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| -rwxr-xr-x | pkg/atomicbitops/atomicbitops_arm64.s | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/pkg/atomicbitops/atomicbitops_arm64.s b/pkg/atomicbitops/atomicbitops_arm64.s new file mode 100755 index 000000000..5c780851b --- /dev/null +++ b/pkg/atomicbitops/atomicbitops_arm64.s @@ -0,0 +1,105 @@ +// Copyright 2019 The gVisor Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// +build arm64 + +#include "textflag.h" + +TEXT ·AndUint32(SB),$0-12 + MOVD ptr+0(FP), R0 + MOVW val+8(FP), R1 +again: + LDAXRW (R0), R2 + ANDW R1, R2 + STLXRW R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·OrUint32(SB),$0-12 + MOVD ptr+0(FP), R0 + MOVW val+8(FP), R1 +again: + LDAXRW (R0), R2 + ORRW R1, R2 + STLXRW R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·XorUint32(SB),$0-12 + MOVD ptr+0(FP), R0 + MOVW val+8(FP), R1 +again: + LDAXRW (R0), R2 + EORW R1, R2 + STLXRW R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·CompareAndSwapUint32(SB),$0-20 + MOVD addr+0(FP), R0 + MOVW old+8(FP), R1 + MOVW new+12(FP), R2 +again: + LDAXRW (R0), R3 + CMPW R1, R3 + BNE done + STLXRW R2, (R0), R4 + CBNZ R4, again +done: + MOVW R3, prev+16(FP) + RET + +TEXT ·AndUint64(SB),$0-16 + MOVD ptr+0(FP), R0 + MOVD val+8(FP), R1 +again: + LDAXR (R0), R2 + AND R1, R2 + STLXR R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·OrUint64(SB),$0-16 + MOVD ptr+0(FP), R0 + MOVD val+8(FP), R1 +again: + LDAXR (R0), R2 + ORR R1, R2 + STLXR R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·XorUint64(SB),$0-16 + MOVD ptr+0(FP), R0 + MOVD val+8(FP), R1 +again: + LDAXR (R0), R2 + EOR R1, R2 + STLXR R2, (R0), R3 + CBNZ R3, again + RET + +TEXT ·CompareAndSwapUint64(SB),$0-32 + MOVD addr+0(FP), R0 + MOVD old+8(FP), R1 + MOVD new+16(FP), R2 +again: + LDAXR (R0), R3 + CMP R1, R3 + BNE done + STLXR R2, (R0), R4 + CBNZ R4, again +done: + MOVD R3, prev+24(FP) + RET |