Fixes go lint warning.

Change-Id: I2d73208c6841f35d7a21a1fb4cfafbbd4250228f
Reviewed-on: https://go-review.googlesource.com/108659Reviewed-by: Iskander Sharipov <iskander.sharipov@intel.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: Ia2c87473d63175db6cb36a21be0769ae9fcb4f8b
Reviewed-on: https://go-review.googlesource.com/108695Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Change-Id: I954ca86c142e81c03ec867d10997617d1643b35d
GitHub-Last-Rev: 4ffcc780f16f20ad3a531638d4cef1c7d04da0bc
GitHub-Pull-Request: golang/go#24987
Reviewed-on: https://go-review.googlesource.com/108675Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates #24983 

Change-Id: I417453364346106d4ff4c99549175cef7df724e3
Reviewed-on: https://go-review.googlesource.com/108575
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>

We were using file descriptor 100, which requires the Linux kernel to
grow the fdtable size. That step may sometimes require a long time,
causing the test to fail. Switch to file descriptor 30, which should
not require growing the fdtable.

Fixes #23784

Change-Id: I3ac40d6f8569c70d34b470cfca34eff149bf8229
Reviewed-on: https://go-review.googlesource.com/108537
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>

Ignored reports whether sig is currently ignored.

This implementation only works applies on Unix systems for now.  However, at
the moment that is also the case for Ignore() and several other signal
interaction methods, so that seems fair.

Fixes #22497

Change-Id: I7c1b1a5e12373ca5da44709500ff5acedc6f1316
Reviewed-on: https://go-review.googlesource.com/108376
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Minor cleanup.

Change-Id: I4175de392969bb6408081a75cebdaeadcef1e68c
Reviewed-on: https://go-review.googlesource.com/108576
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This triggers three times while building std,
once in image/png and twice in go/internal/gccgoimporter.

There are no instances in std in which a more aggressive
optimization would have triggered.

This doesn't necessarily avoid an allocation,
because escape analysis is already able in many cases
to use a temporary backing for the string,
but it does at a minimum avoid the runtime call and copy.

Fixes #24937

Change-Id: I7019e85638ba8cd7e2f03890e672558b858579bc
Reviewed-on: https://go-review.googlesource.com/108035
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>

Change-Id: I6e1fa67dc9d4d151c90eb19a6f736e4daa7d4fb3
Reviewed-on: https://go-review.googlesource.com/107615
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Reject to compile I386/AMD64 asm code that contains
(Register)(PseudoReg*scale) forms of memory operands.
Example of such program: "CALL (AX)(PC*2)".
PseudoReg is one of the PC, FP, SB (but not SP).

When pseudo-register is used in register indirect as
scaled index base, x86 backend will panic because
its register file misses SB/FP/PC registers.

Fixes #12657.

Change-Id: I30fca797b537cbc86ab47583ae96c6a0c59acaa1
Reviewed-on: https://go-review.googlesource.com/107835
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This CL moves all of the logic for wiring up imported declarations
into export.go, so that it can be reused by the indexed importer
code. While here, increase symmetry across routines.

Passes toolstash-check.

Change-Id: I1ccec5c3999522b010e4d04ed56b632fd4d712d9
Reviewed-on: https://go-review.googlesource.com/107621
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

Part of the x86 asm backend cleanup. Passes toolstash-check.

Change-Id: Ib9766689fb7edb07f5553868cf89175501ea1e1b
Reviewed-on: https://go-review.googlesource.com/107055Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

Passes toolstash-check.

Change-Id: I7232ba43895a54b03cc328bb2e99c05c44eb6e8e
Reviewed-on: https://go-review.googlesource.com/107057Reviewed-by: Ilya Tocar <ilya.tocar@intel.com>
Run-TryBot: Iskander Sharipov <iskander.sharipov@intel.com>

Add a new DWARF attribute, DW_AT_go_runtime_type, that gives the offset
of the runtime type structure, if any, for a DWARF type. This should
allow debuggers to decode interface content without having to do awkward
name matching.

Fixes #24814

Change-Id: Ic7a66524d2be484154c584afa9697111618efea4
Reviewed-on: https://go-review.googlesource.com/106775Reviewed-by: Alessandro Arzilli <alessandro.arzilli@gmail.com>
Reviewed-by: David Chase <drchase@google.com>

These will appear when tracking live pointers in registers, so we need
to know whether they have pointers.

