[Mesa-dev] [PATCH] i965/vec4: copy abs/negate modifiers on src/dst_reg conversion constructors

[Matt Turner]

On Wed, Sep 30, 2015 at 10:38 AM, Jason Ekstrand <jason at jlekstrand.net> wrote:
> I'm not sure if this makes sense.  I can see how it would be useful
> (less information lost when going src_reg -> dst_reg -> src_reg).
> However, it seems wrong to me to assume that dst_reg.abs or
> dst_reg.negate means anything useful.  Matt?

Indeed. Without some more explanation, this does seem odd. Perhaps
Alejandro could tell us about a case this is useful.