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Date: Tue, 20 Jul 2010 09:07:00 -0000
Subject: [Bug target/45000]  New: RX signed extened unsigned char or short return value.
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From: "kazuhiro dot inaoka dot ud at renesas dot com" <gcc-bugzilla@gcc.gnu.org>
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When a function return type is "unsigned char", the return value is sign
extended by "MOV" instruction.
It should be "MOVU" instruction.

ex)
unsigned char uA;

unsigned char
func()
{
  return uA;
}

NG)
_func:
        mov.L   #_uA, r14
        mov.B   [r14], r1
        rts
        .size   _func, .-_func
        .comm   _uA,1,4


-- 
           Summary: RX signed extened unsigned char or short return value.
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazuhiro dot inaoka dot ud at renesas dot com
 GCC build triplet: i686-linux
  GCC host triplet: i686-linux
GCC target triplet: rx-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45000