On Fri, 1 Jul 2011, Bernd Schmidt wrote: > On 07/01/11 23:18, Bernd Schmidt wrote: > >> What is the function of having both PARTIAL_INT_MODE and > >> FRACTIONAL_INT_MODE? > > > > Not having to change all the targets using PARTIAL_INT_MODE immediately > > to use the better mechanism. > > Also, come to think of it, preventing the rest of the compiler from > trying to use such a mode in case the target only supports some very > specific operations on it. A port could choose to use PImode, defined in
We have well-established ways of indicating supported operations with hooks (used for example to limit operations on __fpreg and __fp16 in the front ends) and optabs. -- Joseph S. Myers jos...@codesourcery.com
