// Copyright 2015 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"

// func publicationBarrier()
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	FENCE

// Copyright 2022 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"

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	DBAR

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build mips64 || mips64le

#include "textflag.h"

#define SYNC	WORD $0xf

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	SYNC

// Copyright 2014 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"

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	DMB	$0xe	// DMB ST

// Copyright 2016 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.

//go:build mips || mipsle

#include "textflag.h"

TEXT ·publicationBarrier(SB),NOSPLIT,$0
	SYNC

// Copyright 2014 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.

//go:build ppc64 || ppc64le

#include "textflag.h"

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	// LWSYNC is the "export" barrier recommended by Power ISA
	// v2.07 book II, appendix B.2.2.2.
	// LWSYNC is a load/load, load/store, and store/store barrier.
	LWSYNC

// call on the stack will cause gentraceback to stop walking the stack
// prematurely and if there is leftover state it may panic.
func goexit(neverCallThisFunction)

// publicationBarrier performs a store/store barrier (a "publication"
// or "export" barrier). Some form of synchronization is required
// between initializing an object and making that object accessible to

	MOVW    $SYS_ERRSTR, R0
	SWI	$0
	MOVW	R1, R2
	MOVBU	0(R2), R0
	CMP	$0, R0
	BEQ	3(PC)
	ADD	$1, R2
	B	-4(PC)
	SUB	R1, R2
	MOVW	R2, ret_len+4(FP)
	RET

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// never called (cgo not supported)
TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	MOVW	$0, R0
	MOVW	R0, (R0)

	BL	runtime·emptyfunc(SB)	// fault if stack check is wrong
	BL	runtime·mstart(SB)

	// Exit the thread.
	MOVW	$0, R0
	MOVM.IA.W (R13), [R4-R11, R15]		// pop {r4-r11, pc}

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// never called (this is a GOARM=7 platform)
TEXT runtime·read_tls_fallback(SB),NOSPLIT,$0
	MOVW	$0xabcd, R0
	MOVW	R0, (R0)
	RET

	MOVW arg+8(FP), R2
	SWI $SYS_fcntl
	MOVW $0, R1
	MOVW.CS R0, R1
	MOVW.CS $-1, R0
	MOVW R0, ret+12(FP)
	MOVW R1, errno+16(FP)
	RET

// TODO: this is only valid for ARMv7+
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	MOVM.WP [R1, R2, R3, R12], (R13)
	SWI $SYS__lwp_getprivate