U++ forum: Welcome to the forum

Status & Roadmap

Authors & License

Funding Ultimate++

Search on this site

Search in forums

Home » Developing U++ » U++ Developers corner » What does SSE2 usage enhance?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Return to the default flat view

Create a new topic

Submit Reply

Re: What does SSE2 usage enhance? [message #39684 is a reply to message #39682]

Wed, 17 April 2013 11:17

mirek is currently offline

mirek
Messages: 13980
Registered: November 2005

Ultimate Member

crydev wrote on Wed, 17 April 2013 04:54

Thanks Mirek for your reply. Does that mean a SSE enabled version of functions as memcpy() can be used in U++? Or can I assume that by enabling SSE2 in the compiler flags automatically enables a SSE2 enabled version of memcpy? I think the Windows stock function is fairly slow.

SSE2 flag is likely to have no impact on memcpy. If it is emitted as function call (not intrinsics), it is likely that the function is SSE2 optimized anyway. For intrinsics, SSE2 code is way too complicated.

The main difference is in code using FP arithmetics: without SSE2, it is using x87 FP stack, with SSE2 it is using XMM register file, which is potentially faster.

Mirek

Report message to a moderator

Send a private message to this user

[Message index]

		What does SSE2 usage enhance? By: crydev on Wed, 10 April 2013 13:31
		Re: What does SSE2 usage enhance? By: mirek on Mon, 15 April 2013 18:34
		Re: What does SSE2 usage enhance? By: crydev on Wed, 17 April 2013 10:54
		Re: What does SSE2 usage enhance? By: mirek on Wed, 17 April 2013 11:17
		Re: What does SSE2 usage enhance? By: mirek on Wed, 17 April 2013 11:20
		Re: What does SSE2 usage enhance? By: crydev on Wed, 17 April 2013 22:04
		Re: What does SSE2 usage enhance? By: mirek on Thu, 18 April 2013 06:34
		Re: What does SSE2 usage enhance? By: crydev on Thu, 18 April 2013 08:33
		Re: What does SSE2 usage enhance? By: mirek on Thu, 18 April 2013 10:38
		Re: What does SSE2 usage enhance? By: crydev on Thu, 18 April 2013 11:43
		Re: What does SSE2 usage enhance? By: mirek on Thu, 18 April 2013 11:58

Previous Topic:	What does !! in e.g. FtpClient class mean?
Next Topic:	Stripping U++

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

PDF

]

Current Time: Tue May 14 03:12:54 CEST 2024

Total time taken to generate the page: 0.02453 seconds