[Bug target/14915] Testsuite failure on mips-sgi-irix6.5 in gcc.dg/builtins-32.c

[wilson at specifixinc dot com]

------- Additional Comments From wilson at specifixinc dot com  2004-04-12 20:21 -------
Subject: Re:  New: Testsuite failure on mips-sgi-irix6.5
 in gcc.dg/builtins-32.c

ghazi at gcc dot gnu dot org wrote:
> Mips sets BITS_BIG_ENDIAN to zero, so it doesn't reverse the bitpos.  But if I 
> force it to do so, the testcase passes.  Like so:

BITS_BIG_ENDIAN only affects how we number bits within a 
{zero,sign}_extract.  MIPS has no bit field instructions, so no need to 
set BITS_BIG_ENDIAN.  We can give it an arbitrary value. 
BITS_BIG_ENDIAN should not be used for any other purpose.

It looks like the expand_builtin_signbit code should be using 
BYTES_BIG_ENDIAN instead of BITS_BIG_ENDIAN.  Endian-ness tests always 
use BYTES_BIG_ENDIAN.  Never use BITS_BIG_ENDIAN in an endianness test.

See also the docs for BITS_BIG_ENDIAN which mention this stuff.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14915