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Re: PATCH: reorg branch displacement fix
- From: Hans-Peter Nilsson <hp at bitrange dot com>
- To: Joern Rennecke <joern dot rennecke at superh dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Mon, 4 Nov 2002 20:40:30 -0500 (EST)
- Subject: Re: PATCH: reorg branch displacement fix
On Mon, 4 Nov 2002, Joern Rennecke wrote:
> Looking in google for fr30, it appears as if Fujitsu doesn't care about
> gcc at the moment; they talk about their 'Softune' IDE, but no word about
> GNU tools. Also the fr30 gdb port has been obsoleted...
And the fr30 port has been broken since some time after
2002-05-29. Build succeeded then but all the tests timed out.
I haven't tried it since. Hmm... better do that, then...
> - The c4x and cris do not even have a length attribute.
For the record: as you may imagine, the CRIS port trusts GAS
relaxation to handle varying-length branches (9-bit and 16-bit
including sign). It's my informed opinion that this is not
worth doing in GCC (for this target) just for sake of branch
shortening since asm:s *must* in GCC be considered of inordinate
length; GCC can't do better here than GAS anyway. (Still worth
doing for sake of switch tables; on the virtual TODO list.
Thanks to GAS broken-.word [don't puke!], offsets aren't too