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* i965: Separate gl_InstanceID and gl_VertexID uploading.Kenneth Graunke2014-09-125-16/+42
| | | | | | | | | | | | | | | | We always uploaded them together, mostly out of laziness - both required an additional vertex element. However, gl_VertexID now also requires an additional vertex buffer for storing gl_BaseVertex; for non-indirect draws this also means uploading (a small amount of) data. This is extra overhead we don't need if the shader only uses gl_InstanceID. In particular, our clear shaders currently use gl_InstanceID for doing layered clears, but don't need gl_VertexID. Signed-off-by: Kenneth Graunke <[email protected]> Cc: "10.3" <[email protected]> Reviewed-by: Ian Romanick <[email protected]> Tested-by: Ian Romanick <[email protected]>
* i965: Fix reference counting in new basevertex upload code.Kenneth Graunke2014-09-121-0/+3
| | | | | | | | | | | | | | | | | | | | In the non-indirect draw case, we call intel_upload_data to upload gl_BaseVertex. It makes brw->draw.draw_params_bo point to the upload buffer, and increments the upload BO reference count. So, we need to unreference it when making brw->draw.draw_params_bo point at something else, or else we'll retain a reference to stale upload buffers and hold on to them forever. This also means that the indirect case should increment the reference count on the indirect draw buffer when making brw->draw.draw_params_bo point at it. That way, both paths increment the reference count, so we can safely unreference it every time. Signed-off-by: Kenneth Graunke <[email protected]> Cc: "10.3" <[email protected]> Reviewed-by: Ian Romanick <[email protected]> Tested-by: Ian Romanick <[email protected]>
* nouveau: only enable stencil func if the visual has stencil bitsIlia Mirkin2014-09-122-2/+2
| | | | | | | The _Enabled property already has the relevant information. Signed-off-by: Ilia Mirkin <[email protected]> Cc: "10.2 10.3" <[email protected]>
* nouveau: only enable the depth test if there actually is a depth bufferIlia Mirkin2014-09-125-4/+9
| | | | | Signed-off-by: Ilia Mirkin <[email protected]> Cc: "10.2 10.3" <[email protected]>
* i965/vec4: Only examine virtual_grf_end for GRF sourcesIan Romanick2014-09-111-8/+12
| | | | | | | | | | | | | If the source is not a GRF, it could have a register >= virtual_grf_count. Accessing virtual_grf_end with such a register would lead to out-of-bounds access. Make sure the source is a GRF before accessing virtual_grf_end. Fixes Valgrind complaints while compiling some shaders. Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Cc: [email protected]
* i965: Implement GL_PRIMITIVES_GENERATED with non-zero streams.Iago Toral Quiroga2014-09-111-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | So far we have been using CL_INVOCATION_COUNT to resolve this query but this is no good with streams, as only stream 0 reaches the clipping stage. From ARB_transform_feedback3: "When a generated primitive query for a vertex stream is active, the primitives-generated count is incremented every time a primitive emitted to that stream reaches the Discarding Rasterization stage (see Section 3.x) right before rasterization. This counter is incremented whether or not transform feedback is active." Unfortunately, we don't have any registers that provide the number of primitives written to a specific stream other than the ones that track the number of primitives written to transform feedback in the SOL stage, so we can't implement this exactly as specified. In the past we implemented this feature by activating the SOL unit even if transform feeback was disabled, but making it so that all buffers were disabled and it only recorded statistics, which gave us the right semantics (see 3178d2474ae5bdd1102fb3d76a60d1d63c961ff5). Unfortunately, this came with a significant performance impact and had to be reverted. This new take does not intend to implement the exact semantics required by the spec, but improves what we have now, since now we return the primitive count for stream 0 in all cases. With this patch we use GEN7_SO_PRIM_STORAGE_NEEDED to resolve GL_PRIMITIVES_GENERATED queries for non-zero streams. This would return the number of primitives written to transform feedback for each stream instead. Since non-zero streams are only useful in combination with transform feedback this should not be too bad, and the only case that I think we would not be supporting would be the one in which we want to use both GL_PRIMITIVES_GENERATED and GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN on the same non-zero stream to detect buffer overflow. This patch also fixes the following piglit test: arb_gpu_shader5-xfb-streams-without-invocations This test uses both GL_PRIMITIVES_GENERATED and GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN queries on non-zero streams, but it does never hit the overflow case, so both queries are always expected to return the same value. Reviewed-by: Kenneth Graunke <[email protected]> Cc: "10.3" <[email protected]>
