* optimisation and AMD K7
@ 1999-12-27 4:51 Jean Francois PARIS
1999-12-27 8:37 ` Tim Prince
1999-12-31 22:24 ` Jean Francois PARIS
0 siblings, 2 replies; 6+ messages in thread
From: Jean Francois PARIS @ 1999-12-27 4:51 UTC (permalink / raw)
To: help-gcc
hi
I'm using a glibc2-linux-box. Which version of gcc or egcs and which
options should I use to get the best perf or the smaller exe. There are
some options for pentium : -mpentium. does some exist for amd K7
regards,
-------------------------------------
Paris jean-francois
jparis@prope.insa-lyon.fr
jfparis@cipcinsa.insa-lyon.fr
mjediyoda@multimania.com
-
ICQ #29259447
-
http://www.multimania.com/mjediyoda
-------------------------------------
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: optimisation and AMD K7
1999-12-27 4:51 optimisation and AMD K7 Jean Francois PARIS
@ 1999-12-27 8:37 ` Tim Prince
1999-12-31 22:24 ` Tim Prince
2000-01-02 20:20 ` David Edelsohn
1999-12-31 22:24 ` Jean Francois PARIS
1 sibling, 2 replies; 6+ messages in thread
From: Tim Prince @ 1999-12-27 8:37 UTC (permalink / raw)
To: help-gcc
>Which version of gcc or egcs and which
>options should I use to get the best perf or the smaller exe.
Your mileage surely will vary. gcc-2.95.2 does well on many examples; gcc-2.96
improves significantly in certain situations, and loses in others.
On x86 architectures, the option -Os, which is intended to produce smallest
code, often produces faster code as well, possibly in combination with
-funroll-loops or -funroll-all-loops.
I believe 2.96 has seen some work for k7. With 2.96, the combination
-march=pentiumpro -ffast-math activates conditional moves and the like, as well
as a number of bugs. The latest version of 2.96 has corrected some of the code
alignment problems of 2.95.2.
Tim Prince
tprince@computer.org
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: optimisation and AMD K7
1999-12-27 8:37 ` Tim Prince
@ 1999-12-31 22:24 ` Tim Prince
2000-01-02 20:20 ` David Edelsohn
1 sibling, 0 replies; 6+ messages in thread
From: Tim Prince @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
>Which version of gcc or egcs and which
>options should I use to get the best perf or the smaller exe.
Your mileage surely will vary. gcc-2.95.2 does well on many examples; gcc-2.96
improves significantly in certain situations, and loses in others.
On x86 architectures, the option -Os, which is intended to produce smallest
code, often produces faster code as well, possibly in combination with
-funroll-loops or -funroll-all-loops.
I believe 2.96 has seen some work for k7. With 2.96, the combination
-march=pentiumpro -ffast-math activates conditional moves and the like, as well
as a number of bugs. The latest version of 2.96 has corrected some of the code
alignment problems of 2.95.2.
Tim Prince
tprince@computer.org
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: optimisation and AMD K7
1999-12-27 8:37 ` Tim Prince
1999-12-31 22:24 ` Tim Prince
@ 2000-01-02 20:20 ` David Edelsohn
2000-04-01 0:00 ` David Edelsohn
1 sibling, 1 reply; 6+ messages in thread
From: David Edelsohn @ 2000-01-02 20:20 UTC (permalink / raw)
To: help-gcc
Note gcc-2.96 is the internal name used for the snapshots of the
unstable, development version of the compiler. There has been no gcc-2.96
release and the next release may or may not be named gcc-2.96.
David
--
===============================================================================
David Edelsohn T.J. Watson Research Center
dje@watson.ibm.com P.O. Box 218
+1 914 945 4364 (TL 862) Yorktown Heights, NY 10598
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: optimisation and AMD K7
2000-01-02 20:20 ` David Edelsohn
@ 2000-04-01 0:00 ` David Edelsohn
0 siblings, 0 replies; 6+ messages in thread
From: David Edelsohn @ 2000-04-01 0:00 UTC (permalink / raw)
To: help-gcc
Note gcc-2.96 is the internal name used for the snapshots of the
unstable, development version of the compiler. There has been no gcc-2.96
release and the next release may or may not be named gcc-2.96.
David
--
===============================================================================
David Edelsohn T.J. Watson Research Center
dje@watson.ibm.com P.O. Box 218
+1 914 945 4364 (TL 862) Yorktown Heights, NY 10598
^ permalink raw reply [flat|nested] 6+ messages in thread
* optimisation and AMD K7
1999-12-27 4:51 optimisation and AMD K7 Jean Francois PARIS
1999-12-27 8:37 ` Tim Prince
@ 1999-12-31 22:24 ` Jean Francois PARIS
1 sibling, 0 replies; 6+ messages in thread
From: Jean Francois PARIS @ 1999-12-31 22:24 UTC (permalink / raw)
To: help-gcc
hi
I'm using a glibc2-linux-box. Which version of gcc or egcs and which
options should I use to get the best perf or the smaller exe. There are
some options for pentium : -mpentium. does some exist for amd K7
regards,
-------------------------------------
Paris jean-francois
jparis@prope.insa-lyon.fr
jfparis@cipcinsa.insa-lyon.fr
mjediyoda@multimania.com
-
ICQ #29259447
-
http://www.multimania.com/mjediyoda
-------------------------------------
^ permalink raw reply [flat|nested] 6+ messages in thread
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1999-12-27 4:51 optimisation and AMD K7 Jean Francois PARIS
1999-12-27 8:37 ` Tim Prince
1999-12-31 22:24 ` Tim Prince
2000-01-02 20:20 ` David Edelsohn
2000-04-01 0:00 ` David Edelsohn
1999-12-31 22:24 ` Jean Francois PARIS
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