diff options
Diffstat (limited to 'techlibs/intel/cycloneiv/cells_arith.v')
| -rw-r--r-- | techlibs/intel/cycloneiv/cells_arith.v | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/techlibs/intel/cycloneiv/cells_arith.v b/techlibs/intel/cycloneiv/cells_arith.v index 010a4b5da..f7bc3cd65 100644 --- a/techlibs/intel/cycloneiv/cells_arith.v +++ b/techlibs/intel/cycloneiv/cells_arith.v @@ -70,8 +70,11 @@ module _80_cycloneiv_alu (A, B, CI, BI, X, Y, CO); parameter B_WIDTH = 1; parameter Y_WIDTH = 1; + (* force_downto *) input [A_WIDTH-1:0] A; + (* force_downto *) input [B_WIDTH-1:0] B; + (* force_downto *) output [Y_WIDTH-1:0] X, Y; input CI, BI; @@ -79,11 +82,14 @@ module _80_cycloneiv_alu (A, B, CI, BI, X, Y, CO); wire _TECHMAP_FAIL_ = Y_WIDTH < 6; + (* force_downto *) 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)); + (* force_downto *) wire [Y_WIDTH-1:0] AA = A_buf; + (* force_downto *) wire [Y_WIDTH-1:0] BB = BI ? ~B_buf : B_buf; wire [Y_WIDTH:0] C = {CO, CI}; |