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/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_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_bitarit.h"
88 #include "gallivm/lp_bld_pack.h"
89 #include "gallivm/lp_bld_format.h"
90 #include "gallivm/lp_bld_quad.h"
92 #include "lp_bld_alpha.h"
93 #include "lp_bld_blend.h"
94 #include "lp_bld_depth.h"
95 #include "lp_bld_interp.h"
96 #include "lp_context.h"
100 #include "lp_state.h"
101 #include "lp_tex_sample.h"
102 #include "lp_flush.h"
103 #include "lp_state_fs.h"
107 /** Fragment shader number (for debugging) */
108 static unsigned fs_no
= 0;
112 * Expand the relevant bits of mask_input to a n*4-dword mask for the
113 * n*four pixels in n 2x2 quads. This will set the n*four elements of the
114 * quad mask vector to 0 or ~0.
115 * Grouping is 01, 23 for 2 quad mode hence only 0 and 2 are valid
116 * quad arguments with fs length 8.
118 * \param first_quad which quad(s) of the quad group to test, in [0,3]
119 * \param mask_input bitwise mask for the whole 4x4 stamp
122 generate_quad_mask(struct gallivm_state
*gallivm
,
123 struct lp_type fs_type
,
125 LLVMValueRef mask_input
) /* int32 */
127 LLVMBuilderRef builder
= gallivm
->builder
;
128 struct lp_type mask_type
;
129 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
130 LLVMValueRef bits
[16];
131 LLVMValueRef mask
, bits_vec
;
135 * XXX: We'll need a different path for 16 x u8
137 assert(fs_type
.width
== 32);
138 assert(fs_type
.length
<= ARRAY_SIZE(bits
));
139 mask_type
= lp_int_type(fs_type
);
142 * mask_input >>= (quad * 4)
144 switch (first_quad
) {
149 assert(fs_type
.length
== 4);
156 assert(fs_type
.length
== 4);
164 mask_input
= LLVMBuildLShr(builder
,
166 LLVMConstInt(i32t
, shift
, 0),
170 * mask = { mask_input & (1 << i), for i in [0,3] }
172 mask
= lp_build_broadcast(gallivm
,
173 lp_build_vec_type(gallivm
, mask_type
),
176 for (i
= 0; i
< fs_type
.length
/ 4; i
++) {
177 unsigned j
= 2 * (i
% 2) + (i
/ 2) * 8;
178 bits
[4*i
+ 0] = LLVMConstInt(i32t
, 1ULL << (j
+ 0), 0);
179 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1ULL << (j
+ 1), 0);
180 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1ULL << (j
+ 4), 0);
181 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1ULL << (j
+ 5), 0);
183 bits_vec
= LLVMConstVector(bits
, fs_type
.length
);
184 mask
= LLVMBuildAnd(builder
, mask
, bits_vec
, "");
187 * mask = mask == bits ? ~0 : 0
189 mask
= lp_build_compare(gallivm
,
190 mask_type
, PIPE_FUNC_EQUAL
,
197 #define EARLY_DEPTH_TEST 0x1
198 #define LATE_DEPTH_TEST 0x2
199 #define EARLY_DEPTH_WRITE 0x4
200 #define LATE_DEPTH_WRITE 0x8
203 find_output_by_semantic( const struct tgsi_shader_info
*info
,
209 for (i
= 0; i
< info
->num_outputs
; i
++)
210 if (info
->output_semantic_name
[i
] == semantic
&&
211 info
->output_semantic_index
[i
] == index
)
219 * Fetch the specified lp_jit_viewport structure for a given viewport_index.
222 lp_llvm_viewport(LLVMValueRef context_ptr
,
223 struct gallivm_state
*gallivm
,
224 LLVMValueRef viewport_index
)
226 LLVMBuilderRef builder
= gallivm
->builder
;
229 struct lp_type viewport_type
=
230 lp_type_float_vec(32, 32 * LP_JIT_VIEWPORT_NUM_FIELDS
);
232 ptr
= lp_jit_context_viewports(gallivm
, context_ptr
);
233 ptr
= LLVMBuildPointerCast(builder
, ptr
,
234 LLVMPointerType(lp_build_vec_type(gallivm
, viewport_type
), 0), "");
236 res
= lp_build_pointer_get(builder
, ptr
, viewport_index
);
243 lp_build_depth_clamp(struct gallivm_state
*gallivm
,
244 LLVMBuilderRef builder
,
246 LLVMValueRef context_ptr
,
247 LLVMValueRef thread_data_ptr
,
250 LLVMValueRef viewport
, min_depth
, max_depth
;
251 LLVMValueRef viewport_index
;
252 struct lp_build_context f32_bld
;
254 assert(type
.floating
);
255 lp_build_context_init(&f32_bld
, gallivm
, type
);
258 * Assumes clamping of the viewport index will occur in setup/gs. Value
259 * is passed through the rasterization stage via lp_rast_shader_inputs.
261 * See: draw_clamp_viewport_idx and lp_clamp_viewport_idx for clamping
264 viewport_index
= lp_jit_thread_data_raster_state_viewport_index(gallivm
,
268 * Load the min and max depth from the lp_jit_context.viewports
269 * array of lp_jit_viewport structures.
271 viewport
= lp_llvm_viewport(context_ptr
, gallivm
, viewport_index
);
273 /* viewports[viewport_index].min_depth */
274 min_depth
= LLVMBuildExtractElement(builder
, viewport
,
275 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MIN_DEPTH
), "");
276 min_depth
= lp_build_broadcast_scalar(&f32_bld
, min_depth
);
278 /* viewports[viewport_index].max_depth */
279 max_depth
= LLVMBuildExtractElement(builder
, viewport
,
280 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MAX_DEPTH
), "");
281 max_depth
= lp_build_broadcast_scalar(&f32_bld
, max_depth
);
284 * Clamp to the min and max depth values for the given viewport.
286 return lp_build_clamp(&f32_bld
, z
, min_depth
, max_depth
);
291 * Generate the fragment shader, depth/stencil test, and alpha tests.
294 generate_fs_loop(struct gallivm_state
*gallivm
,
295 struct lp_fragment_shader
*shader
,
296 const struct lp_fragment_shader_variant_key
*key
,
297 LLVMBuilderRef builder
,
299 LLVMValueRef context_ptr
,
300 LLVMValueRef num_loop
,
301 struct lp_build_interp_soa_context
*interp
,
302 const struct lp_build_sampler_soa
*sampler
,
303 LLVMValueRef mask_store
,
304 LLVMValueRef (*out_color
)[4],
305 LLVMValueRef depth_ptr
,
306 LLVMValueRef depth_stride
,
308 LLVMValueRef thread_data_ptr
)
310 const struct util_format_description
*zs_format_desc
= NULL
;
311 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
312 struct lp_type int_type
= lp_int_type(type
);
313 LLVMTypeRef vec_type
, int_vec_type
;
314 LLVMValueRef mask_ptr
, mask_val
;
315 LLVMValueRef consts_ptr
, num_consts_ptr
;
317 LLVMValueRef z_value
, s_value
;
318 LLVMValueRef z_fb
, s_fb
;
319 LLVMValueRef stencil_refs
[2];
320 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
321 struct lp_build_for_loop_state loop_state
;
322 struct lp_build_mask_context mask
;
324 * TODO: figure out if simple_shader optimization is really worthwile to
325 * keep. Disabled because it may hide some real bugs in the (depth/stencil)
326 * code since tests tend to take another codepath than real shaders.
328 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
329 shader
->info
.base
.num_inputs
< 3 &&
330 shader
->info
.base
.num_instructions
< 8) && 0;
331 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
332 util_blend_state_is_dual(&key
->blend
, 0);
338 struct lp_bld_tgsi_system_values system_values
;
340 memset(&system_values
, 0, sizeof(system_values
));
342 if (key
->depth
.enabled
||
343 key
->stencil
[0].enabled
) {
345 zs_format_desc
= util_format_description(key
->zsbuf_format
);
346 assert(zs_format_desc
);
348 if (!shader
->info
.base
.writes_z
&& !shader
->info
.base
.writes_stencil
) {
349 if (key
->alpha
.enabled
||
350 key
->blend
.alpha_to_coverage
||
351 shader
->info
.base
.uses_kill
||
352 shader
->info
.base
.writes_samplemask
) {
353 /* With alpha test and kill, can do the depth test early
354 * and hopefully eliminate some quads. But need to do a
355 * special deferred depth write once the final mask value
356 * is known. This only works though if there's either no
357 * stencil test or the stencil value isn't written.
359 if (key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
360 (key
->stencil
[1].enabled
&&
361 key
->stencil
[1].writemask
)))
362 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
364 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
367 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
370 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
373 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
374 !(key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
375 (key
->stencil
[1].enabled
&&
376 key
->stencil
[1].writemask
))))
377 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
383 vec_type
= lp_build_vec_type(gallivm
, type
);
384 int_vec_type
= lp_build_vec_type(gallivm
, int_type
);
386 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
387 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
388 /* convert scalar stencil refs into vectors */
389 stencil_refs
[0] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[0]);
390 stencil_refs
[1] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[1]);
392 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
393 num_consts_ptr
= lp_jit_context_num_constants(gallivm
, context_ptr
);
395 lp_build_for_loop_begin(&loop_state
, gallivm
,
396 lp_build_const_int32(gallivm
, 0),
399 lp_build_const_int32(gallivm
, 1));
401 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
402 &loop_state
.counter
, 1, "mask_ptr");
403 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
405 memset(outputs
, 0, sizeof outputs
);
407 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
408 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
409 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
410 lp_build_vec_type(gallivm
,
415 if (dual_source_blend
) {
416 assert(key
->nr_cbufs
<= 1);
417 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
418 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
419 lp_build_vec_type(gallivm
,
426 /* 'mask' will control execution based on quad's pixel alive/killed state */
427 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
429 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
430 lp_build_mask_check(&mask
);
432 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
);
435 if (depth_mode
& EARLY_DEPTH_TEST
) {
437 * Clamp according to ARB_depth_clamp semantics.
439 if (key
->depth_clamp
) {
440 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
443 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
444 zs_format_desc
, key
->resource_1d
,
445 depth_ptr
, depth_stride
,
446 &z_fb
, &s_fb
, loop_state
.counter
);
447 lp_build_depth_stencil_test(gallivm
,
459 if (depth_mode
& EARLY_DEPTH_WRITE
) {
460 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
461 zs_format_desc
, key
->resource_1d
,
462 NULL
, NULL
, NULL
, loop_state
.counter
,
463 depth_ptr
, depth_stride
,
467 * Note mask check if stencil is enabled must be after ds write not after
468 * stencil test otherwise new stencil values may not get written if all
469 * fragments got killed by depth/stencil test.
