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79 Commits

Author SHA1 Message Date
Guoqi Chen
7401cce313 cpu: replace specific instructions with WORD in the function get_cpucfg on loong64 
The CPUCFG instruction on loong64 was introduced in Go1.24, which caused
compilation errors when using this feature in Go1.23 and earlier versions.

Change-Id: I68891bbfc527194ecdafebac3398e700bfb53c2f
Reviewed-on: https://go-review.googlesource.com/c/sys/+/656915
Reviewed-by: Meidan Li <limeidan@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
 2025-03-12 17:52:00 -07:00
Guoqi Chen
b8f7da6c5a cpu: add support for detecting cpu features on loong64 
Except for lasx, all other features have been implemented
in the Go mainline.

Change-Id: I61a09396ed23d17991b641a1265e952585cb5636
Reviewed-on: https://go-review.googlesource.com/c/sys/+/655355
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
 2025-03-11 18:36:47 -07:00
Grigorii Khvatskii
c75621413d cpu: add support for AVX-VNNI and IFMA detection 
Added detection for x86 AVX-VNNI (VEX-coded Vector Neural Network
Instructions) and AVX-IFMA (VEX-coded Integer Fused Multiply Add),
including both the base VNNI set and the Int8 extention.

Fixes golang/go#71142

Change-Id: I9e8d18b2e8bf81d5d4313a4a47fdf731fb3d44dd
GitHub-Last-Rev: 32ea443fc2
GitHub-Pull-Request: golang/sys#242
Reviewed-on: https://go-review.googlesource.com/c/sys/+/641155
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
 2025-01-10 12:06:19 -08:00
Vaughn Iverson
8f2aa9fb48 cpu: conditionally re-enable AVX512 support on darwin/amd64 
Darwin opmask clobbering bug was fixed in kernel version 21.3.0
as released in MacOS 12.2.0. This commit resolves issue by
checking for Darwin AVX512 support via a sysctl call with the
addition of a kernel minimum version check.

The kernel version check is completed without adding new
dependencies to x/sys/cpu. A sysctl call is accomplished by
copying a minimal amount of code from x/sys/unix, to retrieve
only the needed KERN_OSRELEASE value. This code is structured
in the same manner as an existing analogous AIX/PPC64 syscall.

The resulting dotted version string value is then parsed for
numeric comparison with a dependency free function.

All code in this contribution is structured to ease removal of
the special darwin/amd64 codepaths when that OS/arch combination
is eventually no longer supported by golang.

Resolves issue: golang/go#49233, reinstates fix for issue: golang/go#43089

Change-Id: I4755fc8b3865eb6562b0959ecc910e2c46ac6cb4
Reviewed-on: https://go-review.googlesource.com/c/sys/+/620256
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: vsivsi@yahoo.com <vsivsi@yahoo.com>
 2024-11-04 23:17:32 +00:00
cuishuang
2dfefb6832 all: execute gofmt 
Change-Id: I55aef760145df773be30d567c9e989f46a3e79dc
Reviewed-on: https://go-review.googlesource.com/c/sys/+/618898
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
 2024-10-11 18:38:43 +00:00
Mark Ryan
3283fc3f61 cpu: add support for detecting RISC-V extensions 
Add a RISCV64 variable to cpu that indicates both the presence
of RISC-V extensions and performance information about the underlying
RISC-V cores.  The variable is only populated with non false values on
Linux.  The detection code first attempts to use the riscv_hwprobe
syscall introduced in Linux 6.4, falling back to HWCAP if riscv_hwprobe
is not supported.  The patch can detect the C, V, Zba, Zbb and Zbs
extensions.  V, Zba, Zbb and Zbs can only be detected on a 6.5 kernel
or later (without backports).

Updates golang/go#61416

Change-Id: I40f92724ee3d337c06bdc559ff0b18a8f6bfda9f
Reviewed-on: https://go-review.googlesource.com/c/sys/+/605815
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
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Reviewed-by: Joel Sing <joel@sing.id.au>
Reviewed-by: Meng Zhuo <mengzhuo1203@gmail.com>
 2024-08-23 10:43:34 +00:00
Hernan Martinez
7bb0bf703b cpu: add Int8 matrix multiplication instructions CPU feature flag for ARM64 
References:
5bbd9b2498/arch/arm64/include/uapi/asm/hwcap.h (L75C9-L75C31)

https://developer.arm.com/documentation/ddi0601/2024-03/AArch64-Registers/ID-AA64ISAR1-EL1--AArch64-Instruction-Set-Attribute-Register-1

Change-Id: Ic4e1cf2c23097c7e8695453b6d0b335756d474bc
Reviewed-on: https://go-review.googlesource.com/c/sys/+/595678
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
 2024-07-17 17:57:00 +00:00
Roland Shoemaker
0c18c88c71 cpu: add DIT option and hwcap DIT support 
Follow-up to https://go.dev/cl/597377, add a option for DIT so it can be
set via GODEBUG, and add hwcap support for Linux.

Change-Id: Ib094b520edea9c099d37f121b09d02b31644a433
Reviewed-on: https://go-review.googlesource.com/c/sys/+/598719
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Reviewed-by: Ian Lance Taylor <iant@google.com>
 2024-07-17 01:04:09 +00:00
Roland Shoemaker
47fe916942 cpu: add support for DIT detection 
Change-Id: I9f0991da9684ebd297e40a754e34130c418c34d0
Reviewed-on: https://go-review.googlesource.com/c/sys/+/597377
Reviewed-by: Ian Lance Taylor <iant@google.com>
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 2024-07-11 16:45:38 +00:00
Michal Hruby
7758090324 cpu: add support for sve2 detection 
Fixes golang/go#66952

Change-Id: Idaf2ce3b09baf33cf29079677a83a51ea9c4b255
GitHub-Last-Rev: eac00886d1
GitHub-Pull-Request: golang/sys#193
Reviewed-on: https://go-review.googlesource.com/c/sys/+/580655
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
 2024-05-03 16:45:19 +00:00
Dmitri Shuralyov
1bfbee0e20 all: update go directive to 1.18 
Done with:

go get go@1.18
go mod tidy
go fix ./...

