Commit graph

103686 commits

Author SHA1 Message Date
Eric Anholt
f2ea936f48 v3d: Skip emitting texture config parameter 2 if it's just the defaults.
shader-db:
total instructions in shared programs: 91275 -> 90768 (-0.56%)
instructions in affected programs:     20702 -> 20195 (-2.45%)
2018-07-23 10:21:43 -07:00
Eric Anholt
421e99d777 v3d: Update an XXX comment for a path we handled in HW on V3D 4.x. 2018-07-23 10:21:43 -07:00
Eric Anholt
e7ae900341 v3d: Switch to using the new SFU instructions on V3D 4.x.
These instructions let us write directly to the phys regfile, instead of
just R4.  That lets us avoid moving out of R4 to avoid conflicting with
other SFU results, and to avoid conflicting with thread switches.

There is still an extra instruction of latency, which is not represented
in the scheduler at the moment.  If you use the result before it's ready,
the QPU will just stall, unlike the magic R4 mode where you'd read the
previous value.  That means that the following shader-db results aren't
quite representative (since we now cause some stalls instead of emitting
nops), but they're impressive enough that I'm happy with the change.

total instructions in shared programs: 95669 -> 91275 (-4.59%)
instructions in affected programs:     82590 -> 78196 (-5.32%)
2018-07-23 10:21:43 -07:00
Eric Anholt
58c1d3860f v3d: Add QPU pack/unpack for the new SFU instructions.
These instructions allow writing the result to any register, instead of a
special writeback to r4.
2018-07-23 10:21:43 -07:00
Eric Anholt
cdfa99657d v3d: Fix the name of the "flpop" operation.
Noticed while trying to sort a new op into the appropriate place to match
the documentation.
2018-07-23 10:21:43 -07:00
Eric Anholt
91e24e5718 v3d: Print the instruction we're testing in the QPU disasm/pack round-trip.
If we fail initial disassembly, it's good to know what instruction it was
that failed.
2018-07-23 10:21:42 -07:00
Eric Anholt
a1beb333d8 v3d: Drop unused vir_SAT() operation.
We lower saturates in NIR.
2018-07-23 10:21:42 -07:00
Eric Anholt
8dfc6ee317 v3d: Rotate through registers to improve post-RA scheduling options.
Similarly to VC4's implementation, by not picking r0 immediately upon
freeing it, we give the scheduler more of a chance to fit later writes in
earlier.  I'm not clear on whether there's any real cost to picking phys
over accumulators, so keep that behavior for now.

shader-db:
total instructions in shared programs: 96831 -> 95669 (-1.20%)
instructions in affected programs:     77254 -> 76092 (-1.50%)
2018-07-23 10:21:42 -07:00
Eric Anholt
1fb31819ae v3d: Allow reading from physical regs written in the previous instruction.
This restriction existed in V3D 2.x, but lifting it was a major change in
3.x.

shader-db results:
total instructions in shared programs: 98117 -> 96831 (-1.31%)
instructions in affected programs:     48520 -> 47234 (-2.65%)
2018-07-23 10:21:23 -07:00
Eric Engestrom
e6e22e4207 anv: remove unnecessary runtime copy of static string
It's actually also a bit safer, since now the compiler will warn if
the string is larger than the `.name` array.

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-07-23 17:56:08 +01:00
Alex Smith
54f8f1545f anv: Pay attention to VK_ACCESS_MEMORY_(READ|WRITE)_BIT
According to the spec, these should apply to all read/write access
types (so would be equivalent to specifying all other access types
individually). Currently, they were doing nothing.

v2: Handle VK_ACCESS_MEMORY_WRITE_BIT in dstAccessMask.

Signed-off-by: Alex Smith <asmith@feralinteractive.com>
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-07-23 15:29:43 +01:00
Erik Faye-Lund
dc938b8398 virgl: remove unused stride-arguments
The IOCTLs doesn't pass this along, so computing them in the first
place is kinda pointless.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
2018-07-23 11:21:09 +01:00
Samuel Pitoiset
6c58bc8d9c radv: print a big warning when RADV_TRACE_FILE is set
Users shouldn't use this debugging option except when we
ask them to do!

