Rob Clark [Sat, 6 Dec 2014 18:36:02 +0000 (13:36 -0500)]
tgsi/lowering: add support to lower TXP (v2)
v2: actually do perspective divide for RECT/SHADOWRECT
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Timothy Arceri [Sat, 6 Dec 2014 13:09:40 +0000 (00:09 +1100)]
mesa: use build flag to ensure stack is realigned on x86
Nowadays GCC assumes stack pointer is 16-byte aligned even on 32-bits, but that is an assumption OpenGL drivers (or any dynamic library for that matter) can't afford to make as there are many closed- and open- source application binaries out there that only assume 4-byte stack alignment.
V4: fix comment and indentation
V3: move all sse4.1 build flag config to the same location
and add comment as to why we need to do the realign
V2: use $target_cpu rather than $host_cpu
and setup build flags in config rather than makefile
https://bugs.freedesktop.org/show_bug.cgi?id=86788
Signed-off-by: Timothy Arceri <t_arceri@yahoo.com.au>
Reviewed-by: Matt Turner <mattst88@gmail.com>
CC: "10.4" <mesa-stable@lists.freedesktop.org>
Marek Olšák [Mon, 17 Nov 2014 21:30:31 +0000 (22:30 +0100)]
draw: implement TGSI_PROPERTY_VS_WINDOW_SPACE_POSITION
Required by Nine. Tested with util_run_tests.
It's added to softpipe, llvmpipe, and r300g/swtcl.
Tested-by: David Heidelberg <david@ixit.cz>
Samuel Iglesias Gonsalvez [Wed, 26 Nov 2014 12:16:38 +0000 (13:16 +0100)]
main: return two minor digits for ES shading language version
For OpenGL ES 3.0 spec, the minor number for SHADING_LANGUAGE_VERSION is always
two digits, matching the OpenGL ES Shading Language Specification release
number. For example, this query might return the string "3.00".
This patch fixes the following dEQP test:
dEQP-GLES3.functional.state_query.string.shading_language_version
No piglit regression observed.
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Samuel Iglesias Gonsalvez [Tue, 25 Nov 2014 11:23:10 +0000 (12:23 +0100)]
glsl: invariant qualifier is not valid for shader inputs in GLSL ES 3.00
GLSL ES 3.00 spec, chapter 4.6.1 "The Invariant Qualifier",
Only variables output from a shader can be candidates for invariance. This
includes user-defined output variables and the built-in output variables.
As only outputs can be declared as invariant, an invariant output from one
shader stage will still match an input of a subsequent stage without the
input being declared as invariant.
This patch fixes the following dEQP tests:
dEQP-GLES3.functional.shaders.qualification_order.variables.valid.invariant_interp_storage_precision
dEQP-GLES3.functional.shaders.qualification_order.variables.valid.invariant_interp_storage
dEQP-GLES3.functional.shaders.qualification_order.variables.valid.invariant_storage_precision
dEQP-GLES3.functional.shaders.qualification_order.variables.valid.invariant_storage
dEQP-GLES3.functional.shaders.qualification_order.variables.invalid.invariant_interp_storage_precision_invariant_input
dEQP-GLES3.functional.shaders.qualification_order.variables.invalid.invariant_interp_storage_invariant_input
dEQP-GLES3.functional.shaders.qualification_order.variables.invalid.invariant_storage_precision_invariant_input
dEQP-GLES3.functional.shaders.qualification_order.variables.invalid.invariant_storage_invariant_input
No piglit regressions observed.
v2:
- Add spec content in the code
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Iago Toral Quiroga [Tue, 2 Dec 2014 11:10:14 +0000 (12:10 +0100)]
mesa: Recompute LegalTypesMask if the GL API has changed
The current code computes ctx->Array.LegalTypesMask just once,
however, computing this needs to consider ctx->API so we need
to make sure that the API for that context has not changed if
we intend to reuse the result.
The context API can change, at least, if we go through
_mesa_meta_begin, since that will always force
API_OPENGL_COMPAT until we call _mesa_meta_end. If any
operation in between these two calls triggers a call to
update_array_format, then we might be caching a value for
LegalTypesMask that will not be right once we have called
_mesa_meta_end and restored the context API.
Fixes the following 179 dEQP tests in i965:
dEQP-GLES3.functional.vertex_arrays.single_attribute.strides.fixed.*
dEQP-GLES3.functional.vertex_arrays.single_attribute.normalize.fixed.*
dEQP-GLES3.functional.vertex_arrays.single_attribute.output_types.fixed.*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.static_draw.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.stream_draw.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.dynamic_draw.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.static_copy.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.stream_copy.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.dynamic_copy.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.static_read.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.stream_read.*fixed*
dEQP-GLES3.functional.vertex_arrays.single_attribute.usages.dynamic_read.*fixed*
dEQP-GLES3.functional.vertex_arrays.multiple_attributes.input_types.3_*fixed2*
dEQP-GLES3.functional.draw.random.{2,18,28,68,83,106,109,156,181,191}
Reviewed-by: Brian Paul <brianp@vmware.com>
Eduardo Lima Mitev [Thu, 20 Nov 2014 13:52:35 +0000 (14:52 +0100)]
mesa: Returns zero samples when querying GL_NUM_SAMPLE_COUNTS when internal format is integer
From GL ES 3.0 specification, section 6.1.15 Internal Format Queries (page 236),
multisampling is not supported for signed and unsigned integer internal formats.
