fp.f()); // NOLINT
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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diy_fp = Double(min_double64).AsDiyFp();
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CHECK_EQ(-0x3FF - 52 + 1, diy_fp.e());
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// This is a denormal; so no hidden bit.
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CHECK_EQ(1, diy_fp.f());
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uint64_t max_double64 = 0x7FEF'FFFF'FFFF'FFFF;
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diy_fp = Double(max_double64).AsDiyFp();
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CHECK_EQ(0x7FE - 0x3FF - 52, diy_fp.e());
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CHECK(0x001F'FFFF'FFFF'FFFF == diy_fp.f()); // NOLINT
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}
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TEST(AsNormalizedDiyFp) {
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uint64_t ordered = 0x0123'4567'89AB'CDEF;
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DiyFp diy_fp = Double(ordered).AsNormalizedDiyFp();
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CHECK_EQ(0x12 - 0x3FF - 52 - 11, diy_fp.e());
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CHECK((uint64_t{0x0013'4567'89AB'CDEF} << 11) == diy_fp.f()); // NOLINT
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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diy_fp = Double(min_double64).AsNormalizedDiyFp();
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CHECK_EQ(-0x3FF - 52 + 1 - 63, diy_fp.e());
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// This is a denormal; so no hidden bit.
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CHECK(0x8000'0000'0000'0000 == diy_fp.f()); // NOLINT
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uint64_t max_double64 = 0x7FEF'FFFF'FFFF'FFFF;
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diy_fp = Double(max_double64).AsNormalizedDiyFp();
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CHECK_EQ(0x7FE - 0x3FF - 52 - 11, diy_fp.e());
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CHECK((uint64_t{0x001F'FFFF'FFFF'FFFF} << 11) == diy_fp.f());
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}
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TEST(IsDenormal) {
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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CHECK(Double(min_double64).IsDenormal());
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uint64_t bits = 0x000F'FFFF'FFFF'FFFF;
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CHECK(Double(bits).IsDenormal());
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bits = 0x0010'0000'0000'0000;
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CHECK(!Double(bits).IsDenormal());
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}
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TEST(IsSpecial) {
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CHECK(Double(V8_INFINITY).IsSpecial());
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CHECK(Double(-V8_INFINITY).IsSpecial());
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CHECK(Double(std::numeric_limits<double>::quiet_NaN()).IsSpecial());
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uint64_t bits = 0xFFF1'2345'0000'0000;
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CHECK(Double(bits).IsSpecial());
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// Denormals are not special:
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CHECK(!Double(5e-324).IsSpecial());
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CHECK(!Double(-5e-324).IsSpecial());
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// And some random numbers:
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CHECK(!Double(0.0).IsSpecial());
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CHECK(!Double(-0.0).IsSpecial());
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CHECK(!Double(1.0).IsSpecial());
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CHECK(!Double(-1.0).IsSpecial());
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CHECK(!Double(1000000.0).IsSpecial());
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CHECK(!Double(-1000000.0).IsSpecial());
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CHECK(!Double(1e23).IsSpecial());
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CHECK(!Double(-1e23).IsSpecial());
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CHECK(!Double(1.7976931348623157e308).IsSpecial());
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CHECK(!Double(-1.7976931348623157e308).IsSpecial());
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}
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TEST(IsInfinite) {
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CHECK(Double(V8_INFINITY).IsInfinite());
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CHECK(Double(-V8_INFINITY).IsInfinite());
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CHECK(!Double(std::numeric_limits<double>::quiet_NaN()).IsInfinite());
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CHECK(!Double(0.0).IsInfinite());
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CHECK(!Double(-0.0).IsInfinite());
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CHECK(!Double(1.0).IsInfinite());
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CHECK(!Double(-1.0).IsInfinite());
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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CHECK(!Double(min_double64).IsInfinite());
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}
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TEST(Sign) {
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CHECK_EQ(1, Double(1.0).Sign());
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CHECK_EQ(1, Double(V8_INFINITY).Sign());
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CHECK_EQ(-1, Double(-V8_INFINITY).Sign());
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CHECK_EQ(1, Double(0.0).Sign());
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CHECK_EQ(-1, Double(-0.0).Sign());
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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CHECK_EQ(1, Double(min_double64).Sign());
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}
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TEST(NormalizedBoundaries) {
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DiyFp boundary_plus;
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DiyFp boundary_minus;
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DiyFp diy_fp = Double(1.5).AsNormalizedDiyFp();
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Double(1.5).NormalizedBoundaries(&boundary_minus, &boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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// 1.5 does not have a significand of the form 2^p (for some p).
