[Bug c/41989] New: Code optimized for AMD Geode is slower than generic

[rootkit85 at yahoo dot it]

I noticed that when compiling with -march=geode the code is actually slower
than the one generated with generic options (i386 or i686).
This happens with any program, not just with dhrystone

# CFLAGS='-march=i386' ./dry.c
Dhrystones per Second:                          643501 

# CFLAGS='-march=i486' ./dry.c
Dhrystones per Second:                          712251 

# CFLAGS='-march=i586' ./dry.c
Dhrystones per Second:                          711238

# CFLAGS='-march=i686' ./dry.c
Dhrystones per Second:                          878735

# CFLAGS='-march=geode' ./dry.c
Dhrystones per Second:                          684932


-- 
           Summary: Code optimized for AMD Geode is slower than generic
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rootkit85 at yahoo dot it


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41989