Iztok Jeras

crash on array declaration using sizes with initialization assignment pattern of wrong size

7

This code causes a crash. It seems (I did not check the waveforms yet) to work correctly if the array and assignment pattern are of the same size. ```SystemVerilog localparam...

support for swapping pins during routing

11

### Description While studying synthesis I noticed, for commutative operations (AND/OR reduction, cumulative sum, ...) it would be possible to reorder the input signals (any permutation, or any number of...

discussion: debugging ISA issues by comparing DUT and reference (sail/spike) execution logs

2

I developed a method for debugging ISA issues by comparing execution logs. The approach is kind of obvious, most of the effort was getting it compatible with RISCOF. I would...

casting to a vector of a given width not working properly

2

Using the git version of synlig. The sources and scripts to reproduce the problem are in the linked folder. https://github.com/jeras/synthesis-primitives/tree/main/bugreport/yosys/techmap_ha Seems synlig is not performing the casting of a single...

Using an FPGA to check if proposed sorting networks are compliant

2

Hi, I was thinking whether it would make sense to check the sorting network proposals generated by the evolutionary algorithm using an FPGA. I will try to explain what can...

Support `$sscanf` field widths

1

Latest Git version. SystemVerilog-2023 standard (I did not check if this is different in older versions). The next SystemVErilog code: ```SystemVerilog module sscanf_tb #( parameter int unsigned XLEN = 32...

unexpected "Unsized numbers/parameters not allowed in concatenations."

1

Tested on latest git. Link to example source code: https://github.com/jeras/miscelaneous/tree/main/verilator_localparam_in_struct_init I defined a packed structure type: ```SystemVerilog typedef struct packed { int unsigned ADDR_WIDTH; int unsigned DATA_WIDTH; int unsigned CODE_WIDTH;...

`$ungetc`lvalue cast should give error

3

Tested using Git head. While the standard is not exact here, the first argument for `$ungetc` is a character and should be 8-bit wide and should not expect a 32-bit...

Should AMO be seen as a write or a read operation

11

The end of _RISC-V ISA manual part II_ section _3.7.1. Physical Memory Protection CSRs_ states. I am looking at the latest draft. > Attempting to fetch an instruction from a...

memory leak in code loading array data from file (memory initialization)

3

Latest git build running on Ubuntu 24.04: ``` $ ghdl --version GHDL 6.0.0-dev (5.1.1.r207.g509045f3d) [Dunoon edition] Compiled with GNAT Version: 13.3.0 static elaboration, mcode JIT code generator ``` There is...