Marek Olšák [Thu, 20 Jun 2019 22:24:19 +0000 (18:24 -0400)]
gallium/u_blitter: implement copying from ZS to color and vice versa
This is for drivers that can't map depth and stencil and need to blit
them to a color texture for CPU access.
This also useful for drivers using separate depth and stencil.
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Marek Olšák [Thu, 20 Jun 2019 23:52:23 +0000 (19:52 -0400)]
gallium/util: rewrite depth-stencil blit shaders
- merge all 3 functions (Z, S, ZS)
- don't write the color output
- read the value from texel.x, then write it to position.z or stencil.y
(don't use the value from texel.y or texel.z)
Tested-by: Dieter Nützel <Dieter@nuetzel-hh.de>
Marek Olšák [Sat, 15 Jun 2019 04:09:56 +0000 (00:09 -0400)]
st/mesa: accelerate glCopyPixels(STENCIL)
Tested-by: Dieter Nützel
Yevhenii Kolesnikov [Wed, 20 Feb 2019 13:42:27 +0000 (15:42 +0200)]
glsl/standalone: meson test for --dump-builder
Added meson test for standalone compiler with --dump-builder option
on builtin texture* functions.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107767
Signed-off-by: Yevhenii Kolesnikov <yevhenii.kolesnikov@globallogic.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Sergii Romantsov [Thu, 30 Aug 2018 12:04:35 +0000 (15:04 +0300)]
glsl/standalone: exit on unsupported texture functions
glsl/standalone with --dump-builder will exit when unsupported texture
functions are encountered.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107767
Signed-off-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
Signed-off-by: Yevhenii Kolesnikov <yevhenii.kolesnikov@globallogic.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Pierre-Eric Pelloux-Prayer [Wed, 3 Jul 2019 17:27:12 +0000 (19:27 +0200)]
radeonsi: make gl_SampleMaskIn = 0x1 when MSAA is disabled
gl_SampleMaskIn is 1 when R_028BE0_PA_SC_AA_CONFIG is 0, so this commit rework the conditions
controlling this register.
Before it was set if the sctx->framebuffer had a sample count > 1.
Now we still require this condition, but we also need either:
- GL_MULTISAMPLE to be enabled
- to be executing an operation that doesn't depends on GL state using u_blitter.
This fixes the arb_sample_shading/sample_mask piglit tests on radeonsi.
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Brian Paul [Thu, 7 Dec 2017 16:09:13 +0000 (09:09 -0700)]
gallium/u_blitter: enable MSAA when blitting to MSAA surfaces
If we're doing a Z -> Z MSAA blit (for example) we need to enable
msaa rasterization when drawing the quads so that we can properly
write the per-sample values.
This fixes a number of Piglit ext_framebuffer_multisample blit tests
such as ext_framebuffer_multisample/no-color 2 depth combined with
the VMware driver.
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Alexandros Frantzis [Fri, 21 Jun 2019 22:18:27 +0000 (01:18 +0300)]
virgl: Clear the valid buffer range when possible
If we are discarding the whole resource, we don't care about previous contents,
and the resource storage is now unused, either because we have created new
resource storage, or because we have waited for the existing resource storage
to become unused, or because the transfer is unsynchronized.
In the last two cases this commit marks the storage as uninitialized, but only
if the resource is not host writable (in which case we can't clear the valid
range, since that would result in missed readbacks in future transfers).
In the first case, when the whole resource discard involves a reallocation, the
reallocation and subsequent rebinding already update the valid buffer range
appropriately.
Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Jan Zielinski [Tue, 2 Jul 2019 14:44:34 +0000 (16:44 +0200)]
swr/swr: Enable ARB_viewport_array
The rasterizer core supported ARB_viewport_array,
but the swr layer connecting core to Gallium state
tracker only allowed one viewport.
We add support for multiple viewports to swr layer.
Reviewed-by: Alok Hota <alok.hota@intel.com>
Bas Nieuwenhuizen [Wed, 3 Jul 2019 00:25:19 +0000 (02:25 +0200)]
radv: Support VK_EXT_queue_family_foreign.
Basically same as external for now.
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Only case we might need to handle differently in the near future
is Raven's case of displayable DCC which is not renderable. But
we don't support that yet.
Bas Nieuwenhuizen [Tue, 2 Jul 2019 09:32:44 +0000 (11:32 +0200)]
radv: Fix interactions between variable descriptor count and inline uniform blocks.
Fixes: d7e6541cc72 "radv: Only allocate supplied number of descriptors when variable."
