1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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/u_format.h"
66 #include "util/u_dump.h"
67 #include "util/u_string.h"
68 #include "util/u_simple_list.h"
69 #include "util/u_dual_blend.h"
70 #include "os/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_swizzle.h"
84 #include "gallivm/lp_bld_flow.h"
85 #include "gallivm/lp_bld_debug.h"
86 #include "gallivm/lp_bld_arit.h"
87 #include "gallivm/lp_bld_pack.h"
88 #include "gallivm/lp_bld_format.h"
89 #include "gallivm/lp_bld_quad.h"
91 #include "lp_bld_alpha.h"
92 #include "lp_bld_blend.h"
93 #include "lp_bld_depth.h"
94 #include "lp_bld_interp.h"
95 #include "lp_context.h"
100 #include "lp_tex_sample.h"
101 #include "lp_flush.h"
102 #include "lp_state_fs.h"
105 /** Fragment shader number (for debugging) */
106 static unsigned fs_no
= 0;
110 * Expand the relevant bits of mask_input to a n*4-dword mask for the
111 * n*four pixels in n 2x2 quads. This will set the n*four elements of the
112 * quad mask vector to 0 or ~0.
113 * Grouping is 01, 23 for 2 quad mode hence only 0 and 2 are valid
114 * quad arguments with fs length 8.
116 * \param first_quad which quad(s) of the quad group to test, in [0,3]
117 * \param mask_input bitwise mask for the whole 4x4 stamp
120 generate_quad_mask(struct gallivm_state
*gallivm
,
121 struct lp_type fs_type
,
123 LLVMValueRef mask_input
) /* int32 */
125 LLVMBuilderRef builder
= gallivm
->builder
;
126 struct lp_type mask_type
;
127 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
128 LLVMValueRef bits
[16];
133 * XXX: We'll need a different path for 16 x u8
135 assert(fs_type
.width
== 32);
136 assert(fs_type
.length
<= Elements(bits
));
137 mask_type
= lp_int_type(fs_type
);
140 * mask_input >>= (quad * 4)
142 switch (first_quad
) {
147 assert(fs_type
.length
== 4);
154 assert(fs_type
.length
== 4);
162 mask_input
= LLVMBuildLShr(builder
,
164 LLVMConstInt(i32t
, shift
, 0),
168 * mask = { mask_input & (1 << i), for i in [0,3] }
170 mask
= lp_build_broadcast(gallivm
,
171 lp_build_vec_type(gallivm
, mask_type
),
174 for (i
= 0; i
< fs_type
.length
/ 4; i
++) {
175 unsigned j
= 2 * (i
% 2) + (i
/ 2) * 8;
176 bits
[4*i
+ 0] = LLVMConstInt(i32t
, 1 << (j
+ 0), 0);
177 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1 << (j
+ 1), 0);
178 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1 << (j
+ 4), 0);
179 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1 << (j
+ 5), 0);
181 mask
= LLVMBuildAnd(builder
, mask
, LLVMConstVector(bits
, fs_type
.length
), "");
184 * mask = mask != 0 ? ~0 : 0
186 mask
= lp_build_compare(gallivm
,
187 mask_type
, PIPE_FUNC_NOTEQUAL
,
189 lp_build_const_int_vec(gallivm
, mask_type
, 0));
195 #define EARLY_DEPTH_TEST 0x1
196 #define LATE_DEPTH_TEST 0x2
197 #define EARLY_DEPTH_WRITE 0x4
198 #define LATE_DEPTH_WRITE 0x8
201 find_output_by_semantic( const struct tgsi_shader_info
*info
,
207 for (i
= 0; i
< info
->num_outputs
; i
++)
208 if (info
->output_semantic_name
[i
] == semantic
&&
209 info
->output_semantic_index
[i
] == index
)
217 * Generate the fragment shader, depth/stencil test, and alpha tests.
218 * \param i which quad in the tile, in range [0,3]
219 * \param partial_mask if 1, do mask_input testing
222 generate_fs(struct gallivm_state
*gallivm
,
223 struct lp_fragment_shader
*shader
,
224 const struct lp_fragment_shader_variant_key
*key
,
225 LLVMBuilderRef builder
,
227 LLVMValueRef context_ptr
,
229 struct lp_build_interp_soa_context
*interp
,
230 struct lp_build_sampler_soa
*sampler
,
232 LLVMValueRef (*color
)[4],
233 LLVMValueRef depth_ptr
,
235 unsigned partial_mask
,
236 LLVMValueRef mask_input
,
237 LLVMValueRef thread_data_ptr
)
239 const struct util_format_description
*zs_format_desc
= NULL
;
240 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
241 LLVMTypeRef vec_type
;
242 LLVMValueRef consts_ptr
;
243 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
245 LLVMValueRef zs_value
= NULL
;
246 LLVMValueRef stencil_refs
[2];
247 struct lp_build_mask_context mask
;
248 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
249 shader
->info
.base
.num_inputs
< 3 &&
250 shader
->info
.base
.num_instructions
< 8);
251 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
252 util_blend_state_is_dual(&key
->blend
, 0);
257 struct lp_bld_tgsi_system_values system_values
;
259 memset(&system_values
, 0, sizeof(system_values
));
261 if (key
->depth
.enabled
||
262 key
->stencil
[0].enabled
||
263 key
->stencil
[1].enabled
) {
265 zs_format_desc
= util_format_description(key
->zsbuf_format
);
266 assert(zs_format_desc
);
268 if (!shader
->info
.base
.writes_z
) {
269 if (key
->alpha
.enabled
|| shader
->info
.base
.uses_kill
)
270 /* With alpha test and kill, can do the depth test early
271 * and hopefully eliminate some quads. But need to do a
272 * special deferred depth write once the final mask value
275 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
277 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
280 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
283 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
284 !(key
->stencil
[0].enabled
&& key
->stencil
[0].writemask
))
285 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
293 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
294 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
296 vec_type
= lp_build_vec_type(gallivm
, type
);
298 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
300 memset(outputs
, 0, sizeof outputs
);
302 /* Declare the color and z variables */
303 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
304 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
305 color
[cbuf
][chan
] = lp_build_alloca(gallivm
, vec_type
, "color");
308 if (dual_source_blend
) {
309 assert(key
->nr_cbufs
<= 1);
310 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
311 color
[1][chan
] = lp_build_alloca(gallivm
, vec_type
, "color1");
315 /* do triangle edge testing */
317 *pmask
= generate_quad_mask(gallivm
, type
,
318 i
*type
.length
/4, mask_input
);
321 *pmask
= lp_build_const_int_vec(gallivm
, type
, ~0);
324 /* 'mask' will control execution based on quad's pixel alive/killed state */
325 lp_build_mask_begin(&mask
, gallivm
, type
, *pmask
);
327 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
328 lp_build_mask_check(&mask
);
330 lp_build_interp_soa_update_pos(interp
, gallivm
, i
*type
.length
/4);
333 if (depth_mode
& EARLY_DEPTH_TEST
) {
334 lp_build_depth_stencil_test(gallivm
,
346 if (depth_mode
& EARLY_DEPTH_WRITE
) {
347 lp_build_depth_write(gallivm
, type
, zs_format_desc
, depth_ptr
, zs_value
);
351 lp_build_interp_soa_update_inputs(interp
, gallivm
, i
*type
.length
/4);
353 /* Build the actual shader */
354 lp_build_tgsi_soa(gallivm
, tokens
, type
, &mask
,
355 consts_ptr
, &system_values
,
357 outputs
, sampler
, &shader
->info
.base
, NULL
);
360 if (key
->alpha
.enabled
) {
361 int color0
= find_output_by_semantic(&shader
->info
.base
,
365 if (color0
!= -1 && outputs
[color0
][3]) {
366 const struct util_format_description
*cbuf_format_desc
;
367 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
368 LLVMValueRef alpha_ref_value
;
370 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
371 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
373 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
375 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
376 &mask
, alpha
, alpha_ref_value
,
377 (depth_mode
& LATE_DEPTH_TEST
) != 0);
382 if (depth_mode
& LATE_DEPTH_TEST
) {
383 int pos0
= find_output_by_semantic(&shader
->info
.base
,
384 TGSI_SEMANTIC_POSITION
,
387 if (pos0
!= -1 && outputs
[pos0
][2]) {
388 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
391 lp_build_depth_stencil_test(gallivm
,
403 if (depth_mode
& LATE_DEPTH_WRITE
) {
404 lp_build_depth_write(gallivm
, type
, zs_format_desc
, depth_ptr
, zs_value
);
407 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
408 (depth_mode
& LATE_DEPTH_WRITE
))
410 /* Need to apply a reduced mask to the depth write. Reload the
411 * depth value, update from zs_value with the new mask value and
414 lp_build_deferred_depth_write(gallivm
,
424 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
426 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
427 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
428 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
430 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
431 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
432 if(outputs
[attrib
][chan
]) {
433 /* XXX: just initialize outputs to point at colors[] and
436 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
437 lp_build_name(out
, "color%u.%u.%c", i
, attrib
, "rgba"[chan
]);
438 LLVMBuildStore(builder
, out
, color
[cbuf
][chan
]);
444 if (key
->occlusion_count
) {
445 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
446 lp_build_name(counter
, "counter");
447 lp_build_occlusion_count(gallivm
, type
,
448 lp_build_mask_value(&mask
), counter
);
451 *pmask
= lp_build_mask_end(&mask
);
456 * Generate the fragment shader, depth/stencil test, and alpha tests.
