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The Go programming language
bb192d1399
For simplicity, only recognizes expressions of the exact form "(x << a) | (x >> b)" where x is a variable and a and b are integer constant expressions that add to x's bit width. Fixes #4629. $ cat rotate.c unsigned int rotate(unsigned int x) { x = (x << 3) | (x >> (sizeof(x) * 8 - 3)); return x; } ## BEFORE $ go tool 6c -S rotate.c (rotate.c:2) TEXT rotate+0(SB),$0-8 (rotate.c:2) MOVL x+0(FP),!!DX (rotate.c:4) MOVL DX,!!AX (rotate.c:4) SALL $3,!!AX (rotate.c:4) MOVL DX,!!CX (rotate.c:4) SHRL $29,!!CX (rotate.c:4) ORL CX,!!AX (rotate.c:5) RET ,!! (rotate.c:5) RET ,!! (rotate.c:5) END ,!! ## AFTER $ go tool 6c -S rotate.c (rotate.c:2) TEXT rotate+0(SB),$0-8 (rotate.c:4) MOVL x+0(FP),!!AX (rotate.c:4) ROLL $3,!!AX (rotate.c:5) RET ,!! (rotate.c:5) RET ,!! (rotate.c:5) END ,!! R=rsc, minux.ma CC=golang-dev https://golang.org/cl/7069056 |
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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.