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Michel Dänzer [Fri, 28 Jun 2019 16:35:56 +0000 (18:35 +0200)]
winsys/amdgpu: Make KMS handles valid for original DRM file descriptor
Getting a DMA-buf fd and converting that to a handle using our duplicate
of that file descriptor (getting at which requires passing a
radeon_winsys pointer to the buffer_get_handle hook) makes sure of this,
since duplicated file descriptors reference the same file description
and therefore the same GEM handle namespace.
This is necessary because libdrm_amdgpu may use a different DRM file
descriptor with a separate handle namespace internally, e.g. because it
always reuses any existing amdgpu_device_handle for the same device.
amdgpu_bo_export returns a handle which is valid for that internal
file descriptor.
Bugzilla: https://bugs.freedesktop.org/110903
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Michel Dänzer [Fri, 28 Jun 2019 14:06:23 +0000 (16:06 +0200)]
winsys/amdgpu: Add amdgpu_screen_winsys
It extends pipe_screen / radeon_winsys and references amdgpu_winsys.
Multiple amdgpu_screen_winsys instances may reference the same
amdgpu_winsys instance, which corresponds to an amdgpu_device_handle.
The purpose of amdgpu_screen_winsys is to keep a duplicate of the DRM
file descriptor passed to amdgpu_winsys_create, which will be needed
in the next change.
v2:
* Add comment in amdgpu_winsys_unref explaining why it always returns
true (Marek Olšák)
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Michel Dänzer [Mon, 1 Jul 2019 07:20:11 +0000 (09:20 +0200)]
winsys/amdgpu: Use amdgpu_winsys helper instead of open-coded casts
Cleanup to prevent breakage with the next change, no functional change
intended in this one.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tested-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Juan A. Suarez Romero [Tue, 2 Jul 2019 17:36:56 +0000 (19:36 +0200)]
intel: fix wrong format usage
Do not use the view format when filling the surface state.
Fixes dEQP-VK.image.texel_view_compatible.compute.extended.texture.*
Fixes: fb1350c76f1 ("intel: Add and use helpers for level0 extent")
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Samuel Pitoiset [Tue, 2 Jul 2019 12:50:28 +0000 (14:50 +0200)]
radv: only allocate a 32-bit value for the TC-compat range metadata
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Tue, 2 Jul 2019 12:50:27 +0000 (14:50 +0200)]
radv: remove unused code in radv_update_tc_compat_zrange_metadata()
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Tue, 2 Jul 2019 12:50:24 +0000 (14:50 +0200)]
radv: add radv_get_depth_pipeline() helper
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Mike Blumenkrantz [Wed, 29 May 2019 20:27:39 +0000 (16:27 -0400)]
iris: assert isl_surf_init success in resource_from_handle
this can fail unexpectedly due to bugs, so it's good to provide feedback
when this occurs
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Jason Ekstrand [Thu, 6 Jun 2019 20:45:57 +0000 (15:45 -0500)]
anv: Advertise a more accurate minTexelBufferOffsetAlignment
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Jason Ekstrand [Thu, 6 Jun 2019 20:31:17 +0000 (15:31 -0500)]
anv: Implement VK_EXT_texel_buffer_alignment
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Jason Ekstrand [Thu, 6 Jun 2019 20:22:02 +0000 (15:22 -0500)]
vulkan: Update the XML and headers to 1.1.113
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Caio Marcelo de Oliveira Filho [Mon, 1 Jul 2019 23:06:13 +0000 (16:06 -0700)]
spirv: Ignore ArrayStride in OpPtrAccessChain for Workgroup
From OpPtrAccessChain description in the SPIR-V spec (1.4 rev 1):
For objects in the Uniform, StorageBuffer, or PushConstant storage
classes, the element’s address or location is calculated using a
stride, which will be the Base-type’s Array Stride when the Base
type is decorated with ArrayStride. For all other objects, the
implementation will calculate the element’s address or location.
For non-CL shaders the driver should layout the Workgroup storage
class, so override any explicitly set ArrayStride in the shader. This
currently fixes only the lower_workgroup_access_to_offsets case, which
is used by anv.
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Karol Herbst [Mon, 1 Jul 2019 10:17:39 +0000 (12:17 +0200)]
nouveau: handle new CAPS
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Jason Ekstrand [Thu, 11 Apr 2019 19:57:12 +0000 (14:57 -0500)]
intel/fs: Use nir_lower_interpolation on gen11+
On gen11, the removed the PLN instruction so we have to emit a pile of
MAD to emulate it. We may as well do that in NIR so we can optimize and
later schedule it.