Fixes 19 dEQP tests under 'dEQP-GLES3.functional.state_query.internal_format.*'.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Eduardo Lima Mitev [Thu, 20 Nov 2014 13:02:46 +0000 (14:02 +0100)]
mesa: Enables GL_RGB and GL_RGBA unsized internal formats for OpenGL ES 3.0
GL_RGB and GL_RGBA are valid internal formats on a GLES3 profile. See
"Table 1. Unsized Internal Formats" at
https://www.khronos.org/opengles/sdk/docs/man3/html/glTexImage2D.xhtml.
Fixes 2 dEQP tests:
- dEQP-GLES3.functional.state_query.internal_format.rgb_samples
- dEQP-GLES3.functional.state_query.internal_format.rgba_samples
Reviewed-by: Brian Paul <brianp@vmware.com>
Eduardo Lima Mitev [Tue, 18 Nov 2014 15:28:18 +0000 (16:28 +0100)]
mesa: Considers GL_DEPTH_STENCIL_ATTACHMENT a valid argument for FBO invalidation under GLES3
In OpenGL and OpenGL-ES 3+, GL_DEPTH_STENCIL_ATTACHMENT is a valid attachment point for the family of functions
that invalidate a framebuffer object (e.g, glInvalidateFramebuffer, glInvalidateSubFramebuffer, etc).
Currently, a GL_INVALID_ENUM error is emitted for this attachment point.
Fixes 21 dEQP test failures under 'dEQP-GLES3.functional.fbo.invalidate.*'.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Eric Anholt [Tue, 9 Dec 2014 00:52:53 +0000 (16:52 -0800)]
vc4: Reserve rb31 instead of r3 for raddr conflict spills.
This increases the cost of a raddr b conflict spill (save r3 to rb31, move
src1 to r3, move rb31 back to r3 when done, instead of just move src1 to
r3), but on average thanks to instruction pairing it's more worthwhile to
have another accumulator.
total instructions in shared programs: 46428 -> 46171 (-0.55%)
instructions in affected programs: 38030 -> 37773 (-0.68%)
Eric Anholt [Tue, 9 Dec 2014 01:43:29 +0000 (17:43 -0800)]
vc4: Prioritize allocating accumulators to short-lived values.
The register allocator walks from the end of the nodes array looking for
trivially-allocatable things to put on the stack, meaning (assuming
everything is trivially colorable and gets put on the stack in a single
pass) the low node numbers get allocated first. The things allocated
first happen to get the lower-numbered registers, which is to say the fast
accumulators that can be paired more easily.
When we previously made the nodes match the temporary register numbers,
we'd end up putting the shader inputs (VS or FS) in the accumulators,
which are often long-lived values. By prioritizing the shortest-lived
values for allocation, we can get a lot more instructions that involve
accumulators, and thus fewer conflicts for raddr and WS.
total instructions in shared programs: 52870 -> 46428 (-12.18%)
instructions in affected programs: 52260 -> 45818 (-12.33%)
Dave Airlie [Tue, 9 Dec 2014 01:28:52 +0000 (11:28 +1000)]
r600g: fix regression since UCMP change
Since
d8da6deceadf5e48201d848b7061dad17a5b7cac where the
state tracker started using UCMP on cayman a number of tests
regressed.
this seems to be r600g is doing CNDGE_INT for UCMP which is >= 0,
we should be doing CNDE_INT with reverse arguments.
Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Matt Turner [Mon, 8 Dec 2014 21:44:40 +0000 (13:44 -0800)]
program: Delete dead _mesa_realloc_instructions.
Dead since 2010 (commit
284ce209).
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Thu, 4 Dec 2014 19:34:35 +0000 (11:34 -0800)]
swrast: Remove 'inline' from tex filter functions.
Reduces .text size of mesa_dri_drivers.so (i965-only) by 62k, or 1.4%.
Note that we don't remove inline from lerp_2d(), which has a comment
above it saying it definitely should be inlined. Though, removing the
inline keyword from it doesn't actually change the compiled code for me.
Reviewed-by: Brian Paul <brianp@vmware.com>
Matt Turner [Mon, 22 Sep 2014 04:24:01 +0000 (21:24 -0700)]
Don't cast the return value of malloc/realloc
See commit
2b7a972e for the Coccinelle script.
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Mon, 22 Sep 2014 04:15:26 +0000 (21:15 -0700)]
Use calloc instead of malloc/memset-0
See commit
6bda027e for the Coccinelle script.
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Mon, 22 Sep 2014 04:13:33 +0000 (21:13 -0700)]
Remove useless checks for NULL before freeing
See commits
5067506e and
b6109de3 for the Coccinelle script.
