[fpgaboy.git] / core / insn_ldhl_sp_imm8.v

`define INSN_LDHL_SP_IMM8		9'b011111000

`ifdef EXECUTE
	`INSN_LDHL_SP_IMM8: begin
		case (cycle)
		0:	begin
				`EXEC_INC_PC
			end
		1:	begin
				`EXEC_READ(`_PC)
			end
		2:	begin
				`EXEC_NEWCYCLE
				`EXEC_INC_PC
			end
		endcase
	end
`endif

`ifdef WRITEBACK
	`INSN_LDHL_SP_IMM8: begin
		case (cycle)
		2:	begin
				`_HL <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
				`_F <= {
					2'b00,
					(({1'b0,`_SPL[3:0]} + {1'b0,rdata[3:0]}) & 5'h10) ? 1'b1 : 1'b0,
					(({1'b0,`_SPL} + {1'b0,rdata}) & 9'h100) ? 1'b1 : 1'b0,
					`_F[3:0]
					};
			end
		endcase
	end
`endif
Commit	Line	Data
41341eb3 JW	1	`define INSN_LDHL_SP_IMM8 9'b011111000
	2
	3	`ifdef EXECUTE
	4	`INSN_LDHL_SP_IMM8: begin
	5	case (cycle)
	6	0: begin
	7	`EXEC_INC_PC
	8	end
	9	1: begin
	10	`EXEC_READ(`_PC)
	11	end
	12	2: begin
	13	`EXEC_NEWCYCLE
	14	`EXEC_INC_PC
	15	end
	16	endcase
	17	end
	18	`endif
	19
	20	`ifdef WRITEBACK
	21	`INSN_LDHL_SP_IMM8: begin
	22	case (cycle)
4c90390a JW	23	2: begin
	24	`_HL <= `_SP + {rdata[7] ? 8'hFF : 8'h00, rdata};
	25	`_F <= {
	26	2'b00,
	27	(({1'b0,`_SPL[3:0]} + {1'b0,rdata[3:0]}) & 5'h10) ? 1'b1 : 1'b0,
	28	(({1'b0,`_SPL} + {1'b0,rdata}) & 9'h100) ? 1'b1 : 1'b0,
	29	`_F[3:0]
	30	};
	31	end
41341eb3 JW	32	endcase
	33	end
	34	`endif