Write HCL code for the signals M_bubble and W_stall in the PIPE implementation. The latter signal requires modifying the exception condition listed in Figure 4.64.

Figure 4.64

Condition Processing ret Load/use hazard Mispredicted branch Exception Trigger IRET {D_icode, E_icode, M_icode} E_icode = {IMRMOVQ, IPOPQ) && E_dstM (d_srcA, d_srcB} E_icode = 1JXX && !e_Cnd m_stat (SADR, SINS, SHLT) | | W_stat (SADR, SINS, SHLT}