1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
37 * - depth/stencil test
40 * This file has only the glue to assemble the fragment pipeline. The actual
41 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
42 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
43 * muster the LLVM JIT execution engine to create a function that follows an
44 * established binary interface and that can be called from C directly.
46 * A big source of complexity here is that we often want to run different
47 * stages with different precisions and data types and precisions. For example,
48 * the fragment shader needs typically to be done in floats, but the
49 * depth/stencil test and blending is better done in the type that most closely
50 * matches the depth/stencil and color buffer respectively.
52 * Since the width of a SIMD vector register stays the same regardless of the
53 * element type, different types imply different number of elements, so we must
54 * code generate more instances of the stages with larger types to be able to
55 * feed/consume the stages with smaller types.
57 * @author Jose Fonseca <jfonseca@vmware.com>
61 #include "pipe/p_defines.h"
62 #include "util/u_inlines.h"
63 #include "util/u_memory.h"
64 #include "util/u_pointer.h"
65 #include "util/format/u_format.h"
66 #include "util/u_dump.h"
67 #include "util/u_string.h"
68 #include "util/simple_list.h"
69 #include "util/u_dual_blend.h"
70 #include "util/os_time.h"
71 #include "pipe/p_shader_tokens.h"
72 #include "draw/draw_context.h"
73 #include "tgsi/tgsi_dump.h"
74 #include "tgsi/tgsi_scan.h"
75 #include "tgsi/tgsi_parse.h"
76 #include "gallivm/lp_bld_type.h"
77 #include "gallivm/lp_bld_const.h"
78 #include "gallivm/lp_bld_conv.h"
79 #include "gallivm/lp_bld_init.h"
80 #include "gallivm/lp_bld_intr.h"
81 #include "gallivm/lp_bld_logic.h"
82 #include "gallivm/lp_bld_tgsi.h"
83 #include "gallivm/lp_bld_nir.h"
84 #include "gallivm/lp_bld_swizzle.h"
85 #include "gallivm/lp_bld_flow.h"
86 #include "gallivm/lp_bld_debug.h"
87 #include "gallivm/lp_bld_arit.h"
88 #include "gallivm/lp_bld_bitarit.h"
89 #include "gallivm/lp_bld_pack.h"
90 #include "gallivm/lp_bld_format.h"
91 #include "gallivm/lp_bld_quad.h"
93 #include "lp_bld_alpha.h"
94 #include "lp_bld_blend.h"
95 #include "lp_bld_depth.h"
96 #include "lp_bld_interp.h"
97 #include "lp_context.h"
100 #include "lp_setup.h"
101 #include "lp_state.h"
102 #include "lp_tex_sample.h"
103 #include "lp_flush.h"
104 #include "lp_state_fs.h"
106 #include "nir/nir_to_tgsi_info.h"
108 /** Fragment shader number (for debugging) */
109 static unsigned fs_no
= 0;
113 * Expand the relevant bits of mask_input to a n*4-dword mask for the
114 * n*four pixels in n 2x2 quads. This will set the n*four elements of the
115 * quad mask vector to 0 or ~0.
116 * Grouping is 01, 23 for 2 quad mode hence only 0 and 2 are valid
117 * quad arguments with fs length 8.
119 * \param first_quad which quad(s) of the quad group to test, in [0,3]
120 * \param mask_input bitwise mask for the whole 4x4 stamp
123 generate_quad_mask(struct gallivm_state
*gallivm
,
124 struct lp_type fs_type
,
127 LLVMValueRef mask_input
) /* int64 */
129 LLVMBuilderRef builder
= gallivm
->builder
;
130 struct lp_type mask_type
;
131 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
132 LLVMValueRef bits
[16];
133 LLVMValueRef mask
, bits_vec
;
137 * XXX: We'll need a different path for 16 x u8
139 assert(fs_type
.width
== 32);
140 assert(fs_type
.length
<= ARRAY_SIZE(bits
));
141 mask_type
= lp_int_type(fs_type
);
144 * mask_input >>= (quad * 4)
146 switch (first_quad
) {
151 assert(fs_type
.length
== 4);
158 assert(fs_type
.length
== 4);
166 mask_input
= LLVMBuildLShr(builder
, mask_input
, lp_build_const_int64(gallivm
, 16 * sample
), "");
167 mask_input
= LLVMBuildTrunc(builder
, mask_input
,
169 mask_input
= LLVMBuildAnd(builder
, mask_input
, lp_build_const_int32(gallivm
, 0xffff), "");
171 mask_input
= LLVMBuildLShr(builder
,
173 LLVMConstInt(i32t
, shift
, 0),
177 * mask = { mask_input & (1 << i), for i in [0,3] }
179 mask
= lp_build_broadcast(gallivm
,
180 lp_build_vec_type(gallivm
, mask_type
),
183 for (i
= 0; i
< fs_type
.length
/ 4; i
++) {
184 unsigned j
= 2 * (i
% 2) + (i
/ 2) * 8;
185 bits
[4*i
+ 0] = LLVMConstInt(i32t
, 1ULL << (j
+ 0), 0);
186 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1ULL << (j
+ 1), 0);
187 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1ULL << (j
+ 4), 0);
188 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1ULL << (j
+ 5), 0);
190 bits_vec
= LLVMConstVector(bits
, fs_type
.length
);
191 mask
= LLVMBuildAnd(builder
, mask
, bits_vec
, "");
194 * mask = mask == bits ? ~0 : 0
196 mask
= lp_build_compare(gallivm
,
197 mask_type
, PIPE_FUNC_EQUAL
,
204 #define EARLY_DEPTH_TEST 0x1
205 #define LATE_DEPTH_TEST 0x2
206 #define EARLY_DEPTH_WRITE 0x4
207 #define LATE_DEPTH_WRITE 0x8
210 find_output_by_semantic( const struct tgsi_shader_info
*info
,
216 for (i
= 0; i
< info
->num_outputs
; i
++)
217 if (info
->output_semantic_name
[i
] == semantic
&&
218 info
->output_semantic_index
[i
] == index
)
226 * Fetch the specified lp_jit_viewport structure for a given viewport_index.
229 lp_llvm_viewport(LLVMValueRef context_ptr
,
230 struct gallivm_state
*gallivm
,
231 LLVMValueRef viewport_index
)
233 LLVMBuilderRef builder
= gallivm
->builder
;
236 struct lp_type viewport_type
=
237 lp_type_float_vec(32, 32 * LP_JIT_VIEWPORT_NUM_FIELDS
);
239 ptr
= lp_jit_context_viewports(gallivm
, context_ptr
);
240 ptr
= LLVMBuildPointerCast(builder
, ptr
,
241 LLVMPointerType(lp_build_vec_type(gallivm
, viewport_type
), 0), "");
243 res
= lp_build_pointer_get(builder
, ptr
, viewport_index
);
250 lp_build_depth_clamp(struct gallivm_state
*gallivm
,
251 LLVMBuilderRef builder
,
253 LLVMValueRef context_ptr
,
254 LLVMValueRef thread_data_ptr
,
257 LLVMValueRef viewport
, min_depth
, max_depth
;
258 LLVMValueRef viewport_index
;
259 struct lp_build_context f32_bld
;
261 assert(type
.floating
);
262 lp_build_context_init(&f32_bld
, gallivm
, type
);
265 * Assumes clamping of the viewport index will occur in setup/gs. Value
266 * is passed through the rasterization stage via lp_rast_shader_inputs.
268 * See: draw_clamp_viewport_idx and lp_clamp_viewport_idx for clamping
271 viewport_index
= lp_jit_thread_data_raster_state_viewport_index(gallivm
,
275 * Load the min and max depth from the lp_jit_context.viewports
276 * array of lp_jit_viewport structures.
278 viewport
= lp_llvm_viewport(context_ptr
, gallivm
, viewport_index
);
280 /* viewports[viewport_index].min_depth */
281 min_depth
= LLVMBuildExtractElement(builder
, viewport
,
282 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MIN_DEPTH
), "");
283 min_depth
= lp_build_broadcast_scalar(&f32_bld
, min_depth
);
285 /* viewports[viewport_index].max_depth */
286 max_depth
= LLVMBuildExtractElement(builder
, viewport
,
287 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MAX_DEPTH
), "");
288 max_depth
= lp_build_broadcast_scalar(&f32_bld
, max_depth
);
291 * Clamp to the min and max depth values for the given viewport.
293 return lp_build_clamp(&f32_bld
, z
, min_depth
, max_depth
);
297 lp_build_sample_alpha_to_coverage(struct gallivm_state
*gallivm
,
299 unsigned coverage_samples
,
300 LLVMValueRef num_loop
,
301 LLVMValueRef loop_counter
,
302 LLVMValueRef coverage_mask_store
,
305 struct lp_build_context bld
;
306 LLVMBuilderRef builder
= gallivm
->builder
;
307 float step
= 1.0 / coverage_samples
;
309 lp_build_context_init(&bld
, gallivm
, type
);
310 for (unsigned s
= 0; s
< coverage_samples
; s
++) {
311 LLVMValueRef alpha_ref_value
= lp_build_const_vec(gallivm
, type
, step
* s
);
312 LLVMValueRef test
= lp_build_cmp(&bld
, PIPE_FUNC_GREATER
, alpha
, alpha_ref_value
);
314 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, s
), num_loop
, "");
315 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_counter
, "");
316 LLVMValueRef s_mask_ptr
= LLVMBuildGEP(builder
, coverage_mask_store
, &s_mask_idx
, 1, "");
317 LLVMValueRef s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
318 s_mask
= LLVMBuildAnd(builder
, s_mask
, test
, "");
319 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
324 * Generate the fragment shader, depth/stencil test, and alpha tests.
327 generate_fs_loop(struct gallivm_state
*gallivm
,
328 struct lp_fragment_shader
*shader
,
329 const struct lp_fragment_shader_variant_key
*key
,
330 LLVMBuilderRef builder
,
332 LLVMValueRef context_ptr
,
333 LLVMValueRef sample_pos_array
,
334 LLVMValueRef num_loop
,
335 struct lp_build_interp_soa_context
*interp
,
336 const struct lp_build_sampler_soa
*sampler
,
337 const struct lp_build_image_soa
*image
,
338 LLVMValueRef mask_store
,
339 LLVMValueRef (*out_color
)[4],
340 LLVMValueRef depth_base_ptr
,
341 LLVMValueRef depth_stride
,
342 LLVMValueRef depth_sample_stride
,
344 LLVMValueRef thread_data_ptr
)
346 const struct util_format_description
*zs_format_desc
= NULL
;
347 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
348 struct lp_type int_type
= lp_int_type(type
);
349 LLVMTypeRef vec_type
, int_vec_type
;
350 LLVMValueRef mask_ptr
= NULL
, mask_val
= NULL
;
351 LLVMValueRef consts_ptr
, num_consts_ptr
;
352 LLVMValueRef ssbo_ptr
, num_ssbo_ptr
;
354 LLVMValueRef z_value
, s_value
;
355 LLVMValueRef z_fb
, s_fb
;
356 LLVMValueRef depth_ptr
;
357 LLVMValueRef stencil_refs
[2];
358 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
359 LLVMValueRef zs_samples
= lp_build_const_int32(gallivm
, key
->zsbuf_nr_samples
);
360 struct lp_build_for_loop_state loop_state
, sample_loop_state
;
361 struct lp_build_mask_context mask
;
363 * TODO: figure out if simple_shader optimization is really worthwile to
364 * keep. Disabled because it may hide some real bugs in the (depth/stencil)
365 * code since tests tend to take another codepath than real shaders.
367 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
368 shader
->info
.base
.num_inputs
< 3 &&
369 shader
->info
.base
.num_instructions
< 8) && 0;
370 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
371 util_blend_state_is_dual(&key
->blend
, 0);
377 struct lp_bld_tgsi_system_values system_values
;
379 memset(&system_values
, 0, sizeof(system_values
));
381 /* truncate then sign extend. */
382 system_values
.front_facing
= LLVMBuildTrunc(gallivm
->builder
, facing
, LLVMInt1TypeInContext(gallivm
->context
), "");
383 system_values
.front_facing
= LLVMBuildSExt(gallivm
->builder
, system_values
.front_facing
, LLVMInt32TypeInContext(gallivm
->context
), "");
385 if (key
->depth
.enabled
||
386 key
->stencil
[0].enabled
) {
388 zs_format_desc
= util_format_description(key
->zsbuf_format
);
389 assert(zs_format_desc
);
391 if (shader
->info
.base
.properties
[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL
])
392 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
393 else if (!shader
->info
.base
.writes_z
&& !shader
->info
.base
.writes_stencil
) {
394 if (shader
->info
.base
.writes_memory
)
395 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
396 else if (key
->alpha
.enabled
||
397 key
->blend
.alpha_to_coverage
||
398 shader
->info
.base
.uses_kill
||
399 shader
->info
.base
.writes_samplemask
) {
400 /* With alpha test and kill, can do the depth test early
401 * and hopefully eliminate some quads. But need to do a
402 * special deferred depth write once the final mask value
403 * is known. This only works though if there's either no
404 * stencil test or the stencil value isn't written.
