Instead of trusting the caller to already have created a softfp64
function shader and added all its functions to our shader, we simply
take the softfp64 shader as an argument and do the function inlining
ouselves. This means that there's no more nasty functions lying around
that the caller needs to worry about cleaning up.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This pulls the guts of function inlining into a builder helper so that
it can be used elsewhere. The rest of the infrastructure is still
needed for most inlining cases to ensure that everything gets inlined
and only ever once. However, there are use-cases where you just want to
inline one little thing. This new helper also has a neat trick where it
can seamlessly inline a function from one nir_shader into another.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
The lowering we do for 64-bit instructions can cause a single NIR ALU
instruction to blow up into hundreds or thousands of instructions
potentially with control flow. If loop unrolling isn't aware of this,
it can unroll a loop 20 times which contains a nir_op_fsqrt which we
then lower to a full software implementation based on integer math.
Those 20 invocations suddenly get a lot more expensive than NIR loop
unrolling currently expects. By giving it an approximate estimate
function, we can prevent loop unrolling from going to town when it
shouldn't.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
We already have one internally for int64 but we don't have a similar one
for doubles so we'll have to make one.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This is set to True only for numeric conversion opcodes.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Not complete, mostly just adding things as I encounter them in CTS. But
not getting far enough yet to hit most of the OpenCL.std instructions.
Anyway, this is better than nothing and covers the most common builtins.
v2: add hadd proof from Jason
move some of the lowering into opt_algebraic and create new nir opcodes
simplify nextafter lowering
fix normalize lowering for inf
rework upsample to use nir_pack_bits
add missing files to build systems
v3: split lines of iadd/sub_sat expressions
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
v2: use formula with fewer operations
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
v2: add assert in else clause
make local group intrinsics 32 bit wide
v3: always use 32 bit constant for local_size
v4: add comment by Jason
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
we define it inside 'include/c99_math.h' so it is safe to use.
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Note that locations can be set in different units, and the multiplier
argument caters to supporting these different units. For example,
st_glsl_to_nir uses dwords (4 bytes) so the multiplier should be 4,
while tgsi_to_nir uses bytes, so the multiplier should be 16.
Signed-Off-By: Timur Kristóf <timur.kristof@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
The nir_lower_uniforms_to_ubo function is useful outside of
mesa/state_tracker, and in fact is needed to produce NIR for
drivers that have the PIPE_CAP_PACKED_UNIFORMS capability.
Signed-Off-By: Timur Kristóf <timur.kristof@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This lets us emit the VPM_WRITEs directly from
nir_intrinsic_store_output() (useful once NIR scheduling is in place so
that we can reduce register pressure), and lets future NIR scheduling
schedule the math to generate them. Even in the meantime, it looks like
this lets NIR DCE some more code and make better decisions.
total instructions in shared programs: 6429246 -> 6412976 (-0.25%)
total threads in shared programs: 153924 -> 153934 (<.01%)
total loops in shared programs: 486 -> 483 (-0.62%)
total uniforms in shared programs: 2385436 -> 2388195 (0.12%)
Acked-by: Ian Romanick <ian.d.romanick@intel.com> (nir)
We were printing only when the channel was exactly the start channel, so
scalarized loads/stores would be missing the name on the rest.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
We need more space than just a 32-bit scalar and we have to burn all
that space anyway so we may as well expose it to the driver. This also
fixes a subtle bug when UBOs and SSBOs have different pointer types.
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
When we have a larger sampler index, we get into the "high sampler"
scenario and need an instruction header. Even in SIMD8, this pushes the
instruction over the sampler message size maximum of 11 registers.
Instead, we have to lower TXD to TXL.
Fixes: cb98e0755f "intel/fs: Support min_lod parameters on texture..."
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Optimize a situation where we only need lower 32 bits from 64 bit
result.
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Suggested-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
On Gen 8 and 9, "mul" instruction supports 64 bit destination type. We
can reduce our 64x64 int multiplication from 4 instructions to 3.