459 generate_fs_loop(struct gallivm_state
*gallivm
,
460 struct lp_fragment_shader
*shader
,
461 const struct lp_fragment_shader_variant_key
*key
,
462 LLVMBuilderRef builder
,
464 LLVMValueRef context_ptr
,
465 LLVMValueRef num_loop
,
466 struct lp_build_interp_soa_context
*interp
,
467 struct lp_build_sampler_soa
*sampler
,
468 LLVMValueRef mask_store
,
469 LLVMValueRef (*out_color
)[4],
470 LLVMValueRef depth_ptr
,
473 LLVMValueRef thread_data_ptr
)
475 const struct util_format_description
*zs_format_desc
= NULL
;
476 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
477 LLVMTypeRef vec_type
;
478 LLVMValueRef mask_ptr
, mask_val
;
479 LLVMValueRef consts_ptr
;
481 LLVMValueRef zs_value
= NULL
;
482 LLVMValueRef stencil_refs
[2];
483 LLVMValueRef depth_ptr_i
;
484 LLVMValueRef depth_offset
;
485 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
486 struct lp_build_for_loop_state loop_state
;
487 struct lp_build_mask_context mask
;
488 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
489 shader
->info
.base
.num_inputs
< 3 &&
490 shader
->info
.base
.num_instructions
< 8);
491 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
492 util_blend_state_is_dual(&key
->blend
, 0);
498 struct lp_bld_tgsi_system_values system_values
;
500 memset(&system_values
, 0, sizeof(system_values
));
502 if (key
->depth
.enabled
||
503 key
->stencil
[0].enabled
||
504 key
->stencil
[1].enabled
) {
506 zs_format_desc
= util_format_description(key
->zsbuf_format
);
507 assert(zs_format_desc
);
509 if (!shader
->info
.base
.writes_z
) {
510 if (key
->alpha
.enabled
|| shader
->info
.base
.uses_kill
)
511 /* With alpha test and kill, can do the depth test early
512 * and hopefully eliminate some quads. But need to do a
513 * special deferred depth write once the final mask value
516 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
518 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
521 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
524 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
525 !(key
->stencil
[0].enabled
&& key
->stencil
[0].writemask
))
526 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
533 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
534 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
536 vec_type
= lp_build_vec_type(gallivm
, type
);
538 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
540 lp_build_for_loop_begin(&loop_state
, gallivm
,
541 lp_build_const_int32(gallivm
, 0),
544 lp_build_const_int32(gallivm
, 1));
546 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
547 &loop_state
.counter
, 1, "mask_ptr");
548 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
550 depth_offset
= LLVMBuildMul(builder
, loop_state
.counter
,
551 lp_build_const_int32(gallivm
, depth_bits
* type
.length
),
554 depth_ptr_i
= LLVMBuildGEP(builder
, depth_ptr
, &depth_offset
, 1, "");
556 memset(outputs
, 0, sizeof outputs
);
558 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
559 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
560 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
561 lp_build_vec_type(gallivm
,
566 if (dual_source_blend
) {
567 assert(key
->nr_cbufs
<= 1);
568 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
569 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
570 lp_build_vec_type(gallivm
,
577 /* 'mask' will control execution based on quad's pixel alive/killed state */
578 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
580 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
581 lp_build_mask_check(&mask
);
583 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
);
586 if (depth_mode
& EARLY_DEPTH_TEST
) {
587 lp_build_depth_stencil_test(gallivm
,
599 if (depth_mode
& EARLY_DEPTH_WRITE
) {
600 lp_build_depth_write(gallivm
, type
, zs_format_desc
, depth_ptr_i
, zs_value
);
604 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
);
606 /* Build the actual shader */
607 lp_build_tgsi_soa(gallivm
, tokens
, type
, &mask
,
608 consts_ptr
, &system_values
,
610 outputs
, sampler
, &shader
->info
.base
, NULL
);
613 if (key
->alpha
.enabled
) {
614 int color0
= find_output_by_semantic(&shader
->info
.base
,
618 if (color0
!= -1 && outputs
[color0
][3]) {
619 const struct util_format_description
*cbuf_format_desc
;
620 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
621 LLVMValueRef alpha_ref_value
;
623 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
624 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
626 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
628 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
629 &mask
, alpha
, alpha_ref_value
,
630 (depth_mode
& LATE_DEPTH_TEST
) != 0);
635 if (depth_mode
& LATE_DEPTH_TEST
) {
636 int pos0
= find_output_by_semantic(&shader
->info
.base
,
637 TGSI_SEMANTIC_POSITION
,
640 if (pos0
!= -1 && outputs
[pos0
][2]) {
641 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
644 lp_build_depth_stencil_test(gallivm
,
656 if (depth_mode
& LATE_DEPTH_WRITE
) {
657 lp_build_depth_write(gallivm
, type
, zs_format_desc
, depth_ptr_i
, zs_value
);
660 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
661 (depth_mode
& LATE_DEPTH_WRITE
))
663 /* Need to apply a reduced mask to the depth write. Reload the
664 * depth value, update from zs_value with the new mask value and
667 lp_build_deferred_depth_write(gallivm
,
677 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
679 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
680 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
681 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
683 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
684 if(outputs
[attrib
][chan
]) {
685 /* XXX: just initialize outputs to point at colors[] and
688 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
689 LLVMValueRef color_ptr
;
690 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
691 &loop_state
.counter
, 1, "");
692 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
693 LLVMBuildStore(builder
, out
, color_ptr
);
699 if (key
->occlusion_count
) {
700 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
701 lp_build_name(counter
, "counter");
702 lp_build_occlusion_count(gallivm
, type
,
703 lp_build_mask_value(&mask
), counter
);
706 mask_val
= lp_build_mask_end(&mask
);
707 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
708 lp_build_for_loop_end(&loop_state
);
713 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
715 * Fragment Shader outputs pixels in small 2x2 blocks
716 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
718 * However in memory pixels are stored in rows
719 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
721 * @param type fragment shader type (4x or 8x float)
722 * @param num_fs number of fs_src
723 * @param dst_channels number of output channels
724 * @param fs_src output from fragment shader
725 * @param dst pointer to store result
726 * @param pad_inline is channel padding inline or at end of row
727 * @return the number of dsts
730 generate_fs_twiddle(struct gallivm_state
*gallivm
,
733 unsigned dst_channels
,
734 LLVMValueRef fs_src
[][4],
738 LLVMValueRef src
[16];
744 unsigned pixels
= num_fs
== 4 ? 1 : 2;
745 unsigned reorder_group
;
746 unsigned src_channels
;
750 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
751 src_count
= num_fs
* src_channels
;
753 assert(pixels
== 2 || num_fs
== 4);
754 assert(num_fs
* src_channels
<= Elements(src
));
757 * Transpose from SoA -> AoS
759 for (i
= 0; i
< num_fs
; ++i
) {
760 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
764 * Pick transformation options
771 if (dst_channels
== 1) {
777 } else if (dst_channels
== 2) {
781 } else if (dst_channels
> 2) {
788 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
794 * Split the src in half
797 for (i
= num_fs
; i
> 0; --i
) {
798 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
799 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
807 * Ensure pixels are in memory order
810 /* Twiddle pixels by reordering the array, e.g.:
812 * src_count = 8 -> 0 2 1 3 4 6 5 7
813 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
815 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
817 for (i
= 0; i
< src_count
; ++i
) {
818 unsigned group
= i
/ reorder_group
;
819 unsigned block
= (group
/ 4) * 4 * reorder_group
;
820 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
823 } else if (twiddle
) {
824 /* Twiddle pixels across elements of array */
825 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
828 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
832 * Moves any padding between pixels to the end
833 * e.g. RGBXRGBX -> RGBRGBXX
836 unsigned char swizzles
[16];
837 unsigned elems
= pixels
* dst_channels
;
839 for (i
= 0; i
< type
.length
; ++i
) {
841 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
843 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
846 for (i
= 0; i
< src_count
; ++i
) {
847 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
856 * Load an unswizzled block of pixels from memory
859 load_unswizzled_block(struct gallivm_state
*gallivm
,
860 LLVMValueRef base_ptr
,
862 unsigned block_width
,
863 unsigned block_height
,
865 struct lp_type dst_type
,
867 unsigned dst_alignment
)
869 LLVMBuilderRef builder
= gallivm
->builder
;
870 unsigned row_size
= dst_count
/ block_height
;
873 /* Ensure block exactly fits into dst */
874 assert((block_width
* block_height
) % dst_count
== 0);
876 for (i
= 0; i
< dst_count
; ++i
) {
877 unsigned x
= i
% row_size
;
878 unsigned y
= i
/ row_size
;
880 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
881 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
884 LLVMValueRef dst_ptr
;
886 gep
[0] = lp_build_const_int32(gallivm
, 0);
887 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
