54fa55a3f7
According to tests on hawaii, v_mqsad_u32_u8 always uses saturating accumulation
while v_msad_u8 truncates. GFX8+ can control this with the VOP3 clamp bit,
on older hardware that's not supported.
We want truncation for the NIR opcode.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12062
Fixes: c3c138b10f ("radv: optimize msad_4x8 to mqsad_4x8")
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31809>
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