471 if (!simple_shader
&& key
->stencil
[0].enabled
)
472 lp_build_mask_check(&mask
);
475 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
);
477 /* Build the actual shader */
478 lp_build_tgsi_soa(gallivm
, tokens
, type
, &mask
,
479 consts_ptr
, num_consts_ptr
, &system_values
,
481 outputs
, context_ptr
, thread_data_ptr
,
482 sampler
, &shader
->info
.base
, NULL
);
485 if (key
->alpha
.enabled
) {
486 int color0
= find_output_by_semantic(&shader
->info
.base
,
490 if (color0
!= -1 && outputs
[color0
][3]) {
491 const struct util_format_description
*cbuf_format_desc
;
492 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
493 LLVMValueRef alpha_ref_value
;
495 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
496 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
498 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
500 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
501 &mask
, alpha
, alpha_ref_value
,
502 (depth_mode
& LATE_DEPTH_TEST
) != 0);
506 /* Emulate Alpha to Coverage with Alpha test */
507 if (key
->blend
.alpha_to_coverage
) {
508 int color0
= find_output_by_semantic(&shader
->info
.base
,
512 if (color0
!= -1 && outputs
[color0
][3]) {
513 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
515 lp_build_alpha_to_coverage(gallivm
, type
,
517 (depth_mode
& LATE_DEPTH_TEST
) != 0);
521 if (shader
->info
.base
.writes_samplemask
) {
522 int smaski
= find_output_by_semantic(&shader
->info
.base
,
523 TGSI_SEMANTIC_SAMPLEMASK
,
526 struct lp_build_context smask_bld
;
527 lp_build_context_init(&smask_bld
, gallivm
, int_type
);
530 smask
= LLVMBuildLoad(builder
, outputs
[smaski
][0], "smask");
532 * Pixel is alive according to the first sample in the mask.
534 smask
= LLVMBuildBitCast(builder
, smask
, smask_bld
.vec_type
, "");
535 smask
= lp_build_and(&smask_bld
, smask
, smask_bld
.one
);
536 smask
= lp_build_cmp(&smask_bld
, PIPE_FUNC_NOTEQUAL
, smask
, smask_bld
.zero
);
537 lp_build_mask_update(&mask
, smask
);
541 if (depth_mode
& LATE_DEPTH_TEST
) {
542 int pos0
= find_output_by_semantic(&shader
->info
.base
,
543 TGSI_SEMANTIC_POSITION
,
545 int s_out
= find_output_by_semantic(&shader
->info
.base
,
546 TGSI_SEMANTIC_STENCIL
,
548 if (pos0
!= -1 && outputs
[pos0
][2]) {
549 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
552 * Clamp according to ARB_depth_clamp semantics.
554 if (key
->depth_clamp
) {
555 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
559 if (s_out
!= -1 && outputs
[s_out
][1]) {
560 /* there's only one value, and spec says to discard additional bits */
561 LLVMValueRef s_max_mask
= lp_build_const_int_vec(gallivm
, int_type
, 255);
562 stencil_refs
[0] = LLVMBuildLoad(builder
, outputs
[s_out
][1], "output.s");
563 stencil_refs
[0] = LLVMBuildBitCast(builder
, stencil_refs
[0], int_vec_type
, "");
564 stencil_refs
[0] = LLVMBuildAnd(builder
, stencil_refs
[0], s_max_mask
, "");
565 stencil_refs
[1] = stencil_refs
[0];
568 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
569 zs_format_desc
, key
->resource_1d
,
570 depth_ptr
, depth_stride
,
571 &z_fb
, &s_fb
, loop_state
.counter
);
573 lp_build_depth_stencil_test(gallivm
,
585 if (depth_mode
& LATE_DEPTH_WRITE
) {
586 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
587 zs_format_desc
, key
->resource_1d
,
588 NULL
, NULL
, NULL
, loop_state
.counter
,
589 depth_ptr
, depth_stride
,
593 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
594 (depth_mode
& LATE_DEPTH_WRITE
))
596 /* Need to apply a reduced mask to the depth write. Reload the
597 * depth value, update from zs_value with the new mask value and
600 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
601 zs_format_desc
, key
->resource_1d
,
602 &mask
, z_fb
, s_fb
, loop_state
.counter
,
603 depth_ptr
, depth_stride
,
609 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
611 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
612 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
613 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
615 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
616 if(outputs
[attrib
][chan
]) {
617 /* XXX: just initialize outputs to point at colors[] and
620 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
621 LLVMValueRef color_ptr
;
622 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
623 &loop_state
.counter
, 1, "");
624 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
625 LLVMBuildStore(builder
, out
, color_ptr
);
631 if (key
->occlusion_count
) {
632 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
633 lp_build_name(counter
, "counter");
634 lp_build_occlusion_count(gallivm
, type
,
635 lp_build_mask_value(&mask
), counter
);
638 mask_val
= lp_build_mask_end(&mask
);
639 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
640 lp_build_for_loop_end(&loop_state
);
645 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
647 * Fragment Shader outputs pixels in small 2x2 blocks
648 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
650 * However in memory pixels are stored in rows
651 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
653 * @param type fragment shader type (4x or 8x float)
654 * @param num_fs number of fs_src
655 * @param is_1d whether we're outputting to a 1d resource
656 * @param dst_channels number of output channels
657 * @param fs_src output from fragment shader
658 * @param dst pointer to store result
659 * @param pad_inline is channel padding inline or at end of row
660 * @return the number of dsts
663 generate_fs_twiddle(struct gallivm_state
*gallivm
,
666 unsigned dst_channels
,
667 LLVMValueRef fs_src
[][4],
671 LLVMValueRef src
[16];
677 unsigned pixels
= type
.length
/ 4;
678 unsigned reorder_group
;
679 unsigned src_channels
;
683 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
684 src_count
= num_fs
* src_channels
;
686 assert(pixels
== 2 || pixels
== 1);
687 assert(num_fs
* src_channels
<= ARRAY_SIZE(src
));
690 * Transpose from SoA -> AoS
692 for (i
= 0; i
< num_fs
; ++i
) {
693 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
697 * Pick transformation options
704 if (dst_channels
== 1) {
710 } else if (dst_channels
== 2) {
714 } else if (dst_channels
> 2) {
721 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
727 * Split the src in half
730 for (i
= num_fs
; i
> 0; --i
) {
731 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
732 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
740 * Ensure pixels are in memory order
743 /* Twiddle pixels by reordering the array, e.g.:
745 * src_count = 8 -> 0 2 1 3 4 6 5 7
746 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
748 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
750 for (i
= 0; i
< src_count
; ++i
) {
751 unsigned group
= i
/ reorder_group
;
752 unsigned block
= (group
/ 4) * 4 * reorder_group
;
753 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
756 } else if (twiddle
) {
757 /* Twiddle pixels across elements of array */
759 * XXX: we should avoid this in some cases, but would need to tell
760 * lp_build_conv to reorder (or deal with it ourselves).
762 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
765 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
769 * Moves any padding between pixels to the end
770 * e.g. RGBXRGBX -> RGBRGBXX
773 unsigned char swizzles
[16];
774 unsigned elems
= pixels
* dst_channels
;
776 for (i
= 0; i
< type
.length
; ++i
) {
778 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
780 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
783 for (i
= 0; i
< src_count
; ++i
) {
784 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
793 * Untwiddle and transpose, much like the above.
794 * However, this is after conversion, so we get packed vectors.
795 * At this time only handle 4x16i8 rgba / 2x16i8 rg / 1x16i8 r data,
796 * the vectors will look like:
797 * r0r1r4r5r2r3r6r7r8r9r12... (albeit color channels may
798 * be swizzled here). Extending to 16bit should be trivial.
799 * Should also be extended to handle twice wide vectors with AVX2...
802 fs_twiddle_transpose(struct gallivm_state
*gallivm
,
809 struct lp_type type64
, type16
, type32
;
810 LLVMTypeRef type64_t
, type8_t
, type16_t
, type32_t
;
811 LLVMBuilderRef builder
= gallivm
->builder
;
812 LLVMValueRef tmp
[4], shuf
[8];
813 for (j
= 0; j
< 2; j
++) {
814 shuf
[j
*4 + 0] = lp_build_const_int32(gallivm
, j
*4 + 0);
815 shuf
[j
*4 + 1] = lp_build_const_int32(gallivm
, j
*4 + 2);
816 shuf
[j
*4 + 2] = lp_build_const_int32(gallivm
, j
*4 + 1);
817 shuf
[j
*4 + 3] = lp_build_const_int32(gallivm
, j
*4 + 3);
820 assert(src_count
== 4 || src_count
== 2 || src_count
== 1);
821 assert(type
.width
== 8);
822 assert(type
.length
== 16);
824 type8_t
= lp_build_vec_type(gallivm
, type
);
829 type64_t
= lp_build_vec_type(gallivm
, type64
);
834 type16_t
= lp_build_vec_type(gallivm
, type16
);
839 type32_t
= lp_build_vec_type(gallivm
, type32
);
841 lp_build_transpose_aos_n(gallivm
, type
, src
, src_count
, tmp
);
843 if (src_count
== 1) {
844 /* transpose was no-op, just untwiddle */
845 LLVMValueRef shuf_vec
;
846 shuf_vec
= LLVMConstVector(shuf
, 8);
847 tmp
[0] = LLVMBuildBitCast(builder
, src
[0], type16_t
, "");
848 tmp
[0] = LLVMBuildShuffleVector(builder
, tmp
[0], tmp
[0], shuf_vec
, "");
849 dst
[0] = LLVMBuildBitCast(builder
, tmp
[0], type8_t
, "");
850 } else if (src_count
== 2) {
851 LLVMValueRef shuf_vec
;
852 shuf_vec
= LLVMConstVector(shuf
, 4);
854 for (i
= 0; i
< 2; i
++) {
855 tmp
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type32_t
, "");
856 tmp
[i
] = LLVMBuildShuffleVector(builder
, tmp
[i
], tmp
[i
], shuf_vec
, "");
857 dst
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type8_t
, "");
860 for (j
= 0; j
< 2; j
++) {
861 LLVMValueRef lo
, hi
, lo2
, hi2
;
863 * Note that if we only really have 3 valid channels (rgb)
864 * and we don't need alpha we could substitute a undef here
865 * for the respective channel (causing llvm to drop conversion
868 /* we now have rgba0rgba1rgba4rgba5 etc, untwiddle */
869 lo2
= LLVMBuildBitCast(builder
, tmp
[j
*2], type64_t
, "");
870 hi2
= LLVMBuildBitCast(builder
, tmp
[j
*2 + 1], type64_t
, "");
871 lo
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 0);
872 hi
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 1);
873 dst
[j
*2] = LLVMBuildBitCast(builder
, lo
, type8_t
, "");
874 dst
[j
*2 + 1] = LLVMBuildBitCast(builder
, hi
, type8_t
, "");
881 * Load an unswizzled block of pixels from memory
884 load_unswizzled_block(struct gallivm_state
*gallivm
,
885 LLVMValueRef base_ptr
,
887 unsigned block_width
,
888 unsigned block_height
,
890 struct lp_type dst_type
,
892 unsigned dst_alignment
)
894 LLVMBuilderRef builder
= gallivm
->builder
;
895 unsigned row_size
= dst_count
/ block_height
;
898 /* Ensure block exactly fits into dst */
899 assert((block_width
* block_height
) % dst_count
== 0);
901 for (i
= 0; i
< dst_count
; ++i
) {
902 unsigned x
= i
% row_size
;
903 unsigned y
= i
/ row_size
;
905 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
906 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
909 LLVMValueRef dst_ptr
;
911 gep
[0] = lp_build_const_int32(gallivm
, 0);
912 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
914 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
915 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
,
916 LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
918 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
920 LLVMSetAlignment(dst
[i
], dst_alignment
);
926 * Store an unswizzled block of pixels to memory
929 store_unswizzled_block(struct gallivm_state
*gallivm
,
930 LLVMValueRef base_ptr
,
932 unsigned block_width
,
933 unsigned block_height
,
935 struct lp_type src_type
,
937 unsigned src_alignment
)
939 LLVMBuilderRef builder
= gallivm
->builder
;
940 unsigned row_size
= src_count
/ block_height
;
943 /* Ensure src exactly fits into block */
944 assert((block_width
* block_height
) % src_count
== 0);
946 for (i
= 0; i
< src_count
; ++i
) {
947 unsigned x
= i
% row_size
;
948 unsigned y
= i
/ row_size
;
950 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
951 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
954 LLVMValueRef src_ptr
;
956 gep
[0] = lp_build_const_int32(gallivm
, 0);
957 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
959 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
960 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
,
961 LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
963 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
965 LLVMSetAlignment(src_ptr
, src_alignment
);
971 * Checks if a format description is an arithmetic format
973 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
975 static inline boolean
976 is_arithmetic_format(const struct util_format_description
*format_desc
)
978 boolean arith
= false;
981 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
982 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
983 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
991 * Checks if this format requires special handling due to required expansion
992 * to floats for blending, and furthermore has "natural" packed AoS -> unpacked
995 static inline boolean
996 format_expands_to_float_soa(const struct util_format_description
*format_desc
)
998 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
||
999 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
1007 * Retrieves the type representing the memory layout for a format
1009 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
1012 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
1013 struct lp_type
* type
)
1018 if (format_expands_to_float_soa(format_desc
)) {
1019 /* just make this a uint with width of block */
1020 type
->floating
= false;
1021 type
->fixed
= false;
1024 type
->width
= format_desc
->block
.bits
;
1029 for (i
= 0; i
< 4; i
++)
1030 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1034 memset(type
, 0, sizeof(struct lp_type
));
1035 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1036 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1037 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1038 type
->norm
= format_desc
->channel
[chan
].normalized
;
1040 if (is_arithmetic_format(format_desc
)) {
1044 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
1045 type
->width
+= format_desc
->channel
[i
].size
;
1048 type
->width
= format_desc
->channel
[chan
].size
;
1049 type
->length
= format_desc
->nr_channels
;
1055 * Retrieves the type for a format which is usable in the blending code.
