Commit graph

70222 commits

Author SHA1 Message Date
Marek Olšák
99eef3b8b3 st/mesa: add a debug option to compile shaders at link time
v2: fix crashes

Tested-by: Tom Stellard <thomas.stellard@amd.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
2015-04-16 18:36:29 +02:00
Kristian Høgsberg
993a6288f7 i965: Rewrite ir_tex to ir_txl with lod 0 for vertex shaders
The ir_tex opcode turns into a sample or sample_c message, which will try to
compute derivatives to determine the lod. This produces garbage for
non-fragment shaders where the sample coordinates don't correspond to
subspans.

We fix this by rewriting the opcode from ir_tex to ir_txl and setting the
lod to 0.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89457
Cc: "10.5" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Kristian Høgsberg <kristian.h.kristensen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
2015-04-16 09:18:30 -07:00
Emil Velikov
a7d018accf radeonsi: remove bogus r600-- triple
As mentioned by Michel Dänzer for LLVM >= 3.6 we create the
LLVMTargetMachine (with triple amdgcn--), as we setup the radeonsi
context. For older LLVM or hardware (r600) the triple is always r600--
and is created at a later stage - radeon_llvm_compile()

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
2015-04-16 14:15:19 +01:00
Neil Roberts
33f73e93ff i965/skl: Add the header for constant loads outside of the generator
Commit 5a06ee738 added a step to the generator to set up the message
header when generating the VS_OPCODE_PULL_CONSTANT_LOAD_GEN7
instruction. That pseudo opcode is implemented in terms of multiple
actual opcodes, one of which writes to one of the source registers in
order to set up the message header. This causes problems because the
scheduler isn't aware that the source register is written to and it
can end up reorganising the instructions incorrectly such that the
write to the source register overwrites a needed value from a previous
instruction. This problem was presenting itself as a rendering error
in the weapon in Enemy Territory: Quake Wars.

Since commit 588859e1 there is an additional problem that the double
register allocated to include the message header would end up being
split into two. This wasn't happening previously because the code to
split registers was explicitly avoided for instructions that are
sending from the GRF.

This patch fixes both problems by splitting the code to set up the
message header into a new pseudo opcode so that it will be done
outside of the generator. This new opcode has the header register as a
destination so the scheduler can recognise that the register is
written to. This has the additional benefit that the scheduler can
optimise the message header slightly better by moving the mov
instructions further away from the send instructions.

On Skylake it appears to fix the following three Piglit tests without
causing any regressions:

 gs-float-array-variable-index
 gs-mat3x4-row-major
 gs-mat4x3-row-major

I think we actually may need to do something similar for the fs
backend and possibly for message headers from regular texture sampling
but I'm not entirely sure.

v2: Make sure the exec-size is retained as 8 for the mov instruction
    to initialise the header from g0. This was accidentally lost
    during a rebase on top of 07c571a39f.
    Split the patch into two so that the helper function is a separate
    change.
    Fix emitting the MOV instruction on Gen7.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89058
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
2015-04-16 13:02:26 +01:00
Neil Roberts
a9e4cf5d32 i965/vec4: Add a helper function to emit VS_OPCODE_PULL_CONSTANT_LOAD
There were three places in the visitor that had a similar chunk of
code to emit the VS_OPCODE_PULL_CONSTANT_LOAD opcode using a register
for the offset. This patch combines the chunks into a helper function
to reduce the code duplication. It will also be useful in the next
patch to expand what happens on Gen9+. This shouldn't introduce any
functional changes.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
2015-04-16 13:01:43 +01:00
Jose Fonseca
037e0e78ab mesa,glsl: rename interface to programInterface.
`interface` is a define on Windows -- an alias for `struct` keyword,
used when declaring COM interfaces in C or C++.

So use instead `programInterface`, therefore matching the name used
in GL_ARB_program_interface_query spec/headers, which was renamed exactly
for the same reason:

  "Revision 10, May 10, 2012 (pbrown)
     - Rename the formal parameter <interface> used by the functions in this
       extension to <programInterface>.  Certain versions of the Microsoft
       C/C++ compiler and/or its headers cause "interface" to be treated as a
       reserved keyword."

