((CMPWconst|CMNWconst) [c] y) && c < 0 && c != -1<<31 => ((CMNWconst|CMPWconst) [-c] y)

((EQ|NE) (CMPconst  [0] x) yes no) => ((Z|NZ)   x yes no)
((EQ|NE) (CMPWconst [0] x) yes no) => ((ZW|NZW) x yes no)

((EQ|NE|LT|LE|GT|GE) (CMPconst  [0] z:(MADD a x y))  yes no) && z.Uses==1 => ((EQ|NE|LTnoov|LEnoov|GTnoov|GEnoov) (CMN  a (MUL  <x.Type> x y)) yes no)

	// match: (CMPW x (MOVDconst [c]))
	// result: (CMPWconst [int32(c)] x)
	for {
		x := v_0
		if v_1.Op != OpARM64MOVDconst {
			break
		}
		c := auxIntToInt64(v_1.AuxInt)
		v.reset(OpARM64CMPWconst)
		v.AuxInt = int32ToAuxInt(int32(c))
		v.AddArg(x)
		return true
	}
	// match: (CMPW (MOVDconst [c]) x)
	// result: (InvertFlags (CMPWconst [int32(c)] x))
	for {

(EQ (InvertFlags cmp) yes no) => (EQ cmp yes no)
(NE (InvertFlags cmp) yes no) => (NE cmp yes no)

// constant comparisons
(CMPWconst (MOVDconst [x]) [y]) && int32(x)==int32(y) => (FlagEQ)
(CMPWconst (MOVDconst [x]) [y]) && int32(x)<int32(y)  => (FlagLT)
(CMPWconst (MOVDconst [x]) [y]) && int32(x)>int32(y)  => (FlagGT)

(CMPconst (MOVDconst [x]) [y]) && x==y => (FlagEQ)
(CMPconst (MOVDconst [x]) [y]) && x<y  => (FlagLT)

	v_0 := v.Args[0]
	// match: (CMPWconst (MOVDconst [x]) [y])
	// cond: int32(x)==int32(y)
	// result: (FlagEQ)
	for {
		y := auxIntToInt32(v.AuxInt)
		if v_0.Op != OpPPC64MOVDconst {
			break
		}
		x := auxIntToInt64(v_0.AuxInt)
		if !(int32(x) == int32(y)) {
			break
		}
		v.reset(OpPPC64FlagEQ)
		return true
	}
	// match: (CMPWconst (MOVDconst [x]) [y])

		{name: "CMPconst", argLength: 1, reg: gp1cr, asm: "CMP", aux: "Int64", typ: "Flags"},
		{name: "CMPUconst", argLength: 1, reg: gp1cr, asm: "CMPU", aux: "Int64", typ: "Flags"},
		{name: "CMPWconst", argLength: 1, reg: gp1cr, asm: "CMPW", aux: "Int32", typ: "Flags"},
		{name: "CMPWUconst", argLength: 1, reg: gp1cr, asm: "CMPWU", aux: "Int32", typ: "Flags"},

		// ISEL  arg2 ? arg0 : arg1
		// ISELZ arg1 ? arg0 : $0

		{name: "CMPW", argLength: 2, reg: gp2flags, asm: "CMPW", typ: "Flags"},                    // arg0 compare to arg1, 32 bit
		{name: "CMPWconst", argLength: 1, reg: gp1flags, asm: "CMPW", aux: "Int32", typ: "Flags"}, // arg0 compare to auxInt, 32 bit

		auxType: auxInt32,
		argLen:  1,
		asm:     x86.ACMPL,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 255}, // AX CX DX BX SP BP SI DI
			},
		},
	},
	{
		name:    "CMPWconst",
		auxType: auxInt16,
		argLen:  1,
		asm:     x86.ACMPW,
		reg: regInfo{
			inputs: []inputInfo{
				{0, 255}, // AX CX DX BX SP BP SI DI
			},
		},
	},
	{