* i965: Disable guardband clipping in the smaller-than-viewport case.Kenneth Graunke2014-09-101-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | Apparently guardband clipping doesn't work like we thought: objects entirely outside fthe guardband are trivially rejected, regardless of their relation to the viewport. Normally, the guardband is larger than the viewport, so this is not a problem. However, when the viewport is larger than the guardband, this means that we would discard primitives which were wholly outside of the guardband, but still visible. We always program the guardband to 8K x 8K to enforce the restriction that the screenspace bounding box of a single triangle must be no more than 8K x 8K. So, if the viewport is larger than that, we need to disable guardband clipping. Fixes ES3 conformance tests: - framebuffer_blit_functionality_negative_height_blit - framebuffer_blit_functionality_negative_width_blit - framebuffer_blit_functionality_negative_dimensions_blit - framebuffer_blit_functionality_magnifying_blit - framebuffer_blit_functionality_multisampled_to_singlesampled_blit v2: Mention the acronym expansion for TA/TR/MC in the comments. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Topi Pohjolainen <[email protected]>
* i965: Request lowering gl_VertexIDIan Romanick2014-09-101-0/+1
| | | | | | | | | | | | | Fixes the (new) piglit tests gles-3.0-drawarrays-vertexid, gl-3.0-multidrawarrays-vertexid, and gl-3.2-basevertex-vertexid. Fixes gles3conform failure in: ES3-CTS.gtf.GL3Tests.transform_feedback.transform_feedback_vertex_id Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80247 Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965: Expose gl_BaseVertex via a vertex attribute.Kenneth Graunke2014-09-103-20/+65
| | | | | | | | | | | | | | | | | | | Now that we have the data available, we need to expose it to the shaders. We can reuse the same vertex element that we use for gl_VertexID, but we need to back it by an actual vertex buffer. A hardware restriction requires that vertex attributes coming from a buffer (STORE_SRC) must come before any other types (i.e. STORE_0). So, we have to make gl_BaseVertex be the .x component of the vertex attribute. This means moving gl_VertexID to a different component. I chose to move gl_VertexID and gl_InstanceID to the .z and .w components, respectively, to make room for gl_BaseInstance in the .y component (which would also come from a buffer, and therefore be STORE_SRC). Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* i965: Refactor Gen4-7 VERTEX_BUFFER_STATE emission into a helper.Kenneth Graunke2014-09-101-30/+47
| | | | | | | | | We'll need to emit another VERTEX_BUFFER_STATE for gl_BaseVertex; pulling this into a helper function will save us from having to deal with cross-generation differences in that code. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* i965: Make gl_BaseVertex available in a buffer object.Kenneth Graunke2014-09-103-0/+31
| | | | | | | | | | | This will be used for GL_ARB_shader_draw_parameters, as well as fixing gl_VertexID, which is supposed to include gl_BaseVertex's value. For indirect draws, we simply point at the indirect buffer; for normal draws, we upload the value via the upload buffer. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* i965: Calculate start/base_vertex_location after preparing vertices.Kenneth Graunke2014-09-106-12/+34
| | | | | Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Ian Romanick <[email protected]>
* i965: Handle SYSTEM_VALUE_VERTEX_ID_ZERO_BASEIan Romanick2014-09-101-0/+1
| | | | | Signed-off-by: Ian Romanick <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* xmlconfig: suppress libGL warnings when LIBGL_DEBUG == "quiet"Stefan Dirsch2014-09-091-1/+3
| | | | | | | | Let's handle LIBGL_DEBUG env. variable in Mesa in a consistent way. Fixes: https://bugzilla.novell.com/show_bug.cgi?id=895730 Signed-off-by: Stefan Dirsch <[email protected]> Reviewed-by: Courtney Goeltzenleuchter <[email protected]>
* i965: Handle ir_binop_ubo_load in boolean expression code.Kenneth Graunke2014-09-082-4/+4
