2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keith@tungstengraphics.com>
33 #include "main/compiler.h"
34 #include "brw_context.h"
37 #include "brw_state.h"
38 #include "program/prog_print.h"
39 #include "program/prog_parameter.h"
41 #include "glsl/ralloc.h"
43 static inline void assign_vue_slot(struct brw_vue_map
*vue_map
,
46 /* Make sure this vert_result hasn't been assigned a slot already */
47 assert (vue_map
->vert_result_to_slot
[vert_result
] == -1);
49 vue_map
->vert_result_to_slot
[vert_result
] = vue_map
->num_slots
;
50 vue_map
->slot_to_vert_result
[vue_map
->num_slots
++] = vert_result
;
54 * Compute the VUE map for vertex shader program.
56 * Note that consumers of this map using cache keys must include
57 * prog_data->userclip and prog_data->outputs_written in their key
58 * (generated by CACHE_NEW_VS_PROG).
61 brw_compute_vue_map(struct brw_vs_compile
*c
)
63 struct brw_context
*brw
= c
->func
.brw
;
64 const struct intel_context
*intel
= &brw
->intel
;
65 struct brw_vue_map
*vue_map
= &c
->prog_data
.vue_map
;
66 GLbitfield64 outputs_written
= c
->prog_data
.outputs_written
;
69 vue_map
->num_slots
= 0;
70 for (i
= 0; i
< BRW_VERT_RESULT_MAX
; ++i
) {
71 vue_map
->vert_result_to_slot
[i
] = -1;
72 vue_map
->slot_to_vert_result
[i
] = BRW_VERT_RESULT_MAX
;
75 /* VUE header: format depends on chip generation and whether clipping is
80 /* There are 8 dwords in VUE header pre-Ironlake:
81 * dword 0-3 is indices, point width, clip flags.
82 * dword 4-7 is ndc position
83 * dword 8-11 is the first vertex data.
85 assign_vue_slot(vue_map
, VERT_RESULT_PSIZ
);
86 assign_vue_slot(vue_map
, BRW_VERT_RESULT_NDC
);
87 assign_vue_slot(vue_map
, VERT_RESULT_HPOS
);
90 /* There are 20 DWs (D0-D19) in VUE header on Ironlake:
91 * dword 0-3 of the header is indices, point width, clip flags.
92 * dword 4-7 is the ndc position
93 * dword 8-11 of the vertex header is the 4D space position
94 * dword 12-19 of the vertex header is the user clip distance.
95 * dword 20-23 is a pad so that the vertex element data is aligned
96 * dword 24-27 is the first vertex data we fill.
98 * Note: future pipeline stages expect 4D space position to be
99 * contiguous with the other vert_results, so we make dword 24-27 a
100 * duplicate copy of the 4D space position.
102 assign_vue_slot(vue_map
, VERT_RESULT_PSIZ
);
103 assign_vue_slot(vue_map
, BRW_VERT_RESULT_NDC
);
104 assign_vue_slot(vue_map
, BRW_VERT_RESULT_HPOS_DUPLICATE
);
105 assign_vue_slot(vue_map
, VERT_RESULT_CLIP_DIST0
);
106 assign_vue_slot(vue_map
, VERT_RESULT_CLIP_DIST1
);
107 assign_vue_slot(vue_map
, BRW_VERT_RESULT_PAD
);
108 assign_vue_slot(vue_map
, VERT_RESULT_HPOS
);
112 /* There are 8 or 16 DWs (D0-D15) in VUE header on Sandybridge:
113 * dword 0-3 of the header is indices, point width, clip flags.
114 * dword 4-7 is the 4D space position
115 * dword 8-15 of the vertex header is the user clip distance if
117 * dword 8-11 or 16-19 is the first vertex element data we fill.
119 assign_vue_slot(vue_map
, VERT_RESULT_PSIZ
);
120 assign_vue_slot(vue_map
, VERT_RESULT_HPOS
);
121 if (c
->key
.userclip_active
) {
122 assign_vue_slot(vue_map
, VERT_RESULT_CLIP_DIST0
);
123 assign_vue_slot(vue_map
, VERT_RESULT_CLIP_DIST1
);
125 /* front and back colors need to be consecutive so that we can use
126 * ATTRIBUTE_SWIZZLE_INPUTATTR_FACING to swizzle them when doing
129 if (outputs_written
& BITFIELD64_BIT(VERT_RESULT_COL0
))
130 assign_vue_slot(vue_map
, VERT_RESULT_COL0
);
131 if (outputs_written
& BITFIELD64_BIT(VERT_RESULT_BFC0
))
132 assign_vue_slot(vue_map
, VERT_RESULT_BFC0
);
133 if (outputs_written
& BITFIELD64_BIT(VERT_RESULT_COL1
))
134 assign_vue_slot(vue_map
, VERT_RESULT_COL1
);
135 if (outputs_written
& BITFIELD64_BIT(VERT_RESULT_BFC1
))
136 assign_vue_slot(vue_map
, VERT_RESULT_BFC1
);
139 assert (!"VUE map not known for this chip generation");
143 /* The hardware doesn't care about the rest of the vertex outputs, so just
144 * assign them contiguously. Don't reassign outputs that already have a
147 * Also, prior to Gen6, don't assign a slot for VERT_RESULT_CLIP_VERTEX,
148 * since it is unsupported. In Gen6 and above, VERT_RESULT_CLIP_VERTEX may
149 * be needed for transform feedback; since we don't want to have to
150 * recompute the VUE map (and everything that depends on it) when transform
151 * feedback is enabled or disabled, just go ahead and assign a slot for it.
