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Update #61395 Change-Id: I59a950f48efc587dfdffce00e2f4f3ab99d8df00 Reviewed-on: https://go-review.googlesource.com/c/go/+/594738 LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Nicolas Hillegeer <aktau@google.com>
96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
// asmcheck
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// Copyright 2024 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// These tests check that atomic instructions without dynamic checks are
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// generated for architectures that support them
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package codegen
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import "sync/atomic"
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type Counter struct {
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count int32
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}
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func (c *Counter) Increment() {
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// Check that ARm64 v8.0 has both atomic instruction (LDADDALW) and a dynamic check
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// (for arm64HasATOMICS), while ARM64 v8.1 has only atomic and no dynamic check.
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// arm64/v8.0:"LDADDALW"
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// arm64/v8.1:"LDADDALW"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// amd64:"LOCK",-"CMPXCHG"
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atomic.AddInt32(&c.count, 1)
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}
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func atomicLogical64(x *atomic.Uint64) uint64 {
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var r uint64
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// arm64/v8.0:"LDCLRALD"
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// arm64/v8.1:"LDCLRALD"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// On amd64, make sure we use LOCK+AND instead of CMPXCHG when we don't use the result.
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// amd64:"LOCK",-"CMPXCHGQ"
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x.And(11)
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// arm64/v8.0:"LDCLRALD"
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// arm64/v8.1:"LDCLRALD"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// amd64:"LOCK","CMPXCHGQ"
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r += x.And(22)
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// arm64/v8.0:"LDORALD"
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// arm64/v8.1:"LDORALD"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// On amd64, make sure we use LOCK+OR instead of CMPXCHG when we don't use the result.
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// amd64:"LOCK",-"CMPXCHGQ"
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x.Or(33)
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// arm64/v8.0:"LDORALD"
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// arm64/v8.1:"LDORALD"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// amd64:"LOCK","CMPXCHGQ"
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r += x.Or(44)
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return r
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}
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func atomicLogical32(x *atomic.Uint32) uint32 {
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var r uint32
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// arm64/v8.0:"LDCLRALW"
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// arm64/v8.1:"LDCLRALW"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// On amd64, make sure we use LOCK+AND instead of CMPXCHG when we don't use the result.
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// amd64:"LOCK",-"CMPXCHGL"
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x.And(11)
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// arm64/v8.0:"LDCLRALW"
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// arm64/v8.1:"LDCLRALW"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// amd64:"LOCK","CMPXCHGL"
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r += x.And(22)
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// arm64/v8.0:"LDORALW"
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// arm64/v8.1:"LDORALW"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// On amd64, make sure we use LOCK+OR instead of CMPXCHG when we don't use the result.
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// amd64:"LOCK",-"CMPXCHGL"
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x.Or(33)
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// arm64/v8.0:"LDORALW"
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// arm64/v8.1:"LDORALW"
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// arm64/v8.0:".*arm64HasATOMICS"
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// arm64/v8.1:-".*arm64HasATOMICS"
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// amd64:"LOCK","CMPXCHGL"
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r += x.Or(44)
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return r
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}
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