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Added $bu0 cell (for easy correct $eq/$ne mapping)

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This commit is contained in:
Clifford Wolf 2013-12-28 11:54:40 +01:00
parent 7f71787599
commit c69c416d28
6 changed files with 35 additions and 5 deletions
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14
techlibs/common/stdcells.v
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@ -44,6 +44,12 @@ endmodule
// --------------------------------------------------------
(* techmap_simplemap *)
module \$bu0 ;
endmodule
// --------------------------------------------------------
module \$neg (A, Y);
parameter A_SIGNED = 0;
@ -538,8 +544,8 @@ output [Y_WIDTH-1:0] Y;
wire carry, carry_sign;
wire [WIDTH-1:0] A_buf, B_buf;
\$pos #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(WIDTH)) A_conv (.A(A), .Y(A_buf));
\$pos #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(WIDTH)) B_conv (.A(B), .Y(B_buf));
\$bu0 #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(WIDTH)) A_conv (.A(A), .Y(A_buf));
\$bu0 #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(WIDTH)) B_conv (.A(B), .Y(B_buf));
assign Y = ~|(A_buf ^ B_buf);
@ -563,8 +569,8 @@ output [Y_WIDTH-1:0] Y;
wire carry, carry_sign;
wire [WIDTH-1:0] A_buf, B_buf;
\$pos #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(WIDTH)) A_conv (.A(A), .Y(A_buf));
\$pos #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(WIDTH)) B_conv (.A(B), .Y(B_buf));
\$bu0 #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(WIDTH)) A_conv (.A(A), .Y(A_buf));
\$bu0 #(.A_SIGNED(A_SIGNED && B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(WIDTH)) B_conv (.A(B), .Y(B_buf));
assign Y = |(A_buf ^ B_buf);