Joel Sing 3d627bb497 cpu: implement CPU feature detection for openbsd/arm64
OpenBSD 7.1 onwards expose the aarch64 ISAR0 and ISAR1 registers via sysctl:

  $ sysctl machdep
  machdep.compatible=apple,j274
  machdep.id_aa64isar0=153421459058925856
  machdep.id_aa64isar1=1172796674562

Implement CPU feature detection for openbsd/arm64 based on this information.

Updates golang/go#31746

Change-Id: I6dc473d93ccff720582c05b75456de51269bc3e5
Reviewed-on: https://go-review.googlesource.com/c/sys/+/421799
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
2022-08-08 15:39:00 +00:00
2022-04-29 23:34:32 +00:00
2015-03-18 17:04:21 +00:00
2021-05-03 17:37:54 +00:00
2012-03-17 15:20:58 +11:00
2020-12-07 22:35:42 +00:00

sys

Go Reference

This repository holds supplemental Go packages for low-level interactions with the operating system.

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The easiest way to install is to run go get -u golang.org/x/sys. You can also manually git clone the repository to $GOPATH/src/golang.org/x/sys.

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