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 "os/os_time.h"
71 #include "pipe/p_shader_tokens.h"
72 #include "draw/draw_context.h"
73 #include "tgsi/tgsi_dump.h"
74 #include "tgsi/tgsi_scan.h"
75 #include "tgsi/tgsi_parse.h"
76 #include "gallivm/lp_bld_type.h"
77 #include "gallivm/lp_bld_const.h"
78 #include "gallivm/lp_bld_conv.h"
79 #include "gallivm/lp_bld_init.h"
80 #include "gallivm/lp_bld_intr.h"
81 #include "gallivm/lp_bld_logic.h"
82 #include "gallivm/lp_bld_tgsi.h"
83 #include "gallivm/lp_bld_swizzle.h"
84 #include "gallivm/lp_bld_flow.h"
85 #include "gallivm/lp_bld_debug.h"
86 #include "gallivm/lp_bld_arit.h"
87 #include "gallivm/lp_bld_pack.h"
88 #include "gallivm/lp_bld_format.h"
89 #include "gallivm/lp_bld_quad.h"
91 #include "lp_bld_alpha.h"
92 #include "lp_bld_blend.h"
93 #include "lp_bld_depth.h"
94 #include "lp_bld_interp.h"
95 #include "lp_context.h"
100 #include "lp_tex_sample.h"
101 #include "lp_flush.h"
102 #include "lp_state_fs.h"
106 /** Fragment shader number (for debugging) */
107 static unsigned fs_no
= 0;
111 * Expand the relevant bits of mask_input to a n*4-dword mask for the
112 * n*four pixels in n 2x2 quads. This will set the n*four elements of the
113 * quad mask vector to 0 or ~0.
114 * Grouping is 01, 23 for 2 quad mode hence only 0 and 2 are valid
115 * quad arguments with fs length 8.
117 * \param first_quad which quad(s) of the quad group to test, in [0,3]
118 * \param mask_input bitwise mask for the whole 4x4 stamp
121 generate_quad_mask(struct gallivm_state
*gallivm
,
122 struct lp_type fs_type
,
124 LLVMValueRef mask_input
) /* int32 */
126 LLVMBuilderRef builder
= gallivm
->builder
;
127 struct lp_type mask_type
;
128 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
129 LLVMValueRef bits
[16];
130 LLVMValueRef mask
, bits_vec
;
134 * XXX: We'll need a different path for 16 x u8
136 assert(fs_type
.width
== 32);
137 assert(fs_type
.length
<= ARRAY_SIZE(bits
));
138 mask_type
= lp_int_type(fs_type
);
141 * mask_input >>= (quad * 4)
143 switch (first_quad
) {
148 assert(fs_type
.length
== 4);
155 assert(fs_type
.length
== 4);
163 mask_input
= LLVMBuildLShr(builder
,
165 LLVMConstInt(i32t
, shift
, 0),
169 * mask = { mask_input & (1 << i), for i in [0,3] }
171 mask
= lp_build_broadcast(gallivm
,
172 lp_build_vec_type(gallivm
, mask_type
),
175 for (i
= 0; i
< fs_type
.length
/ 4; i
++) {
176 unsigned j
= 2 * (i
% 2) + (i
/ 2) * 8;
177 bits
[4*i
+ 0] = LLVMConstInt(i32t
, 1ULL << (j
+ 0), 0);
178 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1ULL << (j
+ 1), 0);
179 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1ULL << (j
+ 4), 0);
180 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1ULL << (j
+ 5), 0);
182 bits_vec
= LLVMConstVector(bits
, fs_type
.length
);
183 mask
= LLVMBuildAnd(builder
, mask
, bits_vec
, "");
186 * mask = mask == bits ? ~0 : 0
188 mask
= lp_build_compare(gallivm
,
189 mask_type
, PIPE_FUNC_EQUAL
,
196 #define EARLY_DEPTH_TEST 0x1
197 #define LATE_DEPTH_TEST 0x2
198 #define EARLY_DEPTH_WRITE 0x4
199 #define LATE_DEPTH_WRITE 0x8
202 find_output_by_semantic( const struct tgsi_shader_info
*info
,
208 for (i
= 0; i
< info
->num_outputs
; i
++)
209 if (info
->output_semantic_name
[i
] == semantic
&&
210 info
->output_semantic_index
[i
] == index
)
218 * Fetch the specified lp_jit_viewport structure for a given viewport_index.
221 lp_llvm_viewport(LLVMValueRef context_ptr
,
222 struct gallivm_state
*gallivm
,
223 LLVMValueRef viewport_index
)
225 LLVMBuilderRef builder
= gallivm
->builder
;
228 struct lp_type viewport_type
=
229 lp_type_float_vec(32, 32 * LP_JIT_VIEWPORT_NUM_FIELDS
);
231 ptr
= lp_jit_context_viewports(gallivm
, context_ptr
);
232 ptr
= LLVMBuildPointerCast(builder
, ptr
,
233 LLVMPointerType(lp_build_vec_type(gallivm
, viewport_type
), 0), "");
235 res
= lp_build_pointer_get(builder
, ptr
, viewport_index
);
242 lp_build_depth_clamp(struct gallivm_state
*gallivm
,
243 LLVMBuilderRef builder
,
245 LLVMValueRef context_ptr
,
246 LLVMValueRef thread_data_ptr
,
249 LLVMValueRef viewport
, min_depth
, max_depth
;
250 LLVMValueRef viewport_index
;
251 struct lp_build_context f32_bld
;
253 assert(type
.floating
);
254 lp_build_context_init(&f32_bld
, gallivm
, type
);
257 * Assumes clamping of the viewport index will occur in setup/gs. Value
258 * is passed through the rasterization stage via lp_rast_shader_inputs.
260 * See: draw_clamp_viewport_idx and lp_clamp_viewport_idx for clamping
263 viewport_index
= lp_jit_thread_data_raster_state_viewport_index(gallivm
,
267 * Load the min and max depth from the lp_jit_context.viewports
268 * array of lp_jit_viewport structures.
270 viewport
= lp_llvm_viewport(context_ptr
, gallivm
, viewport_index
);
272 /* viewports[viewport_index].min_depth */
273 min_depth
= LLVMBuildExtractElement(builder
, viewport
,
274 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MIN_DEPTH
), "");
275 min_depth
= lp_build_broadcast_scalar(&f32_bld
, min_depth
);
277 /* viewports[viewport_index].max_depth */
278 max_depth
= LLVMBuildExtractElement(builder
, viewport
,
279 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MAX_DEPTH
), "");
280 max_depth
= lp_build_broadcast_scalar(&f32_bld
, max_depth
);
283 * Clamp to the min and max depth values for the given viewport.
285 return lp_build_clamp(&f32_bld
, z
, min_depth
, max_depth
);
290 * Generate the fragment shader, depth/stencil test, and alpha tests.
293 generate_fs_loop(struct gallivm_state
*gallivm
,
294 struct lp_fragment_shader
*shader
,
295 const struct lp_fragment_shader_variant_key
*key
,
296 LLVMBuilderRef builder
,
298 LLVMValueRef context_ptr
,
299 LLVMValueRef num_loop
,
300 struct lp_build_interp_soa_context
*interp
,
301 struct lp_build_sampler_soa
*sampler
,
302 LLVMValueRef mask_store
,
303 LLVMValueRef (*out_color
)[4],
304 LLVMValueRef depth_ptr
,
305 LLVMValueRef depth_stride
,
307 LLVMValueRef thread_data_ptr
)
309 const struct util_format_description
*zs_format_desc
= NULL
;
310 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
311 struct lp_type int_type
= lp_int_type(type
);
312 LLVMTypeRef vec_type
, int_vec_type
;
313 LLVMValueRef mask_ptr
, mask_val
;
314 LLVMValueRef consts_ptr
, num_consts_ptr
;
316 LLVMValueRef z_value
, s_value
;
317 LLVMValueRef z_fb
, s_fb
;
318 LLVMValueRef stencil_refs
[2];
319 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
320 struct lp_build_for_loop_state loop_state
;
321 struct lp_build_mask_context mask
;
323 * TODO: figure out if simple_shader optimization is really worthwile to
324 * keep. Disabled because it may hide some real bugs in the (depth/stencil)
325 * code since tests tend to take another codepath than real shaders.
327 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
328 shader
->info
.base
.num_inputs
< 3 &&
329 shader
->info
.base
.num_instructions
< 8) && 0;
330 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
331 util_blend_state_is_dual(&key
->blend
, 0);
337 struct lp_bld_tgsi_system_values system_values
;
339 memset(&system_values
, 0, sizeof(system_values
));
341 if (key
->depth
.enabled
||
342 key
->stencil
[0].enabled
) {
344 zs_format_desc
= util_format_description(key
->zsbuf_format
);
345 assert(zs_format_desc
);
347 if (!shader
->info
.base
.writes_z
&& !shader
->info
.base
.writes_stencil
) {
348 if (key
->alpha
.enabled
||
349 key
->blend
.alpha_to_coverage
||
350 shader
->info
.base
.uses_kill
) {
351 /* With alpha test and kill, can do the depth test early
352 * and hopefully eliminate some quads. But need to do a
353 * special deferred depth write once the final mask value
354 * is known. This only works though if there's either no
355 * stencil test or the stencil value isn't written.
357 if (key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
358 (key
->stencil
[1].enabled
&&
359 key
->stencil
[1].writemask
)))
360 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
362 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
365 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
368 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
371 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
372 !(key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
373 (key
->stencil
[1].enabled
&&
374 key
->stencil
[1].writemask
))))
375 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
381 vec_type
= lp_build_vec_type(gallivm
, type
);
382 int_vec_type
= lp_build_vec_type(gallivm
, int_type
);
384 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
385 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
386 /* convert scalar stencil refs into vectors */
387 stencil_refs
[0] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[0]);
388 stencil_refs
[1] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[1]);
390 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
391 num_consts_ptr
= lp_jit_context_num_constants(gallivm
, context_ptr
);
393 lp_build_for_loop_begin(&loop_state
, gallivm
,
394 lp_build_const_int32(gallivm
, 0),
397 lp_build_const_int32(gallivm
, 1));
399 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
400 &loop_state
.counter
, 1, "mask_ptr");
401 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
403 memset(outputs
, 0, sizeof outputs
);
405 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
406 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
407 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
408 lp_build_vec_type(gallivm
,
413 if (dual_source_blend
) {
414 assert(key
->nr_cbufs
<= 1);
415 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
416 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
417 lp_build_vec_type(gallivm
,
424 /* 'mask' will control execution based on quad's pixel alive/killed state */
425 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
427 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
428 lp_build_mask_check(&mask
);
430 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
);
433 if (depth_mode
& EARLY_DEPTH_TEST
) {
435 * Clamp according to ARB_depth_clamp semantics.
437 if (key
->depth_clamp
) {
438 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
441 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
442 zs_format_desc
, key
->resource_1d
,
443 depth_ptr
, depth_stride
,
444 &z_fb
, &s_fb
, loop_state
.counter
);
445 lp_build_depth_stencil_test(gallivm
,
457 if (depth_mode
& EARLY_DEPTH_WRITE
) {
458 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
459 zs_format_desc
, key
->resource_1d
,
460 NULL
, NULL
, NULL
, loop_state
.counter
,
461 depth_ptr
, depth_stride
,
465 * Note mask check if stencil is enabled must be after ds write not after
466 * stencil test otherwise new stencil values may not get written if all
467 * fragments got killed by depth/stencil test.