Trivial.
2015-04-16 10:23:24 +01:00
Flora Cui
f78b2c432f gbm: Add GBM_BO_USE_LINEAR flag
Signed-off-by: Flora Cui <flora.cui@amd.com>
Reviewed-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
2015-04-16 15:49:15 +09:00
Tapani Pälli
7c154bbe60 mesa: refactor GetUniformBlockIndex
Use _mesa_program_resource_index to get index.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
1b256eb0ec mesa: refactor GetUniformIndices
Use _mesa_program_resource_index to get indices.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
51313f567d mesa: refactor GetUniformLocation
Use _mesa_program_resource_location to get location.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
45637e9c1f mesa: refactor GetActiveUniformBlockName
Use _mesa_get_program_resource_name to get name.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
284003e1f1 mesa: remove unused _mesa_get_uniform_name
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
8d6fa52e33 mesa: refactor GetActiveUniformName
Use _mesa_get_program_resource_name to get name.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
17dc939f75 mesa: refactor GetActiveUniform
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
dc39d843d2 mesa: refactor GetTransformFeedbackVarying
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
7519ddb4d8 mesa: refactor GetActiveUniformsiv, use _mesa_program_resource_prop
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
2015-04-16 07:55:57 +03:00
Tapani Pälli
34df5ebd77 mesa: mesa_bufferiv utility function for buffer objects
Patch adds new function 'mesa_bufferiv' and refactors existing
GetActiveUniformBlockiv and GetActiveAtomicCounterBufferiv to
use it.

corresponding Piglit tests:
   arb_uniform_buffer_object*
   arb_shader_atomic_counters*

(Many tests hit the corresponding queries.)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
4e7f134f89 mesa: refactor GetFragDataIndex
Use _mesa_program_resource_location_index to fetch index.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
62057c77f1 mesa: refactor GetFragDataLocation
Use program_resource_location to fetch location.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
3d1544cc91 mesa: refactor GetAttribLocation
Use program_resource_location to fetch location.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
26c0394a96 mesa: refactor GetActiveAttrib
Instead of iterating IR, retrieve required information through
the new program resource functions.

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
2015-04-16 07:55:57 +03:00
Tapani Pälli
41c230cd98 mesa: enable GL_ARB_program_interface_query extension
(and mark it as DONE in docs/GL3.txt + 10.6.0 relnotes)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
2ab8de2181 mesa: implementation of glGetProgramResourceiv
Patch adds required helper functions to shaderapi.h and
the actual implementation.

The property query functionality can be tested with tests for
following functions that are refactored by later patches:

   GetActiveAtomicCounterBufferiv
   GetActiveUniformBlockiv
   GetActiveUniformsiv

v2: code cleanup (Ilia Mirkin)
    add bufSize < 0 check and error out
    fix is_resource_referenced to return bool
    check for propCount and bufSize, fixes in buffer_prop

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:57 +03:00
Tapani Pälli
9367ade331 mesa: glGetProgramResourceLocationIndex
Patch adds required helper functions to shaderapi.h and
the actual implementation.

The added functionality can be tested by tests for following
functions that are refactored by later patches:

   GetFragDataIndex

v2: return -1 if output not referenced by fragment stage
    (Ilia Mirkin)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:56 +03:00
Tapani Pälli
e0e4d77f01 mesa: glGetProgramResourceLocation
Patch adds required helper functions to shaderapi.h and
the actual implementation.

corresponding Piglit test:
   arb_program_interface_query-resource-location

The added functionality can be tested by tests for following
functions that are refactored by later patches:

   GetAttribLocation
   GetUniformLocation
   GetFragDataLocation

v2: code cleanup, changes to array element
    syntax checking (Ilia Mirkin)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:56 +03:00
Tapani Pälli
2a5a0d19d6 mesa: glGetProgramResourceName
Patch adds required helper functions to shaderapi.h and
the actual implementation.

Name generation copied from '_mesa_get_uniform_name' which can
be removed later by refactoring functions to use resource list.

