EGCS vs GCC performance

[Harvey J. Stein]

Richard Henderson <rth@cygnus.com> writes:

> On Sun, Jan 18, 1998 at 10:11:43AM +0200, Harvey J. Stein wrote:
> > What about on the Alphas?  Is the Haifa scheduler configured properly
> > for the Dec Alpha?  Or is one better off currently disabling Haifa?
> 
> It is configured properly for EV5 machines for certain. 

What about EV56s?  I presume that the same config would be fine?  And
as of what date is the above the case?  With egcs-1.0 on redhat 4.2 I
found egcs producing code which ran about the same as gcc 2.7.2.1,
sometimes a little slower (-O2 -mcpu=21164).  I tried to build
egcs-971225 & pre 1.0.1, but was unable to (because redhat 4.2's
binutils (v 2.7.0.2-4) was too old, I guess).  Presumably, for the
same reason I couldn't use -mcpu=21164a with egcs-971225.  How much of
a difference does -mcpu=21164 vs -mcpu=21164a make?

Thanks,

Harvey J. Stein
Berger Financial Research
hjstein@bfr.co.il