insn_ld_reg_imm8.v

   1 `ifdef EXECUTE
   2         `INSN_LD_reg_imm8: begin
   3                 case (cycle)
   4                 0:      begin
   5                                 `EXEC_INC_PC;
   6                                 `EXEC_NEXTADDR_PCINC;
   7                                 rd <= 1;
   8                         end
   9                 1:      begin
  10                                 `EXEC_INC_PC;
  11                                 if (opcode[5:3] == `INSN_reg_dHL) begin
  12                                         address <= {registers[`REG_H], registers[`REG_L]};
  13                                         wdata <= rdata;
  14                                         rd <= 0;
  15                                         wr <= 1;
  16                                 end else begin
  17                                         `EXEC_NEWCYCLE;
  18                                 end
  19                         end
  20                 2:      begin
  21                                 `EXEC_NEWCYCLE;
  22                         end
  23                 endcase
  24         end
  25 `endif
  26
  27 `ifdef WRITEBACK
  28         `INSN_LD_reg_imm8:
  29                 case (cycle)
  30                 0:      begin end
  31                 1:      case (opcode[5:3])
  32                         `INSN_reg_A:    begin registers[`REG_A] <= rdata; end
  33                         `INSN_reg_B:    begin registers[`REG_B] <= rdata; end
  34                         `INSN_reg_C:    begin registers[`REG_C] <= rdata; end
  35                         `INSN_reg_D:    begin registers[`REG_D] <= rdata; end
  36                         `INSN_reg_E:    begin registers[`REG_E] <= rdata; end
  37                         `INSN_reg_H:    begin registers[`REG_H] <= rdata; end
  38                         `INSN_reg_L:    begin registers[`REG_L] <= rdata; end
  39                         `INSN_reg_dHL:  begin /* Go off to cycle 2 */ end
  40                         endcase
  41                 2:      begin end
  42                 endcase
  43 `endif