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-23 11:34:42 +02:00
Samuel Pitoiset
6e32d9e7b0 radv: fix a memleak for merged shaders on GFX9
modules[i] can be NULL for merged shaders but we have to
free the NIR code. radv_can_dump_shader_stats() already handles
if modules[i] is NULL, no need to check it twice.

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-23 11:34:39 +02:00
Jason Ekstrand
d0ee0a0a5d intel/blorp: Fix blits to R8G8B8_UNORM_SRGB sRGB harder
The first fix attempt contained a nasty typo which somehow didn't get
caught in review.  It also didn't work as intended because the sRGB
conversion was happening but then throwing away all but the red channel
because it dind't know it was RGB.  Really, it's my fault for trying to
fix a bug without first writing tests.  I've now written tests and they
pass with this change. :)

Fixes: 11712b9ca1 "intel/blorp: Fix blits to R8G8B8_UNORM_SRGB"
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-07-23 00:36:39 -07:00
Jason Ekstrand
abd629eb3d anv: Stop setting 3DSTATE_PS_EXTRA::PixelShaderHasUAV
We've had several broadwell hangs that have come down to this bit just
not working correctly.  Most recently, we've had a pile of hangs
reported with apps running under DXVK:

https://github.com/doitsujin/dxvk/issues/469

Instead, use the bit that doesn't try to imply weird D3D coherency
things and just force-enables the PS like we want.

cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2018-07-22 23:43:19 -07:00
Jason Ekstrand
b99493c628 anv: Properly handle GetImageSubresourceLayout on complex images
We support mipmapped and arrayed linear images so we need to support
vkGetImageSubresourceLayout on them.  Fortunately, it's just a trivial
call into ISL.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
2018-07-22 23:24:10 -07:00
Timothy Arceri
78f391d343 radeonsi/nir: make use of nir_lower_load_const_to_scalar()
This allows NIR to CSE more operations. LLVM does this also so the
impact is limited, however doing this in NIR allows other opts to
make progress. For example some loops in Civilization Beyond Earth
shaders are unrolled.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
2018-07-23 09:48:51 +10:00
Ilia Mirkin
257128079c anv/gen9: expose VK_EXT_post_depth_coverage
Note that the use of ICMS_INNER_CONSERVATIVE disagrees with the GL driver.
Perhaps it's more performant than ICMS_NORMAL and is otherwise permitted?
Not sure, so I left it as-is.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-07-22 14:56:44 -07:00
Ilia Mirkin
768f143667 spirv: add support for SPV_KHR_post_depth_coverage
Allow the capability to be exposed, and convert the new execution mode
into fs state.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
2018-07-22 14:56:36 -07:00
Mauro Rossi
6cbbd5b4f8 android: util/disk_cache: fix building errors in gallium drivers
This patch applies the necessary changes in Android.common.mk
as per automake rules, to avoid following building error:

external/mesa/src/gallium/drivers/nouveau/nouveau_screen.c:159:8:
error: implicit declaration of function 'disk_cache_get_function_timestamp'
is invalid in C99 [-Werror,-Wimplicit-function-declaration]
   if (disk_cache_get_function_timestamp(nouveau_disk_cache_create,
       ^
1 error generated.

(v2) -DENABLE_SHADER_CACHE Android cflag is kept, to leave the AS-IS capability enabled

Fixes: cc10b34 ("util/disk_cache: Fix disk_cache_get_function_timestamp with disabled cache.")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-21 12:06:38 +02:00
Chih-Wei Huang
e7ffd3fb08 Android: fix a missing nir_intrinsics.h error
The commit 76dfed8ae2 changed nir_intrinsics.h to be a generated
header, but the corresponding dependency was not updated for Android.
It causes the error:

[  0% 19/4336] target  C: libmesa_pipe_radeonsi <= external/mesa/src/gallium/drivers/radeonsi/si_debug.c
...
In file included from external/mesa/src/gallium/drivers/radeonsi/si_debug.c:25:
In file included from external/mesa/src/gallium/drivers/radeonsi/si_pipe.h:28:
In file included from external/mesa/src/gallium/drivers/radeonsi/si_shader.h:140:
In file included from external/mesa/src/amd/common/ac_llvm_build.h:30:
external/mesa/src/compiler/nir/nir.h:966:10: fatal error: 'nir_intrinsics.h' file not found
         ^~~~~~~~~~~~~~~~~~
1 error generated.

