RWT Forums

By: EduardoS (no.delete@this.spam.com), April 27, 2012 1:27 pm

David Kanter (dkanter@realworldtech.com) on 4/27/12 wrote:
---------------------------
>Absolutely. In fact, it's more useful in the context of the K8 than Sandy Bridge.
>The K8 cannot re-order so you REALLY want to calculate every address as soon as possible.

It's not just to calculate address as soon as possible, it also help in packing x86 instructions inside the chip and reduce the size of the forwarding network, if there was two decoupled AGUs there would be 5 sources from the forwarding network per ALU, coupled there are only four*.

* Does anyone knows if being a power of 2 helps?

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Topic	Posted By	Date
Phoronix tests GCC compiler flags and Bulldozer.	I.S.T.	04/19/12 03:05 AM
Single page view?	David Kanter	04/19/12 08:59 AM
Single page view?	wainwright	04/19/12 09:22 AM
Single page view?	slothrop	04/19/12 09:23 AM
Single page view?	David Kanter	04/19/12 09:31 AM
Single page view?	EduardoS	04/19/12 03:12 PM
Is there a single page view option for RWT articles?	anon	04/19/12 09:27 AM
Single page view?	Del	04/19/12 09:36 AM
Single page view?	slacker	04/19/12 03:56 PM
Single page view?	Del	04/22/12 06:09 AM
Single page view?	David Kanter	04/22/12 09:38 AM
Single page view?	Del	04/23/12 01:22 AM
Single page view?	Michael S	04/19/12 01:30 PM
Single page view?	Ungo	04/19/12 02:25 PM
Single page view?	Foo_	04/20/12 12:17 AM
Single page view?	James	04/20/12 04:01 AM
There are ads on the web?	JJB	04/20/12 04:32 AM
What a bunch of freeloaders (NT)	slacker	04/20/12 01:44 PM
So are you, probably	iz	04/21/12 04:41 AM
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So are you, probably	slacker	04/21/12 01:09 PM
So are you, probably	David Kanter	04/22/12 09:41 AM
So are you, probably	iz	04/22/12 03:57 PM
So are you, probably	Doug Siebert	04/22/12 12:37 PM
Aha!	David Kanter	04/22/12 03:45 PM
Aha!	bakaneko	04/22/12 08:49 PM
So are you, probably	iz	04/22/12 03:48 PM
That's not how the business works...	David Kanter	04/22/12 05:31 PM
That's not how the business works...	iz	04/23/12 01:49 AM
So are you, probably	slacker	04/22/12 11:31 PM
back to phoronix	Michael S	04/23/12 02:07 AM
So are you, probably	iz	04/23/12 03:29 AM
Membership at RWT	David Kanter	04/23/12 11:24 AM
So are you, probably	Jukka Larja	04/27/12 08:59 AM
So, what do people think of these numbers>	I.S.T.	04/19/12 07:34 PM
So, what do people think of these numbers>	Linus Torvalds	04/20/12 08:34 AM
So, what do people think of these numbers>	Kira	04/20/12 09:18 AM
So, what do people think of these numbers>	Linus Torvalds	04/20/12 10:05 AM
So, what do people think of these numbers>	Doug Siebert	04/20/12 09:00 PM
So, what do people think of these numbers>	Megol	04/21/12 09:05 AM
So, what do people think of these numbers>	Linus Torvalds	04/21/12 01:11 PM
Most problems are fixed...	Megol	04/24/12 07:00 AM
So, what do people think of these numbers>	bakaneko	04/20/12 11:16 AM
So, what do people think of these numbers>	bakaneko	04/20/12 11:37 AM
So, what do people think of these numbers>	Linus Torvalds	04/20/12 01:24 PM
So, what do people think of these numbers>	Joel	04/20/12 02:59 PM
So, what do people think of these numbers>	Kira	04/20/12 03:32 PM
So, what do people think of these numbers>	EduardoS	04/20/12 04:00 PM
Bulldozer's Oddities.	Joel	04/20/12 04:54 PM
In defense of Bulldozer's Oddities	David Kanter	04/20/12 05:32 PM
In defense of Bulldozer's Oddities	Exophase	04/20/12 07:11 PM
In defense of Bulldozer's Oddities	EduardoS	04/20/12 07:46 PM
In defense of Bulldozer's Oddities	Exophase	04/20/12 08:18 PM
