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Dash - Reinventing Cryptocurrency
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Wladimir J. van der Laan 16240f43a5
Merge #10821: Add SSE4 optimized SHA256 
6b8d872 Protect SSE4 code behind a compile-time flag (Pieter Wuille)
fa9be90 Add selftest for SHA256 transform (Pieter Wuille)
c1ccb15 Add SSE4 based SHA256 (Pieter Wuille)
2991c91 Add SHA256 dispatcher (Pieter Wuille)
4d50f38 Support multi-block SHA256 transforms (Pieter Wuille)

Pull request description:

  This adds an SSE4 assembly version of the SHA256 transform by Intel, and uses it at run time if SSE4 instructions are available, and use a fallback C++ implementation otherwise. Nearly every x86_64 CPU supports SSE4. The feature is only enabled when compiled with `--enable-experimental-asm`.

  In order to avoid build dependencies and other complications, the original Intel YASM code was translated to GCC extended asm syntax.

  This gives around a 50% speedup on the SHA256 benchmark for me.

  It is based on an earlier patch by @laanwj, though only includes a single assembly version (for now), and removes the YASM dependency.

Tree-SHA512: d31c50695ceb45264291537b93c0d7497670be38edf021ca5402eaa7d4e1e0e1ae492326e28d4e93979d066168129e62d1825e0384b1b906d36f85d93dfcb43c
2017-07-20 20:28:35 +02:00
.github Mention reporting security issues responsibly 2016-11-10 14:41:40 +01:00
.tx qt: Set transifex slug to 0.14 2017-01-02 09:36:03 +01:00
build-aux/m4 Explicitly search for bdb5.3. 2017-07-02 02:48:00 +00:00
contrib Merge #10786: Add PR description to merge commit in github-merge.py 2017-07-11 15:40:08 +02:00
depends [depends] expat 2.2.1 2017-06-19 12:49:32 +08:00
doc REST/RPC example update 2017-06-30 13:21:08 +02:00
share Slightly overhaul NSI pixmaps 2017-06-22 21:40:48 +02:00
src Merge #10821: Add SSE4 optimized SHA256 2017-07-20 20:28:35 +02:00
test Merge #10571: [RPC]Move transaction combining from signrawtransaction to new RPC 2017-07-20 16:42:27 +02:00
.gitattributes
.gitignore Use shared config file for functional and util tests 2017-05-03 14:18:30 -04:00
.travis.yml [test] don't run dbcrash.py on Travis 2017-07-04 17:27:46 +01:00
autogen.sh
configure.ac Protect SSE4 code behind a compile-time flag 2017-07-20 09:03:53 -07:00
CONTRIBUTING.md [doc] Add blob about finding reviewers. 2017-04-17 22:48:28 +09:00
COPYING [Trivial] Update license year range to 2017 2017-01-23 23:46:06 +01:00
INSTALL.md Update INSTALL landing redirection notice for build instructions. 2016-10-06 12:27:23 +13:00
libbitcoinconsensus.pc.in
Makefile.am Filter subtrees and and benchmarks from coverage report 2017-06-12 15:53:30 -07:00
README.md Squashed 'src/leveldb/' changes from a31c8aa40..196962ff0 2017-06-09 19:24:30 -07:00

README.md

Bitcoin Core integration/staging tree

Build Status

https://bitcoincore.org

What is Bitcoin?

Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency.

For more information, as well as an immediately useable, binary version of the Bitcoin Core software, see https://bitcoin.org/en/download, or read the original whitepaper.

License

Bitcoin Core is released under the terms of the MIT license. See COPYING for more information or see https://opensource.org/licenses/MIT.

Development Process

The master branch is regularly built and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Bitcoin Core.

The contribution workflow is described in CONTRIBUTING.md.

The developer mailing list should be used to discuss complicated or controversial changes before working on a patch set.

Developer IRC can be found on Freenode at #bitcoin-core-dev.

Testing

Testing and code review is the bottleneck for development; we get more pull requests than we can review and test on short notice. Please be patient and help out by testing other people's pull requests, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code. Unit tests can be compiled and run (assuming they weren't disabled in configure) with: make check. Further details on running and extending unit tests can be found in /src/test/README.md.

There are also regression and integration tests, written in Python, that are run automatically on the build server. These tests can be run (if the test dependencies are installed) with: test/functional/test_runner.py

The Travis CI system makes sure that every pull request is built for Windows, Linux, and OS X, and that unit/sanity tests are run automatically.

Manual Quality Assurance (QA) Testing

Changes should be tested by somebody other than the developer who wrote the code. This is especially important for large or high-risk changes. It is useful to add a test plan to the pull request description if testing the changes is not straightforward.

Translations

Changes to translations as well as new translations can be submitted to Bitcoin Core's Transifex page.

Translations are periodically pulled from Transifex and merged into the git repository. See the translation process for details on how this works.

Important: We do not accept translation changes as GitHub pull requests because the next pull from Transifex would automatically overwrite them again.

Translators should also subscribe to the mailing list.