For #24543.

Change-Id: I2edccee39ca989473db4b3e7875ff166808ac141
Reviewed-on: https://go-review.googlesource.com/108497
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: David Chase <drchase@google.com>

Currently, each architecture lowers OpConvert to an arch-specific
OpXXXconvert. This is silly because OpConvert means the same thing on
all architectures and is logically a no-op that exists only to keep
track of conversions to and from unsafe.Pointer. Furthermore, lowering
it makes it harder to recognize in other analyses, particularly
liveness analysis.

This CL eliminates the lowering of OpConvert, leaving it as the
generic op until code generation time.

The main complexity here is that we still need to register-allocate
OpConvert operations. Currently, each arch's lowered OpConvert
specifies all GP registers in its register mask. Ideally, OpConvert
wouldn't affect value homing at all, and we could just copy the home
of OpConvert's source, but this can potentially home an OpConvert in a
LocalSlot, which neither regalloc nor stackalloc expect. Rather than
try to disentangle this assumption from regalloc and stackalloc, we
continue to register-allocate OpConvert, but teach regalloc that
OpConvert can be allocated to any allocatable GP register.

For #24543.

Change-Id: I795a6aee5fd94d4444a7bafac3838a400c9f7bb6
Reviewed-on: https://go-review.googlesource.com/108496
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

These refer to old function names.

Change-Id: Ic4507ff836b442e953a21c8a2d09def54e1e43a7
Reviewed-on: https://go-review.googlesource.com/108495
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

fix misspell on code comment.

Change-Id: I8280488f71f55616da5543eac0f58cc008354af9
GitHub-Last-Rev: ea144718ee5f6dccb3b694100e9edda923e576fc
GitHub-Pull-Request: golang/go#24975
Reviewed-on: https://go-review.googlesource.com/108458Reviewed-by: Alberto Donizetti <alb.donizetti@gmail.com>

All test cases are commented-out until real implementation is merged.

These files are required to make x86avxgen work: it expects that
for each new instruction it enables end2end test cases are available.

This test suite is automatically generated.
Additional AVX512 tests will be added later.

Change-Id: I5f5cb6b90540834585ee5ad4c00ebfbb6efa8094
Reviewed-on: https://go-review.googlesource.com/107217
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

No changes in the actual generated compiler code.

Change-Id: Ibae71b6de35722792cc94fea0cdfa5e53cf3c83e
Reviewed-on: https://go-review.googlesource.com/108476
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Due to some recent optimizations related to the compare
instruction, DS-form load instructions started to be used
to load 8-byte go.strings. This can cause link time errors
if the go.string is not aligned to 4 bytes.

For DS-form instructions, the value in the offset field must
be a multiple of 4. If the offset is known at the time the
rules are processed, a DS-form load will not be chosen. But for
go.strings, the offset is not known at that time, but a
relocation is generated indicating that the linker should fill
in the DS relocation. When the linker tries to fill in the
relocation, if the offset is not aligned properly, a link error
will occur.

To fix this, when loading a go.string using MOVDload, the full
address of the go.string is generated and loaded into the base
register. Then the go.string is loaded with a 0 offset field.

Added a testcase that reproduces this problem.

Fixes #24799

Change-Id: I6a154e8e1cba64eae290be0fbcb608b75884ecdd
Reviewed-on: https://go-review.googlesource.com/107855
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>

Current assembler encodes "ADD $0xaaaaaaaa, Rx" to "MOVD off(PC), Rtmp"
 + "ADD Rtmp, Rx", and a 64-bit item is stored in the constant pool.

This patch optimizes it to "MOVWU off(PC), Rtmp" + "ADD Rtmp, Rx",
and a 32-bit item is stored.

The total size of the executable binary go and the library files in
pkg/linux_arm64 decreased about 3KB by this patch.

Change-Id: Ieb1592f78ef9ed52f5d3ad232d6cdf87d0923de1
Reviewed-on: https://go-review.googlesource.com/107516Reviewed-by: Wei Xiao <Wei.Xiao@arm.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Update #18085
Fixes #24009

Change-Id: I655ad76284480002f8d49da269be92ded306128b
Reviewed-on: https://go-review.googlesource.com/107077Reviewed-by: Rob Pike <r@golang.org>

Vendor from golang.org/x/arch repo.  Pull in commits that update
arm64, arm, ppc64 and x86 directories (the latest commit 9111c30).