889 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
890 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
, LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
892 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
894 lp_set_load_alignment(dst
[i
], dst_alignment
);
900 * Store an unswizzled block of pixels to memory
903 store_unswizzled_block(struct gallivm_state
*gallivm
,
904 LLVMValueRef base_ptr
,
906 unsigned block_width
,
907 unsigned block_height
,
909 struct lp_type src_type
,
911 unsigned src_alignment
)
913 LLVMBuilderRef builder
= gallivm
->builder
;
914 unsigned row_size
= src_count
/ block_height
;
917 /* Ensure src exactly fits into block */
918 assert((block_width
* block_height
) % src_count
== 0);
920 for (i
= 0; i
< src_count
; ++i
) {
921 unsigned x
= i
% row_size
;
922 unsigned y
= i
/ row_size
;
924 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
925 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
928 LLVMValueRef src_ptr
;
930 gep
[0] = lp_build_const_int32(gallivm
, 0);
931 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
933 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
934 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
, LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
936 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
938 lp_set_store_alignment(src_ptr
, src_alignment
);
944 * Checks if a format description is an arithmetic format
946 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
948 static INLINE boolean
949 is_arithmetic_format(const struct util_format_description
*format_desc
)
951 boolean arith
= false;
954 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
955 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
956 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
964 * Retrieves the type representing the memory layout for a format
966 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
969 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
970 struct lp_type
* type
)
975 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
976 /* just make this a 32bit uint */
977 type
->floating
= false;
986 for (i
= 0; i
< 4; i
++)
987 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
991 memset(type
, 0, sizeof(struct lp_type
));
992 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
993 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
994 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
995 type
->norm
= format_desc
->channel
[chan
].normalized
;
997 if (is_arithmetic_format(format_desc
)) {
1001 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
1002 type
->width
+= format_desc
->channel
[i
].size
;
1005 type
->width
= format_desc
->channel
[chan
].size
;
1006 type
->length
= format_desc
->nr_channels
;
1012 * Retrieves the type for a format which is usable in the blending code.
1014 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
1017 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
1018 struct lp_type
* type
)
1023 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1024 /* always use ordinary floats for blending */
1025 type
->floating
= true;
1026 type
->fixed
= false;
1034 for (i
= 0; i
< 4; i
++)
1035 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1039 memset(type
, 0, sizeof(struct lp_type
));
1040 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1041 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1042 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1043 type
->norm
= format_desc
->channel
[chan
].normalized
;
1044 type
->width
= format_desc
->channel
[chan
].size
;
1045 type
->length
= format_desc
->nr_channels
;
1047 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
1048 if (format_desc
->channel
[i
].size
> type
->width
)
1049 type
->width
= format_desc
->channel
[i
].size
;
1052 if (type
->floating
) {
1055 if (type
->width
<= 8) {
1057 } else if (type
->width
<= 16) {
1064 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
1071 * Scale a normalized value from src_bits to dst_bits
1073 static INLINE LLVMValueRef
1074 scale_bits(struct gallivm_state
*gallivm
,
1078 struct lp_type src_type
)
1080 LLVMBuilderRef builder
= gallivm
->builder
;
1081 LLVMValueRef result
= src
;
1083 if (dst_bits
< src_bits
) {
1084 /* Scale down by LShr */
1085 result
= LLVMBuildLShr(builder
,
1087 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- dst_bits
),
1089 } else if (dst_bits
> src_bits
) {
1091 int db
= dst_bits
- src_bits
;
1093 /* Shift left by difference in bits */
1094 result
= LLVMBuildShl(builder
,
1096 lp_build_const_int_vec(gallivm
, src_type
, db
),
1099 if (db
< src_bits
) {
1100 /* Enough bits in src to fill the remainder */
1101 LLVMValueRef lower
= LLVMBuildLShr(builder
,
1103 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
1106 result
= LLVMBuildOr(builder
, result
, lower
, "");
1107 } else if (db
> src_bits
) {
1108 /* Need to repeatedly copy src bits to fill remainder in dst */
1111 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
1112 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
1114 result
= LLVMBuildOr(builder
,
1116 LLVMBuildLShr(builder
, result
, shuv
, ""),
1127 * Convert from memory format to blending format
1129 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1132 convert_to_blend_type(struct gallivm_state
*gallivm
,
1133 const struct util_format_description
*src_fmt
,
1134 struct lp_type src_type
,
1135 struct lp_type dst_type
,
1136 LLVMValueRef
* src
, // and dst
1139 LLVMValueRef
*dst
= src
;
1140 LLVMBuilderRef builder
= gallivm
->builder
;
1141 struct lp_type blend_type
;
1142 struct lp_type mem_type
;
1144 unsigned pixels
= 16 / num_srcs
;
1148 * full custom path for packed floats - none of the later functions would do
1149 * anything useful, and given the lp_type representation they can't be fixed.
1151 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1152 LLVMValueRef tmpsrc
[4];
1154 * This is pretty suboptimal for this case blending in SoA would be much
1155 * better, since conversion gets us SoA values so need to convert back.
1157 assert(src_type
.width
== 32);
1158 assert(dst_type
.floating
);
1159 assert(dst_type
.width
== 32);
1160 assert(dst_type
.length
% 4 == 0);
1161 for (i
= 0; i
< 4; i
++) {
1164 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1165 LLVMValueRef tmpsoa
[4];
1166 LLVMValueRef tmps
= tmpsrc
[i
];
1167 if (num_srcs
== 8) {
1168 LLVMValueRef shuffles
[8];
1170 /* fetch was 4 values but need 8-wide output values */
1171 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1173 * for 8-wide aos transpose would give us wrong order not matching
1174 * incoming converted fs values and mask. ARGH.
1176 for (j
= 0; j
< 4; j
++) {
1177 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1178 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1180 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1181 LLVMConstVector(shuffles
, 8), "");
1183 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1184 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1189 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1190 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1192 /* Is the format arithmetic */
1193 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1194 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1196 /* Pad if necessary */
1197 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1198 for (i
= 0; i
< num_srcs
; ++i
) {
1199 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1202 src_type
.length
= dst_type
.length
;
1205 /* Special case for half-floats */
1206 if (mem_type
.width
== 16 && mem_type
.floating
) {
1207 assert(blend_type
.width
== 32 && blend_type
.floating
);
1208 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1216 src_type
.width
= blend_type
.width
* blend_type
.length
;
1217 blend_type
.length
*= pixels
;
1218 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1220 for (i
= 0; i
< num_srcs
; ++i
) {
1221 LLVMValueRef chans
[4];
1222 LLVMValueRef res
= NULL
;
1225 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1227 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1230 for (k
= 0; k
< src_fmt
->channel
[j
].size
; ++k
) {
1234 /* Extract bits from source */
1235 chans
[j
] = LLVMBuildLShr(builder
,
1237 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1240 chans
[j
] = LLVMBuildAnd(builder
,
1242 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1246 if (src_type
.norm
) {
1247 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1248 blend_type
.width
, chans
[j
], src_type
);
1251 /* Insert bits into correct position */
1252 chans
[j
] = LLVMBuildShl(builder
,
1254 lp_build_const_int_vec(gallivm
, src_type
, j
* blend_type
.width
),
1257 sa
+= src_fmt
->channel
[j
].size
;
1262 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1266 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1272 * Convert from blending format to memory format
1274 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1277 convert_from_blend_type(struct gallivm_state
*gallivm
,
1278 const struct util_format_description
*src_fmt
,
1279 struct lp_type src_type
,
1280 struct lp_type dst_type
,
1281 LLVMValueRef
* src
, // and dst
1284 LLVMValueRef
* dst
= src
;
1286 struct lp_type mem_type
;
1287 struct lp_type blend_type
;
1288 LLVMBuilderRef builder
= gallivm
->builder
;
1289 unsigned pixels
= 16 / num_srcs
;
1293 * full custom path for packed floats - none of the later functions would do
1294 * anything useful, and given the lp_type representation they can't be fixed.
1296 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1298 * This is pretty suboptimal for this case blending in SoA would be much
1299 * better - we need to transpose the AoS values back to SoA values for
1300 * conversion/packing.
