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sync/atomic: darwin/arm support

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Change-Id: I213a8ab0b8c027a7b73567aeefdca73fd10eae28
Reviewed-on: https://go-review.googlesource.com/2122
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This commit is contained in:
Shenghou Ma 2014-12-26 01:08:23 -05:00 committed by Minux Ma
parent 56e8f8e822
commit a1457cac9c
1 changed files with 99 additions and 0 deletions
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99
src/sync/atomic/asm_darwin_arm.s Normal file
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// Copyright 2012 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"
// Darwin/ARM atomic operations.
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)