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The Go programming language
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Lynn Boger 6994731ec2 internal/bytealg: improve asm for memequal on ppc64x 
This includes two changes to the memequal function.

Previously the asm implementation on ppc64x for Equal called the internal
function memequal using a BL, whereas the other asm implementations for
bytes functions on ppc64x used BR. The BR is preferred because the BL
causes the calling function to stack a frame. This changes Equal so it
uses BR and is consistent with the others.

This also uses vsx instructions where possible to improve performance
of the compares for sizes over 32.

Here are results from the sizes affected:

Equal/32             8.40ns ± 0%     7.66ns ± 0%    -8.81%  (p=0.029 n=4+4)
Equal/4K              193ns ± 0%      144ns ± 0%   -25.39%  (p=0.029 n=4+4)
Equal/4M              346µs ± 0%      277µs ± 0%   -20.08%  (p=0.029 n=4+4)
Equal/64M            7.66ms ± 1%     7.27ms ± 0%    -5.10%  (p=0.029 n=4+4)

Change-Id: Ib6ee2cdc3e5d146e2705e3338858b8e965d25420
Reviewed-on: https://go-review.googlesource.com/c/143060
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com>
Reviewed-by: David Chase <drchase@google.com>
2018-10-23 19:22:44 +00:00
.github .github: use HTTPS for Stack Overflow link in SUPPORT.md 2018-06-12 11:08:14 +00:00
api syscall: FreeBSD 12 ino64 support 2018-10-05 21:38:13 +00:00
doc doc: use the new log functions 2018-10-22 19:57:05 +00:00
lib/time lib/time: update vendored tzdata to release 2018e 2018-06-11 14:47:06 +00:00
misc internal/traceparser: provide parser that uses less space and parses segments of runtime trace files 2018-10-23 14:00:14 +00:00
src internal/bytealg: improve asm for memequal on ppc64x 2018-10-23 19:22:44 +00:00
test cmd/compile: use proved bounds to remove signed division fix-ups 2018-10-23 02:29:44 +00:00
.gitattributes
.gitignore .gitignore: ignore src/cmd/dist/dist 2017-10-28 21:55:49 +00:00
AUTHORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: add VMware as author, Venil Noronha as contributor 2018-08-31 02:14:24 +00:00
favicon.ico website: recreate 16px and 32px favicon 2016-08-25 15:43:32 +00:00
LICENSE doc: revert copyright date to 2009 2016-06-01 22:40:04 +00:00
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README.md README: linkify some paths 2018-06-06 18:07:01 +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.

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

Note that the Go project uses 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.