Shader-db results on Ice Lake:
total instructions in shared programs:
17145644 ->
16556440 (-3.44%)
instructions in affected programs:
11507454 ->
10918250 (-5.12%)
helped: 35763
HURT: 42085
helped stats (abs) min: 1 max: 140 x̄: 19.09 x̃: 18
helped stats (rel) min: 0.04% max: 37.93% x̄: 15.40% x̃: 14.49%
HURT stats (abs) min: 1 max: 248 x̄: 2.22 x̃: 2
HURT stats (rel) min: 0.05% max: 50.00% x̄: 5.00% x̃: 2.47%
95% mean confidence interval for instructions value: -7.67 -7.47
95% mean confidence interval for instructions %-change: -4.46% -4.29%
Instructions are helped.
total loops in shared programs: 4370 -> 4370 (0.00%)
loops in affected programs: 0 -> 0
helped: 0
HURT: 0
total cycles in shared programs:
360624645 ->
368220857 (2.11%)
cycles in affected programs:
269631244 ->
277227456 (2.82%)
helped: 15583
HURT: 65874
helped stats (abs) min: 1 max: 28561 x̄: 78.45 x̃: 32
helped stats (rel) min: <.01% max: 67.81% x̄: 5.38% x̃: 2.44%
HURT stats (abs) min: 1 max: 238638 x̄: 133.87 x̃: 20
HURT stats (rel) min: <.01% max: 306.25% x̄: 5.81% x̃: 3.97%
95% mean confidence interval for cycles value: 67.42 119.09
95% mean confidence interval for cycles %-change: 3.61% 3.73%
Cycles are HURT.
total spills in shared programs: 8943 -> 8981 (0.42%)
spills in affected programs: 1925 -> 1963 (1.97%)
helped: 44
HURT: 14
total fills in shared programs: 21815 -> 21925 (0.50%)
fills in affected programs: 3511 -> 3621 (3.13%)
helped: 41
HURT: 18
LOST: 70
GAINED: 14
Reviewed-by: Matt Turner <mattst88@gmail.com>
Jason Ekstrand [Thu, 11 Apr 2019 19:55:40 +0000 (14:55 -0500)]
intel/fs: Implement nir_intrinsic_load_fs_input_interp_deltas
Reviewed-by: Matt Turner <mattst88@gmail.com>
Jason Ekstrand [Thu, 11 Apr 2019 19:12:58 +0000 (14:12 -0500)]
intel/fs: Actually implement the load_barycentric intrinsics
If they never get used, dead code should clean them up. Also, we rework
the at_offset and at_sample intrinsics so they return a proper vec2
instead of returning things in PLN layout. Fortunately, copy-prop is
pretty good at cleaning this up and it doesn't result in any actual
extra MOVs.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Rob Clark [Wed, 3 Apr 2019 23:29:36 +0000 (19:29 -0400)]
nir: add pass to lower load_interpolated_input
Signed-off-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Boris Brezillon [Tue, 2 Jul 2019 12:26:02 +0000 (14:26 +0200)]
panfrost: Pass referenced BOs to the SUBMIT ioctls
Instead of manually adding the BOs from the various SLAB pools plus
the one backing the color FB, we insert them in the BO set attached
to the job and let panfrost_drm_submit_job() pass all BOs from this set
to the SUBMIT ioctl.
This means we are now passing all referenced BOs and let the scheduler
wait on referenced BO fences if needed.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 11:50:44 +0000 (13:50 +0200)]
panfrost: Make SLAB pool creation rely on BO helpers
There's no point duplicating the code, and it will help us simplify
the bo_handles[] filling logic in panfrost_drm_submit_job().
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 11:21:55 +0000 (13:21 +0200)]
panfrost: Add the panfrost_drm_{create,release}_bo() helpers
To avoid the panfrost_memory <-> panfrost_bo dance done in
panfrost_resource_create_bo() and panfrost_bo_unreference().
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 11:15:58 +0000 (13:15 +0200)]
panfrost: Move the mmap BO logic out of panfrost_drm_import_bo()
So we can re-use it for the panfrost_drm_create_bo() function we are
about to introduce.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 10:53:17 +0000 (12:53 +0200)]
panfrost: Avoid passing winsys handles to import/export BO funcs
Let's keep a clear split between ioctl wrappers and the rest of the
driver. All the import BO function need is a dmabuf FD and the screen
object, and the export one should only take care of generating a dmabuf
FD out of a BO object. Winsys handle manipulation should stay in the
resource.c file.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 09:37:40 +0000 (11:37 +0200)]
panfrost: Move BO meta-data out of panfrost_bo
That's what most (all?) implementation seem to do, and my understanding
is that a BO is just a bunch of memory that can be used for anything GPU
related, not only texture/FB resources.
Let's move those meta data in panfrost_resource so we can use
panfrost_bo for all kind of memory allocation and make BO allocation
more consistent.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 12:20:07 +0000 (14:20 +0200)]
panfrost: Stop exposing internal panfrost_drm_*() functions
panfrost_drm_submit_job() and panfrost_fence_create() are not used
outside of pan_drm.c.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 08:30:45 +0000 (10:30 +0200)]
panfrost: Get rid of the "free imported BO" logic
bo->imported was never set to true which means this path was never taken.