469 if (!simple_shader
&& key
->stencil
[0].enabled
)
470 lp_build_mask_check(&mask
);
473 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
);
475 /* Build the actual shader */
476 lp_build_tgsi_soa(gallivm
, tokens
, type
, &mask
,
477 consts_ptr
, num_consts_ptr
, &system_values
,
479 outputs
, context_ptr
, thread_data_ptr
,
480 sampler
, &shader
->info
.base
, NULL
);
483 if (key
->alpha
.enabled
) {
484 int color0
= find_output_by_semantic(&shader
->info
.base
,
488 if (color0
!= -1 && outputs
[color0
][3]) {
489 const struct util_format_description
*cbuf_format_desc
;
490 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
491 LLVMValueRef alpha_ref_value
;
493 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
494 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
496 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
498 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
499 &mask
, alpha
, alpha_ref_value
,
500 (depth_mode
& LATE_DEPTH_TEST
) != 0);
504 /* Emulate Alpha to Coverage with Alpha test */
505 if (key
->blend
.alpha_to_coverage
) {
506 int color0
= find_output_by_semantic(&shader
->info
.base
,
510 if (color0
!= -1 && outputs
[color0
][3]) {
511 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
513 lp_build_alpha_to_coverage(gallivm
, type
,
515 (depth_mode
& LATE_DEPTH_TEST
) != 0);
520 if (depth_mode
& LATE_DEPTH_TEST
) {
521 int pos0
= find_output_by_semantic(&shader
->info
.base
,
522 TGSI_SEMANTIC_POSITION
,
524 int s_out
= find_output_by_semantic(&shader
->info
.base
,
525 TGSI_SEMANTIC_STENCIL
,
527 if (pos0
!= -1 && outputs
[pos0
][2]) {
528 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
531 * Clamp according to ARB_depth_clamp semantics.
533 if (key
->depth_clamp
) {
534 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
538 if (s_out
!= -1 && outputs
[s_out
][1]) {
539 /* there's only one value, and spec says to discard additional bits */
540 LLVMValueRef s_max_mask
= lp_build_const_int_vec(gallivm
, int_type
, 255);
541 stencil_refs
[0] = LLVMBuildLoad(builder
, outputs
[s_out
][1], "output.s");
542 stencil_refs
[0] = LLVMBuildBitCast(builder
, stencil_refs
[0], int_vec_type
, "");
543 stencil_refs
[0] = LLVMBuildAnd(builder
, stencil_refs
[0], s_max_mask
, "");
544 stencil_refs
[1] = stencil_refs
[0];
547 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
548 zs_format_desc
, key
->resource_1d
,
549 depth_ptr
, depth_stride
,
550 &z_fb
, &s_fb
, loop_state
.counter
);
552 lp_build_depth_stencil_test(gallivm
,
564 if (depth_mode
& LATE_DEPTH_WRITE
) {
565 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
566 zs_format_desc
, key
->resource_1d
,
567 NULL
, NULL
, NULL
, loop_state
.counter
,
568 depth_ptr
, depth_stride
,
572 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
573 (depth_mode
& LATE_DEPTH_WRITE
))
575 /* Need to apply a reduced mask to the depth write. Reload the
576 * depth value, update from zs_value with the new mask value and
579 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
580 zs_format_desc
, key
->resource_1d
,
581 &mask
, z_fb
, s_fb
, loop_state
.counter
,
582 depth_ptr
, depth_stride
,
588 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
590 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
591 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
592 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
594 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
595 if(outputs
[attrib
][chan
]) {
596 /* XXX: just initialize outputs to point at colors[] and
599 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
600 LLVMValueRef color_ptr
;
601 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
602 &loop_state
.counter
, 1, "");
603 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
604 LLVMBuildStore(builder
, out
, color_ptr
);
610 if (key
->occlusion_count
) {
611 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
612 lp_build_name(counter
, "counter");
613 lp_build_occlusion_count(gallivm
, type
,
614 lp_build_mask_value(&mask
), counter
);
617 mask_val
= lp_build_mask_end(&mask
);
618 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
619 lp_build_for_loop_end(&loop_state
);
624 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
626 * Fragment Shader outputs pixels in small 2x2 blocks
627 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
629 * However in memory pixels are stored in rows
630 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
632 * @param type fragment shader type (4x or 8x float)
633 * @param num_fs number of fs_src
634 * @param is_1d whether we're outputting to a 1d resource
635 * @param dst_channels number of output channels
636 * @param fs_src output from fragment shader
637 * @param dst pointer to store result
638 * @param pad_inline is channel padding inline or at end of row
639 * @return the number of dsts
642 generate_fs_twiddle(struct gallivm_state
*gallivm
,
645 unsigned dst_channels
,
646 LLVMValueRef fs_src
[][4],
650 LLVMValueRef src
[16];
656 unsigned pixels
= type
.length
/ 4;
657 unsigned reorder_group
;
658 unsigned src_channels
;
662 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
663 src_count
= num_fs
* src_channels
;
665 assert(pixels
== 2 || pixels
== 1);
666 assert(num_fs
* src_channels
<= ARRAY_SIZE(src
));
669 * Transpose from SoA -> AoS
671 for (i
= 0; i
< num_fs
; ++i
) {
672 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
676 * Pick transformation options
683 if (dst_channels
== 1) {
689 } else if (dst_channels
== 2) {
693 } else if (dst_channels
> 2) {
700 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
706 * Split the src in half
709 for (i
= num_fs
; i
> 0; --i
) {
710 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
711 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
719 * Ensure pixels are in memory order
722 /* Twiddle pixels by reordering the array, e.g.:
724 * src_count = 8 -> 0 2 1 3 4 6 5 7
725 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
727 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
729 for (i
= 0; i
< src_count
; ++i
) {
730 unsigned group
= i
/ reorder_group
;
731 unsigned block
= (group
/ 4) * 4 * reorder_group
;
732 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
735 } else if (twiddle
) {
736 /* Twiddle pixels across elements of array */
738 * XXX: we should avoid this in some cases, but would need to tell
739 * lp_build_conv to reorder (or deal with it ourselves).
741 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
744 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
748 * Moves any padding between pixels to the end
749 * e.g. RGBXRGBX -> RGBRGBXX
752 unsigned char swizzles
[16];
753 unsigned elems
= pixels
* dst_channels
;
755 for (i
= 0; i
< type
.length
; ++i
) {
757 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
759 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
762 for (i
= 0; i
< src_count
; ++i
) {
763 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
772 * Untwiddle and transpose, much like the above.
773 * However, this is after conversion, so we get packed vectors.
774 * At this time only handle 4x16i8 rgba / 2x16i8 rg / 1x16i8 r data,
775 * the vectors will look like:
776 * r0r1r4r5r2r3r6r7r8r9r12... (albeit color channels may
777 * be swizzled here). Extending to 16bit should be trivial.
778 * Should also be extended to handle twice wide vectors with AVX2...
781 fs_twiddle_transpose(struct gallivm_state
*gallivm
,
788 struct lp_type type64
, type16
, type32
;
789 LLVMTypeRef type64_t
, type8_t
, type16_t
, type32_t
;
790 LLVMBuilderRef builder
= gallivm
->builder
;
791 LLVMValueRef tmp
[4], shuf
[8];
792 for (j
= 0; j
< 2; j
++) {
793 shuf
[j
*4 + 0] = lp_build_const_int32(gallivm
, j
*4 + 0);
794 shuf
[j
*4 + 1] = lp_build_const_int32(gallivm
, j
*4 + 2);
795 shuf
[j
*4 + 2] = lp_build_const_int32(gallivm
, j
*4 + 1);
796 shuf
[j
*4 + 3] = lp_build_const_int32(gallivm
, j
*4 + 3);
799 assert(src_count
== 4 || src_count
== 2 || src_count
== 1);
800 assert(type
.width
== 8);
801 assert(type
.length
== 16);
803 type8_t
= lp_build_vec_type(gallivm
, type
);
808 type64_t
= lp_build_vec_type(gallivm
, type64
);
813 type16_t
= lp_build_vec_type(gallivm
, type16
);
818 type32_t
= lp_build_vec_type(gallivm
, type32
);
820 lp_build_transpose_aos_n(gallivm
, type
, src
, src_count
, tmp
);
822 if (src_count
== 1) {
823 /* transpose was no-op, just untwiddle */
824 LLVMValueRef shuf_vec
;
825 shuf_vec
= LLVMConstVector(shuf
, 8);
826 tmp
[0] = LLVMBuildBitCast(builder
, src
[0], type16_t
, "");
827 tmp
[0] = LLVMBuildShuffleVector(builder
, tmp
[0], tmp
[0], shuf_vec
, "");
828 dst
[0] = LLVMBuildBitCast(builder
, tmp
[0], type8_t
, "");
829 } else if (src_count
== 2) {
830 LLVMValueRef shuf_vec
;
831 shuf_vec
= LLVMConstVector(shuf
, 4);
833 for (i
= 0; i
< 2; i
++) {
834 tmp
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type32_t
, "");
835 tmp
[i
] = LLVMBuildShuffleVector(builder
, tmp
[i
], tmp
[i
], shuf_vec
, "");
836 dst
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type8_t
, "");
839 for (j
= 0; j
< 2; j
++) {
840 LLVMValueRef lo
, hi
, lo2
, hi2
;
842 * Note that if we only really have 3 valid channels (rgb)
843 * and we don't need alpha we could substitute a undef here
844 * for the respective channel (causing llvm to drop conversion
847 /* we now have rgba0rgba1rgba4rgba5 etc, untwiddle */
848 lo2
= LLVMBuildBitCast(builder
, tmp
[j
*2], type64_t
, "");
849 hi2
= LLVMBuildBitCast(builder
, tmp
[j
*2 + 1], type64_t
, "");
850 lo
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 0);
851 hi
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 1);
852 dst
[j
*2] = LLVMBuildBitCast(builder
, lo
, type8_t
, "");
853 dst
[j
*2 + 1] = LLVMBuildBitCast(builder
, hi
, type8_t
, "");
860 * Load an unswizzled block of pixels from memory
863 load_unswizzled_block(struct gallivm_state
*gallivm
,
864 LLVMValueRef base_ptr
,
866 unsigned block_width
,
867 unsigned block_height
,
869 struct lp_type dst_type
,
871 unsigned dst_alignment
)
873 LLVMBuilderRef builder
= gallivm
->builder
;
874 unsigned row_size
= dst_count
/ block_height
;
877 /* Ensure block exactly fits into dst */
878 assert((block_width
* block_height
) % dst_count
== 0);
880 for (i
= 0; i
< dst_count
; ++i
) {
881 unsigned x
= i
% row_size
;
882 unsigned y
= i
/ row_size
;
884 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
885 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
888 LLVMValueRef dst_ptr
;
890 gep
[0] = lp_build_const_int32(gallivm
, 0);
891 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
893 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
894 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
,
895 LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
897 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
899 LLVMSetAlignment(dst
[i
], dst_alignment
);
905 * Store an unswizzled block of pixels to memory
908 store_unswizzled_block(struct gallivm_state
*gallivm
,
909 LLVMValueRef base_ptr
,
911 unsigned block_width
,
912 unsigned block_height
,
914 struct lp_type src_type
,
916 unsigned src_alignment
)
918 LLVMBuilderRef builder
= gallivm
->builder
;
919 unsigned row_size
= src_count
/ block_height
;
922 /* Ensure src exactly fits into block */
923 assert((block_width
* block_height
) % src_count
== 0);
925 for (i
= 0; i
< src_count
; ++i
) {
926 unsigned x
= i
% row_size
;
927 unsigned y
= i
/ row_size
;
929 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
930 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
933 LLVMValueRef src_ptr
;
935 gep
[0] = lp_build_const_int32(gallivm
, 0);
936 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
938 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
939 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
,
940 LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
942 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
944 LLVMSetAlignment(src_ptr
, src_alignment
);
950 * Checks if a format description is an arithmetic format
952 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
954 static inline boolean
955 is_arithmetic_format(const struct util_format_description
*format_desc
)
957 boolean arith
= false;
960 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
961 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
962 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
970 * Checks if this format requires special handling due to required expansion
971 * to floats for blending, and furthermore has "natural" packed AoS -> unpacked
974 static inline boolean
975 format_expands_to_float_soa(const struct util_format_description
*format_desc
)
977 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
||
978 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
986 * Retrieves the type representing the memory layout for a format
988 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
991 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
992 struct lp_type
* type
)
997 if (format_expands_to_float_soa(format_desc
)) {
998 /* just make this a uint with width of block */
999 type
->floating
= false;
1000 type
->fixed
= false;
1003 type
->width
= format_desc
->block
.bits
;
1008 for (i
= 0; i
< 4; i
++)
1009 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1013 memset(type
, 0, sizeof(struct lp_type
));
1014 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1015 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1016 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1017 type
->norm
= format_desc
->channel
[chan
].normalized
;
1019 if (is_arithmetic_format(format_desc
)) {
1023 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
1024 type
->width
+= format_desc
->channel
[i
].size
;
1027 type
->width
= format_desc
->channel
[chan
].size
;
1028 type
->length
= format_desc
->nr_channels
;
1034 * Retrieves the type for a format which is usable in the blending code.
