That's an attempt at replacing the complex __int64_to_float() and
__float_to_int64() implementations found in float64.glsl by a simpler
native NIR equivalent.
Thanks to that, we can have lower those conversion without having to
compile a GLSL shader, which would be quite annoying for OpenCL
kernels.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5588>
Instead of having separate lists of variables, roughly sorted by mode,
use a single list for all shader-level NIR variables. This makes a few
list walks a bit longer here and there but list walks aren't a very
common thing in NIR at all. On the other hand, it makes a lot of things
like validation, printing, etc. way simpler. Also, there are a number
of cases where we move variables from inputs/outputs to globals and this
makes it way easier because we no longer have to move them between
lists. We only have to deal with that if moving them from the shader to
a nir_function_impl.
Reviewed-by: Rob Clark <robdclark@chromium.org>
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5966>
We also add a new list iterator which takes a modes bitfield and
automatically figures out which list to use. In the future, this
iterator will work for multiple modes but today it assumes a single mode
thanks to the behavior of nir_variable_list_for_mode. This also doesn't
work for function_temp variables.
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5966>
For the most part, this doesn't actually matter today. We already only
call remove_dead_vars on the lists that are specified in the modes. The
only functional change here is for the uniform, mem_ubo, and mem_ssbo
modes because they share a list. If nir_remove_dead_variables is called
with a mode of nir_var_uniform, it will no longer remove UBOs or SSBOs,
for instance.
Reviewed-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5966>
For convenience in e68871f6a4 ("spirv: Handle constants and types
before execution modes") we moved all execution mode parsing after the
constants and types, so that those using OpExecutionModeId could be
handled together.
Later in 84781e1f1d ("spirv/nir: keep track of SPV_KHR_float_controls
execution modes") we had to parse certain non-ID execution modes
before handling constants.
Instead of handling just the float controls related execution modes
early, handle all modes that don't need an ID. This is a more
"natural" split and will allow other type handling to rely on
execution mode in the future.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6062>
Vulkan allows fragment shaders to read gl_ClipDistance[], in which
case the SPIR-V compiler inserts a single compact array variable for
VARYING_SLOW_CLIP_DIST0 and the lowering should not try to inject
its own variables, but instead work in terms of the existing one.
Vulkan drivers are expected to call this with use_clipdist_array set
to true to be consistent with this setup.
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6022>
I missed this if statement so atomic counters weren't getting bindings
and, when you have more than one of them, that meant they were all
getting combined into one.
Fixes: 3584cb09bc15 "spirv: Give atomic counters their own variable mode"
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6060>
The current scheduling algorithm favors parallelism a bit too
aggressively and sometimes generates shaders that fail register
allocation. This happens even if the threshold is set to zero to force
it to always use the CSR instruction choosing algorithm.
This patch adds an option to use an even more aggressive fallback that
just always picks the instruction with the shortest maximum delay in the
hope that that will generate the least register pressure. The intention
is to use this as a last resort after register allocation fails in order
to at least have a working shader.
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Acked-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5953>
Adds a callback function to nir_schedule_options to give the backend a
chance to add custom dependencies between certain intrinsics. The
callback can assign a class number to the intrinsic and then set a read
or write dependency on that class.
v2: Use a linked-list of schedule nodes for the dependency classes
instead of a fixed-sized array.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5953>
nir_schedule already has a struct for options which makes it more than
just a function declaration. Later patches intend to add more structs to
complement these options. In order to make the code easier to manage,
this moves the nir_scheduler-related parts out of nir.h to their own
header.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5953>
Previously, objects of type OpTypeImage or OpTypeSampler were treated as
vtn_pointers and objects of type OpTypeSampledImage were a special-use
vtn_sampled_image struct. This commit changes that so that all of those
objects are stored in vtn_ssa_values. Each of images, samplers, and
sampled images, are stored as a scalar or vector nir_ssa_def whose
components are NIR deref values. We now use vtn_type_get_nir_type to
re-resolve those as-needed into GLSL sampler types for NIR.
This simplification has a number of benefits:
1. We can git rid of the rest of our special-cases for handling images
and samplers in function arguments. Now that they're treated as
structs at the glsl_type level, the generic paths can handle images
and samplers.
2. We can now construct composite values containing images and samplers
internally. It's unclear from the SPIR-V spec whether or not this
is allowed and it's not a pattern that GLSLang currently generates
thanks to GLSL rules. However, if we do start seeing SPIR-V that
contains such composites, we should now be able to handle it.
3. SPIR-V OpNull and OpUndef instructions can now create samplers,
images, and sampled images. The NIR generated won't likely be fully
valid but, given a NIR pass to do something sensible, it should be a
thing we can compile.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5278>
There are a few cases, atomic counters being one example, where the type
used by vtn_ssa_value is not the same as the type we want NIR to use in
derefs and variables. To solve this, we add a helper which converts
between the types for us. In the next commit, we'll be adding another
major user of this: images and samplers.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5278>