Moreover, panfrost_drm_free_imported_bo() is doing missing the munmap()
call which seems wrong because the import BO function calls mmap().
Let's just kill this function along with the ->imported field.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 08:25:26 +0000 (10:25 +0200)]
panfrost: Get rid of the panfrost_driver abstraction leftovers
Commit
5f81669d880b ("panfrost: Remove the panfrost_driver abstraction")
left a few things behind, remove them now.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Tue, 2 Jul 2019 08:12:10 +0000 (10:12 +0200)]
panfrost: Move scanout res creation out of panfrost_resource_create()
Which improves readability and help us avoid a memory leak.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Boris Brezillon [Mon, 1 Jul 2019 15:22:26 +0000 (17:22 +0200)]
panfrost: Add the sampled texture BO to the job
Otherwise we get random use-after-{free,unmap} errors.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
---
Changes in v2:
- Move the panfrost_job_add_bo() call out of the loop
Samuel Pitoiset [Mon, 1 Jul 2019 14:31:01 +0000 (16:31 +0200)]
radv: enable DCC for layers on GFX8
It's currently only enabled if dcc_slice_size is equal to
dcc_slice_fast_clear_size because the driver assumes that
portions of multiple layers are contiguous but it's not
always true.
Still not supported on GFX9.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:31:00 +0000 (16:31 +0200)]
radv: do not enable DCC for mipmapped arrays because performance is worse
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:30:59 +0000 (16:30 +0200)]
radv: implement clearing DCC layers on GFX8
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:30:58 +0000 (16:30 +0200)]
radv: merge radv_dcc_clear_level() into radv_clear_dcc()
This will help for clearing DCC arrays because we need to know
the subresource range.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:30:57 +0000 (16:30 +0200)]
radv: add support for decompressing DCC layers with compute
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:30:56 +0000 (16:30 +0200)]
ac: compute the DCC fast clear size per slice on GFX8
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Mon, 1 Jul 2019 14:30:55 +0000 (16:30 +0200)]
ac: compute the size of one DCC slice on GFX8
Addrlib doesn't provide this info. Because DCC is linear, at least
on GFX8, it's easy to compute the size of one slice.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Kenneth Graunke [Sat, 4 May 2019 03:27:40 +0000 (20:27 -0700)]
iris: Defer closing and freeing VMA until buffers are idle.
There will unfortunately be circumstances where we cannot re-use a
virtual memory address until it's no longer active on the GPU. To
facilitate this, we instead move BOs to a "dead" list, and defer
closing them and returning their VMA until they are idle. We
periodically sweep these away in cleanup_bo_cache, which triggers
every time a new object's refcount hits zero.
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Tested-by: Jordan Justen <jordan.l.justen@intel.com>
Kenneth Graunke [Sat, 23 Mar 2019 17:04:16 +0000 (10:04 -0700)]
iris: Add an explicit alignment parameter to iris_bo_alloc_tiled().
In the future, some images will need to be aligned to a larger value
than 4096. Most buffers, however, don't have any such requirement,
so for now we only add the parameter to iris_bo_alloc_tiled() and
leave the others with the simpler interface.
v2: Fix missing alignment in vma_alloc, caught by Caio!
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Tested-by: Jordan Justen <jordan.l.justen@intel.com>
Iago Toral Quiroga [Thu, 20 Jun 2019 11:46:02 +0000 (13:46 +0200)]
v3d: do not flush jobs that are synced with 'Wait for transform feedback'
Generally, we achieve this by skipping the flush on calls to
v3d_flush_jobs_writing_resource() when we detect that the resource is written
in the current job from a transform feedback write.
The exception to this is the case where the caller is about to map the
resource, in which case we need to flush immediately since we can only emit
'Wait for transform feedback' commands on rendering jobs. We add a parameter
to the function so the caller can identify that scenario.
Reviewed-by: Eric Anholt <eric@anholt.net>
Iago Toral Quiroga [Thu, 20 Jun 2019 10:14:17 +0000 (12:14 +0200)]
v3d: emit 'Wait for transform feedback' commands when needed
The hardware can flush transform feedback writes before reads in the same
job by inserting this command.
This patch detects when the rendering state for the current draw call reads
resources that had been previously written by transform feedback in the
same job and inserts the 'Wait for transform feedback' command before
emitting the new draw.
v2 (Eric):
- this was intended to look at job->tf_write_prscs for TF jobs.
- clear job->tf_write_prscs after we emit the TF flush.
