On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
> All,
>
> There seems to an optimization bug with clang on
>
> % uname -a
> FreeBSD mobile 13.0-CURRENT FreeBSD 13.0-CURRENT r344653 MOBILE i386
>
> IOW, if you do numerica work on i386, you may want to check your
> results.
This
On 3/14/19 1:08 PM, Steve Kargl wrote:
> On Fri, Mar 15, 2019 at 05:50:37AM +1100, Peter Jeremy wrote:
>> On 2019-Mar-13 23:30:07 -0700, Steve Kargl
>> wrote:
>>> AFAICT, all libm float routines need to be modified to conditional
>>> include ieeefp.h and call fpsetprec(FP_PD). This will work
On Thu, Mar 14, 2019 at 12:59:14PM -0700, John Baldwin wrote:
> On 3/14/19 12:20 PM, Konstantin Belousov wrote:
> > On Fri, Mar 15, 2019 at 05:50:37AM +1100, Peter Jeremy wrote:
> >> On 2019-Mar-13 23:30:07 -0700, Steve Kargl
> >> wrote:
> >>> AFAICT, all libm float routines need to be modified
On Fri, Mar 15, 2019 at 05:50:37AM +1100, Peter Jeremy wrote:
> On 2019-Mar-13 23:30:07 -0700, Steve Kargl
> wrote:
> >AFAICT, all libm float routines need to be modified to conditional
> >include ieeefp.h and call fpsetprec(FP_PD). This will work around
> >issues is FP and libm. FreeBSD needs
On 3/14/19 12:20 PM, Konstantin Belousov wrote:
> On Fri, Mar 15, 2019 at 05:50:37AM +1100, Peter Jeremy wrote:
>> On 2019-Mar-13 23:30:07 -0700, Steve Kargl
>> wrote:
>>> AFAICT, all libm float routines need to be modified to conditional
>>> include ieeefp.h and call fpsetprec(FP_PD). This
On Fri, Mar 15, 2019 at 05:50:37AM +1100, Peter Jeremy wrote:
> On 2019-Mar-13 23:30:07 -0700, Steve Kargl
> wrote:
> >AFAICT, all libm float routines need to be modified to conditional
> >include ieeefp.h and call fpsetprec(FP_PD). This will work around
> >issues is FP and libm. FreeBSD needs
On 2019-Mar-13 23:30:07 -0700, Steve Kargl
wrote:
>AFAICT, all libm float routines need to be modified to conditional
>include ieeefp.h and call fpsetprec(FP_PD). This will work around
>issues is FP and libm. FreeBSD needs to issue an erratum about
>the numerical issues with clang.
I vaguely
On Wed, Mar 13, 2019 at 11:30:07PM -0700, Steve Kargl wrote:
>
> Spent a couple hours wandering in contrib/llvm. Have no idea
> how to fix clang to actually work on i386/387. Any ideas
> would be welcomed.
>
> AFAICT, all libm float routines need to be modified to conditional
> include
On Wed, Mar 13, 2019 at 02:24:55PM -0700, Steve Kargl wrote:
> On Wed, Mar 13, 2019 at 10:16:12AM -0700, John Baldwin wrote:
> > On 3/13/19 9:40 AM, Steve Kargl wrote:
> > > On Wed, Mar 13, 2019 at 09:32:57AM -0700, John Baldwin wrote:
> > >> On 3/13/19 8:16 AM, Steve Kargl wrote:
> > >>> On Tue,
On Wed, Mar 13, 2019 at 10:16:12AM -0700, John Baldwin wrote:
> On 3/13/19 9:40 AM, Steve Kargl wrote:
> > On Wed, Mar 13, 2019 at 09:32:57AM -0700, John Baldwin wrote:
> >> On 3/13/19 8:16 AM, Steve Kargl wrote:
> >>> On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
>
> gcc8
On Wed, Mar 13, 2019 at 10:40:28AM -0700, Conrad Meyer wrote:
> Hi John,
>
> On Wed, Mar 13, 2019 at 10:17 AM John Baldwin wrote:
> > One issue I'm aware of is that clang does not have any support for the
> > special arrangement FreeBSD/i386 uses where it uses different precision
> > for
On Wed, Mar 13, 2019 at 10:16:12AM -0700, John Baldwin wrote:
> On 3/13/19 9:40 AM, Steve Kargl wrote:
> > On Wed, Mar 13, 2019 at 09:32:57AM -0700, John Baldwin wrote:
> >> On 3/13/19 8:16 AM, Steve Kargl wrote:
> >>> On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
>
> gcc8
Hi John,
On Wed, Mar 13, 2019 at 10:17 AM John Baldwin wrote:
> One issue I'm aware of is that clang does not have any support for the
> special arrangement FreeBSD/i386 uses where it uses different precision
> for registers vs in-memory for some of the floating point types (GCC has
> a special
On 3/13/19 9:40 AM, Steve Kargl wrote:
> On Wed, Mar 13, 2019 at 09:32:57AM -0700, John Baldwin wrote:
>> On 3/13/19 8:16 AM, Steve Kargl wrote:
>>> On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
gcc8 --version
gcc8 (FreeBSD Ports Collection) 8.3.0
gcc8
On Wed, Mar 13, 2019 at 09:32:57AM -0700, John Baldwin wrote:
> On 3/13/19 8:16 AM, Steve Kargl wrote:
> > On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
> >>
> >> gcc8 --version
> >> gcc8 (FreeBSD Ports Collection) 8.3.0
> >>
> >> gcc8 -fno-builtin -o z a.c -lm && ./z
> >> gcc8 -O
On 3/13/19 8:16 AM, Steve Kargl wrote:
> On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
>>
>> gcc8 --version
>> gcc8 (FreeBSD Ports Collection) 8.3.0
>>
>> gcc8 -fno-builtin -o z a.c -lm && ./z
>> gcc8 -O -fno-builtin -o z a.c -lm && ./z
>> gcc8 -O2 -fno-builtin -o z a.c -lm && ./z
On Wed, Mar 13, 2019 at 04:56:26PM +0100, Hans Petter Selasky wrote:
> On 3/13/19 4:50 PM, Steve Kargl wrote:
> > Using sin() and cos() directly as in
> >
> > /* Double precision csinh() without using C's double complex.s */
> > void
> > dp_csinh(double x, double y, double *re, double *im)
> > {
On 3/13/19 4:50 PM, Steve Kargl wrote:
Using sin() and cos() directly as in
/* Double precision csinh() without using C's double complex.s */
void
dp_csinh(double x, double y, double *re, double *im)
{
double c, s;
*re = sinh(x) * cos(y);
*im = cosh(x) * sin(y);
}
does not change
On Wed, Mar 13, 2019 at 04:41:51PM +0100, Hans Petter Selasky wrote:
> On 3/13/19 4:16 PM, Steve Kargl wrote:
> > On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
> >>
> >> gcc8 --version
> >> gcc8 (FreeBSD Ports Collection) 8.3.0
> >>
> >> gcc8 -fno-builtin -o z a.c -lm && ./z
> >>
On 3/13/19 4:16 PM, Steve Kargl wrote:
On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
gcc8 --version
gcc8 (FreeBSD Ports Collection) 8.3.0
gcc8 -fno-builtin -o z a.c -lm && ./z
gcc8 -O -fno-builtin -o z a.c -lm && ./z
gcc8 -O2 -fno-builtin -o z a.c -lm && ./z
gcc8 -O3
On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
>
> gcc8 --version
> gcc8 (FreeBSD Ports Collection) 8.3.0
>
> gcc8 -fno-builtin -o z a.c -lm && ./z
> gcc8 -O -fno-builtin -o z a.c -lm && ./z
> gcc8 -O2 -fno-builtin -o z a.c -lm && ./z
> gcc8 -O3 -fno-builtin -o z a.c -lm && ./z
>
On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
>
> cc -O -fno-builtin -o z a.c -lm && ./z
> cc -O2 -fno-builtin -o z a.c -lm && ./z
> cc -O3 -fno-builtin -o z a.c -lm && ./z
>
>
> Max ULP: 23.061242
> Count: 39 (# of ULP that exceeds 21)
>
These results do not change if
On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
> All,
>
> There seems to an optimization bug with clang on
>
> % uname -a
> FreeBSD mobile 13.0-CURRENT FreeBSD 13.0-CURRENT r344653 MOBILE i386
>
> IOW, if you do numerica work on i386, you may want to check your
> results.
>
>
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