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Kristian Høgsberg [Mon, 22 Sep 2014 11:44:19 +0000 (04:44 -0700)]
i965/skl: Add Skylake PCI IDs
Signed-off-by: Kristian Høgsberg <krh@bitplanet.net>
Damien Lespiau [Wed, 27 Feb 2013 15:05:24 +0000 (15:05 +0000)]
i965/skl: Emit depth stall workaround for gen9 as well
The docs say that we shouldn't need this workaround for gen8+, but just
removing it, causes gpu hangs. We'll revisit this, but for now, just
extend the workaround to gen9.
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Ben Widawsky [Wed, 3 Dec 2014 23:53:29 +0000 (15:53 -0800)]
i965/skl: Fix GS thread count location
SKL moves the GS threadcount to dw8 from dw7, and no longer does the
divide by 2 thing.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
Tested-by: Kristian Høgsberg <krh@bitplanet.net>
Vinson Lee [Sat, 6 Dec 2014 02:05:06 +0000 (18:05 -0800)]
i965: Fix union usage for G++ <= 4.6.
This patch fixes this build error with G++ <= 4.6.
CXX test_vf_float_conversions.o
test_vf_float_conversions.cpp: In function ‘unsigned int f2u(float)’:
test_vf_float_conversions.cpp:63:20: error: expected primary-expression before ‘.’ token
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86939
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Eric Anholt [Sat, 6 Dec 2014 01:08:28 +0000 (17:08 -0800)]
vc4: Interleave register allocation from regfile A and B.
The register allocator prefers low-index registers from vc4_regs[] in the
configuration we're using, which is good because it means we prioritize
allocating the accumulators (which are faster). On the other hand, it was
causing raddr conflicts because everything beyond r0-r2 ended up in
regfile A until you got massive register pressure. By interleaving, we
end up getting more instruction pairing from getting non-conflicting
raddrs and QPU_WSes.
total instructions in shared programs: 55957 -> 52719 (-5.79%)
instructions in affected programs: 46855 -> 43617 (-6.91%)
Eric Anholt [Mon, 8 Dec 2014 19:27:50 +0000 (11:27 -0800)]
vc4: Fix decision for whether the MIN operation writes to the B regfile.
Eric Anholt [Sun, 7 Sep 2014 21:38:24 +0000 (14:38 -0700)]
vc4: Drop dependency on r3 for color packing.
We can avoid it by carefully ordering the packing. This is important as a
step in giving r3 to the register allocator.
total instructions in shared programs: 56087 -> 55957 (-0.23%)
instructions in affected programs: 18368 -> 18238 (-0.71%)
Eric Anholt [Mon, 8 Dec 2014 20:40:58 +0000 (12:40 -0800)]
vc4: Add support for GL 1.0 logic ops.
Eric Anholt [Mon, 8 Dec 2014 19:57:15 +0000 (11:57 -0800)]
vc4: Add support for TGSI_OPCODE_UCMP.
This is being emitted now from st_glsl_to_tgsi.cpp.
Tom Stellard [Fri, 5 Dec 2014 23:59:11 +0000 (23:59 +0000)]
radeonsi/compute: Clamp COMPUTE_TMPRING_SIZE.WAVES to: num_cu * 32
This is the maximum value allowed for this field.
Tom Stellard [Fri, 5 Dec 2014 23:59:10 +0000 (23:59 +0000)]
winsys/radeon: Always report at least 1 compute unit
All uses of this require that the value be at least one, so it's
easier to report at least one than having to wrap all uses
in MAX2(max_compute_units, 1).
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Tom Stellard [Tue, 9 Sep 2014 19:18:57 +0000 (15:18 -0400)]
radeonsi: Program RASTER_CONFIG for harvested GPUs v5
Harvested GPUs have some of their render backends disabled, so
in order to prevent the hardware from trying to render things
with these disabled backends we need to correctly program
the PA_SC_RASTER_CONFIG register.
v2:
- Write RASTER_CONFIG for all SEs.
v3:
- Set GRBM_GFX_INDEX.INSTANCE_BROADCAST_WRITES bit.
- Set GRBM_GFX_INFEX.SH_BROADCAST_WRITES bit when done setting
PA_SC_RASTER_CONFIG.
- Get num_se and num_sh_per_se from kernel.
v4:
- Get correct value for num_se
- Remove loop for setting PA_SC_RASTER_CONFIG
- Only compute raster config when a backend has been disabled.
v5: Michel Dänzer
- Fix computation for chips with multiple SEs
https://bugs.freedesktop.org/show_bug.cgi?id=60879
CC: "10.4 10.3" <mesa-stable@lists.freedesktop.org>
Roland Scheidegger [Mon, 8 Dec 2014 18:07:10 +0000 (19:07 +0100)]
draw: (trivial): remove double semicolon
Abdiel Janulgue [Mon, 1 Dec 2014 12:59:08 +0000 (14:59 +0200)]
st/mesa: For vertex shaders, don't emit saturate when SM 3.0 is unsupported
There is a bug in the current lowering pass implementation where we lower saturate
to clamp only for vertex shaders on drivers supporting SM 3.0. The correct behavior
is to actually lower to clamp only when we don't support saturate which happens
on drivers that don't support SM 3.0
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Abdiel Janulgue [Mon, 8 Dec 2014 11:31:29 +0000 (13:31 +0200)]
glsl: Don't optimize min/max into saturate when EmitNoSat is set
v3: Fix multi-line comment format (Ian)
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Abdiel Janulgue [Mon, 8 Dec 2014 11:26:28 +0000 (13:26 +0200)]
ir_to_mesa: Remove sat to clamp lowering pass
Fixes an infinite loop in swrast where the lowering pass unpacks saturate into
clamp but the opt_algebraic pass tries to do the opposite.
v3 (Ian):
This is a revert of commit
cfa8c1cb "ir_to_mesa: lower ir_unop_saturate" on
the ir_to_mesa.cpp portion. prog_execute.c can handle saturates in vertex
shaders, so classic swrast shouldn't need this lowering pass.