Also instead of emitting two mul instructions, we can emit single mul
instuction and extract low/high 32 bits from 64 bit result for
[i/u]mulExtended
v2: 1) Allow lower_mul_high64 to use new opcode (Jason Ekstrand)
2) Add lower_mul_2x32_64 flag (Matt Turner)
3) Remove associative property as bit size is different (Connor
Abbott)
v3: Fix indentation and variable naming convention (Jason Ekstrand)
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This will allow the options to be visible under nir_shader->options,
which will allow the gallium state_tracker to use the driver preferred
settings during glsl_to_nir.
Suggested-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
I noticed this while looking at a shader that was affected by Tim's
"more loop unrolling" series.
In review, Tim Arceri asked:
> Why the hurt on Gen6+ is this something that should be in the late
> optimisations pass?
As far as I can tell, it's just because our scheduler is terrible. In
all the fragment shaders that I looked at (some hurt shaders were from
other stages), only one of the SIMD8 or SIMD16 version would be hurt.
In many of those case, the other SIMD width is improved (e.g.,
shaders/closed/steam/brutal-legend/3990.shader_test).
Often it looks like the scheduler decides to differently schedule a SEND
the occurs somewhere early in the shader. Once that happens, everything
is different.
I looked at one vertex shader that was hurt (from Goat Simulator). In
that case, both the floor and fract are used. The optimization
eliminates the add, and it should allow better scheduling. In the area
of the FRC and RNDD instructions, the scheduler does the right thing.
However, later in the shader a MAD and and ADD get scheduled
differently, and that makes it slightly worse.
In light of this, I tried adding some "is_used_once" mark-up, and that
did not fix all the cycles regressions. It also did a lot more harm
than good on SKL (helped 82 vs. hurt 241).
All Gen6+ platforms had similar results. (Skylake shown)
total instructions in shared programs: 15437001 -> 15435259 (-0.01%)
instructions in affected programs: 213651 -> 211909 (-0.82%)
helped: 988
HURT: 0
helped stats (abs) min: 1 max: 27 x̄: 1.76 x̃: 1
helped stats (rel) min: 0.15% max: 11.54% x̄: 1.14% x̃: 0.59%
95% mean confidence interval for instructions value: -1.89 -1.63
95% mean confidence interval for instructions %-change: -1.23% -1.05%
Instructions are helped.
total cycles in shared programs: 383007378 -> 382997063 (<.01%)
cycles in affected programs: 1650825 -> 1640510 (-0.62%)
helped: 679
HURT: 302
helped stats (abs) min: 1 max: 348 x̄: 23.39 x̃: 14
helped stats (rel) min: 0.04% max: 28.77% x̄: 1.61% x̃: 0.98%
HURT stats (abs) min: 1 max: 250 x̄: 18.43 x̃: 7
HURT stats (rel) min: 0.04% max: 25.86% x̄: 1.41% x̃: 0.53%
95% mean confidence interval for cycles value: -13.05 -7.98
95% mean confidence interval for cycles %-change: -0.86% -0.50%
Cycles are helped.
Iron Lake and GM45 had similar results. (GM45 shown)
total instructions in shared programs: 5043616 -> 5043010 (-0.01%)
instructions in affected programs: 119691 -> 119085 (-0.51%)
helped: 432
HURT: 0
helped stats (abs) min: 1 max: 27 x̄: 1.40 x̃: 1
helped stats (rel) min: 0.10% max: 8.11% x̄: 0.66% x̃: 0.39%
95% mean confidence interval for instructions value: -1.58 -1.23
95% mean confidence interval for instructions %-change: -0.72% -0.59%
Instructions are helped.
total cycles in shared programs: 128139812 -> 128135762 (<.01%)
cycles in affected programs: 3829724 -> 3825674 (-0.11%)
helped: 602
HURT: 0
helped stats (abs) min: 2 max: 486 x̄: 6.73 x̃: 6
helped stats (rel) min: 0.02% max: 4.85% x̄: 0.19% x̃: 0.10%
95% mean confidence interval for cycles value: -8.40 -5.05
95% mean confidence interval for cycles %-change: -0.22% -0.16%
Cycles are helped.
