github.com/kdevb0x/go@v0.0.0-20180115030120-39687051e9e7/src/sync/atomic/asm_netbsd_arm.s (about)

     1  // Copyright 2013 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  // NetBSD/ARM atomic operations.
     8  // TODO(minux): this only supports ARMv6K or higher.
     9  
    10  TEXT ·CompareAndSwapInt32(SB),NOSPLIT,$0
    11  	B ·CompareAndSwapUint32(SB)
    12  
    13  TEXT ·CompareAndSwapUint32(SB),NOSPLIT,$0
    14  	B ·armCompareAndSwapUint32(SB)
    15  
    16  TEXT ·CompareAndSwapUintptr(SB),NOSPLIT,$0
    17  	B ·CompareAndSwapUint32(SB)
    18  
    19  TEXT ·AddInt32(SB),NOSPLIT,$0
    20  	B ·AddUint32(SB)
    21  
    22  TEXT ·AddUint32(SB),NOSPLIT,$0
    23  	B ·armAddUint32(SB)
    24  
    25  TEXT ·AddUintptr(SB),NOSPLIT,$0
    26  	B ·AddUint32(SB)
    27  
    28  TEXT ·SwapInt32(SB),NOSPLIT,$0
    29  	B ·SwapUint32(SB)
    30  
    31  TEXT ·SwapUint32(SB),NOSPLIT,$0
    32  	B ·armSwapUint32(SB)
    33  
    34  TEXT ·SwapUintptr(SB),NOSPLIT,$0
    35  	B ·SwapUint32(SB)
    36  
    37  TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
    38  	B ·CompareAndSwapUint64(SB)
    39  
    40  TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$-4
    41  	B ·armCompareAndSwapUint64(SB)
    42  
    43  TEXT ·AddInt64(SB),NOSPLIT,$0
    44  	B ·addUint64(SB)
    45  
    46  TEXT ·AddUint64(SB),NOSPLIT,$0
    47  	B ·addUint64(SB)
    48  
    49  TEXT ·SwapInt64(SB),NOSPLIT,$0
    50  	B ·swapUint64(SB)
    51  
    52  TEXT ·SwapUint64(SB),NOSPLIT,$0
    53  	B ·swapUint64(SB)
    54  
    55  TEXT ·LoadInt32(SB),NOSPLIT,$0
    56  	B ·LoadUint32(SB)
    57  
    58  TEXT ·LoadUint32(SB),NOSPLIT,$0-8
    59  	MOVW addr+0(FP), R1
    60  load32loop:
    61  	LDREX (R1), R2		// loads R2
    62  	STREX R2, (R1), R0	// stores R2
    63  	CMP $0, R0
    64  	BNE load32loop
    65  	MOVW R2, val+4(FP)
    66  	RET
    67  
    68  TEXT ·LoadInt64(SB),NOSPLIT,$0
    69  	B ·loadUint64(SB)
    70  
    71  TEXT ·LoadUint64(SB),NOSPLIT,$0
    72  	B ·loadUint64(SB)
    73  
    74  TEXT ·LoadUintptr(SB),NOSPLIT,$0
    75  	B ·LoadUint32(SB)
    76  
    77  TEXT ·LoadPointer(SB),NOSPLIT,$0
    78  	B ·LoadUint32(SB)
    79  
    80  TEXT ·StoreInt32(SB),NOSPLIT,$0
    81  	B ·StoreUint32(SB)
    82  
    83  TEXT ·StoreUint32(SB),NOSPLIT,$0-8
    84  	MOVW addr+0(FP), R1
    85  	MOVW val+4(FP), R2
    86  storeloop:
    87  	LDREX (R1), R4		// loads R4
    88  	STREX R2, (R1), R0	// stores R2
    89  	CMP $0, R0
    90  	BNE storeloop
    91  	RET
    92  
    93  TEXT ·StoreInt64(SB),NOSPLIT,$0
    94  	B ·storeUint64(SB)
    95  
    96  TEXT ·StoreUint64(SB),NOSPLIT,$0
    97  	B ·storeUint64(SB)
    98  
    99  TEXT ·StoreUintptr(SB),NOSPLIT,$0
   100  	B ·StoreUint32(SB)