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56 Commits

Author SHA1 Message Date
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
Meng Zhuo
5a0f0661e0 cpu: support non-linux OS for riscv64 
Fixes golang/go#53698

Change-Id: Ia954aed4445a47fb8f8a2c0b9869aa8c50f2de15
Reviewed-on: https://go-review.googlesource.com/c/sys/+/416394
Auto-Submit: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Joel Sing <joel@sing.id.au>
 2022-07-08 08:52:39 +00:00
Ian Lance Taylor
9f5ed59c13 cpu: use xgetbv intrinsic 
Fixes golang/go#53302

Change-Id: I698ef44f90e2ec538ae4a057134c22c102a87ff8
Reviewed-on: https://go-review.googlesource.com/c/sys/+/411635
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Run-TryBot: Ian Lance Taylor <iant@google.com>
 2022-06-10 22:13:04 +00:00
Russ Cox
b5fbb4746d all: gofmt 
Gofmt to update doc comments to the new formatting.

For golang/go#51082.

Change-Id: I9a1c4b671c06820a1c383ee515f7884965fefa54
Reviewed-on: https://go-review.googlesource.com/c/sys/+/399602
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Russ Cox <rsc@golang.org>
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Run-TryBot: Russ Cox <rsc@golang.org>
 2022-04-29 23:34:32 +00:00
limeidan
0a89baf871 cpu: add basic support for GOARCH=loong64 
Updates golang/go#46229

Change-Id: Ibee284c742532dec798f4a5ecfe38b429825d7aa
Reviewed-on: https://go-review.googlesource.com/c/sys/+/399334
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Russ Cox <rsc@golang.org>
 2022-04-12 01:57:24 +00:00
Johan Van de Wauw
b874c991c1 cpu: fix typo in comments 
Change-Id: Icb2bacefd7d8656e0a5867cb90fe0ca06252ad0b
GitHub-Last-Rev: c6d3b42e1b
GitHub-Pull-Request: golang/sys#120
Reviewed-on: https://go-review.googlesource.com/c/sys/+/390934
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2022-03-10 02:08:20 +00:00
zhouguangyuan
97ca703d54 cpu: remove the declaration of function darwinSupportsAVX512 
The implement of darwinSupportsAVX512 has been removed in CL 361255.
But the command "go install -buildmode=shared std" failed because the
declaration of it is remained in cpu/cpu_gc_x86.go. It should be removed.

Update golang/go#49233
For golang/go#49942

Change-Id: I8fa7c61c20457e49414930029b9f026c335aa421
Reviewed-on: https://go-review.googlesource.com/c/sys/+/368994
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
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 2021-12-05 18:29:25 +00:00
Keith Randall
7861aae155 cpu: pretend AVX-512 is disabled on Darwin 
Darwin doesn't save/restore the AVX-512 mask registers when
processing a signal. Go generates lots of signals, which cause
the mask registers to randomly get clobbered. Better to pretend
that AVX-512 isn't supported.

Update golang/go#49233

Change-Id: I0dda77a6f205e10eefccd82e6f4f0f184dae42d9
Reviewed-on: https://go-review.googlesource.com/c/sys/+/361255
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Martin Möhrmann <martin@golang.org>
 2021-11-03 23:57:46 +00:00
Tobias Klauser
808efd93c3 cpu: enable TestARM64minimalFeatures on darwin/arm64 
Go 1.16 renamed the iOS port from darwin/arm64 to ios/arm64 and
darwin/arm64 was repurposed for the macOS ARM64 port (see
https://golang.org/doc/go1.16#darwin).

Now that Go 1.16 is the oldest supported release, the ios tag can be
used exclusively to detect iOS. Thus, TestARM64minimalFeatures which
ought to run on darwin/arm64 can now be enabled on that platform.

For golang/go#45696

Change-Id: Ic510fbf27dc813832507446201501df58c9f6f31
Reviewed-on: https://go-review.googlesource.com/c/sys/+/353530
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2021-10-02 10:42:44 +00:00
zhangyunhao
63515b42dc cpu: add support for detecting cmpxchg16b 
Change-Id: I892de938e85205c0506aa82e31297b7a99e48e44
Reviewed-on: https://go-review.googlesource.com/c/sys/+/329450
Trust: Martin Möhrmann <martin@golang.org>
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 2021-08-23 07:06:55 +00:00
Tobias Klauser
b0526f3d87 cpu: set PPC64.IsPOWER8 for Power9 on aix 
This is in line with the behavior on linux.

