On Fri, 2019-02-08 at 10:42 +0100, Uros Bizjak wrote:
> so, the reverted patch neglected this assumption. Ignoring this, we
> can use
>
> --cut here--
> Index: libgfortran/config/fpu-glibc.h
> ===================================================================
> --- libgfortran/config/fpu-glibc.h (revision 268424)
> +++ libgfortran/config/fpu-glibc.h (working copy)
> @@ -129,6 +129,10 @@
> int
> support_fpu_trap (int flag)
> {
> +#if defined(__arm__) || defined(__aarch64__)
> + return 0;
> +#endif
> +
> return support_fpu_flag (flag);
> }
>
> --cut here--
>
> which would in effect revert to the previous status on arm/aarch64
> targets, while using correct setting for other targets, where
> exception support is assumed.
>
> Uros.
I am not sure we want to disable this for all arm/Aarch64 chips.
ieee_6.f90 is failing on my T88 ThunderX box with a 4.13 kernel and
passing on my T99 Thunderx2 box with a 4.15 kernel. I don't know
if it is the hardware or the kernel that is making the difference,
I am still trying to figure that out. I guess returning zero would be
a 'safe' choice in that it would say we do not support this on some
machines where it actually is supported but it would no longer claim
support on a machine where it is not supported.
Steve Ellcey
[email protected]
