On Thu, 28 May 2015, James Cowgill wrote:
> Your test case is wrong. If compiled without optimization, GCC call
> 'sqrt' from glibc instead of using the sqrt.s MIPS instruction. With
> optimization GCC will remove the call altogether. This is different to
> fortran because in fortran SQRT is a bui
On Wed, 2015-05-27 at 20:46 +0200, Ole Streicher wrote:
> Hi all,
>
> Am 27.05.2015 um 15:45 schrieb James Cowgill:
> > There's probably still a hardware bug in here somewhere, but before 3.16
> > the kernel was fixing it with the math emulator.
>
> Without understanding the discussion in detail,
On Wed, 27 May 2015, Ole Streicher wrote:
> > If you suspect a bug in emulation, then please try narrowing it down to
> > the machine instruction that produces the wrong result, you might be able
> > to track it down in your Fortran program by single-stepping the program in
> > GDB.
>
> Sorr
Am 27.05.2015 um 21:06 schrieb Maciej W. Rozycki:
> On Wed, 27 May 2015, Ole Streicher wrote:
>
>> It is something specific what gfortran produces (and not gcc), and it is not
>> just a missing emulation (since normalized numbers work); it may be an
>> incomplete emulation.
>
> If you suspect a
On Wed, 27 May 2015, Ole Streicher wrote:
> It is something specific what gfortran produces (and not gcc), and it is not
> just a missing emulation (since normalized numbers work); it may be an
> incomplete emulation.
If you suspect a bug in emulation, then please try narrowing it down to
the m
Hi all,
Am 27.05.2015 um 15:45 schrieb James Cowgill:
> There's probably still a hardware bug in here somewhere, but before 3.16
> the kernel was fixing it with the math emulator.
Without understanding the discussion in detail, I'd like to bring a few
points here back: the issue is not about SIGI
On Wed, 27 May 2015, James Cowgill wrote:
> > > Commit 2d83fea786d7 in 4.1-rc1 ('MIPS: Correct FP ISA requirements')
> > > fixed the underlying sqrt.s emulation bug.
> > >
> > > It would be good if the 4.1-rc1 patch or at least the 'case fsqrt_op'
> > > part (which is the fix for this bug) can be
On Wed, 27 May 2015, James Cowgill wrote:
> Thanks! The kernel was the important part which was different to my
> setup.
>
> There's probably still a hardware bug in here somewhere, but before 3.16
> the kernel was fixing it with the math emulator.
>
> From what I can see:
> Commit 08a07904e182
On Wed, 2015-05-27 at 18:13 +0100, Maciej W. Rozycki wrote:
> On Wed, 27 May 2015, James Cowgill wrote:
>
> > Thanks! The kernel was the important part which was different to my
> > setup.
> >
> > There's probably still a hardware bug in here somewhere, but before 3.16
> > the kernel was fixing i
Processing control commands:
> reassign -1 src:linux 3.16.7-ckt9-2
Bug #781892 [gfortran-4.9] gfortran-4.9: denormal value produces illegal
instruction on mipsel
Bug reassigned from package 'gfortran-4.9' to 'src:linux'.
No longer marked as found in versions gcc-4.9/4.9.2-10.
Ignoring request to
Control: reassign -1 src:linux 3.16.7-ckt9-2
Control: retitle -1 linux: mips sqrt.s instruction not emulated on Loongson
processors
Control: tags -1 fixed-upstream
# Will be fixed in 4.1
On Tue, 2015-05-26 at 20:21 +0300, Aaro Koskinen wrote:
> On Tue, May 26, 2015 at 10:13:35AM +0100, James Cowg
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