Fixes golang/go#46040

Change-Id: I01ba1896d879425d12096ae67250d7e60beb7a99
Reviewed-on: https://go-review.googlesource.com/c/sys/+/318549
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Trust: Bryan C. Mills <bcmills@google.com>
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 2021-05-11 11:38:59 +00:00
Vaughn Iverson
b677753862 cpu: fix AVX512 support detection on Darwin 
Summary: On darwin/amd64, it is not adequate to use OSXSAVE
bits to determine AVX512 availabilty. The reason is involved.
See github issue for details.

The fix consists of implementing Apple's recommended approach
using the process commpage cpu_capabilities bits to determine
availability of AVX512.

Fixes golang/go#43089

Change-Id: I1ba89965498863d268fbf2e427dbfd6429c7409f
Reviewed-on: https://go-review.googlesource.com/c/sys/+/285572
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 2021-05-03 07:37:44 +00:00
Tobias Klauser
8feff5de77 cpu: add //go:build lines to assembly files 
Change-Id: I44c0bab1cc8a3b7ce59a1c690cb22046bca32bac
Reviewed-on: https://go-review.googlesource.com/c/sys/+/313689
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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 2021-04-26 21:46:56 +00:00
Russ Cox
9a76102bfb all: go fmt ./... 
Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).

Not strictly necessary but will avoid spurious changes
as files are edited.

Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild

Change-Id: I01667f826428426a39c84717d02efa25fa44553c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/294490
TryBot-Result: Go Bot <gobot@golang.org>
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Reviewed-by: Matt Layher <mdlayher@gmail.com>
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 2021-02-20 05:07:31 +00:00
Tamir Duberstein
0a15ea8d9b *: use more precise build tags 
s/!gccgo/gc/ in files which use gc-syntax assembly.

Change-Id: Iafc006cd60ad0e429cff182a05c790d80c380802
Reviewed-on: https://go-review.googlesource.com/c/sys/+/269717
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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 2020-11-13 13:57:34 +00:00
Joel Sing
201ba4db24 cpu: make x/sys/cpu build on non-linux mips64x 
Update golang/go#40995

Change-Id: Icab9865e59350c11da32bf8af2d0830001e41323
Reviewed-on: https://go-review.googlesource.com/c/sys/+/265959
Trust: Joel Sing <joel@sing.id.au>
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 2020-10-29 08:09:32 +00:00
Bill O'Farrell
708e7fb298 cpu: add support for zos/s390x 
This adds feature detection that works on the s390x running zos.
There are some differences with Linux (no hwcap, facilities vector available in-memory).
These changes should not affect other platforms.

Fixes golang/go#41984.

Change-Id: Ieabbfafd07367a346a4d279dde0f00aa3fc4321b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/262477
Run-TryBot: Emmanuel Odeke <emmanuel@orijtech.com>
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Trust: Emmanuel Odeke <emmanuel@orijtech.com>
 2020-10-28 09:49:53 +00:00
Tobias Klauser
ef9fd89ba2 cpu: read ARM64 registers using sysctl(3) on netbsd/arm64 
Use sysctl("machdep.cpu0.cpu_id") to retrieve the ARM64 cpu_id
information on netbsd/arm64. This includes the ISAR0, ISAR1 and PFR0
registers which can be parsed using existing functionality.

In order to use sysctl(3) without depending on x/sys/unix, some
functionality needed to be copied and slightly adjusted.

Change-Id: Ic9a133917ae5da516e6794f375bd7602d9bd3aa6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/264378
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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 2020-10-24 13:24:49 +00:00
Tobias Klauser
fb209a7c41 cpu: refactor parsing of ARM64 registers into separate function 
This will allow to re-use the implementation when adding support for
netbsd/arm64 which will retreive these register values using sysctl(3).

Change-Id: I2414cc4c6d1a91fff946466e4bf6d95d07f30137
Reviewed-on: https://go-review.googlesource.com/c/sys/+/264377
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 2020-10-22 20:17:47 +00:00
Tobias Klauser
98379d014c cpu: avoid illegal instruction on openbsd/arm64 
On OpenBSD, this package tries to read a privileged register, which
results in a SIGILL. Use the same workaround as Android, iOS and NetBSD.