1036 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
1039 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
1040 struct lp_type
* type
)
1045 if (format_expands_to_float_soa(format_desc
)) {
1046 /* always use ordinary floats for blending */
1047 type
->floating
= true;
1048 type
->fixed
= false;
1056 for (i
= 0; i
< 4; i
++)
1057 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1061 memset(type
, 0, sizeof(struct lp_type
));
1062 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1063 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1064 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1065 type
->norm
= format_desc
->channel
[chan
].normalized
;
1066 type
->width
= format_desc
->channel
[chan
].size
;
1067 type
->length
= format_desc
->nr_channels
;
1069 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
1070 if (format_desc
->channel
[i
].size
> type
->width
)
1071 type
->width
= format_desc
->channel
[i
].size
;
1074 if (type
->floating
) {
1077 if (type
->width
<= 8) {
1079 } else if (type
->width
<= 16) {
1086 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
1093 * Scale a normalized value from src_bits to dst_bits.
1095 * The exact calculation is
1097 * dst = iround(src * dst_mask / src_mask)
1099 * or with integer rounding
1101 * dst = src * (2*dst_mask + sign(src)*src_mask) / (2*src_mask)
1105 * src_mask = (1 << src_bits) - 1
1106 * dst_mask = (1 << dst_bits) - 1
1108 * but we try to avoid division and multiplication through shifts.
1110 static inline LLVMValueRef
1111 scale_bits(struct gallivm_state
*gallivm
,
1115 struct lp_type src_type
)
1117 LLVMBuilderRef builder
= gallivm
->builder
;
1118 LLVMValueRef result
= src
;
1120 if (dst_bits
< src_bits
) {
1121 int delta_bits
= src_bits
- dst_bits
;
1123 if (delta_bits
<= dst_bits
) {
1125 * Approximate the rescaling with a single shift.
1127 * This gives the wrong rounding.
1130 result
= LLVMBuildLShr(builder
,
1132 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1137 * Try more accurate rescaling.
1141 * Drop the least significant bits to make space for the multiplication.
1143 * XXX: A better approach would be to use a wider integer type as intermediate. But
1144 * this is enough to convert alpha from 16bits -> 2 when rendering to
1145 * PIPE_FORMAT_R10G10B10A2_UNORM.
1147 result
= LLVMBuildLShr(builder
,
1149 lp_build_const_int_vec(gallivm
, src_type
, dst_bits
),
1153 result
= LLVMBuildMul(builder
,
1155 lp_build_const_int_vec(gallivm
, src_type
, (1LL << dst_bits
) - 1),
1159 * Add a rounding term before the division.
1161 * TODO: Handle signed integers too.
1163 if (!src_type
.sign
) {
1164 result
= LLVMBuildAdd(builder
,
1166 lp_build_const_int_vec(gallivm
, src_type
, (1LL << (delta_bits
- 1))),
1171 * Approximate the division by src_mask with a src_bits shift.
1173 * Given the src has already been shifted by dst_bits, all we need
1174 * to do is to shift by the difference.
1177 result
= LLVMBuildLShr(builder
,
1179 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1183 } else if (dst_bits
> src_bits
) {
1185 int db
= dst_bits
- src_bits
;
1187 /* Shift left by difference in bits */
1188 result
= LLVMBuildShl(builder
,
1190 lp_build_const_int_vec(gallivm
, src_type
, db
),
1193 if (db
<= src_bits
) {
1194 /* Enough bits in src to fill the remainder */
1195 LLVMValueRef lower
= LLVMBuildLShr(builder
,
1197 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
1200 result
= LLVMBuildOr(builder
, result
, lower
, "");
1201 } else if (db
> src_bits
) {
1202 /* Need to repeatedly copy src bits to fill remainder in dst */
1205 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
1206 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
1208 result
= LLVMBuildOr(builder
,
1210 LLVMBuildLShr(builder
, result
, shuv
, ""),
1220 * If RT is a smallfloat (needing denorms) format
1223 have_smallfloat_format(struct lp_type dst_type
,
1224 enum pipe_format format
)
1226 return ((dst_type
.floating
&& dst_type
.width
!= 32) ||
1227 /* due to format handling hacks this format doesn't have floating set
1228 * here (and actually has width set to 32 too) so special case this. */
1229 (format
== PIPE_FORMAT_R11G11B10_FLOAT
));
1234 * Convert from memory format to blending format
1236 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1239 convert_to_blend_type(struct gallivm_state
*gallivm
,
1240 unsigned block_size
,
1241 const struct util_format_description
*src_fmt
,
1242 struct lp_type src_type
,
1243 struct lp_type dst_type
,
1244 LLVMValueRef
* src
, // and dst
1247 LLVMValueRef
*dst
= src
;
1248 LLVMBuilderRef builder
= gallivm
->builder
;
1249 struct lp_type blend_type
;
1250 struct lp_type mem_type
;
1252 unsigned pixels
= block_size
/ num_srcs
;
1256 * full custom path for packed floats and srgb formats - none of the later
1257 * functions would do anything useful, and given the lp_type representation they
1258 * can't be fixed. Should really have some SoA blend path for these kind of
1259 * formats rather than hacking them in here.
1261 if (format_expands_to_float_soa(src_fmt
)) {
1262 LLVMValueRef tmpsrc
[4];
1264 * This is pretty suboptimal for this case blending in SoA would be much
1265 * better, since conversion gets us SoA values so need to convert back.
1267 assert(src_type
.width
== 32 || src_type
.width
== 16);
1268 assert(dst_type
.floating
);
1269 assert(dst_type
.width
== 32);
1270 assert(dst_type
.length
% 4 == 0);
1271 assert(num_srcs
% 4 == 0);
1273 if (src_type
.width
== 16) {
1274 /* expand 4x16bit values to 4x32bit */
1275 struct lp_type type32x4
= src_type
;
1276 LLVMTypeRef ltype32x4
;
1277 unsigned num_fetch
= dst_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1278 type32x4
.width
= 32;
1279 ltype32x4
= lp_build_vec_type(gallivm
, type32x4
);
1280 for (i
= 0; i
< num_fetch
; i
++) {
1281 src
[i
] = LLVMBuildZExt(builder
, src
[i
], ltype32x4
, "");
1283 src_type
.width
= 32;
1285 for (i
= 0; i
< 4; i
++) {
1288 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1289 LLVMValueRef tmpsoa
[4];
1290 LLVMValueRef tmps
= tmpsrc
[i
];
1291 if (dst_type
.length
== 8) {
1292 LLVMValueRef shuffles
[8];
1294 /* fetch was 4 values but need 8-wide output values */
1295 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1297 * for 8-wide aos transpose would give us wrong order not matching
1298 * incoming converted fs values and mask. ARGH.
1300 for (j
= 0; j
< 4; j
++) {
1301 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1302 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1304 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1305 LLVMConstVector(shuffles
, 8), "");
1307 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1308 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1311 lp_build_unpack_rgba_soa(gallivm
, src_fmt
, dst_type
, tmps
, tmpsoa
);
1313 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1318 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1319 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1321 /* Is the format arithmetic */
1322 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1323 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1325 /* Pad if necessary */
1326 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1327 for (i
= 0; i
< num_srcs
; ++i
) {
1328 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1331 src_type
.length
= dst_type
.length
;
1334 /* Special case for half-floats */
1335 if (mem_type
.width
== 16 && mem_type
.floating
) {
1336 assert(blend_type
.width
== 32 && blend_type
.floating
);
1337 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1345 src_type
.width
= blend_type
.width
* blend_type
.length
;
1346 blend_type
.length
*= pixels
;
1347 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1349 for (i
= 0; i
< num_srcs
; ++i
) {
1350 LLVMValueRef chans
[4];
1351 LLVMValueRef res
= NULL
;
1353 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1355 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1357 unsigned sa
= src_fmt
->channel
[j
].shift
;
1358 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1359 unsigned from_lsb
= j
;
1361 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1364 mask
= (1 << src_fmt
->channel
[j
].size
) - 1;
1366 /* Extract bits from source */
1367 chans
[j
] = LLVMBuildLShr(builder
,
1369 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1372 chans
[j
] = LLVMBuildAnd(builder
,
1374 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1378 if (src_type
.norm
) {
1379 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1380 blend_type
.width
, chans
[j
], src_type
);
1383 /* Insert bits into correct position */
1384 chans
[j
] = LLVMBuildShl(builder
,
1386 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1392 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1396 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1402 * Convert from blending format to memory format
1404 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1407 convert_from_blend_type(struct gallivm_state
*gallivm
,
1408 unsigned block_size
,
1409 const struct util_format_description
*src_fmt
,
1410 struct lp_type src_type
,
1411 struct lp_type dst_type
,
1412 LLVMValueRef
* src
, // and dst
1415 LLVMValueRef
* dst
= src
;
1417 struct lp_type mem_type
;
1418 struct lp_type blend_type
;
1419 LLVMBuilderRef builder
= gallivm
->builder
;
1420 unsigned pixels
= block_size
/ num_srcs
;
1424 * full custom path for packed floats and srgb formats - none of the later
1425 * functions would do anything useful, and given the lp_type representation they
1426 * can't be fixed. Should really have some SoA blend path for these kind of
1427 * formats rather than hacking them in here.