Cc: "10.4" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83463
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Michael Forney [Sun, 7 Dec 2014 08:51:00 +0000 (00:51 -0800)]
loader: Add missing EXPAT_CFLAGS to libloader.la CPPFLAGS
Reviewed-by: Matt Turner <mattst88@gmail.com>
Matt Turner [Sat, 6 Dec 2014 22:18:21 +0000 (14:18 -0800)]
i965: Remove default from brw_instruction_name switch to catch missing names.
The case-range extension is available in clang and gcc at least back to
3.4.0.
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Matt Turner [Sat, 6 Dec 2014 22:16:13 +0000 (14:16 -0800)]
i965: Add missing opcode names.
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Matt Turner [Sat, 6 Dec 2014 21:34:13 +0000 (13:34 -0800)]
i965: Add opcode names for set_omask and set_sample_id.
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Chad Versace [Thu, 20 Nov 2014 18:26:38 +0000 (10:26 -0800)]
egl: Expose EGL_KHR_get_all_proc_addresses and its client extension
Mesa already implements the behavior of EGL_KHR_get_all_proc_addresses
and EGL_KHR_client_get_all_proc_addresses. This patch just exposes the
extension strings.
See: https://www.khronos.org/registry/egl/extensions/KHR/EGL_KHR_get_all_proc_addresses.txt
Signed-off-by: Chad Versace <chad.versace@linux.intel.com>
Emil Velikov [Fri, 5 Dec 2014 19:10:39 +0000 (19:10 +0000)]
docs: add news item and link release notes for mesa 10.3.5
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Emil Velikov [Fri, 5 Dec 2014 18:43:47 +0000 (18:43 +0000)]
docs: Add sha256 sums for the 10.3.5 release
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit
1ba2029184d3e7b013e3fc322e80a761604495d4)
Emil Velikov [Fri, 5 Dec 2014 18:21:51 +0000 (18:21 +0000)]
Add release notes for the 10.3.5 release
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
(cherry picked from commit
c90b0db1aef8f439b52b38ad58aac4ca202232a7)
Ilia Mirkin [Thu, 4 Dec 2014 03:12:39 +0000 (22:12 -0500)]
freedreno/a2xx: silence warning about missing DEPTH32X
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Thu, 4 Dec 2014 05:45:45 +0000 (00:45 -0500)]
freedreno/a3xx: handle index_bias (i.e. base_vertex)
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Thu, 4 Dec 2014 01:43:22 +0000 (20:43 -0500)]
freedreno/a3xx: add bgr565 texturing and rendering
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Fri, 28 Nov 2014 19:10:50 +0000 (14:10 -0500)]
freedreno/a3xx: add support for SRGB render targets
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Tue, 2 Dec 2014 06:00:47 +0000 (01:00 -0500)]
freedreno/a3xx: output RGBA16_FLOAT from fs for certain outputs
Fixes R11G11B10F rendering, and is required for SRGB format support.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Wed, 3 Dec 2014 02:31:33 +0000 (21:31 -0500)]
freedreno/a3xx: re-enable rgb10_a2 render targets
There were previously regressions regarding border colors, which the
updated swizzle logic resolves.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Wed, 3 Dec 2014 04:27:03 +0000 (23:27 -0500)]
freedreno/a3xx: fix border color swizzle to match texture format desc
This is a hack since it uses the texture information together with the
sampler, but I don't see a better way to do it. In OpenGL, there is a
1:1 correspondence.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Wed, 3 Dec 2014 02:32:01 +0000 (21:32 -0500)]
freedreno/a3xx: fix alpha-blending on RGBX formats
Expert debugging assistance provided by Chris Forbes.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Chris Forbes [Sat, 6 Dec 2014 22:49:28 +0000 (11:49 +1300)]
glcpp: Fix `can not` to `cannot` in error message
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Chris Forbes [Sat, 29 Nov 2014 20:54:59 +0000 (09:54 +1300)]
glcpp: Disallow undefining GL_* builtin macros.
Fixes the piglit test: spec/glsl-es-3.00/compiler/undef-GL_ES.vert
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Chris Forbes [Fri, 5 Dec 2014 06:43:13 +0000 (19:43 +1300)]
i965/Gen6-7: Fix point sprites with PolygonMode(GL_POINT)
This was an oversight in the original patch. When PolygonMode is
used, then front faces, back faces, or both may be rendered as
points and are affected by point sprite state.