Update golang/go#31746

Change-Id: I981249310169bc30b018c1a157529a4e46597d81
Reviewed-on: https://go-review.googlesource.com/c/sys/+/263337
Trust: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Joel Sing <joel@sing.id.au>
 2020-10-18 12:10:11 +00:00
Anton Kuklin
006507a758 cpu: add support for detecting AVX-512 
The existing implementation hasn't AVX-512 detection support.
This patch extends cpu package with such a functionality.

Fixes golang/go#41288

Change-Id: Iaddd57c5ff6d73360b77886458b9210b6c446859
Reviewed-on: https://go-review.googlesource.com/c/sys/+/257937
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
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 2020-09-28 20:51:50 +00:00
Cherry Zhang
d9f96fdee2 all: add GOOS=ios 
Following CL 254740, this CL does it on x/sys.

Updates golang/go#38485.

Change-Id: I5eab09a9a87c87fc883b5701434415648fb28eb0
Reviewed-on: https://go-review.googlesource.com/c/sys/+/255557
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 2020-09-23 18:26:05 +00:00
Joel Sing
d785dc2583 cpu: add missing build tag for linux 
The code in this file is specific to linux and does not build on other
mips64x platforms.

Change-Id: Ic27eedf06f39a7d2c51f5b261d957eed04e5df0b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/249318
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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 2020-08-19 17:11:15 +00:00
Polina Osadcha
0cf7623e9d cpu: add GODEBUG options to disable use of instruction set extensions 
The GODEBUG environment variable can be used to disable usage of
specific processor features of Go programs that use the sys/cpu package.
This is useful for testing and benchmarking different code paths that
are guarded by sys/cpu variable checks.

Use of processor features can not be enabled through GODEBUG.

To disable usage of AVX and SSE41 cpu features on GOARCH amd64 use:
GODEBUG=cpu.avx=off,cpu.sse41=off

The special "all" option can be used to disable all options:
GODEBUG=all=off

This aligns the support of GODEBUG for sys/cpu with existing support
for GODEBUG in the Go standard library package internal/cpu.

Fixes golang/go#33963

Change-Id: I618b71af397bf06c57a49b2a300d032a16d05664
Reviewed-on: https://go-review.googlesource.com/c/sys/+/245237
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
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 2020-08-05 06:55:43 +00:00
Tobias Klauser
f1bc736245 cpu: adjust godoc comment for hostByteOrder 
This was changed in CL 194646 to no longer depend on the encoding/binary
package. Adjust the godoc comment as well.

Change-Id: I1f23dc83a4c1256ebce8a283623f79e1bd00da51
Reviewed-on: https://go-review.googlesource.com/c/sys/+/238037
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 2020-06-15 20:00:32 +00:00
Tobias Klauser
2780627062 cpu: add all GOARCHes supported by gccgo 
Extend hostByteOrder to return the correct byte order for all GOARCHes
currently supported by gccgo.

Change-Id: I019de33aa598c58fe75cd7ad55479e6fce82dd8e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/237897
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 2020-06-15 19:00:26 +00:00
Benny Siegert
0598657881 cpu: avoid illegal instruction on netbsd/arm64 
On NetBSD, this package tries to read a privileged register,
which results in a SIGILL. Use the same workaround as Android and
iOS. In the future, we could use sysctl(3) instead.

Update golang/go#30824

Change-Id: Ifd9aa2a2cf4dac43341d013602d1ccb4b8d6eb6d
Reviewed-on: https://go-review.googlesource.com/c/sys/+/235097
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 2020-05-23 22:24:54 +00:00
Clément Chigot
1151b9dac4 cpu: add support for gccgo on aix 
Change-Id: Icb963d94baf7a1876ce89d0c5fe8cee04bb50629
Reviewed-on: https://go-review.googlesource.com/c/sys/+/233717
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 2020-05-15 09:58:57 +00:00
Tobias Klauser
062a44052d cpu: add mips64x feature detection 
Follow CL 200579

Change-Id: Ibedd6569bda3d7836ccb77a7746ed0e5df13c633
Reviewed-on: https://go-review.googlesource.com/c/sys/+/221698
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 2020-03-02 08:32:56 +00:00
Tobias Klauser
59e60aa80a cpu: don't read ARM64 registers on Android 
It seems like on Android we're not allowed in all cases to read the
registers ISAR0, ISAR1 and PFR0 to detect CPU features.