1302 assert(src_type
.floating
);
1303 assert(src_type
.width
== 32);
1304 assert(src_type
.length
% 4 == 0);
1305 assert(dst_type
.width
== 32);
1306 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1307 LLVMValueRef tmpsoa
[4], tmpdst
;
1308 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1309 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1310 if (num_srcs
== 8) {
1311 LLVMValueRef tmpaos
, shuffles
[8];
1314 * for 8-wide aos transpose has given us wrong order not matching
1315 * output order. HMPF. Also need to split the output values manually.
1317 for (j
= 0; j
< 4; j
++) {
1318 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1319 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1321 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1322 LLVMConstVector(shuffles
, 8), "");
1323 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1324 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1333 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1334 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1336 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
1338 /* Special case for half-floats */
1339 if (mem_type
.width
== 16 && mem_type
.floating
) {
1340 int length
= dst_type
.length
;
1341 assert(blend_type
.width
== 32 && blend_type
.floating
);
1343 dst_type
.length
= src_type
.length
;
1345 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1347 dst_type
.length
= length
;
1351 /* Remove any padding */
1352 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
1353 src_type
.length
-= (src_type
.length
% mem_type
.length
);
1355 for (i
= 0; i
< num_srcs
; ++i
) {
1356 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
1360 /* No bit arithmetic to do */
1365 src_type
.length
= pixels
;
1366 src_type
.width
= blend_type
.length
* blend_type
.width
;
1367 dst_type
.length
= pixels
;
1369 for (i
= 0; i
< num_srcs
; ++i
) {
1370 LLVMValueRef chans
[4];
1371 LLVMValueRef res
= NULL
;
1374 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1376 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1379 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
1381 for (k
= 0; k
< blend_type
.width
; ++k
) {
1386 chans
[j
] = LLVMBuildLShr(builder
,
1388 lp_build_const_int_vec(gallivm
, src_type
, j
* blend_type
.width
),
1391 chans
[j
] = LLVMBuildAnd(builder
,
1393 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1396 /* Scale down bits */
1397 if (src_type
.norm
) {
1398 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
1399 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
1403 chans
[j
] = LLVMBuildShl(builder
,
1405 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1408 sa
+= src_fmt
->channel
[j
].size
;
1413 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1417 assert (dst_type
.width
!= 24);
1419 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
1425 * Convert alpha to same blend type as src
1428 convert_alpha(struct gallivm_state
*gallivm
,
1429 struct lp_type row_type
,
1430 struct lp_type alpha_type
,
1431 const unsigned block_size
,
1432 const unsigned block_height
,
1433 const unsigned src_count
,
1434 const unsigned dst_channels
,
1435 const bool pad_inline
,
1436 LLVMValueRef
* src_alpha
)
1438 LLVMBuilderRef builder
= gallivm
->builder
;
1440 unsigned length
= row_type
.length
;
1441 row_type
.length
= alpha_type
.length
;
1443 /* Twiddle the alpha to match pixels */
1444 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, 4, src_alpha
);
1446 for (i
= 0; i
< 4; ++i
) {
1447 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
1450 alpha_type
= row_type
;
1451 row_type
.length
= length
;
1453 /* If only one channel we can only need the single alpha value per pixel */
1454 if (src_count
== 1) {
1455 assert(dst_channels
== 1);
1457 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, 4, src_alpha
, src_count
);
1459 /* If there are more srcs than rows then we need to split alpha up */
1460 if (src_count
> block_height
) {
1461 for (i
= src_count
; i
> 0; --i
) {
1462 unsigned pixels
= block_size
/ src_count
;
1463 unsigned idx
= i
- 1;
1465 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4], (idx
* pixels
) % 4, pixels
);
1469 /* If there is a src for each pixel broadcast the alpha across whole row */
1470 if (src_count
== block_size
) {
1471 for (i
= 0; i
< src_count
; ++i
) {
1472 src_alpha
[i
] = lp_build_broadcast(gallivm
, lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
1475 unsigned pixels
= block_size
/ src_count
;
1476 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
1477 unsigned alpha_span
= 1;
1478 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
1480 /* Check if we need 2 src_alphas for our shuffles */
1481 if (pixels
> alpha_type
.length
) {
1485 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
1486 for (j
= 0; j
< row_type
.length
; ++j
) {
1487 if (j
< pixels
* channels
) {
1488 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
1490 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
1494 for (i
= 0; i
< src_count
; ++i
) {
1495 unsigned idx1
= i
, idx2
= i
;
1497 if (alpha_span
> 1){
1502 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
1505 LLVMConstVector(shuffles
, row_type
.length
),
1514 * Generates the blend function for unswizzled colour buffers
1515 * Also generates the read & write from colour buffer
1518 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
1520 struct lp_fragment_shader_variant
*variant
,
1521 enum pipe_format out_format
,
1522 unsigned int num_fs
,
1523 struct lp_type fs_type
,
1524 LLVMValueRef
* fs_mask
,
1525 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
1526 LLVMValueRef context_ptr
,
1527 LLVMValueRef color_ptr
,
1528 LLVMValueRef stride
,
1529 unsigned partial_mask
,
1532 const unsigned alpha_channel
= 3;
1533 const unsigned block_width
= 4;
1534 const unsigned block_height
= 4;
1535 const unsigned block_size
= block_width
* block_height
;
1536 const unsigned lp_integer_vector_width
= 128;
1538 LLVMBuilderRef builder
= gallivm
->builder
;
1539 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
1540 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
1541 LLVMValueRef src_alpha
[4 * 4];
1542 LLVMValueRef src1_alpha
[4 * 4];
1543 LLVMValueRef src_mask
[4 * 4];
1544 LLVMValueRef src
[4 * 4];
1545 LLVMValueRef src1
[4 * 4];
1546 LLVMValueRef dst
[4 * 4];
1547 LLVMValueRef blend_color
;
1548 LLVMValueRef blend_alpha
;
1549 LLVMValueRef i32_zero
;
1550 LLVMValueRef check_mask
;
1552 struct lp_build_mask_context mask_ctx
;
1553 struct lp_type mask_type
;
1554 struct lp_type blend_type
;
1555 struct lp_type row_type
;
1556 struct lp_type dst_type
;
1558 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
1559 unsigned vector_width
;
1560 unsigned src_channels
= TGSI_NUM_CHANNELS
;
1561 unsigned dst_channels
;
1566 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
1568 unsigned dst_alignment
;
1570 bool pad_inline
= is_arithmetic_format(out_format_desc
);
1571 bool has_alpha
= false;
1572 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
1573 util_blend_state_is_dual(&variant
->key
.blend
, 0);
1575 mask_type
= lp_int32_vec4_type();
1576 mask_type
.length
= fs_type
.length
;
1578 /* Compute the alignment of the destination pointer in bytes */
1580 dst_alignment
= (block_width
* out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
1582 /* FIXME -- currently we're fetching pixels one by one, instead of row by row */
1583 dst_alignment
= (1 * out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
1585 /* Force power-of-two alignment by extracting only the least-significant-bit */
1586 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
1587 /* Resource base and stride pointers are aligned to 16 bytes, so that's the maximum alignment we can guarantee */
1588 dst_alignment
= MIN2(dst_alignment
, 16);
1590 /* Do not bother executing code when mask is empty.. */
1592 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
1594 for (i
= 0; i
< num_fs
; ++i
) {
1595 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
1598 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
1599 lp_build_mask_check(&mask_ctx
);
1602 partial_mask
|= !variant
->opaque
;
1603 i32_zero
= lp_build_const_int32(gallivm
, 0);
1605 /* Get type from output format */
1606 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
1607 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
1609 row_type
.length
= fs_type
.length
;
1610 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
1612 /* Compute correct swizzle and count channels */
1613 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
1616 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
1617 /* Ensure channel is used */
1618 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
1622 /* Ensure not already written to (happens in case with GL_ALPHA) */
1623 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
1627 /* Ensure we havn't already found all channels */
1628 if (dst_channels
>= out_format_desc
->nr_channels
) {
1632 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
1635 if (i
== alpha_channel
) {
1640 if (out_format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1641 /* the code above can't work for layout_other */
1642 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
1648 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
1651 /* If 3 channels then pad to include alpha for 4 element transpose */
1652 if (dst_channels
== 3 && !has_alpha
) {
1653 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
1654 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
1657 if (out_format_desc
->nr_channels
== 4) {
1663 * Load shader output
1665 for (i
= 0; i
< num_fs
; ++i
) {
1666 /* Always load alpha for use in blending */
1667 LLVMValueRef alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
1669 /* Load each channel */
1670 for (j
= 0; j
< dst_channels
; ++j
) {
1671 assert(swizzle
[j
] < 4);
1672 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
1675 /* If 3 channels then pad to include alpha for 4 element transpose */
1677 * XXX If we include that here maybe could actually use it instead of
1678 * separate alpha for blending?