Change-Id: I2b4b3ea9662e69bcf0eeee9c6aba0118175524df
Reviewed-on: https://go-review.googlesource.com/107695
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Fixes gosimple warning "if err != nil { return err };
return nil' can be simplified to 'return err"

Change-Id: Ife7f78a3a76ab7802b5561d1afec536e103b504a
Reviewed-on: https://go-review.googlesource.com/108275Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The patch rewrites the content of doc.go file. The file describes some
general rules of the mapping between Go assembly syntax and GNU syntax.
And it gives some Go assembly examples and corresponding GNU assembly
examples.

The patch changes the doc.go to use standard doc comment format so that
the link https://golang.org/cmd/internal/obj/arm64/ can display it.

Assembly document framework is mainly contributed by Eric Fang <Eric.Fang@arm.com>
Documentation work is contributed by Eric Fang and Fannie Zhang <Fannie.Zhang@arm.com>

Change-Id: I8b3f6d6c6b91afdc2c44602e8f796beea905085e
Reviewed-on: https://go-review.googlesource.com/102055Reviewed-by: Rob Pike <r@golang.org>

There are a bunch of places where we generate functions: equality and
hash functions; method expression and promoted method wrappers; and
print/delete wrappers for defer/go statements.

This CL brings them in sync by:

1) Always using dclfunc and funcbody. Most were already using this,
but makepartialcall needed some changes.

2) Removing duplicate types.Markdcl/types.Popdcl calls. These are
already handled by dclfunc and funcbody.

3) Using structargs (already used by genwrapper) to construct new
param/result lists from existing types.

4) Always accessing the parameter ONAME nodes through Field.Nname
instead of poking into the ODCLFIELD. Also, since creating a slice of
the entire parameter list is common, extract this out into a
paramNnames helper function.

5) Add a Type.IsVariadic method to simplify identifying variadic
function types.

Passes toolstash-check -gcflags=-dwarf=false. DWARF output changes
because using structargs in makepartialcall changes the generated
parameter names.

Change-Id: I6661d3699afdbe7852ad60db5a4ec6eeb2b696e4
Reviewed-on: https://go-review.googlesource.com/108216
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

On Unix systems, the underlying socket is no longer forced into blocking
mode.

Fixes #24942

Change-Id: I3e0c503c72df0844e30a63af298691dedacd1f46
Reviewed-on: https://go-review.googlesource.com/108297
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

By simply rearranging the logic, we avoid the overhead of a superfluous
call to getsockopt. For, if p is already non empty, there's no point
in having to check if we need to attach dummy payload. This has
performance benefits when using send/recvmsg for high speed
communications.

Change-Id: Id85cff17328ecbf6d09dd52fbeeaa691dbe69b75
Reviewed-on: https://go-review.googlesource.com/108338Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This is to allow followup refactorings that will replace
Field.Nname.Pos with Field.Pos.

Passes toolstash-check.

Change-Id: I1060b6a37c60273892f7af5369809057cff61881
Reviewed-on: https://go-review.googlesource.com/108215
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>

Fixes golint warning about "if block ends with a return statement,
so drop this else and outdent its block".

Change-Id: Iac4fd324e04e3e3fe3e3933f5e59095041d292c5
Reviewed-on: https://go-review.googlesource.com/107115Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Fixes #23373

Fix interfacing with latest(1.4+) pkgconf versions, as they have change the
output format, by extending parsing function splitPkgConfigOutput to accommodate
more possible fragment escaping formats. Function is based on pkgconfigs own
implementation at
https://github.com/pkgconf/pkgconf/blob/master/libpkgconf/argvsplit.c. Along
with this change test case TestSplitPkgConfigOutput have been expanded. Thanks
to ignatenko for help on test cases and insights in to the pkgconfig.

Change-Id: I55301bb564b07128d5564ec1454dd247f84a95c3
Reviewed-on: https://go-review.googlesource.com/86541
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Change-Id: Ie4da1a515d5405140d742bdcd55f54a73a7f71fe
Reviewed-on: https://go-review.googlesource.com/108175Reviewed-by: Ian Lance Taylor <iant@golang.org>

ARM64 supports load/store instructions with a memory operand that
the address is calculated by base register + index register.

In this CL,
1. Some rules are added to the compile's ARM64 backend to emit
such efficient instructions.
2. A wrong rule of load combination is fixed.

