Viewing profile — fayalalebrun

Apparently Voodoo cards defaulted to 1.3 gamma instead of the standard 2.2. I wonder why that is, since it theory using a non-standard gamma would just reduce your color range with…

This fits and runs in a DE-10 Nano without too much difficulty, uses around 70% of the fabric. I've been working on timing closure and just got it to 50 MHz. Note that I also imple…

You do have a nice point here. Then the compute unit can simply stall the commands coming out of the register bank. Without this I need to stall the write FIFO, which feels less el…

Thank you! These things do pack in a ridiculous amount of functionality for what they do. Probably why they look so good but also why it took 30 years for a hardware re-implementat…

Maybe I'm misunderstanding, but that functionality is implemented in another component. The register bank only records the category of each register and implements the memory-mappe…

SpinalHDL did not fork from Chisel. You might be able to say that it was inspired by Chisel, but it does not share a commit history. See this comment by the author: https://www.red…

My favorite dithering algorithm for motion video is Yliluoma dithering: https://bisqwit.iki.fi/story/howto/dither/jy/ It is especially useful for grayscale content, as finding the …

Do you have any other examples where systolic arrays are suitable other than matrix multiplication? As far as I am aware, other problems require different systolic architectures. S…

As a result of a flaw in the protocol itself or in its implementation?

This is a common misconception, but is not the case. For example, look at the Voodoo 1, 2, and 3, which also used fixed point numbers internally but did not suffer from this proble…

A few years ago a friend and I made something similar to universe sandbox, though only with the gravitational simulation part: https://github.com/fayalalebrun/Astraria Surprisingly…

Even though the newest nvidia drivers have started to support GBM, the Wayland compatibility story is still not great. In my experience on Wayland, several OpenGL programs refuse t…

I probably don't have nearly as much experience as you do, but I have used VHDL, Verilog, and modern HDLs like Chisel and SpinalHDL. I think the main advantage of a modern HDL is t…

Chisel does emit FIRRTL. Which can be made into a bitstream directly by Yosys.

Perhaps already possible via MoltenVK -> Vulkan -> Zink?

I am surprised no one has yet tried to make a portable shell for the DE-10 Nano (Mister-FPGA's target platform). With a power usage of 10 watts, I think it should be quite feasible…

What about the actual FPGA specs? Is it more power efficient per LUT? A newer generation or the same generation but a smaller chip?

I am curious, in what ways is WebGPU better than Vulkan or Metal? From my point of view, WebGPU going back to an interpreted shading language like OpenGL makes it conceptually clos…

With FPGA, unlike with GPUs, you can achieve significant speedup of algorithms where parallelization is very difficult. This is thanks to a technique called pipelining, where you c…