Note that SNB/IVB can't actually be fully conformant here, for
a legacy context -- we don't have separate sets of pointsprite
enables for front and back faces. Haswell ignores pointsprite
state correctly in hardware for non-point rasterization, so can
do this correctly, but it doesn't seem worth it.
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Cc: "10.4" <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86764
Reviewed-by: Matt Turner <mattst88@gmail.com>
Chris Forbes [Sat, 6 Dec 2014 21:12:36 +0000 (10:12 +1300)]
i965: Fix regs read for FS_OPCODE_INTERP_PER_SLOT_OFFSET
Dead code elimination was eating the Y offset.
Fixes the piglit test:
spec/ARB_gpu_shader5/arb_gpu_shader5-interpolateAtOffset-nonconst
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Chris Forbes [Sat, 6 Dec 2014 21:07:16 +0000 (10:07 +1300)]
i965: Add opcode names for FS interpolation opcodes
Signed-off-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Roland Scheidegger [Fri, 5 Dec 2014 22:08:34 +0000 (23:08 +0100)]
mesa/st: don't use CMP / I2F for conditional assignments with native integers
The original idea was to optimize away the condition by integrating it directly
into the CMP instruction. However, with native integers this requires an extra
I2F instruction. It is also fishy because the negation used didn't really honor
ieee754 float comparison rules, not to mention the CMP instruction itself
(being pretty much a legacy instruction) doesn't really have defined special
float value behavior in any case.
So, use UCMP and adjust the code trying to optimize the condition away
accordingly (I have absolutely no idea if such conditions are actually hit
or would be translated away somewhere else already).
v2: cosmetic changes
No piglit regressions on llvmpipe.
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Roland Scheidegger [Wed, 3 Dec 2014 02:57:15 +0000 (03:57 +0100)]
llvmpipe: decrease MAX_SCENES from 2 to 1
Multiple scenes per context are meant to be used so a new scene can be built
while another one is processed in rasterization. However, quite surprisingly,
this does not actually work (and according to git log, possibly never did,
though maybe it did at some point further back (5 years+) but was buggy)
because we always wait immediately on the rasterizer to finish the scene when
contexts (and hence setup/scene) is flushed. This means when we try to get
an empty scene later, any old one is already empty again.
Thus using multiple scenes is just a waste of memory (not too bad, since the
additional scenes are guaranteed to be empty, which means their size ought to
be one data block (64kB) plus the size of some structs), without actually
really doing anything. (There is also quite some code for the whole concept of
multiple scenes which doesn't really do much in practice, but keep it hoping
the wait-on-scene-flush can be fixed some day.)
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Roland Scheidegger [Tue, 2 Dec 2014 01:27:56 +0000 (02:27 +0100)]
draw: use the prim type from prim_info not emit in passthrough emit
The prim assembler may change the prim type when injecting prim ids now,
which isn't reflected by what's stored in emit.
This looks brittle and potentially dangerous (it is not obvious if such prim
type changes are really supported by pt emit, the prim type is actually also
set in prepare which would then be different).
This fixes piglit primitive-id-no-gs-first-vertex.shader_test.
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Roland Scheidegger [Mon, 1 Dec 2014 22:40:31 +0000 (23:40 +0100)]
draw: use correct output prim for non-adjacent topologies in prim assembler.
The decomposition done in the prim assembler will turn tri fans into tris,
but this wasn't reflected in the output prim type. Meaning with a tri fan
with 6 verts input, the output was a tri fan with 12 vertices instead of a
tri list with 12 vertices (not as bad as it sounds, since the additional tris
created would all be degenerate since they'd all have two times vertex zero
but still bogus).
This is because the prim assembler is used if either the input topology is
something with adjacency, or if prim id needs to be injected, and for the
latter case topologies without adjacency can be converted to basic ones.
Unfortunately decomposition here for inserting prim ids is necessary, at
least for the indexed case where we can't just insert the prim id at the
right place depending on provoking vertex.
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Roland Scheidegger [Mon, 1 Dec 2014 22:13:55 +0000 (23:13 +0100)]
draw: kill off unneded prim assembler code for handling adjacency verts
The default macros when the adjacency macros aren't defined will already
exactly do that (that is, drop the adjacent vertices and call the non-adjacent
macro).
Reviewed-by: Jose Fonseca <jfonseca@vmwarec.com>
Roland Scheidegger [Mon, 1 Dec 2014 16:03:47 +0000 (17:03 +0100)]
gallium/docs: (trivial) remove STR opcode description.
The opcode was removed alongside SFL by commit
ecfe9e2ad2b5f178ef09420f8d95d49937137cd9.
Matt Turner [Thu, 3 Apr 2014 21:29:30 +0000 (14:29 -0700)]
i965/fs: Perform CSE on MOV ..., VF instructions.
Safe from causing optimization loops, since we don't constant propagate
VF arguments.
(for this and the previous patch):
total instructions in shared programs:
4289075 ->
4271932 (-0.40%)
instructions in affected programs:
1616779 ->
1599636 (-1.06%)
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Tue, 1 Apr 2014 23:49:13 +0000 (16:49 -0700)]
i965/fs: Try to emit LINE instructions on Gen <= 5.