1429 if (format_expands_to_float_soa(src_fmt
)) {
1431 * This is pretty suboptimal for this case blending in SoA would be much
1432 * better - we need to transpose the AoS values back to SoA values for
1433 * conversion/packing.
1435 assert(src_type
.floating
);
1436 assert(src_type
.width
== 32);
1437 assert(src_type
.length
% 4 == 0);
1438 assert(dst_type
.width
== 32 || dst_type
.width
== 16);
1440 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1441 LLVMValueRef tmpsoa
[4], tmpdst
;
1442 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1443 /* really really need SoA here */
1445 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1446 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1449 tmpdst
= lp_build_float_to_srgb_packed(gallivm
, src_fmt
,
1453 if (src_type
.length
== 8) {
1454 LLVMValueRef tmpaos
, shuffles
[8];
1457 * for 8-wide aos transpose has given us wrong order not matching
1458 * output order. HMPF. Also need to split the output values manually.
1460 for (j
= 0; j
< 4; j
++) {
1461 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1462 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1464 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1465 LLVMConstVector(shuffles
, 8), "");
1466 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1467 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1473 if (dst_type
.width
== 16) {
1474 struct lp_type type16x8
= dst_type
;
1475 struct lp_type type32x4
= dst_type
;
1476 LLVMTypeRef ltype16x4
, ltypei64
, ltypei128
;
1477 unsigned num_fetch
= src_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1478 type16x8
.length
= 8;
1479 type32x4
.width
= 32;
1480 ltypei128
= LLVMIntTypeInContext(gallivm
->context
, 128);
1481 ltypei64
= LLVMIntTypeInContext(gallivm
->context
, 64);
1482 ltype16x4
= lp_build_vec_type(gallivm
, dst_type
);
1483 /* We could do vector truncation but it doesn't generate very good code */
1484 for (i
= 0; i
< num_fetch
; i
++) {
1485 src
[i
] = lp_build_pack2(gallivm
, type32x4
, type16x8
,
1486 src
[i
], lp_build_zero(gallivm
, type32x4
));
1487 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltypei128
, "");
1488 src
[i
] = LLVMBuildTrunc(builder
, src
[i
], ltypei64
, "");
1489 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltype16x4
, "");
1495 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1496 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1498 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
1500 /* Special case for half-floats */
1501 if (mem_type
.width
== 16 && mem_type
.floating
) {
1502 int length
= dst_type
.length
;
1503 assert(blend_type
.width
== 32 && blend_type
.floating
);
1505 dst_type
.length
= src_type
.length
;
1507 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1509 dst_type
.length
= length
;
1513 /* Remove any padding */
1514 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
1515 src_type
.length
-= (src_type
.length
% mem_type
.length
);
1517 for (i
= 0; i
< num_srcs
; ++i
) {
1518 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
1522 /* No bit arithmetic to do */
1527 src_type
.length
= pixels
;
1528 src_type
.width
= blend_type
.length
* blend_type
.width
;
1529 dst_type
.length
= pixels
;
1531 for (i
= 0; i
< num_srcs
; ++i
) {
1532 LLVMValueRef chans
[4];
1533 LLVMValueRef res
= NULL
;
1535 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1537 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1539 unsigned sa
= src_fmt
->channel
[j
].shift
;
1540 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1541 unsigned from_lsb
= j
;
1543 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1546 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
1548 for (k
= 0; k
< blend_type
.width
; ++k
) {
1553 chans
[j
] = LLVMBuildLShr(builder
,
1555 lp_build_const_int_vec(gallivm
, src_type
,
1556 from_lsb
* blend_type
.width
),
1559 chans
[j
] = LLVMBuildAnd(builder
,
1561 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1564 /* Scale down bits */
1565 if (src_type
.norm
) {
1566 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
1567 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
1571 chans
[j
] = LLVMBuildShl(builder
,
1573 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1576 sa
+= src_fmt
->channel
[j
].size
;
1581 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1585 assert (dst_type
.width
!= 24);
1587 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
1593 * Convert alpha to same blend type as src
1596 convert_alpha(struct gallivm_state
*gallivm
,
1597 struct lp_type row_type
,
1598 struct lp_type alpha_type
,
1599 const unsigned block_size
,
1600 const unsigned block_height
,
1601 const unsigned src_count
,
1602 const unsigned dst_channels
,
1603 const bool pad_inline
,
1604 LLVMValueRef
* src_alpha
)
1606 LLVMBuilderRef builder
= gallivm
->builder
;
1608 unsigned length
= row_type
.length
;
1609 row_type
.length
= alpha_type
.length
;
1611 /* Twiddle the alpha to match pixels */
1612 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
);
1615 * TODO this should use single lp_build_conv call for
1616 * src_count == 1 && dst_channels == 1 case (dropping the concat below)
1618 for (i
= 0; i
< block_height
; ++i
) {
1619 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
1622 alpha_type
= row_type
;
1623 row_type
.length
= length
;
1625 /* If only one channel we can only need the single alpha value per pixel */
1626 if (src_count
== 1 && dst_channels
== 1) {
1628 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
, src_count
);
1630 /* If there are more srcs than rows then we need to split alpha up */
1631 if (src_count
> block_height
) {
1632 for (i
= src_count
; i
> 0; --i
) {
1633 unsigned pixels
= block_size
/ src_count
;
1634 unsigned idx
= i
- 1;
1636 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4],
1637 (idx
* pixels
) % 4, pixels
);
1641 /* If there is a src for each pixel broadcast the alpha across whole row */
1642 if (src_count
== block_size
) {
1643 for (i
= 0; i
< src_count
; ++i
) {
1644 src_alpha
[i
] = lp_build_broadcast(gallivm
,
1645 lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
1648 unsigned pixels
= block_size
/ src_count
;
1649 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
1650 unsigned alpha_span
= 1;
1651 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
1653 /* Check if we need 2 src_alphas for our shuffles */
1654 if (pixels
> alpha_type
.length
) {
1658 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
1659 for (j
= 0; j
< row_type
.length
; ++j
) {
1660 if (j
< pixels
* channels
) {
1661 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
1663 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
1667 for (i
= 0; i
< src_count
; ++i
) {
1668 unsigned idx1
= i
, idx2
= i
;
1670 if (alpha_span
> 1){
1675 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
1678 LLVMConstVector(shuffles
, row_type
.length
),
1687 * Generates the blend function for unswizzled colour buffers
1688 * Also generates the read & write from colour buffer
1691 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
1693 struct lp_fragment_shader_variant
*variant
,
1694 enum pipe_format out_format
,
1695 unsigned int num_fs
,
1696 struct lp_type fs_type
,
1697 LLVMValueRef
* fs_mask
,
1698 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
1699 LLVMValueRef context_ptr
,
1700 LLVMValueRef color_ptr
,
1701 LLVMValueRef stride
,
1702 unsigned partial_mask
,
1705 const unsigned alpha_channel
= 3;
1706 const unsigned block_width
= LP_RASTER_BLOCK_SIZE
;
1707 const unsigned block_height
= LP_RASTER_BLOCK_SIZE
;
1708 const unsigned block_size
= block_width
* block_height
;
1709 const unsigned lp_integer_vector_width
= 128;
1711 LLVMBuilderRef builder
= gallivm
->builder
;
1712 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
1713 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
1714 LLVMValueRef src_alpha
[4 * 4];
1715 LLVMValueRef src1_alpha
[4 * 4] = { NULL
};
1716 LLVMValueRef src_mask
[4 * 4];
1717 LLVMValueRef src
[4 * 4];
1718 LLVMValueRef src1
[4 * 4];
1719 LLVMValueRef dst
[4 * 4];
1720 LLVMValueRef blend_color
;
1721 LLVMValueRef blend_alpha
;
1722 LLVMValueRef i32_zero
;
1723 LLVMValueRef check_mask
;
1724 LLVMValueRef undef_src_val
;
1726 struct lp_build_mask_context mask_ctx
;
1727 struct lp_type mask_type
;
1728 struct lp_type blend_type
;
1729 struct lp_type row_type
;
1730 struct lp_type dst_type
;
1731 struct lp_type ls_type
;
1733 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
1734 unsigned vector_width
;
1735 unsigned src_channels
= TGSI_NUM_CHANNELS
;
1736 unsigned dst_channels
;
1741 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
1743 unsigned dst_alignment
;
1745 bool pad_inline
= is_arithmetic_format(out_format_desc
);
1746 bool has_alpha
= false;
1747 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
1748 util_blend_state_is_dual(&variant
->key
.blend
, 0);
1750 const boolean is_1d
= variant
->key
.resource_1d
;
1751 boolean twiddle_after_convert
= FALSE
;
1752 unsigned num_fullblock_fs
= is_1d
? 2 * num_fs
: num_fs
;
1753 LLVMValueRef fpstate
= 0;
1755 /* Get type from output format */
1756 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
1757 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
1760 * Technically this code should go into lp_build_smallfloat_to_float
1761 * and lp_build_float_to_smallfloat but due to the
1762 * http://llvm.org/bugs/show_bug.cgi?id=6393
1763 * llvm reorders the mxcsr intrinsics in a way that breaks the code.
1764 * So the ordering is important here and there shouldn't be any
1765 * llvm ir instrunctions in this function before
1766 * this, otherwise half-float format conversions won't work
1767 * (again due to llvm bug #6393).
1769 if (have_smallfloat_format(dst_type
, out_format
)) {
1770 /* We need to make sure that denorms are ok for half float
1772 fpstate
= lp_build_fpstate_get(gallivm
);
1773 lp_build_fpstate_set_denorms_zero(gallivm
, FALSE
);
1776 mask_type
= lp_int32_vec4_type();
1777 mask_type
.length
= fs_type
.length
;
1779 for (i
= num_fs
; i
< num_fullblock_fs
; i
++) {
1780 fs_mask
[i
] = lp_build_zero(gallivm
, mask_type
);
1783 /* Do not bother executing code when mask is empty.. */
1785 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
1787 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1788 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
1791 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
1792 lp_build_mask_check(&mask_ctx
);
1795 partial_mask
|= !variant
->opaque
;
1796 i32_zero
= lp_build_const_int32(gallivm
, 0);
1798 undef_src_val
= lp_build_undef(gallivm
, fs_type
);
1800 row_type
.length
= fs_type
.length
;
1801 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
1803 /* Compute correct swizzle and count channels */
1804 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
1807 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
1808 /* Ensure channel is used */
1809 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
1813 /* Ensure not already written to (happens in case with GL_ALPHA) */
1814 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
1818 /* Ensure we havn't already found all channels */
1819 if (dst_channels
>= out_format_desc
->nr_channels
) {
1823 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
1826 if (i
== alpha_channel
) {
1831 if (format_expands_to_float_soa(out_format_desc
)) {
1833 * the code above can't work for layout_other
1834 * for srgb it would sort of work but we short-circuit swizzles, etc.