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// Therefore its boundaries are at the same distance.
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CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
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CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
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diy_fp = Double(1.0).AsNormalizedDiyFp();
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Double(1.0).NormalizedBoundaries(&boundary_minus, &boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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// 1.0 does have a significand of the form 2^p (for some p).
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// Therefore its lower boundary is twice as close as the upper boundary.
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CHECK_GT(boundary_plus.f() - diy_fp.f(), diy_fp.f() - boundary_minus.f());
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CHECK((1 << 9) == diy_fp.f() - boundary_minus.f());
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CHECK((1 << 10) == boundary_plus.f() - diy_fp.f());
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uint64_t min_double64 = 0x0000'0000'0000'0001;
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diy_fp = Double(min_double64).AsNormalizedDiyFp();
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Double(min_double64).NormalizedBoundaries(&boundary_minus, &boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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// min-value does not have a significand of the form 2^p (for some p).
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// Therefore its boundaries are at the same distance.
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CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
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// Denormals have their boundaries much closer.
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CHECK((static_cast<uint64_t>(1) << 62) == diy_fp.f() - boundary_minus.f());
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uint64_t smallest_normal64 = 0x0010'0000'0000'0000;
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diy_fp = Double(smallest_normal64).AsNormalizedDiyFp();
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Double(smallest_normal64).NormalizedBoundaries(&boundary_minus,
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&boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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// Even though the significand is of the form 2^p (for some p), its boundaries
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// are at the same distance. (This is the only exception).
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CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
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CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
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uint64_t largest_denormal64 = 0x000F'FFFF'FFFF'FFFF;
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diy_fp = Double(largest_denormal64).AsNormalizedDiyFp();
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Double(largest_denormal64).NormalizedBoundaries(&boundary_minus,
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&boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
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CHECK((1 << 11) == diy_fp.f() - boundary_minus.f());
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uint64_t max_double64 = 0x7FEF'FFFF'FFFF'FFFF;
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diy_fp = Double(max_double64).AsNormalizedDiyFp();
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Double(max_double64).NormalizedBoundaries(&boundary_minus, &boundary_plus);
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CHECK_EQ(diy_fp.e(), boundary_minus.e());
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CHECK_EQ(diy_fp.e(), boundary_plus.e());
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// max-value does not have a significand of the form 2^p (for some p).
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// Therefore its boundaries are at the same distance.
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CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
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CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
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}
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TEST(NextDouble) {
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CHECK_EQ(4e-324, Double(0.0).NextDouble());
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CHECK_EQ(0.0, Double(-0.0).NextDouble());
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CHECK_EQ(-0.0, Double(-4e-324).NextDouble());
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Double d0(-4e-324);
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Double d1(d0.NextDouble());
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Double d2(d1.NextDouble());
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CHECK_EQ(-0.0, d1.value());
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CHECK_EQ(0.0, d2.value());
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CHECK_EQ(4e-324, d2.NextDouble());
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CHECK_EQ(-1.7976931348623157e308, Double(-V8_INFINITY).NextDouble());
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CHECK_EQ(V8_INFINITY, Double(uint64_t{0x7FEF'FFFF'FFFF'FFFF}).NextDouble());
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}
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} // namespace internal
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} // namespace v8
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