FMA/AVX2 fallback testfile

Question

FMA/AVX2 fallback testfile

dominikhlbg opened this issue 7 years ago · 5 comments

Hi,
I'm working on a FMA/AVX2 fallback for older CPUs. #8 (not final)
I want showing you my first result of encoding and decoding, processed by an i7 2600k. The cpu have only AVX but no AVX2 or FMA.

Encoded file: (please remove the ".txt" for encoding)
1.pik.txt

What do you thinking?

dominikhlbg commented 7 years ago

It works!

Answer 1 · 2017-07-27T14:25:56.000Z

Thanks for sending! Here's the AVX2 decoder output for your file:

Looks like the dc_predictor might still need work :)

Answer 2 · 2017-07-27T17:55:27.000Z

New image:

Answer 3 · 2017-07-27T19:08:39.000Z

Awesome! Out of curiosity, what did you change?

Answer 4 · 2017-07-27T19:50:06.000Z

The first image I worked only with a single 4x32 and not with dual 4x32 or single 8x32. The second I worked with 8x32 but forgotten broadcastd over all eight values. Only the first and the fifth was set.
My AVX solution can emulate with avxintrin-emu.h from Intel now.