The added functionality can be tested by tests for following
functions that are refactored by later patches:

   GetActiveUniformName
   GetActiveUniformBlockName

v2: no index for geometry shader inputs (Ilia Mirkin)
    add bufSize < 0 check and error out
    validate enum

corresponding Piglit test:
   arb_program_interface_query-getprogramresourcename

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.org>
2015-04-16 07:55:56 +03:00
Tapani Pälli
161f57f610 mesa: glGetProgramResourceIndex
Patch adds required helper functions to shaderapi.h and
the actual implementation.

v2: code cleanup (Ilia Mirkin)

corresponding Piglit test:
   arb_program_interface_query-getprogramresourceindex

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.org>
2015-04-16 07:55:56 +03:00
Tapani Pälli
4d3b98bc58 mesa: glGetProgramInterfaceiv
Patch adds required helper functions to shaderapi.h and
the actual implementation.

v2: code cleanup (Ilia Mirkin)
    fix array size fo xfb varyings
    validate programInterface and throw error

v3: put GL_MAX_NUM_COMPATIBLE_SUBROUTINES where
    it belongs

corresponding Piglit test:
   arb_program_interface_query-getprograminterfaceiv

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:56 +03:00
Tapani Pälli
c796ce4108 mesa/glsl: build list of program resources during linking
Patch adds ProgramResourceList to gl_shader_program structure.
List contains references to active program resources and is
constructed during linking phase.

This list will be used by follow-up patches to implement hooks
for GL_ARB_program_interface_query. It can be also used to
implement any of the older shader program query APIs.

v2: code cleanups + note for SSBO and subroutines (Ilia Mirkin)
v3: code cleanups + assert(MESA_SHADER_STAGES < 8) (Martin Peres)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:55:35 +03:00
Tapani Pälli
b297fc27aa glapi: add GL_ARB_program_interface_query skeleton
v2: update dispatch_sanity test (Jason Ekstrand)
    + small code cleanups

v3: xml and Makefile fixes (Ilia Mirkin, Matt Turner)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:30:12 +03:00
Tapani Pälli
993b9b6adb linker: fix varying linking if SSO program has only gs and fs
Previously linker did not take in to account case where one would
have only gs and fs (with SSO), patch adds the case by refactoring
code around assign_varying_locations. This makes sure locations for
gs get populated correctly.

This was found with some of the SSO subtests of Martin's upcoming
GetProgramInterfaceiv Piglit test which passes with the patch, no
Piglit regressions.

v2: code cleanups (Martin Peres)

Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
2015-04-16 07:30:12 +03:00
Glenn Kennard
17d69862a9 r600g/sb: Skip empty ALU clause while scheduling
Fixes assert triggered by
ext_transform_feedback-intervening-read output use_gs
piglit test.

Signed-off-by: Glenn Kennard <glenn.kennard@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2015-04-16 12:43:20 +10:00
Ian Romanick
4cf5ca5ca5 nir: Try commutative sources in CSE
Shader-db results:

GM45 NIR:
total instructions in shared programs: 4082044 -> 4081919 (-0.00%)
instructions in affected programs:     27609 -> 27484 (-0.45%)
helped:                                44

Iron Lake NIR:
total instructions in shared programs: 5678776 -> 5678646 (-0.00%)
instructions in affected programs:     27406 -> 27276 (-0.47%)
helped:                                45

Sandy Bridge NIR:
total instructions in shared programs: 7329995 -> 7329096 (-0.01%)
instructions in affected programs:     142035 -> 141136 (-0.63%)
helped:                                406
HURT:                                  19

Ivy Bridge NIR:
total instructions in shared programs: 6769314 -> 6768359 (-0.01%)
instructions in affected programs:     140820 -> 139865 (-0.68%)
helped:                                423
HURT:                                  2

Haswell NIR:
total instructions in shared programs: 6183693 -> 6183298 (-0.01%)
instructions in affected programs:     96538 -> 96143 (-0.41%)
helped:                                303
HURT:                                  4

Broadwell NIR:
total instructions in shared programs: 7501711 -> 7498170 (-0.05%)
instructions in affected programs:     266403 -> 262862 (-1.33%)
helped:                                705
HURT:                                  5
GAINED:                                4

v2: Rebase on top of Connor's fix.

v3: Convert the if-test for num_inputs == 2 to an assertion.  Suggested
by Jason after some comments / questions by Ilia.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> [v1]
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Cc: Connor Abbott <cwabbott0@gmail.com>
2015-04-15 18:15:59 -07:00
Ian Romanick
8957c9e448 glx: Create proper server dependency for GLX_EXT_create_context_es2_profile
Previously GLX_EXT_create_context_es2_profile was marked as "direct
only" so that it would not depend on server support.  Since the
extension required functions that are part of
GLX_ARB_create_context_profile, support for the EXT was disabled if the
ARB was not supported.

