sim fails with generate-interface=INFER

Question

sim fails with generate-interface=INFER

SerenaC94 opened this issue 2 years ago · comments

I have more than one kernel failing simulation at the moment, but in the archive I isolated a small-ish example. The files to reproduce the error are attached in durbin.zip, the command I used was

bambu durbin.ll --compiler=I386_CLANG11 --simulate --generate-tb=test.xml --top-fname=kernel_durbin --generate-interface=INFER --interface-xml-filename=durbin.c.interface.xml

I tried with both version b18944455e3ab3fdc72f81fcde2b2fb3dfa62168-fix/polybench_support and version 3472c99482e27bcd23273ac3817dd5e49caaa71e-dev/panda of bambu.
In both cases by removing --generate-interface=INFER --interface-xml-filename=durbin.c.interface.xml the simulation works.

Serena Curzel · Answer 1 · Sat Nov 05 2022 00:39:00 GMT+0800 (China Standard Time)

This still happens with dev/panda as of today. More LLVM IR kernels fail with and without INFER, so it will have to be further investigated.

Serena Curzel · Answer 2 · Mon Mar 27 2023 22:32:12 GMT+0800 (China Standard Time)

The durbin kernel still fails simulation with the array interface as of today, Bambu version 6410712-dev/panda

Michele Fiorito · Answer 3 · Tue Apr 04 2023 00:59:04 GMT+0800 (China Standard Time)

Synthesis of the provided code should not be allowed at all since unaligned access to parameter P1 is present in the input code. This is not allowed when using an array interface and leads to the generation of incorrect HDL design.
The tool has been updated to report the issue to the user and abort the synthesis if such a behavior is detected.