--- Comment #15 from hjl at lucon dot org 2006-02-11 20:17 ---
FYI, -march=i686 turns on -mtune=generic32 in 4.2, while it turns on
-mtune=pentiumpro in gcc 4.0 and 4.1. I backported the patch to 4.1:
http://gcc.gnu.org/ml/gcc-patches/2006-01/msg01436.html
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http://gcc.gnu.org/bug
--- Comment #14 from steven at gcc dot gnu dot org 2006-02-11 11:36 ---
And so does GCC 4.1.
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steven at gcc dot gnu dot org changed:
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--- Comment #13 from steven at gcc dot gnu dot org 2006-02-11 11:27 ---
GCC 4.2 gives me the code with eax again.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23523
--- Comment #12 from dann at godzilla dot ics dot uci dot edu 2005-11-03
07:51 ---
(In reply to comment #11)
> (In reply to comment #10)
> > I am not sure what kind of answer you expect here.
> > Speed and code size are not disjoint. Think about I-cache and I-TLB misses.
> But again wh
--- Comment #11 from pinskia at gcc dot gnu dot org 2005-11-03 02:40
---
(In reply to comment #10)
> I am not sure what kind of answer you expect here.
> Speed and code size are not disjoint. Think about I-cache and I-TLB misses.
But again who is using an pentiumpro machine any more.
--- Comment #10 from dann at godzilla dot ics dot uci dot edu 2005-11-03
02:34 ---
(In reply to comment #9)
> Have you tested the speed? As I said I really doubt it makes a real world
> change in terms of speed. This is different from code size.
I am not sure what kind of answer you
--- Comment #9 from pinskia at gcc dot gnu dot org 2005-11-03 02:15 ---
Have you tested the speed? As I said I really doubt it makes a real world
change in terms of speed. This is different from code size. If you want it
smaller use -Os or -march=pentium3 (as i686 is faster when split
--- Comment #8 from dann at godzilla dot ics dot uci dot edu 2005-11-03
02:12 ---
(In reply to comment #6)
> The use of ax vs cx will not matter in the real world.
This is from a real world program (xterm) and it seems to matter, when using
eax the code is smaller.
Are you sure that t
--- Comment #7 from pinskia at gcc dot gnu dot org 2005-11-03 01:42 ---
Remember if you care about code size use -Os.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23523
--- Comment #6 from pinskia at gcc dot gnu dot org 2005-11-03 01:39 ---
The use of ax vs cx will not matter in the real world.
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pinskia at gcc dot gnu dot org changed:
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--- Comment #5 from dann at godzilla dot ics dot uci dot edu 2005-11-03
01:27 ---
(In reply to comment #4)
> This is actually invalid as nothing happens for -Os case so what you are
> seeing
> is just an atrifact.
Sorry but this explanation for marking the PR invalid does not make sen
--- Comment #4 from pinskia at gcc dot gnu dot org 2005-11-03 01:04 ---
This is actually invalid as nothing happens for -Os case so what you are seeing
is just an atrifact.
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pinskia at gcc dot gnu dot org changed:
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