The LINE instruction performs a multiply-add instruction (a * b + c)
where b and c are scalar arguments. It reads b and c from offsets in
src0 such that you can load them (it they're representable) as a
vector-float immediate with a single instruction.
Hurts some programs, but that'll all get better once we CSE the
vector-float MOVs in the next patch.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=77544
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Wed, 2 Apr 2014 00:25:12 +0000 (17:25 -0700)]
i965/fs: Add support for generating the LINE instruction.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Tue, 19 Aug 2014 06:14:44 +0000 (23:14 -0700)]
i965: Set the region of LINE's src0 to <0,1,0>.
The PRMs say that
<src0> region must be a replicated scalar
(with HorzStride = VertStride = 0).
but apparently that doesn't actually apply to all generations. I did
notice when implementing the optimization later in this series that G45
and ILK needed this regioning.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Fri, 14 Nov 2014 20:46:44 +0000 (12:46 -0800)]
i965: Give compile stats through KHR_debug.
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Fri, 14 Nov 2014 01:35:58 +0000 (17:35 -0800)]
mesa: Add a source parameter to _mesa_gl_debug.
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Eric Anholt [Fri, 5 Dec 2014 21:23:17 +0000 (13:23 -0800)]
vc4: Try swapping the regfile A to B to pair instructions.
total instructions in shared programs: 56995 -> 56087 (-1.59%)
instructions in affected programs: 40503 -> 39595 (-2.24%)
Eric Anholt [Fri, 5 Dec 2014 20:34:30 +0000 (12:34 -0800)]
vc4: Allow pairing of some instructions that disagree about the WS bit.
No difference on shader-db because we tend to have a lot of other
conflicts going on as well (like RADDR_A disagreements)
Matt Turner [Fri, 5 Dec 2014 21:06:01 +0000 (13:06 -0800)]
configure.ac: Replace contraction to fix syntax highlighting.
Ben Widawsky [Thu, 4 Dec 2014 23:37:17 +0000 (15:37 -0800)]
i965/gs: Avoid DW * DW mul
The GS has an interesting use for mul. Because the GS can emit multiple
vertices per input vertex, and it also has a unique count at the top of the URB
payload, the GS unit needs to be able to dynamically specify URB write offsets
(relative to the global offset). The documentation in the function has a very
good explanation from Paul on the mechanics.
This fixes around 2000 piglit tests on BSW.
v2:
Reworded commit message (Ben) no mention of CHV (Matt)
Change SHRT_MAX to USHRT_MAX (Ken, and Matt)
Update comment in code to reflect the use of UW (Ben)
Add Gen7+ assertion for the relevant GS code, since it won't work on Gen6- (Ken)
Drop the bogus hunk in emit_control_data_bits() (Ken)
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=84777 (with many dupes)
Cc: "10.4 10.3 10.2" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Eric Anholt [Tue, 2 Dec 2014 23:42:58 +0000 (15:42 -0800)]
vc4: Add separate write-after-read dependency tracking for pairing.
If an operation is the last one to read a register, the instruction
containing it can also include the op that has the next write to that
register.
total instructions in shared programs: 57486 -> 56995 (-0.85%)
instructions in affected programs: 43004 -> 42513 (-1.14%)
Eric Anholt [Wed, 3 Dec 2014 00:31:29 +0000 (16:31 -0800)]
vc4: Fix inverted priority of instructions for QPU scheduling.
We were scheduling TLB operations as early as possible, and texture setup
as late as possible. When I introduced prioritization, I visually
inspected that an independent operation got moved above texture results
collection, which tricked me into thinking it was working (but it was just
because texture setup was being pushed late).
total instructions in shared programs: 57651 -> 57486 (-0.29%)
instructions in affected programs: 18532 -> 18367 (-0.89%)
Eric Anholt [Wed, 3 Dec 2014 00:23:40 +0000 (16:23 -0800)]
vc4: Refuse to merge two ops that both access shared functions.
Avoids assertion failures in vc4_qpu_validate.c if we happen to find the
right set of operations available.
Eric Anholt [Tue, 2 Dec 2014 20:58:27 +0000 (12:58 -0800)]
vc4: Allow dead code elimination of color reads.
This might happen if the blending functions are set up to not actually use
the destination color/alpha, for example.
Eric Anholt [Tue, 2 Dec 2014 21:18:56 +0000 (13:18 -0800)]
vc4: Add a debug flag for waiting for sync on submit.
This is nice when you're tracking down which command list is hanging the
GPU.
Matt Turner [Fri, 5 Dec 2014 17:53:11 +0000 (09:53 -0800)]
i965/fs: Move brw_file_from_reg() higher in the file.
This was supposed to be part of the previous commit.
Matt Turner [Fri, 28 Nov 2014 20:21:03 +0000 (12:21 -0800)]
i965/fs: Make brw_reg_from_fs_reg static and remove prototype.
And move it above its first use in brw_fs_generator.cpp.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Matt Turner [Tue, 2 Dec 2014 20:28:13 +0000 (12:28 -0800)]
i965: Use ~0 to represent true on all generations.
