// population count
	{i: 9, as: APOPCNT, a1: C_REG, a6: C_REG},

	// compare
	{i: 70, as: ACMP, a1: C_REG, a6: C_REG},
	{i: 71, as: ACMP, a1: C_REG, a6: C_LCON},
	{i: 70, as: ACMPU, a1: C_REG, a6: C_REG},
	{i: 71, as: ACMPU, a1: C_REG, a6: C_LCON},
	{i: 70, as: AFCMPO, a1: C_FREG, a6: C_FREG},
	{i: 70, as: AFCMPO, a1: C_FREG, a2: C_REG, a6: C_FREG},

	// test under mask
	{i: 91, as: ATMHH, a1: C_REG, a6: C_ANDCON},

		v0 := b.NewValue0(v.Pos, OpS390XCMPUconst, types.TypeFlags)
		v0.AuxInt = int32ToAuxInt(int32(c))
		v0.AddArg(x)
		v.AddArg(v0)
		return true
	}
	// match: (CMPU x y)
	// cond: canonLessThan(x,y)
	// result: (InvertFlags (CMPU y x))
	for {
		x := v_0
		y := v_1
		if !(canonLessThan(x, y)) {
			break
		}
		v.reset(OpS390XInvertFlags)

retry:
	MOVD	g_m(g), R18
	MOVD	m_p(R18), R18
	MOVD	(p_wbBuf+wbBuf_next)(R18), R19
	MOVD	(p_wbBuf+wbBuf_end)(R18), R31
	// Increment wbBuf.next position.
	ADD	R29, R19
	// Is the buffer full?
	CMPU	R31, R19
	BLT	flush
	// Commit to the larger buffer.
	MOVD	R19, (p_wbBuf+wbBuf_next)(R18)
	// Make return value (the original next position)
	SUB	R29, R19, R29
	RET

flush:

				{1, 1073733630}, // SP SB R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29
			},
		},
	},
	{
		name:   "CMPU",
		argLen: 2,
		asm:    ppc64.ACMPU,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 1073733630}, // SP SB R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29