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b6cd22c277
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Lynn Boger b6cd22c277 hash/crc32: improve performance for ppc64le 
This change improves the performance of crc32 for ppc64le by using
vpmsum and other vector instructions in the algorithm.

The testcase was updated to test more sizes.

Fixes #19570

BenchmarkCRC32/poly=IEEE/size=15/align=0-8             90.5          81.8          -9.61%
BenchmarkCRC32/poly=IEEE/size=15/align=1-8             89.7          81.7          -8.92%
BenchmarkCRC32/poly=IEEE/size=40/align=0-8             93.2          61.1          -34.44%
BenchmarkCRC32/poly=IEEE/size=40/align=1-8             92.8          60.9          -34.38%
BenchmarkCRC32/poly=IEEE/size=512/align=0-8            501           55.8          -88.86%
BenchmarkCRC32/poly=IEEE/size=512/align=1-8            502           132           -73.71%
BenchmarkCRC32/poly=IEEE/size=1kB/align=0-8            947           69.9          -92.62%
BenchmarkCRC32/poly=IEEE/size=1kB/align=1-8            946           144           -84.78%
BenchmarkCRC32/poly=IEEE/size=4kB/align=0-8            3602          186           -94.84%
BenchmarkCRC32/poly=IEEE/size=4kB/align=1-8            3603          263           -92.70%
BenchmarkCRC32/poly=IEEE/size=32kB/align=0-8           28404         1338          -95.29%
BenchmarkCRC32/poly=IEEE/size=32kB/align=1-8           28856         1405          -95.13%
BenchmarkCRC32/poly=Castagnoli/size=15/align=0-8       89.7          81.8          -8.81%
BenchmarkCRC32/poly=Castagnoli/size=15/align=1-8       89.8          81.9          -8.80%
BenchmarkCRC32/poly=Castagnoli/size=40/align=0-8       93.8          61.4          -34.54%
BenchmarkCRC32/poly=Castagnoli/size=40/align=1-8       94.3          61.3          -34.99%
BenchmarkCRC32/poly=Castagnoli/size=512/align=0-8      503           56.4          -88.79%
BenchmarkCRC32/poly=Castagnoli/size=512/align=1-8      502           132           -73.71%
BenchmarkCRC32/poly=Castagnoli/size=1kB/align=0-8      941           70.2          -92.54%
BenchmarkCRC32/poly=Castagnoli/size=1kB/align=1-8      943           145           -84.62%
BenchmarkCRC32/poly=Castagnoli/size=4kB/align=0-8      3588          186           -94.82%
BenchmarkCRC32/poly=Castagnoli/size=4kB/align=1-8      3595          264           -92.66%
BenchmarkCRC32/poly=Castagnoli/size=32kB/align=0-8     28266         1323          -95.32%
BenchmarkCRC32/poly=Castagnoli/size=32kB/align=1-8     28344         1404          -95.05%

Change-Id: Ic4d8274c66e0e87bfba5f609f508a3877aee6bb5
Reviewed-on: https://go-review.googlesource.com/38184
Reviewed-by: David Chase <drchase@google.com>
2017-03-17 12:28:57 +00:00
.github doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
api math/big: define Word as uint instead of uintptr 2017-02-21 19:31:40 +00:00
doc doc: reorganize the contribution guidelines into a guide 2017-03-16 21:43:32 +00:00
lib/time *.bash: always use the same string equality operator 2017-03-14 21:46:31 +00:00
misc *.bash: always use the same string equality operator 2017-03-14 21:46:31 +00:00
src hash/crc32: improve performance for ppc64le 2017-03-17 12:28:57 +00:00
test cmd/compile: eliminate "assignment count mismatch" - not needed anymore 2017-03-17 00:31:35 +00:00
.gitattributes
.gitignore cmd/dist: move cmd/go z files to cmd/go/internal/cfg 2017-02-03 20:30:52 +00:00
AUTHORS A+C: automated update 2016-12-21 03:22:22 +00:00
CONTRIBUTING.md doc: improve issue template and contribution guidelines 2017-02-11 20:42:06 +00:00
CONTRIBUTORS A+C: automated update 2016-12-21 03:22:22 +00:00
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LICENSE
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README.md readme: add attribution for the Gopher image 2017-02-03 19:39:41 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

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After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

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If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

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Go is the work of hundreds of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project does not use GitHub pull requests, and that we use the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.