1835 * as that is done as part of unpack / pack.
1837 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
1843 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
1846 /* If 3 channels then pad to include alpha for 4 element transpose */
1847 if (dst_channels
== 3) {
1848 assert (!has_alpha
);
1849 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
1850 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
1853 if (out_format_desc
->nr_channels
== 4) {
1856 * We use alpha from the color conversion, not separate one.
1857 * We had to include it for transpose, hence it will get converted
1858 * too (albeit when doing transpose after conversion, that would
1859 * no longer be the case necessarily).
1860 * (It works only with 4 channel dsts, e.g. rgbx formats, because
1861 * otherwise we really have padding, not alpha, included.)
1868 * Load shader output
1870 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1871 /* Always load alpha for use in blending */
1874 alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
1877 alpha
= undef_src_val
;
1880 /* Load each channel */
1881 for (j
= 0; j
< dst_channels
; ++j
) {
1882 assert(swizzle
[j
] < 4);
1884 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
1887 fs_src
[i
][j
] = undef_src_val
;
1891 /* If 3 channels then pad to include alpha for 4 element transpose */
1893 * XXX If we include that here maybe could actually use it instead of
1894 * separate alpha for blending?
1895 * (Difficult though we actually convert pad channels, not alpha.)
1897 if (dst_channels
== 3 && !has_alpha
) {
1898 fs_src
[i
][3] = alpha
;
1901 /* We split the row_mask and row_alpha as we want 128bit interleave */
1902 if (fs_type
.length
== 8) {
1903 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
],
1905 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
],
1906 src_channels
, src_channels
);
1908 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1909 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
1910 src_channels
, src_channels
);
1912 src_mask
[i
] = fs_mask
[i
];
1913 src_alpha
[i
] = alpha
;
1916 if (dual_source_blend
) {
1917 /* same as above except different src/dst, skip masks and comments... */
1918 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1921 alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
1924 alpha
= undef_src_val
;
1927 for (j
= 0; j
< dst_channels
; ++j
) {
1928 assert(swizzle
[j
] < 4);
1930 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
1933 fs_src1
[i
][j
] = undef_src_val
;
1936 if (dst_channels
== 3 && !has_alpha
) {
1937 fs_src1
[i
][3] = alpha
;
1939 if (fs_type
.length
== 8) {
1940 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1941 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
1942 src_channels
, src_channels
);
1944 src1_alpha
[i
] = alpha
;
1949 if (util_format_is_pure_integer(out_format
)) {
1951 * In this case fs_type was really ints or uints disguised as floats,
1954 fs_type
.floating
= 0;
1955 fs_type
.sign
= dst_type
.sign
;
1956 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1957 for (j
= 0; j
< dst_channels
; ++j
) {
1958 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
1959 lp_build_vec_type(gallivm
, fs_type
), "");
1961 if (dst_channels
== 3 && !has_alpha
) {
1962 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
1963 lp_build_vec_type(gallivm
, fs_type
), "");
1969 * We actually should generally do conversion first (for non-1d cases)
1970 * when the blend format is 8 or 16 bits. The reason is obvious,
1971 * there's 2 or 4 times less vectors to deal with for the interleave...
1972 * Albeit for the AVX (not AVX2) case there's no benefit with 16 bit
1973 * vectors (as it can do 32bit unpack with 256bit vectors, but 8/16bit
1974 * unpack only with 128bit vectors).
1975 * Note: for 16bit sizes really need matching pack conversion code
1977 if (!is_1d
&& dst_channels
!= 3 && dst_type
.width
== 8) {
1978 twiddle_after_convert
= TRUE
;
1982 * Pixel twiddle from fragment shader order to memory order
1984 if (!twiddle_after_convert
) {
1985 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
,
1986 dst_channels
, fs_src
, src
, pad_inline
);
1987 if (dual_source_blend
) {
1988 generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
, dst_channels
,
1989 fs_src1
, src1
, pad_inline
);
1992 src_count
= num_fullblock_fs
* dst_channels
;
1994 * We reorder things a bit here, so the cases for 4-wide and 8-wide
1995 * (AVX) turn out the same later when untwiddling/transpose (albeit
1996 * for true AVX2 path untwiddle needs to be different).
1997 * For now just order by colors first (so we can use unpack later).
1999 for (j
= 0; j
< num_fullblock_fs
; j
++) {
2000 for (i
= 0; i
< dst_channels
; i
++) {
2001 src
[i
*num_fullblock_fs
+ j
] = fs_src
[j
][i
];
2002 if (dual_source_blend
) {
2003 src1
[i
*num_fullblock_fs
+ j
] = fs_src1
[j
][i
];
2009 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
2010 if (src_count
!= num_fullblock_fs
* src_channels
) {
2011 unsigned ds
= src_count
/ (num_fullblock_fs
* src_channels
);
2012 row_type
.length
/= ds
;
2013 fs_type
.length
= row_type
.length
;
2016 blend_type
= row_type
;
2017 mask_type
.length
= 4;
2019 /* Convert src to row_type */
2020 if (dual_source_blend
) {
2021 struct lp_type old_row_type
= row_type
;
2022 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2023 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
2026 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2029 /* If the rows are not an SSE vector, combine them to become SSE size! */
2030 if ((row_type
.width
* row_type
.length
) % 128) {
2031 unsigned bits
= row_type
.width
* row_type
.length
;
2034 assert(src_count
>= (vector_width
/ bits
));
2036 dst_count
= src_count
/ (vector_width
/ bits
);
2038 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
2039 if (dual_source_blend
) {
2040 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
2043 row_type
.length
*= combined
;
2044 src_count
/= combined
;
2046 bits
= row_type
.width
* row_type
.length
;
2047 assert(bits
== 128 || bits
== 256);
2050 if (twiddle_after_convert
) {
2051 fs_twiddle_transpose(gallivm
, row_type
, src
, src_count
, src
);
2052 if (dual_source_blend
) {
2053 fs_twiddle_transpose(gallivm
, row_type
, src1
, src_count
, src1
);
2058 * Blend Colour conversion
2060 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
2061 blend_color
= LLVMBuildPointerCast(builder
, blend_color
,
2062 LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
2063 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
,
2064 &i32_zero
, 1, ""), "");
2067 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
2069 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
2071 * since blending is done with floats, there was no conversion.
2072 * However, the rules according to fixed point renderbuffers still
2073 * apply, that is we must clamp inputs to 0.0/1.0.
2074 * (This would apply to separate alpha conversion too but we currently
2075 * force has_alpha to be true.)
2076 * TODO: should skip this with "fake" blend, since post-blend conversion
2077 * will clamp anyway.
2078 * TODO: could also skip this if fragment color clamping is enabled. We
2079 * don't support it natively so it gets baked into the shader however, so
2080 * can't really tell here.
2082 struct lp_build_context f32_bld
;
2083 assert(row_type
.floating
);
2084 lp_build_context_init(&f32_bld
, gallivm
, row_type
);
2085 for (i
= 0; i
< src_count
; i
++) {
2086 src
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src
[i
]);
2088 if (dual_source_blend
) {
2089 for (i
= 0; i
< src_count
; i
++) {
2090 src1
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src1
[i
]);
2093 /* probably can't be different than row_type but better safe than sorry... */
2094 lp_build_context_init(&f32_bld
, gallivm
, blend_type
);
2095 blend_color
= lp_build_clamp(&f32_bld
, blend_color
, f32_bld
.zero
, f32_bld
.one
);
2099 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
2101 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
2102 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
2104 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
2105 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
2107 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
2108 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
2114 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], block_height
, &src_mask
[0]);
2116 if (src_count
< block_height
) {
2117 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
2118 } else if (src_count
> block_height
) {
2119 for (i
= src_count
; i
> 0; --i
) {
2120 unsigned pixels
= block_size
/ src_count
;
2121 unsigned idx
= i
- 1;
2123 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4],
2124 (idx
* pixels
) % 4, pixels
);
2128 assert(mask_type
.width
== 32);
2130 for (i
= 0; i
< src_count
; ++i
) {
2131 unsigned pixels
= block_size
/ src_count
;
2132 unsigned pixel_width
= row_type
.width
* dst_channels
;
2134 if (pixel_width
== 24) {
2135 mask_type
.width
= 8;
2136 mask_type
.length
= vector_width
/ mask_type
.width
;
2138 mask_type
.length
= pixels
;
2139 mask_type
.width
= row_type
.width
* dst_channels
;
2142 * If mask_type width is smaller than 32bit, this doesn't quite
2143 * generate the most efficient code (could use some pack).
2145 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
],
2146 lp_build_int_vec_type(gallivm
, mask_type
), "");
2148 mask_type
.length
*= dst_channels
;
2149 mask_type
.width
/= dst_channels
;
2152 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
],
2153 lp_build_int_vec_type(gallivm
, mask_type
), "");
2154 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
2161 struct lp_type alpha_type
= fs_type
;
2162 alpha_type
.length
= 4;
2163 convert_alpha(gallivm
, row_type
, alpha_type
,
2164 block_size
, block_height
,
2165 src_count
, dst_channels
,
2166 pad_inline
, src_alpha
);
2167 if (dual_source_blend
) {
2168 convert_alpha(gallivm
, row_type
, alpha_type
,
2169 block_size
, block_height
,
2170 src_count
, dst_channels
,
2171 pad_inline
, src1_alpha
);
2177 * Load dst from memory
2179 if (src_count
< block_height
) {
2180 dst_count
= block_height
;
2182 dst_count
= src_count
;
2185 dst_type
.length
*= block_size
/ dst_count
;
2187 if (format_expands_to_float_soa(out_format_desc
)) {
2189 * we need multiple values at once for the conversion, so can as well
2190 * load them vectorized here too instead of concatenating later.
2191 * (Still need concatenation later for 8-wide vectors).
2193 dst_count
= block_height
;
2194 dst_type
.length
= block_width
;
2198 * Compute the alignment of the destination pointer in bytes
2199 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
2200 * are always aligned by MIN2(16, fetch_width) except for buffers (not
2201 * 1d tex but can't distinguish here) so need to stick with per-pixel
2202 * alignment in this case.
2205 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
2208 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
2210 /* Force power-of-two alignment by extracting only the least-significant-bit */
2211 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
2213 * Resource base and stride pointers are aligned to 16 bytes, so that's
2214 * the maximum alignment we can guarantee
2216 dst_alignment
= MIN2(16, dst_alignment
);
2220 if (dst_count
> src_count
) {
2221 if ((dst_type
.width
== 8 || dst_type
.width
== 16) &&
2222 util_is_power_of_two(dst_type
.length
) &&
2223 dst_type
.length
* dst_type
.width
< 128) {
2225 * Never try to load values as 4xi8 which we will then
2226 * concatenate to larger vectors. This gives llvm a real
2227 * headache (the problem is the type legalizer (?) will
2228 * try to load that as 4xi8 zext to 4xi32 to fill the vector,
2229 * then the shuffles to concatenate are more or less impossible
2230 * - llvm is easily capable of generating a sequence of 32
2231 * pextrb/pinsrb instructions for that. Albeit it appears to
2232 * be fixed in llvm 4.0. So, load and concatenate with 32bit
2233 * width to avoid the trouble (16bit seems not as bad, llvm
2234 * probably recognizes the load+shuffle as only one shuffle
2235 * is necessary, but we can do just the same anyway).
