ab4414773e
The compiler has caught up. In fact the compiler is ahead; it knows about a magic multiply-by-5 instruction: // compute '0' + byte(r - t*10) in AX MOVQ t, AX LEAQ (AX)(AX*4), AX SHLQ $1, AX MOVQ r, CX SUBQ AX, CX LEAL 48(CX), AX For comparison, the shifty version compiles to: // compute '0' + byte(r - t*10) in AX MOVQ t, AX MOVQ AX, CX SHLQ $3, AX MOVQ r, DX SUBQ AX, DX SUBQ CX, DX SUBQ CX, DX LEAL 48(DX), AX Fixes #2671. Change-Id: Ifbf23dbfeb19c0bb020fa44eb2f025943969fb6b Reviewed-on: https://go-review.googlesource.com/23372 Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Andrew Gerrand <adg@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
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.
Go is the work of hundreds of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
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 file). 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-source.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 https://golang.org/doc/install or doc/install.html for more details.