X-Git-Url: http://git.joshuawise.com/fpgaboy.git/blobdiff_plain/77ab69d7bb0902e6ebf0994159ed2205f8413e34..b057a5d6e6db6db06ae33703ca72cd235eec91d6:/core/insn_pop_reg.v

diff --git a/core/insn_pop_reg.v b/core/insn_pop_reg.v
new file mode 100644
index 0000000..5a7da08
--- /dev/null
+++ b/core/insn_pop_reg.v
@@ -0,0 +1,37 @@
+`ifdef EXECUTE
+	`INSN_POP_reg: begin	/* POP is 12 cycles! */
+		case (cycle)
+		0:	`EXEC_READ(`_SP)
+		1:	`EXEC_READ(`_SP + 1)
+		2:	begin
+				`EXEC_NEWCYCLE
+				`EXEC_INC_PC
+			end
+		endcase
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_POP_reg: begin	/* POP is 12 cycles! */
+		case (cycle)
+		0:	begin end
+		1:	begin
+				case (opcode[5:4])
+				`INSN_stack_AF:	`_F <= rdata;
+				`INSN_stack_BC:	`_C <= rdata;
+				`INSN_stack_DE:	`_E <= rdata;
+				`INSN_stack_HL:	`_L <= rdata;
+				endcase
+			end
+		2:	begin
+				case (opcode[5:4])
+				`INSN_stack_AF:	`_A <= rdata;
+				`INSN_stack_BC:	`_B <= rdata;
+				`INSN_stack_DE:	`_D <= rdata;
+				`INSN_stack_HL:	`_H <= rdata;
+				endcase
+				`_SP <= `_SP + 2;
+			end
+		endcase
+	end
+`endif