1057 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
1060 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
1061 struct lp_type
* type
)
1066 if (format_expands_to_float_soa(format_desc
)) {
1067 /* always use ordinary floats for blending */
1068 type
->floating
= true;
1069 type
->fixed
= false;
1077 for (i
= 0; i
< 4; i
++)
1078 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1082 memset(type
, 0, sizeof(struct lp_type
));
1083 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1084 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1085 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1086 type
->norm
= format_desc
->channel
[chan
].normalized
;
1087 type
->width
= format_desc
->channel
[chan
].size
;
1088 type
->length
= format_desc
->nr_channels
;
1090 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
1091 if (format_desc
->channel
[i
].size
> type
->width
)
1092 type
->width
= format_desc
->channel
[i
].size
;
1095 if (type
->floating
) {
1098 if (type
->width
<= 8) {
1100 } else if (type
->width
<= 16) {
1107 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
1114 * Scale a normalized value from src_bits to dst_bits.
1116 * The exact calculation is
1118 * dst = iround(src * dst_mask / src_mask)
1120 * or with integer rounding
1122 * dst = src * (2*dst_mask + sign(src)*src_mask) / (2*src_mask)
1126 * src_mask = (1 << src_bits) - 1
1127 * dst_mask = (1 << dst_bits) - 1
1129 * but we try to avoid division and multiplication through shifts.
1131 static inline LLVMValueRef
1132 scale_bits(struct gallivm_state
*gallivm
,
1136 struct lp_type src_type
)
1138 LLVMBuilderRef builder
= gallivm
->builder
;
1139 LLVMValueRef result
= src
;
1141 if (dst_bits
< src_bits
) {
1142 int delta_bits
= src_bits
- dst_bits
;
1144 if (delta_bits
<= dst_bits
) {
1146 * Approximate the rescaling with a single shift.
1148 * This gives the wrong rounding.
1151 result
= LLVMBuildLShr(builder
,
1153 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1158 * Try more accurate rescaling.
1162 * Drop the least significant bits to make space for the multiplication.
1164 * XXX: A better approach would be to use a wider integer type as intermediate. But
1165 * this is enough to convert alpha from 16bits -> 2 when rendering to
1166 * PIPE_FORMAT_R10G10B10A2_UNORM.
1168 result
= LLVMBuildLShr(builder
,
1170 lp_build_const_int_vec(gallivm
, src_type
, dst_bits
),
1174 result
= LLVMBuildMul(builder
,
1176 lp_build_const_int_vec(gallivm
, src_type
, (1LL << dst_bits
) - 1),
1180 * Add a rounding term before the division.
1182 * TODO: Handle signed integers too.
1184 if (!src_type
.sign
) {
1185 result
= LLVMBuildAdd(builder
,
1187 lp_build_const_int_vec(gallivm
, src_type
, (1LL << (delta_bits
- 1))),
1192 * Approximate the division by src_mask with a src_bits shift.
1194 * Given the src has already been shifted by dst_bits, all we need
1195 * to do is to shift by the difference.
1198 result
= LLVMBuildLShr(builder
,
1200 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1204 } else if (dst_bits
> src_bits
) {
1206 int db
= dst_bits
- src_bits
;
1208 /* Shift left by difference in bits */
1209 result
= LLVMBuildShl(builder
,
1211 lp_build_const_int_vec(gallivm
, src_type
, db
),
1214 if (db
<= src_bits
) {
1215 /* Enough bits in src to fill the remainder */
1216 LLVMValueRef lower
= LLVMBuildLShr(builder
,
1218 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
1221 result
= LLVMBuildOr(builder
, result
, lower
, "");
1222 } else if (db
> src_bits
) {
1223 /* Need to repeatedly copy src bits to fill remainder in dst */
1226 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
1227 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
1229 result
= LLVMBuildOr(builder
,
1231 LLVMBuildLShr(builder
, result
, shuv
, ""),
1241 * If RT is a smallfloat (needing denorms) format
1244 have_smallfloat_format(struct lp_type dst_type
,
1245 enum pipe_format format
)
1247 return ((dst_type
.floating
&& dst_type
.width
!= 32) ||
1248 /* due to format handling hacks this format doesn't have floating set
1249 * here (and actually has width set to 32 too) so special case this. */
1250 (format
== PIPE_FORMAT_R11G11B10_FLOAT
));
1255 * Convert from memory format to blending format
1257 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1260 convert_to_blend_type(struct gallivm_state
*gallivm
,
1261 unsigned block_size
,
1262 const struct util_format_description
*src_fmt
,
1263 struct lp_type src_type
,
1264 struct lp_type dst_type
,
1265 LLVMValueRef
* src
, // and dst
1268 LLVMValueRef
*dst
= src
;
1269 LLVMBuilderRef builder
= gallivm
->builder
;
1270 struct lp_type blend_type
;
1271 struct lp_type mem_type
;
1273 unsigned pixels
= block_size
/ num_srcs
;
1277 * full custom path for packed floats and srgb formats - none of the later
1278 * functions would do anything useful, and given the lp_type representation they
1279 * can't be fixed. Should really have some SoA blend path for these kind of
1280 * formats rather than hacking them in here.
1282 if (format_expands_to_float_soa(src_fmt
)) {
1283 LLVMValueRef tmpsrc
[4];
1285 * This is pretty suboptimal for this case blending in SoA would be much
1286 * better, since conversion gets us SoA values so need to convert back.
1288 assert(src_type
.width
== 32 || src_type
.width
== 16);
1289 assert(dst_type
.floating
);
1290 assert(dst_type
.width
== 32);
1291 assert(dst_type
.length
% 4 == 0);
1292 assert(num_srcs
% 4 == 0);
1294 if (src_type
.width
== 16) {
1295 /* expand 4x16bit values to 4x32bit */
1296 struct lp_type type32x4
= src_type
;
1297 LLVMTypeRef ltype32x4
;
1298 unsigned num_fetch
= dst_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1299 type32x4
.width
= 32;
1300 ltype32x4
= lp_build_vec_type(gallivm
, type32x4
);
1301 for (i
= 0; i
< num_fetch
; i
++) {
1302 src
[i
] = LLVMBuildZExt(builder
, src
[i
], ltype32x4
, "");
1304 src_type
.width
= 32;
1306 for (i
= 0; i
< 4; i
++) {
1309 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1310 LLVMValueRef tmpsoa
[4];
1311 LLVMValueRef tmps
= tmpsrc
[i
];
1312 if (dst_type
.length
== 8) {
1313 LLVMValueRef shuffles
[8];
1315 /* fetch was 4 values but need 8-wide output values */
1316 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1318 * for 8-wide aos transpose would give us wrong order not matching
1319 * incoming converted fs values and mask. ARGH.
1321 for (j
= 0; j
< 4; j
++) {
1322 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1323 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1325 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1326 LLVMConstVector(shuffles
, 8), "");
1328 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1329 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1332 lp_build_unpack_rgba_soa(gallivm
, src_fmt
, dst_type
, tmps
, tmpsoa
);
1334 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1339 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1340 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1342 /* Is the format arithmetic */
1343 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1344 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1346 /* Pad if necessary */
1347 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1348 for (i
= 0; i
< num_srcs
; ++i
) {
1349 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1352 src_type
.length
= dst_type
.length
;
1355 /* Special case for half-floats */
1356 if (mem_type
.width
== 16 && mem_type
.floating
) {
1357 assert(blend_type
.width
== 32 && blend_type
.floating
);
1358 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1366 src_type
.width
= blend_type
.width
* blend_type
.length
;
1367 blend_type
.length
*= pixels
;
1368 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1370 for (i
= 0; i
< num_srcs
; ++i
) {
1371 LLVMValueRef chans
[4];
1372 LLVMValueRef res
= NULL
;
1374 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1376 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1378 unsigned sa
= src_fmt
->channel
[j
].shift
;
1379 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1380 unsigned from_lsb
= j
;
1382 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1385 mask
= (1 << src_fmt
->channel
[j
].size
) - 1;
1387 /* Extract bits from source */
1388 chans
[j
] = LLVMBuildLShr(builder
,
1390 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1393 chans
[j
] = LLVMBuildAnd(builder
,
1395 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1399 if (src_type
.norm
) {
1400 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1401 blend_type
.width
, chans
[j
], src_type
);
1404 /* Insert bits into correct position */
1405 chans
[j
] = LLVMBuildShl(builder
,
1407 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1413 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1417 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1423 * Convert from blending format to memory format
1425 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1428 convert_from_blend_type(struct gallivm_state
*gallivm
,
1429 unsigned block_size
,
1430 const struct util_format_description
*src_fmt
,
1431 struct lp_type src_type
,
1432 struct lp_type dst_type
,
1433 LLVMValueRef
* src
, // and dst
1436 LLVMValueRef
* dst
= src
;
1438 struct lp_type mem_type
;
1439 struct lp_type blend_type
;
1440 LLVMBuilderRef builder
= gallivm
->builder
;
1441 unsigned pixels
= block_size
/ num_srcs
;
1445 * full custom path for packed floats and srgb formats - none of the later
1446 * functions would do anything useful, and given the lp_type representation they
1447 * can't be fixed. Should really have some SoA blend path for these kind of
1448 * formats rather than hacking them in here.
