This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: How to support 40bit GP register


On 11/09/2009 06:13 AM, Mohamed Shafi wrote:
   Ok i have comparison patterns written in RImode. When you say that i
will wind up with a selection of patterns do you mean to say that i
should have patterns for operations that operate on full 40bits in
RImode and disable the corresponding SImode patterns? Or is it that i
have to write nameless patterns in RImode for arithmetic operations
and look at the dumps to see how the combiner will merge the patterns
so that it can match the comparison operations?

The later.



r~



Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]