| | | | | | | | | | | | | | | | | | | UBO loads can be boolean-valued expressions, too, so we need to handle them in emit_bool_to_cond_code() and emit_if_gen6(). However, unlike most expressions, it doesn't make sense to evaluate their operands, then do something with the results. We just want to evaluate the UBO load as a whole---which performs the read from memory---then load the boolean result into the flag register. Instead of adding code to handle it, we can simply bypass the ir_expression handling, and fall through to the default code, which will do exactly that. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83468 Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]> Cc: [email protected]
* i965/fs: Make emit_if_gen6 never fall back to emit_bool_to_cond_code.Kenneth Graunke2014-09-081-8/+17
| | | | | | | | | | | | | | | | | Matt and I believe that Sandybridge actually uses 0xFFFFFFFF for a "true" comparison result, similar to Ivybridge. This matches the internal documentation, and empirical results, but contradicts the PRM. So, the comment is inaccurate, and we can actually just handle these directly without ever needing to fall through to the condition code path. Also, the vec4 backend has always done it this way, and has apparently been working fine. This patch makes the FS backend match the vec4 backend's behavior. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965: Handle ir_triop_csel in emit_if_gen6().Kenneth Graunke2014-09-082-4/+33
| | | | | | | | | | | | ir_triop_csel can return a boolean expression, so we need to handle it here; we simply forgot when we added ir_triop_csel, and forgot again when adding it to emit_bool_to_cond_code. Fixes Piglit's EXT_shader_integer_mix/{vs,fs}-mix-if-bool on Sandybridge. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]> Cc: [email protected]
* i965/fs: Remove direct fs_visitor gl_fragment_program dependenceJordan Justen2014-09-064-4/+8
| | | | | | | Instead we cast backend_visitor::prog for fragment shader specific code paths. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Remove direct fs_generator brw_wm_prog_key dependenceJordan Justen2014-09-052-2/+10
| | | | | | | | Instead we store a void pointer to the key, and cast it to brw_wm_prog_key for fragment shader specific code paths. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Remove direct fs_generator brw_wm_prog_data dependenceJordan Justen2014-09-052-15/+24
| | | | | | | | Instead we store a brw_stage_prog_data pointer, and cast it to brw_wm_prog_data for fragment shader specific code paths. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Don't store gl_fragment_program* in fs_generatorJordan Justen2014-09-052-7/+8
| | | | | | | gl_program* is named prog similar to backend_visitor. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965: Add uses_kill to brw_wm_prog_dataJordan Justen2014-09-055-8/+10
| | | | | Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Rename fs_generator::prog to shader_progJordan Justen2014-09-052-7/+7
| | | | | | | This matches backend_visitor, and will allow gl_program to be named prog. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Add stage variable to fs_generatorJordan Justen2014-09-052-3/+5
| | | | | | | This will allow for stage specific code paths. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965: Adjust fast-clear resolve rect for BDWKristian Høgsberg2014-09-051-4/+10
| | | | | | | | | | The scale factors for the resolve rectangle change for BDW and we have to look at brw->gen now to figure out how big it should be. Fixes: https://bugs.freedesktop.org/attachment.cgi?id=105777 Cc: "10.3" <[email protected]> Signed-off-by: Kristian Høgsberg <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Don't look at virtual_grf_sizes for uniformsJason Ekstrand2014-09-051-2/+1
| | | | | | | | | Uniform values are in the UNIFORM register file, not the GRF register file. Looking in virtual_grf_sizes makes no sense and only makes the output of dump_instructions confusing. Signed-off-by: Jason Ekstrand <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965/blorp: Pass image formats seperately from the miptreeJason Ekstrand2014-09-054-19/+43
| | | | | | | | | | | | | | | When a texture is wrapped in a texture view, we can't trust the format in the miptree itself. This patch allows us to pass the format seperately through blorp so we can proprerly handled wrapped textures. It's worth noting here that we can use the miptree format directly for depth/stencil formats because they cannot be reinterpreted by a texture view. Signed-off-by: Jason Ekstrand <[email protected]> CC: "10.3" <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]> Reviewed-by: Kristian Høgsberg <[email protected]>
* i965/fs: Brown bag fix.Matt Turner2014-09-051-1/+1
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* i965/vec4: Add ability to reswizzle arbitrary swizzles.Matt Turner2014-09-051-56/+18