406 if (key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
407 (key
->stencil
[1].enabled
&&
408 key
->stencil
[1].writemask
)))
409 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
411 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
414 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
417 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
420 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
421 !(key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
422 (key
->stencil
[1].enabled
&&
423 key
->stencil
[1].writemask
))))
424 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
430 vec_type
= lp_build_vec_type(gallivm
, type
);
431 int_vec_type
= lp_build_vec_type(gallivm
, int_type
);
433 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
434 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
435 /* convert scalar stencil refs into vectors */
436 stencil_refs
[0] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[0]);
437 stencil_refs
[1] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[1]);
439 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
440 num_consts_ptr
= lp_jit_context_num_constants(gallivm
, context_ptr
);
442 ssbo_ptr
= lp_jit_context_ssbos(gallivm
, context_ptr
);
443 num_ssbo_ptr
= lp_jit_context_num_ssbos(gallivm
, context_ptr
);
445 memset(outputs
, 0, sizeof outputs
);
447 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
448 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
449 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
450 lp_build_vec_type(gallivm
,
455 if (dual_source_blend
) {
456 assert(key
->nr_cbufs
<= 1);
457 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
458 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
459 lp_build_vec_type(gallivm
,
465 lp_build_for_loop_begin(&loop_state
, gallivm
,
466 lp_build_const_int32(gallivm
, 0),
469 lp_build_const_int32(gallivm
, 1));
471 if (key
->multisample
) {
472 /* create shader execution mask by combining all sample masks. */
473 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
474 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, num_loop
, lp_build_const_int32(gallivm
, s
), "");
475 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
476 LLVMValueRef s_mask
= lp_build_pointer_get(builder
, mask_store
, s_mask_idx
);
480 mask_val
= LLVMBuildOr(builder
, s_mask
, mask_val
, "");
483 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
484 &loop_state
.counter
, 1, "mask_ptr");
485 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
488 /* 'mask' will control execution based on quad's pixel alive/killed state */
489 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
491 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
492 lp_build_mask_check(&mask
);
494 /* Create storage for recombining sample masks after early Z pass. */
495 LLVMValueRef s_mask_or
= lp_build_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
), "cov_mask_early_depth");
496 LLVMBuildStore(builder
, LLVMConstNull(lp_build_int_vec_type(gallivm
, type
)), s_mask_or
);
498 LLVMValueRef s_mask
= NULL
, s_mask_ptr
= NULL
;
499 LLVMValueRef z_sample_value_store
= NULL
, s_sample_value_store
= NULL
;
500 LLVMValueRef z_fb_store
= NULL
, s_fb_store
= NULL
;
501 LLVMTypeRef z_type
= NULL
, z_fb_type
= NULL
;
503 /* Run early depth once per sample */
504 if (key
->multisample
) {
506 if (zs_format_desc
) {
507 struct lp_type zs_type
= lp_depth_type(zs_format_desc
, type
.length
);
508 struct lp_type z_type
= zs_type
;
509 struct lp_type s_type
= zs_type
;
510 if (zs_format_desc
->block
.bits
< type
.width
)
511 z_type
.width
= type
.width
;
512 else if (zs_format_desc
->block
.bits
> 32) {
513 z_type
.width
= z_type
.width
/ 2;
514 s_type
.width
= s_type
.width
/ 2;
517 z_sample_value_store
= lp_build_array_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
),
518 zs_samples
, "z_sample_store");
519 s_sample_value_store
= lp_build_array_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
),
520 zs_samples
, "s_sample_store");
521 z_fb_store
= lp_build_array_alloca(gallivm
, lp_build_vec_type(gallivm
, z_type
),
522 zs_samples
, "z_fb_store");
523 s_fb_store
= lp_build_array_alloca(gallivm
, lp_build_vec_type(gallivm
, s_type
),
524 zs_samples
, "s_fb_store");
526 lp_build_for_loop_begin(&sample_loop_state
, gallivm
,
527 lp_build_const_int32(gallivm
, 0),
528 LLVMIntULT
, lp_build_const_int32(gallivm
, key
->coverage_samples
),
529 lp_build_const_int32(gallivm
, 1));
531 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, "");
532 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
533 s_mask_ptr
= LLVMBuildGEP(builder
, mask_store
, &s_mask_idx
, 1, "");
535 s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
536 s_mask
= LLVMBuildAnd(builder
, s_mask
, mask_val
, "");
540 /* for multisample Z needs to be interpolated at sample points for testing. */
541 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
, key
->multisample
? sample_loop_state
.counter
: NULL
);
544 depth_ptr
= depth_base_ptr
;
545 if (key
->multisample
) {
546 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_loop_state
.counter
, depth_sample_stride
, "");
547 depth_ptr
= LLVMBuildGEP(builder
, depth_ptr
, &sample_offset
, 1, "");
550 if (depth_mode
& EARLY_DEPTH_TEST
) {
552 * Clamp according to ARB_depth_clamp semantics.
554 if (key
->depth_clamp
) {
555 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
558 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
559 zs_format_desc
, key
->resource_1d
,
560 depth_ptr
, depth_stride
,
561 &z_fb
, &s_fb
, loop_state
.counter
);
562 lp_build_depth_stencil_test(gallivm
,
567 key
->multisample
? NULL
: &mask
,
573 !simple_shader
&& !key
->multisample
);
575 if (depth_mode
& EARLY_DEPTH_WRITE
) {
576 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
577 zs_format_desc
, key
->resource_1d
,
578 NULL
, NULL
, NULL
, loop_state
.counter
,
579 depth_ptr
, depth_stride
,
583 * Note mask check if stencil is enabled must be after ds write not after
584 * stencil test otherwise new stencil values may not get written if all
585 * fragments got killed by depth/stencil test.
587 if (!simple_shader
&& key
->stencil
[0].enabled
&& !key
->multisample
)
588 lp_build_mask_check(&mask
);
590 if (key
->multisample
) {
591 z_fb_type
= LLVMTypeOf(z_fb
);
592 z_type
= LLVMTypeOf(z_value
);
593 lp_build_pointer_set(builder
, z_sample_value_store
, sample_loop_state
.counter
, LLVMBuildBitCast(builder
, z_value
, lp_build_int_vec_type(gallivm
, type
), ""));
594 lp_build_pointer_set(builder
, s_sample_value_store
, sample_loop_state
.counter
, LLVMBuildBitCast(builder
, s_value
, lp_build_int_vec_type(gallivm
, type
), ""));
595 lp_build_pointer_set(builder
, z_fb_store
, sample_loop_state
.counter
, z_fb
);
596 lp_build_pointer_set(builder
, s_fb_store
, sample_loop_state
.counter
, s_fb
);
600 if (key
->multisample
) {
602 * Store the post-early Z coverage mask.
603 * Recombine the resulting coverage masks post early Z into the fragment
604 * shader execution mask.
606 LLVMValueRef tmp_s_mask_or
= LLVMBuildLoad(builder
, s_mask_or
, "");
607 tmp_s_mask_or
= LLVMBuildOr(builder
, tmp_s_mask_or
, s_mask
, "");
608 LLVMBuildStore(builder
, tmp_s_mask_or
, s_mask_or
);
610 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
612 lp_build_for_loop_end(&sample_loop_state
);
614 /* recombined all the coverage masks in the shader exec mask. */
615 tmp_s_mask_or
= LLVMBuildLoad(builder
, s_mask_or
, "");
616 lp_build_mask_update(&mask
, tmp_s_mask_or
);
618 /* for multisample Z needs to be re interpolated at pixel center */
619 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
, NULL
);
622 LLVMValueRef out_sample_mask_storage
= NULL
;
623 if (shader
->info
.base
.writes_samplemask
) {
624 out_sample_mask_storage
= lp_build_alloca(gallivm
, int_vec_type
, "write_mask");
626 system_values
.sample_pos
= sample_pos_array
;
628 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
, mask_store
, NULL
);
630 struct lp_build_tgsi_params params
;
631 memset(¶ms
, 0, sizeof(params
));
635 params
.consts_ptr
= consts_ptr
;
636 params
.const_sizes_ptr
= num_consts_ptr
;
637 params
.system_values
= &system_values
;
638 params
.inputs
= interp
->inputs
;
639 params
.context_ptr
= context_ptr
;
640 params
.thread_data_ptr
= thread_data_ptr
;
641 params
.sampler
= sampler
;
642 params
.info
= &shader
->info
.base
;
643 params
.ssbo_ptr
= ssbo_ptr
;
644 params
.ssbo_sizes_ptr
= num_ssbo_ptr
;
645 params
.image
= image
;
647 /* Build the actual shader */
648 if (shader
->base
.type
== PIPE_SHADER_IR_TGSI
)
649 lp_build_tgsi_soa(gallivm
, tokens
, ¶ms
,
652 lp_build_nir_soa(gallivm
, shader
->base
.ir
.nir
, ¶ms
,
656 if (key
->alpha
.enabled
) {
657 int color0
= find_output_by_semantic(&shader
->info
.base
,
661 if (color0
!= -1 && outputs
[color0
][3]) {
662 const struct util_format_description
*cbuf_format_desc
;
663 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
664 LLVMValueRef alpha_ref_value
;
666 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
667 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
669 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
671 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
672 &mask
, alpha
, alpha_ref_value
,
673 (depth_mode
& LATE_DEPTH_TEST
) != 0);
677 /* Emulate Alpha to Coverage with Alpha test */
678 if (key
->blend
.alpha_to_coverage
) {
679 int color0
= find_output_by_semantic(&shader
->info
.base
,
683 if (color0
!= -1 && outputs
[color0
][3]) {
684 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
686 if (!key
->multisample
) {
687 lp_build_alpha_to_coverage(gallivm
, type
,
689 (depth_mode
& LATE_DEPTH_TEST
) != 0);
691 lp_build_sample_alpha_to_coverage(gallivm
, type
, key
->coverage_samples
, num_loop
,
697 if (key
->blend
.alpha_to_one
&& key
->multisample
) {
698 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
) {
699 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
700 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
701 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
702 if (outputs
[cbuf
][3]) {
703 LLVMBuildStore(builder
, lp_build_const_vec(gallivm
, type
, 1.0), outputs
[cbuf
][3]);
707 if (shader
->info
.base
.writes_samplemask
) {
708 LLVMValueRef output_smask
= NULL
;
709 int smaski
= find_output_by_semantic(&shader
->info
.base
,
710 TGSI_SEMANTIC_SAMPLEMASK
,
712 struct lp_build_context smask_bld
;
713 lp_build_context_init(&smask_bld
, gallivm
, int_type
);
716 output_smask
= LLVMBuildLoad(builder
, outputs
[smaski
][0], "smask");
718 * Pixel is alive according to the first sample in the mask.
720 output_smask
= LLVMBuildBitCast(builder
, output_smask
, smask_bld
.vec_type
, "");
721 if (!key
->multisample
) {
722 output_smask
= lp_build_and(&smask_bld
, output_smask
, smask_bld
.one
);
723 output_smask
= lp_build_cmp(&smask_bld
, PIPE_FUNC_NOTEQUAL
, output_smask
, smask_bld
.zero
);
724 lp_build_mask_update(&mask
, output_smask
);
726 LLVMBuildStore(builder
, output_smask
, out_sample_mask_storage
);
730 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
732 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
733 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
734 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
736 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
737 if(outputs
[attrib
][chan
]) {
738 /* XXX: just initialize outputs to point at colors[] and
741 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
742 LLVMValueRef color_ptr
;
743 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
744 &loop_state
.counter
, 1, "");
745 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
746 LLVMBuildStore(builder
, out
, color_ptr
);
753 if (key
->multisample
) {
754 /* execute depth test for each sample */
755 lp_build_for_loop_begin(&sample_loop_state
, gallivm
,
756 lp_build_const_int32(gallivm
, 0),
757 LLVMIntULT
, lp_build_const_int32(gallivm
, key
->coverage_samples
),
758 lp_build_const_int32(gallivm
, 1));
760 /* load the per-sample coverage mask */
761 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, "");
762 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
763 s_mask_ptr
= LLVMBuildGEP(builder
, mask_store
, &s_mask_idx
, 1, "");
765 /* combine the execution mask post fragment shader with the coverage mask. */
766 s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
767 s_mask
= LLVMBuildAnd(builder
, s_mask
, lp_build_mask_value(&mask
), "");
769 /* if the shader writes sample mask use that */
770 if (shader
->info
.base
.writes_samplemask
) {
771 LLVMValueRef out_smask_idx
= LLVMBuildShl(builder
, lp_build_const_int32(gallivm
, 1), sample_loop_state
.counter
, "");
772 out_smask_idx
= lp_build_broadcast(gallivm
, int_vec_type
, out_smask_idx
);
773 LLVMValueRef output_smask
= LLVMBuildLoad(builder
, out_sample_mask_storage
, "");
774 LLVMValueRef smask_bit
= LLVMBuildAnd(builder
, output_smask
, out_smask_idx
, "");
775 LLVMValueRef cmp
= LLVMBuildICmp(builder
, LLVMIntNE
, smask_bit
, lp_build_const_int_vec(gallivm
, int_type
, 0), "");
776 smask_bit
= LLVMBuildSExt(builder
, cmp
, int_vec_type
, "");
778 s_mask
= LLVMBuildAnd(builder
, s_mask
, smask_bit
, "");
782 depth_ptr
= depth_base_ptr
;
783 if (key
->multisample
) {
784 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_loop_state
.counter
, depth_sample_stride
, "");
785 depth_ptr
= LLVMBuildGEP(builder
, depth_ptr
, &sample_offset
, 1, "");
789 if (depth_mode
& LATE_DEPTH_TEST
) {
790 int pos0
= find_output_by_semantic(&shader
->info
.base
,
791 TGSI_SEMANTIC_POSITION
,
793 int s_out
= find_output_by_semantic(&shader
->info
.base
,
794 TGSI_SEMANTIC_STENCIL
,
796 if (pos0
!= -1 && outputs
[pos0
][2]) {
797 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
800 * Clamp according to ARB_depth_clamp semantics.
802 if (key
->depth_clamp
) {
803 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
807 if (s_out
!= -1 && outputs
[s_out
][1]) {
808 /* there's only one value, and spec says to discard additional bits */
809 LLVMValueRef s_max_mask
= lp_build_const_int_vec(gallivm
, int_type
, 255);
810 stencil_refs
[0] = LLVMBuildLoad(builder
, outputs
[s_out
][1], "output.s");
811 stencil_refs
[0] = LLVMBuildBitCast(builder
, stencil_refs
[0], int_vec_type
, "");
812 stencil_refs
[0] = LLVMBuildAnd(builder
, stencil_refs
[0], s_max_mask
, "");
813 stencil_refs
[1] = stencil_refs
[0];
816 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
817 zs_format_desc
, key
->resource_1d
,
818 depth_ptr
, depth_stride
,
819 &z_fb
, &s_fb
, loop_state
.counter
);
821 lp_build_depth_stencil_test(gallivm
,
826 key
->multisample
? NULL
: &mask
,
834 if (depth_mode
& LATE_DEPTH_WRITE
) {
835 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
836 zs_format_desc
, key
->resource_1d
,
837 NULL
, NULL
, NULL
, loop_state
.counter
,
838 depth_ptr
, depth_stride
,
842 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
843 (depth_mode
& LATE_DEPTH_WRITE
))
845 /* Need to apply a reduced mask to the depth write. Reload the
846 * depth value, update from zs_value with the new mask value and
849 if (key
->multisample
) {
850 z_value
= LLVMBuildBitCast(builder
, lp_build_pointer_get(builder
, z_sample_value_store
, sample_loop_state
.counter
), z_type
, "");;
851 s_value
= lp_build_pointer_get(builder
, s_sample_value_store
, sample_loop_state
.counter
);
852 z_fb
= LLVMBuildBitCast(builder
, lp_build_pointer_get(builder
, z_fb_store
, sample_loop_state
.counter
), z_fb_type
, "");
853 s_fb
= lp_build_pointer_get(builder
, s_fb_store
, sample_loop_state
.counter
);
855 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
856 zs_format_desc
, key
->resource_1d
,
857 key
->multisample
? s_mask
: lp_build_mask_value(&mask
), z_fb
, s_fb
, loop_state
.counter
,
858 depth_ptr
, depth_stride
,
862 if (key
->occlusion_count
) {
863 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
864 lp_build_name(counter
, "counter");
866 lp_build_occlusion_count(gallivm
, type
,
867 key
->multisample
? s_mask
: lp_build_mask_value(&mask
), counter
);
870 if (key
->multisample
) {
871 /* store the sample mask for this loop */
872 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
873 lp_build_for_loop_end(&sample_loop_state
);
876 mask_val
= lp_build_mask_end(&mask
);
877 if (!key
->multisample
)
878 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
879 lp_build_for_loop_end(&loop_state
);
884 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
886 * Fragment Shader outputs pixels in small 2x2 blocks
887 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
889 * However in memory pixels are stored in rows
890 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
892 * @param type fragment shader type (4x or 8x float)
893 * @param num_fs number of fs_src
894 * @param is_1d whether we're outputting to a 1d resource
895 * @param dst_channels number of output channels
896 * @param fs_src output from fragment shader
897 * @param dst pointer to store result
898 * @param pad_inline is channel padding inline or at end of row
899 * @return the number of dsts
902 generate_fs_twiddle(struct gallivm_state
*gallivm
,
905 unsigned dst_channels
,
906 LLVMValueRef fs_src
[][4],
910 LLVMValueRef src
[16];
916 unsigned pixels
= type
.length
/ 4;
917 unsigned reorder_group
;
918 unsigned src_channels
;
922 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
923 src_count
= num_fs
* src_channels
;
925 assert(pixels
== 2 || pixels
== 1);
926 assert(num_fs
* src_channels
<= ARRAY_SIZE(src
));
929 * Transpose from SoA -> AoS
931 for (i
= 0; i
< num_fs
; ++i
) {
932 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
936 * Pick transformation options
943 if (dst_channels
== 1) {
949 } else if (dst_channels
== 2) {
953 } else if (dst_channels
> 2) {
960 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
966 * Split the src in half
969 for (i
= num_fs
; i
> 0; --i
) {
970 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
971 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
979 * Ensure pixels are in memory order
982 /* Twiddle pixels by reordering the array, e.g.:
984 * src_count = 8 -> 0 2 1 3 4 6 5 7
985 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
987 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
989 for (i
= 0; i
< src_count
; ++i
) {
990 unsigned group
= i
/ reorder_group
;
991 unsigned block
= (group
/ 4) * 4 * reorder_group
;
992 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
995 } else if (twiddle
) {
996 /* Twiddle pixels across elements of array */
998 * XXX: we should avoid this in some cases, but would need to tell
999 * lp_build_conv to reorder (or deal with it ourselves).