In defense of Bulldozer's Oddities	anonymous	04/20/12 11:26 PM
In defense of Bulldozer's Oddities	JJB	04/20/12 11:34 PM
In defense of Bulldozer's Oddities	imaxx	04/21/12 07:21 AM
In defense of Bulldozer's Oddities	Michael S	04/21/12 10:42 AM
Bulldozer's integer execution units	David Kanter	04/25/12 04:29 PM
Bulldozer's integer execution units	Exophase	04/26/12 12:17 PM
Bulldozer's integer execution units	anonymous	04/26/12 03:15 PM
Bulldozer's integer execution units	EduardoS	04/26/12 03:40 PM
Bulldozer's integer execution units	Foo_	04/27/12 08:21 AM
Bulldozer's integer execution units	Megol	04/27/12 01:38 PM
Bulldozer's integer execution units	EduardoS	04/26/12 03:47 PM
Bulldozer's integer execution units	Exophase	04/26/12 05:02 PM
Bulldozer's integer execution units	EduardoS	04/26/12 06:03 PM
Bulldozer's integer execution units	Exophase	04/26/12 06:24 PM
Bulldozer's integer execution units	EduardoS	04/26/12 07:18 PM
Bulldozer's cache memory performance	Heikki Kultala	04/28/12 01:18 AM
Bulldozer's cache memory performance	EduardoS	04/28/12 10:06 AM
Bulldozer's integer execution units	David Kanter	04/26/12 04:03 PM
Bulldozer's integer execution units	Exophase	04/26/12 04:59 PM
Bulldozer's integer execution units	David Kanter	04/26/12 10:53 PM
Bulldozer's integer execution units	Exophase	04/27/12 08:42 AM
Bulldozer's integer execution units	David Kanter	04/27/12 11:06 AM
Bulldozer's integer execution units	EduardoS	04/27/12 01:27 PM
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Bulldozer's integer execution units	Michael S	04/27/12 04:37 AM
Bulldozer's integer execution units	Exophase	04/27/12 08:33 AM
Bulldozer's integer execution units	anonymous	04/27/12 09:03 AM
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Renaming Flags	none	04/27/12 04:03 AM
Renaming Flags	Megol	04/27/12 12:42 PM
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In defense of Bulldozer's Oddities	EduardoS	04/21/12 12:53 PM
In defense of Bulldozer's Oddities	Gionatan Danti	04/21/12 12:42 PM
In defense of Bulldozer's Oddities	hcl64	04/27/12 05:07 PM
In defense of Bulldozer's Oddities	David Kanter	04/28/12 06:29 AM
In defense of Bulldozer's Oddities	hcl64	04/28/12 02:44 PM
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Bulldozer's Oddities.	EduardoS	04/20/12 06:05 PM
Bulldozer's Oddities.	anon	04/20/12 08:32 PM
Bulldozer's Oddities.	EduardoS	04/21/12 12:37 PM
Bulldozer's Oddities.	anon	04/21/12 10:16 PM
Bulldozer's Oddities.	EduardoS	04/21/12 10:43 PM
Bulldozer's Oddities.	anon	04/22/12 02:09 AM
Bulldozer's Oddities.	EduardoS	04/22/12 01:57 PM
Bulldozer's Oddities.	anon	04/22/12 04:17 PM
Bulldozer's Oddities.	EduardoS	04/22/12 05:05 PM
Bulldozer's Oddities.	anon	04/22/12 05:42 PM
Bulldozer's Oddities.	anon	04/22/12 06:01 PM
Bulldozer's Oddities.	EduardoS	04/22/12 10:28 PM
Bulldozer's Oddities.	anon	04/22/12 11:05 PM
Bulldozer's isn't bad.	a reader	04/21/12 10:01 AM
Bulldozer's isn't bad.	Kira	04/21/12 11:29 AM
Bulldozer's isn't bad.	hcl64	04/27/12 05:58 PM
Bulldozer's isn't bad.	anon	04/27/12 06:16 PM
Bulldozer's isn't bad.	hcl64	04/27/12 07:33 PM
Bulldozer's isn't bad.	rwessel	04/27/12 11:12 PM
Bulldozer's isn't bad.	EduardoS	04/28/12 09:29 AM
Bulldozer's isn't bad.	EduardoS	04/28/12 09:30 AM
Bulldozer's isn't bad.	Michael S	04/28/12 12:36 PM
Bulldozer is made for SPEC fp	Pelle-48	04/21/12 11:41 AM
Bulldozer's Oddities.	mpx	04/22/12 03:47 AM
Bulldozer's Oddities.	EduardoS	04/22/12 01:57 PM
Bulldozer's Oddities.	mpx	04/23/12 07:04 AM
Bulldozer's Oddities.	Eric	04/23/12 12:33 PM
Bulldozer's Oddities.	EduardoS	04/23/12 02:22 PM
Bulldozer's Oddities.	Eric	04/23/12 07:30 PM
Bulldozer's Oddities.	hcl64	04/27/12 06:16 PM
