15817e409b
We save and restore the link register in non-leaf functions because it is clobbered by CALLs. It is therefore available for general purpose use. Only enabled on s390x currently. The RC4 benchmarks in particular benefit from the extra register: name old speed new speed delta RC4_128 243MB/s ± 2% 341MB/s ± 2% +40.46% (p=0.008 n=5+5) RC4_1K 267MB/s ± 0% 359MB/s ± 1% +34.32% (p=0.008 n=5+5) RC4_8K 271MB/s ± 0% 362MB/s ± 0% +33.61% (p=0.008 n=5+5) Change-Id: Id23bff95e771da9425353da2f32668b8e34ba09f Reviewed-on: https://go-review.googlesource.com/30597 Reviewed-by: Cherry Zhang <cherryyz@google.com> Run-TryBot: Michael Munday <munday@ca.ibm.com> TryBot-Result: Gobot Gobot <gobot@golang.org> |
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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.
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