3e11e61f3c
Convert subtraction from const to a negated ADDI with negative const value, where possible. At worst this avoids a register load and uses the same number of instructions. At best, this allows for further optimisation to occur, particularly where equality is involved. For example, this sequence: li t0,-1 sub t1,t0,a0 snez t1,t1 Becomes: addi t0,a0,1 snez t0,t0 Removes more than 2000 instructions from the Go binary on linux/riscv64. Change-Id: I68f3be897bc645d4a8fa3ab3cef165a00a74df19 Reviewed-on: https://go-review.googlesource.com/c/go/+/426263 Reviewed-by: Meng Zhuo <mzh@golangcn.org> Reviewed-by: Heschi Kreinick <heschi@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Joel Sing <joel@sing.id.au> |
||
---|---|---|
.github | ||
api | ||
doc | ||
lib/time | ||
misc | ||
src | ||
test | ||
.gitattributes | ||
.gitignore | ||
codereview.cfg | ||
CONTRIBUTING.md | ||
LICENSE | ||
PATENTS | ||
README.md | ||
SECURITY.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 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.
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.