153 for (int i
= 0; i
< VERT_RESULT_MAX
; ++i
) {
154 if (intel
->gen
< 6 && i
== VERT_RESULT_CLIP_VERTEX
)
156 if ((outputs_written
& BITFIELD64_BIT(i
)) &&
157 vue_map
->vert_result_to_slot
[i
] == -1) {
158 assign_vue_slot(vue_map
, i
);
165 * Decide which set of clip planes should be used when clipping via
166 * gl_Position or gl_ClipVertex.
168 gl_clip_plane
*brw_select_clip_planes(struct gl_context
*ctx
)
170 if (ctx
->Shader
.CurrentVertexProgram
) {
171 /* There is currently a GLSL vertex shader, so clip according to GLSL
172 * rules, which means compare gl_ClipVertex (or gl_Position, if
173 * gl_ClipVertex wasn't assigned) against the eye-coordinate clip planes
174 * that were stored in EyeUserPlane at the time the clip planes were
177 return ctx
->Transform
.EyeUserPlane
;
179 /* Either we are using fixed function or an ARB vertex program. In
180 * either case the clip planes are going to be compared against
181 * gl_Position (which is in clip coordinates) so we have to clip using
182 * _ClipUserPlane, which was transformed into clip coordinates by Mesa
185 return ctx
->Transform
._ClipUserPlane
;
190 brw_vs_prog_data_compare(const void *in_a
, const void *in_b
,
191 int aux_size
, const void *in_key
)
193 const struct brw_vs_prog_data
*a
= in_a
;
194 const struct brw_vs_prog_data
*b
= in_b
;
196 /* Compare all the struct up to the pointers. */
197 if (memcmp(a
, b
, offsetof(struct brw_vs_prog_data
, param
)))
200 if (memcmp(a
->param
, b
->param
, a
->nr_params
* sizeof(void *)))
203 if (memcmp(a
->pull_param
, b
->pull_param
, a
->nr_pull_params
* sizeof(void *)))
210 do_vs_prog(struct brw_context
*brw
,
211 struct gl_shader_program
*prog
,
212 struct brw_vertex_program
*vp
,
213 struct brw_vs_prog_key
*key
)
215 struct gl_context
*ctx
= &brw
->intel
.ctx
;
216 struct intel_context
*intel
= &brw
->intel
;
218 const GLuint
*program
;
219 struct brw_vs_compile c
;
224 memset(&c
, 0, sizeof(c
));
225 memcpy(&c
.key
, key
, sizeof(*key
));
227 mem_ctx
= ralloc_context(NULL
);
229 brw_init_compile(brw
, &c
.func
, mem_ctx
);
232 c
.prog_data
.outputs_written
= vp
->program
.Base
.OutputsWritten
;
233 c
.prog_data
.inputs_read
= vp
->program
.Base
.InputsRead
;
235 if (c
.key
.copy_edgeflag
) {
236 c
.prog_data
.outputs_written
|= BITFIELD64_BIT(VERT_RESULT_EDGE
);
237 c
.prog_data
.inputs_read
|= VERT_BIT_EDGEFLAG
;
240 /* Put dummy slots into the VUE for the SF to put the replaced
241 * point sprite coords in. We shouldn't need these dummy slots,
242 * which take up precious URB space, but it would mean that the SF
243 * doesn't get nice aligned pairs of input coords into output
244 * coords, which would be a pain to handle.
