//	}
	SLL	R1, R2

	//	LSHW imm ',' sreg ',' rreg
	//	{
	//		outcode(int($1), &$2, int($4), &$6);
	//	}
	SLL	$4, R1, R2

	//	LSHW imm ',' rreg
	//	{
	//		outcode(int($1), &$2, 0, &$4);
	//	}
	SLL	$4, R1

	//
	// move immediate: macro for lui+or, addi, addis, and other combinations
	//
	//	LMOVW imm ',' rreg
	//	{
	//		outcode(int($1), &$2, 0, &$4);
	//	}

32-bit variant ldr => MOVWU;
ldrb => MOVBU; ldrh => MOVHU;
ldrsb, sturb, strb => MOVB;
ldrsh, sturh, strh =>  MOVH.

4. Go moves conditions into opcode suffix, like BLT.

5. Go adds a V prefix for most floating-point and SIMD instructions, except cryptographic extension
instructions and floating-point(scalar) instructions.

Examples:

	VADD V5.H8, V18.H8, V9.H8         <=>      add v9.8h, v18.8h, v5.8h

// type S = R // disallowed for now

type Sint = R[int]

// type Simp = a.Rimp // disallowed for now

// type SimpString Simp[string] // disallowed for now
type SimpString a.Rimp[string]

func main() {
	// var s S[int] // disallowed for now
	var s R[int]
	if s.F != 0 {
		panic(s.F)
	}
	var s2 Sint
	if s2.F != 0 {
		panic(s2.F)
	}
	// var s3 Simp[string] // disallowed for now
	var s3 a.Rimp[string]
	if s3.F != "" {

		pkeys = append(pkeys, k)
	}
	// Remove anything from pmm not found in imm. We don't need to
	// go the other way (removing things from imm not found in pmm)
	// since we don't add anything to imm if there is no pmm entry.
	for _, k := range pkeys {
		if _, found := s.imm[k]; !found {
			delete(s.mm.pod.pmm, k)
		}
	}
	s.imm = nil
}

	Comment("Second reduction chain (carryPropagate)")
	// c0 = r0 >> 51
	MOVQ(r0lo, c0)
	SHRQ(Imm(51), c0)
	// c1 = r1 >> 51
	MOVQ(r1lo, c1)
	SHRQ(Imm(51), c1)
	// c2 = r2 >> 51
	MOVQ(r2lo, c2)
	SHRQ(Imm(51), c2)
	// c3 = r3 >> 51
	MOVQ(r3lo, c3)
	SHRQ(Imm(51), c3)
	// c4 = r4 >> 51
	MOVQ(r4lo, c4)
	SHRQ(Imm(51), c4)
	maskAndAdd(r0lo, maskLow51Bits, c4, 19)
	maskAndAdd(r1lo, maskLow51Bits, c0, 1)

type Label uint32

func (Label) IsArg() {}
func (l Label) String() string {
	return fmt.Sprintf("%#x", uint32(l))
}

// Imm represents an immediate number.
type Imm int64

func (Imm) IsArg() {}
func (i Imm) String() string {
	return fmt.Sprintf("%d", int32(i))
}

// Offset represents a memory offset immediate.
type Offset int64

func (Offset) IsArg() {}

}

// An Imm is an integer constant.
type Imm uint32

func (Imm) IsArg() {}

func (i Imm) String() string {
	return fmt.Sprintf("#%#x", uint32(i))
}

// An ImmAlt is an alternate encoding of an integer constant.
type ImmAlt struct {
	Val uint8
	Rot uint8
}

func (ImmAlt) IsArg() {}

func (i ImmAlt) Imm() Imm {
	v := uint32(i.Val)
	r := uint(i.Rot)

	// get the facilities list
	facilities := stfle()

	// mandatory
	S390X.HasZARCH = facilities.Has(zarch)
	S390X.HasSTFLE = facilities.Has(stflef)
	S390X.HasLDISP = facilities.Has(ldisp)
	S390X.HasEIMM = facilities.Has(eimm)

	// optional
	S390X.HasETF3EH = facilities.Has(etf3eh)
	S390X.HasDFP = facilities.Has(dfp)
	S390X.HasMSA = facilities.Has(msa)
	S390X.HasVX = facilities.Has(vx)
	if S390X.HasVX {

github.com/klauspost/cpuid/v2 v2.2.7 h1:ZWSB3igEs+d0qvnxR/ZBzXVmxkgt8DdzP6m9pfuVLDM=
github.com/klauspost/cpuid/v2 v2.2.7/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws=
github.com/minio/md5-simd v1.1.2 h1:Gdi1DZK69+ZVMoNHRXJyNcxrMA4dSxoYHZSQbirFg34=
github.com/minio/md5-simd v1.1.2/go.mod h1:MzdKDxYpY2BT9XQFocsiZf/NKVtR7nkE4RoEpN+20RM=
github.com/minio/minio-go/v7 v7.0.70 h1:1u9NtMgfK1U42kUxcsl5v0yj6TEOPR497OAQxpJnn2g=

	github.com/goccy/go-json v0.10.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	github.com/klauspost/compress v1.17.8 // indirect
	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
	github.com/minio/md5-simd v1.1.2 // indirect
	github.com/rs/xid v1.5.0 // indirect
	github.com/stretchr/testify v1.7.0 // indirect
	golang.org/x/crypto v0.23.0 // indirect
	golang.org/x/net v0.25.0 // indirect
	golang.org/x/sys v0.20.0 // indirect