Jason realized that we could fix the result of the CMP instruction on
Gen <= 5 by doing -(result & 1). Also do the resolves in the vec4
backend before use, rather than when the bool was created. The FS does
this and it saves some unnecessary resolves.
On Ironlake:
total instructions in shared programs:
4289762 ->
4287277 (-0.06%)
instructions in affected programs: 619430 -> 616945 (-0.40%)
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Matt Turner [Tue, 2 Dec 2014 20:30:27 +0000 (12:30 -0800)]
i965: Change the type of booleans to D.
This is a revert of commit
4656c14e ("i965/fs: Change the type of
booleans to UD and emit correct immediates") plus some small additional
fixes, like casting ctx->Const.UniformBooleanTrue to int and changing UD
to D in the ir_unop_b2f cases. Note that it's safe to leave 0x3f800000
as UD and as a literal it's more recognizable than
1065353216.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Matt Turner [Thu, 4 Dec 2014 21:35:25 +0000 (13:35 -0800)]
i965/fs: Add a negate() function.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Matt Turner [Thu, 4 Dec 2014 07:32:30 +0000 (23:32 -0800)]
i965/vec4: Don't DCE flag-writing insts because dest was unused.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Matt Turner [Fri, 24 Oct 2014 06:22:09 +0000 (23:22 -0700)]
i965/vec4: Allow CSE on uniform-vec4 expansion MOVs.
Three source instructions cannot directly source a packed vec4 (<0,4,1>
regioning) like vec4 uniforms, so we emit a MOV that expands the vec4 to
both halves of a register.
If these uniform values are used by multiple three-source instructions,
we'll emit multiple expansion moves, which we cannot combine in CSE
(because CSE emits moves itself).
So emit a virtual instruction that we can CSE.
Sometimes we demote a uniform to to a pull constant after emitting an
expansion move for it. In that case, recognize in opt_algebraic that if
the .file of the new instruction is GRF then it's just a real move that
we can copy propagate and such.
total instructions in shared programs:
5822418 ->
5812335 (-0.17%)
instructions in affected programs: 351841 -> 341758 (-2.87%)
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Matt Turner [Fri, 22 Aug 2014 21:30:38 +0000 (14:30 -0700)]
glsl: Optimize scalar all_equal/any_nequal into equal/nequal.
Cuts an instruction from two shaders in Tesseract, by allowing the
(x+y) cmp 0 -> x cmp -y optimization to take place.
instructions in affected programs: 1198 -> 1194 (-0.33%)
Reviewed-by: Eric Anholt <eric@anholt.net>
José Fonseca [Tue, 2 Dec 2014 20:20:43 +0000 (20:20 +0000)]
mesa: Ensure stack is realigned on x86.
Nowadays GCC assumes stack pointer is 16-byte aligned even on 32-bits,
but that is an assumption OpenGL drivers (or any dynamic library for
that matter) can't afford to make as there are many closed- and open-
source application binaries out there that only assume 4-byte stack
alignment.
This fix uses force_align_arg_pointer GCC attribute, and is only a
stop-gap measure.
The right fix would be to pass -mstackrealign or
-mincoming-stack-boundary=2 to all source fails that use any -msse*
option, as there is no way to guarantee if/when GCC will decide to spill
SSE registers to the stack.
https://bugs.freedesktop.org/show_bug.cgi?id=86788
Reviewed-by: Brian Paul <brianp@vmware.com>
José Fonseca [Fri, 5 Dec 2014 14:15:02 +0000 (14:15 +0000)]
util/primconvert: Avoid point arithmetic; apply offset on all cases.
Matches what u_vbuf_get_minmax_index() does.
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
Ilia Mirkin [Thu, 4 Dec 2014 23:56:36 +0000 (18:56 -0500)]
util/primconvert: take ib offset into account
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.4 10.3" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Sun, 30 Nov 2014 06:20:01 +0000 (01:20 -0500)]
util/primconvert: support instanced rendering
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.3 10.4" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Ilia Mirkin [Thu, 4 Dec 2014 05:36:00 +0000 (00:36 -0500)]
util/primconvert: pass index bias through
The index_bias (aka base_vertex) applies to the downstream draw just as
much, since the actual index values are never modified.
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.3 10.4" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Rob Clark <robclark@freedesktop.org>
Kenneth Graunke [Wed, 3 Dec 2014 22:26:48 +0000 (14:26 -0800)]
i965: Compute VS attribute WA bits earlier and check if they changed.
BRW_NEW_VERTICES is flagged every time we draw a primitive. Having
the brw_vs_prog atom depend on BRW_NEW_VERTICES meant that we had to
compute the VS program key and do a program cache lookup for every
single primitive. This is painfully expensive.
The workaround bit computation is almost entirely based on the vertex
attribute arrays (brw->vb.inputs[i]), which are set by brw_merge_inputs.
The only thing it uses the VS program for is to see which VS inputs are
actually read. brw_merge_inputs() happens once per primitive, and can
safely look at the currently bound vertex program, as it doesn't change
in the middle of a draw.
This patch moves the workaround bit computation to brw_merge_inputs(),
right after assigning brw->vb.inputs[i], and stores the previous WA bit
values in the context. If they've actually changed from the last draw
(which is uncommon), we signal that we need a new vertex program,
causing brw_vs_prog to compute a new key.
