MOVV	gobuf_pc(R3), R4
	JMP	(R4)

// void mcall(fn func(*g))
// Switch to m->g0's stack, call fn(g).
// Fn must never return. It should gogo(&g->sched)
// to keep running g.
TEXT runtime·mcall(SB), NOSPLIT|NOFRAME, $0-8
	// Save caller state in g->sched
	MOVV	R29, (g_sched+gobuf_sp)(g)
	MOVV	R31, (g_sched+gobuf_pc)(g)
	MOVV	R0, (g_sched+gobuf_lr)(g)

	// Switch to m->g0 & its stack, call fn.
	MOVV	g, R1

	MOV	buf+0(FP), T0
	MOV	gobuf_g(T0), T1
	MOV	0(T1), ZERO // make sure g != nil
	JMP	gogo<>(SB)

TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
	MOV	T1, g
	CALL	runtime·save_g(SB)

	MOV	gobuf_sp(T0), X2
	MOV	gobuf_lr(T0), RA
	MOV	gobuf_ret(T0), A0
	MOV	gobuf_ctxt(T0), CTXT
	MOV	ZERO, gobuf_sp(T0)
	MOV	ZERO, gobuf_ret(T0)
	MOV	ZERO, gobuf_lr(T0)
	MOV	ZERO, gobuf_ctxt(T0)

	MOVD	buf+0(FP), R5
	MOVD	gobuf_g(R5), R6
	MOVD	0(R6), R7	// make sure g != nil
	BR	gogo<>(SB)

TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
	MOVD	R6, g
	BL	runtime·save_g(SB)

	MOVD	0(g), R4
	MOVD	gobuf_sp(R5), R15
	MOVD	gobuf_lr(R5), LR
	MOVD	gobuf_ret(R5), R3
	MOVD	gobuf_ctxt(R5), R12
	MOVD	$0, gobuf_sp(R5)
	MOVD	$0, gobuf_ret(R5)
	MOVD	$0, gobuf_lr(R5)
	MOVD	$0, gobuf_ctxt(R5)

	MOVV	buf+0(FP), R4
	MOVV	gobuf_g(R4), R5
	MOVV	0(R5), R0	// make sure g != nil
	JMP	gogo<>(SB)

TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
	MOVV	R5, g
	JAL	runtime·save_g(SB)

	MOVV	gobuf_sp(R4), R3
	MOVV	gobuf_lr(R4), R1
	MOVV	gobuf_ret(R4), R19
	MOVV	gobuf_ctxt(R4), REGCTXT
	MOVV	R0, gobuf_sp(R4)
	MOVV	R0, gobuf_ret(R4)
	MOVV	R0, gobuf_lr(R4)
	MOVV	R0, gobuf_ctxt(R4)

	MOVW	buf+0(FP), R3
	MOVW	gobuf_g(R3), R4
	MOVW	0(R4), R5	// make sure g != nil
	JMP	gogo<>(SB)

TEXT gogo<>(SB),NOSPLIT|NOFRAME,$0
	MOVW	R4, g
	JAL	runtime·save_g(SB)
	MOVW	gobuf_sp(R3), R29
	MOVW	gobuf_lr(R3), R31
	MOVW	gobuf_ret(R3), R1
	MOVW	gobuf_ctxt(R3), REGCTXT
	MOVW	R0, gobuf_sp(R3)
	MOVW	R0, gobuf_ret(R3)
	MOVW	R0, gobuf_lr(R3)
	MOVW	R0, gobuf_ctxt(R3)
	MOVW	gobuf_pc(R3), R4

TEXT runtime·gogo(SB),NOSPLIT|NOFRAME,$0-4
	MOVW	buf+0(FP), R1
	MOVW	gobuf_g(R1), R0
	MOVW	0(R0), R2	// make sure g != nil
	B	gogo<>(SB)

TEXT gogo<>(SB),NOSPLIT|NOFRAME,$0
	BL	setg<>(SB)
	MOVW	gobuf_sp(R1), R13	// restore SP==R13
	MOVW	gobuf_lr(R1), LR
	MOVW	gobuf_ret(R1), R0
	MOVW	gobuf_ctxt(R1), R7
	MOVW	$0, R11
	MOVW	R11, gobuf_sp(R1)	// clear to help garbage collector
	MOVW	R11, gobuf_ret(R1)

	BL	runtime·abort(SB)

	// Called from f.
	// Set m->morebuf to f's caller.
	MOVD	R5, (m_morebuf+gobuf_pc)(R7)	// f's caller's PC
	MOVD	R1, (m_morebuf+gobuf_sp)(R7)	// f's caller's SP
	MOVD	g, (m_morebuf+gobuf_g)(R7)

	// Call newstack on m->g0's stack.
	MOVD	m_g0(R7), g
	BL	runtime·save_g(SB)
	MOVD	(g_sched+gobuf_sp)(g), R1
	MOVDU   R0, -(FIXED_FRAME+0)(R1)	// create a call frame on g0
	BL	runtime·newstack(SB)

	MOVD	buf+0(FP), R5
	MOVD	gobuf_g(R5), R6
	MOVD	0(R6), R4	// make sure g != nil
	B	gogo<>(SB)

TEXT gogo<>(SB), NOSPLIT|NOFRAME, $0
	MOVD	R6, g
	BL	runtime·save_g(SB)

	MOVD	gobuf_sp(R5), R0
	MOVD	R0, RSP
	MOVD	gobuf_bp(R5), R29
	MOVD	gobuf_lr(R5), LR
	MOVD	gobuf_ret(R5), R0
	MOVD	gobuf_ctxt(R5), R26
	MOVD	$0, gobuf_sp(R5)
	MOVD	$0, gobuf_bp(R5)
	MOVD	$0, gobuf_ret(R5)

	MOVD buf+0(FP), R0
	MOVD gobuf_g(R0), R1
	MOVD 0(R1), R2	// make sure g != nil
	MOVD R1, g
	MOVD gobuf_sp(R0), SP

	// Put target PC at -8(SP), wasm_pc_f_loop will pick it up
	Get SP
	I32Const $8
	I32Sub
	I64Load gobuf_pc(R0)
	I64Store $0

	MOVD gobuf_ret(R0), RET0
	MOVD gobuf_ctxt(R0), CTXT
	// clear to help garbage collector
	MOVD $0, gobuf_sp(R0)
	MOVD $0, gobuf_ret(R0)

	MOVQ	(g_sched+gobuf_sp)(DX), SP

	// call target function
	MOVQ	DI, DX
	MOVQ	0(DI), DI
	CALL	DI

	// switch back to g
	get_tls(CX)
	MOVQ	g(CX), AX
	MOVQ	g_m(AX), BX
	MOVQ	m_curg(BX), AX
	MOVQ	AX, g(CX)
	MOVQ	(g_sched+gobuf_sp)(AX), SP
	MOVQ	(g_sched+gobuf_bp)(AX), BP
	MOVQ	$0, (g_sched+gobuf_sp)(AX)
	MOVQ	$0, (g_sched+gobuf_bp)(AX)
	RET

noswitch: