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78c261f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | `timescale 1ns / 1ps
module SIMDadd(
input [15:0] A,
input [15:0] B,
input H,
input O,
input Q,
input sub,
output [15:0] Cout
);
wire [15:0] B_real = sub?(~B):B;
wire [4:0] C0 = A[3:0] + B_real[3:0] + sub;
wire [4:0] C1 = A[7:4] + B_real[7:4] + (C0[4]&(O|H)) + (Q&sub);
wire [4:0] C2 = A[11:8] + B_real[11:8] + (C1[4]&H) + ((Q|O)&sub);
wire [4:0] C3 = A[15:12] + B_real[15:12] + (C2[4]&(O|H)) + (Q&sub);
assign Cout = {C3[3:0],C2[3:0],C1[3:0],C0[3:0]};
endmodule
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