1680 if (dst_channels
== 3 && !has_alpha
) {
1681 fs_src
[i
][3] = alpha
;
1684 /* We split the row_mask and row_alpha as we want 128bit interleave */
1685 if (fs_type
.length
== 8) {
1686 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
], 0, src_channels
);
1687 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
], src_channels
, src_channels
);
1689 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1690 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
, src_channels
, src_channels
);
1692 src_mask
[i
] = fs_mask
[i
];
1693 src_alpha
[i
] = alpha
;
1696 if (dual_source_blend
) {
1697 /* same as above except different src/dst, skip masks and comments... */
1698 for (i
= 0; i
< num_fs
; ++i
) {
1699 LLVMValueRef alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
1701 for (j
= 0; j
< dst_channels
; ++j
) {
1702 assert(swizzle
[j
] < 4);
1703 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
1705 if (dst_channels
== 3 && !has_alpha
) {
1706 fs_src1
[i
][3] = alpha
;
1708 if (fs_type
.length
== 8) {
1709 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1710 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
, src_channels
, src_channels
);
1712 src1_alpha
[i
] = alpha
;
1717 if (util_format_is_pure_integer(out_format
)) {
1719 * In this case fs_type was really ints or uints disguised as floats,
1722 fs_type
.floating
= 0;
1723 fs_type
.sign
= dst_type
.sign
;
1724 for (i
= 0; i
< num_fs
; ++i
) {
1725 for (j
= 0; j
< dst_channels
; ++j
) {
1726 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
1727 lp_build_vec_type(gallivm
, fs_type
), "");
1729 if (dst_channels
== 3 && !has_alpha
) {
1730 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
1731 lp_build_vec_type(gallivm
, fs_type
), "");
1737 * Pixel twiddle from fragment shader order to memory order
1739 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fs
, dst_channels
, fs_src
, src
, pad_inline
);
1740 if (dual_source_blend
) {
1741 generate_fs_twiddle(gallivm
, fs_type
, num_fs
, dst_channels
, fs_src1
, src1
, pad_inline
);
1744 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
1745 if (src_count
!= num_fs
* src_channels
) {
1746 unsigned ds
= src_count
/ (num_fs
* src_channels
);
1747 row_type
.length
/= ds
;
1748 fs_type
.length
= row_type
.length
;
1751 blend_type
= row_type
;
1752 mask_type
.length
= 4;
1754 /* Convert src to row_type */
1755 if (dual_source_blend
) {
1756 struct lp_type old_row_type
= row_type
;
1757 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
1758 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
1761 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
1764 /* If the rows are not an SSE vector, combine them to become SSE size! */
1765 if ((row_type
.width
* row_type
.length
) % 128) {
1766 unsigned bits
= row_type
.width
* row_type
.length
;
1769 dst_count
= src_count
/ (vector_width
/ bits
);
1770 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
1771 if (dual_source_blend
) {
1772 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
1775 row_type
.length
*= combined
;
1776 src_count
/= combined
;
1778 bits
= row_type
.width
* row_type
.length
;
1779 assert(bits
== 128 || bits
== 256);
1784 * Blend Colour conversion
1786 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
1787 blend_color
= LLVMBuildPointerCast(builder
, blend_color
, LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
1788 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
, &i32_zero
, 1, ""), "");
1791 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
1794 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
1796 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
1797 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
1799 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
1800 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
1802 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
1803 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
1809 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], 4, &src_mask
[0]);
1811 if (src_count
< block_height
) {
1812 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
1813 } else if (src_count
> block_height
) {
1814 for (i
= src_count
; i
> 0; --i
) {
1815 unsigned pixels
= block_size
/ src_count
;
1816 unsigned idx
= i
- 1;
1818 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4], (idx
* pixels
) % 4, pixels
);
1822 assert(mask_type
.width
== 32);
1824 for (i
= 0; i
< src_count
; ++i
) {
1825 unsigned pixels
= block_size
/ src_count
;
1826 unsigned pixel_width
= row_type
.width
* dst_channels
;
1828 if (pixel_width
== 24) {
1829 mask_type
.width
= 8;
1830 mask_type
.length
= vector_width
/ mask_type
.width
;
1832 mask_type
.length
= pixels
;
1833 mask_type
.width
= row_type
.width
* dst_channels
;
1835 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
], lp_build_int_vec_type(gallivm
, mask_type
), "");
1837 mask_type
.length
*= dst_channels
;
1838 mask_type
.width
/= dst_channels
;
1841 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
], lp_build_int_vec_type(gallivm
, mask_type
), "");
1842 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
1849 struct lp_type alpha_type
= fs_type
;
1850 alpha_type
.length
= 4;
1851 convert_alpha(gallivm
, row_type
, alpha_type
,
1852 block_size
, block_height
,
1853 src_count
, dst_channels
,
1854 pad_inline
, src_alpha
);
1855 if (dual_source_blend
) {
1856 convert_alpha(gallivm
, row_type
, alpha_type
,
1857 block_size
, block_height
,
1858 src_count
, dst_channels
,
1859 pad_inline
, src1_alpha
);
1865 * Load dst from memory
1867 if (src_count
< block_height
) {
1868 dst_count
= block_height
;
1870 dst_count
= src_count
;
1873 dst_type
.length
*= 16 / dst_count
;
1875 if (out_format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1877 * we need multiple values at once for the conversion, so can as well
1878 * load them vectorized here too instead of concatenating later.
1879 * (Still need concatenation later for 8-wide vectors).
1881 dst_count
= block_height
;
1882 dst_type
.length
= block_width
;
1885 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
1886 dst
, dst_type
, dst_count
, dst_alignment
);
1890 * Convert from dst/output format to src/blending format.
1892 * This is necessary as we can only read 1 row from memory at a time,
1893 * so the minimum dst_count will ever be at this point is 4.
1895 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
1896 * this will take the 4 dsts and combine them into 1 src so we can perform blending
1897 * on all 16 pixels in that single vector at once.
1899 if (dst_count
> src_count
) {
1900 lp_build_concat_n(gallivm
, dst_type
, dst
, 4, dst
, src_count
);
1906 /* XXX this is broken for RGB8 formats -
1907 * they get expanded from 12 to 16 elements (to include alpha)
1908 * by convert_to_blend_type then reduced to 15 instead of 12
1909 * by convert_from_blend_type (a simple fix though breaks A8...).
1910 * R16G16B16 also crashes differently however something going wrong
1911 * inside llvm handling npot vector sizes seemingly.
1912 * It seems some cleanup could be done here (like skipping conversion/blend
1915 convert_to_blend_type(gallivm
, out_format_desc
, dst_type
, row_type
, dst
, src_count
);
1917 for (i
= 0; i
< src_count
; ++i
) {
1918 dst
[i
] = lp_build_blend_aos(gallivm
,
1919 &variant
->key
.blend
,
1924 has_alpha
? NULL
: src_alpha
[i
],
1926 has_alpha
? NULL
: src1_alpha
[i
],
1928 partial_mask
? src_mask
[i
] : NULL
,
1930 has_alpha
? NULL
: blend_alpha
,
1932 pad_inline
? 4 : dst_channels
);
1935 convert_from_blend_type(gallivm
, out_format_desc
, row_type
, dst_type
, dst
, src_count
);
1937 /* Split the blend rows back to memory rows */
1938 if (dst_count
> src_count
) {
1939 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
1941 if (src_count
== 1) {
1942 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
1943 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
1945 row_type
.length
/= 2;
1949 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
1950 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
1951 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
1952 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
1954 row_type
.length
/= 2;
1960 * Store blend result to memory
1962 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
1963 dst
, dst_type
, dst_count
, dst_alignment
);
1966 lp_build_mask_end(&mask_ctx
);
1972 * Generate the runtime callable function for the whole fragment pipeline.
