To all AVR GCC maintainers and distribution builders, The post below just came across the gcc-patches mailing list. AFAIK, these patches will be going into gcc future 4.5. The MPC package that it refers to will probably become a required prerequisite package some time in the future, like GMP and MPFR.
Also, how can AVR GCC take advantage of this in the future? Eric Weddington > -----Original Message----- > From: Kaveh R. GHAZI [mailto:gh...@caip.rutgers.edu] > Sent: Sunday, March 15, 2009 10:10 AM > To: gcc-patc...@gcc.gnu.org > Subject: [PATCH 4.5 0/N]: Integrate GCC with the complex math > library MPC > > This series of patches integrates GCC with the complex math > library MPC. > MPC is the complex analogue to MPFR. It is written by some > of the same > folks with the same accuracy and precision principles. MPC > is licensed > under the LGPL. See: http://www.multiprecision.org/mpc/ > > Among the potential benefits of using MPC are: > > 1. Folding of complex builtins with constant arguments in the > middle-end, e.g. csin(a + bI) -> c + dI. Of course complex > builtins may not start out with a constant argument, but various > optimizations may infer what the argument is and allow the folding > to occur. > > 2. Folding of fortran intrinsics. (These optimizations don't go > through the middle-end and so right now have duplicate > functionality). > > 3. Addressing complex folding bugs like PR30789 that can be tricky > to fix (even with MPFR). > > > MPC is currently under 0.x version development and is not entirely > complete with respect to c99 complex builtins yet (but their > plan is to do > all of the c99 math functions with c99 semantics for the > special cases.) > Also as far as I'm aware, MPC is not yet included with > distros or binary > sites like MPFR is. > > Because of these issues, I have written the patch to make MPC's use > *optional* for now. So GCC developers without MPC should not notice > anything. And I have only implemented item #1 above for middle-end > builtins all conditionalized on configure finding the library > and ensuring > the necessary bits are available. We can obviously revisit > this decision > and hard require MPC when it's more mature. > > Although not all C99 functions are complete in the latest > MPC, I'd like to > get the bulk infrastructure installed now. As new complex > functions are > added to MPC I will update the middle-end and testcases > accordingly. The > patches that follow are split up by maintenance domain to > make reviewing > easier. > > Thanks, > --Kaveh > > -- > Kaveh R. Ghazi gh...@caip.rutgers.edu > _______________________________________________ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list