On Wed, Jan 10, 2007 at 11:40:46AM -0800, H. J. Lu wrote: > Both AMD and Intel like to have BID as a configure time option > for DFP. Intel is planning to contribute a complete BID runtime > library, which can be used by executables generate by gcc. > > As the first step, we'd like to contribute a BID<->DPD library so that > BID can be used with libdecnumber by executables generate by gcc > before the complete BID runtime library is ready. > > Any comments?
libdecnumber doesn't use DPD (densely packed decimal), it uses the decNumber format. Functions in libgcc convert from DPD to decNumber, call into libdecnumber to do computations, and then convert the result back to DPD. It's all parameterized in dfp-bit.[ch], so replacing conversions between decNumber structs and DPD with conversions between decNumber structs and BID (binary integer decimal) should be straightforward; I don't think there's any need to convert between BID and DPD to use libdecnumber. If all x86* targets will use BID then there's no need for a configure option. Initial support using DPD for x86* was a proof of concept, I doubt that anyone would care if you replace it with BID support. Janis