Reviewed-by: Elie Tournier <tournier.elie@gmail.com>
I have not investigated the result of doing this during code
generation. That should be possible, but it would be a bit more
effort.
All Gen6+ platforms had nearly identical results. (Skylake shown)
total cycles in shared programs: 370961508 -> 370961367 (<.01%)
cycles in affected programs: 5174 -> 5033 (-2.73%)
helped: 2
HURT: 0
Iron Lake and GM45 had similar results. (Iron Lake shown)
total instructions in shared programs: 8206587 -> 8206589 (<.01%)
instructions in affected programs: 1325 -> 1327 (0.15%)
helped: 0
HURT: 2
total cycles in shared programs: 187657422 -> 187657428 (<.01%)
cycles in affected programs: 11566 -> 11572 (0.05%)
helped: 0
HURT: 2
This change has almost no effect right now. However, removing this
patch (but leaving the patch "intel/fs: Generate if instructions with
inverted conditions") after adding a patch that removes !(a < b) -> (a
>= b) optimizations (like
https://patchwork.freedesktop.org/patch/264787/) has the following
results on Skylake:
Skylake
total instructions in shared programs: 15071804 -> 15071806 (<.01%)
instructions in affected programs: 640 -> 642 (0.31%)
helped: 0
HURT: 2
total cycles in shared programs: 369914348 -> 369916569 (<.01%)
cycles in affected programs: 27900 -> 30121 (7.96%)
helped: 4
HURT: 15
helped stats (abs) min: 2 max: 112 x̄: 30.00 x̃: 3
helped stats (rel) min: 0.28% max: 12.28% x̄: 3.34% x̃: 0.40%
HURT stats (abs) min: 2 max: 758 x̄: 156.07 x̃: 81
HURT stats (rel) min: 0.20% max: 74.30% x̄: 16.29% x̃: 16.91%
95% mean confidence interval for cycles value: 12.68 221.11
95% mean confidence interval for cycles %-change: 3.09% 21.23%
Cycles are HURT.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Differently than the direct case, the indirect array derefs of vector
are handled like regular derefs, with the exception that we ignore any
vector entry that has SSA values when performing a load. Such SSA
values don't help loading of the indirect unless we emit an if-ladder.
Copy_derefs are supported for indirects.
Also enable two tests that now pass.
v2: Remove unnecessary temporaries. Be clearer when identifying the
case where copy_entry doesn't help when we are dealing with an
indirect array_deref (of a vector). (Jason)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
When looking up an entry to use, always prefer an equal match, as it
more likely to contain reusable SSA or derefs to propagate.
This will be necessary when adding entries with array derefs of
vectors, because we don't want the vector if the equal entry (an array
deref of that vector) is present.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Both on an actual array and on a vector, and an extra test on a vector
mixing direct and indirect access. The vector tests are disabled and
will be enabled by a later commit.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
When direct array deref is used on a vector type (for loads and
stores), copy_prop_vars is now smart to propagate values it knows
about.
Given a 'vec4 v', storing to v[3] will update the copy entry for v and
it is equivalent to a write to v.w. Loading from v[1] will try first
to see if there's a known value for v.y -- and drop the load in that
case.
The copy entries still always refer to the entire vectors, so the
operations happen on the parent deref (the 'vector') and the values
are fixed accordingly.
It might be the case now that certain entries have not only different
SSA defs in each element but also those come from different components
than they are set to, because stores to individual elements always
come from a SSA definition with a single component.