Fixes golang/go#36622

Change-Id: I577bd928a5a4dcd6e908cf059faa15fc0c80e3e5
Reviewed-on: https://go-review.googlesource.com/c/sys/+/215237
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 2020-01-17 14:54:32 +00:00
Tobias Klauser
85b82a3add cpu: support reading arm64 CPU feature registers 
This allows to detect ARM64 CPU features on non-Linux systems. On Linux,
this is used in case /proc/self/auxv cannot be read.

Change-Id: I67d55e989f2beda0c05a97ca5e55781840a8e01c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/209478
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 2019-12-04 07:21:56 +00:00
Tobias Klauser
344fec8e55 cpu: don't redeclare doinit on ppc64le 
Follow-up fix for CL 206859. Also order the +build line alphabetically.

Change-Id: I568c8b3ee03161d4341c151e4ec7150cade51077
Reviewed-on: https://go-review.googlesource.com/c/sys/+/206864
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 2019-11-13 16:50:28 +00:00
Tobias Klauser
2f3576d2c5 cpu: add basic support for GOARCH=riscv64 
Updates golang/go#27532

Change-Id: I7250f272ff46f2765d498a97644fb570ae745a6c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/206860
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 2019-11-13 15:47:02 +00:00
Tobias Klauser
e43da5d1f2 cpu: move empty doinit to own file 
Avoids each GOARCH having to define an empty doinit for GOOS=linux

Change-Id: Ic7cea1be4a35c31593c4f867478194b82dd53613
Reviewed-on: https://go-review.googlesource.com/c/sys/+/206859
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2019-11-13 15:46:56 +00:00
John Papandriopoulos
c990c680b6 cpu: support ARM feature detection on Linux 
Updates golang/go#33508

Change-Id: I9ea01090f5b4ac95c1a14881c305461bd4a7b5dd
Reviewed-on: https://go-review.googlesource.com/c/sys/+/190525
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 2019-09-27 07:32:44 +00:00
Brad Fitzpatrick
7ad0cfa0b7 cpu: remove encoding/binary dependency 
It's unnecessarily heavy, bringing in reflect, etc.

I'd like for this package to become a leaf package with no
dependencies so we can use it from the Go runtime directly and remove
internal/cpu.

Change-Id: I1794854add9ad87cc13b685bae4a039e1449c22d
Reviewed-on: https://go-review.googlesource.com/c/sys/+/194646
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Martin Möhrmann <moehrmann@google.com>
 2019-09-11 20:15:28 +00:00
Tobias Klauser
749cb33bea cpu: add a space before build tag comment 
Add a space before build tag comments so it corresponds to the format
documented at https://golang.org/pkg/go/build/.

Change-Id: Ia7c724daf70d419dec52a652188799441053a867
Reviewed-on: https://go-review.googlesource.com/c/sys/+/193198
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2019-09-04 15:47:56 +00:00
Tobias Klauser
5219a1e1c5 cpu: add missing linkname for libc_getsystemcfg on aix/ppc64 
This fixes the aix/ppc64 build after CL 179178

Change-Id: Ie8d762b533c05d6ca262030b34ae137140896d44
Reviewed-on: https://go-review.googlesource.com/c/sys/+/179317
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
 2019-05-29 13:00:38 +00:00
Brad Fitzpatrick
3626398d77 cpu: don't depend on the golang.org/x/sys/unix package for AIX 
gccgo support can happen in a future CL.

Updates golang/go#32102

Change-Id: Ic9e8d7b3e413079d277bdba565551845a2b78121
Reviewed-on: https://go-review.googlesource.com/c/sys/+/179178
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
 2019-05-28 18:36:47 +00:00
Tobias Klauser
fead790013 cpu: use unix.Getsystemcfg to detect POWER8/POWER9 on aix/ppc64 
Tested on an aix-ppc64 gomote builder.

Fixes golang/go#30732

Change-Id: I8e74dcde8bd4ded0f425c90eefe799970ebd325c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/166466
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2019-03-12 06:12:37 +00:00
Ian Lance Taylor
584f3b12f4 cpu: add build tag to cpu_wasm.go 
Fixes the build for Go versions before 1.11.

