Many thanks man!
You can see yourself how difficult is for me to test snippets that need CPUs that I cannot afford to buy, the Internet is worse than real life - the disbelief is the norm, call me naive even stupid, but asking for help in some tests and receiving "are you out of your mind to ask such things" shows how rampant is the fear of someone hurting their data, not how "not normal" is to ask for help.
You bolded the needed lines, nice, your 3rd gen Intel shows that intensive YMM unaligned fetches/stores with OVERLAPPING work properly
in contrast to my mobile 2nd gen. Since my money is scarce and I couldn't ask my friends for more favors, some don't have 3rd+ CPUs, some have helped me several times and I am reluctant to be insolent to bother them, I was feeling kinda down, now I see that the 256bit unaligned reads/writes with overlaps are executed in a buggy way on i5-2540M, this laptop was bought by my brother from Newegg and is equipped with 16GB RAM - he gave it to me to prepare my heavy-decompression-textual showdown and I was happy until this bug in the AVX occurred, as you can see QWORD and XMM counterparts work properly, anyway, I felt cheated because I couldn't finish/present my tests with AVX code versus the rest superfast performers, I had to go with 4xQWORD operations instead 1xYMM - which was the idea!
The crippled showdown/benchmark is made with 4xQWORDs and posted on my blog:
The 88 benchmark | Sanmayce's dumps
In my eyes, Toshiba, or Intel for that matter, ought to replace freely my buggy laptop with one with similar characteristics but with 3rd, or better, gen CPU. They made a product that fails to work! Had I had more money I would buy a new one making no noise but being moneyless is not fun.
Again, thanks a lot.
My guess is that this bug is fixed for good, that is, 4th, 5th and 6th generations are are okay as well.
I will return to Intel, in there, Tim Prince - a veteran in compiler designs and an expert on Intel's mojos have tried to help me, but for some reason it didn't happen, anyway, to finish my post I will cite one wisdom, hanged on the wall in a frame, of Napoleon which I was looking when was in the army,
"The coherence is a top virtue!"
I like to think that I am chasing the goals steadily without "quitting" them.