Re: [RFC] MIPS ABI Extension for IEEE Std 754 Non-Compliant Interlinking

2016-01-06 Thread Maciej W. Rozycki
On Fri, 27 Nov 2015, Joseph Myers wrote: > > I find it highly unlikely though that the writers will (be able to) chase > > individual targets and any obscure hardware-dependent options the targets > > may provide. And we cannot expect people compiling software to be > > What that says to me i

Re: GNU C library's libmvec and the GNU Compiler *Collection*.

2016-01-06 Thread Toon Moene
On 01/06/2016 07:46 PM, Toon Moene wrote: [ This is relevant for our code, because just the switch to *actual* single precision exp/log/sin/cos implementations in glibc's libm resulted in a decrease of the running time of our weather forecasting code by 25 % (this was in glibc 2.16, IIR

gcc-4.9-20160106 is now available

2016-01-06 Thread gccadmin
Snapshot gcc-4.9-20160106 is now available on ftp://gcc.gnu.org/pub/gcc/snapshots/4.9-20160106/ and on various mirrors, see http://gcc.gnu.org/mirrors.html for details. This snapshot has been generated from the GCC 4.9 SVN branch with the following options: svn://gcc.gnu.org/svn/gcc/branches

Re: Strange C++ function pointer test

2016-01-06 Thread Jonathan Wakely
On 4 January 2016 at 09:32, Florian Weimer wrote: > On 12/31/2015 01:31 PM, Jonathan Wakely wrote: >> On 31 December 2015 at 11:37, Marc Glisse wrote: >>> That's what I called "bug" in my message (there are a few bugzilla PRs for >>> this). It would probably work on Solaris. >> >> Yes, the case is

Re: Strange C++ function pointer test

2016-01-06 Thread Jonathan Wakely
On 2 January 2016 at 11:42, Jonathan Wakely wrote: > On 31 December 2015 at 18:49, James Dennett wrote: >> On Thu, Dec 31, 2015 at 4:42 AM, Jonathan Wakely >> wrote: >>> >>> On 31 December 2015 at 11:54, Dominik Vogt wrote: >>> > Is there a requirement for a certain minimum Glibc version for >>>

GNU C library's libmvec and the GNU Compiler *Collection*.

2016-01-06 Thread Toon Moene
All, I noticed, around half a year ago, that the incredible team around glibc found the time to implement vector math (libm) routines. Previously, free software adherents like me were dependent on vendor libraries via the -mveclibabi={svml|acml} (on Intel/AMD) for instance. However, the exa

Re: ivopts vs. garbage collection

2016-01-06 Thread Jeff Law
On 01/06/2016 08:17 AM, Ian Lance Taylor wrote: The bug report https://golang.org/issue/13662 describes a case in which ivopts appears to be breaking garbage collection for the Go compiler. There is an array allocated in memory, and there is a loop over that array. The ivopts optimization is ta

ivopts vs. garbage collection

2016-01-06 Thread Ian Lance Taylor
The bug report https://golang.org/issue/13662 describes a case in which ivopts appears to be breaking garbage collection for the Go compiler. There is an array allocated in memory, and there is a loop over that array. The ivopts optimization is taking the only pointer to the array and subtracting

Re: RS6000/PowerPC -mpaired

2016-01-06 Thread Segher Boessenkool
On Tue, Jan 05, 2016 at 05:43:47PM +, Alan Lawrence wrote: > Can anyone give me any pointers on how to use the -mpaired option ("PowerPC > 750CL paired-single instructions") ? Configure your compiler with --target=powerpc-elf-paired, maybe add --with-cpu=750 ? > I'm trying to get it to use t