16e8dc257e
1) double.truncate() now simply calls toInt(), omitting truncateToDouble() call. 2) double.floor() and ceil() are now intrinsified on arm64 and AOT/x64 and generated using DoubleToInteger instruction. 3) DoubleToInteger instruction is extended to support floor and ceil. On arm64 DoubleToInteger is implemented using fcvtms and fcvtps instructions. On x64 DoubleToInteger is implemented using roundsd under a check if it is supported (with a fallback to a stub and a runtime call). AOT/x64: Before: BenchFloor(RunTime): 318.82148549569655 us. After: BenchFloor(RunTime): 133.29430189936687 us. TEST=ci Closes https://github.com/dart-lang/sdk/issues/46876 Closes https://github.com/dart-lang/sdk/issues/46650 Change-Id: I16ca18faf97954f8e8e25f0b72a2bbfac5bdc672 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/212381 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Slava Egorov <vegorov@google.com> |
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Dart
A client-optimized language for fast apps on any platform
Dart is:
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Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
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Productive: Make changes iteratively: use hot reload to see the result instantly in your running app.
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Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.
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Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).
License & patents
Dart is free and open source.
See LICENSE and PATENT_GRANT.
Using Dart
Visit dart.dev to learn more about the language, tools, and to find codelabs.
Browse pub.dev for more packages and libraries contributed by the community and the Dart team.
Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).
Building Dart
If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.
There are more documents on our wiki.
Contributing to Dart
The easiest way to contribute to Dart is to file issues.
You can also contribute patches, as described in Contributing.