1450 if (format_expands_to_float_soa(src_fmt
)) {
1452 * This is pretty suboptimal for this case blending in SoA would be much
1453 * better - we need to transpose the AoS values back to SoA values for
1454 * conversion/packing.
1456 assert(src_type
.floating
);
1457 assert(src_type
.width
== 32);
1458 assert(src_type
.length
% 4 == 0);
1459 assert(dst_type
.width
== 32 || dst_type
.width
== 16);
1461 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1462 LLVMValueRef tmpsoa
[4], tmpdst
;
1463 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1464 /* really really need SoA here */
1466 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1467 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1470 tmpdst
= lp_build_float_to_srgb_packed(gallivm
, src_fmt
,
1474 if (src_type
.length
== 8) {
1475 LLVMValueRef tmpaos
, shuffles
[8];
1478 * for 8-wide aos transpose has given us wrong order not matching
1479 * output order. HMPF. Also need to split the output values manually.
1481 for (j
= 0; j
< 4; j
++) {
1482 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1483 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1485 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1486 LLVMConstVector(shuffles
, 8), "");
1487 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1488 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1494 if (dst_type
.width
== 16) {
1495 struct lp_type type16x8
= dst_type
;
1496 struct lp_type type32x4
= dst_type
;
1497 LLVMTypeRef ltype16x4
, ltypei64
, ltypei128
;
1498 unsigned num_fetch
= src_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1499 type16x8
.length
= 8;
1500 type32x4
.width
= 32;
1501 ltypei128
= LLVMIntTypeInContext(gallivm
->context
, 128);
1502 ltypei64
= LLVMIntTypeInContext(gallivm
->context
, 64);
1503 ltype16x4
= lp_build_vec_type(gallivm
, dst_type
);
1504 /* We could do vector truncation but it doesn't generate very good code */
1505 for (i
= 0; i
< num_fetch
; i
++) {
1506 src
[i
] = lp_build_pack2(gallivm
, type32x4
, type16x8
,
1507 src
[i
], lp_build_zero(gallivm
, type32x4
));
1508 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltypei128
, "");
1509 src
[i
] = LLVMBuildTrunc(builder
, src
[i
], ltypei64
, "");
1510 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltype16x4
, "");
1516 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1517 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1519 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
1521 /* Special case for half-floats */
1522 if (mem_type
.width
== 16 && mem_type
.floating
) {
1523 int length
= dst_type
.length
;
1524 assert(blend_type
.width
== 32 && blend_type
.floating
);
1526 dst_type
.length
= src_type
.length
;
1528 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1530 dst_type
.length
= length
;
1534 /* Remove any padding */
1535 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
1536 src_type
.length
-= (src_type
.length
% mem_type
.length
);
1538 for (i
= 0; i
< num_srcs
; ++i
) {
1539 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
1543 /* No bit arithmetic to do */
1548 src_type
.length
= pixels
;
1549 src_type
.width
= blend_type
.length
* blend_type
.width
;
1550 dst_type
.length
= pixels
;
1552 for (i
= 0; i
< num_srcs
; ++i
) {
1553 LLVMValueRef chans
[4];
1554 LLVMValueRef res
= NULL
;
1556 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1558 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1560 unsigned sa
= src_fmt
->channel
[j
].shift
;
1561 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1562 unsigned from_lsb
= j
;
1564 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1567 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
1569 for (k
= 0; k
< blend_type
.width
; ++k
) {
1574 chans
[j
] = LLVMBuildLShr(builder
,
1576 lp_build_const_int_vec(gallivm
, src_type
,
1577 from_lsb
* blend_type
.width
),
1580 chans
[j
] = LLVMBuildAnd(builder
,
1582 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1585 /* Scale down bits */
1586 if (src_type
.norm
) {
1587 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
1588 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
1592 chans
[j
] = LLVMBuildShl(builder
,
1594 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1597 sa
+= src_fmt
->channel
[j
].size
;
1602 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1606 assert (dst_type
.width
!= 24);
1608 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
1614 * Convert alpha to same blend type as src
1617 convert_alpha(struct gallivm_state
*gallivm
,
1618 struct lp_type row_type
,
1619 struct lp_type alpha_type
,
1620 const unsigned block_size
,
1621 const unsigned block_height
,
1622 const unsigned src_count
,
1623 const unsigned dst_channels
,
1624 const bool pad_inline
,
1625 LLVMValueRef
* src_alpha
)
1627 LLVMBuilderRef builder
= gallivm
->builder
;
1629 unsigned length
= row_type
.length
;
1630 row_type
.length
= alpha_type
.length
;
1632 /* Twiddle the alpha to match pixels */
1633 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
);
1636 * TODO this should use single lp_build_conv call for
1637 * src_count == 1 && dst_channels == 1 case (dropping the concat below)
1639 for (i
= 0; i
< block_height
; ++i
) {
1640 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
1643 alpha_type
= row_type
;
1644 row_type
.length
= length
;
1646 /* If only one channel we can only need the single alpha value per pixel */
1647 if (src_count
== 1 && dst_channels
== 1) {
1649 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
, src_count
);
1651 /* If there are more srcs than rows then we need to split alpha up */
1652 if (src_count
> block_height
) {
1653 for (i
= src_count
; i
> 0; --i
) {
1654 unsigned pixels
= block_size
/ src_count
;
1655 unsigned idx
= i
- 1;
1657 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4],
1658 (idx
* pixels
) % 4, pixels
);
1662 /* If there is a src for each pixel broadcast the alpha across whole row */
1663 if (src_count
== block_size
) {
1664 for (i
= 0; i
< src_count
; ++i
) {
1665 src_alpha
[i
] = lp_build_broadcast(gallivm
,
1666 lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
1669 unsigned pixels
= block_size
/ src_count
;
1670 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
1671 unsigned alpha_span
= 1;
1672 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
1674 /* Check if we need 2 src_alphas for our shuffles */
1675 if (pixels
> alpha_type
.length
) {
1679 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
1680 for (j
= 0; j
< row_type
.length
; ++j
) {
1681 if (j
< pixels
* channels
) {
1682 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
1684 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
1688 for (i
= 0; i
< src_count
; ++i
) {
1689 unsigned idx1
= i
, idx2
= i
;
1691 if (alpha_span
> 1){
1696 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
1699 LLVMConstVector(shuffles
, row_type
.length
),
1708 * Generates the blend function for unswizzled colour buffers
1709 * Also generates the read & write from colour buffer
1712 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
1714 struct lp_fragment_shader_variant
*variant
,
1715 enum pipe_format out_format
,
1716 unsigned int num_fs
,
1717 struct lp_type fs_type
,
1718 LLVMValueRef
* fs_mask
,
1719 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
1720 LLVMValueRef context_ptr
,
1721 LLVMValueRef color_ptr
,
1722 LLVMValueRef stride
,
1723 unsigned partial_mask
,
1726 const unsigned alpha_channel
= 3;
1727 const unsigned block_width
= LP_RASTER_BLOCK_SIZE
;
1728 const unsigned block_height
= LP_RASTER_BLOCK_SIZE
;
1729 const unsigned block_size
= block_width
* block_height
;
1730 const unsigned lp_integer_vector_width
= 128;
1732 LLVMBuilderRef builder
= gallivm
->builder
;
1733 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
1734 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
1735 LLVMValueRef src_alpha
[4 * 4];
1736 LLVMValueRef src1_alpha
[4 * 4] = { NULL
};
1737 LLVMValueRef src_mask
[4 * 4];
1738 LLVMValueRef src
[4 * 4];
1739 LLVMValueRef src1
[4 * 4];
1740 LLVMValueRef dst
[4 * 4];
1741 LLVMValueRef blend_color
;
1742 LLVMValueRef blend_alpha
;
1743 LLVMValueRef i32_zero
;
1744 LLVMValueRef check_mask
;
1745 LLVMValueRef undef_src_val
;
1747 struct lp_build_mask_context mask_ctx
;
1748 struct lp_type mask_type
;
1749 struct lp_type blend_type
;
1750 struct lp_type row_type
;
1751 struct lp_type dst_type
;
1752 struct lp_type ls_type
;
1754 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
1755 unsigned vector_width
;
1756 unsigned src_channels
= TGSI_NUM_CHANNELS
;
1757 unsigned dst_channels
;
1762 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
1764 unsigned dst_alignment
;
1766 bool pad_inline
= is_arithmetic_format(out_format_desc
);
1767 bool has_alpha
= false;
1768 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
1769 util_blend_state_is_dual(&variant
->key
.blend
, 0);
1771 const boolean is_1d
= variant
->key
.resource_1d
;
1772 boolean twiddle_after_convert
= FALSE
;
1773 unsigned num_fullblock_fs
= is_1d
? 2 * num_fs
: num_fs
;
1774 LLVMValueRef fpstate
= 0;
1776 /* Get type from output format */
1777 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
1778 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
1781 * Technically this code should go into lp_build_smallfloat_to_float
1782 * and lp_build_float_to_smallfloat but due to the
1783 * http://llvm.org/bugs/show_bug.cgi?id=6393
1784 * llvm reorders the mxcsr intrinsics in a way that breaks the code.
1785 * So the ordering is important here and there shouldn't be any
1786 * llvm ir instrunctions in this function before
1787 * this, otherwise half-float format conversions won't work
1788 * (again due to llvm bug #6393).
1790 if (have_smallfloat_format(dst_type
, out_format
)) {
1791 /* We need to make sure that denorms are ok for half float
1793 fpstate
= lp_build_fpstate_get(gallivm
);
1794 lp_build_fpstate_set_denorms_zero(gallivm
, FALSE
);
1797 mask_type
= lp_int32_vec4_type();
1798 mask_type
.length
= fs_type
.length
;
1800 for (i
= num_fs
; i
< num_fullblock_fs
; i
++) {
1801 fs_mask
[i
] = lp_build_zero(gallivm
, mask_type
);
1804 /* Do not bother executing code when mask is empty.. */
1806 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
1808 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1809 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
1812 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
1813 lp_build_mask_check(&mask_ctx
);
1816 partial_mask
|= !variant
->opaque
;
1817 i32_zero
= lp_build_const_int32(gallivm
, 0);
1819 undef_src_val
= lp_build_undef(gallivm
, fs_type
);
1821 row_type
.length
= fs_type
.length
;
1822 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
1824 /* Compute correct swizzle and count channels */
1825 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
1828 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
1829 /* Ensure channel is used */
1830 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
1834 /* Ensure not already written to (happens in case with GL_ALPHA) */
1835 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
1839 /* Ensure we havn't already found all channels */
1840 if (dst_channels
>= out_format_desc
->nr_channels
) {
1844 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
1847 if (i
== alpha_channel
) {
1852 if (format_expands_to_float_soa(out_format_desc
)) {
1854 * the code above can't work for layout_other
1855 * for srgb it would sort of work but we short-circuit swizzles, etc.
1856 * as that is done as part of unpack / pack.
1858 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
1864 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
1867 /* If 3 channels then pad to include alpha for 4 element transpose */
1868 if (dst_channels
== 3) {
1869 assert (!has_alpha
);
1870 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
1871 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
1874 if (out_format_desc
->nr_channels
== 4) {
1877 * We use alpha from the color conversion, not separate one.