1001 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
1004 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
1008 * Moves any padding between pixels to the end
1009 * e.g. RGBXRGBX -> RGBRGBXX
1012 unsigned char swizzles
[16];
1013 unsigned elems
= pixels
* dst_channels
;
1015 for (i
= 0; i
< type
.length
; ++i
) {
1017 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
1019 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
1022 for (i
= 0; i
< src_count
; ++i
) {
1023 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
1032 * Untwiddle and transpose, much like the above.
1033 * However, this is after conversion, so we get packed vectors.
1034 * At this time only handle 4x16i8 rgba / 2x16i8 rg / 1x16i8 r data,
1035 * the vectors will look like:
1036 * r0r1r4r5r2r3r6r7r8r9r12... (albeit color channels may
1037 * be swizzled here). Extending to 16bit should be trivial.
1038 * Should also be extended to handle twice wide vectors with AVX2...
1041 fs_twiddle_transpose(struct gallivm_state
*gallivm
,
1042 struct lp_type type
,
1048 struct lp_type type64
, type16
, type32
;
1049 LLVMTypeRef type64_t
, type8_t
, type16_t
, type32_t
;
1050 LLVMBuilderRef builder
= gallivm
->builder
;
1051 LLVMValueRef tmp
[4], shuf
[8];
1052 for (j
= 0; j
< 2; j
++) {
1053 shuf
[j
*4 + 0] = lp_build_const_int32(gallivm
, j
*4 + 0);
1054 shuf
[j
*4 + 1] = lp_build_const_int32(gallivm
, j
*4 + 2);
1055 shuf
[j
*4 + 2] = lp_build_const_int32(gallivm
, j
*4 + 1);
1056 shuf
[j
*4 + 3] = lp_build_const_int32(gallivm
, j
*4 + 3);
1059 assert(src_count
== 4 || src_count
== 2 || src_count
== 1);
1060 assert(type
.width
== 8);
1061 assert(type
.length
== 16);
1063 type8_t
= lp_build_vec_type(gallivm
, type
);
1068 type64_t
= lp_build_vec_type(gallivm
, type64
);
1073 type16_t
= lp_build_vec_type(gallivm
, type16
);
1078 type32_t
= lp_build_vec_type(gallivm
, type32
);
1080 lp_build_transpose_aos_n(gallivm
, type
, src
, src_count
, tmp
);
1082 if (src_count
== 1) {
1083 /* transpose was no-op, just untwiddle */
1084 LLVMValueRef shuf_vec
;
1085 shuf_vec
= LLVMConstVector(shuf
, 8);
1086 tmp
[0] = LLVMBuildBitCast(builder
, src
[0], type16_t
, "");
1087 tmp
[0] = LLVMBuildShuffleVector(builder
, tmp
[0], tmp
[0], shuf_vec
, "");
1088 dst
[0] = LLVMBuildBitCast(builder
, tmp
[0], type8_t
, "");
1089 } else if (src_count
== 2) {
1090 LLVMValueRef shuf_vec
;
1091 shuf_vec
= LLVMConstVector(shuf
, 4);
1093 for (i
= 0; i
< 2; i
++) {
1094 tmp
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type32_t
, "");
1095 tmp
[i
] = LLVMBuildShuffleVector(builder
, tmp
[i
], tmp
[i
], shuf_vec
, "");
1096 dst
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type8_t
, "");
1099 for (j
= 0; j
< 2; j
++) {
1100 LLVMValueRef lo
, hi
, lo2
, hi2
;
1102 * Note that if we only really have 3 valid channels (rgb)
1103 * and we don't need alpha we could substitute a undef here
1104 * for the respective channel (causing llvm to drop conversion
1107 /* we now have rgba0rgba1rgba4rgba5 etc, untwiddle */
1108 lo2
= LLVMBuildBitCast(builder
, tmp
[j
*2], type64_t
, "");
1109 hi2
= LLVMBuildBitCast(builder
, tmp
[j
*2 + 1], type64_t
, "");
1110 lo
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 0);
1111 hi
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 1);
1112 dst
[j
*2] = LLVMBuildBitCast(builder
, lo
, type8_t
, "");
1113 dst
[j
*2 + 1] = LLVMBuildBitCast(builder
, hi
, type8_t
, "");
1120 * Load an unswizzled block of pixels from memory
1123 load_unswizzled_block(struct gallivm_state
*gallivm
,
1124 LLVMValueRef base_ptr
,
1125 LLVMValueRef stride
,
1126 unsigned block_width
,
1127 unsigned block_height
,
1129 struct lp_type dst_type
,
1131 unsigned dst_alignment
)
1133 LLVMBuilderRef builder
= gallivm
->builder
;
1134 unsigned row_size
= dst_count
/ block_height
;
1137 /* Ensure block exactly fits into dst */
1138 assert((block_width
* block_height
) % dst_count
== 0);
1140 for (i
= 0; i
< dst_count
; ++i
) {
1141 unsigned x
= i
% row_size
;
1142 unsigned y
= i
/ row_size
;
1144 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
1145 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
1147 LLVMValueRef gep
[2];
1148 LLVMValueRef dst_ptr
;
1150 gep
[0] = lp_build_const_int32(gallivm
, 0);
1151 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
1153 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
1154 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
,
1155 LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
1157 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
1159 LLVMSetAlignment(dst
[i
], dst_alignment
);
1165 * Store an unswizzled block of pixels to memory
1168 store_unswizzled_block(struct gallivm_state
*gallivm
,
1169 LLVMValueRef base_ptr
,
1170 LLVMValueRef stride
,
1171 unsigned block_width
,
1172 unsigned block_height
,
1174 struct lp_type src_type
,
1176 unsigned src_alignment
)
1178 LLVMBuilderRef builder
= gallivm
->builder
;
1179 unsigned row_size
= src_count
/ block_height
;
1182 /* Ensure src exactly fits into block */
1183 assert((block_width
* block_height
) % src_count
== 0);
1185 for (i
= 0; i
< src_count
; ++i
) {
1186 unsigned x
= i
% row_size
;
1187 unsigned y
= i
/ row_size
;
1189 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
1190 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
1192 LLVMValueRef gep
[2];
1193 LLVMValueRef src_ptr
;
1195 gep
[0] = lp_build_const_int32(gallivm
, 0);
1196 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
1198 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
1199 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
,
1200 LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
1202 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
1204 LLVMSetAlignment(src_ptr
, src_alignment
);
1210 * Checks if a format description is an arithmetic format
1212 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
1214 static inline boolean
1215 is_arithmetic_format(const struct util_format_description
*format_desc
)
1217 boolean arith
= false;
1220 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
1221 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
1222 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
1230 * Checks if this format requires special handling due to required expansion
1231 * to floats for blending, and furthermore has "natural" packed AoS -> unpacked
1234 static inline boolean
1235 format_expands_to_float_soa(const struct util_format_description
*format_desc
)
1237 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
||
1238 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
1246 * Retrieves the type representing the memory layout for a format
1248 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
1251 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
1252 struct lp_type
* type
)
1257 if (format_expands_to_float_soa(format_desc
)) {
1258 /* just make this a uint with width of block */
1259 type
->floating
= false;
1260 type
->fixed
= false;
1263 type
->width
= format_desc
->block
.bits
;
1268 for (i
= 0; i
< 4; i
++)
1269 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1273 memset(type
, 0, sizeof(struct lp_type
));
1274 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1275 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1276 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1277 type
->norm
= format_desc
->channel
[chan
].normalized
;
1279 if (is_arithmetic_format(format_desc
)) {
1283 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
1284 type
->width
+= format_desc
->channel
[i
].size
;
1287 type
->width
= format_desc
->channel
[chan
].size
;
1288 type
->length
= format_desc
->nr_channels
;
1294 * Retrieves the type for a format which is usable in the blending code.
1296 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
1299 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
1300 struct lp_type
* type
)
1305 if (format_expands_to_float_soa(format_desc
)) {
1306 /* always use ordinary floats for blending */
1307 type
->floating
= true;
1308 type
->fixed
= false;
1316 for (i
= 0; i
< 4; i
++)
1317 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1321 memset(type
, 0, sizeof(struct lp_type
));
1322 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1323 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1324 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1325 type
->norm
= format_desc
->channel
[chan
].normalized
;
1326 type
->width
= format_desc
->channel
[chan
].size
;
1327 type
->length
= format_desc
->nr_channels
;
1329 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
1330 if (format_desc
->channel
[i
].size
> type
->width
)
1331 type
->width
= format_desc
->channel
[i
].size
;
1334 if (type
->floating
) {
1337 if (type
->width
<= 8) {
1339 } else if (type
->width
<= 16) {
1346 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
1353 * Scale a normalized value from src_bits to dst_bits.
1355 * The exact calculation is
1357 * dst = iround(src * dst_mask / src_mask)
1359 * or with integer rounding
1361 * dst = src * (2*dst_mask + sign(src)*src_mask) / (2*src_mask)
1365 * src_mask = (1 << src_bits) - 1
1366 * dst_mask = (1 << dst_bits) - 1
1368 * but we try to avoid division and multiplication through shifts.
1370 static inline LLVMValueRef
1371 scale_bits(struct gallivm_state
*gallivm
,
1375 struct lp_type src_type
)
1377 LLVMBuilderRef builder
= gallivm
->builder
;
1378 LLVMValueRef result
= src
;
1380 if (dst_bits
< src_bits
) {
1381 int delta_bits
= src_bits
- dst_bits
;
1383 if (delta_bits
<= dst_bits
) {
1385 * Approximate the rescaling with a single shift.
1387 * This gives the wrong rounding.
1390 result
= LLVMBuildLShr(builder
,
1392 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1397 * Try more accurate rescaling.
1401 * Drop the least significant bits to make space for the multiplication.
1403 * XXX: A better approach would be to use a wider integer type as intermediate. But
1404 * this is enough to convert alpha from 16bits -> 2 when rendering to
1405 * PIPE_FORMAT_R10G10B10A2_UNORM.
1407 result
= LLVMBuildLShr(builder
,
1409 lp_build_const_int_vec(gallivm
, src_type
, dst_bits
),
1413 result
= LLVMBuildMul(builder
,
1415 lp_build_const_int_vec(gallivm
, src_type
, (1LL << dst_bits
) - 1),
1419 * Add a rounding term before the division.
1421 * TODO: Handle signed integers too.
1423 if (!src_type
.sign
) {
1424 result
= LLVMBuildAdd(builder
,
1426 lp_build_const_int_vec(gallivm
, src_type
, (1LL << (delta_bits
- 1))),
1431 * Approximate the division by src_mask with a src_bits shift.
1433 * Given the src has already been shifted by dst_bits, all we need
1434 * to do is to shift by the difference.
1437 result
= LLVMBuildLShr(builder
,
1439 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1443 } else if (dst_bits
> src_bits
) {
1445 int db
= dst_bits
- src_bits
;
1447 /* Shift left by difference in bits */
1448 result
= LLVMBuildShl(builder
,
1450 lp_build_const_int_vec(gallivm
, src_type
, db
),
1453 if (db
<= src_bits
) {
1454 /* Enough bits in src to fill the remainder */
1455 LLVMValueRef lower
= LLVMBuildLShr(builder
,
1457 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
1460 result
= LLVMBuildOr(builder
, result
, lower
, "");
1461 } else if (db
> src_bits
) {
1462 /* Need to repeatedly copy src bits to fill remainder in dst */
1465 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
1466 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
1468 result
= LLVMBuildOr(builder
,
1470 LLVMBuildLShr(builder
, result
, shuv
, ""),
1480 * If RT is a smallfloat (needing denorms) format
1483 have_smallfloat_format(struct lp_type dst_type
,
1484 enum pipe_format format
)
1486 return ((dst_type
.floating
&& dst_type
.width
!= 32) ||
1487 /* due to format handling hacks this format doesn't have floating set
1488 * here (and actually has width set to 32 too) so special case this. */
1489 (format
== PIPE_FORMAT_R11G11B10_FLOAT
));
1494 * Convert from memory format to blending format
1496 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1499 convert_to_blend_type(struct gallivm_state
*gallivm
,
1500 unsigned block_size
,
1501 const struct util_format_description
*src_fmt
,
1502 struct lp_type src_type
,
1503 struct lp_type dst_type
,
1504 LLVMValueRef
* src
, // and dst
1507 LLVMValueRef
*dst
= src
;
1508 LLVMBuilderRef builder
= gallivm
->builder
;
1509 struct lp_type blend_type
;
1510 struct lp_type mem_type
;
1512 unsigned pixels
= block_size
/ num_srcs
;
1516 * full custom path for packed floats and srgb formats - none of the later
1517 * functions would do anything useful, and given the lp_type representation they
1518 * can't be fixed. Should really have some SoA blend path for these kind of
1519 * formats rather than hacking them in here.
