mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
The Go programming language
62,557 Commits 63 Branches 451 Tags 660 MiB
Go 94.3%
Assembly 5.3%
C 0.2%
Shell 0.1%
Go to file
Xiaolin Zhao b143c98169 cmd/compile: simplify bounded shift on loong64 
Use the shiftIsBounded function to generate more efficient shift instructions.
This change also optimize shift ops when the shift value is v&63 and v&31.

goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A6000-HV @ 2500.00MHz
                |  CL 627855   |               this CL                |
                |    sec/op    |    sec/op     vs base                |
LeadingZeros      1.1005n ± 0%   0.8425n ± 1%  -23.44% (p=0.000 n=10)
LeadingZeros8      1.502n ± 0%    1.501n ± 0%   -0.07% (p=0.001 n=10)
LeadingZeros16     1.502n ± 0%    1.501n ± 0%   -0.07% (p=0.000 n=10)
LeadingZeros32    0.9511n ± 0%   0.8050n ± 0%  -15.36% (p=0.000 n=10)
LeadingZeros64    1.1195n ± 0%   0.8423n ± 0%  -24.76% (p=0.000 n=10)
TrailingZeros     0.8086n ± 0%   0.8005n ± 0%   -1.00% (p=0.000 n=10)
TrailingZeros8     1.031n ± 1%    1.035n ± 1%        ~ (p=0.136 n=10)
TrailingZeros16   0.8114n ± 0%   0.8254n ± 1%   +1.73% (p=0.000 n=10)
TrailingZeros32   0.8090n ± 0%   0.8005n ± 0%   -1.05% (p=0.000 n=10)
TrailingZeros64   0.8089n ± 1%   0.8005n ± 0%   -1.04% (p=0.000 n=10)
OnesCount         0.8677n ± 0%   1.2010n ± 0%  +38.41% (p=0.000 n=10)
OnesCount8        0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.000 n=10)
OnesCount16       0.9344n ± 0%   1.2010n ± 0%  +28.53% (p=0.000 n=10)
OnesCount32       0.8677n ± 0%   1.2010n ± 0%  +38.41% (p=0.000 n=10)
OnesCount64       1.2010n ± 0%   0.8671n ± 0%  -27.80% (p=0.000 n=10)
RotateLeft        0.8009n ± 0%   0.6671n ± 0%  -16.71% (p=0.000 n=10)
RotateLeft8        1.202n ± 0%    1.327n ± 0%  +10.40% (p=0.000 n=10)
RotateLeft16      0.8036n ± 0%   0.8218n ± 0%   +2.26% (p=0.000 n=10)
RotateLeft32      0.6674n ± 0%   0.8004n ± 0%  +19.94% (p=0.000 n=10)
RotateLeft64      0.6674n ± 0%   0.8004n ± 0%  +19.94% (p=0.000 n=10)
Reverse           0.4067n ± 1%   0.4122n ± 1%   +1.38% (p=0.001 n=10)
Reverse8          0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.000 n=10)
Reverse16         0.8009n ± 0%   0.8005n ± 0%   -0.05% (p=0.000 n=10)
Reverse32         0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.001 n=10)
Reverse64         0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.008 n=10)
ReverseBytes      0.4057n ± 1%   0.4133n ± 1%   +1.90% (p=0.000 n=10)
ReverseBytes16    0.8009n ± 0%   0.8004n ± 0%   -0.07% (p=0.000 n=10)
ReverseBytes32    0.8009n ± 0%   0.8005n ± 0%   -0.05% (p=0.000 n=10)
ReverseBytes64    0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.000 n=10)
Add                1.201n ± 0%    1.201n ± 0%        ~ (p=1.000 n=10)
Add32              1.201n ± 0%    1.201n ± 0%        ~ (p=0.474 n=10)
Add64              1.201n ± 0%    1.201n ± 0%        ~ (p=1.000 n=10)
Add64multiple      1.832n ± 0%    1.828n ± 0%   -0.22% (p=0.001 n=10)
Sub                1.201n ± 0%    1.201n ± 0%        ~ (p=1.000 n=10)
Sub32              1.602n ± 0%    1.601n ± 0%   -0.06% (p=0.000 n=10)
Sub64              1.201n ± 0%    1.201n ± 0%        ~ (p=0.474 n=10)
Sub64multiple      2.402n ± 0%    2.400n ± 0%   -0.10% (p=0.000 n=10)
Mul               0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.000 n=10)
Mul32             0.8009n ± 0%   0.8004n ± 0%   -0.06% (p=0.000 n=10)
Mul64             0.8008n ± 0%   0.8004n ± 0%   -0.05% (p=0.000 n=10)
Div                9.083n ± 0%    7.638n ± 0%  -15.91% (p=0.000 n=10)
Div32              4.011n ± 0%    4.009n ± 0%   -0.05% (p=0.000 n=10)
Div64              9.711n ± 0%    8.204n ± 0%  -15.51% (p=0.000 n=10)
geomean            1.083n         1.078n        -0.40%

goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A5000 @ 2500.00MHz
                |  CL 627855   |               this CL                |
                |    sec/op    |    sec/op     vs base                |
LeadingZeros       1.341n ± 4%    1.331n ± 2%   -0.71% (p=0.008 n=10)
LeadingZeros8      1.781n ± 0%    1.766n ± 1%   -0.84% (p=0.011 n=10)
LeadingZeros16     1.782n ± 0%    1.767n ± 0%   -0.79% (p=0.001 n=10)
LeadingZeros32     1.341n ± 1%    1.333n ± 0%   -0.52% (p=0.001 n=10)
LeadingZeros64     1.338n ± 0%    1.333n ± 0%   -0.37% (p=0.008 n=10)
TrailingZeros     0.9025n ± 0%   0.8077n ± 0%  -10.50% (p=0.000 n=10)
TrailingZeros8     1.056n ± 0%    1.089n ± 1%   +3.17% (p=0.001 n=10)
TrailingZeros16    1.101n ± 0%    1.102n ± 0%   +0.09% (p=0.011 n=10)
TrailingZeros32   0.9024n ± 1%   0.8083n ± 0%  -10.43% (p=0.000 n=10)
TrailingZeros64   0.9028n ± 1%   0.8087n ± 0%  -10.43% (p=0.000 n=10)
OnesCount          1.482n ± 1%    1.302n ± 0%  -12.15% (p=0.000 n=10)
OnesCount8         1.206n ± 0%    1.207n ± 2%   +0.12% (p=0.000 n=10)
OnesCount16        1.534n ± 0%    1.402n ± 0%   -8.58% (p=0.000 n=10)
OnesCount32        1.531n ± 1%    1.302n ± 0%  -14.99% (p=0.000 n=10)
OnesCount64        1.302n ± 0%    1.538n ± 1%  +18.16% (p=0.000 n=10)
RotateLeft        0.8083n ± 0%   0.8087n ± 1%        ~ (p=0.579 n=10)
RotateLeft8        1.310n ± 0%    1.323n ± 0%   +0.95% (p=0.001 n=10)
RotateLeft16       1.149n ± 0%    1.165n ± 1%   +1.35% (p=0.001 n=10)
RotateLeft32      0.8093n ± 0%   0.8105n ± 0%        ~ (p=0.393 n=10)
RotateLeft64      0.8088n ± 0%   0.8090n ± 0%        ~ (p=0.739 n=10)
Reverse           0.5109n ± 0%   0.5172n ± 1%   +1.25% (p=0.000 n=10)
Reverse8          0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.000 n=10)
Reverse16         0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.002 n=10)
Reverse32         0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.000 n=10)
Reverse64         0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.005 n=10)
ReverseBytes      0.5122n ± 2%   0.5182n ± 1%        ~ (p=0.060 n=10)
ReverseBytes16    0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.005 n=10)
ReverseBytes32    0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.005 n=10)
ReverseBytes64    0.8010n ± 0%   0.8011n ± 0%   +0.01% (p=0.001 n=10)
Add                1.201n ± 4%    1.202n ± 0%   +0.08% (p=0.028 n=10)
Add32              1.201n ± 0%    1.202n ± 2%   +0.08% (p=0.014 n=10)
Add64              1.201n ± 1%    1.202n ± 0%   +0.08% (p=0.025 n=10)
Add64multiple      1.902n ± 0%    1.913n ± 0%   +0.55% (p=0.004 n=10)
Sub                1.201n ± 0%    1.202n ± 3%   +0.08% (p=0.001 n=10)
Sub32              1.654n ± 0%    1.656n ± 1%        ~ (p=0.117 n=10)
Sub64              1.201n ± 0%    1.202n ± 0%   +0.08% (p=0.001 n=10)
Sub64multiple      2.180n ± 4%    2.159n ± 1%   -0.96% (p=0.006 n=10)
Mul               0.9345n ± 0%   0.9346n ± 0%   +0.01% (p=0.000 n=10)
Mul32              1.030n ± 0%    1.050n ± 1%   +1.94% (p=0.000 n=10)
Mul64             0.9345n ± 0%   0.9346n ± 1%   +0.01% (p=0.000 n=10)
Div                11.57n ± 1%    11.12n ± 0%   -3.85% (p=0.000 n=10)
Div32              4.337n ± 1%    4.341n ± 1%        ~ (p=0.286 n=10)
Div64              12.76n ± 0%    12.02n ± 3%   -5.80% (p=0.000 n=10)
geomean            1.252n         1.235n        -1.32%

Change-Id: Iec4cfd2b83bb0f946068c1d657369ff081d95b04
Reviewed-on: https://go-review.googlesource.com/c/go/+/628575
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: David Chase <drchase@google.com>
 		2025-03-12 18:18:03 -07:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api mime/multipart: add helper to build content-disposition header contents 2025-03-12 16:20:01 -07:00
doc mime/multipart: add helper to build content-disposition header contents 2025-03-12 16:20:01 -07:00
lib lib/time: build with Ubuntu backward compatibility options 2025-02-06 17:10:15 -08:00
misc misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
src cmd/compile: simplify bounded shift on loong64 2025-03-12 18:18:03 -07:00
test cmd/compile: simplify bounded shift on loong64 2025-03-12 18:18:03 -07:00
.gitattributes
…
.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
CONTRIBUTING.md
…
LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
PATENTS
…
README.md README: fix CC BY license name 2024-07-22 17:45:27 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00
codereview.cfg
…
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00

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 4.0 Attribution 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.

Download and Install

Binary Distributions

Official binary distributions are available at https://go.dev/dl/.

After downloading a binary release, visit https://go.dev/doc/install for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://go.dev/doc/install/source for source installation instructions.

Contributing

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

To contribute, please read the contribution guidelines at https://go.dev/doc/contribute.

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://go.dev/wiki/Questions for a list of places to ask questions about the Go language.