Bulldozer's Oddities.	Y	04/25/12 04:34 AM
Bulldozer's IDIV	Heikki Kultala	04/27/12 10:56 PM
Bulldozer's IDIV	Y	04/30/12 01:51 AM
Bulldozer's IDIV	EduardoS	04/30/12 05:39 AM
Bulldozer's IDIV	P3Dnow	05/08/12 01:23 AM
Bulldozer's IDIV	Exophase	05/08/12 07:37 AM
Bulldozer's Oddities.	EduardoS	04/23/12 02:15 PM
Clustered MT as SMT for high frequency	Paul A. Clayton	04/20/12 04:10 PM
Clustered MT as SMT for high frequency	hcl64	04/28/12 12:56 AM
Clustered MT as SMT for high frequency	anonymous	04/28/12 01:43 AM
Clustered MT as SMT for high frequency	hcl64	04/28/12 02:59 PM
Clustered MT as SMT for high frequency	anonymous	04/28/12 08:45 PM
Clustered MT as SMT for high frequency	anon	04/28/12 02:13 AM
Clustered MT as SMT for high frequency	hcl64	04/28/12 03:23 PM
Clustered MT as SMT for high frequency	anon	04/28/12 06:19 PM
Clustered MT as SMT for high frequency	hcl64	04/28/12 07:58 PM
Clustered MT as SMT for high frequency	David Kanter	04/28/12 06:38 AM
Guessed meaning of "strong dependency model"	Paul A. Clayton	04/28/12 07:24 AM
Guessed meaning of "strong dependency model"	EduardoS	04/28/12 09:46 AM
Right meaning about "strong dependency model"	hcl64	04/28/12 04:59 PM
Clustered MT as SMT for high frequency	hcl64	04/28/12 04:24 PM
Clustered MT as SMT for high frequency	anonymous	04/28/12 08:50 PM
Clustered MT as SMT for high frequency	hcl64	04/28/12 09:47 PM
SNB width	David Kanter	04/28/12 09:48 PM
SNB width	hcl64	04/29/12 02:24 AM
Clustered MT as SMT for high frequency	David Kanter	04/28/12 09:56 PM
Clustered MT as SMT for high frequency	hcl64	04/28/12 11:44 PM
SOI, FD vs. PD	David Kanter	04/29/12 07:19 AM
SOI, FD vs. PD	hcl64	04/29/12 05:31 PM
SOI, FD vs. PD	David Kanter	04/29/12 11:26 PM
SOI, FD vs. PD	hcl64	04/30/12 08:08 AM
SOI, FD vs. PD	David Kanter	04/30/12 09:59 AM
SOI, FD vs. PD	hcl64	04/30/12 06:10 PM
SOI, FD vs. PD	David Kanter	04/30/12 06:32 PM
SOI, FD vs. PD	hcl64	04/30/12 10:47 PM
SOI, FD vs. PD	David Kanter	05/01/12 02:24 AM
SOI, FD vs. PD	hcl64	05/01/12 05:46 AM
SOI, FD vs. PD	hcl64	05/01/12 06:37 AM
SOI, FD vs. PD	David Kanter	05/01/12 08:19 AM
SOI, FD vs. PD	hcl64	05/01/12 07:39 AM
PD-SOI	David Kanter	05/02/12 12:22 PM
SOI, FD vs. PD	slacker	04/30/12 08:10 PM
SOI, FD vs. PD	David Kanter	04/30/12 10:16 PM
SOI, FD vs. PD	slacker	05/01/12 10:04 PM
SOI, FD vs. PD	David Kanter	05/02/12 08:19 AM
SOI, FD vs. PD	zou	05/02/12 12:23 PM
Previous discussion of clustered MT	Paul A. Clayton	04/28/12 07:00 AM
Previous discussion of clustered MT	hcl64	04/28/12 09:38 PM
Previous discussion of clustered MT	David Kanter	04/30/12 04:37 PM
Previous discussion of clustered MT	hcl64	04/30/12 07:24 PM
Previous discussion of clustered MT	David Kanter	04/30/12 07:40 PM
Previous discussion of clustered MT	hcl64	05/01/12 09:15 AM
Latency issues	David Kanter	05/02/12 12:01 PM
So, what do people think of these numbers>	Megol	04/21/12 01:57 AM

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Body:	No Text EduardoS (no.delete@this.spam.com) on April 27, 2012 1:27 pm wrote: > David Kanter (dkanter@realworldtech.com) on 4/27/12 wrote: > --------------------------- > >Absolutely. In fact, it's more useful in the context of the K8 than Sandy Bridge. > >The K8 cannot re-order so you REALLY want to calculate every address as soon as possible. > > It's not just to calculate address as soon as possible, it also help in packing x86 instructions > inside the chip and reduce the size of the forwarding network, if there was two decoupled AGUs > there would be 5 sources from the forwarding network per ALU, coupled there are only four. > > Does anyone knows if being a power of 2 helps? >
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