1878 * We had to include it for transpose, hence it will get converted
1879 * too (albeit when doing transpose after conversion, that would
1880 * no longer be the case necessarily).
1881 * (It works only with 4 channel dsts, e.g. rgbx formats, because
1882 * otherwise we really have padding, not alpha, included.)
1889 * Load shader output
1891 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1892 /* Always load alpha for use in blending */
1895 alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
1898 alpha
= undef_src_val
;
1901 /* Load each channel */
1902 for (j
= 0; j
< dst_channels
; ++j
) {
1903 assert(swizzle
[j
] < 4);
1905 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
1908 fs_src
[i
][j
] = undef_src_val
;
1912 /* If 3 channels then pad to include alpha for 4 element transpose */
1914 * XXX If we include that here maybe could actually use it instead of
1915 * separate alpha for blending?
1916 * (Difficult though we actually convert pad channels, not alpha.)
1918 if (dst_channels
== 3 && !has_alpha
) {
1919 fs_src
[i
][3] = alpha
;
1922 /* We split the row_mask and row_alpha as we want 128bit interleave */
1923 if (fs_type
.length
== 8) {
1924 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
],
1926 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
],
1927 src_channels
, src_channels
);
1929 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1930 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
1931 src_channels
, src_channels
);
1933 src_mask
[i
] = fs_mask
[i
];
1934 src_alpha
[i
] = alpha
;
1937 if (dual_source_blend
) {
1938 /* same as above except different src/dst, skip masks and comments... */
1939 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1942 alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
1945 alpha
= undef_src_val
;
1948 for (j
= 0; j
< dst_channels
; ++j
) {
1949 assert(swizzle
[j
] < 4);
1951 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
1954 fs_src1
[i
][j
] = undef_src_val
;
1957 if (dst_channels
== 3 && !has_alpha
) {
1958 fs_src1
[i
][3] = alpha
;
1960 if (fs_type
.length
== 8) {
1961 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1962 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
1963 src_channels
, src_channels
);
1965 src1_alpha
[i
] = alpha
;
1970 if (util_format_is_pure_integer(out_format
)) {
1972 * In this case fs_type was really ints or uints disguised as floats,
1975 fs_type
.floating
= 0;
1976 fs_type
.sign
= dst_type
.sign
;
1977 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1978 for (j
= 0; j
< dst_channels
; ++j
) {
1979 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
1980 lp_build_vec_type(gallivm
, fs_type
), "");
1982 if (dst_channels
== 3 && !has_alpha
) {
1983 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
1984 lp_build_vec_type(gallivm
, fs_type
), "");
1990 * We actually should generally do conversion first (for non-1d cases)
1991 * when the blend format is 8 or 16 bits. The reason is obvious,
1992 * there's 2 or 4 times less vectors to deal with for the interleave...
1993 * Albeit for the AVX (not AVX2) case there's no benefit with 16 bit
1994 * vectors (as it can do 32bit unpack with 256bit vectors, but 8/16bit
1995 * unpack only with 128bit vectors).
1996 * Note: for 16bit sizes really need matching pack conversion code
1998 if (!is_1d
&& dst_channels
!= 3 && dst_type
.width
== 8) {
1999 twiddle_after_convert
= TRUE
;
2003 * Pixel twiddle from fragment shader order to memory order
2005 if (!twiddle_after_convert
) {
2006 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
,
2007 dst_channels
, fs_src
, src
, pad_inline
);
2008 if (dual_source_blend
) {
2009 generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
, dst_channels
,
2010 fs_src1
, src1
, pad_inline
);
2013 src_count
= num_fullblock_fs
* dst_channels
;
2015 * We reorder things a bit here, so the cases for 4-wide and 8-wide
2016 * (AVX) turn out the same later when untwiddling/transpose (albeit
2017 * for true AVX2 path untwiddle needs to be different).
2018 * For now just order by colors first (so we can use unpack later).
2020 for (j
= 0; j
< num_fullblock_fs
; j
++) {
2021 for (i
= 0; i
< dst_channels
; i
++) {
2022 src
[i
*num_fullblock_fs
+ j
] = fs_src
[j
][i
];
2023 if (dual_source_blend
) {
2024 src1
[i
*num_fullblock_fs
+ j
] = fs_src1
[j
][i
];
2030 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
2031 if (src_count
!= num_fullblock_fs
* src_channels
) {
2032 unsigned ds
= src_count
/ (num_fullblock_fs
* src_channels
);
2033 row_type
.length
/= ds
;
2034 fs_type
.length
= row_type
.length
;
2037 blend_type
= row_type
;
2038 mask_type
.length
= 4;
2040 /* Convert src to row_type */
2041 if (dual_source_blend
) {
2042 struct lp_type old_row_type
= row_type
;
2043 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2044 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
2047 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2050 /* If the rows are not an SSE vector, combine them to become SSE size! */
2051 if ((row_type
.width
* row_type
.length
) % 128) {
2052 unsigned bits
= row_type
.width
* row_type
.length
;
2055 assert(src_count
>= (vector_width
/ bits
));
2057 dst_count
= src_count
/ (vector_width
/ bits
);
2059 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
2060 if (dual_source_blend
) {
2061 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
2064 row_type
.length
*= combined
;
2065 src_count
/= combined
;
2067 bits
= row_type
.width
* row_type
.length
;
2068 assert(bits
== 128 || bits
== 256);
2071 if (twiddle_after_convert
) {
2072 fs_twiddle_transpose(gallivm
, row_type
, src
, src_count
, src
);
2073 if (dual_source_blend
) {
2074 fs_twiddle_transpose(gallivm
, row_type
, src1
, src_count
, src1
);
2079 * Blend Colour conversion
2081 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
2082 blend_color
= LLVMBuildPointerCast(builder
, blend_color
,
2083 LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
2084 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
,
2085 &i32_zero
, 1, ""), "");
2088 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
2090 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
2092 * since blending is done with floats, there was no conversion.
2093 * However, the rules according to fixed point renderbuffers still
2094 * apply, that is we must clamp inputs to 0.0/1.0.
2095 * (This would apply to separate alpha conversion too but we currently
2096 * force has_alpha to be true.)
2097 * TODO: should skip this with "fake" blend, since post-blend conversion
2098 * will clamp anyway.
2099 * TODO: could also skip this if fragment color clamping is enabled. We
2100 * don't support it natively so it gets baked into the shader however, so
2101 * can't really tell here.
2103 struct lp_build_context f32_bld
;
2104 assert(row_type
.floating
);
2105 lp_build_context_init(&f32_bld
, gallivm
, row_type
);
2106 for (i
= 0; i
< src_count
; i
++) {
2107 src
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src
[i
]);
2109 if (dual_source_blend
) {
2110 for (i
= 0; i
< src_count
; i
++) {
2111 src1
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src1
[i
]);
2114 /* probably can't be different than row_type but better safe than sorry... */
2115 lp_build_context_init(&f32_bld
, gallivm
, blend_type
);
2116 blend_color
= lp_build_clamp(&f32_bld
, blend_color
, f32_bld
.zero
, f32_bld
.one
);
2120 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
2122 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
2123 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
2125 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
2126 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
2128 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
2129 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
2135 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], block_height
, &src_mask
[0]);
2137 if (src_count
< block_height
) {
2138 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
2139 } else if (src_count
> block_height
) {
2140 for (i
= src_count
; i
> 0; --i
) {
2141 unsigned pixels
= block_size
/ src_count
;
2142 unsigned idx
= i
- 1;
2144 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4],
2145 (idx
* pixels
) % 4, pixels
);
2149 assert(mask_type
.width
== 32);
2151 for (i
= 0; i
< src_count
; ++i
) {
2152 unsigned pixels
= block_size
/ src_count
;
2153 unsigned pixel_width
= row_type
.width
* dst_channels
;
2155 if (pixel_width
== 24) {
2156 mask_type
.width
= 8;
2157 mask_type
.length
= vector_width
/ mask_type
.width
;
2159 mask_type
.length
= pixels
;
2160 mask_type
.width
= row_type
.width
* dst_channels
;
2163 * If mask_type width is smaller than 32bit, this doesn't quite
2164 * generate the most efficient code (could use some pack).
2166 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
],
2167 lp_build_int_vec_type(gallivm
, mask_type
), "");
2169 mask_type
.length
*= dst_channels
;
2170 mask_type
.width
/= dst_channels
;
2173 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
],
2174 lp_build_int_vec_type(gallivm
, mask_type
), "");
2175 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
2182 struct lp_type alpha_type
= fs_type
;
2183 alpha_type
.length
= 4;
2184 convert_alpha(gallivm
, row_type
, alpha_type
,
2185 block_size
, block_height
,
2186 src_count
, dst_channels
,
2187 pad_inline
, src_alpha
);
2188 if (dual_source_blend
) {
2189 convert_alpha(gallivm
, row_type
, alpha_type
,
2190 block_size
, block_height
,
2191 src_count
, dst_channels
,
2192 pad_inline
, src1_alpha
);
2198 * Load dst from memory
2200 if (src_count
< block_height
) {
2201 dst_count
= block_height
;
2203 dst_count
= src_count
;
2206 dst_type
.length
*= block_size
/ dst_count
;
2208 if (format_expands_to_float_soa(out_format_desc
)) {
2210 * we need multiple values at once for the conversion, so can as well
2211 * load them vectorized here too instead of concatenating later.
2212 * (Still need concatenation later for 8-wide vectors).
2214 dst_count
= block_height
;
2215 dst_type
.length
= block_width
;
2219 * Compute the alignment of the destination pointer in bytes
2220 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
2221 * are always aligned by MIN2(16, fetch_width) except for buffers (not
2222 * 1d tex but can't distinguish here) so need to stick with per-pixel
2223 * alignment in this case.
2226 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
2229 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
2231 /* Force power-of-two alignment by extracting only the least-significant-bit */
2232 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
2234 * Resource base and stride pointers are aligned to 16 bytes, so that's
2235 * the maximum alignment we can guarantee
2237 dst_alignment
= MIN2(16, dst_alignment
);
2241 if (dst_count
> src_count
) {
2242 if ((dst_type
.width
== 8 || dst_type
.width
== 16) &&
2243 util_is_power_of_two_or_zero(dst_type
.length
) &&
2244 dst_type
.length
* dst_type
.width
< 128) {
2246 * Never try to load values as 4xi8 which we will then
2247 * concatenate to larger vectors. This gives llvm a real
2248 * headache (the problem is the type legalizer (?) will
2249 * try to load that as 4xi8 zext to 4xi32 to fill the vector,
2250 * then the shuffles to concatenate are more or less impossible
2251 * - llvm is easily capable of generating a sequence of 32
2252 * pextrb/pinsrb instructions for that. Albeit it appears to
2253 * be fixed in llvm 4.0. So, load and concatenate with 32bit
2254 * width to avoid the trouble (16bit seems not as bad, llvm
2255 * probably recognizes the load+shuffle as only one shuffle
2256 * is necessary, but we can do just the same anyway).
2258 ls_type
.length
= dst_type
.length
* dst_type
.width
/ 32;
2264 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2265 dst
, ls_type
, dst_count
/ 4, dst_alignment
);
2266 for (i
= dst_count
/ 4; i
< dst_count
; i
++) {
2267 dst
[i
] = lp_build_undef(gallivm
, ls_type
);
2272 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2273 dst
, ls_type
, dst_count
, dst_alignment
);
2278 * Convert from dst/output format to src/blending format.
