| commit | 216714e44f703470f102cf248f7e9097160093d4 | [log] [tgz] |
|---|---|---|
| author | Lynn Boger <laboger@linux.vnet.ibm.com> | Mon Aug 17 10:57:54 2020 -0400 |
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | Tue Aug 18 20:25:26 2020 +0000 |
| tree | fcdf6fde7d4dccb64fd85a182946a68fef0ab162 | |
| parent | a40171857595db60e95a04b64aad8ba262cf64a7 [diff] |
math/big: improve performance of mulAddVWW on ppc64x This changes the assembly implementation on ppc64x to improve performance by reordering some instructions. It also eliminates an unnecessary move by changing an ADDZE to use the correct target register. Improvement on power9: MulAddVWW/1 6.89ns ± 0% 7.30ns ± 0% +5.95% (p=1.000 n=1+1) MulAddVWW/2 8.04ns ± 0% 8.06ns ± 0% +0.25% (p=1.000 n=1+1) MulAddVWW/3 9.39ns ± 0% 9.39ns ± 0% ~ (all equal) MulAddVWW/4 9.76ns ± 0% 9.48ns ± 0% -2.87% (p=1.000 n=1+1) MulAddVWW/5 10.5ns ± 0% 10.3ns ± 0% -1.90% (p=1.000 n=1+1) MulAddVWW/10 15.4ns ± 0% 14.9ns ± 0% -3.25% (p=1.000 n=1+1) MulAddVWW/100 149ns ± 0% 125ns ± 0% -16.11% (p=1.000 n=1+1) MulAddVWW/1000 1.42µs ± 0% 1.28µs ± 0% -9.74% (p=1.000 n=1+1) MulAddVWW/10000 14.2µs ± 0% 12.8µs ± 0% -9.73% (p=1.000 n=1+1) MulAddVWW/100000 144µs ± 0% 129µs ± 0% -10.10% (p=1.000 n=1+1) Change-Id: I0ae7002a69783ca19d7a4e3e42042ae75dc60069 Reviewed-on: https://go-review.googlesource.com/c/go/+/248721 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Carlos Eduardo Seo <cseo@linux.vnet.ibm.com> Reviewed-by: Paul Murphy <murp@ibm.com>
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
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.
Official binary distributions are available at https://golang.org/dl/.
After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.
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.
Go is the work of thousands of contributors. We appreciate your help!
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.