op_umulh
name = (op == op_umulh) ? "umulh" : mul_opname[((op)>>5)&3];
OP3FUNC(op_umulh, Rm, Rn, Rd)
{ 0xffe0fc00, 0x9bc07c00, FMT_RM_RN_RD, op_umulh },