Improves performance in Gl32Batch7 by 13.6123% +/- 0.739652% (n=166)
on Haswell GT3e. I'm told Baytrail shows similar gains.
v2: Introduce a new BRW_NEW_VS_ATTRIB_WORKAROUNDS dirty bit, rather
than reusing BRW_NEW_VERTEX_PROGRAM (suggested by Chris Forbes).
This prevents unnecessary re-emission of surface/sampler related
atoms (and an SOL atom on Sandybridge).
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Matt Turner [Thu, 4 Dec 2014 00:32:39 +0000 (16:32 -0800)]
egl/dri2: Log a warning if no platforms are enabled.
If you hit this, you didn't compile with --with-egl-platforms=...
Recompile with something like --with-egl-platforms=x11,drm and make
clean and make again.
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Kenneth Graunke [Mon, 1 Dec 2014 05:26:43 +0000 (21:26 -0800)]
i965: Drop BRW_NEW_VERTEX_PROGRAM and _NEW_TRANSFORM from Gen4 VS state.
These stopped being necessary in commit
ab973403e445cd8211dba4e87e0.
v2: Update commit message with a better explanation (thanks to Eric
Anholt for doing the git archaeology).
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Kenneth Graunke [Sun, 30 Nov 2014 10:11:29 +0000 (02:11 -0800)]
i965: Drop BRW_NEW_VERTEX_PROGRAM from Gen7+ 3DSTATE_VS atoms.
We don't access brw->vertex_program or ctx->_Shader since the previous
commit, so we don't need this dirty bit.
I think it's still necessary on Gen6 because it still conflates
constant uploading with unit state uploading. We can fix that later.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Kenneth Graunke [Sun, 30 Nov 2014 09:35:14 +0000 (01:35 -0800)]
i965: Store floating point mode choice in brw_stage_prog_data.
We use IEEE mode for GLSL programs, but need to use ALT mode for ARB
programs so that 0^0 == 1. The choice is based entirely on the shader
source language.
Previously, our code to determine which mode we wanted was duplicated
in 8 different places (VS and FS for Gen4-5, Gen6, Gen7, and Gen8).
The ctx->_Shader->CurrentProgram[stage] == NULL check was confusing
as well - we use CurrentProgram (non-derived state), but _Shader
(derived state). It also relies on knowing that ARB programs don't
use gl_shader_program structures today. The compiler already makes
this assumption in a few places, but I'd rather keep that assumption
out of the state upload code.
With this patch, we select the mode at compile time, and store that
choice in prog_data. The state upload code simply uses that decision.
This eliminates a BRW_NEW_*_PROGRAM dependency in the state upload code.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Kenneth Graunke [Sun, 30 Nov 2014 09:41:15 +0000 (01:41 -0800)]
i965: Make Gen4-5 and Gen8+ ALT checks use ctx->_Shader too.
Commit
c0347705 changed the Gen6-7 code to use ctx->_Shader rather than
ctx->Shader, but neglected to change the Gen4-5 or Gen8+ code.
This might fix SSO related bugs, but ALT mode is only used for ARB
programs, so if there's an actual problem, it's likely no one would
run into it.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Kenneth Graunke [Sun, 30 Nov 2014 09:14:17 +0000 (01:14 -0800)]
i965: Move PSCDEPTH calculations from draw time to compile time.
The "Pixel Shader Computed Depth Mode" value is entirely based on the
shader program, so we can easily do it at compile time. This avoids the
if+switch on every 3DSTATE_WM (Gen7)/3DSTATE_PS_EXTRA (Gen8+) upload,
and shares a bit more code.
This also simplifies the PMA stall code, making it match the formula
more closely, and drops a BRW_NEW_FRAGMENT_PROGRAM dependency. (Note
that the previous comment was wrong - the code and the documentation
have != PSCDEPTH_OFF, not ==.)
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Rob Clark [Wed, 3 Dec 2014 23:47:39 +0000 (18:47 -0500)]
freedreno/a4xx: unify vertex/texture formats into a single table
Similar to the scheme that Ilia put in place for a3xx.
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Rob Clark [Wed, 3 Dec 2014 23:02:38 +0000 (18:02 -0500)]
freedreno/a4xx: fd4_util -> fd4_format
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Rob Clark [Wed, 3 Dec 2014 22:54:36 +0000 (17:54 -0500)]
freedreno: update generated headers / a4xx fmt rename
Signed-off-by: Rob Clark <robclark@freedesktop.org>
Kenneth Graunke [Mon, 1 Dec 2014 21:44:04 +0000 (13:44 -0800)]
i965: Add var->location != -1 assertions.
We shouldn't receive variables with invalid locations set - adding these
assertions should help catch problems before they cause crashes later.
Inspired by similar code in st_glsl_to_tgsi.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Matt Turner [Fri, 29 Aug 2014 21:41:21 +0000 (14:41 -0700)]
i965/fs: Don't offset uniform registers in half().
Half gives you the second half of a SIMD16 register, but if the register
is a uniform it would incorrectly give you the next register.
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>