Fixes golang/go#30668

Change-Id: I0dfb2eafcbcbe7e466a3b0b5d20656be3e6f4982
Reviewed-on: https://go-review.googlesource.com/c/sys/+/166137
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2019-03-08 02:30:53 +00:00
Bryan C. Mills
b354f8bf4d cpu: define cacheLineSize and doinit for WASM 
This fixes a build break when compiling this package with
GOOS=js / GOARCH=wasm.

Updates golang/go#30241

Change-Id: I0b35aa50a69370ed0d83c522e12ce7613c4c3ec4
Reviewed-on: https://go-review.googlesource.com/c/sys/+/165749
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2019-03-06 22:02:34 +00:00
Michael Munday
6c9a33b5f7 cpu: add CPU features for s390x 
Add basic support for IBM Z (s390x) CPU feature (known as
'facilities') detection.

Note that some of these features are mandatory when using the Go
compiler (for example, ldisp and eimm) but aren't mandatory when
using gccgo.

Cryptographic function detection is not yet implemented for
gccgo.

Change-Id: Ic6494d0df0bc1c1ad1713c9ff11ae23fba03d215
Reviewed-on: https://go-review.googlesource.com/c/163003
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2019-02-28 11:51:10 +00:00
Tobias Klauser
92a0ff1e1e cpu: don't panic on error reading /proc/self/auxv 
On Android /proc/self/auxv is not readable, leading to a panic in init.
Instead of panic'ing in this case, introduce the Initialized global bool
to report whether the CPU features were initialized i.e. /proc/self/auxv
was successfullly read.

Fixes golang/go#30413

Change-Id: Ib520f202990614a76bceb0bf9d19a88eadd13e10
Reviewed-on: https://go-review.googlesource.com/c/164057
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2019-02-28 07:16:10 +00:00
Tobias Klauser
b4e8571b14 cpu: fix build for GOARCH=ppc64{,le} on GOOS!=linux 
The current implementation for ppc64{,le} only supports linux (through
HWCaps read from /proc/self/auxv) and fails to build e.g. on
aix/ppc64.

Change-Id: I5e1efe75c781fd08bc7bbe797df88295726ba62b
Reviewed-on: https://go-review.googlesource.com/c/162798
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2019-02-21 07:52:27 +00:00
Michael Munday
153ac47618 cpu: unexport HWCap and HWCap2 
These are an implementation detail and should not have been
exported. This only affects Linux on platforms other than 386 and
amd64.

Fixes golang/go#30255.

Change-Id: Ib23b42a7309fd6093b6b9d8b6628de222a3928be
Reviewed-on: https://go-review.googlesource.com/c/163004
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
 2019-02-19 09:28:55 +00:00
Michael Munday
d0b11bdaac cpu: fix auxval parsing on big-endian systems 
The words in auxval are encoded in native byte order.

I haven't added a test. This fix will be tested when s390x support
is added to the package.

Change-Id: I276f833660e6906c319995798faf9054ffc69461
Reviewed-on: https://go-review.googlesource.com/c/162902
Run-TryBot: Michael Munday <mike.munday@ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
 2019-02-15 14:29:49 +00:00
Tobias Klauser
e77772198c cpu: fix build for GOARCH=arm64 on GOOS!=linux 
The current implementation for arm64 only supports linux (through HWCaps
read from /proc/self/auxv) and fails to build e.g. on darwin/arm64.

Fixes golang/go#30237

Change-Id: I9f32a285760795441a829b0a81b2d5aff04e2dc4
Reviewed-on: https://go-review.googlesource.com/c/162797
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
 2019-02-14 21:44:11 +00:00
Tobias Klauser
2970a3744d cpu: detect RDRAND and RDSEED instructions on x86 
Change-Id: I2d0094d64ba12f888758aeebdb43aed353ddeeb9
Reviewed-on: https://go-review.googlesource.com/c/160577
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
 2019-02-01 07:34:06 +00:00
Carlos Eduardo Seo
20be8e55dc cpu: add linux/ppc64x 
Port from Go internal/cpu.

Fixes golang/go#25185

Change-Id: Id3cac18da6ffec9d10df755c4032ce3068ab634d
Reviewed-on: https://go-review.googlesource.com/c/152938
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
 2019-01-07 17:34:14 +00:00