1973 * Note that the function which we generate operates on a block of 16
1974 * pixels at at time. The block contains 2x2 quads. Each quad contains
1978 generate_fragment(struct llvmpipe_context
*lp
,
1979 struct lp_fragment_shader
*shader
,
1980 struct lp_fragment_shader_variant
*variant
,
1981 unsigned partial_mask
)
1983 struct gallivm_state
*gallivm
= variant
->gallivm
;
1984 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
1985 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
1986 char func_name
[256];
1987 struct lp_type fs_type
;
1988 struct lp_type blend_type
;
1989 LLVMTypeRef fs_elem_type
;
1990 LLVMTypeRef blend_vec_type
;
1991 LLVMTypeRef arg_types
[12];
1992 LLVMTypeRef func_type
;
1993 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
1994 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
1995 LLVMValueRef context_ptr
;
1998 LLVMValueRef a0_ptr
;
1999 LLVMValueRef dadx_ptr
;
2000 LLVMValueRef dady_ptr
;
2001 LLVMValueRef color_ptr_ptr
;
2002 LLVMValueRef stride_ptr
;
2003 LLVMValueRef depth_ptr
;
2004 LLVMValueRef mask_input
;
2005 LLVMValueRef thread_data_ptr
;
2006 LLVMBasicBlockRef block
;
2007 LLVMBuilderRef builder
;
2008 struct lp_build_sampler_soa
*sampler
;
2009 struct lp_build_interp_soa_context interp
;
2010 LLVMValueRef fs_mask
[16 / 4];
2011 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2012 LLVMValueRef function
;
2013 LLVMValueRef facing
;
2014 const struct util_format_description
*zs_format_desc
;
2019 boolean cbuf0_write_all
;
2020 boolean try_loop
= TRUE
;
2021 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2022 util_blend_state_is_dual(&key
->blend
, 0);
2024 assert(lp_native_vector_width
/ 32 >= 4);
2026 /* Adjust color input interpolation according to flatshade state:
2028 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2029 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2030 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2032 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2034 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2038 /* check if writes to cbuf[0] are to be copied to all cbufs */
2039 cbuf0_write_all
= FALSE
;
2040 for (i
= 0;i
< shader
->info
.base
.num_properties
; i
++) {
2041 if (shader
->info
.base
.properties
[i
].name
==
2042 TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
) {
2043 cbuf0_write_all
= TRUE
;
2048 /* TODO: actually pick these based on the fs and color buffer
2049 * characteristics. */
2051 memset(&fs_type
, 0, sizeof fs_type
);
2052 fs_type
.floating
= TRUE
; /* floating point values */
2053 fs_type
.sign
= TRUE
; /* values are signed */
2054 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2055 fs_type
.width
= 32; /* 32-bit float */
2056 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2057 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
2059 memset(&blend_type
, 0, sizeof blend_type
);
2060 blend_type
.floating
= FALSE
; /* values are integers */
2061 blend_type
.sign
= FALSE
; /* values are unsigned */
2062 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2063 blend_type
.width
= 8; /* 8-bit ubyte values */
2064 blend_type
.length
= 16; /* 16 elements per vector */
2067 * Generate the function prototype. Any change here must be reflected in
2068 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2071 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2073 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
2075 util_snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
2076 shader
->no
, variant
->no
, partial_mask
? "partial" : "whole");
2078 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
2079 arg_types
[1] = int32_type
; /* x */
2080 arg_types
[2] = int32_type
; /* y */
2081 arg_types
[3] = int32_type
; /* facing */
2082 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
2083 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
2084 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
2085 arg_types
[7] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
2086 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
2087 arg_types
[9] = int32_type
; /* mask_input */
2088 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
2089 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
2091 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
2092 arg_types
, Elements(arg_types
), 0);
2094 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
2095 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
2097 variant
->function
[partial_mask
] = function
;
2099 /* XXX: need to propagate noalias down into color param now we are
2100 * passing a pointer-to-pointer?
2102 for(i
= 0; i
< Elements(arg_types
); ++i
)
2103 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
2104 LLVMAddAttribute(LLVMGetParam(function
, i
), LLVMNoAliasAttribute
);
2106 context_ptr
= LLVMGetParam(function
, 0);
2107 x
= LLVMGetParam(function
, 1);
2108 y
= LLVMGetParam(function
, 2);
2109 facing
= LLVMGetParam(function
, 3);
2110 a0_ptr
= LLVMGetParam(function
, 4);
2111 dadx_ptr
= LLVMGetParam(function
, 5);
2112 dady_ptr
= LLVMGetParam(function
, 6);
2113 color_ptr_ptr
= LLVMGetParam(function
, 7);
2114 depth_ptr
= LLVMGetParam(function
, 8);
2115 mask_input
= LLVMGetParam(function
, 9);
2116 thread_data_ptr
= LLVMGetParam(function
, 10);
2117 stride_ptr
= LLVMGetParam(function
, 11);
2119 lp_build_name(context_ptr
, "context");
2120 lp_build_name(x
, "x");
2121 lp_build_name(y
, "y");
2122 lp_build_name(a0_ptr
, "a0");
2123 lp_build_name(dadx_ptr
, "dadx");
2124 lp_build_name(dady_ptr
, "dady");
2125 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
2126 lp_build_name(depth_ptr
, "depth");
2127 lp_build_name(thread_data_ptr
, "thread_data");
2128 lp_build_name(mask_input
, "mask_input");
2129 lp_build_name(stride_ptr
, "stride_ptr");
2135 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
2136 builder
= gallivm
->builder
;
2138 LLVMPositionBuilderAtEnd(builder
, block
);
2140 /* code generated texture sampling */
2141 sampler
= lp_llvm_sampler_soa_create(key
->state
, context_ptr
);
2143 zs_format_desc
= util_format_description(key
->zsbuf_format
);
2147 * The shader input interpolation info is not explicitely baked in the
2148 * shader key, but everything it derives from (TGSI, and flatshade) is
2149 * already included in the shader key.
2151 lp_build_interp_soa_init(&interp
,
2153 shader
->info
.base
.num_inputs
,
2157 a0_ptr
, dadx_ptr
, dady_ptr
,
2160 /* loop over quads in the block */
2161 for(i
= 0; i
< num_fs
; ++i
) {
2162 LLVMValueRef depth_offset
= LLVMConstInt(int32_type
,
2163 i
*fs_type
.length
*zs_format_desc
->block
.bits
/8,
2165 LLVMValueRef out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2166 LLVMValueRef depth_ptr_i
;
2168 depth_ptr_i
= LLVMBuildGEP(builder
, depth_ptr
, &depth_offset
, 1, "");
2170 generate_fs(gallivm
,
2178 &fs_mask
[i
], /* output */
2186 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2187 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
)
2188 fs_out_color
[cbuf
][chan
][i
] =
2189 out_color
[cbuf
* !cbuf0_write_all
][chan
];
2191 if (dual_source_blend
) {
2192 /* only support one dual source blend target hence always use output 1 */
2193 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
)
2194 fs_out_color
[1][chan
][i
] =
2200 unsigned depth_bits
= zs_format_desc
->block
.bits
/8;
2201 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
2202 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
2203 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
2204 num_loop
, "mask_store");
2205 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2208 * The shader input interpolation info is not explicitely baked in the
2209 * shader key, but everything it derives from (TGSI, and flatshade) is
2210 * already included in the shader key.
2212 lp_build_interp_soa_init(&interp
,
2214 shader
->info
.base
.num_inputs
,
2218 a0_ptr
, dadx_ptr
, dady_ptr
,
2221 for (i
= 0; i
< num_fs
; i
++) {
2223 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2224 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2225 &indexi
, 1, "mask_ptr");
2228 mask
= generate_quad_mask(gallivm
, fs_type
,
2229 i
*fs_type
.length
/4, mask_input
);
2232 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
2234 LLVMBuildStore(builder
, mask
, mask_ptr
);
2237 generate_fs_loop(gallivm
,
2245 mask_store
, /* output */
2252 for (i
= 0; i
< num_fs
; i
++) {
2253 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2254 LLVMValueRef ptr
= LLVMBuildGEP(builder
, mask_store
,
2256 fs_mask
[i
] = LLVMBuildLoad(builder
, ptr
, "mask");
2257 /* This is fucked up need to reorganize things */
2258 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2259 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2260 ptr
= LLVMBuildGEP(builder
,
2261 color_store
[cbuf
* !cbuf0_write_all
][chan
],
2263 fs_out_color
[cbuf
][chan
][i
] = ptr
;
2266 if (dual_source_blend
) {
2267 /* only support one dual source blend target hence always use output 1 */
2268 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2269 ptr
= LLVMBuildGEP(builder
,
2270 color_store
[1][chan
],
2272 fs_out_color
[1][chan
][i
] = ptr
;
2278 sampler
->destroy(sampler
);
2280 /* Loop over color outputs / color buffers to do blending.
