1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
37 * - depth/stencil test
40 * This file has only the glue to assemble the fragment pipeline. The actual
41 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
42 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
43 * muster the LLVM JIT execution engine to create a function that follows an
44 * established binary interface and that can be called from C directly.
46 * A big source of complexity here is that we often want to run different
47 * stages with different precisions and data types and precisions. For example,
48 * the fragment shader needs typically to be done in floats, but the
49 * depth/stencil test and blending is better done in the type that most closely
50 * matches the depth/stencil and color buffer respectively.
52 * Since the width of a SIMD vector register stays the same regardless of the
53 * element type, different types imply different number of elements, so we must
54 * code generate more instances of the stages with larger types to be able to
55 * feed/consume the stages with smaller types.
57 * @author Jose Fonseca <jfonseca@vmware.com>
61 #include "pipe/p_defines.h"
62 #include "util/u_inlines.h"
63 #include "util/u_memory.h"
64 #include "util/u_pointer.h"
65 #include "util/u_format.h"
66 #include "util/u_dump.h"
67 #include "util/u_string.h"
68 #include "util/u_simple_list.h"
69 #include "util/u_dual_blend.h"
70 #include "os/os_time.h"
71 #include "pipe/p_shader_tokens.h"
72 #include "draw/draw_context.h"
73 #include "tgsi/tgsi_dump.h"
74 #include "tgsi/tgsi_scan.h"
75 #include "tgsi/tgsi_parse.h"
76 #include "gallivm/lp_bld_type.h"
77 #include "gallivm/lp_bld_const.h"
78 #include "gallivm/lp_bld_conv.h"
79 #include "gallivm/lp_bld_init.h"
80 #include "gallivm/lp_bld_intr.h"
81 #include "gallivm/lp_bld_logic.h"
82 #include "gallivm/lp_bld_tgsi.h"
83 #include "gallivm/lp_bld_swizzle.h"
84 #include "gallivm/lp_bld_flow.h"
85 #include "gallivm/lp_bld_debug.h"
86 #include "gallivm/lp_bld_arit.h"
87 #include "gallivm/lp_bld_pack.h"
88 #include "gallivm/lp_bld_format.h"
89 #include "gallivm/lp_bld_quad.h"
91 #include "lp_bld_alpha.h"
92 #include "lp_bld_blend.h"
93 #include "lp_bld_depth.h"
94 #include "lp_bld_interp.h"
95 #include "lp_context.h"
100 #include "lp_tex_sample.h"
101 #include "lp_flush.h"
102 #include "lp_state_fs.h"
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];
134 * XXX: We'll need a different path for 16 x u8
136 assert(fs_type
.width
== 32);
137 assert(fs_type
.length
<= Elements(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
, 1 << (j
+ 0), 0);
178 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1 << (j
+ 1), 0);
179 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1 << (j
+ 4), 0);
180 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1 << (j
+ 5), 0);
182 mask
= LLVMBuildAnd(builder
, mask
, LLVMConstVector(bits
, fs_type
.length
), "");
185 * mask = mask != 0 ? ~0 : 0
187 mask
= lp_build_compare(gallivm
,
188 mask_type
, PIPE_FUNC_NOTEQUAL
,
190 lp_build_const_int_vec(gallivm
, mask_type
, 0));
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 * Generate the fragment shader, depth/stencil test, and alpha tests.
221 generate_fs_loop(struct gallivm_state
*gallivm
,
222 struct lp_fragment_shader
*shader
,
223 const struct lp_fragment_shader_variant_key
*key
,
224 LLVMBuilderRef builder
,
226 LLVMValueRef context_ptr
,
227 LLVMValueRef num_loop
,
228 struct lp_build_interp_soa_context
*interp
,
229 struct lp_build_sampler_soa
*sampler
,
230 LLVMValueRef mask_store
,
231 LLVMValueRef (*out_color
)[4],
232 LLVMValueRef depth_ptr
,
233 LLVMValueRef depth_stride
,
235 LLVMValueRef thread_data_ptr
)
237 const struct util_format_description
*zs_format_desc
= NULL
;
238 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
239 LLVMTypeRef vec_type
;
240 LLVMValueRef mask_ptr
, mask_val
;
241 LLVMValueRef consts_ptr
;
243 LLVMValueRef z_value
, s_value
;
244 LLVMValueRef z_fb
, s_fb
;
245 LLVMValueRef stencil_refs
[2];
246 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
247 struct lp_build_for_loop_state loop_state
;
248 struct lp_build_mask_context mask
;
250 * TODO: figure out if simple_shader optimization is really worthwile to
251 * keep. Disabled because it may hide some real bugs in the (depth/stencil)
252 * code since tests tend to take another codepath than real shaders.
