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5 Commits

Author SHA1 Message Date
Ian Lance Taylor
9527bec266 cpu: fix gccgo build 
Current versions of gccgo report a redefinition error for both a
declaration and definition, as of https://golang.org/cl/93083.
Fix the last change to work with this.

Change-Id: Iae6a664fcc9fe97d4e3b7845a05dab3a8ad56830
Reviewed-on: https://go-review.googlesource.com/116776
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2018-06-06 20:27:47 +00:00
Alex Vaghin
bc2ef10f1b cpu: add gccgo implementation 
It uses __get_cpuid_count, provided by cpuid.h.
The xgetbv is implemented after its counterpart in cpu_x86.s.

Change-Id: I97624d7da67ab4ec3c9a53b0bfc4dfcdf7d12c87
Reviewed-on: https://go-review.googlesource.com/116155
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2018-06-06 16:53:29 +00:00
Tobias Klauser
538ab54ba9 cpu: introduce and export type CacheLinePad 
Add a CacheLinePad struct type that has a size of cacheLineSize.
This can be used for padding structs in order to avoid false sharing.

Fixes golang/go#25203

Change-Id: I6b6daf91ea0e9c50428ffa053035429c3921b461
Reviewed-on: https://go-review.googlesource.com/111775
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-06-06 11:15:58 +00:00
Tobias Klauser
7db1c3b1a9 cpu: use t.Fatal instead of t.Fatalf 
The messages contain no format string, so there is no need to use
t.Fatalf.

Change-Id: I29098c04797f919784b732af84a63fbaed671558
Reviewed-on: https://go-review.googlesource.com/111776
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-05-07 13:57:25 +00:00
Andreas Auernhammer
4adea008a5 cpu: new package 
This CL introduces a new cpu package for CPU/platform feature detection.
The cpu package is basically a copy of `internal/cpu` of the standard library.
Revision: bf86aec25972f3a100c3aa58a6abcbcc35bdea49

This CL does not export ARM64 and PPC64 feature detection since at the moment
ARM64/PPC64 requires standard library support.

Updates golang/go#24843

Change-Id: I11bc1ca60b116e902c941b5887c00870dbb1f899
Reviewed-on: https://go-review.googlesource.com/107015
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2018-04-30 17:35:09 +00:00