- can skip flushes for fragment shader reads from TF.
v3 (Eric):
- all resources in job->tf_write_prscs are resources written by TF so
we don't need to check if they are bound to PIPE_BIND_STREAM_OUTPUT.
- documented optimization opportunity for geometry stages.
Reviewed-by: Eric Anholt <eric@anholt.net>
Iago Toral Quiroga [Thu, 20 Jun 2019 11:38:56 +0000 (13:38 +0200)]
v3d: keep track of resources written by transform feedback
The hardware provides a feature to sync reads from previous transform feedback
writes in the same job so if we use this mechanism we no longer have to flush
the job.
In order to identify this scenario we need a mechanism to identify resources
that are written by transform feedback.
v2: use _mesa_pointer_set_create (Eric)
Reviewed-by: Eric Anholt <eric@anholt.net>
Mike Blumenkrantz [Thu, 30 May 2019 12:47:59 +0000 (08:47 -0400)]
st/dri: fix typo in format table for GR1616 format
the dri image format here should match the fourcc format
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Mike Blumenkrantz [Wed, 29 May 2019 20:56:30 +0000 (16:56 -0400)]
st/dri: pass dri2_format_mapping directly to dri2_create_image_from_winsys
this makes the entire struct available for use here
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Mike Blumenkrantz [Wed, 29 May 2019 20:41:59 +0000 (16:41 -0400)]
mesa/st: simplify format usage in st_bind_egl_image
the formats handled in the switch statement will always return an
unknown mesa format, so process them directly and leave the default
case for other/unknown formats
no functional changes
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Kenneth Graunke [Wed, 26 Jun 2019 07:05:06 +0000 (00:05 -0700)]
iris: Use MI_COPY_MEM_MEM for tiny resource_copy_region calls.
If our resource_copy_region size is a small number of DWords, then
instead of firing up BLORP, we can simply use MI_COPY_MEM_MEM (after
a CS stall). We also try and select the optimal batch.
Improves performance in Shadow of Mordor on Low settings at 1920x1080
on Skylake GT4e by 0.689096% +/- 0.473968% (n=4). It tries to copy
4 bytes of data to a buffer which was most recently used as a writable
compute shader SSBO. Previously we were switching from compute to the
render pipeline, then firing up all of blorp_buffer_copy...for 4 bytes.
I arbitrarily decided to support 4/8/12/16 bytes. Jason thinks this
is about the right threshold where it's cheaper to use MI_COPY_MEM_MEM.
Bas Nieuwenhuizen [Sat, 29 Jun 2019 01:07:03 +0000 (03:07 +0200)]
radv: Only allocate supplied number of descriptors when variable.
Fixes: b5e04e9217b "radv: Support allocating variable size descriptor sets."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111019
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Eric Engestrom [Thu, 13 Dec 2018 17:35:28 +0000 (17:35 +0000)]
egl: simplify loop
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Sagar Ghuge<sagar.ghuge@intel.com>
Eric Anholt [Thu, 20 Jun 2019 17:35:32 +0000 (10:35 -0700)]
sparc: Reuse m_vector_asm.h.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Eric Anholt [Thu, 20 Jun 2019 17:27:28 +0000 (10:27 -0700)]
mesa: Enable asm unconditionally, now that gen_matypes is gone.
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Eric Anholt [Thu, 20 Jun 2019 17:18:41 +0000 (10:18 -0700)]
mesa: Replace gen_matypes with a simple header for V4F/mat layout.
We can greatly simplify our builds by just hardcoding GLvector4f and
GLmatrix's layouts.
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Eric Anholt [Thu, 20 Jun 2019 16:18:20 +0000 (09:18 -0700)]
matypes: Drop some unused defines.
Most of these haven't been used since the conversion from checked-in
matypes to generation. By cutting down the generated contents, this
should clarify why the file is generated: we need
architecture-specific offsets to the V4F fields in the asm that uses
it.
v2: Keep matrix offsets to prevent x86 build breakage..