1521 if (format_expands_to_float_soa(src_fmt
)) {
1522 LLVMValueRef tmpsrc
[4];
1524 * This is pretty suboptimal for this case blending in SoA would be much
1525 * better, since conversion gets us SoA values so need to convert back.
1527 assert(src_type
.width
== 32 || src_type
.width
== 16);
1528 assert(dst_type
.floating
);
1529 assert(dst_type
.width
== 32);
1530 assert(dst_type
.length
% 4 == 0);
1531 assert(num_srcs
% 4 == 0);
1533 if (src_type
.width
== 16) {
1534 /* expand 4x16bit values to 4x32bit */
1535 struct lp_type type32x4
= src_type
;
1536 LLVMTypeRef ltype32x4
;
1537 unsigned num_fetch
= dst_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1538 type32x4
.width
= 32;
1539 ltype32x4
= lp_build_vec_type(gallivm
, type32x4
);
1540 for (i
= 0; i
< num_fetch
; i
++) {
1541 src
[i
] = LLVMBuildZExt(builder
, src
[i
], ltype32x4
, "");
1543 src_type
.width
= 32;
1545 for (i
= 0; i
< 4; i
++) {
1548 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1549 LLVMValueRef tmpsoa
[4];
1550 LLVMValueRef tmps
= tmpsrc
[i
];
1551 if (dst_type
.length
== 8) {
1552 LLVMValueRef shuffles
[8];
1554 /* fetch was 4 values but need 8-wide output values */
1555 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1557 * for 8-wide aos transpose would give us wrong order not matching
1558 * incoming converted fs values and mask. ARGH.
1560 for (j
= 0; j
< 4; j
++) {
1561 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1562 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1564 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1565 LLVMConstVector(shuffles
, 8), "");
1567 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1568 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1571 lp_build_unpack_rgba_soa(gallivm
, src_fmt
, dst_type
, tmps
, tmpsoa
);
1573 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1578 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1579 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1581 /* Is the format arithmetic */
1582 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1583 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1585 /* Pad if necessary */
1586 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1587 for (i
= 0; i
< num_srcs
; ++i
) {
1588 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1591 src_type
.length
= dst_type
.length
;
1594 /* Special case for half-floats */
1595 if (mem_type
.width
== 16 && mem_type
.floating
) {
1596 assert(blend_type
.width
== 32 && blend_type
.floating
);
1597 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1605 src_type
.width
= blend_type
.width
* blend_type
.length
;
1606 blend_type
.length
*= pixels
;
1607 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1609 for (i
= 0; i
< num_srcs
; ++i
) {
1610 LLVMValueRef chans
[4];
1611 LLVMValueRef res
= NULL
;
1613 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1615 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1617 unsigned sa
= src_fmt
->channel
[j
].shift
;
1618 #if UTIL_ARCH_LITTLE_ENDIAN
1619 unsigned from_lsb
= j
;
1621 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1624 mask
= (1 << src_fmt
->channel
[j
].size
) - 1;
1626 /* Extract bits from source */
1627 chans
[j
] = LLVMBuildLShr(builder
,
1629 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1632 chans
[j
] = LLVMBuildAnd(builder
,
1634 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1638 if (src_type
.norm
) {
1639 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1640 blend_type
.width
, chans
[j
], src_type
);
1643 /* Insert bits into correct position */
1644 chans
[j
] = LLVMBuildShl(builder
,
1646 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1652 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1656 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1662 * Convert from blending format to memory format
1664 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1667 convert_from_blend_type(struct gallivm_state
*gallivm
,
1668 unsigned block_size
,
1669 const struct util_format_description
*src_fmt
,
1670 struct lp_type src_type
,
1671 struct lp_type dst_type
,
1672 LLVMValueRef
* src
, // and dst
1675 LLVMValueRef
* dst
= src
;
1677 struct lp_type mem_type
;
1678 struct lp_type blend_type
;
1679 LLVMBuilderRef builder
= gallivm
->builder
;
1680 unsigned pixels
= block_size
/ num_srcs
;
1684 * full custom path for packed floats and srgb formats - none of the later
1685 * functions would do anything useful, and given the lp_type representation they
1686 * can't be fixed. Should really have some SoA blend path for these kind of
1687 * formats rather than hacking them in here.
1689 if (format_expands_to_float_soa(src_fmt
)) {
1691 * This is pretty suboptimal for this case blending in SoA would be much
1692 * better - we need to transpose the AoS values back to SoA values for
1693 * conversion/packing.
1695 assert(src_type
.floating
);
1696 assert(src_type
.width
== 32);
1697 assert(src_type
.length
% 4 == 0);
1698 assert(dst_type
.width
== 32 || dst_type
.width
== 16);
1700 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1701 LLVMValueRef tmpsoa
[4], tmpdst
;
1702 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1703 /* really really need SoA here */
1705 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1706 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1709 tmpdst
= lp_build_float_to_srgb_packed(gallivm
, src_fmt
,
1713 if (src_type
.length
== 8) {
1714 LLVMValueRef tmpaos
, shuffles
[8];
1717 * for 8-wide aos transpose has given us wrong order not matching
1718 * output order. HMPF. Also need to split the output values manually.
1720 for (j
= 0; j
< 4; j
++) {
1721 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1722 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1724 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1725 LLVMConstVector(shuffles
, 8), "");
1726 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1727 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1733 if (dst_type
.width
== 16) {
1734 struct lp_type type16x8
= dst_type
;
1735 struct lp_type type32x4
= dst_type
;
1736 LLVMTypeRef ltype16x4
, ltypei64
, ltypei128
;
1737 unsigned num_fetch
= src_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1738 type16x8
.length
= 8;
1739 type32x4
.width
= 32;
1740 ltypei128
= LLVMIntTypeInContext(gallivm
->context
, 128);
1741 ltypei64
= LLVMIntTypeInContext(gallivm
->context
, 64);
1742 ltype16x4
= lp_build_vec_type(gallivm
, dst_type
);
1743 /* We could do vector truncation but it doesn't generate very good code */
1744 for (i
= 0; i
< num_fetch
; i
++) {
1745 src
[i
] = lp_build_pack2(gallivm
, type32x4
, type16x8
,
1746 src
[i
], lp_build_zero(gallivm
, type32x4
));
1747 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltypei128
, "");
1748 src
[i
] = LLVMBuildTrunc(builder
, src
[i
], ltypei64
, "");
1749 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltype16x4
, "");
1755 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1756 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1758 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
1760 /* Special case for half-floats */
1761 if (mem_type
.width
== 16 && mem_type
.floating
) {
1762 int length
= dst_type
.length
;
1763 assert(blend_type
.width
== 32 && blend_type
.floating
);
1765 dst_type
.length
= src_type
.length
;
1767 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1769 dst_type
.length
= length
;
1773 /* Remove any padding */
1774 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
1775 src_type
.length
-= (src_type
.length
% mem_type
.length
);
1777 for (i
= 0; i
< num_srcs
; ++i
) {
1778 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
1782 /* No bit arithmetic to do */
1787 src_type
.length
= pixels
;
1788 src_type
.width
= blend_type
.length
* blend_type
.width
;
1789 dst_type
.length
= pixels
;
1791 for (i
= 0; i
< num_srcs
; ++i
) {
1792 LLVMValueRef chans
[4];
1793 LLVMValueRef res
= NULL
;
1795 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1797 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1799 unsigned sa
= src_fmt
->channel
[j
].shift
;
1800 unsigned sz_a
= src_fmt
->channel
[j
].size
;
1801 #if UTIL_ARCH_LITTLE_ENDIAN
1802 unsigned from_lsb
= j
;
1804 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1807 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
1809 for (k
= 0; k
< blend_type
.width
; ++k
) {
1814 chans
[j
] = LLVMBuildLShr(builder
,
1816 lp_build_const_int_vec(gallivm
, src_type
,
1817 from_lsb
* blend_type
.width
),
1820 chans
[j
] = LLVMBuildAnd(builder
,
1822 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1825 /* Scale down bits */
1826 if (src_type
.norm
) {
1827 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
1828 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
1829 } else if (!src_type
.floating
&& sz_a
< blend_type
.width
) {
1830 LLVMValueRef mask_val
= lp_build_const_int_vec(gallivm
, src_type
, (1UL << sz_a
) - 1);
1831 LLVMValueRef mask
= LLVMBuildICmp(builder
, LLVMIntUGT
, chans
[j
], mask_val
, "");
1832 chans
[j
] = LLVMBuildSelect(builder
, mask
, mask_val
, chans
[j
], "");
1836 chans
[j
] = LLVMBuildShl(builder
,
1838 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1841 sa
+= src_fmt
->channel
[j
].size
;
1846 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1850 assert (dst_type
.width
!= 24);
1852 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
1858 * Convert alpha to same blend type as src
1861 convert_alpha(struct gallivm_state
*gallivm
,
1862 struct lp_type row_type
,
1863 struct lp_type alpha_type
,
1864 const unsigned block_size
,
1865 const unsigned block_height
,
1866 const unsigned src_count
,
1867 const unsigned dst_channels
,
1868 const bool pad_inline
,
1869 LLVMValueRef
* src_alpha
)
1871 LLVMBuilderRef builder
= gallivm
->builder
;
1873 unsigned length
= row_type
.length
;
1874 row_type
.length
= alpha_type
.length
;
1876 /* Twiddle the alpha to match pixels */
1877 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
);
1880 * TODO this should use single lp_build_conv call for
1881 * src_count == 1 && dst_channels == 1 case (dropping the concat below)
1883 for (i
= 0; i
< block_height
; ++i
) {
1884 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
1887 alpha_type
= row_type
;
1888 row_type
.length
= length
;
1890 /* If only one channel we can only need the single alpha value per pixel */
1891 if (src_count
== 1 && dst_channels
== 1) {
1893 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
, src_count
);
1895 /* If there are more srcs than rows then we need to split alpha up */
1896 if (src_count
> block_height
) {
1897 for (i
= src_count
; i
> 0; --i
) {
1898 unsigned pixels
= block_size
/ src_count
;
1899 unsigned idx
= i
- 1;
1901 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4],
1902 (idx
* pixels
) % 4, pixels
);
1906 /* If there is a src for each pixel broadcast the alpha across whole row */
1907 if (src_count
== block_size
) {
1908 for (i
= 0; i
< src_count
; ++i
) {
1909 src_alpha
[i
] = lp_build_broadcast(gallivm
,
1910 lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
1913 unsigned pixels
= block_size
/ src_count
;
1914 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
1915 unsigned alpha_span
= 1;
1916 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
1918 /* Check if we need 2 src_alphas for our shuffles */
1919 if (pixels
> alpha_type
.length
) {
1923 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
1924 for (j
= 0; j
< row_type
.length
; ++j
) {
1925 if (j
< pixels
* channels
) {
1926 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
1928 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
1932 for (i
= 0; i
< src_count
; ++i
) {
1933 unsigned idx1
= i
, idx2
= i
;
1935 if (alpha_span
> 1){
1940 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
1943 LLVMConstVector(shuffles
, row_type
.length
),
1952 * Generates the blend function for unswizzled colour buffers
1953 * Also generates the read & write from colour buffer
1956 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
1958 struct lp_fragment_shader_variant
*variant
,
1959 enum pipe_format out_format
,
1960 unsigned int num_fs
,
1961 struct lp_type fs_type
,
1962 LLVMValueRef
* fs_mask
,
1963 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
1964 LLVMValueRef context_ptr
,
1965 LLVMValueRef color_ptr
,
1966 LLVMValueRef stride
,
1967 unsigned partial_mask
,
1970 const unsigned alpha_channel
= 3;
1971 const unsigned block_width
= LP_RASTER_BLOCK_SIZE
;
1972 const unsigned block_height
= LP_RASTER_BLOCK_SIZE
;
1973 const unsigned block_size
= block_width
* block_height
;
1974 const unsigned lp_integer_vector_width
= 128;
1976 LLVMBuilderRef builder
= gallivm
->builder
;
1977 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
1978 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
1979 LLVMValueRef src_alpha
[4 * 4];
1980 LLVMValueRef src1_alpha
[4 * 4] = { NULL
};
1981 LLVMValueRef src_mask
[4 * 4];
1982 LLVMValueRef src
[4 * 4];
1983 LLVMValueRef src1
[4 * 4];
1984 LLVMValueRef dst
[4 * 4];
1985 LLVMValueRef blend_color
;
1986 LLVMValueRef blend_alpha
;
1987 LLVMValueRef i32_zero
;
1988 LLVMValueRef check_mask
;
1989 LLVMValueRef undef_src_val
;
1991 struct lp_build_mask_context mask_ctx
;
1992 struct lp_type mask_type
;
1993 struct lp_type blend_type
;
1994 struct lp_type row_type
;
1995 struct lp_type dst_type
;
1996 struct lp_type ls_type
;
1998 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
1999 unsigned vector_width
;
2000 unsigned src_channels
= TGSI_NUM_CHANNELS
;
2001 unsigned dst_channels
;
2006 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
2008 unsigned dst_alignment
;
2010 bool pad_inline
= is_arithmetic_format(out_format_desc
);
2011 bool has_alpha
= false;
2012 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
2013 util_blend_state_is_dual(&variant
->key
.blend
, 0);
2015 const boolean is_1d
= variant
->key
.resource_1d
;
2016 boolean twiddle_after_convert
= FALSE
;
2017 unsigned num_fullblock_fs
= is_1d
? 2 * num_fs
: num_fs
;
2018 LLVMValueRef fpstate
= 0;
2020 /* Get type from output format */
2021 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
2022 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
2025 * Technically this code should go into lp_build_smallfloat_to_float
2026 * and lp_build_float_to_smallfloat but due to the
2027 * http://llvm.org/bugs/show_bug.cgi?id=6393
2028 * llvm reorders the mxcsr intrinsics in a way that breaks the code.
2029 * So the ordering is important here and there shouldn't be any
2030 * llvm ir instrunctions in this function before
2031 * this, otherwise half-float format conversions won't work
2032 * (again due to llvm bug #6393).
