140 lines
2.5 KiB
ArmAsm
Executable File
140 lines
2.5 KiB
ArmAsm
Executable File
// Copyright 2019 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 arm64
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#include "textflag.h"
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TEXT ·AndUint32(SB),$0-12
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MOVD ptr+0(FP), R0
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MOVW val+8(FP), R1
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again:
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LDAXRW (R0), R2
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ANDW R1, R2
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STLXRW R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·OrUint32(SB),$0-12
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MOVD ptr+0(FP), R0
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MOVW val+8(FP), R1
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again:
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LDAXRW (R0), R2
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ORRW R1, R2
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STLXRW R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·XorUint32(SB),$0-12
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MOVD ptr+0(FP), R0
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MOVW val+8(FP), R1
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again:
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LDAXRW (R0), R2
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EORW R1, R2
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STLXRW R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·CompareAndSwapUint32(SB),$0-20
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MOVD addr+0(FP), R0
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MOVW old+8(FP), R1
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MOVW new+12(FP), R2
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again:
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LDAXRW (R0), R3
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CMPW R1, R3
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BNE done
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STLXRW R2, (R0), R4
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CBNZ R4, again
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done:
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MOVW R3, prev+16(FP)
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RET
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TEXT ·AndUint64(SB),$0-16
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MOVD ptr+0(FP), R0
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MOVD val+8(FP), R1
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again:
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LDAXR (R0), R2
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AND R1, R2
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STLXR R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·OrUint64(SB),$0-16
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MOVD ptr+0(FP), R0
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MOVD val+8(FP), R1
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again:
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LDAXR (R0), R2
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ORR R1, R2
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STLXR R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·XorUint64(SB),$0-16
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MOVD ptr+0(FP), R0
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MOVD val+8(FP), R1
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again:
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LDAXR (R0), R2
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EOR R1, R2
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STLXR R2, (R0), R3
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CBNZ R3, again
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RET
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TEXT ·CompareAndSwapUint64(SB),$0-32
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MOVD addr+0(FP), R0
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MOVD old+8(FP), R1
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MOVD new+16(FP), R2
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again:
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LDAXR (R0), R3
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CMP R1, R3
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BNE done
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STLXR R2, (R0), R4
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CBNZ R4, again
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done:
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MOVD R3, prev+24(FP)
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RET
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TEXT ·IncUnlessZeroInt32(SB),NOSPLIT,$0-9
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MOVD addr+0(FP), R0
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again:
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LDAXRW (R0), R1
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CBZ R1, fail
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ADDW $1, R1
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STLXRW R1, (R0), R2
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CBNZ R2, again
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MOVW $1, R2
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MOVB R2, ret+8(FP)
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RET
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fail:
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MOVB ZR, ret+8(FP)
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RET
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TEXT ·DecUnlessOneInt32(SB),NOSPLIT,$0-9
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MOVD addr+0(FP), R0
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again:
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LDAXRW (R0), R1
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SUBSW $1, R1, R1
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BEQ fail
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STLXRW R1, (R0), R2
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CBNZ R2, again
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MOVW $1, R2
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MOVB R2, ret+8(FP)
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RET
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fail:
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MOVB ZR, ret+8(FP)
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RET
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