(MOVDload [off] {sym} ptr (FMOVDstore [off] {sym} ptr x _)) => (MFVSRD x)
(FMOVDload [off] {sym} ptr (MOVDstore [off] {sym} ptr x _)) => (MTVSRD x)

(FMOVDstore [off] {sym} ptr (MTVSRD x) mem) => (MOVDstore [off] {sym} ptr x mem)
(MOVDstore [off] {sym} ptr (MFVSRD x) mem) => (FMOVDstore [off] {sym} ptr x mem)

	CMP     R8, R4
	BGE     loopexit        // Already at end?

	// vectorize if len(z) is >=3, else jump to scalar loop
	CMP     R4, $3
	BLT     scalar
	MTVSRD  R9, VS38        // s
	VSPLTB  $7, V6, V4
	MTVSRD  R5, VS39        // ŝ
	VSPLTB  $7, V7, V2
	ADD     $-2, R4, R16
	PCALIGN $16
loopback:
	ADD     $-1, R8, R10
	SLD     $3, R10
	LXVD2X  (R6)(R10), VS32 // load x[i-1], x[i]

	NOR	R3,R3,R3  // ^crc
	MOVWZ	R3,R3	// 32 bits
	VXOR	zeroes,zeroes,zeroes  // clear the V reg
	VSPLTISW $-1,V0
	VSLDOI	$4,V29,V0,mask_32bit
	VSLDOI	$8,V29,V0,mask_64bit

	VXOR	V8,V8,V8
	MTVSRD	R3,VS40	// crc initial value VS40 = V8

#ifdef REFLECT
	VSLDOI	$8,zeroes,V8,V8  // or: VSLDOI V29,V8,V27,4 for top 32 bits?
#else
	VSLDOI	$4,V8,zeroes,V8
#endif

#ifdef BYTESWAP_DATA

		// the word-load instructions.  (Xi2f64 (MOVDload ptr )) can be (FMOVDload ptr)

		{name: "MFVSRD", argLength: 1, reg: fpgp, asm: "MFVSRD", typ: "Int64"},   // move 64 bits of F register into G register
		{name: "MTVSRD", argLength: 1, reg: gpfp, asm: "MTVSRD", typ: "Float64"}, // move 64 bits of G register into F register

	// result: (MFVSRD (FCTIWZ x))
	for {
		x := v_0
		v.reset(OpPPC64MFVSRD)
		v0 := b.NewValue0(v.Pos, OpPPC64FCTIWZ, typ.Float64)
		v0.AddArg(x)
		v.AddArg(v0)
		return true
	}
}
func rewriteValuePPC64_OpCvt64Fto64(v *Value) bool {
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (Cvt64Fto64 x)
	// result: (MFVSRD (FCTIDZ x))
	for {
		x := v_0

			outputs: []outputInfo{
				{0, 1073733624}, // 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:   "MTVSRD",
		argLen: 1,
		asm:    ppc64.AMTVSRD,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 1073733624}, // 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
			},