Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread Francesco Riosa
Tom Smith wrote: Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support on a Pentium II, will the program run slower than it otherwise would? (Some of the programs I have are compiled and then distributed to servers

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread John Myers
On Friday 13 January 2006 07:45, Francesco Riosa wrote: Tom Smith wrote: Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support on a Pentium II, will the program run slower than it otherwise would? (Some of the

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread Raphael Melo de Oliveira Bastos Sales
Actually, mmx doesn't really mean anything: http://en.wikipedia.org/wiki/MMX mplayer and the X server gain performance by using these extensions (mmx, sse, sse2). One of the reasons why X is much faster in Gentoo than in Debian. (Personal Experience, please, no flames) 2006/1/13, John Myers

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread Trenton Adams
On 1/12/06, John Myers [EMAIL PROTECTED] wrote: On Thursday 12 January 2006 18:45, Tom Smith wrote: Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support on a Pentium II, will the program run slower than it

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread Trenton Adams
On 1/13/06, Raphael Melo de Oliveira Bastos Sales [EMAIL PROTECTED] wrote: Actually, mmx doesn't really mean anything: http://en.wikipedia.org/wiki/MMX mplayer and the X server gain performance by using these extensions (mmx, sse, sse2). One of the reasons why X is much faster in Gentoo

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-13 Thread John Myers
On Friday 13 January 2006 14:24, Trenton Adams wrote: On 1/12/06, John Myers [EMAIL PROTECTED] wrote: On Thursday 12 January 2006 18:45, Tom Smith wrote: Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support

[gentoo-user] USE flags: mmx sse sse2

2006-01-12 Thread Tom Smith
Are these flags mutually exclusive? I know, for example, that if I have a Pentium II that the MMX flag should apply while the sse and sse2 flags would not. But what if I have a Pentium III or IV? Would I only use the most recent optimization or do I need to add all three to take advantage of

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-12 Thread Willie Wong
On Thu, Jan 12, 2006 at 03:09:40PM -0700, Penguin Lover Tom Smith squawked: Are these flags mutually exclusive? I know, for example, that if I have a Pentium II that the MMX flag should apply while the sse and sse2 flags would not. But what if I have a Pentium III or IV? Would I only use

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-12 Thread Raphael Melo de Oliveira Bastos Sales
Certain program have support for either of these extentions. The program will most likely use the best one for the job. They can be mutually exclusive, however, if you use the CFLAG -mfpmath=sse,387. As far as I know it, it will try to use SSE instructions for math where possible, in detriment of

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-12 Thread Tom Smith
Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support on a Pentium II, will the program run slower than it otherwise would? (Some of the programs I have are compiled and then distributed to servers with different

Re: [gentoo-user] USE flags: mmx sse sse2

2006-01-12 Thread John Myers
On Thursday 12 January 2006 18:45, Tom Smith wrote: Well, if they're /not/ mutually exclusive, another question that comes up is... If a program is compiled with sse or sse2 support on a Pentium II, will the program run slower than it otherwise would? (Some of the programs I have are