1// Copyright 2015 The Go Authors. All rights reserved.2// Use of this source code is governed by a BSD-style3// license that can be found in the LICENSE file.45//go:build !linux67#include "textflag.h"89// TODO(minux): this is only valid for ARMv6+10// func armcas(ptr *int32, old int32, new int32) bool11// Atomically:12//	if *ptr == old {13//		*ptr = new14//		return true15//	} else {16//		return false17//	}18TEXT	·Cas(SB),NOSPLIT,$019	JMP	·armcas(SB)2021// Non-linux OSes support only single processor machines before ARMv7.22// So we don't need memory barriers if goarm < 7. And we fail loud at23// startup (runtime.checkgoarm) if it is a multi-processor but goarm < 7.2425TEXT	·Load(SB),NOSPLIT|NOFRAME,$0-826	MOVW	addr+0(FP), R027	MOVW	(R0), R12829	MOVB	runtime·goarm(SB), R1130	CMP	$7, R1131	BLT	2(PC)32	DMB	MB_ISH3334	MOVW	R1, ret+4(FP)35	RET3637TEXT	·Store(SB),NOSPLIT,$0-838	MOVW	addr+0(FP), R139	MOVW	v+4(FP), R24041	MOVB	runtime·goarm(SB), R842	CMP	$7, R843	BLT	2(PC)44	DMB	MB_ISH4546	MOVW	R2, (R1)4748	CMP	$7, R849	BLT	2(PC)50	DMB	MB_ISH51	RET5253TEXT	·Load8(SB),NOSPLIT|NOFRAME,$0-554	MOVW	addr+0(FP), R055	MOVB	(R0), R15657	MOVB	runtime·goarm(SB), R1158	CMP	$7, R1159	BLT	2(PC)60	DMB	MB_ISH6162	MOVB	R1, ret+4(FP)63	RET6465TEXT	·Store8(SB),NOSPLIT,$0-566	MOVW	addr+0(FP), R167	MOVB	v+4(FP), R26869	MOVB	runtime·goarm(SB), R870	CMP	$7, R871	BLT	2(PC)72	DMB	MB_ISH7374	MOVB	R2, (R1)7576	CMP	$7, R877	BLT	2(PC)78	DMB	MB_ISH79	RET