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| author | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 18:50:02 -0700 |
|---|---|---|
| committer | Eddie Hung <eddie@fpgeh.com> | 2019-05-21 18:50:02 -0700 |
| commit | 9b1078b9bde70141514488acd01bb32b5422f9bd (patch) | |
| tree | 4b153d174d9c993222493bed362faf8f6012a2ca /techlibs/xilinx/cells_map.v | |
| parent | ee8435b820bbea4a4ceb2c46a81de9d03d4aa44c (diff) | |
| download | yosys-9b1078b9bde70141514488acd01bb32b5422f9bd.tar.gz yosys-9b1078b9bde70141514488acd01bb32b5422f9bd.tar.bz2 yosys-9b1078b9bde70141514488acd01bb32b5422f9bd.zip | |
Fix/workaround symptom unveiled by #1023
Diffstat (limited to 'techlibs/xilinx/cells_map.v')
| -rw-r--r-- | techlibs/xilinx/cells_map.v | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/techlibs/xilinx/cells_map.v b/techlibs/xilinx/cells_map.v index f566a8584..af6414667 100644 --- a/techlibs/xilinx/cells_map.v +++ b/techlibs/xilinx/cells_map.v @@ -220,7 +220,10 @@ module \$shiftx (A, B, Y); localparam a_widthN = A_WIDTH - a_width0; wire T0, T1; \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_width0), .B_WIDTH(2), .Y_WIDTH(Y_WIDTH)) fpga_shiftx (.A(A[a_width0-1:0]), .B(B[2-1:0]), .Y(T0)); - \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T1)); + if (a_widthN > 1) + \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T1)); + else + assign T1 = A[A_WIDTH-1]; MUXF7 fpga_mux (.I0(T0), .I1(T1), .S(B[B_WIDTH-1]), .O(Y)); end else if (B_WIDTH == 4) begin @@ -232,8 +235,12 @@ module \$shiftx (A, B, Y); for (i = 0; i < 4; i++) if (i < num_mux8) \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_width0), .B_WIDTH(2), .Y_WIDTH(Y_WIDTH)) fpga_shiftx (.A(A[i*a_width0+:a_width0]), .B(B[2-1:0]), .Y(T[i])); - else if (i == num_mux8 && a_widthN > 0) - \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:i*a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T[i])); + else if (i == num_mux8 && a_widthN > 0) begin + if (a_widthN > 1) + \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:i*a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T[i])); + else + assign T[i] = A[A_WIDTH-1]; + end else assign T[i] = 1'bx; MUXF7 fpga_mux_0 (.I0(T[0]), .I1(T[1]), .S(B[2]), .O(T0)); @@ -249,7 +256,10 @@ module \$shiftx (A, B, Y); if (i < num_mux16) \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_width0), .B_WIDTH(4), .Y_WIDTH(Y_WIDTH)) fpga_shiftx (.A(A[i*a_width0+:a_width0]), .B(B[4-1:0]), .Y(T[i])); else if (i == num_mux16 && a_widthN > 0) begin - \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:i*a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T[i])); + if (a_widthN > 1) + \$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(a_widthN), .B_WIDTH($clog2(a_widthN)), .Y_WIDTH(Y_WIDTH)) fpga_shiftx_last (.A(A[A_WIDTH-1:i*a_width0]), .B(B[$clog2(a_widthN)-1:0]), .Y(T[i])); + else + assign T[i] = A[A_WIDTH-1]; end else assign T[i] = 1'bx; |