2280 * This is necessary as we can only read 1 row from memory at a time,
2281 * so the minimum dst_count will ever be at this point is 4.
2283 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
2284 * this will take the 4 dsts and combine them into 1 src so we can perform blending
2285 * on all 16 pixels in that single vector at once.
2287 if (dst_count
> src_count
) {
2288 if (ls_type
.length
!= dst_type
.length
&& ls_type
.length
== 1) {
2289 LLVMTypeRef elem_type
= lp_build_elem_type(gallivm
, ls_type
);
2290 LLVMTypeRef ls_vec_type
= LLVMVectorType(elem_type
, 1);
2291 for (i
= 0; i
< dst_count
; i
++) {
2292 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
], ls_vec_type
, "");
2296 lp_build_concat_n(gallivm
, ls_type
, dst
, 4, dst
, src_count
);
2298 if (ls_type
.length
!= dst_type
.length
) {
2299 struct lp_type tmp_type
= dst_type
;
2300 tmp_type
.length
= dst_type
.length
* 4 / src_count
;
2301 for (i
= 0; i
< src_count
; i
++) {
2302 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
],
2303 lp_build_vec_type(gallivm
, tmp_type
), "");
2311 /* XXX this is broken for RGB8 formats -
2312 * they get expanded from 12 to 16 elements (to include alpha)
2313 * by convert_to_blend_type then reduced to 15 instead of 12
2314 * by convert_from_blend_type (a simple fix though breaks A8...).
2315 * R16G16B16 also crashes differently however something going wrong
2316 * inside llvm handling npot vector sizes seemingly.
2317 * It seems some cleanup could be done here (like skipping conversion/blend
2320 convert_to_blend_type(gallivm
, block_size
, out_format_desc
, dst_type
,
2321 row_type
, dst
, src_count
);
2324 * FIXME: Really should get logic ops / masks out of generic blend / row
2325 * format. Logic ops will definitely not work on the blend float format
2326 * used for SRGB here and I think OpenGL expects this to work as expected
2327 * (that is incoming values converted to srgb then logic op applied).
2329 for (i
= 0; i
< src_count
; ++i
) {
2330 dst
[i
] = lp_build_blend_aos(gallivm
,
2331 &variant
->key
.blend
,
2336 has_alpha
? NULL
: src_alpha
[i
],
2338 has_alpha
? NULL
: src1_alpha
[i
],
2340 partial_mask
? src_mask
[i
] : NULL
,
2342 has_alpha
? NULL
: blend_alpha
,
2344 pad_inline
? 4 : dst_channels
);
2347 convert_from_blend_type(gallivm
, block_size
, out_format_desc
,
2348 row_type
, dst_type
, dst
, src_count
);
2350 /* Split the blend rows back to memory rows */
2351 if (dst_count
> src_count
) {
2352 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
2354 if (src_count
== 1) {
2355 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2356 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2358 row_type
.length
/= 2;
2362 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
2363 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
2364 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2365 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2367 row_type
.length
/= 2;
2372 * Store blend result to memory
2375 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2376 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
2379 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2380 dst
, dst_type
, dst_count
, dst_alignment
);
2383 if (have_smallfloat_format(dst_type
, out_format
)) {
2384 lp_build_fpstate_set(gallivm
, fpstate
);
2388 lp_build_mask_end(&mask_ctx
);
2394 * Generate the runtime callable function for the whole fragment pipeline.
2395 * Note that the function which we generate operates on a block of 16
2396 * pixels at at time. The block contains 2x2 quads. Each quad contains
2400 generate_fragment(struct llvmpipe_context
*lp
,
2401 struct lp_fragment_shader
*shader
,
2402 struct lp_fragment_shader_variant
*variant
,
2403 unsigned partial_mask
)
2405 struct gallivm_state
*gallivm
= variant
->gallivm
;
2406 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
2407 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
2409 struct lp_type fs_type
;
2410 struct lp_type blend_type
;
2411 LLVMTypeRef fs_elem_type
;
2412 LLVMTypeRef blend_vec_type
;
2413 LLVMTypeRef arg_types
[13];
2414 LLVMTypeRef func_type
;
2415 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
2416 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
2417 LLVMValueRef context_ptr
;
2420 LLVMValueRef a0_ptr
;
2421 LLVMValueRef dadx_ptr
;
2422 LLVMValueRef dady_ptr
;
2423 LLVMValueRef color_ptr_ptr
;
2424 LLVMValueRef stride_ptr
;
2425 LLVMValueRef depth_ptr
;
2426 LLVMValueRef depth_stride
;
2427 LLVMValueRef mask_input
;
2428 LLVMValueRef thread_data_ptr
;
2429 LLVMBasicBlockRef block
;
2430 LLVMBuilderRef builder
;
2431 struct lp_build_sampler_soa
*sampler
;
2432 struct lp_build_interp_soa_context interp
;
2433 LLVMValueRef fs_mask
[16 / 4];
2434 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2435 LLVMValueRef function
;
2436 LLVMValueRef facing
;
2441 boolean cbuf0_write_all
;
2442 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2443 util_blend_state_is_dual(&key
->blend
, 0);
2445 assert(lp_native_vector_width
/ 32 >= 4);
2447 /* Adjust color input interpolation according to flatshade state:
2449 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2450 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2451 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2453 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2455 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2459 /* check if writes to cbuf[0] are to be copied to all cbufs */
2461 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
];
2463 /* TODO: actually pick these based on the fs and color buffer
2464 * characteristics. */
2466 memset(&fs_type
, 0, sizeof fs_type
);
2467 fs_type
.floating
= TRUE
; /* floating point values */
2468 fs_type
.sign
= TRUE
; /* values are signed */
2469 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2470 fs_type
.width
= 32; /* 32-bit float */
2471 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2473 memset(&blend_type
, 0, sizeof blend_type
);
2474 blend_type
.floating
= FALSE
; /* values are integers */
2475 blend_type
.sign
= FALSE
; /* values are unsigned */
2476 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2477 blend_type
.width
= 8; /* 8-bit ubyte values */
2478 blend_type
.length
= 16; /* 16 elements per vector */
2481 * Generate the function prototype. Any change here must be reflected in
2482 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2485 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2487 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
2489 util_snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
2490 shader
->no
, variant
->no
, partial_mask
? "partial" : "whole");
2492 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
2493 arg_types
[1] = int32_type
; /* x */
2494 arg_types
[2] = int32_type
; /* y */
2495 arg_types
[3] = int32_type
; /* facing */
2496 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
2497 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
2498 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
2499 arg_types
[7] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
2500 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
2501 arg_types
[9] = int32_type
; /* mask_input */
2502 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
2503 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
2504 arg_types
[12] = int32_type
; /* depth_stride */
2506 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
2507 arg_types
, ARRAY_SIZE(arg_types
), 0);
2509 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
2510 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
2512 variant
->function
[partial_mask
] = function
;
2514 /* XXX: need to propagate noalias down into color param now we are
2515 * passing a pointer-to-pointer?
2517 for(i
= 0; i
< ARRAY_SIZE(arg_types
); ++i
)
2518 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
2519 lp_add_function_attr(function
, i
+ 1, LP_FUNC_ATTR_NOALIAS
);
2521 context_ptr
= LLVMGetParam(function
, 0);
2522 x
= LLVMGetParam(function
, 1);
2523 y
= LLVMGetParam(function
, 2);
2524 facing
= LLVMGetParam(function
, 3);
2525 a0_ptr
= LLVMGetParam(function
, 4);
2526 dadx_ptr
= LLVMGetParam(function
, 5);
2527 dady_ptr
= LLVMGetParam(function
, 6);
2528 color_ptr_ptr
= LLVMGetParam(function
, 7);
2529 depth_ptr
= LLVMGetParam(function
, 8);
2530 mask_input
= LLVMGetParam(function
, 9);
2531 thread_data_ptr
= LLVMGetParam(function
, 10);
2532 stride_ptr
= LLVMGetParam(function
, 11);
2533 depth_stride
= LLVMGetParam(function
, 12);
2535 lp_build_name(context_ptr
, "context");
2536 lp_build_name(x
, "x");
2537 lp_build_name(y
, "y");
2538 lp_build_name(a0_ptr
, "a0");
2539 lp_build_name(dadx_ptr
, "dadx");
2540 lp_build_name(dady_ptr
, "dady");
2541 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
2542 lp_build_name(depth_ptr
, "depth");
2543 lp_build_name(mask_input
, "mask_input");
2544 lp_build_name(thread_data_ptr
, "thread_data");
2545 lp_build_name(stride_ptr
, "stride_ptr");
2546 lp_build_name(depth_stride
, "depth_stride");
2552 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
2553 builder
= gallivm
->builder
;
2555 LLVMPositionBuilderAtEnd(builder
, block
);
2557 /* code generated texture sampling */
2558 sampler
= lp_llvm_sampler_soa_create(key
->state
);
2560 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
2561 /* for 1d resources only run "upper half" of stamp */
2562 if (key
->resource_1d
)
2566 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
2567 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
2568 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
2569 num_loop
, "mask_store");
2570 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2571 boolean pixel_center_integer
=
2572 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
];
2575 * The shader input interpolation info is not explicitely baked in the
2576 * shader key, but everything it derives from (TGSI, and flatshade) is
2577 * already included in the shader key.
2579 lp_build_interp_soa_init(&interp
,
2581 shader
->info
.base
.num_inputs
,
2583 pixel_center_integer
,
2586 a0_ptr
, dadx_ptr
, dady_ptr
,
2589 for (i
= 0; i
< num_fs
; i
++) {
2591 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2592 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2593 &indexi
, 1, "mask_ptr");
2596 mask
= generate_quad_mask(gallivm
, fs_type
,
2597 i
*fs_type
.length
/4, mask_input
);
2600 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
2602 LLVMBuildStore(builder
, mask
, mask_ptr
);
2605 generate_fs_loop(gallivm
,
2613 mask_store
, /* output */
2620 for (i
= 0; i
< num_fs
; i
++) {
2621 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2622 LLVMValueRef ptr
= LLVMBuildGEP(builder
, mask_store
,
2624 fs_mask
[i
] = LLVMBuildLoad(builder
, ptr
, "mask");
2625 /* This is fucked up need to reorganize things */
2626 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2627 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2628 ptr
= LLVMBuildGEP(builder
,
2629 color_store
[cbuf
* !cbuf0_write_all
][chan
],
2631 fs_out_color
[cbuf
][chan
][i
] = ptr
;
2634 if (dual_source_blend
) {
2635 /* only support one dual source blend target hence always use output 1 */
2636 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2637 ptr
= LLVMBuildGEP(builder
,
2638 color_store
[1][chan
],
2640 fs_out_color
[1][chan
][i
] = ptr
;
2646 sampler
->destroy(sampler
);
2648 /* Loop over color outputs / color buffers to do blending.