Using go1.21.3.

Also update code generators to use only the new go:build lines,
not the old +build ones.

For golang/go#60268.

Change-Id: I6aabc42efb6ab3329981100e1db2263aac5e92a6
Reviewed-on: https://go-review.googlesource.com/c/sys/+/534222
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
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 2023-10-11 21:54:30 +00:00
Kir Kolyshkin
f3ef2d1cfa cpu: remove the use of ioutil 
A trivial change.

Change-Id: I8121c263d5b8e9d0634d4f38847aff3cb770ef96
Reviewed-on: https://go-review.googlesource.com/c/sys/+/526301
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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 2023-09-14 15:30:27 +00:00
Meng Zhuo
38ebf4150f cpu: fix wrong cache line size of riscv64 
This CL follows CL526659 as cache line should be 64 Bytes

Change-Id: Id3a49dbfbfad6aeb439eb5e585fd2d6228a3d3ed
Reviewed-on: https://go-review.googlesource.com/c/sys/+/526935
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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 2023-09-13 01:34:38 +00:00
cui fliter
70233675ae cpu: remove repetitive word 
Change-Id: I6dbed409b549ab2cfc862094f19373816b7c0859
Reviewed-on: https://go-review.googlesource.com/c/sys/+/519076
Reviewed-by: Ian Lance Taylor <iant@google.com>
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 2023-08-16 01:58:07 +00:00
Anton Kuklin
eabbd5c036 cpu: add support for amx detection 
Added detection for x86 AMX,
including AMX-Tile, AMX-INT8 and AMX-BF16
instruction sets.

Change-Id: Ib3d663430b64d46b46b22bdd05d40f1992e37ee0
GitHub-Last-Rev: 7986ed6d4f
GitHub-Pull-Request: golang/sys#170
Reviewed-on: https://go-review.googlesource.com/c/sys/+/516815
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
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 2023-08-14 16:42:18 +00:00
Tobias Klauser
352d8339e8 cpu: add test for IsBigEndian 
For golang/go#57237

Change-Id: I11d1c954f942ebd836c4deb9c710c40778dc5599
Reviewed-on: https://go-review.googlesource.com/c/sys/+/494858
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 2023-05-16 16:00:41 +00:00
Tobias Klauser
c43fe1e1f5 cpu: define IsBigEndian on wasm 
For golang/go#57237

Change-Id: Ia2aa943e93c8df51cd08003535fa026d2bb8003e
Reviewed-on: https://go-review.googlesource.com/c/sys/+/494856
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 2023-05-16 16:00:40 +00:00
Brad Fitzpatrick
2da1413846 cpu: get hwcap/auxv from the Go 1.21+ runtime 
Depends on https://go.dev/cl/458256

This change only does Linux for now.

Updates golang/go#57336

Change-Id: I0659697c1bdc6e2577c6251b964a0df32047ee12
Reviewed-on: https://go-review.googlesource.com/c/sys/+/465295
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 2023-02-17 19:36:37 +00:00
Tobias Klauser
13fe000ef0 cpu: add IsBigEndian 
Copy the definition of x/sys/unix.isBigEndian to x/sys/cpu.

Updates golang/go#57237

Change-Id: Iefbf4303720445611de93b0a3ea365f8208c033b
Reviewed-on: https://go-review.googlesource.com/c/sys/+/463335
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 2023-01-27 13:35:52 +00:00
Tobias Klauser
b8be2fde2a cpu: add //go:build line to cpu_gccgo_x86.c 
Change-Id: I597a83c767bf597f4d5c2ffdd7097f3cd6781f84
Reviewed-on: https://go-review.googlesource.com/c/sys/+/460158
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 2023-01-05 18:34:43 +00:00
Brad Fitzpatrick
2204b6615f cpu: parse /proc/cpuinfo on linux/arm64 on old kernels when needed 
Updates tailscale/tailscale#5793
Fixes golang/go#57336

Change-Id: I4f8128bebcc58f265d447ecaaad2473aafa9131c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/458315
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 2022-12-20 02:54:02 +00:00
Joel Sing
3938a4f48c cpu: add support for ppc64 on platforms other than aix and linux 
This allows the cpu package to function on openbsd/ppc64.

Updates golang/go#56001

Change-Id: Iff306b6091da8f7dc28dd1bd2c9ba668b5318a67
Reviewed-on: https://go-review.googlesource.com/c/sys/+/439977
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 2022-10-10 17:02:31 +00:00
Pure White
20c2bfdbfe cpu: fix cpu cacheLineSize for arm64 darwin(a.k.a. M1) 
The existing value for M1 is 64, which is the same as other arm64 cpus.
But the correct cacheLineSize for M1 should be 128, which can be
verified using the following command:

$ sysctl -a hw | grep cachelinesize
hw.cachelinesize: 128

Fixes golang/go#53075

Change-Id: I555716ed412cdc02941c8b1d9767952f7ad6678c
Reviewed-on: https://go-review.googlesource.com/c/sys/+/408614
Run-TryBot: Keith Randall <khr@golang.org>
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 2022-08-23 22:43:34 +00:00
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
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 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>
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 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
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 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
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 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
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 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
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 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
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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
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 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
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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
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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
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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
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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
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Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
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Run-TryBot: Russ Cox <rsc@golang.org>
 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
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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
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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
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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
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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
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
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
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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
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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
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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