2034 if (have_smallfloat_format(dst_type
, out_format
)) {
2035 /* We need to make sure that denorms are ok for half float
2037 fpstate
= lp_build_fpstate_get(gallivm
);
2038 lp_build_fpstate_set_denorms_zero(gallivm
, FALSE
);
2041 mask_type
= lp_int32_vec4_type();
2042 mask_type
.length
= fs_type
.length
;
2044 for (i
= num_fs
; i
< num_fullblock_fs
; i
++) {
2045 fs_mask
[i
] = lp_build_zero(gallivm
, mask_type
);
2048 /* Do not bother executing code when mask is empty.. */
2050 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
2052 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2053 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
2056 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
2057 lp_build_mask_check(&mask_ctx
);
2060 partial_mask
|= !variant
->opaque
;
2061 i32_zero
= lp_build_const_int32(gallivm
, 0);
2063 undef_src_val
= lp_build_undef(gallivm
, fs_type
);
2065 row_type
.length
= fs_type
.length
;
2066 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
2068 /* Compute correct swizzle and count channels */
2069 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
2072 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
2073 /* Ensure channel is used */
2074 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
2078 /* Ensure not already written to (happens in case with GL_ALPHA) */
2079 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
2083 /* Ensure we havn't already found all channels */
2084 if (dst_channels
>= out_format_desc
->nr_channels
) {
2088 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
2091 if (i
== alpha_channel
) {
2096 if (format_expands_to_float_soa(out_format_desc
)) {
2098 * the code above can't work for layout_other
2099 * for srgb it would sort of work but we short-circuit swizzles, etc.
2100 * as that is done as part of unpack / pack.
2102 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
2108 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
2111 /* If 3 channels then pad to include alpha for 4 element transpose */
2112 if (dst_channels
== 3) {
2113 assert (!has_alpha
);
2114 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
2115 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
2118 if (out_format_desc
->nr_channels
== 4) {
2121 * We use alpha from the color conversion, not separate one.
2122 * We had to include it for transpose, hence it will get converted
2123 * too (albeit when doing transpose after conversion, that would
2124 * no longer be the case necessarily).
2125 * (It works only with 4 channel dsts, e.g. rgbx formats, because
2126 * otherwise we really have padding, not alpha, included.)
2133 * Load shader output
2135 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2136 /* Always load alpha for use in blending */
2139 alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
2142 alpha
= undef_src_val
;
2145 /* Load each channel */
2146 for (j
= 0; j
< dst_channels
; ++j
) {
2147 assert(swizzle
[j
] < 4);
2149 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
2152 fs_src
[i
][j
] = undef_src_val
;
2156 /* If 3 channels then pad to include alpha for 4 element transpose */
2158 * XXX If we include that here maybe could actually use it instead of
2159 * separate alpha for blending?
2160 * (Difficult though we actually convert pad channels, not alpha.)
2162 if (dst_channels
== 3 && !has_alpha
) {
2163 fs_src
[i
][3] = alpha
;
2166 /* We split the row_mask and row_alpha as we want 128bit interleave */
2167 if (fs_type
.length
== 8) {
2168 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
],
2170 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
],
2171 src_channels
, src_channels
);
2173 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
2174 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
2175 src_channels
, src_channels
);
2177 src_mask
[i
] = fs_mask
[i
];
2178 src_alpha
[i
] = alpha
;
2181 if (dual_source_blend
) {
2182 /* same as above except different src/dst, skip masks and comments... */
2183 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2186 alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
2189 alpha
= undef_src_val
;
2192 for (j
= 0; j
< dst_channels
; ++j
) {
2193 assert(swizzle
[j
] < 4);
2195 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
2198 fs_src1
[i
][j
] = undef_src_val
;
2201 if (dst_channels
== 3 && !has_alpha
) {
2202 fs_src1
[i
][3] = alpha
;
2204 if (fs_type
.length
== 8) {
2205 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
2206 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
2207 src_channels
, src_channels
);
2209 src1_alpha
[i
] = alpha
;
2214 if (util_format_is_pure_integer(out_format
)) {
2216 * In this case fs_type was really ints or uints disguised as floats,
2219 fs_type
.floating
= 0;
2220 fs_type
.sign
= dst_type
.sign
;
2221 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2222 for (j
= 0; j
< dst_channels
; ++j
) {
2223 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
2224 lp_build_vec_type(gallivm
, fs_type
), "");
2226 if (dst_channels
== 3 && !has_alpha
) {
2227 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
2228 lp_build_vec_type(gallivm
, fs_type
), "");
2234 * We actually should generally do conversion first (for non-1d cases)
2235 * when the blend format is 8 or 16 bits. The reason is obvious,
2236 * there's 2 or 4 times less vectors to deal with for the interleave...
2237 * Albeit for the AVX (not AVX2) case there's no benefit with 16 bit
2238 * vectors (as it can do 32bit unpack with 256bit vectors, but 8/16bit
2239 * unpack only with 128bit vectors).
2240 * Note: for 16bit sizes really need matching pack conversion code
2242 if (!is_1d
&& dst_channels
!= 3 && dst_type
.width
== 8) {
2243 twiddle_after_convert
= TRUE
;
2247 * Pixel twiddle from fragment shader order to memory order
2249 if (!twiddle_after_convert
) {
2250 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
,
2251 dst_channels
, fs_src
, src
, pad_inline
);
2252 if (dual_source_blend
) {
2253 generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
, dst_channels
,
2254 fs_src1
, src1
, pad_inline
);
2257 src_count
= num_fullblock_fs
* dst_channels
;
2259 * We reorder things a bit here, so the cases for 4-wide and 8-wide
2260 * (AVX) turn out the same later when untwiddling/transpose (albeit
2261 * for true AVX2 path untwiddle needs to be different).
2262 * For now just order by colors first (so we can use unpack later).
2264 for (j
= 0; j
< num_fullblock_fs
; j
++) {
2265 for (i
= 0; i
< dst_channels
; i
++) {
2266 src
[i
*num_fullblock_fs
+ j
] = fs_src
[j
][i
];
2267 if (dual_source_blend
) {
2268 src1
[i
*num_fullblock_fs
+ j
] = fs_src1
[j
][i
];
2274 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
2275 if (src_count
!= num_fullblock_fs
* src_channels
) {
2276 unsigned ds
= src_count
/ (num_fullblock_fs
* src_channels
);
2277 row_type
.length
/= ds
;
2278 fs_type
.length
= row_type
.length
;
2281 blend_type
= row_type
;
2282 mask_type
.length
= 4;
2284 /* Convert src to row_type */
2285 if (dual_source_blend
) {
2286 struct lp_type old_row_type
= row_type
;
2287 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2288 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
2291 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2294 /* If the rows are not an SSE vector, combine them to become SSE size! */
2295 if ((row_type
.width
* row_type
.length
) % 128) {
2296 unsigned bits
= row_type
.width
* row_type
.length
;
2299 assert(src_count
>= (vector_width
/ bits
));
2301 dst_count
= src_count
/ (vector_width
/ bits
);
2303 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
2304 if (dual_source_blend
) {
2305 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
2308 row_type
.length
*= combined
;
2309 src_count
/= combined
;
2311 bits
= row_type
.width
* row_type
.length
;
2312 assert(bits
== 128 || bits
== 256);
2315 if (twiddle_after_convert
) {
2316 fs_twiddle_transpose(gallivm
, row_type
, src
, src_count
, src
);
2317 if (dual_source_blend
) {
2318 fs_twiddle_transpose(gallivm
, row_type
, src1
, src_count
, src1
);
2323 * Blend Colour conversion
2325 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
2326 blend_color
= LLVMBuildPointerCast(builder
, blend_color
,
2327 LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
2328 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
,
2329 &i32_zero
, 1, ""), "");
2332 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
2334 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
2336 * since blending is done with floats, there was no conversion.
2337 * However, the rules according to fixed point renderbuffers still
2338 * apply, that is we must clamp inputs to 0.0/1.0.
2339 * (This would apply to separate alpha conversion too but we currently
2340 * force has_alpha to be true.)
2341 * TODO: should skip this with "fake" blend, since post-blend conversion
2342 * will clamp anyway.
2343 * TODO: could also skip this if fragment color clamping is enabled. We
2344 * don't support it natively so it gets baked into the shader however, so
2345 * can't really tell here.
2347 struct lp_build_context f32_bld
;
2348 assert(row_type
.floating
);
2349 lp_build_context_init(&f32_bld
, gallivm
, row_type
);
2350 for (i
= 0; i
< src_count
; i
++) {
2351 src
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src
[i
]);
2353 if (dual_source_blend
) {
2354 for (i
= 0; i
< src_count
; i
++) {
2355 src1
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src1
[i
]);
2358 /* probably can't be different than row_type but better safe than sorry... */
2359 lp_build_context_init(&f32_bld
, gallivm
, blend_type
);
2360 blend_color
= lp_build_clamp(&f32_bld
, blend_color
, f32_bld
.zero
, f32_bld
.one
);
2364 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
2366 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
2367 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
2369 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
2370 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
2372 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
2373 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
2379 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], block_height
, &src_mask
[0]);
2381 if (src_count
< block_height
) {
2382 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
2383 } else if (src_count
> block_height
) {
2384 for (i
= src_count
; i
> 0; --i
) {
2385 unsigned pixels
= block_size
/ src_count
;
2386 unsigned idx
= i
- 1;
2388 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4],
2389 (idx
* pixels
) % 4, pixels
);
2393 assert(mask_type
.width
== 32);
2395 for (i
= 0; i
< src_count
; ++i
) {
2396 unsigned pixels
= block_size
/ src_count
;
2397 unsigned pixel_width
= row_type
.width
* dst_channels
;
2399 if (pixel_width
== 24) {
2400 mask_type
.width
= 8;
2401 mask_type
.length
= vector_width
/ mask_type
.width
;
2403 mask_type
.length
= pixels
;
2404 mask_type
.width
= row_type
.width
* dst_channels
;
2407 * If mask_type width is smaller than 32bit, this doesn't quite
2408 * generate the most efficient code (could use some pack).
2410 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
],
2411 lp_build_int_vec_type(gallivm
, mask_type
), "");
2413 mask_type
.length
*= dst_channels
;
2414 mask_type
.width
/= dst_channels
;
2417 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
],
2418 lp_build_int_vec_type(gallivm
, mask_type
), "");
2419 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
2426 struct lp_type alpha_type
= fs_type
;
2427 alpha_type
.length
= 4;
2428 convert_alpha(gallivm
, row_type
, alpha_type
,
2429 block_size
, block_height
,
2430 src_count
, dst_channels
,
2431 pad_inline
, src_alpha
);
2432 if (dual_source_blend
) {
2433 convert_alpha(gallivm
, row_type
, alpha_type
,
2434 block_size
, block_height
,
2435 src_count
, dst_channels
,
2436 pad_inline
, src1_alpha
);
2442 * Load dst from memory
2444 if (src_count
< block_height
) {
2445 dst_count
= block_height
;
2447 dst_count
= src_count
;
2450 dst_type
.length
*= block_size
/ dst_count
;
2452 if (format_expands_to_float_soa(out_format_desc
)) {
2454 * we need multiple values at once for the conversion, so can as well
2455 * load them vectorized here too instead of concatenating later.
2456 * (Still need concatenation later for 8-wide vectors).
2458 dst_count
= block_height
;
2459 dst_type
.length
= block_width
;
2463 * Compute the alignment of the destination pointer in bytes
2464 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
2465 * are always aligned by MIN2(16, fetch_width) except for buffers (not
2466 * 1d tex but can't distinguish here) so need to stick with per-pixel
2467 * alignment in this case.
2470 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
2473 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
2475 /* Force power-of-two alignment by extracting only the least-significant-bit */
2476 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
2478 * Resource base and stride pointers are aligned to 16 bytes, so that's
2479 * the maximum alignment we can guarantee
2481 dst_alignment
= MIN2(16, dst_alignment
);
2485 if (dst_count
> src_count
) {
2486 if ((dst_type
.width
== 8 || dst_type
.width
== 16) &&
2487 util_is_power_of_two_or_zero(dst_type
.length
) &&
2488 dst_type
.length
* dst_type
.width
< 128) {
2490 * Never try to load values as 4xi8 which we will then
2491 * concatenate to larger vectors. This gives llvm a real
2492 * headache (the problem is the type legalizer (?) will
2493 * try to load that as 4xi8 zext to 4xi32 to fill the vector,
2494 * then the shuffles to concatenate are more or less impossible
2495 * - llvm is easily capable of generating a sequence of 32
2496 * pextrb/pinsrb instructions for that. Albeit it appears to
2497 * be fixed in llvm 4.0. So, load and concatenate with 32bit
2498 * width to avoid the trouble (16bit seems not as bad, llvm
2499 * probably recognizes the load+shuffle as only one shuffle
2500 * is necessary, but we can do just the same anyway).
2502 ls_type
.length
= dst_type
.length
* dst_type
.width
/ 32;
2508 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2509 dst
, ls_type
, dst_count
/ 4, dst_alignment
);
2510 for (i
= dst_count
/ 4; i
< dst_count
; i
++) {
2511 dst
[i
] = lp_build_undef(gallivm
, ls_type
);
2516 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2517 dst
, ls_type
, dst_count
, dst_alignment
);
2522 * Convert from dst/output format to src/blending format.
2524 * This is necessary as we can only read 1 row from memory at a time,
2525 * so the minimum dst_count will ever be at this point is 4.
2527 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
2528 * this will take the 4 dsts and combine them into 1 src so we can perform blending
2529 * on all 16 pixels in that single vector at once.
2531 if (dst_count
> src_count
) {
2532 if (ls_type
.length
!= dst_type
.length
&& ls_type
.length
== 1) {
2533 LLVMTypeRef elem_type
= lp_build_elem_type(gallivm
, ls_type
);
2534 LLVMTypeRef ls_vec_type
= LLVMVectorType(elem_type
, 1);
2535 for (i
= 0; i
< dst_count
; i
++) {
2536 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
], ls_vec_type
, "");
2540 lp_build_concat_n(gallivm
, ls_type
, dst
, 4, dst
, src_count
);
2542 if (ls_type
.length
!= dst_type
.length
) {
2543 struct lp_type tmp_type
= dst_type
;
2544 tmp_type
.length
= dst_type
.length
* 4 / src_count
;
2545 for (i
= 0; i
< src_count
; i
++) {
2546 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
],
2547 lp_build_vec_type(gallivm
, tmp_type
), "");
2555 /* XXX this is broken for RGB8 formats -
2556 * they get expanded from 12 to 16 elements (to include alpha)
2557 * by convert_to_blend_type then reduced to 15 instead of 12
2558 * by convert_from_blend_type (a simple fix though breaks A8...).
2559 * R16G16B16 also crashes differently however something going wrong
2560 * inside llvm handling npot vector sizes seemingly.
2561 * It seems some cleanup could be done here (like skipping conversion/blend
2564 convert_to_blend_type(gallivm
, block_size
, out_format_desc
, dst_type
,
2565 row_type
, dst
, src_count
);
2568 * FIXME: Really should get logic ops / masks out of generic blend / row
2569 * format. Logic ops will definitely not work on the blend float format
2570 * used for SRGB here and I think OpenGL expects this to work as expected
2571 * (that is incoming values converted to srgb then logic op applied).
