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sync/atomic: add support for openbsd/arm

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Change-Id: I45383de6d627be35f40e07a9008b6773f5c2b0d0
Reviewed-on: https://go-review.googlesource.com/7613
Reviewed-by: Minux Ma <minux@golang.org>
This commit is contained in:
Joel Sing 2015-03-15 17:32:20 +11:00
parent 6ed6cb4550
commit 6900a421a4
1 changed files with 100 additions and 0 deletions
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100
src/sync/atomic/asm_openbsd_arm.s Normal file
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// Copyright 2013 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.
#include "textflag.h"
// OpenBSD/ARM atomic operations.
// TODO(minux): this only supports ARMv6K or higher.
TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
B ·CompareAndSwapUint32(SB)
TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
B ·armCompareAndSwapUint32(SB)
TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
B ·CompareAndSwapUint32(SB)
TEXT ·AddInt32(SB),NOSPLIT,$0
B ·AddUint32(SB)
TEXT ·AddUint32(SB),NOSPLIT,$0
B ·armAddUint32(SB)
TEXT ·AddUintptr(SB),NOSPLIT,$0
B ·AddUint32(SB)
TEXT ·SwapInt32(SB),NOSPLIT,$0
B ·SwapUint32(SB)
TEXT ·SwapUint32(SB),NOSPLIT,$0
B ·armSwapUint32(SB)
TEXT ·SwapUintptr(SB),NOSPLIT,$0
B ·SwapUint32(SB)
TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
B ·CompareAndSwapUint64(SB)
TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-4
B ·armCompareAndSwapUint64(SB)
TEXT ·AddInt64(SB),NOSPLIT,$0
B ·addUint64(SB)
TEXT ·AddUint64(SB),NOSPLIT,$0
B ·addUint64(SB)
TEXT ·SwapInt64(SB),NOSPLIT,$0
B ·swapUint64(SB)
TEXT ·SwapUint64(SB),NOSPLIT,$0
B ·swapUint64(SB)
TEXT ·LoadInt32(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·LoadUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
load32loop:
LDREX (R1), R2 // loads R2
STREX R2, (R1), R0 // stores R2
CMP $0, R0
BNE load32loop
MOVW R2, val+4(FP)
RET
TEXT ·LoadInt64(SB),NOSPLIT,$0
B ·loadUint64(SB)
TEXT ·LoadUint64(SB),NOSPLIT,$0
B ·loadUint64(SB)
TEXT ·LoadUintptr(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·LoadPointer(SB),NOSPLIT,$0
B ·LoadUint32(SB)
TEXT ·StoreInt32(SB),NOSPLIT,$0
B ·StoreUint32(SB)
TEXT ·StoreUint32(SB),NOSPLIT,$0-8
MOVW addr+0(FP), R1
MOVW val+4(FP), R2
storeloop:
LDREX (R1), R4 // loads R4
STREX R2, (R1), R0 // stores R2
CMP $0, R0
BNE storeloop
RET
TEXT ·StoreInt64(SB),NOSPLIT,$0
B ·storeUint64(SB)
TEXT ·StoreUint64(SB),NOSPLIT,$0
B ·storeUint64(SB)
TEXT ·StoreUintptr(SB),NOSPLIT,$0
B ·StoreUint32(SB)