254 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
255 shader
->info
.base
.num_inputs
< 3 &&
256 shader
->info
.base
.num_instructions
< 8) && 0;
257 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
258 util_blend_state_is_dual(&key
->blend
, 0);
264 struct lp_bld_tgsi_system_values system_values
;
266 memset(&system_values
, 0, sizeof(system_values
));
268 if (key
->depth
.enabled
||
269 key
->stencil
[0].enabled
) {
271 zs_format_desc
= util_format_description(key
->zsbuf_format
);
272 assert(zs_format_desc
);
274 if (!shader
->info
.base
.writes_z
) {
275 if (key
->alpha
.enabled
|| shader
->info
.base
.uses_kill
) {
276 /* With alpha test and kill, can do the depth test early
277 * and hopefully eliminate some quads. But need to do a
278 * special deferred depth write once the final mask value
279 * is known. This only works though if there's either no
280 * stencil test or the stencil value isn't written.
282 if (key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
283 (key
->stencil
[1].enabled
&&
284 key
->stencil
[1].writemask
)))
285 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
287 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
290 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
293 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
296 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
297 !(key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
298 (key
->stencil
[1].enabled
&&
299 key
->stencil
[1].writemask
))))
300 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
307 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
308 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
310 vec_type
= lp_build_vec_type(gallivm
, type
);
312 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
314 lp_build_for_loop_begin(&loop_state
, gallivm
,
315 lp_build_const_int32(gallivm
, 0),
318 lp_build_const_int32(gallivm
, 1));
320 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
321 &loop_state
.counter
, 1, "mask_ptr");
322 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
324 memset(outputs
, 0, sizeof outputs
);
326 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
327 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
328 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
329 lp_build_vec_type(gallivm
,
334 if (dual_source_blend
) {
335 assert(key
->nr_cbufs
<= 1);
336 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
337 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
338 lp_build_vec_type(gallivm
,
345 /* 'mask' will control execution based on quad's pixel alive/killed state */
346 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
348 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
349 lp_build_mask_check(&mask
);
351 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
);
354 if (depth_mode
& EARLY_DEPTH_TEST
) {
355 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
356 zs_format_desc
, key
->resource_1d
,
357 depth_ptr
, depth_stride
,
358 &z_fb
, &s_fb
, loop_state
.counter
);
359 lp_build_depth_stencil_test(gallivm
,
371 if (depth_mode
& EARLY_DEPTH_WRITE
) {
372 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
373 zs_format_desc
, key
->resource_1d
,
374 NULL
, NULL
, NULL
, loop_state
.counter
,
375 depth_ptr
, depth_stride
,
379 * Note mask check if stencil is enabled must be after ds write not after
380 * stencil test otherwise new stencil values may not get written if all
381 * fragments got killed by depth/stencil test.
