Branch Instruction misaligned can't trigger exception

[SeddonShen]

When one branch inst tries to jump to a misaligned address,
such as:

  jal x1, 2 // misaligned
  beq x1,x2, 2 // misaligned but not trigger a exception

I find in the source code decode unit that only JAL and JARL is "PC_ALU" type insts:

    JAL   -> List(PC_ALU, A_PC,   B_IMM, IMM_J, ALU_ADD   , BR_XXX, Y, ST_XXX, LD_XXX, WB_PC4, Y, CSR.N, N),
    JALR  -> List(PC_ALU, A_RS1,  B_IMM, IMM_I, ALU_ADD   , BR_XXX, Y, ST_XXX, LD_XXX, WB_PC4, Y, CSR.N, N),

And in Datapath.scala, Line 167:

     pc_check := io.ctrl.pc_sel === PC_ALU

I think it should be change to

     pc_check := (io.ctrl.pc_sel === PC_ALU) || (brCond.io.taken)

And then the Branch Instruction misaligned can be triggered