merge

gowin/bttn/src/multiplier.v

@@ -1,76 +0,0 @@
-module multiplier (
-    input [3:0] A, B,
-    output [7:0] Y
-);
-
-wire [3:0] b0, a0, a1, a2;
-wire [4:0] S0, S1, S2;
-wire carry0, carry1, carry2;
-wire overflow0, overflow1, overflow2;
-
-// Partial product generation
-and (Y[0], A[0], B[0]); // LSB of the result
-
-// Generate partial products for B[0] and B[1]
-and ab00 (b0[0], A[1], B[0]);
-and ab01 (b0[1], A[2], B[0]);
-and ab02 (b0[2], A[3], B[0]);
-not ab03 (b0[3], 1'b1); // Initialize b0[3] to 0
-
-and aa00 (a0[0], A[0], B[1]);
-and aa01 (a0[1], A[1], B[1]);
-and aa02 (a0[2], A[2], B[1]);
-and aa03 (a0[3], A[3], B[1]);
-
-// First addition
-addition add0 (
-    .A(a0),
-    .B(b0),
-    .CarryIN(1'b0),
-    .Y(S0[3:0]),
-    .CarryOUT(S0[4]),
-    .overflow(overflow0)
-);
-
-// Generate partial products for B[2]
-and aa10 (a1[0], A[0], B[2]);
-and aa11 (a1[1], A[1], B[2]);
-and aa12 (a1[2], A[2], B[2]);
-and aa13 (a1[3], A[3], B[2]);
-
-// Second addition
-addition add1 (
-    .A(a1),
-    .B(S0[4:1]),
-    .CarryIN(1'b0),
-    .Y(S1[3:0]),
-    .CarryOUT(S1[4]),
-    .overflow(overflow1)
-);
-
-// Generate partial products for B[3]
-and aa20 (a2[0], A[0], B[3]);
-and aa21 (a2[1], A[1], B[3]);
-and aa22 (a2[2], A[2], B[3]);
-and aa23 (a2[3], A[3], B[3]);
-
-// Third addition
-addition add2 (
-    .A(a2),
-    .B(S1[4:1]),
-    .CarryIN(1'b0),
-    .Y(S2[3:0]),
-    .CarryOUT(S2[4]),
-    .overflow(overflow2)
-);
-
-// Combine results into the final output Y
-or o01 (Y[1], S0[0], 1'b0);
-or o02 (Y[2], S1[0], 1'b0);
-or o03 (Y[3], S2[0], 1'b0);
-or o04 (Y[4], S2[1], 1'b0);
-or o05 (Y[5], S2[2], 1'b0);
-or o06 (Y[6], S2[3], 1'b0);
-or o07 (Y[7], S2[4], 1'b0);
-
-endmodule