Hello everyone, I have got interesting results from my test of SSE2
switch.
I tested a small code fragment with and without SSE2 swith and I Saw no
difference.
Why is this?
Iused FPC 2.0 on WIN 32 to compile it with Best optimization
Code fragment follows:
{$fputype sse2}
program divide;
uses windows;
var time1,time2:dword;
a,b,c:double;
i,j:dword;
begin
a:=123456789.1234567;
b:=1.987654587;
for i:=1 to 3 do
begin
time1:=gettickcount;
for j:=1 to 100000000 do c:=a/b;
time2:=gettickcount;
writeln('time ',i,' ',(time2-time1)/1000:0:3);
end;
end.The Time I measured was from 3 sec to 1,6 sec. I didn't use very exact method of measurement but... Any help or idea would be appreciated. Pianoman P.S. program was ran on P4 with SSE ----- Original Message ----- 2 2,4g Hz. From: <[EMAIL PROTECTED]> To: <fpc-pascal@lists.freepascal.org> Sent: Thursday, June 02, 2005 12:00 PM Subject: fpc-pascal Digest, Vol 10, Issue 2 > Send fpc-pascal mailing list submissions to > fpc-pascal@lists.freepascal.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of fpc-pascal digest..." > > > Today's Topics: > > 1. Re: Past list archives (Gerhard Scholz) > 2. Re: Past list archives (Vincent Snijders) > 3. Re: Optimizer in 2.0 (Florian Klaempfl) > 4. Re: Optimizer in 2.0 (Adrian Veith) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 1 Jun 2005 12:51:40 +0200 > From: "Gerhard Scholz" <[EMAIL PROTECTED]> > Subject: Re: [fpc-pascal] Past list archives > To: "FPC-Pascal users discussions" <fpc-pascal@lists.freepascal.org> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="iso-8859-1" > > Sorry, > > that list mentioned below: > > http://www.freepascal.org/mailist.html > > is dead. > > (Objekt nicht gefunden! Der angeforderte URL konnte auf dem Server nicht > gefunden werden.) > > Greetings > > Gerhard > > ----- Original Message ----- > From: "Jonas Maebe" <[EMAIL PROTECTED]> > To: "Mike's Mail" <[EMAIL PROTECTED]>; "FPC-Pascal users discussions" > <fpc-pascal@lists.freepascal.org> > Sent: Sunday, May 29, 2005 2:38 PM > Subject: Re: [fpc-pascal] Past list archives > > > > > > On 25 May 2005, at 14:47, Mike's Mail wrote: > > > > > Is there an active link for the archives that works, or who would I > > > contact to report the link, so it may be fixed? > > > > Yes, working links can be found on http://www.freepascal.org/ > > maillist.html > > > > > > Jonas > > > > PS: please turn off html posting in your mail client, it causes your > > posts to be held for approval (because the rule that stops such mails > > it also stops all viruses I know of) > > > > > > _______________________________________________ > > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > > > > > > > ------------------------------ > > Message: 2 > Date: Wed, 01 Jun 2005 13:30:38 +0200 > From: Vincent Snijders <[EMAIL PROTECTED]> > Subject: Re: [fpc-pascal] Past list archives > To: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Gerhard Scholz wrote: > > Sorry, > > > > that list mentioned below: > > > > http://www.freepascal.org/mailist.html > > > > is dead. > > but http://www.freepascal.org/maillist.html isn't. > > Vincent. > > > > ------------------------------ > > Message: 3 > Date: Wed, 01 Jun 2005 14:06:44 +0200 > From: Florian Klaempfl <[EMAIL PROTECTED]> > Subject: Re: [fpc-pascal] Optimizer in 2.0 > To: FPC-Pascal users discussions <fpc-pascal@lists.freepascal.org> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=us-ascii > > Adrian Veith wrote: > > It shows with useless code like simple nested for .. to loops, but also > > with some more useful code like the attached RSA_Angriff from the C'T > > magazine. > > > > My results are with: > > > > fpc -Sd -OG3rp3 -XX RSA_Angriff_D5.dpr > > > > 5266 ms > > > > with: > > > > fpc -Sd -XX RSA_Angriff_D5.dpr > > > > 4844 ms > > > > The unoptimized code is faster than the optimized code. > > For me the version compiled with -OG3rp3 is the fastest (AthlonXP). Just > curious, what CPU do you use? > > > > ------------------------------ > > Message: 4 > Date: Wed, 01 Jun 2005 16:47:57 +0200 > From: Adrian Veith <[EMAIL PROTECTED]> > Subject: Re: [fpc-pascal] Optimizer in 2.0 > To: fpc-pascal@lists.freepascal.org > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Florian Klaempfl schrieb: > > >Adrian Veith wrote: > > > > > >>It shows with useless code like simple nested for .. to loops, but also > >>with some more useful code like the attached RSA_Angriff from the C'T > >>magazine. > >> > >>My results are with: > >> > >>fpc -Sd -OG3rp3 -XX RSA_Angriff_D5.dpr > >> > >>5266 ms > >> > >>with: > >> > >>fpc -Sd -XX RSA_Angriff_D5.dpr > >> > >>4844 ms > >> > >>The unoptimized code is faster than the optimized code. > >> > >> > > > >For me the version compiled with -OG3rp3 is the fastest (AthlonXP). Just > >curious, what CPU do you use? > > > > > Intel Pentium M 730. > > I will do the test on a Athlon XP as well. Maybe the picture changes. > > > > > > ------------------------------ > > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > http://lists.freepascal.org/mailman/listinfo/fpc-pascal > > > End of fpc-pascal Digest, Vol 10, Issue 2 > ***************************************** > > > __________ Informacia od NOD32 1.1121 (20050601) __________ > > Tato sprava bola preverena antivirusovym systemom NOD32. > http://www.eset.sk > > _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
