NIR now fully contains pipe_stream_output_info in shader_info and IO
intrinsics if lower_io_variables is true. radeonsi will not use
pipe_stream_output_info after this, and other drivers are free to follow
that.
Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14388>
Task shader outputs work differently than other shaders, so they
need special consideration. Essentially, they have two kinds of
outputs:
1. Number of mesh shader workgroups to launch.
Will be still represented by a shader output.
2. Optional payload of up to (at least) 16K bytes.
These payload variables behave similarly to shared memory, but
the spec doesn't actually define them as shared memory (also, they
may be implemented differently by each backend), so we need to add
a new NIR variable mode for them.
These payload variables can't be represented by shader outputs
because the 16K bytes don't fit the 32x vec4 model that NIR uses
for its output variables.
This patch adds a new NIR variable mode: nir_var_mem_task_payload
and corresponding explicit I/O intrinsics, as well as support for
this new mode in nir_lower_io.
Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14930>
Move all the NIR related debug environmental variables in a single
NIR_DEBUG one.
Use NIR_DEBUG=help to print all the available options.
v2:
- Use a macro to simplify (Marcin, Jason)
- Remove wrong changes (Marcin)
v3 (Marcin):
- Remove rendundant NIR mentioning in option descriptions.
- Unwrap option descriptions.
- Ensure the constant is unsigned.
- Use extern array to remove switch.
v4:
- Add missing kernel shader (Jason).
- Add unlikely() (Marcin).
Signed-off-by: Juan A. Suarez Romero <jasuarez@igalia.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13840>
Most modern hardware needs the edge flag added as a hidden vertex input
and needs code added to the vertex shader to copy the input to an
output. Intel hardware is a little different. Gfx4 and Gfx5 hardware
works in the previously described mannter. Gfx6+ hardware needs the
edge flag as a specific vertex shader input, and that input is magically
processed by fixed-function hardware without need for extra shader code.
This flag signals only that the vertex shader input is needed. It would
be nice if we could decouple adding the vertex shader input from
generating the copy-to-output code, but that has proven to be
challenging. Not having that code causes other passes to want to
eliminate that shader input.
v2: Convert conditional to assertion. This pass is only called for
vertex shaders. Suggested by Ken.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12858>
Per-primitive is similar to per-vertex attributes, but applies to all
fragments of the primitive without any interpolation involved.
Because they are regular input and outputs, keep track in shader_info
of which I/O is per-primitive so we can distinguish them after deref
lowering. These fields can be used combined with the regular
`inputs_read`, `outputs_written` and `outputs_read`.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10600>
There's no SPIR-V Capability associated, so check in the Execution
Mode. For now, don't keep track of whether a shader uses uniform
control flow in the shader_info, we can add that when/if a driver
actually need that information.
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11476>
Move it out of the "cs" sub-struct, since the bit can be used for
other shader stages in the future.
This also removes a subtle issue in spirv_to_nir:
info.cs.shared_memory_explicit_layout was used without checking for
the CS shader stage. It ended up being "harmless" since the effects
also depended on presence of shared variables.
Fixes: 5de6c5973a ("spirv: Implement SPV_KHR_workgroup_memory_explicit_layout")
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10529>
This allows mediump inputs and outputs to be trivially lowered into packed
16-bit varyings where 1 slot is occupied by 2 16-bit vec4s, without any
packing instructions in NIR and without any conflicts with 32-bit varyings.
The only thing that is changed is IO semantics in intrinsics to get packed
16-bit varyings.
This simplifies supporting 16-bit types for drivers that have 32-bit slots
everywhere except the fragment shader where they can do 16-bit interpolation
on either the low or high half of each slot.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9050>
[airlied: rebase fixup types]
v2: add support for storing strings in a sideband storage,
just store the index in print buffer.
v3: move the format strings into the nir shader as well
v4: simplify the write constant string + explicit sizes
move printf cap definition.
v5: just parse the format string to find string specifiers
using util code.
add vtn_fail_if if we can't get the correct type.
v6: use ralloc + avoid instr handler for srcs > 5
v7: use a packed struct 4 bytes align all of it
v8: simplify constant copy
v9: rework to use a single string and common string
extract code, (Jason)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8254>
This introduces a new flag in shader_info to know if a fragment
shader uses sample shading, even if there is no inputs.
During NIR linking, constants varyings are optimized and the
per-sample interpolation info (ie. the sample qualifier) might
be removed if nir_shader_gather_info() is called again.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7876>
