Add RTL files

Signed-off-by: Warrick Lo <wlo@warricklo.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/rtl/alu.sv b/rtl/alu.sv
new file mode 100644
index 0000000..c6d00bd
--- /dev/null
+++ b/rtl/alu.sv
@@ -0,0 +1,17 @@
+module ALU(Ain, Bin, op, out, status);
+	input [1:0] op;
+	input [15:0] Ain, Bin;
+	output [2:0] status;
+	output reg [15:0] out;
+
+	assign status[2] = out[15];
+	assign status[1] = (out[15] ^ Ain[15]) & ~(out[15] ^ Bin[15]);
+	assign status[0] = (out == 0);
+
+	always_comb case (op)
+		2'b00: out = Ain + Bin;
+		2'b01: out = Ain - Bin;
+		2'b10: out = Ain & Bin;
+		2'b11: out = ~Bin;
+	endcase
+endmodule: ALU