The go1 benchmark does show improvement.

name                     old time/op    new time/op    delta
BinaryTree17-4              44.5s ± 2%     44.1s ± 1%   -0.81%  (p=0.000 n=28+29)
Fannkuch11-4                32.7s ± 3%     30.5s ± 0%   -6.79%  (p=0.000 n=30+26)
FmtFprintfEmpty-4           499ns ± 0%     506ns ± 5%   +1.39%  (p=0.003 n=25+30)
FmtFprintfString-4         1.07µs ± 0%    1.04µs ± 4%   -3.17%  (p=0.000 n=23+30)
FmtFprintfInt-4            1.15µs ± 4%    1.13µs ± 0%   -1.55%  (p=0.000 n=30+23)
FmtFprintfIntInt-4         1.77µs ± 4%    1.74µs ± 0%   -1.71%  (p=0.000 n=30+24)
FmtFprintfPrefixedInt-4    2.37µs ± 5%    2.12µs ± 0%  -10.56%  (p=0.000 n=30+23)
FmtFprintfFloat-4          3.03µs ± 1%    3.03µs ± 4%   -0.13%  (p=0.003 n=25+30)
FmtManyArgs-4              7.38µs ± 1%    7.43µs ± 4%   +0.59%  (p=0.003 n=25+30)
GobDecode-4                 101ms ± 6%      95ms ± 5%   -5.55%  (p=0.000 n=30+30)
GobEncode-4                78.0ms ± 4%    78.8ms ± 6%   +1.05%  (p=0.000 n=30+30)
Gzip-4                      4.25s ± 0%     4.27s ± 4%   +0.45%  (p=0.003 n=24+30)
Gunzip-4                    428ms ± 1%     420ms ± 0%   -1.88%  (p=0.000 n=23+23)
HTTPClientServer-4          549µs ± 1%     541µs ± 1%   -1.56%  (p=0.000 n=29+29)
JSONEncode-4                194ms ± 0%     188ms ± 4%     ~     (p=0.417 n=23+30)
JSONDecode-4                890ms ± 5%     831ms ± 0%   -6.55%  (p=0.000 n=30+23)
Mandelbrot200-4            47.3ms ± 2%    46.5ms ± 0%     ~     (p=0.980 n=30+26)
GoParse-4                  43.1ms ± 6%    43.8ms ± 6%   +1.65%  (p=0.000 n=30+30)
RegexpMatchEasy0_32-4      1.06µs ± 0%    1.07µs ± 3%     ~     (p=0.092 n=23+30)
RegexpMatchEasy0_1K-4      5.53µs ± 0%    5.51µs ± 0%   -0.24%  (p=0.000 n=25+25)
RegexpMatchEasy1_32-4      1.02µs ± 3%    1.01µs ± 0%   -1.27%  (p=0.000 n=30+24)
RegexpMatchEasy1_1K-4      7.26µs ± 0%    7.33µs ± 0%   +0.95%  (p=0.000 n=23+26)
RegexpMatchMedium_32-4     1.84µs ± 7%    1.79µs ± 1%     ~     (p=0.333 n=30+23)
RegexpMatchMedium_1K-4      553µs ± 0%     547µs ± 0%   -1.14%  (p=0.000 n=24+22)
RegexpMatchHard_32-4       30.8µs ± 1%    30.3µs ± 0%   -1.40%  (p=0.000 n=24+24)
RegexpMatchHard_1K-4        928µs ± 0%     929µs ± 5%   +0.12%  (p=0.013 n=23+30)
Revcomp-4                   8.13s ± 4%     6.32s ± 1%  -22.23%  (p=0.000 n=30+23)
Template-4                  899ms ± 6%     854ms ± 1%   -5.01%  (p=0.000 n=30+24)
TimeParse-4                4.66µs ± 4%    4.59µs ± 1%   -1.57%  (p=0.000 n=30+23)
TimeFormat-4               4.58µs ± 0%    4.61µs ± 0%   +0.57%  (p=0.000 n=26+24)
[Geo mean]                  717µs          698µs        -2.55%