2282 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2283 LLVMValueRef color_ptr
;
2284 LLVMValueRef stride
;
2285 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
2287 boolean do_branch
= ((key
->depth
.enabled
2288 || key
->stencil
[0].enabled
2289 || key
->alpha
.enabled
)
2290 && !shader
->info
.base
.uses_kill
);
2292 color_ptr
= LLVMBuildLoad(builder
,
2293 LLVMBuildGEP(builder
, color_ptr_ptr
, &index
, 1, ""),
2296 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
2298 stride
= LLVMBuildLoad(builder
,
2299 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
2302 generate_unswizzled_blend(gallivm
, cbuf
, variant
, key
->cbuf_format
[cbuf
],
2303 num_fs
, fs_type
, fs_mask
, fs_out_color
,
2304 context_ptr
, color_ptr
, stride
, partial_mask
, do_branch
);
2307 LLVMBuildRetVoid(builder
);
2309 gallivm_verify_function(gallivm
, function
);
2311 variant
->nr_instrs
+= lp_build_count_instructions(function
);
2316 dump_fs_variant_key(const struct lp_fragment_shader_variant_key
*key
)
2320 debug_printf("fs variant %p:\n", (void *) key
);
2322 if (key
->flatshade
) {
2323 debug_printf("flatshade = 1\n");
2325 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
2326 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
2328 if (key
->depth
.enabled
) {
2329 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
2330 debug_printf("depth.func = %s\n", util_dump_func(key
->depth
.func
, TRUE
));
2331 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
2334 for (i
= 0; i
< 2; ++i
) {
2335 if (key
->stencil
[i
].enabled
) {
2336 debug_printf("stencil[%u].func = %s\n", i
, util_dump_func(key
->stencil
[i
].func
, TRUE
));
2337 debug_printf("stencil[%u].fail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
2338 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
2339 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
2340 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
2341 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
2345 if (key
->alpha
.enabled
) {
2346 debug_printf("alpha.func = %s\n", util_dump_func(key
->alpha
.func
, TRUE
));
2349 if (key
->occlusion_count
) {
2350 debug_printf("occlusion_count = 1\n");
2353 if (key
->blend
.logicop_enable
) {
2354 debug_printf("blend.logicop_func = %s\n", util_dump_logicop(key
->blend
.logicop_func
, TRUE
));
2356 else if (key
->blend
.rt
[0].blend_enable
) {
2357 debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
2358 debug_printf("blend.rgb_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
2359 debug_printf("blend.rgb_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
2360 debug_printf("blend.alpha_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
2361 debug_printf("blend.alpha_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
2362 debug_printf("blend.alpha_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
2364 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
2365 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
2366 const struct lp_static_sampler_state
*sampler
= &key
->state
[i
].sampler_state
;
2367 debug_printf("sampler[%u] = \n", i
);
2368 debug_printf(" .wrap = %s %s %s\n",
2369 util_dump_tex_wrap(sampler
->wrap_s
, TRUE
),
2370 util_dump_tex_wrap(sampler
->wrap_t
, TRUE
),
2371 util_dump_tex_wrap(sampler
->wrap_r
, TRUE
));
2372 debug_printf(" .min_img_filter = %s\n",
2373 util_dump_tex_filter(sampler
->min_img_filter
, TRUE
));
2374 debug_printf(" .min_mip_filter = %s\n",
2375 util_dump_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
2376 debug_printf(" .mag_img_filter = %s\n",
2377 util_dump_tex_filter(sampler
->mag_img_filter
, TRUE
));
2378 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
2379 debug_printf(" .compare_func = %s\n", util_dump_func(sampler
->compare_func
, TRUE
));
2380 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
2381 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
2382 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
2383 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
2384 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
2386 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2387 const struct lp_static_texture_state
*texture
= &key
->state
[i
].texture_state
;
2388 debug_printf("texture[%u] = \n", i
);
2389 debug_printf(" .format = %s\n",
2390 util_format_name(texture
->format
));
2391 debug_printf(" .target = %s\n",
2392 util_dump_tex_target(texture
->target
, TRUE
));
2393 debug_printf(" .level_zero_only = %u\n",
2394 texture
->level_zero_only
);
2395 debug_printf(" .pot = %u %u %u\n",
2397 texture
->pot_height
,
2398 texture
->pot_depth
);
2404 lp_debug_fs_variant(const struct lp_fragment_shader_variant
*variant
)
2406 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
2407 variant
->shader
->no
, variant
->no
);
2408 tgsi_dump(variant
->shader
->base
.tokens
, 0);
2409 dump_fs_variant_key(&variant
->key
);
2410 debug_printf("variant->opaque = %u\n", variant
->opaque
);
2416 * Generate a new fragment shader variant from the shader code and
2417 * other state indicated by the key.
2419 static struct lp_fragment_shader_variant
*
2420 generate_variant(struct llvmpipe_context
*lp
,
2421 struct lp_fragment_shader
*shader
,
2422 const struct lp_fragment_shader_variant_key
*key
)
2424 struct lp_fragment_shader_variant
*variant
;
2425 const struct util_format_description
*cbuf0_format_desc
;
2426 boolean fullcolormask
;
2428 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
2432 variant
->gallivm
= gallivm_create();
2433 if (!variant
->gallivm
) {
2438 variant
->shader
= shader
;
2439 variant
->list_item_global
.base
= variant
;
2440 variant
->list_item_local
.base
= variant
;
2441 variant
->no
= shader
->variants_created
++;
2443 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
2446 * Determine whether we are touching all channels in the color buffer.
2448 fullcolormask
= FALSE
;
2449 if (key
->nr_cbufs
== 1) {
2450 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
2451 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
2455 !key
->blend
.logicop_enable
&&
2456 !key
->blend
.rt
[0].blend_enable
&&
2458 !key
->stencil
[0].enabled
&&
2459 !key
->alpha
.enabled
&&
2460 !key
->depth
.enabled
&&
2461 !shader
->info
.base
.uses_kill
2464 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
2465 lp_debug_fs_variant(variant
);
2468 lp_jit_init_types(variant
);
2470 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
2471 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
2473 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
2474 if (variant
->opaque
) {
2475 /* Specialized shader, which doesn't need to read the color buffer. */
2476 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
2481 * Compile everything
2484 gallivm_compile_module(variant
->gallivm
);
2486 if (variant
->function
[RAST_EDGE_TEST
]) {
2487 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
2488 gallivm_jit_function(variant
->gallivm
,
2489 variant
->function
[RAST_EDGE_TEST
]);
2492 if (variant
->function
[RAST_WHOLE
]) {
2493 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
2494 gallivm_jit_function(variant
->gallivm
,
2495 variant
->function
[RAST_WHOLE
]);
2496 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
2497 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
2505 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
2506 const struct pipe_shader_state
*templ
)
2508 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2509 struct lp_fragment_shader
*shader
;
2511 int nr_sampler_views
;
2514 shader
= CALLOC_STRUCT(lp_fragment_shader
);
2518 shader
->no
= fs_no
++;
2519 make_empty_list(&shader
->variants
);
2521 /* get/save the summary info for this shader */
2522 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
2524 /* we need to keep a local copy of the tokens */
2525 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
2527 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
2528 if (shader
->draw_data
== NULL
) {
2529 FREE((void *) shader
->base
.tokens
);
2534 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2535 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2537 shader
->variant_key_size
= Offset(struct lp_fragment_shader_variant_key
,
2538 state
[MAX2(nr_samplers
, nr_sampler_views
)]);
2540 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2541 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
2542 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
2544 switch (shader
->info
.base
.input_interpolate
[i
]) {
2545 case TGSI_INTERPOLATE_CONSTANT
:
2546 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2548 case TGSI_INTERPOLATE_LINEAR
:
2549 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
2551 case TGSI_INTERPOLATE_PERSPECTIVE
:
2552 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2554 case TGSI_INTERPOLATE_COLOR
:
2555 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
2562 switch (shader
->info
.base
.input_semantic_name
[i
]) {
2563 case TGSI_SEMANTIC_FACE
:
2564 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
2566 case TGSI_SEMANTIC_POSITION
:
2567 /* Position was already emitted above
2569 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
2570 shader
->inputs
[i
].src_index
= 0;
2574 shader
->inputs
[i
].src_index
= i
+1;
2577 if (LP_DEBUG
& DEBUG_TGSI
) {
2579 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
2580 shader
->no
, (void *) shader
);
2581 tgsi_dump(templ
->tokens
, 0);
2582 debug_printf("usage masks:\n");
2583 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
2584 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
2585 debug_printf(" IN[%u].%s%s%s%s\n",
2587 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
2588 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
2589 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
2590 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
2600 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
2602 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2604 if (llvmpipe
->fs
== fs
)
2607 llvmpipe
->fs
= (struct lp_fragment_shader
*) fs
;
2609 draw_bind_fragment_shader(llvmpipe
->draw
,
2610 (llvmpipe
->fs
? llvmpipe
->fs
->draw_data
: NULL
));
2612 llvmpipe
->dirty
|= LP_NEW_FS
;
2617 * Remove shader variant from two lists: the shader's variant list
2618 * and the context's variant list.
