mirror of https://github.com/golang/go.git
4de6687554
(x<<1 | x>>31). Fixes #5084. On the SHA3 benchmark proposals at https://golang.org/cl/7760044/ benchmark old ns/op new ns/op delta BenchmarkPermutationFunction 1288 1191 -7.53% BenchmarkSingleByteWrite 5795 5811 +0.28% BenchmarkBlockWrite512 178 179 +0.56% BenchmarkBlockWrite384 230 233 +1.30% BenchmarkBlockWrite256 282 286 +1.42% BenchmarkBlockWrite224 301 306 +1.66% BenchmarkBulkHashSHA3_512 326885 304548 -6.83% BenchmarkBulkHashSHA3_384 234839 220074 -6.29% BenchmarkBulkHashSHA3_256 186969 175790 -5.98% BenchmarkBulkHashSHA3_224 178133 167489 -5.98% For a function like func g() { x = a[3]<<20 | a[3]>>12 } the asm goes from 0006 (main.go:10) TEXT g+0(SB),$0-0 0007 (main.go:10) MOVL a+12(SB),BP 0008 (main.go:10) LOCALS ,$0 0009 (main.go:11) MOVL BP,BX 0010 (main.go:11) SHLL $20,BX 0011 (main.go:11) SHRL $12,BP 0012 (main.go:11) ORL BP,BX 0013 (main.go:11) MOVL BX,x+0(SB) 0014 (main.go:12) RET , to 0006 (main.go:10) TEXT g+0(SB),$0-0 0007 (main.go:10) LOCALS ,$0 0008 (main.go:11) MOVL a+12(SB),BX 0009 (main.go:11) ROLL $20,BX 0010 (main.go:11) MOVL BX,x+0(SB) 0011 (main.go:12) RET , R=rsc, iant, remyoudompheng CC=golang-dev, jcb https://golang.org/cl/7944043 |
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| include | ||
| lib | ||
| misc | ||
| src | ||
| test | ||
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| .hgtags | ||
| AUTHORS | ||
| CONTRIBUTORS | ||
| LICENSE | ||
| PATENTS | ||
| README | ||
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| robots.txt | ||
README
This is the source code repository for the Go programming language.
For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.
After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.
Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.
--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README). You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See doc/install.html for more details.