CFLAGS for tc1000

From: Xue Zhixing <xue_at_ira.uka.de>
Date: Wed, 22 Dec 2004 10:56:31 +0000

Hi all,
  before I build all the programms from gentoo stage1, I want to get the
optimized CFLAG. I've read the article at
http://www.geocities.com/robm351/lifebook/ and get the CFLAGS below:

gcc 3.x
-O3 -march=i686 -pipe
-fomit-frame-pointer
-mpreferred-stack-boundary=2
-falign-functions=0 -falign-jumps=0
-falign-loops=0

But maybe someone here have used acovea before, here's the result after
9 hours "evlutionary algorithm":

optimistic options:
      -foptimize-sibling-calls (1.035)
             -fcse-skip-blocks (1.307)
     -fexpensive-optimizations (1.307)
                   -fforce-mem (1.08)
              -fschedule-insns (1.261)
                  -fsched-spec (1.216)
            -finline-functions (2.077)
                     -mieee-fp (1.986)
                -malign-double (1.714)
   -funsafe-math-optimizations (2.439)

pessimistic options:
            -fno-loop-optimize (-1.003)
             -fschedule-insns2 (-1.093)
                     -fregmove (-1.32)
                 -ffloat-store (-2.09)
                   -fno-inline (-2.09)
                      -fnew-ra (-2.09)
            -funroll-all-loops (-1.139)
                  -mfpmath=387 (-1.456)
                  -mfpmath=sse (-1.501)
          -fomit-frame-pointer (-1.275)

I had to use gcc33_pentium3.acovea, because the others all failed. And I
cannot find any acovea file for crusoe.

Any idea here, what CFLAGS should be used?

thank you and merry chrismas ;-)

xue
Received on Wed Dec 22 2004 - 04:58:27 EST

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