get_tls(R12)
	MOVQ	g(R12), R14
	MOVQ	g_m(R14), R13

	// Switch to g0 stack.
	MOVQ	SP, R12		// callee-saved, preserved across the CALL
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0
	MOVQ	(g_sched+gobuf_sp)(R10), SP
call:
	ANDQ	$~15, SP	// alignment for gcc ABI
	CALL	AX
	MOVQ	R12, SP
	RET

// void runtime·libfuzzerCallTraceIntCmp(fn, arg0, arg1, fakePC uintptr)

	MOVQ	$0, DI  	// CLOCK_REALTIME
	LEAQ	8(SP), SI
	SYSCALL
	MOVQ	8(SP), AX	// sec
	MOVQ	16(SP), DX	// nsec

	// sec is in AX, nsec in DX
	MOVQ	AX, sec+0(FP)
	MOVL	DX, nsec+8(FP)
	RET

TEXT runtime·nanotime1(SB), NOSPLIT, $32
	MOVL	$232, AX
	MOVQ	$4, DI  	// CLOCK_MONOTONIC
	LEAQ	8(SP), SI
	SYSCALL
	MOVQ	8(SP), AX	// sec
	MOVQ	16(SP), DX	// nsec

	// sec is in AX, nsec in DX

	MOVL	timebase<>+machTimebaseInfo_denom(SB), DI // atomic read
	TESTL	DI, DI
	JNE	initialized

	SUBQ	$(machTimebaseInfo__size+15)/16*16, SP
	MOVQ	SP, DI
	CALL	libc_mach_timebase_info(SB)
	MOVL	machTimebaseInfo_numer(SP), SI
	MOVL	machTimebaseInfo_denom(SP), DI
	ADDQ	$(machTimebaseInfo__size+15)/16*16, SP

	MOVL	SI, timebase<>+machTimebaseInfo_numer(SB)
	MOVL	DI, AX
	XCHGL	AX, timebase<>+machTimebaseInfo_denom(SB) // atomic write

	JMP	racecall<>(SB)

// Switches SP to g0 stack and calls (AX). Arguments already set.
TEXT	racecall<>(SB), NOSPLIT|NOFRAME, $0-0
	MOVQ	g_m(R14), R13
	// Switch to g0 stack.
	MOVQ	SP, R12		// callee-saved, preserved across the CALL
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0
	MOVQ	(g_sched+gobuf_sp)(R10), SP
call:
	ANDQ	$~15, SP	// alignment for gcc ABI
	CALL	AX
	MOVQ	R12, SP

	MOVQ	(9*8)(DI), R12	// a9
	MOVQ	(10*8)(DI), R13	// a10
	MOVQ	R10, (0*8)(SP)	// a7
	MOVQ	R11, (1*8)(SP)	// a8
	MOVQ	R12, (2*8)(SP)	// a9
	MOVQ	R13, (3*8)(SP)	// a10
	MOVQ	(0*8)(DI), R11	// fn
	MOVQ	(2*8)(DI), SI	// a2
	MOVQ	(3*8)(DI), DX	// a3
	MOVQ	(4*8)(DI), CX	// a4
	MOVQ	(5*8)(DI), R8	// a5
	MOVQ	(6*8)(DI), R9	// a6
	MOVQ	DI, (4*8)(SP)
	MOVQ	(1*8)(DI), DI	// a1
	XORL	AX, AX	     	// vararg: say "no float args"

	# Get the goroutine's saved state.
	pc, sp = ptr['sched']['pc'], ptr['sched']['sp']
	status = ptr['atomicstatus']['value']&~G_SCAN
	# Goroutine is not running nor in syscall, so use the info in goroutine
	if status != G_RUNNING and status != G_SYSCALL:
		return pc.cast(vp), sp.cast(vp)

	# If the goroutine is in a syscall, use syscallpc/sp.
	pc, sp = ptr['syscallpc'], ptr['syscallsp']
	if sp != 0:
		return pc.cast(vp), sp.cast(vp)

	case -AMOVWR:
		return SP(4, 6)
	case -AMOVVL:
		return SP(3, 2)
	case -AMOVVR:
		return SP(3, 3)
	case -AMOVB:
		return SP(4, 0)
	case -AMOVBU:
		return SP(4, 4)
	case -AMOVH:
		return SP(4, 1)
	case -AMOVHU:
		return SP(4, 5)
	case -AMOVW:
		return SP(4, 3)
	case -AMOVWU:
		return SP(4, 7)
	case -AMOVV:
		return SP(6, 7)
	case -AMOVF:

	// Save current m->g0->sched.sp on stack and then set it to SP.
	// Save current sp in m->g0->sched.sp in preparation for
	// switch back to m->curg stack.
	// NOTE: unwindm knows that the saved g->sched.sp is at 8(R29) aka savedsp-16(SP).
	MOVV	m_g0(R3), R1
	MOVV	(g_sched+gobuf_sp)(R1), R2
	MOVV	R2, savedsp-24(SP)	// must match frame size
	MOVV	R29, (g_sched+gobuf_sp)(R1)

	// Switch to m->curg stack and call runtime.cgocallbackg.

			pcoff = gp.sched.pc - f.entry()
		}
		print("runtime: newstack at ", pcname, "+", hex(pcoff),
			" sp=", hex(gp.sched.sp), " stack=[", hex(gp.stack.lo), ", ", hex(gp.stack.hi), "]\n",
			"\tmorebuf={pc:", hex(morebuf.pc), " sp:", hex(morebuf.sp), " lr:", hex(morebuf.lr), "}\n",
			"\tsched={pc:", hex(gp.sched.pc), " sp:", hex(gp.sched.sp), " lr:", hex(gp.sched.lr), " ctxt:", gp.sched.ctxt, "}\n")

		thisg.m.traceback = 2 // Include runtime frames

				{2, 255},   // AX CX DX BX SP BP SI DI
				{0, 65791}, // AX CX DX BX SP BP SI DI SB
			},
		},
	},
	{
		name:        "MOVWstoreidx1",
		auxType:     auxSymOff,
		argLen:      4,
		commutative: true,
		symEffect:   SymWrite,
		asm:         x86.AMOVW,
		reg: regInfo{
			inputs: []inputInfo{
				{1, 255},   // AX CX DX BX SP BP SI DI
				{2, 255},   // AX CX DX BX SP BP SI DI