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| author | Marcelina Kościelnicka <mwk@0x04.net> | 2020-05-18 18:15:03 +0200 |
|---|---|---|
| committer | Marcelina Kościelnicka <mwk@0x04.net> | 2020-05-19 01:42:40 +0200 |
| commit | aee439360bba642dcbffe5b803aa9a994b11d183 (patch) | |
| tree | a5c15b4a6172ea3ff651f88174fff7d5269ad1c2 /techlibs/common/mul2dsp.v | |
| parent | 2d573a0ff680eb9f38358943fbf134f765ba1451 (diff) | |
| download | yosys-aee439360bba642dcbffe5b803aa9a994b11d183.tar.gz yosys-aee439360bba642dcbffe5b803aa9a994b11d183.tar.bz2 yosys-aee439360bba642dcbffe5b803aa9a994b11d183.zip | |
Add force_downto and force_upto wire attributes.
Fixes #2058.
Diffstat (limited to 'techlibs/common/mul2dsp.v')
| -rw-r--r-- | techlibs/common/mul2dsp.v | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/techlibs/common/mul2dsp.v b/techlibs/common/mul2dsp.v index 4cabb4453..bec47d01f 100644 --- a/techlibs/common/mul2dsp.v +++ b/techlibs/common/mul2dsp.v @@ -57,8 +57,11 @@ module _80_mul (A, B, Y); 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] Y;
parameter _TECHMAP_CELLTYPE_ = "";
@@ -119,13 +122,19 @@ module _80_mul (A, B, Y); localparam last_A_WIDTH = A_WIDTH-n*(`DSP_A_MAXWIDTH_PARTIAL-sign_headroom);
localparam last_Y_WIDTH = B_WIDTH+last_A_WIDTH;
if (A_SIGNED && B_SIGNED) begin
+ (* force_downto *)
wire signed [partial_Y_WIDTH-1:0] partial [n-1:0];
+ (* force_downto *)
wire signed [last_Y_WIDTH-1:0] last_partial;
+ (* force_downto *)
wire signed [Y_WIDTH-1:0] partial_sum [n:0];
end
else begin
+ (* force_downto *)
wire [partial_Y_WIDTH-1:0] partial [n-1:0];
+ (* force_downto *)
wire [last_Y_WIDTH-1:0] last_partial;
+ (* force_downto *)
wire [Y_WIDTH-1:0] partial_sum [n:0];
end
@@ -170,13 +179,19 @@ module _80_mul (A, B, Y); localparam last_B_WIDTH = B_WIDTH-n*(`DSP_B_MAXWIDTH_PARTIAL-sign_headroom);
localparam last_Y_WIDTH = A_WIDTH+last_B_WIDTH;
if (A_SIGNED && B_SIGNED) begin
+ (* force_downto *)
wire signed [partial_Y_WIDTH-1:0] partial [n-1:0];
+ (* force_downto *)
wire signed [last_Y_WIDTH-1:0] last_partial;
+ (* force_downto *)
wire signed [Y_WIDTH-1:0] partial_sum [n:0];
end
else begin
+ (* force_downto *)
wire [partial_Y_WIDTH-1:0] partial [n-1:0];
+ (* force_downto *)
wire [last_Y_WIDTH-1:0] last_partial;
+ (* force_downto *)
wire [Y_WIDTH-1:0] partial_sum [n:0];
end
@@ -249,8 +264,11 @@ module _90_soft_mul (A, B, Y); 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] Y;
// Indirection necessary since mapping
|