116 lines
2.1 KiB
ArmAsm
116 lines
2.1 KiB
ArmAsm
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build amd64
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#include "textflag.h"
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TEXT ·AndUint32(SB),$0-12
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MOVQ addr+0(FP), BP
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MOVL val+8(FP), AX
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LOCK
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ANDL AX, 0(BP)
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RET
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TEXT ·OrUint32(SB),$0-12
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MOVQ addr+0(FP), BP
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MOVL val+8(FP), AX
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LOCK
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ORL AX, 0(BP)
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RET
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TEXT ·XorUint32(SB),$0-12
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MOVQ addr+0(FP), BP
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MOVL val+8(FP), AX
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LOCK
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XORL AX, 0(BP)
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RET
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TEXT ·CompareAndSwapUint32(SB),$0-20
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MOVQ addr+0(FP), DI
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MOVL old+8(FP), AX
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MOVL new+12(FP), DX
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LOCK
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CMPXCHGL DX, 0(DI)
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MOVL AX, ret+16(FP)
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RET
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TEXT ·AndUint64(SB),$0-16
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MOVQ addr+0(FP), BP
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MOVQ val+8(FP), AX
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LOCK
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ANDQ AX, 0(BP)
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RET
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TEXT ·OrUint64(SB),$0-16
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MOVQ addr+0(FP), BP
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MOVQ val+8(FP), AX
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LOCK
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ORQ AX, 0(BP)
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RET
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TEXT ·XorUint64(SB),$0-16
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MOVQ addr+0(FP), BP
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MOVQ val+8(FP), AX
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LOCK
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XORQ AX, 0(BP)
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RET
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TEXT ·CompareAndSwapUint64(SB),$0-32
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MOVQ addr+0(FP), DI
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MOVQ old+8(FP), AX
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MOVQ new+16(FP), DX
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LOCK
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CMPXCHGQ DX, 0(DI)
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MOVQ AX, ret+24(FP)
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RET
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TEXT ·IncUnlessZeroInt32(SB),NOSPLIT,$0-9
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MOVQ addr+0(FP), DI
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MOVL 0(DI), AX
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retry:
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TESTL AX, AX
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JZ fail
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LEAL 1(AX), DX
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LOCK
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CMPXCHGL DX, 0(DI)
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JNZ retry
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SETEQ ret+8(FP)
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RET
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fail:
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MOVB AX, ret+8(FP)
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RET
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TEXT ·DecUnlessOneInt32(SB),NOSPLIT,$0-9
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MOVQ addr+0(FP), DI
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MOVL 0(DI), AX
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retry:
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LEAL -1(AX), DX
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TESTL DX, DX
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JZ fail
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LOCK
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CMPXCHGL DX, 0(DI)
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JNZ retry
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SETEQ ret+8(FP)
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RET
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fail:
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MOVB DX, ret+8(FP)
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RET
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