383 if (!simple_shader
&& key
->stencil
[0].enabled
)
384 lp_build_mask_check(&mask
);
387 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
);
389 /* Build the actual shader */
390 lp_build_tgsi_soa(gallivm
, tokens
, type
, &mask
,
391 consts_ptr
, &system_values
,
393 outputs
, sampler
, &shader
->info
.base
, NULL
);
396 if (key
->alpha
.enabled
) {
397 int color0
= find_output_by_semantic(&shader
->info
.base
,
401 if (color0
!= -1 && outputs
[color0
][3]) {
402 const struct util_format_description
*cbuf_format_desc
;
403 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
404 LLVMValueRef alpha_ref_value
;
406 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
407 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
409 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
411 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
412 &mask
, alpha
, alpha_ref_value
,
413 (depth_mode
& LATE_DEPTH_TEST
) != 0);
418 if (depth_mode
& LATE_DEPTH_TEST
) {
419 int pos0
= find_output_by_semantic(&shader
->info
.base
,
420 TGSI_SEMANTIC_POSITION
,
423 if (pos0
!= -1 && outputs
[pos0
][2]) {
424 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
427 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
428 zs_format_desc
, key
->resource_1d
,
429 depth_ptr
, depth_stride
,
430 &z_fb
, &s_fb
, loop_state
.counter
);
432 lp_build_depth_stencil_test(gallivm
,
444 if (depth_mode
& LATE_DEPTH_WRITE
) {
445 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
446 zs_format_desc
, key
->resource_1d
,
447 NULL
, NULL
, NULL
, loop_state
.counter
,
448 depth_ptr
, depth_stride
,
452 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
453 (depth_mode
& LATE_DEPTH_WRITE
))
455 /* Need to apply a reduced mask to the depth write. Reload the
456 * depth value, update from zs_value with the new mask value and
459 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
460 zs_format_desc
, key
->resource_1d
,
461 &mask
, z_fb
, s_fb
, loop_state
.counter
,
462 depth_ptr
, depth_stride
,
468 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
470 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
471 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
472 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
474 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
475 if(outputs
[attrib
][chan
]) {
476 /* XXX: just initialize outputs to point at colors[] and
479 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
480 LLVMValueRef color_ptr
;
481 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
482 &loop_state
.counter
, 1, "");
483 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
484 LLVMBuildStore(builder
, out
, color_ptr
);
490 if (key
->occlusion_count
) {
491 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
492 lp_build_name(counter
, "counter");
493 lp_build_occlusion_count(gallivm
, type
,
494 lp_build_mask_value(&mask
), counter
);
497 mask_val
= lp_build_mask_end(&mask
);
498 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
499 lp_build_for_loop_end(&loop_state
);
504 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
506 * Fragment Shader outputs pixels in small 2x2 blocks
507 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
509 * However in memory pixels are stored in rows
510 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
512 * @param type fragment shader type (4x or 8x float)
513 * @param num_fs number of fs_src
514 * @param is_1d whether we're outputting to a 1d resource
515 * @param dst_channels number of output channels
516 * @param fs_src output from fragment shader
517 * @param dst pointer to store result
518 * @param pad_inline is channel padding inline or at end of row
519 * @return the number of dsts
522 generate_fs_twiddle(struct gallivm_state
*gallivm
,
525 unsigned dst_channels
,
526 LLVMValueRef fs_src
[][4],
530 LLVMValueRef src
[16];
536 unsigned pixels
= type
.length
/ 4;
537 unsigned reorder_group
;
538 unsigned src_channels
;
542 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
543 src_count
= num_fs
* src_channels
;
545 assert(pixels
== 2 || pixels
== 1);
546 assert(num_fs
* src_channels
<= Elements(src
));
549 * Transpose from SoA -> AoS
551 for (i
= 0; i
< num_fs
; ++i
) {
552 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
556 * Pick transformation options
563 if (dst_channels
== 1) {
569 } else if (dst_channels
== 2) {
573 } else if (dst_channels
> 2) {
580 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
586 * Split the src in half
589 for (i
= num_fs
; i
> 0; --i
) {
590 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
591 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
599 * Ensure pixels are in memory order
602 /* Twiddle pixels by reordering the array, e.g.:
604 * src_count = 8 -> 0 2 1 3 4 6 5 7
605 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
607 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
609 for (i
= 0; i
< src_count
; ++i
) {
610 unsigned group
= i
/ reorder_group
;
611 unsigned block
= (group
/ 4) * 4 * reorder_group
;
612 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
615 } else if (twiddle
) {
616 /* Twiddle pixels across elements of array */
617 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
620 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
624 * Moves any padding between pixels to the end
625 * e.g. RGBXRGBX -> RGBRGBXX
628 unsigned char swizzles
[16];
629 unsigned elems
= pixels
* dst_channels
;
631 for (i
= 0; i
< type
.length
; ++i
) {
