Strange verticle lines on decoded image

Hi,

When using the ARCH_IS_GENERIC build options on an ARM processor, I am
noticing vertical lines on the decoded image. They are quite faint and
are noticeable on large areas of a solid colour.

I think I have narrowed the problem down to the RGB555 or RGB565 colour
space conversion routines, as when I replace it with my own optimised
version, the problems seems to disappear.

Anybody else experienced this?

Thanks,
Anand

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