[fpgaboy.git] / core / insn_rst.v

`define INSN_RST		9'b011xxx111

`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
e7fe9dc2 JW	1	`define INSN_RST 9'b011xxx111
e7fe9dc2 JW	2
df770340 JW	3	`ifdef EXECUTE
	4	`INSN_RST: begin
	5	case (cycle)
5c33c5c0 JW	6	0: `EXEC_INC_PC // This goes FIRST in RST
	7	1: `EXEC_WRITE(`_SP - 1, `_PCH)
	8	2: `EXEC_WRITE(`_SP - 2, `_PCL)
df770340	9	3: begin
5c33c5c0 JW	10	`EXEC_NEWCYCLE
5c33c5c0 JW	11	`_PC <= {10'b0,opcode[5:3],3'b0};
df770340 JW	12	end
	13	endcase
	14	end
	15	`endif
	16
	17	`ifdef WRITEBACK
	18	`INSN_RST: begin
	19	case (cycle)
	20	0: begin /* type F */ end
	21	1: begin /* type F */ end
	22	2: begin /* type F */ end
5c33c5c0	23	3: `_SP <= `_SP - 2;
df770340 JW	24	endcase
	25	end
	26	`endif