Fixes: 76dfed8ae2 ("nir: mako all the intrinsics")
Signed-off-by: Chih-Wei Huang <cwhuang@linux.org.tw>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Mauro Rossi <issor.oruam@gmail.com>
2018-07-21 08:50:23 +02:00
Bas Nieuwenhuizen
e1febbefe8 nir: Fix end of function without return warning/error.
There always is a continue block, so let us just do unreachable.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Fixes: 8cacf38f52 "nir: Do not use continue block after removing it."
CC: 18.1 <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107312
2018-07-20 22:27:39 +02:00
Danylo Piliaiev
d24c35c3fb st: Sweep NIR after linking phase to free held memory
After optimization passes and many trasfromations most of memory
NIR holds is a garbage which was being freed only after shader deletion.
Freeing it at the end of linking will save memory which would be useful
in case there are a lot of complex shaders being compiled.
The common case for this issue is 32bit game running under Wine.

The cost of the optimization is around ~3-5% of compilation speed
with complex shaders.

Signed-off-by: Danylo Piliaiev <danylo.piliaiev@globallogic.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
2018-07-20 11:26:12 -07:00
Eric Anholt
945524ba0e st/dri: Don't require a dri_format for image creation.
Nothing in EGL_KHR_gl_image.txt seems to let us deny creation based on
formats, and doing so causes many failures in
dEQP-EGL.functional.image.api.*

The NONE value we were protecting from only gets looked at in the
__DRI_IMAGE_ATTRIB_FORMAT and __DRI_IMAGE_ATTRIB_FOURCC queries, which are
used from wayland and gbm (which throw an error cleanly on unknown format)
and DMABUF export.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
2018-07-20 11:26:12 -07:00
Eric Anholt
f6750456c5 egl: Refuse EGL_MESA_image_dma_buf_export if we don't have a DRM fourcc.
The EGL CTS expects that you can make images from all sorts of things,
including things like z16 and s8, which we don't have DRM fourccs for.
Just return an error when trying to export one of those.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
2018-07-20 11:26:12 -07:00
Eric Anholt
a221f9709e v3d: Fix incorrect handling of two fences created back-to-back.
Recreating our context's syncobj with ALREADY_SIGNALED meant that if you
created two fences in a row, then waiting on the second would succeed
immediately.  Instead, export a sync file in the gallium fence (since we
don't have a syncobj clone ioctl), and just create a new syncobj to wait
on whenever we need to.

Noticed while debugging
dEQP-GLES3.functional.fence_sync.client_wait_sync_finish
2018-07-20 11:11:29 -07:00
Eric Anholt
fc28692a5a v3d: Fix the timeout value passed to drmSyncobjWait().
The API wants an absolute time, so we need to go add gallium's argument to
CLOCK_MONOTONIC.
2018-07-20 11:11:29 -07:00
Eric Anholt
4f04bd68cf v3d: Fix drmSyncobjWait() return value checking even more.
It tends to return >0 in the success case (I think the value is something
like "how much of the timeout remained").  Fixes
dEQP-GLES3.functional.fence_sync.client_wait_sync_finish
2018-07-20 11:11:29 -07:00
Eric Anholt
2f90879a34 v3d: Use the list_first_entry/list_last_entry macros. 2018-07-20 11:11:29 -07:00
Eric Anholt
d0e53373e5 v3d: Move BO cache counting to dump time instead of cache management.
This is one less way to get the dump stats wrong.
2018-07-20 11:11:29 -07:00
Eric Anholt
7d6aef6fa5 v3d: Reduce the stale BO reclamation spam with dump_stats set.
This was obviously meant to be when we were actually freeing a BO, not
just when there was at least one BO in the list.
2018-07-20 11:11:29 -07:00
Eric Anholt
5d11094db1 v3d: Respect a sampler view's first_layer field.
Fixes texturing from EGL images created from cubemap faces, as in
dEQP-EGL.functional.image.create.gles2_cubemap_negative_x_rgba_texture
2018-07-20 11:11:29 -07:00
Sonny Jiang
c6737756ad radeonsi: emit_spi_map packets optimization
v2: marek: remove an empty line before break;
    rename reg_val_seq -> spi_ps_input_cntl
    "type * x" -> "type *x"

