mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-10-31 03:32:29 +00:00
Code Activity
15877 commits 122 branches 59 tags 72 MiB
Commit graph

28 commits

Author SHA1 Message Date
Emil J. Tywoniak
d071489ab1 hashlib: redo interface for flexibility 2024-12-18 14:49:25 +01:00
N. Engelhardt
378864d33b bound attributes: handle vhdl null ranges 2024-12-12 11:42:39 +01:00
Ethan Mahintorabi
bc66dfd9ea
verific: Fixes incorrect aldff inference in verific importer 
The following SV module at HEAD imported with verific,

```systemverilog
    module my_module(
      input logic [4:0] a,
      input logic clk,
      input logic enable,
      output logic [4:0] z
    );

    reg [4:0] pipeline_register;
    always @(posedge clk) begin
      pipeline_register <= enable ? a : pipeline_register;
    end
    assign z = pipeline_register;

    endmodule : my_module

```

results in the following output verilog

```systemverilog
/* Generated by 0.36 */

(* top =  1  *)
(* hdlname = "my_module" *)
(* src = "/tmp/temp_directory_zTwd0l/my_input.v:2.12-2.21" *)
module my_module(clk, enable, a, z);
  wire [4:0] _0_;
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:3.25-3.26" *)
  input [4:0] a;
  wire [4:0] a;
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:4.19-4.22" *)
  input clk;
  wire clk;
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:5.19-5.25" *)
  input enable;
  wire enable;
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:6.26-6.27" *)
  output [4:0] z;
  wire [4:0] z;
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:10.12-12.8" *)
  \$aldff  #(
    .ALOAD_POLARITY(32'd1),
    .CLK_POLARITY(32'd1),
    .WIDTH(32'd5)
  ) _1_ (
    .AD(5'hxx),
    .ALOAD(1'h0),
    .CLK(clk),
    .D(_0_),
    .Q(z)
  );
  (* src = "/tmp/temp_directory_zTwd0l/my_input.v:11.28-11.58" *)
  \$mux  #(
    .WIDTH(32'd5)
  ) _2_ (
    .A(z),
    .B(a),
    .S(enable),
    .Y(_0_)
  );
endmodule
```

Yosys is incorrectly infering aldffs due to an incorrect conversion
of logical 1 and 0 SigBits.

My PR unifies the conversion of Verific::Net objects into SigBits using
Yosys' internal representation of special signals like 0,1,x,z. After
my PR these signals are correctly converted into DFFs.

Signed-off-by: Ethan Mahintorabi <ethanmoon@google.com>
 2024-02-05 07:10:25 +00:00
Miodrag Milanovic
109b88c379 For case select values use Sa instead of Sx and Sz 2023-02-08 09:22:48 +01:00
Miodrag Milanovic
b0be19c126 Support importing verilog configurations using Verific 2022-11-25 13:02:11 +01:00
Jannis Harder
96f64f4788 verific: Fix conditions of SVAs with explicit clocks within procedures 
For SVAs that have an explicit clock and are contained in a procedure
which conditionally executes the assertion, verific expresses this using
a mux with one input connected to constant 1 and the other output
connected to an SVA_AT. The existing code only handled the case where
the first input is connected to 1. This patch also handles the other
case.
 2022-05-03 14:13:08 +02:00
Miodrag Milanovic
245ecb0529 Import verific netlist in consistent order 2022-03-25 13:44:16 +01:00
Claire Xenia Wolf
1602a03864 Add support for $aldff flip-flops to verific importer 
Signed-off-by: Claire Xenia Wolf <claire@clairexen.net>
 2021-10-08 16:21:25 +02:00
Claire Xenia Wolf
72787f52fc Fixing old e-mail addresses and deadnames 
s/((Claire|Xen|Xenia|Clifford)\s+)+(Wolf|Xen)\s+<(claire|clifford)@(symbioticeda.com|clifford.at|yosyshq.com)>/Claire Xenia Wolf <claire@yosyshq.com>/gi;
s/((Nina|Nak|N\.)\s+)+Engelhardt\s+<nak@(symbioticeda.com|yosyshq.com)>/N. Engelhardt <nak@yosyshq.com>/gi;
s/((David)\s+)+Shah\s+<(dave|david)@(symbioticeda.com|yosyshq.com|ds0.me)>/David Shah <dave@ds0.me>/gi;
s/((Miodrag)\s+)+Milanovic\s+<(miodrag|micko)@(symbioticeda.com|yosyshq.com)>/Miodrag Milanovic <micko@yosyshq.com>/gi;
s,https?://www.clifford.at/yosys/,http://yosyshq.net/yosys/,g;
 2021-06-08 00:39:36 +02:00
Eddie Hung
dd5f206d9e verific: recover wiretype/enum attr as part of import_attributes() 2020-04-27 08:43:54 -07:00
Clifford Wolf
f6ff311a1d Do not rename VHDL entities to "entity(impl)" when they are top modules 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-11-20 12:54:10 +01:00
Clifford Wolf
9260e97aa2 Automatically prune init attributes in verific front-end, fixes #1237 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-08-07 15:31:49 +02:00
Eddie Hung
3ea54ec400 Fix verific_parameters construction, use attribute to mark top netlists 2019-05-03 20:53:25 +02:00
Eddie Hung
a27b42e975 WIP -chparam support for hierarchy when verific 2019-05-03 20:53:25 +02:00
Clifford Wolf
3d671630e2 Improve src tagging (using names and attrs) of cells and wires in verific front-end 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-12-18 16:01:22 +01:00
Clifford Wolf
5d9d22f66d Add "verific -L <int>" option 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-09-04 20:06:10 +02:00
Clifford Wolf
5f2bc1ce76 Add automatic verific import in hierarchy command 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-06-20 23:45:01 +02:00
Clifford Wolf
4372cf690d Add (* gclk *) attribute support 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-06-01 13:25:42 +02:00
Clifford Wolf
4d645f0fce Fix verific handling of anyconst/anyseq attributes 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-05-24 17:07:06 +02:00
Clifford Wolf
ab8db2c168 Add "verific -autocover" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-04-06 14:10:57 +02:00
Clifford Wolf
315d5e32bf Fix handling of unclocked immediate assertions in Verific front-end 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-26 13:04:10 +02:00
Clifford Wolf
a4bbfd2d15 Fix Verific handling of "assert property (..);" in always block 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-07 20:06:02 +01:00
Clifford Wolf
92d5f4db6f Add "verific -import -V" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-07 19:40:34 +01:00
Clifford Wolf
480e8e676a Add proper SVA seq.triggered support 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-04 19:29:26 +01:00
Clifford Wolf
261cf706f4 Add VerificClocking class and refactor Verific DFF handling 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-04 13:48:53 +01:00
Clifford Wolf
9a2a8cd97b Fixes and improvements in Verific SVA importer 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-03-01 11:40:43 +01:00
Clifford Wolf
15902d495f Continue refactoring of Verific SVA importer code 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-02-28 11:45:04 +01:00
Clifford Wolf
5fa2aa2741 Move Verific SVA importer to extra C++ source file 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-02-18 13:52:49 +01:00