X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/efc8cc5dd78c9126c9e3ced9be2c99c6b962703a..5c83453744afce2e0415f839e8274156b69df83e:/core/insn_ld_nn_sp.v

diff --git a/core/insn_ld_nn_sp.v b/core/insn_ld_nn_sp.v
new file mode 100644
index 0000000..ade83fe
--- /dev/null
+++ b/core/insn_ld_nn_sp.v
@@ -0,0 +1,39 @@
+`define INSN_LD_NN_SP		9'b000001000
+
+`ifdef EXECUTE
+	`INSN_LD_NN_SP: begin
+		case (cycle)
+		0:	begin
+				`EXEC_INC_PC
+				`EXEC_READ(`_PC + 16'h0001)
+			end
+		1:	begin
+				`EXEC_INC_PC
+				`EXEC_READ(`_PC + 16'h0001)
+			end
+		2:	begin
+				`EXEC_WRITE(({tmp, rdata}), `_SPL)
+			end
+		3:	begin
+				`EXEC_WRITE(({tmp, tmp2}), `_SPH)
+			end
+		4:	begin
+				`EXEC_NEWCYCLE
+				`EXEC_INC_PC
+			end
+		endcase
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_LD_NN_SP: begin
+		case (cycle)
+		0:	begin end
+		1:	tmp <= rdata;
+		2:	{tmp, tmp2} <= {tmp, rdata} + 1;
+		3:	begin end
+		4:	begin end
+		endcase
+	end
+`endif
+