`ifdef EXECUTE `INSN_ALU_EXT: begin if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0)) `EXEC_READ(`_HL) else begin `EXEC_INC_PC case (opcode[2:0]) `INSN_reg_A: tmp <= `_A; `INSN_reg_B: tmp <= `_B; `INSN_reg_C: tmp <= `_C; `INSN_reg_D: tmp <= `_D; `INSN_reg_E: tmp <= `_E; `INSN_reg_H: tmp <= `_H; `INSN_reg_L: tmp <= `_L; `INSN_reg_dHL: tmp <= rdata; endcase end end `endif `ifdef WRITEBACK `INSN_ALU_EXT: begin if (opcode[2:0] == `INSN_reg_dHL) begin if(cycle == 0) begin end else if(cycle == 1) begin `EXEC_WRITE(`_HL, alu_res) end else begin `EXEC_NEWCYCLE end end else begin case(opcode[2:0]) `INSN_reg_B: `_B <= alu_res; `INSN_reg_C: `_C <= alu_res; `INSN_reg_D: `_D <= alu_res; `INSN_reg_E: `_E <= alu_res; `INSN_reg_H: `_H <= alu_res; `INSN_reg_L: `_L <= alu_res; `INSN_reg_A: `_A <= alu_res; `INSN_reg_dHL: begin end /* eat dicks */ endcase `_F <= {f_res,`_F[3:0]}; `EXEC_NEWCYCLE end end `endif