These patterns need is_only_used_as_float because fmin/fmax might change NaN
patterns, while bcsel is bit exact. For the same reason, the replacement
must not add undefined results, so make the replacement NaN/inf preserving.
It's impossible to make them signed zero correct (-0.0 == +0.0),
so it's also important that the user alu doesn't care.
Otherwise, the only thing that matters is is whether a is NaN.
Foz-DB Navi48:
Totals from 453 (0.55% of 82405) affected shaders:
MaxWaves: 8242 -> 8270 (+0.34%)
Instrs: 2382059 -> 2380094 (-0.08%); split: -0.09%, +0.00%
CodeSize: 13197208 -> 13179488 (-0.13%); split: -0.14%, +0.00%
VGPRs: 44688 -> 44604 (-0.19%)
Latency: 22839894 -> 22838985 (-0.00%); split: -0.01%, +0.00%
InvThroughput: 4873352 -> 4872924 (-0.01%)
VClause: 50862 -> 50883 (+0.04%); split: -0.02%, +0.06%
SClause: 54000 -> 53993 (-0.01%)
Copies: 250215 -> 250233 (+0.01%); split: -0.00%, +0.01%
PreVGPRs: 39694 -> 39620 (-0.19%)
VALU: 1116881 -> 1116073 (-0.07%); split: -0.07%, +0.00%
SALU: 492799 -> 492139 (-0.13%); split: -0.14%, +0.00%
VOPD: 85457 -> 85461 (+0.00%)
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39641>
Unifies nir per instruction float control.
In the future this can be split into contract/reassoc/transform
like SPIR-V.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com> (except SPIR-V)
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39103>
We don't need one bit per bitsize per instruction if only one actually
matters in the end.
First step towards moving NIR in the direction of full float_controls2
only.
Also rename this from fp_fast_math, because that name implied that 0 is
the no fast math mode, while the opposite was the case.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39026>
This implements IEEE-754-2019 signed zero semantics for fmin/fmax, as now
required by NIR, for hardware that has busted signed zero behaviour for
fmin/fmax. Ian expressed interest in this for Intel.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30075>
With float_controls2, shaders can decide on the behavior of
NaN/Inf/SignedZero preservation by decorating specific instructions, on
top of having a default for the whole program.
Add where to track these to nir_alu_instr and propagate them to new
instructions everywhere that exact is being done already.
v2: use less bits for fp_fast_math in nir_alu_instr (Alyssa)
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27281>
Instead, we replace it directly with nir_def. We could replace it with
nir_dest but the next commit gets rid of that so this avoids unnecessary
churn. Most of this commit was generated by sed:
sed -i -e 's/dest.dest.ssa/def/g' src/**/*.h src/**/*.c src/**/*.cpp
There were a few manual fixups required in the nir_legacy.c and
nir_from_ssa.c as nir_legacy_reg and nir_parallel_copy_entry both have a
similar pattern.
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24674>
In a future commit, nit_type_conversion_op won't be able to handle i2b
(and in a much later commit f2b), so switch many users to the fully
featured function.
No shader-db or fossil-db changes on any Intel platform.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15121>
Changes:
- nir_metadata_preserve(..., nir_metadata_all) is called when pass doesn't
make progress
- only metadata of the current function is invalidated (invalidation on
one function was leaking to successive functions because "progress"
was not reset)
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12282>
uadd_carry returns 1 or 0, so ANDing with 1 is unnecessary. Probably
this was implemented thinking that it was returning a boolean value.
shader-db results for V3D:
total instructions in shared programs: 12463571 -> 12462964 (<.01%)
instructions in affected programs: 28994 -> 28387 (-2.09%)
helped: 110
HURT: 1
total uniforms in shared programs: 3704591 -> 3704588 (<.01%)
uniforms in affected programs: 247 -> 244 (-1.21%)
helped: 3
HURT: 0
total max-temps in shared programs: 2148138 -> 2148117 (<.01%)
max-temps in affected programs: 729 -> 708 (-2.88%)
helped: 23
HURT: 2
total sfu-stalls in shared programs: 21230 -> 21232 (<.01%)
sfu-stalls in affected programs: 0 -> 2
helped: 0
HURT: 2
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17903>
This commit replaces the new_src parameter of nir_ssa_def_rewrite_uses()
with an SSA def, removes nir_ssa_def_rewrite_uses_ssa(), and rewrites
all the users as needed.
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Acked-by: Alyssa Rosenzweig <alyssa@collabora.com>
Acked-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9383>
This is basically the same as the GLSL lowering path.
v2: Fix typo in the link
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This is basically the same as the GLSL lowering path.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This is based on the glsl/lower_instructions.cpp implementation, but
should be much more readable.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
