Folding signed or unsigned i32 -> i16 conversion into sampling
instruction causes it to behave differently with out-of-bounds
values. The conversion expects higher bits being masked, however
folded variant does clamp the value.
A concrete example is that:
isaml.base0 (u16)(x)hr0.x
is not equal this:
isaml.base0 (u32)(x)r0.w
(sy)cov.u32u16 hr0.x, r0.w
Fixes misrendering in "Injustice 2".
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7869
Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20396>
4890745b19