This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: Feature request: ability to describe x86 register halves as contraints.
- To: Joern Rennecke <amylaar at cygnus dot co dot uk>
- Subject: Re: Feature request: ability to describe x86 register halves as contraints.
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Wed, 01 Jul 1998 11:39:35 -0600
- cc: bcurrie at tssc dot co dot nz, ak at muc dot de, egcs at cygnus dot com
- Reply-To: law at cygnus dot com
In message <199807011632.RAA30645@phal.cygnus.co.uk>you write:
> > Seems to me it would need an expression and two integer args -- the
> > expresion is the data item (ie a register) that we want to operate
> > on, then start offset (in bits) and width (in bits).
>
> Why is a mode not good enough to represent the size?
I guess that would be OK. I'm still not convinced it's worth the huge
effort though.
jeff