From: frank denis <Frank DOT Denis AT epita DOT fr>
Message-Id: <199605051447.OAA13795@aux.epita.fr>
Subject: Re: register calling convention
To: orly AT abigail DOT eee DOT upd DOT edu DOT ph (Orlando Andico)
Date: Sun, 5 May 1996 14:47:56 +0000 (GMT)
Cc: djgpp AT delorie DOT com
In-Reply-To: <Pine.LNX.3.91.960502190654.3231B-100000@abigail.eee.upd.edu.ph> from "Orlando Andico" at May 2, 96 07:10:56 pm
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Hello ! In a previous mail, our friend Orlando Andico said :
-=)> I got another question (not really related to DJGPP): does GCC-2.7.2 have 
-=)> any internal support for Pentium optimization? even with 2.7.0 (I was 
-=)> compiling a Linux kernel) the Makefile produced some weird commandline 
-=)> switches which I assumed were Pentium optimizations (since in the 
-=)> configuration it asked what kind of processor the target was).

  The only thing Linux adds to the command line when you specify "Pentium"
optimizations is that the function and loops alignment may be 2 bytes
instead of 4 on a 486. This only reduces the size of the executable file,
without any speed change.  Indeed, there were two releases of GCC patched
by Intel themselves that implemented some more advanced features for the
Pentium, and I was told it resulted in a speed gain of about 10%. But GCC,
even the latest release, has no built-in support for Pentium yet, but
indeed, this would be a great improvement to add.

  Best regards, Frank.
--
.-=)>       Frank DENIS aka JEDI from SECTOR ONE ( j AT nether DOT net )        <(=-. 
\   Serveur minitel RTC-One au prix d'une simple communication sur Paris :   /
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 \_-^-_.  mk AT epita DOT edu -=- linux AT epita DOT edu -=- jedi AT the_one DOT epita DOT fr  ._-^-_/