2237 ls_type
.length
= dst_type
.length
* dst_type
.width
/ 32;
2243 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2244 dst
, ls_type
, dst_count
/ 4, dst_alignment
);
2245 for (i
= dst_count
/ 4; i
< dst_count
; i
++) {
2246 dst
[i
] = lp_build_undef(gallivm
, ls_type
);
2251 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2252 dst
, ls_type
, dst_count
, dst_alignment
);
2257 * Convert from dst/output format to src/blending format.
2259 * This is necessary as we can only read 1 row from memory at a time,
2260 * so the minimum dst_count will ever be at this point is 4.
2262 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
2263 * this will take the 4 dsts and combine them into 1 src so we can perform blending
2264 * on all 16 pixels in that single vector at once.
2266 if (dst_count
> src_count
) {
2267 if (ls_type
.length
!= dst_type
.length
&& ls_type
.length
== 1) {
2268 LLVMTypeRef elem_type
= lp_build_elem_type(gallivm
, ls_type
);
2269 LLVMTypeRef ls_vec_type
= LLVMVectorType(elem_type
, 1);
2270 for (i
= 0; i
< dst_count
; i
++) {
2271 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
], ls_vec_type
, "");
2275 lp_build_concat_n(gallivm
, ls_type
, dst
, 4, dst
, src_count
);
2277 if (ls_type
.length
!= dst_type
.length
) {
2278 struct lp_type tmp_type
= dst_type
;
2279 tmp_type
.length
= dst_type
.length
* 4 / src_count
;
2280 for (i
= 0; i
< src_count
; i
++) {
2281 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
],
2282 lp_build_vec_type(gallivm
, tmp_type
), "");
2290 /* XXX this is broken for RGB8 formats -
2291 * they get expanded from 12 to 16 elements (to include alpha)
2292 * by convert_to_blend_type then reduced to 15 instead of 12
2293 * by convert_from_blend_type (a simple fix though breaks A8...).
2294 * R16G16B16 also crashes differently however something going wrong
2295 * inside llvm handling npot vector sizes seemingly.
2296 * It seems some cleanup could be done here (like skipping conversion/blend
2299 convert_to_blend_type(gallivm
, block_size
, out_format_desc
, dst_type
,
2300 row_type
, dst
, src_count
);
2303 * FIXME: Really should get logic ops / masks out of generic blend / row
2304 * format. Logic ops will definitely not work on the blend float format
2305 * used for SRGB here and I think OpenGL expects this to work as expected
2306 * (that is incoming values converted to srgb then logic op applied).
2308 for (i
= 0; i
< src_count
; ++i
) {
2309 dst
[i
] = lp_build_blend_aos(gallivm
,
2310 &variant
->key
.blend
,
2315 has_alpha
? NULL
: src_alpha
[i
],
2317 has_alpha
? NULL
: src1_alpha
[i
],
2319 partial_mask
? src_mask
[i
] : NULL
,
2321 has_alpha
? NULL
: blend_alpha
,
2323 pad_inline
? 4 : dst_channels
);
2326 convert_from_blend_type(gallivm
, block_size
, out_format_desc
,
2327 row_type
, dst_type
, dst
, src_count
);
2329 /* Split the blend rows back to memory rows */
2330 if (dst_count
> src_count
) {
2331 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
2333 if (src_count
== 1) {
2334 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2335 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2337 row_type
.length
/= 2;
2341 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
2342 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
2343 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2344 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2346 row_type
.length
/= 2;
2351 * Store blend result to memory
2354 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2355 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
2358 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2359 dst
, dst_type
, dst_count
, dst_alignment
);
2362 if (have_smallfloat_format(dst_type
, out_format
)) {
2363 lp_build_fpstate_set(gallivm
, fpstate
);
2367 lp_build_mask_end(&mask_ctx
);
2373 * Generate the runtime callable function for the whole fragment pipeline.
2374 * Note that the function which we generate operates on a block of 16
2375 * pixels at at time. The block contains 2x2 quads. Each quad contains
2379 generate_fragment(struct llvmpipe_context
*lp
,
2380 struct lp_fragment_shader
*shader
,
2381 struct lp_fragment_shader_variant
*variant
,
2382 unsigned partial_mask
)
2384 struct gallivm_state
*gallivm
= variant
->gallivm
;
2385 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
2386 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
2388 struct lp_type fs_type
;
2389 struct lp_type blend_type
;
2390 LLVMTypeRef fs_elem_type
;
2391 LLVMTypeRef blend_vec_type
;
2392 LLVMTypeRef arg_types
[13];
2393 LLVMTypeRef func_type
;
2394 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
2395 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
2396 LLVMValueRef context_ptr
;
2399 LLVMValueRef a0_ptr
;
2400 LLVMValueRef dadx_ptr
;
2401 LLVMValueRef dady_ptr
;
2402 LLVMValueRef color_ptr_ptr
;
2403 LLVMValueRef stride_ptr
;
2404 LLVMValueRef depth_ptr
;
2405 LLVMValueRef depth_stride
;
2406 LLVMValueRef mask_input
;
2407 LLVMValueRef thread_data_ptr
;
2408 LLVMBasicBlockRef block
;
2409 LLVMBuilderRef builder
;
2410 struct lp_build_sampler_soa
*sampler
;
2411 struct lp_build_interp_soa_context interp
;
2412 LLVMValueRef fs_mask
[16 / 4];
2413 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2414 LLVMValueRef function
;
2415 LLVMValueRef facing
;
2420 boolean cbuf0_write_all
;
2421 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2422 util_blend_state_is_dual(&key
->blend
, 0);
2424 assert(lp_native_vector_width
/ 32 >= 4);
2426 /* Adjust color input interpolation according to flatshade state:
2428 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2429 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2430 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2432 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2434 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2438 /* check if writes to cbuf[0] are to be copied to all cbufs */
2440 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
];
2442 /* TODO: actually pick these based on the fs and color buffer
2443 * characteristics. */
2445 memset(&fs_type
, 0, sizeof fs_type
);
2446 fs_type
.floating
= TRUE
; /* floating point values */
2447 fs_type
.sign
= TRUE
; /* values are signed */
2448 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2449 fs_type
.width
= 32; /* 32-bit float */
2450 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2452 memset(&blend_type
, 0, sizeof blend_type
);
2453 blend_type
.floating
= FALSE
; /* values are integers */
2454 blend_type
.sign
= FALSE
; /* values are unsigned */
2455 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2456 blend_type
.width
= 8; /* 8-bit ubyte values */
2457 blend_type
.length
= 16; /* 16 elements per vector */
2460 * Generate the function prototype. Any change here must be reflected in
2461 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2464 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2466 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
2468 util_snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
2469 shader
->no
, variant
->no
, partial_mask
? "partial" : "whole");
2471 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
2472 arg_types
[1] = int32_type
; /* x */
2473 arg_types
[2] = int32_type
; /* y */
2474 arg_types
[3] = int32_type
; /* facing */
2475 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
2476 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
2477 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
2478 arg_types
[7] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
2479 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
2480 arg_types
[9] = int32_type
; /* mask_input */
2481 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
2482 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
2483 arg_types
[12] = int32_type
; /* depth_stride */
2485 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
2486 arg_types
, ARRAY_SIZE(arg_types
), 0);
2488 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
2489 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
2491 variant
->function
[partial_mask
] = function
;
2493 /* XXX: need to propagate noalias down into color param now we are
2494 * passing a pointer-to-pointer?
2496 for(i
= 0; i
< ARRAY_SIZE(arg_types
); ++i
)
2497 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
2498 lp_add_function_attr(function
, i
+ 1, LP_FUNC_ATTR_NOALIAS
);
2500 context_ptr
= LLVMGetParam(function
, 0);
2501 x
= LLVMGetParam(function
, 1);
2502 y
= LLVMGetParam(function
, 2);
2503 facing
= LLVMGetParam(function
, 3);
2504 a0_ptr
= LLVMGetParam(function
, 4);
2505 dadx_ptr
= LLVMGetParam(function
, 5);
2506 dady_ptr
= LLVMGetParam(function
, 6);
2507 color_ptr_ptr
= LLVMGetParam(function
, 7);
2508 depth_ptr
= LLVMGetParam(function
, 8);
2509 mask_input
= LLVMGetParam(function
, 9);
2510 thread_data_ptr
= LLVMGetParam(function
, 10);
2511 stride_ptr
= LLVMGetParam(function
, 11);
2512 depth_stride
= LLVMGetParam(function
, 12);
2514 lp_build_name(context_ptr
, "context");
2515 lp_build_name(x
, "x");
2516 lp_build_name(y
, "y");
2517 lp_build_name(a0_ptr
, "a0");
2518 lp_build_name(dadx_ptr
, "dadx");
2519 lp_build_name(dady_ptr
, "dady");
2520 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
2521 lp_build_name(depth_ptr
, "depth");
2522 lp_build_name(mask_input
, "mask_input");
2523 lp_build_name(thread_data_ptr
, "thread_data");
2524 lp_build_name(stride_ptr
, "stride_ptr");
2525 lp_build_name(depth_stride
, "depth_stride");
2531 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
2532 builder
= gallivm
->builder
;
2534 LLVMPositionBuilderAtEnd(builder
, block
);
2536 /* code generated texture sampling */
2537 sampler
= lp_llvm_sampler_soa_create(key
->state
);
2539 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
2540 /* for 1d resources only run "upper half" of stamp */
2541 if (key
->resource_1d
)
2545 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
2546 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
2547 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
2548 num_loop
, "mask_store");
2549 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2550 boolean pixel_center_integer
=
2551 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
];
2554 * The shader input interpolation info is not explicitely baked in the
2555 * shader key, but everything it derives from (TGSI, and flatshade) is
2556 * already included in the shader key.
2558 lp_build_interp_soa_init(&interp
,
2560 shader
->info
.base
.num_inputs
,
2562 pixel_center_integer
,
2565 a0_ptr
, dadx_ptr
, dady_ptr
,
2568 for (i
= 0; i
< num_fs
; i
++) {
2570 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2571 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2572 &indexi
, 1, "mask_ptr");
2575 mask
= generate_quad_mask(gallivm
, fs_type
,
2576 i
*fs_type
.length
/4, mask_input
);
2579 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
2581 LLVMBuildStore(builder
, mask
, mask_ptr
);
2584 generate_fs_loop(gallivm
,
2592 mask_store
, /* output */
2599 for (i
= 0; i
< num_fs
; i
++) {
2600 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2601 LLVMValueRef ptr
= LLVMBuildGEP(builder
, mask_store
,
2603 fs_mask
[i
] = LLVMBuildLoad(builder
, ptr
, "mask");
2604 /* This is fucked up need to reorganize things */
2605 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2606 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2607 ptr
= LLVMBuildGEP(builder
,
2608 color_store
[cbuf
* !cbuf0_write_all
][chan
],
2610 fs_out_color
[cbuf
][chan
][i
] = ptr
;
2613 if (dual_source_blend
) {
2614 /* only support one dual source blend target hence always use output 1 */
2615 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2616 ptr
= LLVMBuildGEP(builder
,
2617 color_store
[1][chan
],
2619 fs_out_color
[1][chan
][i
] = ptr
;
2625 sampler
->destroy(sampler
);
2627 /* Loop over color outputs / color buffers to do blending.
