github.com/d4l3k/go@v0.0.0-20151015000803-65fc379daeda/src/sync/atomic/asm_darwin_arm.s (about)

     1  // Copyright 2012 The Go Authors.  All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  #include "textflag.h"
     6  
     7  // Darwin/ARM atomic operations.
     8  
     9  TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
    10  	B ·CompareAndSwapUint32(SB)
    11  
    12  TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
    13  	B ·armCompareAndSwapUint32(SB)
    14  
    15  TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
    16  	B ·CompareAndSwapUint32(SB)
    17  
    18  TEXT ·AddInt32(SB),NOSPLIT,$0
    19  	B ·AddUint32(SB)
    20  
    21  TEXT ·AddUint32(SB),NOSPLIT,$0
    22  	B ·armAddUint32(SB)
    23  
    24  TEXT ·AddUintptr(SB),NOSPLIT,$0
    25  	B ·AddUint32(SB)
    26  
    27  TEXT ·SwapInt32(SB),NOSPLIT,$0
    28  	B ·SwapUint32(SB)
    29  
    30  TEXT ·SwapUint32(SB),NOSPLIT,$0
    31  	B ·armSwapUint32(SB)
    32  
    33  TEXT ·SwapUintptr(SB),NOSPLIT,$0
    34  	B ·SwapUint32(SB)
    35  
    36  TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
    37  	B ·CompareAndSwapUint64(SB)
    38  
    39  TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-4
    40  	B ·armCompareAndSwapUint64(SB)
    41  
    42  TEXT ·AddInt64(SB),NOSPLIT,$0
    43  	B ·addUint64(SB)
    44  
    45  TEXT ·AddUint64(SB),NOSPLIT,$0
    46  	B ·addUint64(SB)
    47  
    48  TEXT ·SwapInt64(SB),NOSPLIT,$0
    49  	B ·swapUint64(SB)
    50  
    51  TEXT ·SwapUint64(SB),NOSPLIT,$0
    52  	B ·swapUint64(SB)
    53  
    54  TEXT ·LoadInt32(SB),NOSPLIT,$0
    55  	B ·LoadUint32(SB)
    56  
    57  TEXT ·LoadUint32(SB),NOSPLIT,$0-8
    58  	MOVW addr+0(FP), R1
    59  load32loop:
    60  	LDREX (R1), R2		// loads R2
    61  	STREX R2, (R1), R0	// stores R2
    62  	CMP $0, R0
    63  	BNE load32loop
    64  	MOVW R2, val+4(FP)
    65  	RET
    66  
    67  TEXT ·LoadInt64(SB),NOSPLIT,$0
    68  	B ·loadUint64(SB)
    69  
    70  TEXT ·LoadUint64(SB),NOSPLIT,$0
    71  	B ·loadUint64(SB)
    72  
    73  TEXT ·LoadUintptr(SB),NOSPLIT,$0
    74  	B ·LoadUint32(SB)
    75  
    76  TEXT ·LoadPointer(SB),NOSPLIT,$0
    77  	B ·LoadUint32(SB)
    78  
    79  TEXT ·StoreInt32(SB),NOSPLIT,$0
    80  	B ·StoreUint32(SB)
    81  
    82  TEXT ·StoreUint32(SB),NOSPLIT,$0-8
    83  	MOVW addr+0(FP), R1
    84  	MOVW val+4(FP), R2
    85  storeloop:
    86  	LDREX (R1), R4		// loads R4
    87  	STREX R2, (R1), R0	// stores R2
    88  	CMP $0, R0
    89  	BNE storeloop
    90  	RET
    91  
    92  TEXT ·StoreInt64(SB),NOSPLIT,$0
    93  	B ·storeUint64(SB)
    94  
    95  TEXT ·StoreUint64(SB),NOSPLIT,$0
    96  	B ·storeUint64(SB)
    97  
    98  TEXT ·StoreUintptr(SB),NOSPLIT,$0
    99  	B ·StoreUint32(SB)