[fpgaboy.git] / insn_ldbcde_a.v

`ifdef EXECUTE
	`INSN_LDBCDE_A: begin
		case (cycle)
		0:	if (opcode[3]) begin
				if (opcode[4]) begin `EXEC_READ(`_DE) end
				else begin `EXEC_READ(`_BC) end
			end else begin
				if (opcode[4]) begin `EXEC_WRITE(`_DE, `_A) end
				else begin `EXEC_WRITE(`_BC, `_A) end
			end
		1:	begin
				`EXEC_INC_PC
				`EXEC_NEWCYCLE
			end
		endcase
	end
`endif

`ifdef WRITEBACK
	`INSN_LDBCDE_A: begin
		case (cycle)
		0:	begin end
		1:	if (opcode[3]) `_A <= rdata;
		endcase
	end
`endif
Commit	Line	Data
4fd47c85 JW	1	`ifdef EXECUTE
	2	`INSN_LDBCDE_A: begin
	3	case (cycle)
	4	0: if (opcode[3]) begin
	5	if (opcode[4]) begin `EXEC_READ(`_DE) end
	6	else begin `EXEC_READ(`_BC) end
	7	end else begin
	8	if (opcode[4]) begin `EXEC_WRITE(`_DE, `_A) end
	9	else begin `EXEC_WRITE(`_BC, `_A) end
	10	end
	11	1: begin
	12	`EXEC_INC_PC
	13	`EXEC_NEWCYCLE
	14	end
	15	endcase
	16	end
	17	`endif
	18
	19	`ifdef WRITEBACK
	20	`INSN_LDBCDE_A: begin
	21	case (cycle)
	22	0: begin end
	23	1: if (opcode[3]) `_A <= rdata;
	24	endcase
	25	end
	26	`endif