[U-Boot] Cannot compile arm u-boot with hardfloat toolchain

[Hans de Goede]

Hi,

On 05-01-15 13:24, B.R. Oake wrote:
> On 05/01/15 10:51, Hans de Goede wrote:
>> Ah, ok, thanks for figuring that out, so this only happens to people
>> following my sunxi-wip branch, because that commit is not upstream yet.
>>
>> So I guess I will need to fix this somehow without using 64 bit math,
>> any suggestions?
>
> EDID_DETAILED_TIMING_PIXEL_CLOCK() always returns a uint32 that is
> 10,000 times a uint16, so one way of avoiding 64-bit arithmetic would
> be to cancel out the 10,000 before the division:
>
> --- a/drivers/video/videomodes.c	2015-01-05 10:18:58.745985034 +0000
> +++ b/drivers/video/videomodes.c	2015-01-05 12:15:27.484150964 +0000
> @@ -411,7 +411,8 @@
>   	mode->refresh = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) /
>   			(h_total * v_total);
>
> -	mode->pixclock = 1000000000000LL / EDID_DETAILED_TIMING_PIXEL_CLOCK(*t);
> +	mode->pixclock = 100000000L /
> +                         (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 10000);
>   	mode->pixclock_khz = (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) + 500) /
>   				1000;
>
>
> I still wonder though whether a nicer way would be for the configs to be
> refactored so that -msoft-float was not set on platforms where it wasn't
> appropriate.

Ah I did not realize that the EDID_DETAILED_TIMING_PIXEL_CLOCK did * 10000,
that indeed makes things easier, I've done this instead (somewhat cleaner) :

-   mode->pixclock = 1000000000000LL / EDID_DETAILED_TIMING_PIXEL_CLOCK(*t);
-   mode->pixclock_khz = (EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) + 500) /
-                           1000;
+ mode->pixclock_khz = EDID_DETAILED_TIMING_PIXEL_CLOCK(*t) / 1000;
+ mode->pixclock = 1000000000L / mode->pixclock_khz;

I've squashed this fix into my personal tree, sunxi-wip branch, so people
building from there should not longer see those compile errors, and I'll
preserve the fix when the patches move to u-boot-sunxi/next :)

Regards,

Hans