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Eric Engestrom [Sat, 29 Jun 2019 23:14:47 +0000 (00:14 +0100)]
meson: drop duplicate source & inc_dir
These two are already pulled from `idep_vulkan_util_headers`.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Eric Engestrom [Sat, 29 Jun 2019 23:01:15 +0000 (00:01 +0100)]
swrast: simplify function pointer calls
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Eric Engestrom [Tue, 27 Nov 2018 12:27:45 +0000 (12:27 +0000)]
egl/wayland: use bitset.h for `formats` bit set
Currently only 7 formats are supported, but we don't want the 16 limit
(it's an `unsigned`) to hit us by surprise :]
Let's use bitset.h's BITSET magic to allow us to have any number of
formats, with a static assert to make sure we don't forget to update it.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Sagar Ghuge [Tue, 4 Jun 2019 20:05:20 +0000 (13:05 -0700)]
intel/tools: Add assembler unit tests for ROL/ROR instructions
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Tue, 4 Jun 2019 20:04:49 +0000 (13:04 -0700)]
intel/tools: Add ROL/ROR support in assembler
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Tue, 4 Jun 2019 00:11:57 +0000 (17:11 -0700)]
nir: Add lower_rotate flag and set to true in all drivers
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Suggested-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Thu, 30 May 2019 21:14:52 +0000 (14:14 -0700)]
intel/compiler: Emit ROR and ROL instruction
v2: Reorder patch (Matt Turner)
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Thu, 30 May 2019 21:15:51 +0000 (14:15 -0700)]
nir: Add optimization to use ROR/ROL instructions
v2: 1) Add more optimization rules for ROL/ROR (Matt Turner)
2) Add lowering rules for ROL/ROR (Matt Turner)
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Thu, 30 May 2019 21:11:58 +0000 (14:11 -0700)]
nir: Add urol and uror opcodes
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Sagar Ghuge [Wed, 29 May 2019 18:43:30 +0000 (11:43 -0700)]
intel/compiler: Enable the emission of ROR/ROL instructions
v2: 1) Drop changes for vec4 backend as on Gen11+ we don't support
align16 mode (Matt Turner)
Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Alyssa Rosenzweig [Thu, 27 Jun 2019 21:13:10 +0000 (14:13 -0700)]
panfrost: Implement instanced rendering
We implement GLES3.0 instanced rendering with full support for instanced
arrays (via instance divisors). To do so, we use the new invocation
helpers to invoke a triplet of (1, vertex_count, instance_count), rather
than simply (1, vertex_count, 1). We rewrite the attribute handling code
into a new pan_instancing.c file which handles both the simple LINEAR
case for non-instanced as well as each of the new instancing cases:
MODULO (for per-vertex attributes), POT and NPOT divisors.
As a side effect, we rework how vertex buffers are handled, duplicating
them to be 1:1 with vertex descriptors to simplify instancing code paths
dramatically. This might be a performance regression, but this remains
to be seen; if so, we can always deduplicate later with some added logic
in pan_instancing.c
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Thu, 27 Jun 2019 17:18:22 +0000 (10:18 -0700)]
panfrost/decode: Compute padded_num_vertices for MODULO
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Fri, 28 Jun 2019 16:30:59 +0000 (09:30 -0700)]
panfrost/midgard: Emit type appropriate ld_vary
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Fri, 28 Jun 2019 16:07:30 +0000 (09:07 -0700)]
panfrost/midgard: Add unsigned ld/st ops
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Thu, 27 Jun 2019 22:33:07 +0000 (15:33 -0700)]
panfrost/midgard: Use the appropriate ld_attr type
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Thu, 27 Jun 2019 15:29:06 +0000 (08:29 -0700)]
panfrost: Implement dispatch helpers
Rather than open-coding workgroups_shift_* type fields, we include a
general routine for packing the vertex/tiler/compute descriptor based on
the provided dispatch parameters.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Thu, 27 Jun 2019 14:43:33 +0000 (07:43 -0700)]
panfrost: Remove ancient comment
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Mon, 1 Jul 2019 14:39:22 +0000 (07:39 -0700)]
panfrost: Extend software tiling to larger bpp
Should not affect lima.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Alyssa Rosenzweig [Tue, 25 Jun 2019 15:09:58 +0000 (08:09 -0700)]
panfrost: Rewrite u-interleaving code
Rather than using a magic lookup table with no explanations, let's add
liberal comments to the code to explain what this tiling scheme is and
how to encode/decode it efficiently.
It's not so mysterious after all -- just reordering bits with some XORs
thrown in.
v2: Correct copyright identifier. Fix spelling error. Switch space_4 to
a LUT. Fix comment typo. Use LUT instead of space_x tricks. Fallback on
generic rather than split up unaligned writes.