2650 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2651 if (key
->cbuf_format
[cbuf
] != PIPE_FORMAT_NONE
) {
2652 LLVMValueRef color_ptr
;
2653 LLVMValueRef stride
;
2654 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
2656 boolean do_branch
= ((key
->depth
.enabled
2657 || key
->stencil
[0].enabled
2658 || key
->alpha
.enabled
)
2659 && !shader
->info
.base
.uses_kill
);
2661 color_ptr
= LLVMBuildLoad(builder
,
2662 LLVMBuildGEP(builder
, color_ptr_ptr
,
2666 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
2668 stride
= LLVMBuildLoad(builder
,
2669 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
2672 generate_unswizzled_blend(gallivm
, cbuf
, variant
,
2673 key
->cbuf_format
[cbuf
],
2674 num_fs
, fs_type
, fs_mask
, fs_out_color
,
2675 context_ptr
, color_ptr
, stride
,
2676 partial_mask
, do_branch
);
2680 LLVMBuildRetVoid(builder
);
2682 gallivm_verify_function(gallivm
, function
);
2687 dump_fs_variant_key(const struct lp_fragment_shader_variant_key
*key
)
2691 debug_printf("fs variant %p:\n", (void *) key
);
2693 if (key
->flatshade
) {
2694 debug_printf("flatshade = 1\n");
2696 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
2697 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
2699 if (key
->depth
.enabled
|| key
->stencil
[0].enabled
) {
2700 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
2702 if (key
->depth
.enabled
) {
2703 debug_printf("depth.func = %s\n", util_str_func(key
->depth
.func
, TRUE
));
2704 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
2707 for (i
= 0; i
< 2; ++i
) {
2708 if (key
->stencil
[i
].enabled
) {
2709 debug_printf("stencil[%u].func = %s\n", i
, util_str_func(key
->stencil
[i
].func
, TRUE
));
2710 debug_printf("stencil[%u].fail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
2711 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
2712 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
2713 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
2714 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
2718 if (key
->alpha
.enabled
) {
2719 debug_printf("alpha.func = %s\n", util_str_func(key
->alpha
.func
, TRUE
));
2722 if (key
->occlusion_count
) {
2723 debug_printf("occlusion_count = 1\n");
2726 if (key
->blend
.logicop_enable
) {
2727 debug_printf("blend.logicop_func = %s\n", util_str_logicop(key
->blend
.logicop_func
, TRUE
));
2729 else if (key
->blend
.rt
[0].blend_enable
) {
2730 debug_printf("blend.rgb_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
2731 debug_printf("blend.rgb_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
2732 debug_printf("blend.rgb_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
2733 debug_printf("blend.alpha_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
2734 debug_printf("blend.alpha_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
2735 debug_printf("blend.alpha_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
2737 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
2738 if (key
->blend
.alpha_to_coverage
) {
2739 debug_printf("blend.alpha_to_coverage is enabled\n");
2741 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
2742 const struct lp_static_sampler_state
*sampler
= &key
->state
[i
].sampler_state
;
2743 debug_printf("sampler[%u] = \n", i
);
2744 debug_printf(" .wrap = %s %s %s\n",
2745 util_str_tex_wrap(sampler
->wrap_s
, TRUE
),
2746 util_str_tex_wrap(sampler
->wrap_t
, TRUE
),
2747 util_str_tex_wrap(sampler
->wrap_r
, TRUE
));
2748 debug_printf(" .min_img_filter = %s\n",
2749 util_str_tex_filter(sampler
->min_img_filter
, TRUE
));
2750 debug_printf(" .min_mip_filter = %s\n",
2751 util_str_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
2752 debug_printf(" .mag_img_filter = %s\n",
2753 util_str_tex_filter(sampler
->mag_img_filter
, TRUE
));
2754 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
2755 debug_printf(" .compare_func = %s\n", util_str_func(sampler
->compare_func
, TRUE
));
2756 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
2757 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
2758 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
2759 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
2760 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
2762 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2763 const struct lp_static_texture_state
*texture
= &key
->state
[i
].texture_state
;
2764 debug_printf("texture[%u] = \n", i
);
2765 debug_printf(" .format = %s\n",
2766 util_format_name(texture
->format
));
2767 debug_printf(" .target = %s\n",
2768 util_str_tex_target(texture
->target
, TRUE
));
2769 debug_printf(" .level_zero_only = %u\n",
2770 texture
->level_zero_only
);
2771 debug_printf(" .pot = %u %u %u\n",
2773 texture
->pot_height
,
2774 texture
->pot_depth
);
2780 lp_debug_fs_variant(const struct lp_fragment_shader_variant
*variant
)
2782 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
2783 variant
->shader
->no
, variant
->no
);
2784 tgsi_dump(variant
->shader
->base
.tokens
, 0);
2785 dump_fs_variant_key(&variant
->key
);
2786 debug_printf("variant->opaque = %u\n", variant
->opaque
);
2792 * Generate a new fragment shader variant from the shader code and
2793 * other state indicated by the key.
2795 static struct lp_fragment_shader_variant
*
2796 generate_variant(struct llvmpipe_context
*lp
,
2797 struct lp_fragment_shader
*shader
,
2798 const struct lp_fragment_shader_variant_key
*key
)
2800 struct lp_fragment_shader_variant
*variant
;
2801 const struct util_format_description
*cbuf0_format_desc
= NULL
;
2802 boolean fullcolormask
;
2803 char module_name
[64];
2805 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
2809 util_snprintf(module_name
, sizeof(module_name
), "fs%u_variant%u",
2810 shader
->no
, shader
->variants_created
);
2812 variant
->gallivm
= gallivm_create(module_name
, lp
->context
);
2813 if (!variant
->gallivm
) {
2818 variant
->shader
= shader
;
2819 variant
->list_item_global
.base
= variant
;
2820 variant
->list_item_local
.base
= variant
;
2821 variant
->no
= shader
->variants_created
++;
2823 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
2826 * Determine whether we are touching all channels in the color buffer.
2828 fullcolormask
= FALSE
;
2829 if (key
->nr_cbufs
== 1) {
2830 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
2831 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
2835 !key
->blend
.logicop_enable
&&
2836 !key
->blend
.rt
[0].blend_enable
&&
2838 !key
->stencil
[0].enabled
&&
2839 !key
->alpha
.enabled
&&
2840 !key
->blend
.alpha_to_coverage
&&
2841 !key
->depth
.enabled
&&
2842 !shader
->info
.base
.uses_kill
&&
2843 !shader
->info
.base
.writes_samplemask
2846 /* if num_instructions == 1, it's a nop shader with only an END instruction */
2847 if ((shader
->info
.base
.num_instructions
<= 1) &&
2848 !key
->depth
.enabled
&& !key
->stencil
[0].enabled
) {
2849 variant
->ps_inv_multiplier
= 0;
2851 variant
->ps_inv_multiplier
= 1;
2854 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
2855 lp_debug_fs_variant(variant
);
2858 lp_jit_init_types(variant
);
2860 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
2861 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
2863 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
2864 if (variant
->opaque
) {
2865 /* Specialized shader, which doesn't need to read the color buffer. */
2866 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
2871 * Compile everything
2874 gallivm_compile_module(variant
->gallivm
);
2876 variant
->nr_instrs
+= lp_build_count_ir_module(variant
->gallivm
->module
);
2878 if (variant
->function
[RAST_EDGE_TEST
]) {
2879 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
2880 gallivm_jit_function(variant
->gallivm
,
2881 variant
->function
[RAST_EDGE_TEST
]);
2884 if (variant
->function
[RAST_WHOLE
]) {
2885 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
2886 gallivm_jit_function(variant
->gallivm
,
2887 variant
->function
[RAST_WHOLE
]);
2888 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
2889 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
2892 gallivm_free_ir(variant
->gallivm
);
2899 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
2900 const struct pipe_shader_state
*templ
)
2902 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2903 struct lp_fragment_shader
*shader
;
2905 int nr_sampler_views
;
2908 shader
= CALLOC_STRUCT(lp_fragment_shader
);
2912 shader
->no
= fs_no
++;
2913 make_empty_list(&shader
->variants
);
2915 /* get/save the summary info for this shader */
2916 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
2918 /* we need to keep a local copy of the tokens */
2919 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
2921 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
2922 if (shader
->draw_data
== NULL
) {
2923 FREE((void *) shader
->base
.tokens
);
2928 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2929 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2931 shader
->variant_key_size
= Offset(struct lp_fragment_shader_variant_key
,
2932 state
[MAX2(nr_samplers
, nr_sampler_views
)]);
2934 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2935 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
2936 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
2938 switch (shader
->info
.base
.input_interpolate
[i
]) {
2939 case TGSI_INTERPOLATE_CONSTANT
:
2940 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2942 case TGSI_INTERPOLATE_LINEAR
:
2943 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
2945 case TGSI_INTERPOLATE_PERSPECTIVE
:
2946 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2948 case TGSI_INTERPOLATE_COLOR
:
2949 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
2956 switch (shader
->info
.base
.input_semantic_name
[i
]) {
2957 case TGSI_SEMANTIC_FACE
:
2958 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
2960 case TGSI_SEMANTIC_POSITION
:
2961 /* Position was already emitted above
2963 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
2964 shader
->inputs
[i
].src_index
= 0;
2968 /* XXX this is a completely pointless index map... */
2969 shader
->inputs
[i
].src_index
= i
+1;
2972 if (LP_DEBUG
& DEBUG_TGSI
) {
2974 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
2975 shader
->no
, (void *) shader
);
2976 tgsi_dump(templ
->tokens
, 0);
2977 debug_printf("usage masks:\n");
2978 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
2979 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
2980 debug_printf(" IN[%u].%s%s%s%s\n",
2982 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
2983 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
2984 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
2985 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
2995 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
2997 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2999 if (llvmpipe
->fs
== fs
)
3002 llvmpipe
->fs
= (struct lp_fragment_shader
*) fs
;
3004 draw_bind_fragment_shader(llvmpipe
->draw
,
3005 (llvmpipe
->fs
? llvmpipe
->fs
->draw_data
: NULL
));
3007 llvmpipe
->dirty
|= LP_NEW_FS
;
3012 * Remove shader variant from two lists: the shader's variant list
3013 * and the context's variant list.
3016 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
3017 struct lp_fragment_shader_variant
*variant
)
3019 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
3020 debug_printf("llvmpipe: del fs #%u var %u v created %u v cached %u "
3021 "v total cached %u inst %u total inst %u\n",
3022 variant
->shader
->no
, variant
->no
,
3023 variant
->shader
->variants_created
,
3024 variant
->shader
->variants_cached
,
3025 lp
->nr_fs_variants
, variant
->nr_instrs
, lp
->nr_fs_instrs
);
3028 gallivm_destroy(variant
->gallivm
);
3030 /* remove from shader's list */
3031 remove_from_list(&variant
->list_item_local
);
3032 variant
->shader
->variants_cached
--;
3034 /* remove from context's list */
3035 remove_from_list(&variant
->list_item_global
);
3036 lp
->nr_fs_variants
--;
3037 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
3044 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
3046 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3047 struct lp_fragment_shader
*shader
= fs
;
3048 struct lp_fs_variant_list_item
*li
;
3050 assert(fs
!= llvmpipe
->fs
);
3053 * XXX: we need to flush the context until we have some sort of reference
3054 * counting in fragment shaders as they may still be binned
3055 * Flushing alone might not sufficient we need to wait on it too.