2573 for (i
= 0; i
< src_count
; ++i
) {
2574 dst
[i
] = lp_build_blend_aos(gallivm
,
2575 &variant
->key
.blend
,
2580 has_alpha
? NULL
: src_alpha
[i
],
2582 has_alpha
? NULL
: src1_alpha
[i
],
2584 partial_mask
? src_mask
[i
] : NULL
,
2586 has_alpha
? NULL
: blend_alpha
,
2588 pad_inline
? 4 : dst_channels
);
2591 convert_from_blend_type(gallivm
, block_size
, out_format_desc
,
2592 row_type
, dst_type
, dst
, src_count
);
2594 /* Split the blend rows back to memory rows */
2595 if (dst_count
> src_count
) {
2596 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
2598 if (src_count
== 1) {
2599 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2600 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2602 row_type
.length
/= 2;
2606 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
2607 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
2608 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2609 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2611 row_type
.length
/= 2;
2616 * Store blend result to memory
2619 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2620 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
2623 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2624 dst
, dst_type
, dst_count
, dst_alignment
);
2627 if (have_smallfloat_format(dst_type
, out_format
)) {
2628 lp_build_fpstate_set(gallivm
, fpstate
);
2632 lp_build_mask_end(&mask_ctx
);
2638 * Generate the runtime callable function for the whole fragment pipeline.
2639 * Note that the function which we generate operates on a block of 16
2640 * pixels at at time. The block contains 2x2 quads. Each quad contains
2644 generate_fragment(struct llvmpipe_context
*lp
,
2645 struct lp_fragment_shader
*shader
,
2646 struct lp_fragment_shader_variant
*variant
,
2647 unsigned partial_mask
)
2649 struct gallivm_state
*gallivm
= variant
->gallivm
;
2650 struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
2651 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
2653 struct lp_type fs_type
;
2654 struct lp_type blend_type
;
2655 LLVMTypeRef fs_elem_type
;
2656 LLVMTypeRef blend_vec_type
;
2657 LLVMTypeRef arg_types
[15];
2658 LLVMTypeRef func_type
;
2659 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
2660 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
2661 LLVMValueRef context_ptr
;
2664 LLVMValueRef a0_ptr
;
2665 LLVMValueRef dadx_ptr
;
2666 LLVMValueRef dady_ptr
;
2667 LLVMValueRef color_ptr_ptr
;
2668 LLVMValueRef stride_ptr
;
2669 LLVMValueRef color_sample_stride_ptr
;
2670 LLVMValueRef depth_ptr
;
2671 LLVMValueRef depth_stride
;
2672 LLVMValueRef depth_sample_stride
;
2673 LLVMValueRef mask_input
;
2674 LLVMValueRef thread_data_ptr
;
2675 LLVMBasicBlockRef block
;
2676 LLVMBuilderRef builder
;
2677 struct lp_build_sampler_soa
*sampler
;
2678 struct lp_build_image_soa
*image
;
2679 struct lp_build_interp_soa_context interp
;
2680 LLVMValueRef fs_mask
[(16 / 4) * LP_MAX_SAMPLES
];
2681 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2682 LLVMValueRef function
;
2683 LLVMValueRef facing
;
2688 boolean cbuf0_write_all
;
2689 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2690 util_blend_state_is_dual(&key
->blend
, 0);
2692 assert(lp_native_vector_width
/ 32 >= 4);
2694 /* Adjust color input interpolation according to flatshade state:
2696 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2697 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2698 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2700 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2702 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2706 /* check if writes to cbuf[0] are to be copied to all cbufs */
2708 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
];
2710 /* TODO: actually pick these based on the fs and color buffer
2711 * characteristics. */
2713 memset(&fs_type
, 0, sizeof fs_type
);
2714 fs_type
.floating
= TRUE
; /* floating point values */
2715 fs_type
.sign
= TRUE
; /* values are signed */
2716 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2717 fs_type
.width
= 32; /* 32-bit float */
2718 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2720 memset(&blend_type
, 0, sizeof blend_type
);
2721 blend_type
.floating
= FALSE
; /* values are integers */
2722 blend_type
.sign
= FALSE
; /* values are unsigned */
2723 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2724 blend_type
.width
= 8; /* 8-bit ubyte values */
2725 blend_type
.length
= 16; /* 16 elements per vector */
2728 * Generate the function prototype. Any change here must be reflected in
2729 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2732 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2734 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
2736 snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
2737 shader
->no
, variant
->no
, partial_mask
? "partial" : "whole");
2739 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
2740 arg_types
[1] = int32_type
; /* x */
2741 arg_types
[2] = int32_type
; /* y */
2742 arg_types
[3] = int32_type
; /* facing */
2743 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
2744 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
2745 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
2746 arg_types
[7] = LLVMPointerType(LLVMPointerType(int8_type
, 0), 0); /* color */
2747 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
2748 arg_types
[9] = LLVMInt64TypeInContext(gallivm
->context
); /* mask_input */
2749 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
2750 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
2751 arg_types
[12] = int32_type
; /* depth_stride */
2752 arg_types
[13] = LLVMPointerType(int32_type
, 0); /* color sample strides */
2753 arg_types
[14] = int32_type
; /* depth sample stride */
2755 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
2756 arg_types
, ARRAY_SIZE(arg_types
), 0);
2758 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
2759 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
2761 variant
->function
[partial_mask
] = function
;
2763 /* XXX: need to propagate noalias down into color param now we are
2764 * passing a pointer-to-pointer?
2766 for(i
= 0; i
< ARRAY_SIZE(arg_types
); ++i
)
2767 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
2768 lp_add_function_attr(function
, i
+ 1, LP_FUNC_ATTR_NOALIAS
);
2770 context_ptr
= LLVMGetParam(function
, 0);
2771 x
= LLVMGetParam(function
, 1);
2772 y
= LLVMGetParam(function
, 2);
2773 facing
= LLVMGetParam(function
, 3);
2774 a0_ptr
= LLVMGetParam(function
, 4);
2775 dadx_ptr
= LLVMGetParam(function
, 5);
2776 dady_ptr
= LLVMGetParam(function
, 6);
2777 color_ptr_ptr
= LLVMGetParam(function
, 7);
2778 depth_ptr
= LLVMGetParam(function
, 8);
2779 mask_input
= LLVMGetParam(function
, 9);
2780 thread_data_ptr
= LLVMGetParam(function
, 10);
2781 stride_ptr
= LLVMGetParam(function
, 11);
2782 depth_stride
= LLVMGetParam(function
, 12);
2783 color_sample_stride_ptr
= LLVMGetParam(function
, 13);
2784 depth_sample_stride
= LLVMGetParam(function
, 14);
2786 lp_build_name(context_ptr
, "context");
2787 lp_build_name(x
, "x");
2788 lp_build_name(y
, "y");
2789 lp_build_name(a0_ptr
, "a0");
2790 lp_build_name(dadx_ptr
, "dadx");
2791 lp_build_name(dady_ptr
, "dady");
2792 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
2793 lp_build_name(depth_ptr
, "depth");
2794 lp_build_name(mask_input
, "mask_input");
2795 lp_build_name(thread_data_ptr
, "thread_data");
2796 lp_build_name(stride_ptr
, "stride_ptr");
2797 lp_build_name(depth_stride
, "depth_stride");
2798 lp_build_name(color_sample_stride_ptr
, "color_sample_stride_ptr");
2799 lp_build_name(depth_sample_stride
, "depth_sample_stride");
2805 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
2806 builder
= gallivm
->builder
;
2808 LLVMPositionBuilderAtEnd(builder
, block
);
2811 * Must not count ps invocations if there's a null shader.
2812 * (It would be ok to count with null shader if there's d/s tests,
2813 * but only if there's d/s buffers too, which is different
2814 * to implicit rasterization disable which must not depend
2815 * on the d/s buffers.)
2816 * Could use popcount on mask, but pixel accuracy is not required.
2817 * Could disable if there's no stats query, but maybe not worth it.
2819 if (shader
->info
.base
.num_instructions
> 1) {
2820 LLVMValueRef invocs
, val
;
2821 invocs
= lp_jit_thread_data_invocations(gallivm
, thread_data_ptr
);
2822 val
= LLVMBuildLoad(builder
, invocs
, "");
2823 val
= LLVMBuildAdd(builder
, val
,
2824 LLVMConstInt(LLVMInt64TypeInContext(gallivm
->context
), 1, 0),
2826 LLVMBuildStore(builder
, val
, invocs
);
2829 /* code generated texture sampling */
2830 sampler
= lp_llvm_sampler_soa_create(key
->samplers
);
2831 image
= lp_llvm_image_soa_create(lp_fs_variant_key_images(key
));
2833 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
2834 /* for 1d resources only run "upper half" of stamp */
2835 if (key
->resource_1d
)
2839 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
2840 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
2841 LLVMValueRef num_loop_samp
= lp_build_const_int32(gallivm
, num_fs
* key
->coverage_samples
);
2842 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
2843 num_loop_samp
, "mask_store");
2845 LLVMTypeRef flt_type
= LLVMFloatTypeInContext(gallivm
->context
);
2846 LLVMValueRef glob_sample_pos
= LLVMAddGlobal(gallivm
->module
, flt_type
, "");
2847 LLVMValueRef sample_pos_array
;
2849 if (key
->multisample
&& key
->coverage_samples
== 4) {
2850 LLVMValueRef sample_pos_arr
[8];
2851 for (unsigned i
= 0; i
< 4; i
++) {
2852 sample_pos_arr
[i
* 2] = LLVMConstReal(flt_type
, lp_sample_pos_4x
[i
][0]);
2853 sample_pos_arr
[i
* 2 + 1] = LLVMConstReal(flt_type
, lp_sample_pos_4x
[i
][1]);
2855 sample_pos_array
= LLVMConstArray(LLVMFloatTypeInContext(gallivm
->context
), sample_pos_arr
, 8);
2857 LLVMValueRef sample_pos_arr
[2];
2858 sample_pos_arr
[0] = LLVMConstReal(flt_type
, 0.5);
2859 sample_pos_arr
[1] = LLVMConstReal(flt_type
, 0.5);
2860 sample_pos_array
= LLVMConstArray(LLVMFloatTypeInContext(gallivm
->context
), sample_pos_arr
, 2);
2862 LLVMSetInitializer(glob_sample_pos
, sample_pos_array
);
2864 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2865 boolean pixel_center_integer
=
2866 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
];
2869 * The shader input interpolation info is not explicitely baked in the
2870 * shader key, but everything it derives from (TGSI, and flatshade) is
2871 * already included in the shader key.
2873 lp_build_interp_soa_init(&interp
,
2875 shader
->info
.base
.num_inputs
,
2877 pixel_center_integer
,
2878 key
->coverage_samples
, glob_sample_pos
,
2882 a0_ptr
, dadx_ptr
, dady_ptr
,
2885 for (i
= 0; i
< num_fs
; i
++) {
2886 if (key
->multisample
) {
2887 LLVMValueRef smask_val
= LLVMBuildLoad(builder
, lp_jit_context_sample_mask(gallivm
, context_ptr
), "");
2890 * For multisampling, extract the per-sample mask from the incoming 64-bit mask,
2891 * store to the per sample mask storage. Or all of them together to generate
2892 * the fragment shader mask. (sample shading TODO).
2893 * Take the incoming state coverage mask into account.
2895 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
2896 LLVMValueRef sindexi
= lp_build_const_int32(gallivm
, i
+ (s
* num_fs
));
2897 LLVMValueRef sample_mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2898 &sindexi
, 1, "sample_mask_ptr");
2899 LLVMValueRef s_mask
= generate_quad_mask(gallivm
, fs_type
,
2900 i
*fs_type
.length
/4, s
, mask_input
);
2902 LLVMValueRef smask_bit
= LLVMBuildAnd(builder
, smask_val
, lp_build_const_int32(gallivm
, (1 << s
)), "");
2903 LLVMValueRef cmp
= LLVMBuildICmp(builder
, LLVMIntNE
, smask_bit
, lp_build_const_int32(gallivm
, 0), "");
2904 smask_bit
= LLVMBuildSExt(builder
, cmp
, int32_type
, "");
2905 smask_bit
= lp_build_broadcast(gallivm
, mask_type
, smask_bit
);
2907 s_mask
= LLVMBuildAnd(builder
, s_mask
, smask_bit
, "");
2908 LLVMBuildStore(builder
, s_mask
, sample_mask_ptr
);
2912 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2913 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2914 &indexi
, 1, "mask_ptr");
2917 mask
= generate_quad_mask(gallivm
, fs_type
,
2918 i
*fs_type
.length
/4, 0, mask_input
);
2921 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
2923 LLVMBuildStore(builder
, mask
, mask_ptr
);
2927 generate_fs_loop(gallivm
,
2937 mask_store
, /* output */
2941 depth_sample_stride
,
2945 for (i
= 0; i
< num_fs
; i
++) {
2946 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2948 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
2949 int idx
= (i
+ (s
* num_fs
));
2950 LLVMValueRef sindexi
= lp_build_const_int32(gallivm
, idx
);
2951 ptr
= LLVMBuildGEP(builder
, mask_store
, &sindexi
, 1, "");
2953 fs_mask
[idx
] = LLVMBuildLoad(builder
, ptr
, "smask");
2956 /* This is fucked up need to reorganize things */
2957 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2958 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2959 ptr
= LLVMBuildGEP(builder
,
2960 color_store
[cbuf
* !cbuf0_write_all
][chan
],
2962 fs_out_color
[cbuf
][chan
][i
] = ptr
;
2965 if (dual_source_blend
) {
2966 /* only support one dual source blend target hence always use output 1 */
2967 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2968 ptr
= LLVMBuildGEP(builder
,
2969 color_store
[1][chan
],
2971 fs_out_color
[1][chan
][i
] = ptr
;
2977 sampler
->destroy(sampler
);
2978 image
->destroy(image
);
2979 /* Loop over color outputs / color buffers to do blending.