Tests related to these cases are now enabled.
v2: Instead of asserting on invalid indices, "load" an undef and
remove the store. (Jason)
v3: Merge code path for the cases of is_array_deref_of_vector into the
regular code path. Add a base_index parameter to
value_set_from_value. (code changes by Jason)
v4: Removed the get_entry_for_deref helper, now being used only once.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Also replace uses of 0xf with the appropriate full mask created from
the number of components.
Note that an increase of MAX might make us change how the data is
stored later on, but for now at least we make sure the pass is not
hardcoded.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
The name reflected this function role back when the pass also did dead
write elimination. So rename it to what it does now, which is setting
a value using another value; and narrow the argument list.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This is useful for r600 since there the abs source modifier is not supported
for ops with three sources
v2: Use correct logic to enable lowering to abs source mod (Eric Anhold)
Signed-off-by: Gert Wollny <gw.fossdev@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
The memory layout associated with this format would be:
Byte: 0 1 2 3
Component: V U Y X
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Fixes following valgrind warning:
==27561== Conditional jump or move depends on uninitialised value(s)
==27561== at 0x667856B: value_set_ssa_components (nir_opt_copy_prop_vars.c:78)
==27561== by 0x667A1C4: copy_prop_vars_block (nir_opt_copy_prop_vars.c:797)
Fixes: 62332d139c "nir: Add a local variable-based copy propagation pass"
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
The nir_builder swizzling improvement to not emit extra MOVs resulted in
nir_lower_tex() trying to rewrite an SSA def to itself, triggering the
assert on all texturing in v3d. There's no work to be done in this case,
so just stop asserting.
Fixes: 743700be1f ("nir/builder: Don't emit no-op swizzles")
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This is a common pattern from HLSL->SPIRV translation
and supported in HW by all current NIR backends.
vkpipeline-db results anv (SKL):
total instructions in shared programs: 6403130 -> 6402380 (-0.01%)
instructions in affected programs: 204084 -> 203334 (-0.37%)
helped: 208
HURT: 0
total cycles in shared programs: 1915629582 -> 1918198408 (0.13%)
cycles in affected programs: 1158892682 -> 1161461508 (0.22%)
helped: 107
HURT: 86
shader-db results on i965 (KBL):
total instructions in shared programs: 15284592 -> 15284568 (<.01%)
instructions in affected programs: 81683 -> 81659 (-0.03%)
helped: 24
HURT: 0
total cycles in shared programs: 375013622 -> 375013932 (<.01%)
cycles in affected programs: 40169618 -> 40169928 (<.01%)
helped: 13
HURT: 9
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
SPIR-V shifts are undefined for values >= bitsize, but SM5 shifts
are defined to only use the least significant bits.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
The nir_swizzle helper is used some on it's own but it's also called by
nir_channel and nir_channels which are used everywhere. It's pretty
quick to check while we're walking the swizzle anyway whether or not
it's an identity swizzle. If it is, we now don't bother emitting the
instruction. Sure, copy-prop will clean it up for us but there's no
sense making more work for the optimizer than we have to.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Test using array deref on vectors in loads and stores. These are
marked DISABLED_ as this optimization is currently not done.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Replace find_next_intrinsic(intrinsic, after) with
get_intrinsic(intrinsic, index). This makes slightly more convenient
to check the resulting loads/stores/copies, since in most tests we
know which one we care about. The cost is to perform more traversals,
but for such tests this is not a problem.
Added the ASSERT_EQ() on count to some tests missing it, so the
indices queried are always expected to find something.
Also, drop two nir_print_shader leftover calls in a test.
v2: Remove redundant assertions. nir_src_comp_as_uint already
assert what we need. (Jason)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
When a copy_entry is SSA, store not only the nir_ssa_def* for each
component, but also the source component they come from. At the
moment this is always a match (i.e. 'component[i] == i'), because all
the operations for a copy_entry happen using definitions with the same
size. This prepares the code for array_derefs of vectors, in which
'component[i] != i'.