3057 llvmpipe_finish(pipe
, __FUNCTION__
);
3059 /* Delete all the variants */
3060 li
= first_elem(&shader
->variants
);
3061 while(!at_end(&shader
->variants
, li
)) {
3062 struct lp_fs_variant_list_item
*next
= next_elem(li
);
3063 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
3067 /* Delete draw module's data */
3068 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
3070 assert(shader
->variants_cached
== 0);
3071 FREE((void *) shader
->base
.tokens
);
3078 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
3079 enum pipe_shader_type shader
, uint index
,
3080 const struct pipe_constant_buffer
*cb
)
3082 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3083 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
3085 assert(shader
< PIPE_SHADER_TYPES
);
3086 assert(index
< ARRAY_SIZE(llvmpipe
->constants
[shader
]));
3088 /* note: reference counting */
3089 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
3092 if (!(constants
->bind
& PIPE_BIND_CONSTANT_BUFFER
)) {
3093 debug_printf("Illegal set constant without bind flag\n");
3094 constants
->bind
|= PIPE_BIND_CONSTANT_BUFFER
;
3098 if (shader
== PIPE_SHADER_VERTEX
||
3099 shader
== PIPE_SHADER_GEOMETRY
) {
3100 /* Pass the constants to the 'draw' module */
3101 const unsigned size
= cb
? cb
->buffer_size
: 0;
3105 data
= (ubyte
*) llvmpipe_resource_data(constants
);
3107 else if (cb
&& cb
->user_buffer
) {
3108 data
= (ubyte
*) cb
->user_buffer
;
3115 data
+= cb
->buffer_offset
;
3117 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
3121 llvmpipe
->dirty
|= LP_NEW_FS_CONSTANTS
;
3124 if (cb
&& cb
->user_buffer
) {
3125 pipe_resource_reference(&constants
, NULL
);
3131 * Return the blend factor equivalent to a destination alpha of one.
3133 static inline unsigned
3134 force_dst_alpha_one(unsigned factor
, boolean clamped_zero
)
3137 case PIPE_BLENDFACTOR_DST_ALPHA
:
3138 return PIPE_BLENDFACTOR_ONE
;
3139 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
3140 return PIPE_BLENDFACTOR_ZERO
;
3141 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
3143 return PIPE_BLENDFACTOR_ZERO
;
3145 return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
;
3153 * We need to generate several variants of the fragment pipeline to match
3154 * all the combinations of the contributing state atoms.
3156 * TODO: there is actually no reason to tie this to context state -- the
3157 * generated code could be cached globally in the screen.
3160 make_variant_key(struct llvmpipe_context
*lp
,
3161 struct lp_fragment_shader
*shader
,
3162 struct lp_fragment_shader_variant_key
*key
)
3166 memset(key
, 0, shader
->variant_key_size
);
3168 if (lp
->framebuffer
.zsbuf
) {
3169 enum pipe_format zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
3170 const struct util_format_description
*zsbuf_desc
=
3171 util_format_description(zsbuf_format
);
3173 if (lp
->depth_stencil
->depth
.enabled
&&
3174 util_format_has_depth(zsbuf_desc
)) {
3175 key
->zsbuf_format
= zsbuf_format
;
3176 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
3178 if (lp
->depth_stencil
->stencil
[0].enabled
&&
3179 util_format_has_stencil(zsbuf_desc
)) {
3180 key
->zsbuf_format
= zsbuf_format
;
3181 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
3183 if (llvmpipe_resource_is_1d(lp
->framebuffer
.zsbuf
->texture
)) {
3184 key
->resource_1d
= TRUE
;
3189 * Propagate the depth clamp setting from the rasterizer state.
3190 * depth_clip == 0 implies depth clamping is enabled.
3192 * When clip_halfz is enabled, then always clamp the depth values.
3194 * XXX: This is incorrect for GL, but correct for d3d10 (depth
3195 * clamp is always active in d3d10, regardless if depth clip is
3197 * (GL has an always-on [0,1] clamp on fs depth output instead
3198 * to ensure the depth values stay in range. Doesn't look like
3199 * we do that, though...)
3201 if (lp
->rasterizer
->clip_halfz
) {
3202 key
->depth_clamp
= 1;
3204 key
->depth_clamp
= (lp
->rasterizer
->depth_clip
== 0) ? 1 : 0;
3207 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
3208 if (!lp
->framebuffer
.nr_cbufs
||
3209 !lp
->framebuffer
.cbufs
[0] ||
3210 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
3211 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
3213 if(key
->alpha
.enabled
)
3214 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
3215 /* alpha.ref_value is passed in jit_context */
3217 key
->flatshade
= lp
->rasterizer
->flatshade
;
3218 if (lp
->active_occlusion_queries
) {
3219 key
->occlusion_count
= TRUE
;
3222 if (lp
->framebuffer
.nr_cbufs
) {
3223 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
3226 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
3228 if (!key
->blend
.independent_blend_enable
) {
3229 /* we always need independent blend otherwise the fixups below won't work */
3230 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
3231 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
3233 key
->blend
.independent_blend_enable
= 1;
3236 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
3237 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
3239 if (lp
->framebuffer
.cbufs
[i
]) {
3240 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
3241 const struct util_format_description
*format_desc
;
3243 key
->cbuf_format
[i
] = format
;
3246 * Figure out if this is a 1d resource. Note that OpenGL allows crazy
3247 * mixing of 2d textures with height 1 and 1d textures, so make sure
3248 * we pick 1d if any cbuf or zsbuf is 1d.
3250 if (llvmpipe_resource_is_1d(lp
->framebuffer
.cbufs
[i
]->texture
)) {
3251 key
->resource_1d
= TRUE
;
3254 format_desc
= util_format_description(format
);
3255 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
3256 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
3259 * Mask out color channels not present in the color buffer.
3261 blend_rt
->colormask
&= util_format_colormask(format_desc
);
3264 * Disable blend for integer formats.
3266 if (util_format_is_pure_integer(format
)) {
3267 blend_rt
->blend_enable
= 0;
3271 * Our swizzled render tiles always have an alpha channel, but the
3272 * linear render target format often does not, so force here the dst
3275 * This is not a mere optimization. Wrong results will be produced if
3276 * the dst alpha is used, the dst format does not have alpha, and the
3277 * previous rendering was not flushed from the swizzled to linear
3278 * buffer. For example, NonPowTwo DCT.
3280 * TODO: This should be generalized to all channels for better
3281 * performance, but only alpha causes correctness issues.
3283 * Also, force rgb/alpha func/factors match, to make AoS blending
3286 if (format_desc
->swizzle
[3] > PIPE_SWIZZLE_W
||
3287 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
3288 /* Doesn't cover mixed snorm/unorm but can't render to them anyway */
3289 boolean clamped_zero
= !util_format_is_float(format
) &&
3290 !util_format_is_snorm(format
);
3291 blend_rt
->rgb_src_factor
=
3292 force_dst_alpha_one(blend_rt
->rgb_src_factor
, clamped_zero
);
3293 blend_rt
->rgb_dst_factor
=
3294 force_dst_alpha_one(blend_rt
->rgb_dst_factor
, clamped_zero
);
3295 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
3296 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
3297 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
3301 /* no color buffer for this fragment output */
3302 key
->cbuf_format
[i
] = PIPE_FORMAT_NONE
;
3303 blend_rt
->colormask
= 0x0;
3304 blend_rt
->blend_enable
= 0;
3308 /* This value will be the same for all the variants of a given shader:
3310 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
3312 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
3313 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3314 lp_sampler_static_sampler_state(&key
->state
[i
].sampler_state
,
3315 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
3320 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
3321 * are dx10-style? Can't really have mixed opcodes, at least not
3322 * if we want to skip the holes here (without rescanning tgsi).
3324 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
3325 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
3326 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3328 * Note sview may exceed what's representable by file_mask.
3329 * This will still work, the only downside is that not actually
3330 * used views may be included in the shader key.
3332 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1u << (i
& 31))) {
3333 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
3334 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3339 key
->nr_sampler_views
= key
->nr_samplers
;
3340 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3341 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3342 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
3343 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3352 * Update fragment shader state. This is called just prior to drawing
3353 * something when some fragment-related state has changed.
3356 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
3358 struct lp_fragment_shader
*shader
= lp
->fs
;
3359 struct lp_fragment_shader_variant_key key
;
3360 struct lp_fragment_shader_variant
*variant
= NULL
;
3361 struct lp_fs_variant_list_item
*li
;
3363 make_variant_key(lp
, shader
, &key
);
3365 /* Search the variants for one which matches the key */
3366 li
= first_elem(&shader
->variants
);
3367 while(!at_end(&shader
->variants
, li
)) {
3368 if(memcmp(&li
->base
->key
, &key
, shader
->variant_key_size
) == 0) {
3376 /* Move this variant to the head of the list to implement LRU
3377 * deletion of shader's when we have too many.
3379 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3382 /* variant not found, create it now */
3385 unsigned variants_to_cull
;
3387 if (LP_DEBUG
& DEBUG_FS
) {
3388 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
3391 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
3394 /* First, check if we've exceeded the max number of shader variants.
3395 * If so, free 6.25% of them (the least recently used ones).
3397 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 16 : 0;
3399 if (variants_to_cull
||
3400 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
3401 struct pipe_context
*pipe
= &lp
->pipe
;
3403 if (gallivm_debug
& GALLIVM_DEBUG_PERF
) {
3404 debug_printf("Evicting FS: %u fs variants,\t%u total variants,"
3405 "\t%u instrs,\t%u instrs/variant\n",
3406 shader
->variants_cached
,
3407 lp
->nr_fs_variants
, lp
->nr_fs_instrs
,
3408 lp
->nr_fs_instrs
/ lp
->nr_fs_variants
);
3412 * XXX: we need to flush the context until we have some sort of
3413 * reference counting in fragment shaders as they may still be binned
3414 * Flushing alone might not be sufficient we need to wait on it too.
3416 llvmpipe_finish(pipe
, __FUNCTION__
);
3419 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
3420 * number of shader variants (potentially all of them) could be
3421 * pending for destruction on flush.
3424 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
3425 struct lp_fs_variant_list_item
*item
;
3426 if (is_empty_list(&lp
->fs_variants_list
)) {
3429 item
= last_elem(&lp
->fs_variants_list
);
3432 llvmpipe_remove_shader_variant(lp
, item
->base
);
3437 * Generate the new variant.
3440 variant
= generate_variant(lp
, shader
, &key
);
3443 LP_COUNT_ADD(llvm_compile_time
, dt
);
3444 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
3446 /* Put the new variant into the list */
3448 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
3449 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3450 lp
->nr_fs_variants
++;
3451 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
3452 shader
->variants_cached
++;
3456 /* Bind this variant */
3457 lp_setup_set_fs_variant(lp
->setup
, variant
);
3465 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
3467 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
3468 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
3469 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
3471 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;
3475 * Rasterization is disabled if there is no pixel shader and
3476 * both depth and stencil testing are disabled:
3477 * http://msdn.microsoft.com/en-us/library/windows/desktop/bb205125
3480 llvmpipe_rasterization_disabled(struct llvmpipe_context
*lp
)
3482 /* if num_instructions == 1, it's a nop shader with only an END instruction */
3483 boolean null_fs
= !lp
->fs
|| lp
->fs
->info
.base
.num_instructions
<= 1;
3486 !lp
->depth_stencil
->depth
.enabled
&&
3487 !lp
->depth_stencil
->stencil
[0].enabled
);