[Bug c/25565] New: GCC compiled with --target=powerpcle-*-eabi produces big-endian logic with little-endian ordering

[aweiner at lsil dot com]

I built GCC 4.0.2 with --target=powerpcle-440-eabi. The resulting GCC produces
little-endian objects but with big-endian logic (big-endian register and
load/store usage). I can force the compiler to use little-endian logic by
specifying -mlittle on the command line...but does powerpcle-*-eabi not imply a
default of little-endian for both byte ordering and logic? Secondary issue is
that the GCC libaries built with --target=poerpcle-*-eabi contain big-endian
logic and so will break with compiled code meant to use -mlittle.

Source:
typedef long long LL;
LL increment(LL x) {
        return x+1;
}

Object compiled with "-O2":

00000000 <increment>:
   0:   01 00 84 30     addic   r4,r4,1 /* big-endian logic, little-endian
ordering */
   4:   94 01 63 7c     addze   r3,r3
   8:   20 00 80 4e     blr

Object compiled with "-O2 -mlittle":
00000000 <increment>:
   0:   01 00 63 30     addic   r3,r3,1 /* little-endian logic, little-endian
ordering */
   4:   94 01 84 7c     addze   r4,r4
   8:   20 00 80 4e     blr

Object compiled with "-O2 -mbig":
00000000 <increment>:
   0:   30 84 00 01     addic   r4,r4,1 /* big-endian logic, big-endian
ordering */
   4:   7c 63 01 94     addze   r3,r3
   8:   4e 80 00 20     blr


-- 
           Summary: GCC compiled with --target=powerpcle-*-eabi produces
                    big-endian logic with little-endian ordering
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: aweiner at lsil dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25565