Message boards :
Number crunching :
What (yet unsupported) instructions do we need?
Message board moderation
Author | Message |
---|---|
HTH Send message Joined: 8 Jul 00 Posts: 691 Credit: 909,237 RAC: 0 |
I asked Intel if they are going to support SSE5, SSE4a, MMX+, 3DNow! and 3DNow!+ instructions sets in Sandy Bridge. This is what I got: "...If there is a specific instruction from these extensions that you think we are missing that is useful, I would be happy to check if we have support for that functionality already..." Can you find any instructions (from the above sets) that are yet unsupported in Intel CPUs but could be useful in SETI@home/distributed computing? Manned mission to Mars in 2019 Petition <-- Sign this, please. |
Dr. C.E.T.I. Send message Joined: 29 Feb 00 Posts: 16019 Credit: 794,685 RAC: 0 |
I asked Intel if they are going to support SSE5, SSE4a, MMX+, 3DNow! and 3DNow!+ instructions sets in Sandy Bridge. This is what I got: "...If there is a specific instruction from these extensions that you think we are missing that is useful, I would be happy to check if we have support for that functionality already..." Henri . . . might want to speak with Dr who? (Francois) regarding (seriously) BOINC Wiki . . . Science Status Page . . . |
Seaking57 Send message Joined: 14 Nov 01 Posts: 12 Credit: 76,220,481 RAC: 4 |
Just out of curiosity why would Intel support AMD instruction sets and have to pay them royalties for there usage? Intel has already out performed AMD with SSE3 and SSSE3 and correct me if I’m wrong but SSE4a From AMD looks like it has some instructions for the specific true quad core design of the Barcelona and Phenom. I think that would be useless on an Intel chip. As for SSE5 AMD put it on there Barcelona core but I don’t think anyone supports it in there compilers yet. Maybe someone with a better understanding of the instruction sets will jump in and say something. |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
Just out of curiosity why would Intel support AMD instruction sets and have to pay them royalties for there usage? I don't know the specifics of the contract, but Intel and AMD have a cross-license deal on a lot of their technology. AMD frequently borrow's from Intel (SSEx) and Intel borrowed from AMD (x64). Royalties may be involved, I don't know. But if it's good for the customer, then it might be worth licensing (plus, how are you going to explain that your new Core 3 processor supports SSE, SSE2, SSE3, SSSE3, SSE4.1 and SSE6 but not SSE5?). |
HTH Send message Joined: 8 Jul 00 Posts: 691 Credit: 909,237 RAC: 0 |
Henri . . . might want to speak with Dr who? (Francois) regarding (seriously) Yes, I will try to contact him. Henri. Manned mission to Mars in 2019 Petition <-- Sign this, please. |
AlphaLaser Send message Joined: 6 Jul 03 Posts: 262 Credit: 4,430,487 RAC: 0 |
I think we have a great deal to look forward to in Intel's AVX extensions that are planned for Sandy Bridge. It will double the register size to 256 bits meaning possibly double the throughput in a single instruction. I'm confident that there's a great deal of crunching power to be gained from that fact alone. Here's a paragraph about AVX from an Intel press briefing:
|
1mp0£173 Send message Joined: 3 Apr 99 Posts: 8423 Credit: 356,897 RAC: 0 |
I asked Intel if they are going to support SSE5, SSE4a, MMX+, 3DNow! and 3DNow!+ instructions sets in Sandy Bridge. This is what I got: "...If there is a specific instruction from these extensions that you think we are missing that is useful, I would be happy to check if we have support for that functionality already..." The answer of course is: none of them. Some of these instructions might make things faster, but only after support is added to the appropriate compiler and/or library. ... but we're crunching now, so they aren't strictly needed. |
HTH Send message Joined: 8 Jul 00 Posts: 691 Credit: 909,237 RAC: 0 |
I haven't got an answer from Francois yet. Does anyone know where he is? Henri. Manned mission to Mars in 2019 Petition <-- Sign this, please. |
SATAN Send message Joined: 27 Aug 06 Posts: 835 Credit: 2,129,006 RAC: 0 |
He more than likely busy with IDF and things. |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.