| | | | | | | | | | | | | | | | Before commit 04895f5c we would only reswizzle dot product instructions (since they wrote the same value into all channels, and we didn't have to think about anything else). That commit extended reswizzling to cases when the swizzle was single valued -- i.e., writing the same result into all channels. But allowing reswizzling of arbitrary things is actually really easy and is even less code. (Why didn't we do this in the first place?!) total instructions in shared programs: 4266079 -> 4261000 (-0.12%) instructions in affected programs: 351933 -> 346854 (-1.44%) Reviewed-by: Kenneth Graunke <[email protected]>
* i965/vec4: Reswizzle sources when necessary.Matt Turner2014-09-052-11/+25
| | | | | | | | | | Despite the comment above the function claiming otherwise, the function did not reswizzle sources, which would lead to bad code generation since commit 04895f5c, which began claiming we could do such swizzling when we could not. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82932 Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Clean up emitting of untyped atomic and surface readsJason Ekstrand2014-09-051-6/+4
| | | | | Signed-off-by: Jason Ekstrand <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965/fs: Fix basic block tracking in try_rep_send().Matt Turner2014-09-051-4/+9
| | | | | | | The 'start' instruction is always in the current block, except for the case of shader time, which emits code in a pattern seen no where else. Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Pass block to insert and remove functions missed earlier.Matt Turner2014-09-051-7/+7
| | | | | | | | | | | | | | | Otherwise, the basic block start/end IPs don't get updated properly, leading to a broken CFG. This usually results in the following assertion failure: brw_fs_live_variables.cpp:141: void brw::fs_live_variables::setup_def_use(): Assertion `ip == block->start_ip' failed. Fixes KWin, WebGL demos, and a score of Piglit tests on Sandybridge and earlier hardware. Reviewed-by: Kenneth Graunke <[email protected]>
* i965: Mark cfg dumping functions const.Kenneth Graunke2014-09-052-4/+4
| | | | | | | | | | The dump() methods don't alter the CFG or basic blocks, so we should mark them as const. This lets you call them even if you have a const cfg_t - which is the case in certain portions of the code (such as live interval handling). Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965: Update if_block/else_block in the dead control flow pass.Matt Turner2014-09-051-0/+7
| | | | | | I think this bug crept in only recently. Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Connect cfg properly in predicated break peephole.Matt Turner2014-09-051-4/+9
| | | | | | | | If the ENDIF instruction was the only instruction in its block, we'd leave the successors of the merged if+jump block in a bad state. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=83080 Reviewed-by: Kenneth Graunke <[email protected]>
* Revert 5 i965 patches: 8e27a4d2, 373143ed, c5bdf9be, 6f56e142, 88e3d404Jordan Justen2014-09-0434-185/+112
| | | | | | | | | | | | | | | | | | | | | | Reverts * "i965: Modify state upload to allow 2 different sets of state atoms." 8e27a4d2b3e4e74e9a77446bce49607433d86be3 * "i965: Modify dirty bit handling to support 2 pipelines." 373143ed9187c4d4ce1e3c486b5dd0880d18ec8b * "i965: Create a macro for checking a dirty bit." c5bdf9be1eca190417998d548fd140c1eca37a54 Conflicts: src/mesa/drivers/dri/i965/brw_context.h * "i965: Create a macro for setting all dirty bits." 6f56e1424d923fd80c84090fbf4506c9eaaffea1 Conflicts: src/mesa/drivers/dri/i965/brw_blorp.cpp src/mesa/drivers/dri/i965/brw_state_cache.c src/mesa/drivers/dri/i965/brw_state_upload.c * "i965: Create a macro for setting a dirty bit." 88e3d404dad009d8cff5124cf8acee7daeaceb64 Signed-off-by: Jordan Justen <[email protected]>
* i965/fs: Use prog rather than fp->Base in fs_visitorJordan Justen2014-09-042-15/+15
| | | | | | | Reduce fs_visitor's dependence on gl_fragment_program. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Use stage_prog_data instead of prog_data->base in fs_visitorJordan Justen2014-09-041-6/+6
| | | | | Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* i965/fs: Add init function to fs_visitorJordan Justen2014-09-042-0/+7
| | | | | | | | This common init routine can be used by constructors for multiple program types. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Kenneth Graunke <[email protected]>
* Eliminate several cases of multiplication in arguments to callocCarl Worth2014-09-032-3/+3