2621 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
2622 struct lp_fragment_shader_variant
*variant
)
2626 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
2627 debug_printf("llvmpipe: del fs #%u var #%u v created #%u v cached"
2628 " #%u v total cached #%u\n",
2629 variant
->shader
->no
,
2631 variant
->shader
->variants_created
,
2632 variant
->shader
->variants_cached
,
2633 lp
->nr_fs_variants
);
2636 /* free all the variant's JIT'd functions */
2637 for (i
= 0; i
< Elements(variant
->function
); i
++) {
2638 if (variant
->function
[i
]) {
2639 gallivm_free_function(variant
->gallivm
,
2640 variant
->function
[i
],
2641 variant
->jit_function
[i
]);
2645 gallivm_destroy(variant
->gallivm
);
2647 /* remove from shader's list */
2648 remove_from_list(&variant
->list_item_local
);
2649 variant
->shader
->variants_cached
--;
2651 /* remove from context's list */
2652 remove_from_list(&variant
->list_item_global
);
2653 lp
->nr_fs_variants
--;
2654 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
2661 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
2663 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2664 struct lp_fragment_shader
*shader
= fs
;
2665 struct lp_fs_variant_list_item
*li
;
2667 assert(fs
!= llvmpipe
->fs
);
2670 * XXX: we need to flush the context until we have some sort of reference
2671 * counting in fragment shaders as they may still be binned
2672 * Flushing alone might not sufficient we need to wait on it too.
2674 llvmpipe_finish(pipe
, __FUNCTION__
);
2676 /* Delete all the variants */
2677 li
= first_elem(&shader
->variants
);
2678 while(!at_end(&shader
->variants
, li
)) {
2679 struct lp_fs_variant_list_item
*next
= next_elem(li
);
2680 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
2684 /* Delete draw module's data */
2685 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
2687 assert(shader
->variants_cached
== 0);
2688 FREE((void *) shader
->base
.tokens
);
2695 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
2696 uint shader
, uint index
,
2697 struct pipe_constant_buffer
*cb
)
2699 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2700 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
2702 assert(shader
< PIPE_SHADER_TYPES
);
2703 assert(index
< Elements(llvmpipe
->constants
[shader
]));
2705 /* note: reference counting */
2706 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
2708 if (shader
== PIPE_SHADER_VERTEX
||
2709 shader
== PIPE_SHADER_GEOMETRY
) {
2710 /* Pass the constants to the 'draw' module */
2711 const unsigned size
= cb
? cb
->buffer_size
: 0;
2715 data
= (ubyte
*) llvmpipe_resource_data(constants
);
2717 else if (cb
&& cb
->user_buffer
) {
2718 data
= (ubyte
*) cb
->user_buffer
;
2725 data
+= cb
->buffer_offset
;
2727 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
2731 llvmpipe
->dirty
|= LP_NEW_CONSTANTS
;
2733 if (cb
&& cb
->user_buffer
) {
2734 pipe_resource_reference(&constants
, NULL
);
2740 * Return the blend factor equivalent to a destination alpha of one.
2742 static INLINE
unsigned
2743 force_dst_alpha_one(unsigned factor
)
2746 case PIPE_BLENDFACTOR_DST_ALPHA
:
2747 return PIPE_BLENDFACTOR_ONE
;
2748 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
2749 return PIPE_BLENDFACTOR_ZERO
;
2750 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
2751 return PIPE_BLENDFACTOR_ZERO
;
2759 * We need to generate several variants of the fragment pipeline to match
2760 * all the combinations of the contributing state atoms.
2762 * TODO: there is actually no reason to tie this to context state -- the
2763 * generated code could be cached globally in the screen.
2766 make_variant_key(struct llvmpipe_context
*lp
,
2767 struct lp_fragment_shader
*shader
,
2768 struct lp_fragment_shader_variant_key
*key
)
2772 memset(key
, 0, shader
->variant_key_size
);
2774 if (lp
->framebuffer
.zsbuf
) {
2775 if (lp
->depth_stencil
->depth
.enabled
) {
2776 key
->zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
2777 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
2779 if (lp
->depth_stencil
->stencil
[0].enabled
) {
2780 key
->zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
2781 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
2785 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
2786 if (!lp
->framebuffer
.nr_cbufs
||
2787 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
2788 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
2790 if(key
->alpha
.enabled
)
2791 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
2792 /* alpha.ref_value is passed in jit_context */
2794 key
->flatshade
= lp
->rasterizer
->flatshade
;
2795 if (lp
->active_occlusion_query
) {
2796 key
->occlusion_count
= TRUE
;
2799 if (lp
->framebuffer
.nr_cbufs
) {
2800 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
2803 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
2805 if (!key
->blend
.independent_blend_enable
) {
2806 /* we always need independent blend otherwise the fixups below won't work */
2807 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
2808 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
2810 key
->blend
.independent_blend_enable
= 1;
2813 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
2814 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
2815 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
2816 const struct util_format_description
*format_desc
;
2818 key
->cbuf_format
[i
] = format
;
2820 format_desc
= util_format_description(format
);
2821 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
2822 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
2825 * Mask out color channels not present in the color buffer.
2827 blend_rt
->colormask
&= util_format_colormask(format_desc
);
2830 * Disable blend for integer formats.
2832 if (util_format_is_pure_integer(format
)) {
2833 blend_rt
->blend_enable
= 0;
2837 * Our swizzled render tiles always have an alpha channel, but the linear
2838 * render target format often does not, so force here the dst alpha to be
2841 * This is not a mere optimization. Wrong results will be produced if the
2842 * dst alpha is used, the dst format does not have alpha, and the previous
2843 * rendering was not flushed from the swizzled to linear buffer. For
2844 * example, NonPowTwo DCT.
2846 * TODO: This should be generalized to all channels for better
2847 * performance, but only alpha causes correctness issues.
2849 * Also, force rgb/alpha func/factors match, to make AoS blending easier.
2851 if (format_desc
->swizzle
[3] > UTIL_FORMAT_SWIZZLE_W
||
2852 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
2853 blend_rt
->rgb_src_factor
= force_dst_alpha_one(blend_rt
->rgb_src_factor
);
2854 blend_rt
->rgb_dst_factor
= force_dst_alpha_one(blend_rt
->rgb_dst_factor
);
2855 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
2856 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
2857 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
2861 /* This value will be the same for all the variants of a given shader:
2863 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2865 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
2866 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
2867 lp_sampler_static_sampler_state(&key
->state
[i
].sampler_state
,
2868 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
2873 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
2874 * are dx10-style? Can't really have mixed opcodes, at least not
2875 * if we want to skip the holes here (without rescanning tgsi).
2877 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
2878 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2879 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2880 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1 << i
)) {
2881 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
2882 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
2887 key
->nr_sampler_views
= key
->nr_samplers
;
2888 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2889 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
2890 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
2891 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
2900 * Update fragment shader state. This is called just prior to drawing
2901 * something when some fragment-related state has changed.
2904 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
2906 struct lp_fragment_shader
*shader
= lp
->fs
;
2907 struct lp_fragment_shader_variant_key key
;
2908 struct lp_fragment_shader_variant
*variant
= NULL
;
2909 struct lp_fs_variant_list_item
*li
;
2911 make_variant_key(lp
, shader
, &key
);
2913 /* Search the variants for one which matches the key */
2914 li
= first_elem(&shader
->variants
);
2915 while(!at_end(&shader
->variants
, li
)) {
2916 if(memcmp(&li
->base
->key
, &key
, shader
->variant_key_size
) == 0) {
2924 /* Move this variant to the head of the list to implement LRU
2925 * deletion of shader's when we have too many.
2927 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
2930 /* variant not found, create it now */
2933 unsigned variants_to_cull
;
2936 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
2939 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
2942 /* First, check if we've exceeded the max number of shader variants.
2943 * If so, free 25% of them (the least recently used ones).
2945 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 4 : 0;
2947 if (variants_to_cull
||
2948 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
2949 struct pipe_context
*pipe
= &lp
->pipe
;
2952 * XXX: we need to flush the context until we have some sort of
2953 * reference counting in fragment shaders as they may still be binned
2954 * Flushing alone might not be sufficient we need to wait on it too.
2956 llvmpipe_finish(pipe
, __FUNCTION__
);
2959 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
2960 * number of shader variants (potentially all of them) could be
2961 * pending for destruction on flush.
2964 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
2965 struct lp_fs_variant_list_item
*item
;
2966 if (is_empty_list(&lp
->fs_variants_list
)) {
2969 item
= last_elem(&lp
->fs_variants_list
);
2972 llvmpipe_remove_shader_variant(lp
, item
->base
);
2977 * Generate the new variant.
2980 variant
= generate_variant(lp
, shader
, &key
);
2983 LP_COUNT_ADD(llvm_compile_time
, dt
);
2984 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
2986 llvmpipe_variant_count
++;
2988 /* Put the new variant into the list */
2990 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
2991 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
2992 lp
->nr_fs_variants
++;
2993 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
2994 shader
->variants_cached
++;
2998 /* Bind this variant */
2999 lp_setup_set_fs_variant(lp
->setup
, variant
);
3007 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
3009 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
3010 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
3011 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
3013 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;