func rewriteValueS390X_OpAtomicAnd8(v *Value) bool {
	v_2 := v.Args[2]
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (AtomicAnd8 ptr val mem)
	// result: (LANfloor ptr (RLL <typ.UInt32> (ORWconst <typ.UInt32> val [-1<<8]) (RXSBG <typ.UInt32> {s390x.NewRotateParams(59, 60, 3)} (MOVDconst [3<<3]) ptr)) mem)
	for {
		ptr := v_0
		val := v_1
		mem := v_2
		v.reset(OpS390XLANfloor)