Also, extract setting all SSA components into a function of its own.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Disabled by default, to be used during development. Adding those
so I don't rewrite some ad-hoc version of them everytime I'm working
with this pass.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
For now these derefs are not handled, so don't let these get into the
copies list -- which would cause wrong propagations. For load_derefs,
do nothing. For store_derefs, invalidate whatever the store is
writing to. For copy_derefs, invalidate whatever the copy is writing
to.
These cases will happen once derefs to SSBOs/UBOs are kept around long
enough to get optimized by copy_prop_vars.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Rather than only lowering if all srcs are scalarizable we instead
check that at least one src is scalarizable.
We change undef type to return false otherwise it will cause
regressions when it is the only scalarizable src.
total instructions in shared programs: 13219105 -> 13024547 (-1.47%)
instructions in affected programs: 1153797 -> 959239 (-16.86%)
helped: 581
HURT: 74
total cycles in shared programs: 333968972 -> 324807922 (-2.74%)
cycles in affected programs: 129809402 -> 120648352 (-7.06%)
helped: 571
HURT: 131
total spills in shared programs: 57947 -> 29130 (-49.73%)
spills in affected programs: 53364 -> 24547 (-54.00%)
helped: 351
HURT: 0
total fills in shared programs: 51310 -> 25468 (-50.36%)
fills in affected programs: 44882 -> 19040 (-57.58%)
helped: 351
HURT: 0
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This reduces the time spent in nir_opt_cse() by almost a half.
The massif tool from callgrind reported no change in peak
memory use with the large doliphin uber shaders I used for
testing.
Reviewed-by: Thomas Helland<thomashelland90@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Copy+paste error. It was supposed to test cull and not clip.
Fixes: 4e69fba534 "nir: Rewrite lower_clip_cull_distance_arrays..."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109717
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
On GLSL that info is set as a layout qualifier when redeclaring
gl_FragCoord, so somehow tied to a specific variable. But in practice,
they behave as a global of the shader. On ARB programs they are set
using a global OPTION (defined at ARB_fragment_coord_conventions), and
on SPIR-V using ExecutionModes, that are also not tied specifically to
the builtin.
This patch moves that info from nir variable and ir variable to nir
shader and gl_program shader_info respectively, so the map is more
similar to SPIR-V, and ARB programs, instead of more similar to GLSL.
FWIW, shader_info.fs already had pixel_center_integer, so this change
also removes some redundancy. Also, as struct gl_program also includes
a shader_info, we removed gl_program::OriginUpperLeft and
PixelCenterInteger, as it would be superfluous.
This change was needed because recently spirv_to_nir changed the order
in which execution modes and variables are handled, so the variables
didn't get the correct values. Now the info is set on the shader
itself, and we don't need to go back to the builtin variable to set
it.
Fixes: e68871f6a ("spirv: Handle constants and types before execution
modes")
v2: (Jason)
* glsl_to_nir: get the info before glsl_to_nir, while all the rest
of the info gathering is happening
* prog_to_nir: gather the info on a general info-gathering pass,
not on variable setup.
v3: (Jason)
* Squash with the patch that removes that info from ir variable
* anv: assert that OriginUpperLeft is true. It should be already
set by spirv_to_nir.
* blorp: set origin_upper_left on its core "compile fragment
shader", not just on some specific places (for this we added an
helper on a previous patch).
* prog_to_nir: no need to gather specifically this fragcoord modes
as the full gl_program shader_info is copied.
* spirv_to_nir: assert that we are a fragment shader when handling
this execution modes.
v4: (reported by failing gitlab pipeline #18750)
* state_tracker: update too due changes on ir.h/gl_program
v5:
* blorp: minor change after change on previous patch
* radeonsi: update due this change.
v6: (Timothy Arceri)
* prog_to_nir: remove extra whitespace
* shader_info: don't use :1 on origin_upper_left
* glsl: program.fs.origin_upper_left/pixel_center_integer can be
move out of the shader list loop
