frexp_sig of ±0, ±Inf, or NaN should just return the input unmodified.
frexp_exp of ±Inf or NaN is undefined, and frexp_exp of ±0 should return
the input unmodified. This seems to already work.
No shader-db or fossil-db changes on any Intel platform.
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Fixes: 23d30f4099 ("spirv,nir: lower frexp_exp/frexp_sig inside a new NIR pass")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13999>
This lowering isn't needed for RADV because AMDGCN has two
instructions. It will be disabled for RADV in an upcoming series.
While we are at it, factorize a little bit.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>