2981 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2982 if (key
->cbuf_format
[cbuf
] != PIPE_FORMAT_NONE
) {
2983 LLVMValueRef color_ptr
;
2984 LLVMValueRef stride
;
2985 LLVMValueRef sample_stride
= NULL
;
2986 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
2988 boolean do_branch
= ((key
->depth
.enabled
2989 || key
->stencil
[0].enabled
2990 || key
->alpha
.enabled
)
2991 && !shader
->info
.base
.uses_kill
);
2993 color_ptr
= LLVMBuildLoad(builder
,
2994 LLVMBuildGEP(builder
, color_ptr_ptr
,
2998 stride
= LLVMBuildLoad(builder
,
2999 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
3002 if (key
->multisample
)
3003 sample_stride
= LLVMBuildLoad(builder
,
3004 LLVMBuildGEP(builder
, color_sample_stride_ptr
,
3005 &index
, 1, ""), "");
3007 for (unsigned s
= 0; s
< key
->cbuf_nr_samples
[cbuf
]; s
++) {
3008 unsigned mask_idx
= num_fs
* (key
->multisample
? s
: 0);
3009 LLVMValueRef out_ptr
= color_ptr
;;
3011 if (key
->multisample
) {
3012 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_stride
, lp_build_const_int32(gallivm
, s
), "");
3013 out_ptr
= LLVMBuildGEP(builder
, out_ptr
, &sample_offset
, 1, "");
3015 out_ptr
= LLVMBuildBitCast(builder
, out_ptr
, LLVMPointerType(blend_vec_type
, 0), "");
3017 lp_build_name(out_ptr
, "color_ptr%d", cbuf
);
3019 generate_unswizzled_blend(gallivm
, cbuf
, variant
,
3020 key
->cbuf_format
[cbuf
],
3021 num_fs
, fs_type
, &fs_mask
[mask_idx
], fs_out_color
,
3022 context_ptr
, out_ptr
, stride
,
3023 partial_mask
, do_branch
);
3028 LLVMBuildRetVoid(builder
);
3030 gallivm_verify_function(gallivm
, function
);
3035 dump_fs_variant_key(struct lp_fragment_shader_variant_key
*key
)
3039 debug_printf("fs variant %p:\n", (void *) key
);
3041 if (key
->flatshade
) {
3042 debug_printf("flatshade = 1\n");
3044 if (key
->multisample
) {
3045 debug_printf("multisample = 1\n");
3046 debug_printf("coverage samples = %d\n", key
->coverage_samples
);
3048 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
3049 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
3050 debug_printf("cbuf nr_samples[%u] = %d\n", i
, key
->cbuf_nr_samples
[i
]);
3052 if (key
->depth
.enabled
|| key
->stencil
[0].enabled
) {
3053 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
3054 debug_printf("depth nr_samples = %d\n", key
->zsbuf_nr_samples
);
3056 if (key
->depth
.enabled
) {
3057 debug_printf("depth.func = %s\n", util_str_func(key
->depth
.func
, TRUE
));
3058 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
3061 for (i
= 0; i
< 2; ++i
) {
3062 if (key
->stencil
[i
].enabled
) {
3063 debug_printf("stencil[%u].func = %s\n", i
, util_str_func(key
->stencil
[i
].func
, TRUE
));
3064 debug_printf("stencil[%u].fail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
3065 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
3066 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
3067 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
3068 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
3072 if (key
->alpha
.enabled
) {
3073 debug_printf("alpha.func = %s\n", util_str_func(key
->alpha
.func
, TRUE
));
3076 if (key
->occlusion_count
) {
3077 debug_printf("occlusion_count = 1\n");
3080 if (key
->blend
.logicop_enable
) {
3081 debug_printf("blend.logicop_func = %s\n", util_str_logicop(key
->blend
.logicop_func
, TRUE
));
3083 else if (key
->blend
.rt
[0].blend_enable
) {
3084 debug_printf("blend.rgb_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
3085 debug_printf("blend.rgb_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
3086 debug_printf("blend.rgb_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
3087 debug_printf("blend.alpha_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
3088 debug_printf("blend.alpha_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
3089 debug_printf("blend.alpha_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
3091 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
3092 if (key
->blend
.alpha_to_coverage
) {
3093 debug_printf("blend.alpha_to_coverage is enabled\n");
3095 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
3096 const struct lp_static_sampler_state
*sampler
= &key
->samplers
[i
].sampler_state
;
3097 debug_printf("sampler[%u] = \n", i
);
3098 debug_printf(" .wrap = %s %s %s\n",
3099 util_str_tex_wrap(sampler
->wrap_s
, TRUE
),
3100 util_str_tex_wrap(sampler
->wrap_t
, TRUE
),
3101 util_str_tex_wrap(sampler
->wrap_r
, TRUE
));
3102 debug_printf(" .min_img_filter = %s\n",
3103 util_str_tex_filter(sampler
->min_img_filter
, TRUE
));
3104 debug_printf(" .min_mip_filter = %s\n",
3105 util_str_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
3106 debug_printf(" .mag_img_filter = %s\n",
3107 util_str_tex_filter(sampler
->mag_img_filter
, TRUE
));
3108 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
3109 debug_printf(" .compare_func = %s\n", util_str_func(sampler
->compare_func
, TRUE
));
3110 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
3111 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
3112 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
3113 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
3114 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
3116 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3117 const struct lp_static_texture_state
*texture
= &key
->samplers
[i
].texture_state
;
3118 debug_printf("texture[%u] = \n", i
);
3119 debug_printf(" .format = %s\n",
3120 util_format_name(texture
->format
));
3121 debug_printf(" .target = %s\n",
3122 util_str_tex_target(texture
->target
, TRUE
));
3123 debug_printf(" .level_zero_only = %u\n",
3124 texture
->level_zero_only
);
3125 debug_printf(" .pot = %u %u %u\n",
3127 texture
->pot_height
,
3128 texture
->pot_depth
);
3130 struct lp_image_static_state
*images
= lp_fs_variant_key_images(key
);
3131 for (i
= 0; i
< key
->nr_images
; ++i
) {
3132 const struct lp_static_texture_state
*image
= &images
[i
].image_state
;
3133 debug_printf("image[%u] = \n", i
);
3134 debug_printf(" .format = %s\n",
3135 util_format_name(image
->format
));
3136 debug_printf(" .target = %s\n",
3137 util_str_tex_target(image
->target
, TRUE
));
3138 debug_printf(" .level_zero_only = %u\n",
3139 image
->level_zero_only
);
3140 debug_printf(" .pot = %u %u %u\n",
3149 lp_debug_fs_variant(struct lp_fragment_shader_variant
*variant
)
3151 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
3152 variant
->shader
->no
, variant
->no
);
3153 if (variant
->shader
->base
.type
== PIPE_SHADER_IR_TGSI
)
3154 tgsi_dump(variant
->shader
->base
.tokens
, 0);
3156 nir_print_shader(variant
->shader
->base
.ir
.nir
, stderr
);
3157 dump_fs_variant_key(&variant
->key
);
3158 debug_printf("variant->opaque = %u\n", variant
->opaque
);
3164 * Generate a new fragment shader variant from the shader code and
3165 * other state indicated by the key.
3167 static struct lp_fragment_shader_variant
*
3168 generate_variant(struct llvmpipe_context
*lp
,
3169 struct lp_fragment_shader
*shader
,
3170 const struct lp_fragment_shader_variant_key
*key
)
3172 struct lp_fragment_shader_variant
*variant
;
3173 const struct util_format_description
*cbuf0_format_desc
= NULL
;
3174 boolean fullcolormask
;
3175 char module_name
[64];
3177 variant
= MALLOC(sizeof *variant
+ shader
->variant_key_size
- sizeof variant
->key
);
3181 memset(variant
, 0, sizeof(*variant
));
3182 snprintf(module_name
, sizeof(module_name
), "fs%u_variant%u",
3183 shader
->no
, shader
->variants_created
);
3185 variant
->gallivm
= gallivm_create(module_name
, lp
->context
);
3186 if (!variant
->gallivm
) {
3191 variant
->shader
= shader
;
3192 variant
->list_item_global
.base
= variant
;
3193 variant
->list_item_local
.base
= variant
;
3194 variant
->no
= shader
->variants_created
++;
3196 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
3199 * Determine whether we are touching all channels in the color buffer.
3201 fullcolormask
= FALSE
;
3202 if (key
->nr_cbufs
== 1) {
3203 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
3204 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
3208 !key
->blend
.logicop_enable
&&
3209 !key
->blend
.rt
[0].blend_enable
&&
3211 !key
->stencil
[0].enabled
&&
3212 !key
->alpha
.enabled
&&
3213 !key
->multisample
&&
3214 !key
->blend
.alpha_to_coverage
&&
3215 !key
->depth
.enabled
&&
3216 !shader
->info
.base
.uses_kill
&&
3217 !shader
->info
.base
.writes_samplemask
3220 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
3221 lp_debug_fs_variant(variant
);
3224 lp_jit_init_types(variant
);
3226 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
3227 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
3229 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
3230 if (variant
->opaque
) {
3231 /* Specialized shader, which doesn't need to read the color buffer. */
3232 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
3237 * Compile everything
3240 gallivm_compile_module(variant
->gallivm
);
3242 variant
->nr_instrs
+= lp_build_count_ir_module(variant
->gallivm
->module
);
3244 if (variant
->function
[RAST_EDGE_TEST
]) {
3245 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
3246 gallivm_jit_function(variant
->gallivm
,
3247 variant
->function
[RAST_EDGE_TEST
]);
3250 if (variant
->function
[RAST_WHOLE
]) {
3251 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
3252 gallivm_jit_function(variant
->gallivm
,
3253 variant
->function
[RAST_WHOLE
]);
3254 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
3255 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
3258 gallivm_free_ir(variant
->gallivm
);
3265 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
3266 const struct pipe_shader_state
*templ
)
3268 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3269 struct lp_fragment_shader
*shader
;
3271 int nr_sampler_views
;
3275 shader
= CALLOC_STRUCT(lp_fragment_shader
);
3279 shader
->no
= fs_no
++;
3280 make_empty_list(&shader
->variants
);
3282 shader
->base
.type
= templ
->type
;
3283 if (templ
->type
== PIPE_SHADER_IR_TGSI
) {
3284 /* get/save the summary info for this shader */
3285 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
3287 /* we need to keep a local copy of the tokens */
3288 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
3290 shader
->base
.ir
.nir
= templ
->ir
.nir
;
3291 nir_tgsi_scan_shader(templ
->ir
.nir
, &shader
->info
.base
, true);
3294 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
3295 if (shader
->draw_data
== NULL
) {
3296 FREE((void *) shader
->base
.tokens
);
3301 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
3302 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
3303 nr_images
= shader
->info
.base
.file_max
[TGSI_FILE_IMAGE
] + 1;
3304 shader
->variant_key_size
= lp_fs_variant_key_size(MAX2(nr_samplers
, nr_sampler_views
), nr_images
);
3306 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
3307 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
3308 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
3309 shader
->inputs
[i
].location
= shader
->info
.base
.input_interpolate_loc
[i
];
3311 switch (shader
->info
.base
.input_interpolate
[i
]) {
3312 case TGSI_INTERPOLATE_CONSTANT
:
3313 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
3315 case TGSI_INTERPOLATE_LINEAR
:
3316 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
3318 case TGSI_INTERPOLATE_PERSPECTIVE
:
3319 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
3321 case TGSI_INTERPOLATE_COLOR
:
3322 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
3329 switch (shader
->info
.base
.input_semantic_name
[i
]) {
3330 case TGSI_SEMANTIC_FACE
:
3331 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
3333 case TGSI_SEMANTIC_POSITION
:
3334 /* Position was already emitted above
3336 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
3337 shader
->inputs
[i
].src_index
= 0;
3341 /* XXX this is a completely pointless index map... */
3342 shader
->inputs
[i
].src_index
= i
+1;
3345 if (LP_DEBUG
& DEBUG_TGSI
) {
3347 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
3348 shader
->no
, (void *) shader
);
3349 tgsi_dump(templ
->tokens
, 0);
3350 debug_printf("usage masks:\n");
3351 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
3352 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
3353 debug_printf(" IN[%u].%s%s%s%s\n",
3355 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
3356 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
3357 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
3358 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
3368 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
3370 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3371 struct lp_fragment_shader
*lp_fs
= (struct lp_fragment_shader
*)fs
;
3372 if (llvmpipe
->fs
== lp_fs
)
3375 draw_bind_fragment_shader(llvmpipe
->draw
,
3376 (lp_fs
? lp_fs
->draw_data
: NULL
));
3378 llvmpipe
->fs
= lp_fs
;
3380 llvmpipe
->dirty
|= LP_NEW_FS
;
3385 * Remove shader variant from two lists: the shader's variant list
3386 * and the context's variant list.
3389 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
3390 struct lp_fragment_shader_variant
*variant
)
3392 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
3393 debug_printf("llvmpipe: del fs #%u var %u v created %u v cached %u "
3394 "v total cached %u inst %u total inst %u\n",
3395 variant
->shader
->no
, variant
->no
,
3396 variant
->shader
->variants_created
,
3397 variant
->shader
->variants_cached
,
3398 lp
->nr_fs_variants
, variant
->nr_instrs
, lp
->nr_fs_instrs
);
3401 gallivm_destroy(variant
->gallivm
);
3403 /* remove from shader's list */
3404 remove_from_list(&variant
->list_item_local
);
3405 variant
->shader
->variants_cached
--;
3407 /* remove from context's list */
3408 remove_from_list(&variant
->list_item_global
);
3409 lp
->nr_fs_variants
--;
3410 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
3417 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
3419 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3420 struct lp_fragment_shader
*shader
= fs
;
3421 struct lp_fs_variant_list_item
*li
;
3423 assert(fs
!= llvmpipe
->fs
);
3426 * XXX: we need to flush the context until we have some sort of reference
3427 * counting in fragment shaders as they may still be binned
3428 * Flushing alone might not sufficient we need to wait on it too.