This was complete rubbish.  If the server supported the ARB but not the
EXT, sending a request with GLX_CONTEXT_ES2_PROFILE_BIT_EXT would result
in GLXBadProfileARB.

Instead of the misguided hack, make GLX_EXT_create_context_es2_profile
properly depend on server support by not marking it as "direct only."

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Acked-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Chad Versace <chad.versace@intel.com>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
2015-04-15 18:11:54 -07:00
Eric Anholt
b229e6c7de vc4: Don't try to use color load/stores to blit across format changes.
We could potentially support the right combination of 8888 to 565, but the
important thing for now is to not mix up our orderings of 8888.  Fixes
fbo-copyteximage regressions.
2015-04-15 16:50:23 -07:00
Eric Anholt
cff2e08c4c vc4: Don't try to use color load/stores to do depth/stencil blits.
Fixes regressions in fbo-generatemipmap-formats on depth/stencil (which
does blits to work around baselevel/lastlevel).
2015-04-15 16:50:23 -07:00
Eric Anholt
3a728d4dfb vc4: Update the shadow texture for public textures on every draw.
We don't know who else has written to it, so we'd better update it every
time.  This makes the gears spin in X again.
2015-04-15 16:50:23 -07:00
Eric Anholt
bd957b1b79 vc4: Hook up VC4_DEBUG=perf to some useful printfs. 2015-04-15 16:50:22 -07:00
Brian Paul
e1d095053b st/mesa: log shaders, GLSL info log with _mesa_log()
As with previous patch.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
2015-04-15 16:30:49 -06:00
Brian Paul
011cad806a mesa: log shaders, GLSL info log with _mesa_log()
Now, if we set MESA_LOG_FILE and MESA_GLSL=dump, all the shader info
will get logged to the named file instead of stderr.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
2015-04-15 16:30:49 -06:00
Brian Paul
2926bbfb28 mesa: add _mesa_log(), _mesa_get_log_file() functions
_mesa_log() simply writes log information to stderr or MESA_LOG_FILE.
_mesa_get_log_file() returns the file handle to use for logging.

This will be used for shader dumping/logging instead of always printing
to stderr.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
2015-04-15 16:30:49 -06:00
Brian Paul
11bfee4c3a tgsi: also dump label for TGSI_OPCODE_BGNSUB opcode
So we can see the label associated with subroutines.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
2015-04-15 16:30:49 -06:00
Jose Fonseca
1aa50339d8 st/wgl: Couple of fixes to opengl32.dll's wglCreateContext/wglDeleteContext dispatch.
- Use GetModuleHandle instead of LoadLibrary to avoid incrementing the
  opengl32.dll reference count (otherwise the opengl32.dll will linger
  in memory forever.)

- Ensure we use our fake wglCreateContext/wglDeleteContext when using
  Mesa as a drop-in replacement for opengl32.dll

Untested.  Just noticed by accident.

Reviewed-by: Brian Paul <brianp@vmware.com>
2015-04-15 09:58:38 +01:00
Jose Fonseca
6635fb6cae mesa: Enable _mesa_dlopen on MSVC too.
As pointed out by Shervin Sharifi.

Reviewed-by: Brian Paul <brianp@vmware.com>
2015-04-15 09:58:27 +01:00
Samuel Iglesias Gonsalvez
3cbefe3cf4 glsl: fix assignment of multiple scalar and vecs to matrices.
When a vec has more elements than row components in a matrix, the
code could end up failing an assert inside assign_to_matrix_column().

This patch makes sure that when there is still room in the matrix for
more elements (but in other columns of the matrix), the data is actually
assigned.

