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

diff --git a/core/insn_bit.v b/core/insn_bit.v
new file mode 100644
index 0000000..379215e
--- /dev/null
+++ b/core/insn_bit.v
@@ -0,0 +1,31 @@
+`ifdef EXECUTE
+	`INSN_BIT: begin
+		if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 0)) begin
+			`EXEC_READ(`_HL)
+		end else if ((opcode[2:0] == `INSN_reg_dHL) && (cycle == 2)) begin
+			`EXEC_NEWCYCLE
+		end else begin
+			`EXEC_INC_PC
+			case (opcode[2:0])
+			`INSN_reg_A:	tmp <= `_A;
+			`INSN_reg_B:	tmp <= `_B;
+			`INSN_reg_C:	tmp <= `_C;
+			`INSN_reg_D:	tmp <= `_D;
+			`INSN_reg_E:	tmp <= `_E;
+			`INSN_reg_H:	tmp <= `_H;
+			`INSN_reg_L:	tmp <= `_L;
+			`INSN_reg_dHL:	tmp <= rdata;
+			endcase
+			if (opcode[2:0] != `INSN_reg_dHL) begin
+				`EXEC_NEWCYCLE
+			end
+		end
+	end
+`endif
+
+`ifdef WRITEBACK
+	`INSN_BIT: begin
+		if ((opcode[2:0] != `INSN_reg_dHL) || (cycle == 1))
+			`_F <= {~tmp[opcode[5:3]], 2'b01, `_F[4:0]};
+	end
+`endif