Signed-off-by: Sonny Jiang <sonny.jiang@amd.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
2018-07-20 13:50:26 -04:00
Gert Wollny
4d094993c3 virgl: Expose GL_ARB_copy_image if host supports it
Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
2018-07-20 19:15:12 +02:00
Gert Wollny
0bde9739c0 virgl: Allow RGB32* textures only as buffer objects
When requesting a texture of the internal format GL_RGB32F Gallium will
try to allocate a renderable texture and returns RGBA32F or RGBX32F, but
when one requests GL_RGB32I or GL_RGB32UI the according 3-component
texture will be returned. This leads to problems later, when one wants
to use glCopyImageSubData to copy data between these textures that should
be compatible, but given the way virgl and Gallium  handle this the latter
fails with an assertion, because the per-texel bit size is different.

By allowing the GL_RGB32* only for texture buffers these problems are avoided
without losing the ARB_tbo_rgb32 extension (thanks Ilia Mirkin).

v2: Correct spelling (Gurchetan Singh)

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
2018-07-20 19:12:49 +02:00
Lionel Landwerlin
feb43ef674 intel: tools: dump: protect against multiple calls on destructor
When running gdb, make sure to pass the LD_PRELOAD variable only to
the executed program, not the debugger. Otherwise the debugger will
run the preloaded constructor/destructor too and bad things will
happen.

Suggested-by: Rafael Antognolli <rafael.antognolli@intel.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
2018-07-20 17:36:56 +01:00
Lionel Landwerlin
2a9069eb97 intel: tools: dump: make dump tool reliable under gdb
The problem with passing the configuration of the dump lib through a
file descriptor is that it can be read only once. But under gdb you
might want to rerun your program multiple times.

This change hands the configuration through a temporary file that is
deleted once the command line passes to intel_dump_gpu has exited.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
2018-07-20 17:36:37 +01:00
Samuel Pitoiset
1efc9094e0 radv: don't flush DB before subpass FS resolves
That shouldn't be needed because the DB state is invalid.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-20 17:30:13 +02:00
Gert Wollny
016807161b r600: Correct evaluation of cube array index and face
The array index needs to be corrected and it must be insured that it is
rounded and its value is non-negative before it is combined with the
face id.

v5: Use RNDNE instead of ADD 0.5 and FLOOR (Ilia Mirkin)

v6: Fix type (Roland Scheidegger)

Fixes 182 from android/cts/master/gles31-master.txt:
  dEQP-GLES31.functional.texture.filtering.cube_array.formats.*
  dEQP-GLES31.functional.texture.filtering.cube_array.sizes.*
  dEQP-GLES31.functional.texture.filtering.cube_array.combinations.nearest_mipmap_*
  dEQP-GLES31.functional.texture.filtering.cube_array.combinations.linear_mipmap_*
  dEQP-GLES31.functional.texture.filtering.cube_array.no_edges_visible.*

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
2018-07-20 14:55:12 +02:00
Gert Wollny
01766c1db6 r600: correct texture offset for array index lookup
Correct the array index for TEXTURE_*1D_ARRAY, and TEXTURE_*2D_ARRAY
The standard says the array index is evaluated according to

   floor(z + 0.5)

but RNDNE is sufficient also for the test cases were z is close to 1.5
and it is likely to hit 1.5, the corner case were RNDNE gives a result
different from above formula.

v5: - Use RNDNE instead of ADD 0.5 and FLOOR (Ilia Mirkin)
    - update commit message