This patch fixes the following dEQP test:

  dEQP-GLES3.functional.shaders.conversions.matrix_combine.float_bvec4_ivec2_bool_to_mat4x2_vertex
  dEQP-GLES3.functional.shaders.conversions.matrix_combine.float_bvec4_ivec2_bool_to_mat4x2_fragment

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
2015-04-15 08:11:18 +02:00
Ian Romanick
bc672e261c nir: Fix typo in "ushr by 0" algebraic replacement
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Cc: "10.5" <mesa-stable@lists.freedestkop.org>
2015-04-14 16:41:04 -07:00
Ian Romanick
67a8610caf nir: Silence unused parameter warnings
nir/nir.h: In function 'nir_validate_shader':
nir/nir.h:1567:56: warning: unused parameter 'shader' [-Wunused-parameter]
 static inline void nir_validate_shader(nir_shader *shader) { }
                                                        ^
nir/nir_opt_cse.c: In function 'src_is_ssa':
nir/nir_opt_cse.c:165:32: warning: unused parameter 'data' [-Wunused-parameter]
 src_is_ssa(nir_src *src, void *data)
                                ^
nir/nir_opt_cse.c: In function 'dest_is_ssa':
nir/nir_opt_cse.c:171:35: warning: unused parameter 'data' [-Wunused-parameter]
 dest_is_ssa(nir_dest *dest, void *data)
                                   ^

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
2015-04-14 16:41:04 -07:00
Connor Abbott
47a1b4841d nir/cse: fix bug with comparing non-per-component sources
We weren't comparing the right number of components when checking
swizzles. Use nir_ssa_alu_instr_num_src_components() to do the right
thing.

No piglit regressions, and no fixes either.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Signed-off-by: Connor Abbott <cwabbott0@gmail.com>
2015-04-14 19:07:44 -04:00
Ben Widawsky
b069f9eafd i965/fs: Combine tex/fb_write operations (opt)
Certain platforms support the ability to sample from a texture, and write it out
to the file RT - thus saving a costly send instructions (note that this is a
potnential win if one wanted to backport to a tag that didn't have the patch
from Topi which removed excess MOVs from LOAD_PAYLOAD - 97caf5fa04),

v2: Modify the algorithm. Instead of iterating in reverse through blocks and
insts, since the last block/inst is the only thing which can benefit. Rebased
on top of Ken's patching modifying is_last_send

v3: Rebased over almost 2 months, and Incorporated feedback from Matt:
Some comment typo fixes and rewordings.
Whitespace
Move the optimization pass outside of the optimize loop

v4: Some cosmetic changes requested from Ken. These changes ensured that the
optimization function always returned true when an optimization occurred, and
false when one did not. This behavior did not exist with the original patch. As
a result, having the separate helper function which Matt did not like no longer
made sense, and so now I believe everyone should be happy.

Benchmark (n=20)   %diff
*OglBatch5         -1.4
*OglBatch7         -1.79
OglFillTexMulti    5.57
OglFillTexSingle   1.16
OglShMapPcf        0.05
OglTexFilterAniso  3.01
OglTexFilterTri    1.94

No piglit regressions:
(http://otc-gfxtest-01.jf.intel.com:8080/view/dev/job/bwidawsk/112/)

[*] I believe my measurements are incorrect for Batch5-7. If I add this new
optimization, but never emit the new instruction I see similar results.

v5: Remove declaration of combine_tex_header since v4 dropped that function
(Ben)
Remove check for impossible case of an empty block (Matt)
Set dest earlier to avoid extra special-casing in generate_tex (Matt)

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2015-04-14 15:22:47 -07:00
Ben Widawsky
6866378cf4 i965/fs: Only emit FS_OPCODE_PLACEHOLDER_HALT if there are discards
Based originally on a patch from Ken in May 2014 of the same title. Things
changed enough that I didn't feel comfortable leaving his authorship.

v2: Replace fp->UsesKill with wm_prog_data->uses_kill. Since Ken took the time
to also explain the difference to me, here is his explanation for posterity:

"fp->UsesKill indicates that a ARB_fragment_program shader uses the KIL
instruction, or that a GLSL shader uses the "discard" insntruction
(which are analogous).

On Gen4-5, we sometimes have to simulate OpenGL's "Alpha Test" feature
by emitting shader code that implicitly does a "discard" instruction.

In the key setup, we do:

   /* key->alpha_test_func means simulating alpha testing via discards,
    * so the shader definitely kills pixels.
    */
   prog_data.uses_kill = fp->program.UsesKill || key->alpha_test_func;

Even though the shader may not technically contain a "discard", we need
to act as if it does.

I've also been trying to move the i965 state setup code to use
brw_wm_prog_key for everything, rather than poking at core Mesa's
gl_program/gl_fragment_program/gl_shader/gl_shader_program structures.

--Ken"

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2015-04-14 15:22:47 -07:00