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diff --git a/techlibs/intel/cycloneive/arith_map.v b/techlibs/intel/cycloneive/arith_map.v
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+++ b/techlibs/intel/cycloneive/arith_map.v
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+/*
+ *  yosys -- Yosys Open SYnthesis Suite
+ *
+ *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+module _80_cycloneive_alu (A, B, CI, BI, X, Y, CO);
+   parameter A_SIGNED = 0;
+   parameter B_SIGNED = 0;
+   parameter A_WIDTH = 1;
+   parameter B_WIDTH = 1;
+   parameter Y_WIDTH = 1;
+
+   input [A_WIDTH-1:0] A;
+   input [B_WIDTH-1:0] B;
+   output [Y_WIDTH-1:0] X, Y;
+
+   input                CI, BI;
+   output [Y_WIDTH:0]   CO;
+
+   wire                 _TECHMAP_FAIL_ = Y_WIDTH < 5;
+
+   wire [Y_WIDTH-1:0]   A_buf, B_buf;
+   \$pos #(.A_SIGNED(A_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(Y_WIDTH)) A_conv (.A(A), .Y(A_buf));
+   \$pos #(.A_SIGNED(B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(Y_WIDTH)) B_conv (.A(B), .Y(B_buf));
+
+   wire [Y_WIDTH-1:0]   AA = A_buf;
+   wire [Y_WIDTH-1:0]   BB = BI ? ~B_buf : B_buf;
+   wire [Y_WIDTH:0]     C = {CO, CI};
+   
+   cycloneive_lcell_comb #(.lut_mask(16'b0110_0110_1000_1000), .sum_lutc_input("cin")) carry_start  (.cout(CO[0]), .dataa(BB[0]), .datab(1'b1), .datac(1'b1), .datad(1'b1));
+   genvar               i;
+   generate for (i = 1; i < Y_WIDTH; i = i + 1) begin:slice
+      cycloneive_lcell_comb #(.lut_mask(16'b0101_1010_0101_0000), .sum_lutc_input("cin")) arith_cell (.combout(Y[i]), .cout(CO[i]), .dataa(BB[i]), .datab(1'b1), .datac(1'b1), .datad(1'b1), .cin(C[i]));
+   end endgenerate
+
+   assign X = AA ^ BB;
+   
+endmodule