name                     old speed      new speed      delta
GobDecode-4              7.63MB/s ± 6%  8.08MB/s ± 5%   +5.88%  (p=0.000 n=30+30)
GobEncode-4              9.85MB/s ± 4%  9.75MB/s ± 6%   -1.04%  (p=0.000 n=30+30)
Gzip-4                   4.56MB/s ± 0%  4.55MB/s ± 4%   -0.36%  (p=0.003 n=24+30)
Gunzip-4                 45.3MB/s ± 1%  46.2MB/s ± 0%   +1.92%  (p=0.000 n=23+23)
JSONEncode-4             10.0MB/s ± 0%  10.4MB/s ± 4%     ~     (p=0.403 n=23+30)
JSONDecode-4             2.18MB/s ± 5%  2.33MB/s ± 0%   +6.91%  (p=0.000 n=30+23)
GoParse-4                1.34MB/s ± 5%  1.32MB/s ± 5%   -1.66%  (p=0.000 n=30+30)
RegexpMatchEasy0_32-4    30.2MB/s ± 0%  29.8MB/s ± 3%     ~     (p=0.099 n=23+30)
RegexpMatchEasy0_1K-4     185MB/s ± 0%   186MB/s ± 0%   +0.24%  (p=0.000 n=25+25)
RegexpMatchEasy1_32-4    31.4MB/s ± 3%  31.8MB/s ± 0%   +1.24%  (p=0.000 n=30+24)
RegexpMatchEasy1_1K-4     141MB/s ± 0%   140MB/s ± 0%   -0.94%  (p=0.000 n=23+26)
RegexpMatchMedium_32-4    541kB/s ± 6%   560kB/s ± 0%   +3.45%  (p=0.000 n=30+23)
RegexpMatchMedium_1K-4   1.85MB/s ± 0%  1.87MB/s ± 0%   +1.08%  (p=0.000 n=24+23)
RegexpMatchHard_32-4     1.04MB/s ± 1%  1.06MB/s ± 1%   +1.48%  (p=0.000 n=24+24)
RegexpMatchHard_1K-4     1.10MB/s ± 0%  1.10MB/s ± 5%   +0.15%  (p=0.004 n=23+30)
Revcomp-4                31.3MB/s ± 4%  40.2MB/s ± 1%  +28.52%  (p=0.000 n=30+23)
Template-4               2.16MB/s ± 6%  2.27MB/s ± 1%   +5.18%  (p=0.000 n=30+24)
[Geo mean]               7.57MB/s       7.79MB/s        +2.98%

fixes #24907

Change-Id: I94afd0e3f53d62a1cf5e452f3dd6daf61be21785
Reviewed-on: https://go-review.googlesource.com/107376
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

CL 99337 introduced a file with CRLF line endings. Convert them to LF
line endings as in all other Go files.

Change-Id: I68b28fd443f05bebbbd9280d1821c4ccd33a4a8a
Reviewed-on: https://go-review.googlesource.com/108075
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Fixes #22874

Change-Id: Ia30fc8df39e88fbc2939a4490c34da8dd5815a94
GitHub-Last-Rev: 3ba7abcc96ee02837fbfd65c044326c2f1923020
GitHub-Pull-Request: golang/go#24307
Reviewed-on: https://go-review.googlesource.com/99337
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>

Make comment example consistent with its description.
Fixes #24767

Change-Id: Icff54b489040b1ce66c644a21343c6576304cf75
Reviewed-on: https://go-review.googlesource.com/107663Reviewed-by: Rob Pike <r@golang.org>

This change provides VREV64 instruction for AES-GCM implementation.

Change-Id: Icdf278862b03556388586f459964b025c47b8c19
Reviewed-on: https://go-review.googlesource.com/107696Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Previously these examples declared "var v Value" but any caller would
need to write "var v atomic.Value", so we should use the external
package declaration form to avoid confusion about where Value comes
from.

Change-Id: Ic0b1a05fb6b700da61cfc8efca594c49a9bedb69
Reviewed-on: https://go-review.googlesource.com/107975Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Use AT_TIMEKEEP ELF aux entry to access a kernel mapped ring of timehands structs.
The timehands are updated by the kernel periodically, but for accurate measure the
timecounter still needs to be queried.
Currently the fast path is used only when kern.timecounter.hardware==TSC-low
or kern.timecounter.hardware=='ARM MPCore Timecounter',
other timecounters revert back to regular system call.

TODO: add support for HPET timecounter on 386/amd64.

Change-Id: I321ca4e92be63ba21a2574b758ef5c1e729086ad
Reviewed-on: https://go-review.googlesource.com/93156
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>