| | | | | | | | | | | | | | | | | | | | | | In commit 32f2fd1c5d6088692551c80352b7d6fa35b0cd09, several calls to _mesa_calloc(x) were replaced with calls to calloc(1, x). This is strictly equivalent to what the code was doing previously. But for cases where "x" involves multiplication, now that we are explicitly using the two-argument calloc, we can do one step better and replace: calloc(1, A * B); with: calloc(A, B); The advantage of the latter is that calloc will detect any overflow that would have resulted from the multiplication and will fail the allocation, (whereas the former would return a small allocation). So this fix can change potentially exploitable buffer overruns into segmentation faults. Reviewed-by: Matt Turner <[email protected]>
* i965: Handle ir_triop_csel in emit_bool_to_cond_code().Kenneth Graunke2014-09-032-4/+36
| | | | | | | | | | | ir_triop_csel can return a boolean expression, so we need to handle it here; we simply forgot when we added it. Fixes Piglit's EXT_shader_integer_mix/{vs,fs}-mix-if-bool. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Matt Turner <[email protected]> Cc: [email protected]
* i965: Move curb_read_length/total_scratch to brw_stage_prog_data.Kenneth Graunke2014-09-0316-38/+40
| | | | | | | | All shader stages have these fields, so it makes sense to store them in the common base structure, rather than duplicating them in each. Signed-off-by: Kenneth Graunke <[email protected]> Reviewed-by: Jordan Justen <[email protected]>
* i965/copy_image: Divide the x offsets by block width when using the blitterJason Ekstrand2014-09-031-10/+21
| | | | | | | | Signed-off-by: Jason Ekstrand <[email protected]> Cc: "10.3" <[email protected]> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82804 Tested-by: Tapani Pälli <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965/copy_image: Use the correct block dimensionJason Ekstrand2014-09-031-6/+6
| | | | | | | | Signed-off-by: Jason Ekstrand <[email protected]> Cc: "10.3" <[email protected]> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82804 Tested-by: Tapani Pälli <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* i965/copy_image: Use the correct texture levelJason Ekstrand2014-09-031-4/+6
| | | | | | | | | | | | Previously, we were using the source images level for both source and destination. Also, we weren't taking the MinLevel from a potential texture view into account. This commit fixes both problems. Signed-off-by: Jason Ekstrand <[email protected]> Cc: "10.3" <[email protected]> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=82804 Tested-by: Tapani Pälli <[email protected]> Reviewed-by: Matt Turner <[email protected]>
* mesa: Convert NewDriverState to 64-bitsJordan Justen2014-09-014-4/+16
| | | | | | | i965 will have more than 32 bits when BRW_STATE_COMPUTE_PROGRAM is added. Signed-off-by: Jordan Justen <[email protected]> Reviewed-by: Marek Olšák <[email protected]>
* i965: Modify state upload to allow 2 different sets of state atoms.Paul Berry2014-09-012-25/+32
| | | | | | | The set of state atoms for compute shaders is currently empty; it will be filled in by future patches. Reviewed-by: Jordan Justen <[email protected]>
* i965: Modify dirty bit handling to support 2 pipelines.Paul Berry2014-09-014-16/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The hardware state for compute shaders is almost entirely orthogonal to the hardware state for 3D rendering. To avoid sending unnecessary state to the hardware, we'll need to have a separate set of state atoms for the compute pipeline and the 3D pipeline. That means we need to maintain two separate sets of dirty bits to determine which state atoms need to be run. But the dirty bits are not completely independent; for example, if BRW_NEW_SURFACES is flagged while doing 3D rendering, then not only do we need to re-run 3D state atoms that depend on BRW_NEW_SURFACES, but we also need to re-run compute state atoms that depend on BRW_NEW_SURFACES. But we'll also need to re-run those state atoms the next time the compute pipeline is run. To accomplish this, we record two sets of dirty bits, one for each pipeline. When bits are dirtied (via SET_DIRTY_BIT() or SET_DIRTY_ALL()) we set them to the dirty state in both pipelines. When brw_state_upload() is run, we clear the dirty bits just for the pipeline that was run. Note that since the number of pipelines is known at compile time to be 2, the compiler should unroll the loops in SET_DIRTY_BIT() and SET_DIRTY_ALL(). Reviewed-by: Jordan Justen <[email protected]>
* i965: Create a macro for checking a dirty bit.Paul Berry2014-09-012-1/+7
| | | | | | | This will make it easier to extend dirty bit handling to support compute shaders. Reviewed-by: Jordan Justen <[email protected]>