anchor.diff:  
      // ----------------------------------------------------------------
      // Scoreboard map
  -   Reg#(Bit#(2))  rg_scoreGPRs[numRegs][2];
  +   Reg#(Bool)  rg_scoreGPRs[numRegs][2];
      for(Integer i = 0; i < numRegs; i = i + 1)
  -      rg_scoreGPRs[i] <- mkCReg(2, 0);
  +      rg_scoreGPRs[i] <- mkCReg(2, False);
   
      // ----------------------------------------------------------------
      // Read a CSR
  
positive.code:          // Update dependency flag for $rd
           if (  fields.opcode7 != op_BRANCH
              && fields.opcode7 != op_STORE) begin
                 rg_scoreGPRs[fields.rd][0] <= rg_scoreGPRs[fields.rd][0] + 1;
           end
  
           fa_exec(decoded, fields);
  
negative.code:       
        case(fields.opcode7)
           op_LUI, op_AUIPC, op_JAL, op_MISC_MEM  : begin
              score1 = False;
              score2 = False;
           end
           op_JALR, op_LOAD, op_OP_IMM, op_SYSTEM : begin
              score1 = fields.rs1 != 0 ? rg_scoreGPRs[fields.rs1][1] : False;
              score2 = False;
           end
           op_BRANCH, op_OP, op_STORE : begin
              score1 = fields.rs1 != 0 ? rg_scoreGPRs[fields.rs1][1] : False;
              score2 = fields.rs2 != 0 ? rg_scoreGPRs[fields.rs2][1] : False;
           end
        endcase
  
        let score_conflict = score1 || score2;
  
        if (cfg_verbose > 1) $display("[%7d] rl_exec  : PC = 0x%08h, instr = 0x%08h", csr_cycle, decoded.pc, decoded.instr);
        if (!score_conflict && decoded.pc == pcEpoch) begin
           if (cfg_verbose > 0) $display("[%7d] fa_exec  : PC = 0x%08h, instr = 0x%08h", csr_cycle, decoded.pc, decoded.instr);
  
           if (cfg_verbose > 2) begin
              $write("[%7d] rl_exec: Scoreboard = [", csr_cycle);
              for(Integer i = 0; i < numRegs; i = i + 1) begin
                 $write("%d, ", rg_scoreGPRs[i][0] ? 1 : 0);
              end
              $write("], dst = %d, rs1 = %d, rs2 = %d\n", fields.rd, fields.rs1, fields.rs2);
           end
  