[fpgaboy.git] / insn_ldx_ahl.v

`ifdef EXECUTE
	`INSN_LDx_AHL: begin
		case (cycle)
		0:	if (opcode[3])		// LDx A, (HL)
				`EXEC_READ(`_HL)
			else
				`EXEC_WRITE(`_HL, `_A)
		1:	begin
				`EXEC_NEWCYCLE
				`EXEC_INC_PC
			end
		endcase
	end
`endif

`ifdef WRITEBACK
	`INSN_LDx_AHL: begin
		case (cycle)
		0:	begin /* Type F */ end
		1:	begin
				if (opcode[3])
					`_A <= rdata;
				`_HL <= opcode[4] ? // if set, LDD, else LDI
					(`_HL - 1) :
					(`_HL + 1);
			end
		endcase
	end
`endif
Commit	Line	Data
3ad960bd JW	1	`ifdef EXECUTE
	2	`INSN_LDx_AHL: begin
	3	case (cycle)
5c33c5c0 JW	4	0: if (opcode[3]) // LDx A, (HL)
	5	`EXEC_READ(`_HL)
	6	else
	7	`EXEC_WRITE(`_HL, `_A)
3ad960bd	8	1: begin
5c33c5c0 JW	9	`EXEC_NEWCYCLE
5c33c5c0 JW	10	`EXEC_INC_PC
3ad960bd JW	11	end
	12	endcase
	13	end
	14	`endif
	15
	16	`ifdef WRITEBACK
	17	`INSN_LDx_AHL: begin
	18	case (cycle)
	19	0: begin /* Type F */ end
	20	1: begin
	21	if (opcode[3])
5c33c5c0 JW	22	`_A <= rdata;
	23	`_HL <= opcode[4] ? // if set, LDD, else LDI
	24	(`_HL - 1) :
	25	(`_HL + 1);
3ad960bd JW	26	end
	27	endcase
	28	end
	29	`endif