(CMP x (MOVDconst [c])) && is16Bit(c) => (CMPconst x [c])
(CMP (MOVDconst [c]) y) && is16Bit(c) => (InvertFlags (CMPconst y [c]))
(CMPW x (MOVDconst [c])) && is16Bit(c) => (CMPWconst x [int32(c)])
(CMPW (MOVDconst [c]) y) && is16Bit(c) => (InvertFlags (CMPWconst y [int32(c)]))

(CMPU x (MOVDconst [c])) && isU16Bit(c) => (CMPUconst x [c])
(CMPU (MOVDconst [c]) y) && isU16Bit(c) => (InvertFlags (CMPUconst y [c]))

	v_1 := v.Args[1]
	v_0 := v.Args[0]
	b := v.Block
	// match: (CMP x (MOVDconst [c]))
	// cond: is16Bit(c)
	// result: (CMPconst x [c])
	for {
		x := v_0
		if v_1.Op != OpPPC64MOVDconst {
			break
		}
		c := auxIntToInt64(v_1.AuxInt)
		if !(is16Bit(c)) {
			break
		}
		v.reset(OpPPC64CMPconst)
		v.AuxInt = int64ToAuxInt(c)
		v.AddArg(x)
		return true
	}

}

// is32Bit reports whether n can be represented as a signed 32 bit integer.
func is32Bit(n int64) bool {
	return n == int64(int32(n))
}

// is16Bit reports whether n can be represented as a signed 16 bit integer.
func is16Bit(n int64) bool {
	return n == int64(int16(n))
}

// is8Bit reports whether n can be represented as a signed 8 bit integer.
func is8Bit(n int64) bool {