Fixes 325 tests from android/cts/master/gles3-master.txt:
  dEQP-GLES3.functional.shaders.texture_functions.texture.*sampler2darray*
  dEQP-GLES3.functional.shaders.texture_functions.textureoffset.*sampler2darray*
  dEQP-GLES3.functional.shaders.texture_functions.texturelod.sampler2darray*
  dEQP-GLES3.functional.shaders.texture_functions.texturelodoffset.*sampler2darray*
  dEQP-GLES3.functional.shaders.texture_functions.texturegrad.*sampler2darray*
  dEQP-GLES3.functional.shaders.texture_functions.texturegradoffset.*sampler2darray*
  dEQP-GLES3.functional.texture.filtering.2d_array.formats.*
  dEQP-GLES3.functional.texture.filtering.2d_array.sizes.*
  dEQP-GLES3.functional.texture.filtering.2d_array.combinations.*
  dEQP-GLES3.functional.texture.shadow.2d_array.*
  dEQP-GLES3.functional.texture.vertex.2d_array.*

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
2018-07-20 14:55:12 +02:00
Gert Wollny
626bd455d4 r600: Delay emission of texture gradients and lookup offsets
Gradients used in texture lookups and the offsets must reside in the
same fetch clause (the first is imposed by the hardware and the second
is expected by sb). In order to ensure that no ALU clause is inserted
between emission and use of these, delay the emission of these
instructions until the texture instruction using them is also emitted.

This is needed in preparation for the correction of the texture array
indices.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
2018-07-20 14:55:12 +02:00
Bas Nieuwenhuizen
cc10b34e9e util/disk_cache: Fix disk_cache_get_function_timestamp with disabled cache.
radv always needs it, so just check the header instead. Also
do not declare the function if the variable is not set, so we
get a nice compile error instead of failing to open a device
at runtime.

Fixes: b87ef9e606 "util: fix MSVC build issue in disk_cache.h"
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
2018-07-20 12:09:19 +02:00
Bas Nieuwenhuizen
8cacf38f52 nir: Do not use continue block after removing it.
Reinserting code directly before a jump means the block gets split
and merged, removing the original block and replacing it in the
process.

Hence keeping a pointer to the continue block over a reinsert
causes issues.

This code changes nir_opt_if to simply look for the new continue
block.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107275
CC: 18.1 <mesa-stable@lists.freedesktop.org>
2018-07-20 12:09:19 +02:00
Samuel Pitoiset
ce454d02cc radv: simplify a condition in radv_src_access_flush()
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-20 10:17:17 +02:00
Samuel Pitoiset
1ff25c4e6b radv: save current state just before resolving with FS
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-20 10:17:15 +02:00
Samuel Pitoiset
c3d5f124c6 radv: don't check if a subpass has resolve attachments twice
We already check that in radv_cmd_buffer_resolve_subpass().

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-20 10:17:13 +02:00
Samuel Pitoiset
0a8127bbfb radv: make use of radv_subpass_barrier() when resolving subpasses
The goal is to use radv_barrier()/radv_subpass_barrier() as
much as possible for further optimizations.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
2018-07-20 10:17:11 +02:00
Rhys Perry
409a60df3b nv50/ir: move LateAlgebraicOpt back to right after ConstantFolding
total instructions in shared programs : 5480808 -> 5472107 (-0.16%)
total gprs used in shared programs    : 647530 -> 647532 (0.00%)
total shared used in shared programs  : 389120 -> 389120 (0.00%)
total local used in shared programs   : 21064 -> 21064 (0.00%)
total bytes used in shared programs   : 58551648 -> 58459352 (-0.16%)

                local     shared        gpr       inst      bytes
    helped           0           0          73        2609        2609
      hurt           0           0          71          34          34
2018-07-19 23:34:58 +02:00
Rhys Perry
2afef231db nv50/ir: handle SHLADD in IndirectPropagation
An alternative solution to the problem fixed in
0bd83d0 ("nv50/ir: move LateAlgebraicOpt to the very end").

total instructions in shared programs : 5481195 -> 5480808 (-0.01%)
total gprs used in shared programs    : 647535 -> 647530 (-0.00%)
total shared used in shared programs  : 389120 -> 389120 (0.00%)
total local used in shared programs   : 21064 -> 21064 (0.00%)
total bytes used in shared programs   : 58555784 -> 58551648 (-0.01%)

                local     shared        gpr       inst      bytes
    helped           0           0           2          34          34
      hurt           0           0           0           0           0
2018-07-19 23:34:58 +02:00