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 2014-07-06, 19:04 #1 tha     Dec 2002 787 Posts Broadwell new instructions Broadwell will again introduce new instructions. See the white paper. They mention use for some elliptic curve method. How might it affect prime95?
2014-07-06, 19:26   #2
kracker
ἀβουλία

"Mr. Meeseeks"
Jan 2012
California, USA

41708 Posts

Quote:
 Originally Posted by tha Broadwell will again introduce new instructions. See the white paper. They mention use for some elliptic curve method. How might it affect prime95?
Where does it say broadwell in the paper?

2014-07-06, 21:05   #3
tha

Dec 2002

787 Posts

Quote:
 Originally Posted by kracker Where does it say broadwell in the paper?
Nowhere, I just found some sites here and there that say that adox, adcx and mulx will be introduced in Broadwell.

2014-07-06, 21:36   #4
henryzz
Just call me Henry

"David"
Sep 2007
Cambridge (GMT/BST)

32·72·13 Posts

Quote:
 Originally Posted by tha Broadwell will again introduce new instructions. See the white paper. They mention use for some elliptic curve method. How might it affect prime95?
They actually mention elliptic curve cryptography.
Hopefully gmp should gain some speed from this. That should help gmp-ecm.

 2014-07-07, 03:35 #5 tului   Jan 2013 10001002 Posts I keep writing to Intel as a veteran/developer(sort of stretching the dev part). And they won't send me squat. I'd like a Phi
 2014-07-12, 16:52 #6 fivemack (loop (#_fork))     Feb 2006 Cambridge, England 2×29×109 Posts Phis are readily available items of commerce; there are a couple of ES ones available on ebay at less than $1000 (e.g. http://www.ebay.co.uk/itm/Intel-Xeon...item338f852e7a) My guess is that the 'Intel Xeon Phi Coprocessor Architecture and Tools' and 'Intel Xeon Phi Coprocessor High Performance Programming' books were handed out at some conference and not all the recipients wished to love them and cherish them forever, so they're about$50 from ebay. You'll need ICC, which is 30-day eval or \$700; I imagine Intel might be readier to hand out compiler licenses than they are to hand out hardware.
2014-07-18, 00:08   #7
ewmayer
2ω=0

Sep 2002
República de California

2·59·83 Posts

Quote:
 Originally Posted by tha Nowhere, I just found some sites here and there that say that adox, adcx and mulx will be introduced in Broadwell.
MULX is available already in Haswell, though Wikipedia appears unaware of the fact.
ADOX/ADCX, RDSEED and PREFETCHW are new in Broadwell. (The latter instruction is a belated mimicry of AMD's 3DNow! prefetch, not sure why Intel decided that [a] it was a good idea to add it and [b] to wait this long to do so.)

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