3430 llvmpipe_finish(pipe
, __FUNCTION__
);
3432 /* Delete all the variants */
3433 li
= first_elem(&shader
->variants
);
3434 while(!at_end(&shader
->variants
, li
)) {
3435 struct lp_fs_variant_list_item
*next
= next_elem(li
);
3436 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
3440 /* Delete draw module's data */
3441 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
3443 if (shader
->base
.ir
.nir
)
3444 ralloc_free(shader
->base
.ir
.nir
);
3445 assert(shader
->variants_cached
== 0);
3446 FREE((void *) shader
->base
.tokens
);
3453 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
3454 enum pipe_shader_type shader
, uint index
,
3455 const struct pipe_constant_buffer
*cb
)
3457 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3458 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
3460 assert(shader
< PIPE_SHADER_TYPES
);
3461 assert(index
< ARRAY_SIZE(llvmpipe
->constants
[shader
]));
3463 /* note: reference counting */
3464 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
3467 if (!(constants
->bind
& PIPE_BIND_CONSTANT_BUFFER
)) {
3468 debug_printf("Illegal set constant without bind flag\n");
3469 constants
->bind
|= PIPE_BIND_CONSTANT_BUFFER
;
3473 if (shader
== PIPE_SHADER_VERTEX
||
3474 shader
== PIPE_SHADER_GEOMETRY
||
3475 shader
== PIPE_SHADER_TESS_CTRL
||
3476 shader
== PIPE_SHADER_TESS_EVAL
) {
3477 /* Pass the constants to the 'draw' module */
3478 const unsigned size
= cb
? cb
->buffer_size
: 0;
3482 data
= (ubyte
*) llvmpipe_resource_data(constants
);
3484 else if (cb
&& cb
->user_buffer
) {
3485 data
= (ubyte
*) cb
->user_buffer
;
3492 data
+= cb
->buffer_offset
;
3494 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
3497 else if (shader
== PIPE_SHADER_COMPUTE
)
3498 llvmpipe
->cs_dirty
|= LP_CSNEW_CONSTANTS
;
3500 llvmpipe
->dirty
|= LP_NEW_FS_CONSTANTS
;
3502 if (cb
&& cb
->user_buffer
) {
3503 pipe_resource_reference(&constants
, NULL
);
3508 llvmpipe_set_shader_buffers(struct pipe_context
*pipe
,
3509 enum pipe_shader_type shader
, unsigned start_slot
,
3510 unsigned count
, const struct pipe_shader_buffer
*buffers
,
3511 unsigned writable_bitmask
)
3513 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3515 for (i
= start_slot
, idx
= 0; i
< start_slot
+ count
; i
++, idx
++) {
3516 const struct pipe_shader_buffer
*buffer
= buffers
? &buffers
[idx
] : NULL
;
3518 util_copy_shader_buffer(&llvmpipe
->ssbos
[shader
][i
], buffer
);
3520 if (shader
== PIPE_SHADER_VERTEX
||
3521 shader
== PIPE_SHADER_GEOMETRY
||
3522 shader
== PIPE_SHADER_TESS_CTRL
||
3523 shader
== PIPE_SHADER_TESS_EVAL
) {
3524 const unsigned size
= buffer
? buffer
->buffer_size
: 0;
3525 const ubyte
*data
= NULL
;
3526 if (buffer
&& buffer
->buffer
)
3527 data
= (ubyte
*) llvmpipe_resource_data(buffer
->buffer
);
3529 data
+= buffer
->buffer_offset
;
3530 draw_set_mapped_shader_buffer(llvmpipe
->draw
, shader
,
3532 } else if (shader
== PIPE_SHADER_COMPUTE
) {
3533 llvmpipe
->cs_dirty
|= LP_CSNEW_SSBOS
;
3534 } else if (shader
== PIPE_SHADER_FRAGMENT
) {
3535 llvmpipe
->dirty
|= LP_NEW_FS_SSBOS
;
3541 llvmpipe_set_shader_images(struct pipe_context
*pipe
,
3542 enum pipe_shader_type shader
, unsigned start_slot
,
3543 unsigned count
, const struct pipe_image_view
*images
)
3545 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3548 draw_flush(llvmpipe
->draw
);
3549 for (i
= start_slot
, idx
= 0; i
< start_slot
+ count
; i
++, idx
++) {
3550 const struct pipe_image_view
*image
= images
? &images
[idx
] : NULL
;
3552 util_copy_image_view(&llvmpipe
->images
[shader
][i
], image
);
3555 llvmpipe
->num_images
[shader
] = start_slot
+ count
;
3556 if (shader
== PIPE_SHADER_VERTEX
||
3557 shader
== PIPE_SHADER_GEOMETRY
||
3558 shader
== PIPE_SHADER_TESS_CTRL
||
3559 shader
== PIPE_SHADER_TESS_EVAL
) {
3560 draw_set_images(llvmpipe
->draw
,
3562 llvmpipe
->images
[shader
],
3563 start_slot
+ count
);
3564 } else if (shader
== PIPE_SHADER_COMPUTE
)
3565 llvmpipe
->cs_dirty
|= LP_CSNEW_IMAGES
;
3567 llvmpipe
->dirty
|= LP_NEW_FS_IMAGES
;
3571 * Return the blend factor equivalent to a destination alpha of one.
3573 static inline unsigned
3574 force_dst_alpha_one(unsigned factor
, boolean clamped_zero
)
3577 case PIPE_BLENDFACTOR_DST_ALPHA
:
3578 return PIPE_BLENDFACTOR_ONE
;
3579 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
3580 return PIPE_BLENDFACTOR_ZERO
;
3581 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
3583 return PIPE_BLENDFACTOR_ZERO
;
3585 return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
;
3593 * We need to generate several variants of the fragment pipeline to match
3594 * all the combinations of the contributing state atoms.
3596 * TODO: there is actually no reason to tie this to context state -- the
3597 * generated code could be cached globally in the screen.
3599 static struct lp_fragment_shader_variant_key
*
3600 make_variant_key(struct llvmpipe_context
*lp
,
3601 struct lp_fragment_shader
*shader
,
3605 struct lp_fragment_shader_variant_key
*key
;
3607 key
= (struct lp_fragment_shader_variant_key
*)store
;
3609 memset(key
, 0, offsetof(struct lp_fragment_shader_variant_key
, samplers
[1]));
3611 if (lp
->framebuffer
.zsbuf
) {
3612 enum pipe_format zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
3613 const struct util_format_description
*zsbuf_desc
=
3614 util_format_description(zsbuf_format
);
3616 if (lp
->depth_stencil
->depth
.enabled
&&
3617 util_format_has_depth(zsbuf_desc
)) {
3618 key
->zsbuf_format
= zsbuf_format
;
3619 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
3621 if (lp
->depth_stencil
->stencil
[0].enabled
&&
3622 util_format_has_stencil(zsbuf_desc
)) {
3623 key
->zsbuf_format
= zsbuf_format
;
3624 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
3626 if (llvmpipe_resource_is_1d(lp
->framebuffer
.zsbuf
->texture
)) {
3627 key
->resource_1d
= TRUE
;
3629 key
->zsbuf_nr_samples
= util_res_sample_count(lp
->framebuffer
.zsbuf
->texture
);
3633 * Propagate the depth clamp setting from the rasterizer state.
3634 * depth_clip == 0 implies depth clamping is enabled.
3636 * When clip_halfz is enabled, then always clamp the depth values.
3638 * XXX: This is incorrect for GL, but correct for d3d10 (depth
3639 * clamp is always active in d3d10, regardless if depth clip is
3641 * (GL has an always-on [0,1] clamp on fs depth output instead
3642 * to ensure the depth values stay in range. Doesn't look like
3643 * we do that, though...)
3645 if (lp
->rasterizer
->clip_halfz
) {
3646 key
->depth_clamp
= 1;
3648 key
->depth_clamp
= (lp
->rasterizer
->depth_clip_near
== 0) ? 1 : 0;
3651 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
3652 if (!lp
->framebuffer
.nr_cbufs
||
3653 !lp
->framebuffer
.cbufs
[0] ||
3654 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
3655 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
3657 if(key
->alpha
.enabled
)
3658 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
3659 /* alpha.ref_value is passed in jit_context */
3661 key
->flatshade
= lp
->rasterizer
->flatshade
;
3662 key
->multisample
= lp
->rasterizer
->multisample
;
3663 if (lp
->active_occlusion_queries
&& !lp
->queries_disabled
) {
3664 key
->occlusion_count
= TRUE
;
3667 if (lp
->framebuffer
.nr_cbufs
) {
3668 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
3671 key
->coverage_samples
= 1;
3672 if (key
->multisample
)
3673 key
->coverage_samples
= util_framebuffer_get_num_samples(&lp
->framebuffer
);
3674 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
3676 if (!key
->blend
.independent_blend_enable
) {
3677 /* we always need independent blend otherwise the fixups below won't work */
3678 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
3679 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
3681 key
->blend
.independent_blend_enable
= 1;
3684 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
3685 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
3687 if (lp
->framebuffer
.cbufs
[i
]) {
3688 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
3689 const struct util_format_description
*format_desc
;
3691 key
->cbuf_format
[i
] = format
;
3692 key
->cbuf_nr_samples
[i
] = util_res_sample_count(lp
->framebuffer
.cbufs
[i
]->texture
);
3695 * Figure out if this is a 1d resource. Note that OpenGL allows crazy
3696 * mixing of 2d textures with height 1 and 1d textures, so make sure
3697 * we pick 1d if any cbuf or zsbuf is 1d.
3699 if (llvmpipe_resource_is_1d(lp
->framebuffer
.cbufs
[i
]->texture
)) {
3700 key
->resource_1d
= TRUE
;
3703 format_desc
= util_format_description(format
);
3704 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
3705 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
3708 * Mask out color channels not present in the color buffer.
3710 blend_rt
->colormask
&= util_format_colormask(format_desc
);
3713 * Disable blend for integer formats.
3715 if (util_format_is_pure_integer(format
)) {
3716 blend_rt
->blend_enable
= 0;
3720 * Our swizzled render tiles always have an alpha channel, but the
3721 * linear render target format often does not, so force here the dst
3724 * This is not a mere optimization. Wrong results will be produced if
3725 * the dst alpha is used, the dst format does not have alpha, and the
3726 * previous rendering was not flushed from the swizzled to linear
3727 * buffer. For example, NonPowTwo DCT.
3729 * TODO: This should be generalized to all channels for better
3730 * performance, but only alpha causes correctness issues.
3732 * Also, force rgb/alpha func/factors match, to make AoS blending
3735 if (format_desc
->swizzle
[3] > PIPE_SWIZZLE_W
||
3736 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
3737 /* Doesn't cover mixed snorm/unorm but can't render to them anyway */
3738 boolean clamped_zero
= !util_format_is_float(format
) &&
3739 !util_format_is_snorm(format
);
3740 blend_rt
->rgb_src_factor
=
3741 force_dst_alpha_one(blend_rt
->rgb_src_factor
, clamped_zero
);
3742 blend_rt
->rgb_dst_factor
=
3743 force_dst_alpha_one(blend_rt
->rgb_dst_factor
, clamped_zero
);
3744 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
3745 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
3746 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
3750 /* no color buffer for this fragment output */
3751 key
->cbuf_format
[i
] = PIPE_FORMAT_NONE
;
3752 key
->cbuf_nr_samples
[i
] = 0;
3753 blend_rt
->colormask
= 0x0;
3754 blend_rt
->blend_enable
= 0;
3758 /* This value will be the same for all the variants of a given shader:
3760 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
3762 struct lp_sampler_static_state
*fs_sampler
;
3764 fs_sampler
= key
->samplers
;
3766 memset(fs_sampler
, 0, MAX2(key
->nr_samplers
, key
->nr_sampler_views
) * sizeof *fs_sampler
);
3768 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
3769 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3770 lp_sampler_static_sampler_state(&fs_sampler
[i
].sampler_state
,
3771 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
3776 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
3777 * are dx10-style? Can't really have mixed opcodes, at least not
3778 * if we want to skip the holes here (without rescanning tgsi).
3780 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
3781 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
3782 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3784 * Note sview may exceed what's representable by file_mask.
3785 * This will still work, the only downside is that not actually
3786 * used views may be included in the shader key.
3788 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1u << (i
& 31))) {
3789 lp_sampler_static_texture_state(&fs_sampler
[i
].texture_state
,
3790 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3795 key
->nr_sampler_views
= key
->nr_samplers
;
3796 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3797 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3798 lp_sampler_static_texture_state(&fs_sampler
[i
].texture_state
,
3799 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3804 struct lp_image_static_state
*lp_image
;
3805 lp_image
= lp_fs_variant_key_images(key
);
3806 key
->nr_images
= shader
->info
.base
.file_max
[TGSI_FILE_IMAGE
] + 1;
3807 for (i
= 0; i
< key
->nr_images
; ++i
) {
3808 if (shader
->info
.base
.file_mask
[TGSI_FILE_IMAGE
] & (1 << i
)) {
3809 lp_sampler_static_texture_state_image(&lp_image
[i
].image_state
,
3810 &lp
->images
[PIPE_SHADER_FRAGMENT
][i
]);
3819 * Update fragment shader state. This is called just prior to drawing
3820 * something when some fragment-related state has changed.
3823 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
3825 struct lp_fragment_shader
*shader
= lp
->fs
;
3826 struct lp_fragment_shader_variant_key
*key
;
3827 struct lp_fragment_shader_variant
*variant
= NULL
;
3828 struct lp_fs_variant_list_item
*li
;
3829 char store
[LP_FS_MAX_VARIANT_KEY_SIZE
];
3831 key
= make_variant_key(lp
, shader
, store
);
3833 /* Search the variants for one which matches the key */
3834 li
= first_elem(&shader
->variants
);
3835 while(!at_end(&shader
->variants
, li
)) {
3836 if(memcmp(&li
->base
->key
, key
, shader
->variant_key_size
) == 0) {
3844 /* Move this variant to the head of the list to implement LRU
3845 * deletion of shader's when we have too many.
3847 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3850 /* variant not found, create it now */
3853 unsigned variants_to_cull
;
3855 if (LP_DEBUG
& DEBUG_FS
) {
3856 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
3859 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
3862 /* First, check if we've exceeded the max number of shader variants.
3863 * If so, free 6.25% of them (the least recently used ones).
3865 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 16 : 0;
3867 if (variants_to_cull
||
3868 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
3869 struct pipe_context
*pipe
= &lp
->pipe
;
3871 if (gallivm_debug
& GALLIVM_DEBUG_PERF
) {
3872 debug_printf("Evicting FS: %u fs variants,\t%u total variants,"
3873 "\t%u instrs,\t%u instrs/variant\n",
3874 shader
->variants_cached
,
3875 lp
->nr_fs_variants
, lp
->nr_fs_instrs
,
3876 lp
->nr_fs_instrs
/ lp
->nr_fs_variants
);
3880 * XXX: we need to flush the context until we have some sort of
3881 * reference counting in fragment shaders as they may still be binned
3882 * Flushing alone might not be sufficient we need to wait on it too.
3884 llvmpipe_finish(pipe
, __FUNCTION__
);
3887 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
3888 * number of shader variants (potentially all of them) could be
3889 * pending for destruction on flush.
3892 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
3893 struct lp_fs_variant_list_item
*item
;
3894 if (is_empty_list(&lp
->fs_variants_list
)) {
3897 item
= last_elem(&lp
->fs_variants_list
);
3900 llvmpipe_remove_shader_variant(lp
, item
->base
);
3905 * Generate the new variant.
3908 variant
= generate_variant(lp
, shader
, key
);
3911 LP_COUNT_ADD(llvm_compile_time
, dt
);
3912 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
3914 /* Put the new variant into the list */
3916 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
3917 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3918 lp
->nr_fs_variants
++;
3919 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
3920 shader
->variants_cached
++;
3924 /* Bind this variant */
3925 lp_setup_set_fs_variant(lp
->setup
, variant
);
3933 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
3935 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
3936 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
3937 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
3939 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;
3941 llvmpipe
->pipe
.set_shader_buffers
= llvmpipe_set_shader_buffers
;
3942 llvmpipe
->pipe
.set_shader_images
= llvmpipe_set_shader_images
;