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// asmcheck
// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// These tests check that atomic instructions without dynamic checks are
// generated for architectures that support them
package codegen
import "sync/atomic"
type Counter struct {
count int32
}
func (c *Counter) Increment() {
// Check that ARm64 v8.0 has both atomic instruction (LDADDALW) and a dynamic check
// (for arm64HasATOMICS), while ARM64 v8.1 has only atomic and no dynamic check.
// arm64/v8.0:"LDADDALW"
// arm64/v8.1:"LDADDALW"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// amd64:"LOCK",-"CMPXCHG"
atomic.AddInt32(&c.count, 1)
}
func atomicLogical64(x *atomic.Uint64) uint64 {
var r uint64
// arm64/v8.0:"LDCLRALD"
// arm64/v8.1:"LDCLRALD"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// On amd64, make sure we use LOCK+AND instead of CMPXCHG when we don't use the result.
// amd64:"LOCK",-"CMPXCHGQ"
x.And(11)
// arm64/v8.0:"LDCLRALD"
// arm64/v8.1:"LDCLRALD"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// amd64:"LOCK","CMPXCHGQ"
r += x.And(22)
// arm64/v8.0:"LDORALD"
// arm64/v8.1:"LDORALD"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// On amd64, make sure we use LOCK+OR instead of CMPXCHG when we don't use the result.
// amd64:"LOCK",-"CMPXCHGQ"
x.Or(33)
// arm64/v8.0:"LDORALD"
// arm64/v8.1:"LDORALD"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// amd64:"LOCK","CMPXCHGQ"
r += x.Or(44)
return r
}
func atomicLogical32(x *atomic.Uint32) uint32 {
var r uint32
// arm64/v8.0:"LDCLRALW"
// arm64/v8.1:"LDCLRALW"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// On amd64, make sure we use LOCK+AND instead of CMPXCHG when we don't use the result.
// amd64:"LOCK",-"CMPXCHGL"
x.And(11)
// arm64/v8.0:"LDCLRALW"
// arm64/v8.1:"LDCLRALW"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// amd64:"LOCK","CMPXCHGL"
r += x.And(22)
// arm64/v8.0:"LDORALW"
// arm64/v8.1:"LDORALW"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// On amd64, make sure we use LOCK+OR instead of CMPXCHG when we don't use the result.
// amd64:"LOCK",-"CMPXCHGL"
x.Or(33)
// arm64/v8.0:"LDORALW"
// arm64/v8.1:"LDORALW"
// arm64/v8.0:".*arm64HasATOMICS"
// arm64/v8.1:-".*arm64HasATOMICS"
// amd64:"LOCK","CMPXCHGL"
r += x.Or(44)
return r
}
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