246 for (i
= 0; i
< 8; i
++) {
247 if (c
.key
.point_coord_replace
& (1 << i
))
248 c
.prog_data
.outputs_written
|= BITFIELD64_BIT(VERT_RESULT_TEX0
+ i
);
251 brw_compute_vue_map(&c
);
254 _mesa_fprint_program_opt(stdout
, &c
.vp
->program
.Base
, PROG_PRINT_DEBUG
,
261 if (!brw_vs_emit(prog
, &c
)) {
262 ralloc_free(mem_ctx
);
269 if (c
.prog_data
.nr_pull_params
)
270 c
.prog_data
.num_surfaces
= 1;
271 if (c
.vp
->program
.Base
.SamplersUsed
)
272 c
.prog_data
.num_surfaces
= SURF_INDEX_VS_TEXTURE(BRW_MAX_TEX_UNIT
);
274 prog
->_LinkedShaders
[MESA_SHADER_VERTEX
]->NumUniformBlocks
) {
275 c
.prog_data
.num_surfaces
=
276 SURF_INDEX_VS_UBO(prog
->_LinkedShaders
[MESA_SHADER_VERTEX
]->NumUniformBlocks
);
279 /* Scratch space is used for register spilling */
280 if (c
.last_scratch
) {
281 perf_debug("Vertex shader triggered register spilling. "
282 "Try reducing the number of live vec4 values to "
283 "improve performance.\n");
285 c
.prog_data
.total_scratch
= brw_get_scratch_size(c
.last_scratch
);
287 brw_get_scratch_bo(intel
, &brw
->vs
.scratch_bo
,
288 c
.prog_data
.total_scratch
* brw
->max_vs_threads
);
293 program
= brw_get_program(&c
.func
, &program_size
);
295 /* We upload from &c.prog_data including the constant_map assuming
296 * they're packed together. It would be nice to have a
297 * compile-time assert macro here.
299 assert(c
.constant_map
== (int8_t *)&c
.prog_data
+
300 sizeof(c
.prog_data
));
301 assert(ctx
->Const
.VertexProgram
.MaxNativeParameters
==
302 ARRAY_SIZE(c
.constant_map
));
305 aux_size
= sizeof(c
.prog_data
);
307 aux_size
+= c
.vp
->program
.Base
.Parameters
->NumParameters
;
309 brw_upload_cache(&brw
->cache
, BRW_VS_PROG
,
310 &c
.key
, sizeof(c
.key
),
311 program
, program_size
,
312 &c
.prog_data
, aux_size
,
313 &brw
->vs
.prog_offset
, &brw
->vs
.prog_data
);
314 ralloc_free(mem_ctx
);
320 key_debug(const char *name
, int a
, int b
)
323 perf_debug(" %s %d->%d\n", name
, a
, b
);
330 brw_vs_debug_recompile(struct brw_context
*brw
,
331 struct gl_shader_program
*prog
,
332 const struct brw_vs_prog_key
*key
)
334 struct brw_cache_item
*c
= NULL
;
335 const struct brw_vs_prog_key
*old_key
= NULL
;
338 perf_debug("Recompiling vertex shader for program %d\n", prog
->Name
);
340 for (unsigned int i
= 0; i
< brw
->cache
.size
; i
++) {
341 for (c
= brw
->cache
.items
[i
]; c
; c
= c
->next
) {
342 if (c
->cache_id
== BRW_VS_PROG
) {
345 if (old_key
->program_string_id
== key
->program_string_id
)
354 perf_debug(" Didn't find previous compile in the shader cache for "
359 for (unsigned int i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
360 found
|= key_debug("GL_FIXED rescaling",
361 old_key
->gl_fixed_input_size
[i
],
362 key
->gl_fixed_input_size
[i
]);
365 found
|= key_debug("user clip flags",
366 old_key
->userclip_active
, key
->userclip_active
);
368 found
|= key_debug("user clipping planes as push constants",
369 old_key
->nr_userclip_plane_consts
,
370 key
->nr_userclip_plane_consts
);
372 found
|= key_debug("clip distance enable",
373 old_key
->uses_clip_distance
, key
->uses_clip_distance
);
374 found
|= key_debug("clip plane enable bitfield",
375 old_key
->userclip_planes_enabled_gen_4_5
,
376 key
->userclip_planes_enabled_gen_4_5
);
377 found
|= key_debug("copy edgeflag",
378 old_key
->copy_edgeflag
, key
->copy_edgeflag
);
379 found
|= key_debug("PointCoord replace",
380 old_key
->point_coord_replace
, key
->point_coord_replace
);
381 found
|= key_debug("vertex color clamping",
382 old_key
->clamp_vertex_color
, key
->clamp_vertex_color
);
384 found
|= brw_debug_recompile_sampler_key(&old_key
->tex
, &key
->tex
);
387 perf_debug(" Something else\n");
391 static void brw_upload_vs_prog(struct brw_context
*brw
)
393 struct intel_context
*intel
= &brw
->intel
;
394 struct gl_context
*ctx
= &intel
->ctx
;
395 struct brw_vs_prog_key key
;
396 /* BRW_NEW_VERTEX_PROGRAM */
397 struct brw_vertex_program
*vp
=
398 (struct brw_vertex_program
*)brw
->vertex_program
;
399 struct gl_program
*prog
= (struct gl_program
*) brw
->vertex_program
;
402 memset(&key
, 0, sizeof(key
));
404 /* Just upload the program verbatim for now. Always send it all
405 * the inputs it asks for, whether they are varying or not.