v3: Correct stride order (fixes crash loading). Correct coordinate
system mishap.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Rob Clark [Mon, 1 Jul 2019 13:14:41 +0000 (06:14 -0700)]
freedreno: update generated registers
Corrects the a3xx texconst state for TILE_MODE.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Samuel Pitoiset [Wed, 26 Jun 2019 13:11:03 +0000 (15:11 +0200)]
radv: rework how the number of VGPRs is computed
Just a cleanup, it shouldn't change anything.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Wed, 26 Jun 2019 13:11:02 +0000 (15:11 +0200)]
radv: gather if a vertex shaders needs the instance ID
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Thu, 27 Jun 2019 13:06:17 +0000 (15:06 +0200)]
radv: fix decompressing DCC levels with compute
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Wed, 26 Jun 2019 13:11:01 +0000 (15:11 +0200)]
radv: the number of VGPR_COMP_CNT for GS is expected to be 0 on GFX8
Just move around the switch case. GFX9+ is handled below.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Wed, 26 Jun 2019 13:11:00 +0000 (15:11 +0200)]
radv: reduce number of VGPRs for TESS_EVAL if primitive ID is not used
We only need to 2.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Samuel Pitoiset [Thu, 27 Jun 2019 13:06:15 +0000 (15:06 +0200)]
radv: make sure to mark the image as compressed when clearing DCC levels
Found while working on DCC for arrays.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Michel Dänzer [Fri, 28 Jun 2019 09:07:39 +0000 (11:07 +0200)]
targets/opencl: Add clangASTMatchers library as dependency
Fixes link failure since clang r364424 "[clang/DIVar] Emit the flag for
params that have unmodified value", clangCodeGen depends on
clangASTMatchers now.
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
Caio Marcelo de Oliveira Filho [Fri, 22 Mar 2019 04:47:02 +0000 (21:47 -0700)]
glsl/nir: Lower buffers using Binding instead of Names
When using ARB_gl_spirv, the block names are optional and the uniform
blocks are referred using Bindings instead. Teach
gl_nir_lower_buffers to handle those.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Sat, 29 Dec 2018 14:08:50 +0000 (15:08 +0100)]
glspirv: Enable the new deref-base UBO/SSBO path on gl_spirv
Among other things, it supports arrays of arrays of UBO/SSBO (default
codepath doesn't).
Acked-by: Timothy Arceri <tarceri@itsqueeze.com>
v2: nir_address_format_vk_index_offset got renamed to
nir_address_format_32bit_index_offset (after rebase against master)
v3: the ptr_type fields in spirv_to_nir_options got changed to be of
type nir_address_format.
v4: remove phys_ssbo_addr_format and push_const_addr_format as they are
not used by glspirv
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Alejandro Piñeiro [Thu, 30 Nov 2017 11:50:24 +0000 (12:50 +0100)]
i965: call to gl_nir_link_uniform_blocks
When using a SPIR-V shader. Note that needs to be done before linking
uniforms, so when creating the uniform storage entries, block_index
could be filled properly (among other things).
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Sat, 15 Sep 2018 14:42:58 +0000 (16:42 +0200)]
i965: use GLboolean for all brw_link_shader returns
The function had a mix of true/GL_TRUE and false/GL_FALSE
returns. Using GL_TRUE/GL_FALSE as the function returns a GLboolean.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Sat, 1 Sep 2018 11:18:24 +0000 (13:18 +0200)]
nir/linker: update already processed uniforms search for UBOs/SSBOs
Until now, we were using the uniform explicit location to check if the
current nir variable was already processed while adding entries on the
uniform storage. But for UBOs/SSBOs, entries are added too but we lack
a explicit location.
For those we need to rely on the UBO/SSBO binding and the unifor
storage block_index. In that case several uniforms would need to be
updated at once.
v2: (from Timothy review)
* Improve wording and fix typos of some long comments.
* Rename update_uniform_storage for mark_stage_as_active
v3: (from cmarcelo review)
* Fixed some comment typos
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Fri, 31 Aug 2018 10:20:49 +0000 (12:20 +0200)]
nir/linker: fill up uniform_storage with explicit data
Specifically, offset, stride (coming from arrays or matrices) and
row_major.
On GLSL, most of that info is computed using the layout qualifier, but
on ARB_gl_spirv they are explicit, and for Mesa, included on the
glsl_type.
From ARB_gl_spirv spec:
"Mapping of layouts
std140/std430 -> explicit *Offset*, *ArrayStride*, and
*MatrixStride* Decoration on struct members""
"7.6.2.spv SPIR-V Uniform Offsets and Strides
The SPIR-V decorations *GLSLShared* or *GLSLPacked* must not be
used. A variable in the *Uniform* Storage Class decorated as a
*Block* must be explicitly laid out using the *Offset*,
*ArrayStride*, and *MatrixStride* decorations"
For offset we needed to include the parent and index_in_parent while
processing the type, as the offset is maintained on glsl_struct_field
of the parent type, not on the type itself.
v2: Fix the default values for MATRIX_STRIDE, ARRAY_STRIDE and
ROW_MAJOR when the variable is not backed by a buffer object
(Antia Puentes).
v3: Update after Jason series "SPIR-V: Use NIR deref instructions for
UBO/SSBO access" that included just one explicit stride, instead
of a previous patch we wrote that had matrix_stride and
array_stride (Alejandro)
Signed-off-by: Antia Puentes <apuentes@igalia.com>
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Wed, 29 Aug 2018 14:24:12 +0000 (16:24 +0200)]
nir/linker: use only the array element type for array of ssbo/ubo
For this interfaces, the inner members are added only once as uniforms
or resources, in opposite to other cases, like a uniform array of
structs.