2629 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2630 if (key
->cbuf_format
[cbuf
] != PIPE_FORMAT_NONE
) {
2631 LLVMValueRef color_ptr
;
2632 LLVMValueRef stride
;
2633 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
2635 boolean do_branch
= ((key
->depth
.enabled
2636 || key
->stencil
[0].enabled
2637 || key
->alpha
.enabled
)
2638 && !shader
->info
.base
.uses_kill
);
2640 color_ptr
= LLVMBuildLoad(builder
,
2641 LLVMBuildGEP(builder
, color_ptr_ptr
,
2645 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
2647 stride
= LLVMBuildLoad(builder
,
2648 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
2651 generate_unswizzled_blend(gallivm
, cbuf
, variant
,
2652 key
->cbuf_format
[cbuf
],
2653 num_fs
, fs_type
, fs_mask
, fs_out_color
,
2654 context_ptr
, color_ptr
, stride
,
2655 partial_mask
, do_branch
);
2659 LLVMBuildRetVoid(builder
);
2661 gallivm_verify_function(gallivm
, function
);
2666 dump_fs_variant_key(const struct lp_fragment_shader_variant_key
*key
)
2670 debug_printf("fs variant %p:\n", (void *) key
);
2672 if (key
->flatshade
) {
2673 debug_printf("flatshade = 1\n");
2675 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
2676 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
2678 if (key
->depth
.enabled
|| key
->stencil
[0].enabled
) {
2679 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
2681 if (key
->depth
.enabled
) {
2682 debug_printf("depth.func = %s\n", util_dump_func(key
->depth
.func
, TRUE
));
2683 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
2686 for (i
= 0; i
< 2; ++i
) {
2687 if (key
->stencil
[i
].enabled
) {
2688 debug_printf("stencil[%u].func = %s\n", i
, util_dump_func(key
->stencil
[i
].func
, TRUE
));
2689 debug_printf("stencil[%u].fail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
2690 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
2691 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
2692 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
2693 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
2697 if (key
->alpha
.enabled
) {
2698 debug_printf("alpha.func = %s\n", util_dump_func(key
->alpha
.func
, TRUE
));
2701 if (key
->occlusion_count
) {
2702 debug_printf("occlusion_count = 1\n");
2705 if (key
->blend
.logicop_enable
) {
2706 debug_printf("blend.logicop_func = %s\n", util_dump_logicop(key
->blend
.logicop_func
, TRUE
));
2708 else if (key
->blend
.rt
[0].blend_enable
) {
2709 debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
2710 debug_printf("blend.rgb_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
2711 debug_printf("blend.rgb_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
2712 debug_printf("blend.alpha_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
2713 debug_printf("blend.alpha_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
2714 debug_printf("blend.alpha_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
2716 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
2717 if (key
->blend
.alpha_to_coverage
) {
2718 debug_printf("blend.alpha_to_coverage is enabled\n");
2720 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
2721 const struct lp_static_sampler_state
*sampler
= &key
->state
[i
].sampler_state
;
2722 debug_printf("sampler[%u] = \n", i
);
2723 debug_printf(" .wrap = %s %s %s\n",
2724 util_dump_tex_wrap(sampler
->wrap_s
, TRUE
),
2725 util_dump_tex_wrap(sampler
->wrap_t
, TRUE
),
2726 util_dump_tex_wrap(sampler
->wrap_r
, TRUE
));
2727 debug_printf(" .min_img_filter = %s\n",
2728 util_dump_tex_filter(sampler
->min_img_filter
, TRUE
));
2729 debug_printf(" .min_mip_filter = %s\n",
2730 util_dump_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
2731 debug_printf(" .mag_img_filter = %s\n",
2732 util_dump_tex_filter(sampler
->mag_img_filter
, TRUE
));
2733 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
2734 debug_printf(" .compare_func = %s\n", util_dump_func(sampler
->compare_func
, TRUE
));
2735 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
2736 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
2737 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
2738 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
2739 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
2741 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2742 const struct lp_static_texture_state
*texture
= &key
->state
[i
].texture_state
;
2743 debug_printf("texture[%u] = \n", i
);
2744 debug_printf(" .format = %s\n",
2745 util_format_name(texture
->format
));
2746 debug_printf(" .target = %s\n",
2747 util_dump_tex_target(texture
->target
, TRUE
));
2748 debug_printf(" .level_zero_only = %u\n",
2749 texture
->level_zero_only
);
2750 debug_printf(" .pot = %u %u %u\n",
2752 texture
->pot_height
,
2753 texture
->pot_depth
);
2759 lp_debug_fs_variant(const struct lp_fragment_shader_variant
*variant
)
2761 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
2762 variant
->shader
->no
, variant
->no
);
2763 tgsi_dump(variant
->shader
->base
.tokens
, 0);
2764 dump_fs_variant_key(&variant
->key
);
2765 debug_printf("variant->opaque = %u\n", variant
->opaque
);
2771 * Generate a new fragment shader variant from the shader code and
2772 * other state indicated by the key.
2774 static struct lp_fragment_shader_variant
*
2775 generate_variant(struct llvmpipe_context
*lp
,
2776 struct lp_fragment_shader
*shader
,
2777 const struct lp_fragment_shader_variant_key
*key
)
2779 struct lp_fragment_shader_variant
*variant
;
2780 const struct util_format_description
*cbuf0_format_desc
;
2781 boolean fullcolormask
;
2782 char module_name
[64];
2784 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
2788 util_snprintf(module_name
, sizeof(module_name
), "fs%u_variant%u",
2789 shader
->no
, shader
->variants_created
);
2791 variant
->gallivm
= gallivm_create(module_name
, lp
->context
);
2792 if (!variant
->gallivm
) {
2797 variant
->shader
= shader
;
2798 variant
->list_item_global
.base
= variant
;
2799 variant
->list_item_local
.base
= variant
;
2800 variant
->no
= shader
->variants_created
++;
2802 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
2805 * Determine whether we are touching all channels in the color buffer.
2807 fullcolormask
= FALSE
;
2808 if (key
->nr_cbufs
== 1) {
2809 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
2810 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
2814 !key
->blend
.logicop_enable
&&
2815 !key
->blend
.rt
[0].blend_enable
&&
2817 !key
->stencil
[0].enabled
&&
2818 !key
->alpha
.enabled
&&
2819 !key
->blend
.alpha_to_coverage
&&
2820 !key
->depth
.enabled
&&
2821 !shader
->info
.base
.uses_kill
2824 if ((shader
->info
.base
.num_tokens
<= 1) &&
2825 !key
->depth
.enabled
&& !key
->stencil
[0].enabled
) {
2826 variant
->ps_inv_multiplier
= 0;
2828 variant
->ps_inv_multiplier
= 1;
2831 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
2832 lp_debug_fs_variant(variant
);
2835 lp_jit_init_types(variant
);
2837 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
2838 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
2840 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
2841 if (variant
->opaque
) {
2842 /* Specialized shader, which doesn't need to read the color buffer. */
2843 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
2848 * Compile everything
2851 gallivm_compile_module(variant
->gallivm
);
2853 variant
->nr_instrs
+= lp_build_count_ir_module(variant
->gallivm
->module
);
2855 if (variant
->function
[RAST_EDGE_TEST
]) {
2856 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
2857 gallivm_jit_function(variant
->gallivm
,
2858 variant
->function
[RAST_EDGE_TEST
]);
2861 if (variant
->function
[RAST_WHOLE
]) {
2862 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
2863 gallivm_jit_function(variant
->gallivm
,
2864 variant
->function
[RAST_WHOLE
]);
2865 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
2866 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
2869 gallivm_free_ir(variant
->gallivm
);
2876 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
2877 const struct pipe_shader_state
*templ
)
2879 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2880 struct lp_fragment_shader
*shader
;
2882 int nr_sampler_views
;
2885 shader
= CALLOC_STRUCT(lp_fragment_shader
);
2889 shader
->no
= fs_no
++;
2890 make_empty_list(&shader
->variants
);
2892 /* get/save the summary info for this shader */
2893 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
2895 /* we need to keep a local copy of the tokens */
2896 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
2898 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
2899 if (shader
->draw_data
== NULL
) {
2900 FREE((void *) shader
->base
.tokens
);
2905 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2906 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2908 shader
->variant_key_size
= Offset(struct lp_fragment_shader_variant_key
,
2909 state
[MAX2(nr_samplers
, nr_sampler_views
)]);
2911 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2912 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
2913 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
2915 switch (shader
->info
.base
.input_interpolate
[i
]) {
2916 case TGSI_INTERPOLATE_CONSTANT
:
2917 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2919 case TGSI_INTERPOLATE_LINEAR
:
2920 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
2922 case TGSI_INTERPOLATE_PERSPECTIVE
:
2923 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2925 case TGSI_INTERPOLATE_COLOR
:
2926 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
2933 switch (shader
->info
.base
.input_semantic_name
[i
]) {
2934 case TGSI_SEMANTIC_FACE
:
2935 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
2937 case TGSI_SEMANTIC_POSITION
:
2938 /* Position was already emitted above
2940 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
2941 shader
->inputs
[i
].src_index
= 0;
2945 /* XXX this is a completely pointless index map... */
2946 shader
->inputs
[i
].src_index
= i
+1;
2949 if (LP_DEBUG
& DEBUG_TGSI
) {
2951 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
2952 shader
->no
, (void *) shader
);
2953 tgsi_dump(templ
->tokens
, 0);
2954 debug_printf("usage masks:\n");
2955 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
2956 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
2957 debug_printf(" IN[%u].%s%s%s%s\n",
2959 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
2960 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
2961 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
2962 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
2972 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
2974 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2976 if (llvmpipe
->fs
== fs
)
2979 llvmpipe
->fs
= (struct lp_fragment_shader
*) fs
;
2981 draw_bind_fragment_shader(llvmpipe
->draw
,
2982 (llvmpipe
->fs
? llvmpipe
->fs
->draw_data
: NULL
));
2984 llvmpipe
->dirty
|= LP_NEW_FS
;
2989 * Remove shader variant from two lists: the shader's variant list
2990 * and the context's variant list.
2993 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
2994 struct lp_fragment_shader_variant
*variant
)
2996 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
2997 debug_printf("llvmpipe: del fs #%u var #%u v created #%u v cached"
2998 " #%u v total cached #%u\n",
2999 variant
->shader
->no
,
3001 variant
->shader
->variants_created
,
3002 variant
->shader
->variants_cached
,
3003 lp
->nr_fs_variants
);
3006 gallivm_destroy(variant
->gallivm
);
3008 /* remove from shader's list */
3009 remove_from_list(&variant
->list_item_local
);
3010 variant
->shader
->variants_cached
--;
3012 /* remove from context's list */
3013 remove_from_list(&variant
->list_item_global
);
3014 lp
->nr_fs_variants
--;
3015 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
3022 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
3024 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3025 struct lp_fragment_shader
*shader
= fs
;
3026 struct lp_fs_variant_list_item
*li
;
3028 assert(fs
!= llvmpipe
->fs
);
3031 * XXX: we need to flush the context until we have some sort of reference
3032 * counting in fragment shaders as they may still be binned
3033 * Flushing alone might not sufficient we need to wait on it too.
