On Wed, Sep 5, 2012 at 12:16 AM, Roland Mainz <roland.ma...@nrubsig.org> wrote: > Hi! > > ---- > > Mostly offtopic for this list: > TheRegister.co.uk has a small article about the ne SPARC64-X processor > - see http://www.theregister.co.uk/2012/09/04/fujitsu_sparc64_x_processor/ > > Noteable (for us) feature is the Decfloat accelerator... which is IMHO > an indicator that Decimal floating point has become more important > (remember the old proposal for typeset -D and typeset -lD to define > |decimal64| and |decimal128| datatypes (agghllrr... does anyone > remember which printf format letters are reserved for DecFloat ?))
The 'reserved' letters in printf formats for decimal floating point are %D and %H, it will be used to represent decimal floating point formats in the future (i.e. the decimal floating point length modifiers for printf and scanf floating point conversion specifiers (a, A, e, E, f, F, g, G) are DF for _Decimal32, DD for _Decimal64, and DL for _Decimal128). References: - http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1312.pdf - http://www.opensource.apple.com/source/gcc/gcc-5659/gcc/testsuite/gcc.dg/format/dfp-printf-1.c For those who think decimal floating point support is far away: AIX and HP-UX already support decimal floating point in libc and one major x86 vendor is going to add hardware support in its next generation of CPUs. No surprises here. But seeing this in Fujitsu SPARC64 was even a surprise for me since Fujitsu is very conservative in adding new ABI related features. If they add it then it must have become very important. Irek _______________________________________________ ast-developers mailing list ast-developers@research.att.com https://mailman.research.att.com/mailman/listinfo/ast-developers
