diff options
Diffstat (limited to 'techlibs/common/mul2dsp.v')
| -rw-r--r-- | techlibs/common/mul2dsp.v | 33 |
1 files changed, 12 insertions, 21 deletions
diff --git a/techlibs/common/mul2dsp.v b/techlibs/common/mul2dsp.v index 258ddf021..d19599620 100644 --- a/techlibs/common/mul2dsp.v +++ b/techlibs/common/mul2dsp.v @@ -34,31 +34,22 @@ module \$mul (A, B, Y); output [Y_WIDTH-1:0] Y;
generate
- if (`DSP_A_SIGNEDONLY && !A_SIGNED) begin
- wire dummy;
+ localparam add_sign_A = `DSP_A_SIGNEDONLY && !A_SIGNED;
+ localparam add_sign_B = `DSP_B_SIGNEDONLY && !B_SIGNED;
+ if (add_sign_A || add_sign_B) begin
+ if (add_sign_A && add_sign_B)
+ wire [1:0] dummy;
+ else
+ wire dummy;
\$mul #(
.A_SIGNED(1),
- .B_SIGNED(B_SIGNED),
- .A_WIDTH(A_WIDTH+1),
- .B_WIDTH(B_WIDTH),
- .Y_WIDTH(Y_WIDTH+1)
- ) _TECHMAP_REPLACE_ (
- .A({1'b0, A}),
- .B(B),
- .Y({dummy, Y})
- );
- end
- else if (`DSP_B_SIGNEDONLY && !B_SIGNED) begin
- wire dummy;
- \$mul #(
- .A_SIGNED(A_SIGNED),
.B_SIGNED(1),
- .A_WIDTH(A_WIDTH),
- .B_WIDTH(B_WIDTH+1),
- .Y_WIDTH(Y_WIDTH+1)
+ .A_WIDTH(A_WIDTH + (add_sign_A ? 1 : 0)),
+ .B_WIDTH(B_WIDTH + (add_sign_B ? 1 : 0)),
+ .Y_WIDTH(Y_WIDTH + (add_sign_A ? 1 : 0) + (add_sign_B ? 1 : 0))
) _TECHMAP_REPLACE_ (
- .A(A),
- .B({1'b0, B}),
+ .A(add_sign_A ? {1'b0, A} : A),
+ .B(add_sign_B ? {1'b0, B} : B),
.Y({dummy, Y})
);
end
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