407 key
.program_string_id
= vp
->id
;
408 key
.userclip_active
= (ctx
->Transform
.ClipPlanesEnabled
!= 0);
409 key
.uses_clip_distance
= vp
->program
.UsesClipDistance
;
410 if (key
.userclip_active
&& !key
.uses_clip_distance
) {
411 if (intel
->gen
< 6) {
412 key
.nr_userclip_plane_consts
413 = _mesa_bitcount_64(ctx
->Transform
.ClipPlanesEnabled
);
414 key
.userclip_planes_enabled_gen_4_5
415 = ctx
->Transform
.ClipPlanesEnabled
;
417 key
.nr_userclip_plane_consts
418 = _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
423 if (intel
->gen
< 6) {
424 key
.copy_edgeflag
= (ctx
->Polygon
.FrontMode
!= GL_FILL
||
425 ctx
->Polygon
.BackMode
!= GL_FILL
);
428 /* _NEW_LIGHT | _NEW_BUFFERS */
429 key
.clamp_vertex_color
= ctx
->Light
._ClampVertexColor
;
432 if (ctx
->Point
.PointSprite
) {
433 for (i
= 0; i
< 8; i
++) {
434 if (ctx
->Point
.CoordReplace
[i
])
435 key
.point_coord_replace
|= (1 << i
);
440 brw_populate_sampler_prog_key_data(ctx
, prog
, &key
.tex
);
442 /* BRW_NEW_VERTICES */
443 for (i
= 0; i
< VERT_ATTRIB_MAX
; i
++) {
444 if (vp
->program
.Base
.InputsRead
& BITFIELD64_BIT(i
) &&
445 brw
->vb
.inputs
[i
].glarray
->Type
== GL_FIXED
) {
446 key
.gl_fixed_input_size
[i
] = brw
->vb
.inputs
[i
].glarray
->Size
;
450 if (!brw_search_cache(&brw
->cache
, BRW_VS_PROG
,
452 &brw
->vs
.prog_offset
, &brw
->vs
.prog_data
)) {
453 bool success
= do_vs_prog(brw
, ctx
->Shader
.CurrentVertexProgram
,
458 brw
->vs
.constant_map
= ((int8_t *)brw
->vs
.prog_data
+
459 sizeof(*brw
->vs
.prog_data
));
464 const struct brw_tracked_state brw_vs_prog
= {
466 .mesa
= (_NEW_TRANSFORM
| _NEW_POLYGON
| _NEW_POINT
| _NEW_LIGHT
|
469 .brw
= (BRW_NEW_VERTEX_PROGRAM
|
473 .emit
= brw_upload_vs_prog
477 brw_vs_precompile(struct gl_context
*ctx
, struct gl_shader_program
*prog
)
479 struct brw_context
*brw
= brw_context(ctx
);
480 struct brw_vs_prog_key key
;
481 uint32_t old_prog_offset
= brw
->vs
.prog_offset
;
482 struct brw_vs_prog_data
*old_prog_data
= brw
->vs
.prog_data
;
485 if (!prog
->_LinkedShaders
[MESA_SHADER_VERTEX
])
488 struct gl_vertex_program
*vp
= (struct gl_vertex_program
*)
489 prog
->_LinkedShaders
[MESA_SHADER_VERTEX
]->Program
;
490 struct brw_vertex_program
*bvp
= brw_vertex_program(vp
);
492 memset(&key
, 0, sizeof(key
));
494 key
.program_string_id
= bvp
->id
;
495 key
.clamp_vertex_color
= true;
497 for (int i
= 0; i
< MAX_SAMPLERS
; i
++) {
498 if (vp
->Base
.ShadowSamplers
& (1 << i
)) {
499 /* Assume DEPTH_TEXTURE_MODE is the default: X, X, X, 1 */
500 key
.tex
.swizzles
[i
] =
501 MAKE_SWIZZLE4(SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_X
, SWIZZLE_ONE
);
503 /* Color sampler: assume no swizzling. */
504 key
.tex
.swizzles
[i
] = SWIZZLE_XYZW
;
508 success
= do_vs_prog(brw
, prog
, bvp
, &key
);
510 brw
->vs
.prog_offset
= old_prog_offset
;
511 brw
->vs
.prog_data
= old_prog_data
;