On Mon, 23 Jan 2012, Paul S wrote: > Thanks Dave, > > I would never have guessed from gccinternals.pdf that it is possible to use > mode iterators to select predicates & constraints ...
Really? If you but if you have suggestions for improving the documentation, that'd be welcome. > I think I have a use for > this today :-) > > Cheers, Paul. > > On 20/01/12 10:26, Dave Korn wrote: > > On 17/01/2012 21:16, Paul S wrote: > > > > > > > For example the i386 seems to use predicates and constraints of the form > > > <*_operand> and<m/r/i> for the reload versions of these instructions - > > > and I haven't been able to find definitions of these or a mention in > > > gcc_internals.pdf of any special meaning assigned to the<> notation. > > > > > See http://gcc.gnu.org/onlinedocs/gccint/Substitutions.html, and take a > > look > > for the define_[code/mode]_[attr/iterator] definitions around line ~650ish > > of > > i386.md > > > > cheers, > > DaveK > > > > > > > > > >
