Samir Jindel
927b0cb9ed
Improves MD5 performance on ARM32 by 15%, from 1.25s to 1.05s. Cq-Include-Trybots: luci.dart.try:vm-kernel-optcounter-threshold-linux-release-x64-try, vm-kernel-precomp-linux-debug-x64-try, vm-kernel-precomp-linux-release-simarm-try, vm-kernel-precomp-linux-release-simarm64-try, vm-kernel-precomp-linux-release-x64-try, vm-kernel-precomp-mac-release-simarm64-try, vm-kernel-precomp-win-release-x64-try Change-Id: Ia7a0614da662a80db051362fff7a4acacbc2455f Reviewed-on: https://dart-review.googlesource.com/c/88723 Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
46 lines
1.1 KiB
Dart
46 lines
1.1 KiB
Dart
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// VMOptions=--no_background_compilation --optimization_counter_threshold=10
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import "package:expect/expect.dart";
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// Tests for long bit-not under 64-bit arithmetic wrap-around semantics.
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final int maxInt32 = 2147483647;
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final int minInt32 = -2147483648;
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final int maxInt64 = 0x7fffffffffffffff;
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final int minInt64 = 0x8000000000000000;
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int bitnot(int x) {
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return ~x;
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}
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doConstant() {
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Expect.equals(0, bitnot(-1));
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Expect.equals(-1, bitnot(0));
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Expect.equals(-2, bitnot(1));
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Expect.equals(minInt32, bitnot(maxInt32));
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Expect.equals(maxInt32, bitnot(minInt32));
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Expect.equals(minInt64, bitnot(maxInt64));
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Expect.equals(maxInt64, bitnot(minInt64)); // sic!
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}
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doVar() {
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int d = 0;
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for (int i = -88; i < 10; i++) {
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d += bitnot(i);
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}
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Expect.equals(3773, d);
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}
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main() {
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// Repeat tests to enter JIT (when applicable).
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for (int i = 0; i < 20; i++) {
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doConstant();
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doVar();
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}
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}
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