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sync/atomic: add support for openbsd/arm
Change-Id: I45383de6d627be35f40e07a9008b6773f5c2b0d0 Reviewed-on: https://go-review.googlesource.com/7613 Reviewed-by: Minux Ma <minux@golang.org>
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src/sync/atomic/asm_openbsd_arm.s
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src/sync/atomic/asm_openbsd_arm.s
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// Copyright 2013 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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#include "textflag.h"
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// OpenBSD/ARM atomic operations.
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// TODO(minux): this only supports ARMv6K or higher.
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TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
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B ·CompareAndSwapUint32(SB)
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TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
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B ·armCompareAndSwapUint32(SB)
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TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
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B ·CompareAndSwapUint32(SB)
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TEXT ·AddInt32(SB),NOSPLIT,$0
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B ·AddUint32(SB)
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TEXT ·AddUint32(SB),NOSPLIT,$0
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B ·armAddUint32(SB)
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TEXT ·AddUintptr(SB),NOSPLIT,$0
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B ·AddUint32(SB)
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TEXT ·SwapInt32(SB),NOSPLIT,$0
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B ·SwapUint32(SB)
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TEXT ·SwapUint32(SB),NOSPLIT,$0
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B ·armSwapUint32(SB)
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TEXT ·SwapUintptr(SB),NOSPLIT,$0
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B ·SwapUint32(SB)
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TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
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B ·CompareAndSwapUint64(SB)
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TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-4
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B ·armCompareAndSwapUint64(SB)
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TEXT ·AddInt64(SB),NOSPLIT,$0
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B ·addUint64(SB)
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TEXT ·AddUint64(SB),NOSPLIT,$0
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B ·addUint64(SB)
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TEXT ·SwapInt64(SB),NOSPLIT,$0
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B ·swapUint64(SB)
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TEXT ·SwapUint64(SB),NOSPLIT,$0
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B ·swapUint64(SB)
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TEXT ·LoadInt32(SB),NOSPLIT,$0
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B ·LoadUint32(SB)
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TEXT ·LoadUint32(SB),NOSPLIT,$0-8
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MOVW addr+0(FP), R1
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load32loop:
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LDREX (R1), R2 // loads R2
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STREX R2, (R1), R0 // stores R2
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CMP $0, R0
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BNE load32loop
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MOVW R2, val+4(FP)
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RET
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TEXT ·LoadInt64(SB),NOSPLIT,$0
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B ·loadUint64(SB)
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TEXT ·LoadUint64(SB),NOSPLIT,$0
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B ·loadUint64(SB)
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TEXT ·LoadUintptr(SB),NOSPLIT,$0
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B ·LoadUint32(SB)
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TEXT ·LoadPointer(SB),NOSPLIT,$0
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B ·LoadUint32(SB)
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TEXT ·StoreInt32(SB),NOSPLIT,$0
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B ·StoreUint32(SB)
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TEXT ·StoreUint32(SB),NOSPLIT,$0-8
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MOVW addr+0(FP), R1
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MOVW val+4(FP), R2
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storeloop:
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LDREX (R1), R4 // loads R4
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STREX R2, (R1), R0 // stores R2
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CMP $0, R0
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BNE storeloop
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RET
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TEXT ·StoreInt64(SB),NOSPLIT,$0
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B ·storeUint64(SB)
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TEXT ·StoreUint64(SB),NOSPLIT,$0
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B ·storeUint64(SB)
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TEXT ·StoreUintptr(SB),NOSPLIT,$0
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B ·StoreUint32(SB)
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