For those guessing why a issue (16) from ARB_program_interface_query
was used, instead of a quote of the core spec: The core spec is not
really clear about how members of arrays of blocks should be
enumerated.
On GLSL this was also problematic, specially when we were trying to
pass the 4.5 CTS tests. See commit "glsl: Fix program interface
queries relating to interface blocks"
(
4c4d9e4f032d5753034361ee70aa88d16d3a04b4), as a reference. That one
also needed to rely on issue (16) to justify the change, pointing that
the core spec needs to be clarified.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Mon, 12 Feb 2018 14:50:18 +0000 (15:50 +0100)]
nir/linker: fill is_shader_storage for uniforms
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Thu, 30 Nov 2017 11:01:52 +0000 (12:01 +0100)]
nir/linker: add gl_nir_link_uniform_blocks.c
Adding the ability to link uniform blocks and shader storage blocks
using NIR, intended for ARB_gl_spirv support. Among other things, this
linking needs to take into account that everything should work without
names, as they could be not present, while the GLSL IR uniform block
linking was wrote with the names on its core.
The other major difference compared with the GLSL IR linker is that we
don't deal with layouts. There are no references to std140, std430,
etc. Layouts are expressed through explicit offset, array stride and
matrix stride. That simplifies how the buffer size are computed. But
also means that we couldn't use the existing methods at glsl_types, so
we needed to implement new methods.
It is worth to note that this linking do a iteration over the
glsl_types, similarly to what the linking uniforms do. A possible
future improvement would be refactor both cases to try to share more
code that it sharing right now. On GLSL IR there are a class visitor,
specialized on each case, for that sharing. As adding a class visitor
on C would more complicated, for now we are just iterating on both.
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Neil Roberts <nroberts@igalia.com>
Signed-off-by: Antia Puentes <apuentes@igalia.com>
v2: (from Timothy review)
* Fix variable name convention
* Stop to use _function_name convention
* Don't use // for comments
* "nir/linker: Keep track of the stages referencing an UBO/SSBO"
squashed with this patch
v3: (from Caio review)
* Don't delete the linked shader on failure
* Use rzalloc_array to avoid some explicit initializations
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Alejandro Piñeiro [Thu, 17 Jan 2019 12:20:54 +0000 (13:20 +0100)]
nir_types: add glsl_type_is_leaf helper
Helper used to know when a glsl_type is a leaf when iteraring through
a complex type. Note that GLSL IR linking also uses the concept of
leaf while doing the same iteration, although in that case it uses a
visitor. See link_uniform_blocks, process_array_leaf and others as
reference.
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Antia Puentes <apuentes@igalia.com>
v2:
* Moved from gl_nir_linker to nir_types, so it could be used on nir
xfb gathering (Timothy Arceri)
* Minor update after Timothy's series about record to struct
renaming landed master.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Alejandro Piñeiro [Wed, 16 Jan 2019 15:50:29 +0000 (16:50 +0100)]
glsl/nir: add glsl_types::explicit_size plus nir C wrapper
While using SPIR-V shaders (ARB_gl_spirv), layout data is not implicit
to a specific value (std140, std430, etc) but explicitly included on
the type (explicit values for offset, stride and row_major).
So this method is equivalent to the existing std140_size and
std430_size, but using such explicit values.
Note that the value returned by this method is only valid if such data
is set, so when dealing with SPIR-V shaders.
v2: (all changes suggested by Jason Ekstrand)
* Iterate through all struct members, instead of assume that fields
are ordered by offset
* Use else if
* Take into account the case that explicit_stride > elem_size, to
fine graine the final size on arrays and matrices
* Handle different bit-sizes in general, not just 32 and 64.
v3: (change suggested by Caio Marcelo de Oliveira Filho)
* fix up explicit_size() to consider interface types
Signed-off-by: Alejandro Piñeiro <apinheiro@igalia.com>
Signed-off-by: Antia Puentes <apuentes@igalia.com>
Signed-off-by: Neil Roberts <nroberts@igalia.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Alejandro Piñeiro [Wed, 6 Feb 2019 17:11:19 +0000 (18:11 +0100)]
glsl_types: add type::bit_size and glsl_base_type_bit_size helpers
Note that the nir_types glsl_get_bit_size is not a wrapper of this
one, because for bools at the nir level, we want to return size 1, but
at the glsl_types we want to return 32.
v2: reuse the new method in order to simplify is_16bit and is_32bit
helpers (Timothy)
v3: add a comment clarifying the difference between
glsl_base_type_bit_size and glsl_get_bit_size.
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>