3035 llvmpipe_finish(pipe
, __FUNCTION__
);
3037 /* Delete all the variants */
3038 li
= first_elem(&shader
->variants
);
3039 while(!at_end(&shader
->variants
, li
)) {
3040 struct lp_fs_variant_list_item
*next
= next_elem(li
);
3041 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
3045 /* Delete draw module's data */
3046 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
3048 assert(shader
->variants_cached
== 0);
3049 FREE((void *) shader
->base
.tokens
);
3056 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
3057 enum pipe_shader_type shader
, uint index
,
3058 const struct pipe_constant_buffer
*cb
)
3060 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3061 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
3063 assert(shader
< PIPE_SHADER_TYPES
);
3064 assert(index
< ARRAY_SIZE(llvmpipe
->constants
[shader
]));
3066 /* note: reference counting */
3067 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
3070 if (!(constants
->bind
& PIPE_BIND_CONSTANT_BUFFER
)) {
3071 debug_printf("Illegal set constant without bind flag\n");
3072 constants
->bind
|= PIPE_BIND_CONSTANT_BUFFER
;
3076 if (shader
== PIPE_SHADER_VERTEX
||
3077 shader
== PIPE_SHADER_GEOMETRY
) {
3078 /* Pass the constants to the 'draw' module */
3079 const unsigned size
= cb
? cb
->buffer_size
: 0;
3083 data
= (ubyte
*) llvmpipe_resource_data(constants
);
3085 else if (cb
&& cb
->user_buffer
) {
3086 data
= (ubyte
*) cb
->user_buffer
;
3093 data
+= cb
->buffer_offset
;
3095 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
3099 llvmpipe
->dirty
|= LP_NEW_FS_CONSTANTS
;
3102 if (cb
&& cb
->user_buffer
) {
3103 pipe_resource_reference(&constants
, NULL
);
3109 * Return the blend factor equivalent to a destination alpha of one.
3111 static inline unsigned
3112 force_dst_alpha_one(unsigned factor
, boolean clamped_zero
)
3115 case PIPE_BLENDFACTOR_DST_ALPHA
:
3116 return PIPE_BLENDFACTOR_ONE
;
3117 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
3118 return PIPE_BLENDFACTOR_ZERO
;
3119 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
3121 return PIPE_BLENDFACTOR_ZERO
;
3123 return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
;
3131 * We need to generate several variants of the fragment pipeline to match
3132 * all the combinations of the contributing state atoms.
3134 * TODO: there is actually no reason to tie this to context state -- the
3135 * generated code could be cached globally in the screen.
3138 make_variant_key(struct llvmpipe_context
*lp
,
3139 struct lp_fragment_shader
*shader
,
3140 struct lp_fragment_shader_variant_key
*key
)
3144 memset(key
, 0, shader
->variant_key_size
);
3146 if (lp
->framebuffer
.zsbuf
) {
3147 enum pipe_format zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
3148 const struct util_format_description
*zsbuf_desc
=
3149 util_format_description(zsbuf_format
);
3151 if (lp
->depth_stencil
->depth
.enabled
&&
3152 util_format_has_depth(zsbuf_desc
)) {
3153 key
->zsbuf_format
= zsbuf_format
;
3154 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
3156 if (lp
->depth_stencil
->stencil
[0].enabled
&&
3157 util_format_has_stencil(zsbuf_desc
)) {
3158 key
->zsbuf_format
= zsbuf_format
;
3159 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
3161 if (llvmpipe_resource_is_1d(lp
->framebuffer
.zsbuf
->texture
)) {
3162 key
->resource_1d
= TRUE
;
3167 * Propagate the depth clamp setting from the rasterizer state.
3168 * depth_clip == 0 implies depth clamping is enabled.
3170 * When clip_halfz is enabled, then always clamp the depth values.
3172 * XXX: This is incorrect for GL, but correct for d3d10 (depth
3173 * clamp is always active in d3d10, regardless if depth clip is
3175 * (GL has an always-on [0,1] clamp on fs depth output instead
3176 * to ensure the depth values stay in range. Doesn't look like
3177 * we do that, though...)
3179 if (lp
->rasterizer
->clip_halfz
) {
3180 key
->depth_clamp
= 1;
3182 key
->depth_clamp
= (lp
->rasterizer
->depth_clip
== 0) ? 1 : 0;
3185 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
3186 if (!lp
->framebuffer
.nr_cbufs
||
3187 !lp
->framebuffer
.cbufs
[0] ||
3188 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
3189 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
3191 if(key
->alpha
.enabled
)
3192 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
3193 /* alpha.ref_value is passed in jit_context */
3195 key
->flatshade
= lp
->rasterizer
->flatshade
;
3196 if (lp
->active_occlusion_queries
) {
3197 key
->occlusion_count
= TRUE
;
3200 if (lp
->framebuffer
.nr_cbufs
) {
3201 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
3204 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
3206 if (!key
->blend
.independent_blend_enable
) {
3207 /* we always need independent blend otherwise the fixups below won't work */
3208 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
3209 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
3211 key
->blend
.independent_blend_enable
= 1;
3214 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
3215 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
3217 if (lp
->framebuffer
.cbufs
[i
]) {
3218 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
3219 const struct util_format_description
*format_desc
;
3221 key
->cbuf_format
[i
] = format
;
3224 * Figure out if this is a 1d resource. Note that OpenGL allows crazy
3225 * mixing of 2d textures with height 1 and 1d textures, so make sure
3226 * we pick 1d if any cbuf or zsbuf is 1d.
3228 if (llvmpipe_resource_is_1d(lp
->framebuffer
.cbufs
[i
]->texture
)) {
3229 key
->resource_1d
= TRUE
;
3232 format_desc
= util_format_description(format
);
3233 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
3234 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
3237 * Mask out color channels not present in the color buffer.
3239 blend_rt
->colormask
&= util_format_colormask(format_desc
);
3242 * Disable blend for integer formats.
3244 if (util_format_is_pure_integer(format
)) {
3245 blend_rt
->blend_enable
= 0;
3249 * Our swizzled render tiles always have an alpha channel, but the
3250 * linear render target format often does not, so force here the dst
3253 * This is not a mere optimization. Wrong results will be produced if
3254 * the dst alpha is used, the dst format does not have alpha, and the
3255 * previous rendering was not flushed from the swizzled to linear
3256 * buffer. For example, NonPowTwo DCT.
3258 * TODO: This should be generalized to all channels for better
3259 * performance, but only alpha causes correctness issues.
3261 * Also, force rgb/alpha func/factors match, to make AoS blending
3264 if (format_desc
->swizzle
[3] > PIPE_SWIZZLE_W
||
3265 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
3266 /* Doesn't cover mixed snorm/unorm but can't render to them anyway */
3267 boolean clamped_zero
= !util_format_is_float(format
) &&
3268 !util_format_is_snorm(format
);
3269 blend_rt
->rgb_src_factor
=
3270 force_dst_alpha_one(blend_rt
->rgb_src_factor
, clamped_zero
);
3271 blend_rt
->rgb_dst_factor
=
3272 force_dst_alpha_one(blend_rt
->rgb_dst_factor
, clamped_zero
);
3273 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
3274 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
3275 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
3279 /* no color buffer for this fragment output */
3280 key
->cbuf_format
[i
] = PIPE_FORMAT_NONE
;
3281 blend_rt
->colormask
= 0x0;
3282 blend_rt
->blend_enable
= 0;
3286 /* This value will be the same for all the variants of a given shader:
3288 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
3290 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
3291 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3292 lp_sampler_static_sampler_state(&key
->state
[i
].sampler_state
,
3293 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
3298 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
3299 * are dx10-style? Can't really have mixed opcodes, at least not
3300 * if we want to skip the holes here (without rescanning tgsi).
3302 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
3303 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
3304 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3305 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1 << i
)) {
3306 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
3307 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3312 key
->nr_sampler_views
= key
->nr_samplers
;
3313 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3314 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
3315 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
3316 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
3325 * Update fragment shader state. This is called just prior to drawing
3326 * something when some fragment-related state has changed.
3329 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
3331 struct lp_fragment_shader
*shader
= lp
->fs
;
3332 struct lp_fragment_shader_variant_key key
;
3333 struct lp_fragment_shader_variant
*variant
= NULL
;
3334 struct lp_fs_variant_list_item
*li
;
3336 make_variant_key(lp
, shader
, &key
);
3338 /* Search the variants for one which matches the key */
3339 li
= first_elem(&shader
->variants
);
3340 while(!at_end(&shader
->variants
, li
)) {
3341 if(memcmp(&li
->base
->key
, &key
, shader
->variant_key_size
) == 0) {
3349 /* Move this variant to the head of the list to implement LRU
3350 * deletion of shader's when we have too many.
3352 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3355 /* variant not found, create it now */
3358 unsigned variants_to_cull
;
3361 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
3364 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
3367 /* First, check if we've exceeded the max number of shader variants.
3368 * If so, free 25% of them (the least recently used ones).
3370 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 4 : 0;
3372 if (variants_to_cull
||
3373 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
3374 struct pipe_context
*pipe
= &lp
->pipe
;
3377 * XXX: we need to flush the context until we have some sort of
3378 * reference counting in fragment shaders as they may still be binned
3379 * Flushing alone might not be sufficient we need to wait on it too.
3381 llvmpipe_finish(pipe
, __FUNCTION__
);
3384 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
3385 * number of shader variants (potentially all of them) could be
3386 * pending for destruction on flush.
3389 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
3390 struct lp_fs_variant_list_item
*item
;
3391 if (is_empty_list(&lp
->fs_variants_list
)) {
3394 item
= last_elem(&lp
->fs_variants_list
);
3397 llvmpipe_remove_shader_variant(lp
, item
->base
);
3402 * Generate the new variant.
3405 variant
= generate_variant(lp
, shader
, &key
);
3408 LP_COUNT_ADD(llvm_compile_time
, dt
);
3409 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
3411 /* Put the new variant into the list */
3413 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
3414 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
3415 lp
->nr_fs_variants
++;
3416 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
3417 shader
->variants_cached
++;
3421 /* Bind this variant */
3422 lp_setup_set_fs_variant(lp
->setup
, variant
);
3430 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
3432 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
3433 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
3434 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
3436 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;
3440 * Rasterization is disabled if there is no pixel shader and
3441 * both depth and stencil testing are disabled:
3442 * http://msdn.microsoft.com/en-us/library/windows/desktop/bb205125
3445 llvmpipe_rasterization_disabled(struct llvmpipe_context
*lp
)
3447 boolean null_fs
= !lp
->fs
|| lp
->fs
->info
.base
.num_tokens
<= 1;
3450 !lp
->depth_stencil
->depth
.enabled
&&
3451 !lp
->depth_stencil
->stencil
[0].enabled
);