[fpgaboy.git] / insn_rst.v

`ifdef EXECUTE
	`INSN_RST: begin
		case (cycle)
		0:	`EXEC_INC_PC		// This goes FIRST in RST
		1:	`EXEC_WRITE(`_SP - 1, `_PCH)
		2:	`EXEC_WRITE(`_SP - 2, `_PCL)
		3:	begin
				`EXEC_NEWCYCLE
				`_PC <= {10'b0,opcode[5:3],3'b0};
			end
		endcase
	end
`endif

`ifdef WRITEBACK
	`INSN_RST: begin
		case (cycle)
		0:	begin /* type F */ end
		1:	begin /* type F */ end
		2:	begin /* type F */ end
		3:	`_SP <= `_SP - 2;
		endcase
	end
`endif
Commit	Line	Data
df770340 JW	1	`ifdef EXECUTE
	2	`INSN_RST: begin
	3	case (cycle)
5c33c5c0 JW	4	0: `EXEC_INC_PC // This goes FIRST in RST
	5	1: `EXEC_WRITE(`_SP - 1, `_PCH)
	6	2: `EXEC_WRITE(`_SP - 2, `_PCL)
df770340	7	3: begin
5c33c5c0 JW	8	`EXEC_NEWCYCLE
5c33c5c0 JW	9	`_PC <= {10'b0,opcode[5:3],3'b0};
df770340 JW	10	end
	11	endcase
	12	end
	13	`endif
	14
	15	`ifdef WRITEBACK
	16	`INSN_RST: begin
	17	case (cycle)
	18	0: begin /* type F */ end
	19	1: begin /* type F */ end
	20	2: begin /* type F */ end
5c33c5c0	21	3: `_SP <= `_SP - 2;
df770340 JW	22	endcase
	23	end
	24	`endif