On Mon, Mar 8, 2010 at 4:27 PM, Frank Isamov <frank.isa...@gmail.com> wrote: > On Mon, Mar 8, 2010 at 8:29 AM, Joern Rennecke > <joern.renne...@embecosm.com> wrote: >> Quoting Frank Isamov <frank.isa...@gmail.com>: >> >>> Hi, >>> >>> I'd like to make a backend which would have 48 bits for 'long' type. >>> (32 for int and 64 for long long). >>> >>> I have tried to define: >>> #define LONG_TYPE_SIZE 48 >> >> That's not a partial integer mode; PDImode would have the same size as >> DImode, >> just not all bits would be significant. >> >>> and one of: >>> INT_MODE (PDI, 6); >> >> And that wouldn't be PDImode, more like THImode (three-halves integer mode, >> going by the precedent of TQFmode - three-quarter float mode - of the 1750a >> port in GCC prior to version 3.1) >> > > > I am sorry, I still can conclude how to make the backend use a certain > mode for 'long' type. > My architecture implements 32- and 48- bit registers and instructions > operating on these registers. That it why my intention is to use 'int' > for 32 and 'long' for 48 bit operations. My attempts lead to the > backend ignore 48 bits path inspite of the LONG_TYPE_SIZE definition > and 'long' is still processed as 32 bit value. I think I am missing > something, so I am applying for help. Any piece of information would > be useful. > > Thank you, > Frank >
Correction: "I still can conclude " should be read as "I still cannot conclude"
