By: IntelUser2000 (Intel_user2000.delete@this.yahoo.ca), May 18, 2007 8:58 pm
Room: Moderated Discussions
Michael S (already5chosen@yahoo.com) on 5/17/07 wrote:
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>IntelUser2000 (Intel_user2000@yahoo.ca) on 5/16/07 wrote:
>---------------------------
>>
>>I always thought Conroe had fully pipelined FPU from looking at your article, but
>>its not true.
>
>80bit x87 multiplication (FMUL) on Merom* is indeed not fully pipelined. However
>64-bit SSE2 (MULSD/MULPD) multiplication is fully pipelined. So MULSD has two times
>higher throughput over Banias/Dothan/Yonah while MULPD has four times higher throughput.
>
>>It still has the same FPU latency for FPMUL as its P6 derivatives.
>
>Don't you mean "the same FPU throughput"?
>
>I don't like when people use the name "Conroe" to describe Intel's new microarchitecture.
>Conroe is just a name of desktop variant of Merom core.
>The use of the name "Barcelona" instead of Hound or Greyhound is only marginally better.
Here's the link: http://www.realworldtech.com/forums/index.cfm?action=detail&id=68284&threadid=68284&roomid=2
"-- NGMA x87 capabilities are very similar to the P6 descendants: 3l/1tp FADD, 5l/2tp FMUL."
I guess it isn't a problem anymore though, because most of the programs use SSE, right?
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>IntelUser2000 (Intel_user2000@yahoo.ca) on 5/16/07 wrote:
>---------------------------
>>
>>I always thought Conroe had fully pipelined FPU from looking at your article, but
>>its not true.
>
>80bit x87 multiplication (FMUL) on Merom* is indeed not fully pipelined. However
>64-bit SSE2 (MULSD/MULPD) multiplication is fully pipelined. So MULSD has two times
>higher throughput over Banias/Dothan/Yonah while MULPD has four times higher throughput.
>
>>It still has the same FPU latency for FPMUL as its P6 derivatives.
>
>Don't you mean "the same FPU throughput"?
>
>I don't like when people use the name "Conroe" to describe Intel's new microarchitecture.
>Conroe is just a name of desktop variant of Merom core.
>The use of the name "Barcelona" instead of Hound or Greyhound is only marginally better.
Here's the link: http://www.realworldtech.com/forums/index.cfm?action=detail&id=68284&threadid=68284&roomid=2
"-- NGMA x87 capabilities are very similar to the P6 descendants: 3l/1tp FADD, 5l/2tp FMUL."
I guess it isn't a problem anymore though, because most of the programs use SSE, right?
Topic | Posted By | Date |
---|---|---|
Barcelona Article Online | David Kanter | 2007/05/16 03:20 AM |
Barcelona Article Online | PiedPiper | 2007/05/16 05:12 AM |
Yes, I left out a sentence there. Fixed (NT) | David Kanter | 2007/05/16 12:07 PM |
Barcelona Article Online | anonymous | 2007/05/16 06:01 AM |
Barcelona Article Online | Anonymous | 2007/05/16 06:28 PM |
Barcelona Article Online | anonymous | 2007/05/16 07:52 PM |
Barcelona Article Online | Anonymous1 | 2007/05/16 07:08 AM |
Barcelona Article Online | Dean M | 2007/05/16 11:09 AM |
Barcelona Article Online | David Kanter | 2007/05/16 12:38 PM |
Barcelona Article Online | Dean M | 2007/05/16 02:10 PM |
Barcelona Article Online | IntelUser2000 | 2007/05/16 02:59 PM |
Barcelona Article Online | Linus Torvalds | 2007/05/16 03:24 PM |
Barcelona Article Online | David Kanter | 2007/05/16 04:57 PM |
Barcelona Article Online | Michael S | 2007/05/17 05:07 AM |
Barcelona Article Online | IntelUser2000 | 2007/05/18 08:58 PM |
8 socket servers | Doug Siebert | 2007/05/16 04:58 PM |
8 socket servers | Michael S | 2007/05/17 05:20 AM |
8 socket servers | Joe Chang | 2007/05/17 07:38 AM |
8 socket servers | Alex Jones | 2007/05/17 09:35 AM |
8 socket servers | Jose | 2007/05/23 08:23 AM |
8 socket servers | Michael S | 2007/05/23 11:37 AM |
8 socket servers | anonymous | 2007/05/26 03:49 PM |
8 socket servers | Joe Chang | 2007/05/27 01:46 PM |
8 socket servers | Doug Siebert | 2007/05/23 09:56 PM |
8 socket servers | Joe Chang | 2007/05/24 04:33 AM |
8 socket servers | Anonymous | 2007/05/24 11:18 AM |
8 socket servers | Doug Siebert | 2007/05/24 10:47 PM |
8 socket servers | Linus Torvalds | 2007/05/25 10:35 AM |
8 socket servers | Nick | 2007/05/25 02:29 AM |
Performance estimation seems odd | Hotar | 2007/05/17 01:54 AM |
Performance estimation seems odd | David Kanter | 2007/05/17 08:38 AM |
microops vs macroops on page 4 | Peter Lund | 2007/05/17 12:04 PM |
microops vs macroops on page 4 | David Kanter | 2007/05/21 04:51 PM |
microops vs macroops on page 4 | EduardoS | 2007/05/21 05:42 PM |
microops vs macroops on page 4 | dess | 2007/05/21 07:00 PM |
Barcelona Article Online | Peter Lund | 2007/05/17 12:25 PM |
macro-op vs. micro-op | dess | 2007/05/21 07:24 AM |
macro-op vs. micro-op | David Kanter | 2007/05/21 04:38 PM |
macro-op vs. micro-op | dess | 2007/05/21 06:15 PM |
macro-op vs. micro-op | David Kanter | 2007/05/22 12:11 AM |
macro-op vs. micro-op | dess | 2007/05/22 03:56 AM |
macro-op vs. micro-op | Gipsel | 2007/05/22 05:05 AM |
macro-op vs. micro-op | dess | 2007/05/22 05:52 AM |
macro-op vs. micro-op | anonymous | 2007/05/22 06:14 AM |
macro-op vs. micro-op | dess | 2007/05/22 06:44 AM |
macro-op vs. micro-op | EduardoS | 2007/05/22 02:19 PM |
macro-op vs. micro-op | dess | 2007/05/24 08:52 AM |
Stop comparing apples to oranges | EduardoS | 2007/05/22 02:30 PM |
Stop comparing apples to oranges | dess | 2007/05/22 04:09 PM |
Stop comparing apples to oranges | dess | 2007/05/22 04:30 PM |
Stop comparing apples to oranges | EduardoS | 2007/05/22 04:31 PM |
Stop comparing... apples to oranges? | dess | 2007/05/24 09:30 AM |
Stop comparing apples to oranges | anonymous | 2007/05/22 08:12 PM |
Stop comparing apples to oranges | EduardoS | 2007/05/23 02:50 PM |
macro-op vs. micro-op | anonymous | 2007/05/22 06:08 AM |
macro-op vs. micro-op | dess | 2007/05/22 06:40 AM |
macro-op vs. micro-op | anonymous | 2007/05/22 06:48 AM |
macro-op vs. micro-op | dess | 2007/05/21 08:30 PM |
macro-op vs. micro-op | anonymous | 2007/05/22 06:44 AM |
macro-op vs. micro-op | dess | 2007/05/24 09:38 AM |
macro-op vs. micro-op | Michael S | 2007/05/22 05:26 AM |