633 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
635 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
638 for (i
= 0; i
< src_count
; ++i
) {
639 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
648 * Load an unswizzled block of pixels from memory
651 load_unswizzled_block(struct gallivm_state
*gallivm
,
652 LLVMValueRef base_ptr
,
654 unsigned block_width
,
655 unsigned block_height
,
657 struct lp_type dst_type
,
659 unsigned dst_alignment
)
661 LLVMBuilderRef builder
= gallivm
->builder
;
662 unsigned row_size
= dst_count
/ block_height
;
665 /* Ensure block exactly fits into dst */
666 assert((block_width
* block_height
) % dst_count
== 0);
668 for (i
= 0; i
< dst_count
; ++i
) {
669 unsigned x
= i
% row_size
;
670 unsigned y
= i
/ row_size
;
672 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
673 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
676 LLVMValueRef dst_ptr
;
678 gep
[0] = lp_build_const_int32(gallivm
, 0);
679 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
681 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
682 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
, LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
684 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
686 lp_set_load_alignment(dst
[i
], dst_alignment
);
692 * Store an unswizzled block of pixels to memory
695 store_unswizzled_block(struct gallivm_state
*gallivm
,
696 LLVMValueRef base_ptr
,
698 unsigned block_width
,
699 unsigned block_height
,
701 struct lp_type src_type
,
703 unsigned src_alignment
)
705 LLVMBuilderRef builder
= gallivm
->builder
;
706 unsigned row_size
= src_count
/ block_height
;
709 /* Ensure src exactly fits into block */
710 assert((block_width
* block_height
) % src_count
== 0);
712 for (i
= 0; i
< src_count
; ++i
) {
713 unsigned x
= i
% row_size
;
714 unsigned y
= i
/ row_size
;
716 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
717 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
720 LLVMValueRef src_ptr
;
722 gep
[0] = lp_build_const_int32(gallivm
, 0);
723 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
725 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
726 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
, LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
728 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
730 lp_set_store_alignment(src_ptr
, src_alignment
);
736 * Checks if a format description is an arithmetic format
738 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
740 static INLINE boolean
741 is_arithmetic_format(const struct util_format_description
*format_desc
)
743 boolean arith
= false;
746 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
747 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
748 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
756 * Checks if this format requires special handling due to required expansion
757 * to floats for blending, and furthermore has "natural" packed AoS -> unpacked
760 static INLINE boolean
761 format_expands_to_float_soa(const struct util_format_description
*format_desc
)
763 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
||
764 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
772 * Retrieves the type representing the memory layout for a format
774 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
777 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
778 struct lp_type
* type
)
783 if (format_expands_to_float_soa(format_desc
)) {
784 /* just make this a 32bit uint */
785 type
->floating
= false;
794 for (i
= 0; i
< 4; i
++)
795 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
799 memset(type
, 0, sizeof(struct lp_type
));
800 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
801 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
802 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
803 type
->norm
= format_desc
->channel
[chan
].normalized
;
805 if (is_arithmetic_format(format_desc
)) {
809 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
810 type
->width
+= format_desc
->channel
[i
].size
;
813 type
->width
= format_desc
->channel
[chan
].size
;
814 type
->length
= format_desc
->nr_channels
;
820 * Retrieves the type for a format which is usable in the blending code.
822 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
825 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
826 struct lp_type
* type
)
831 if (format_expands_to_float_soa(format_desc
)) {
832 /* always use ordinary floats for blending */
833 type
->floating
= true;
842 for (i
= 0; i
< 4; i
++)
843 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
847 memset(type
, 0, sizeof(struct lp_type
));
848 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
849 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
850 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
851 type
->norm
= format_desc
->channel
[chan
].normalized
;
852 type
->width
= format_desc
->channel
[chan
].size
;
853 type
->length
= format_desc
->nr_channels
;
855 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
856 if (format_desc
->channel
[i
].size
> type
->width
)
857 type
->width
= format_desc
->channel
[i
].size
;
860 if (type
->floating
) {
863 if (type
->width
<= 8) {
865 } else if (type
->width
<= 16) {
872 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
879 * Scale a normalized value from src_bits to dst_bits.
881 * The exact calculation is
883 * dst = iround(src * dst_mask / src_mask)
885 * or with integer rounding
887 * dst = src * (2*dst_mask + sign(src)*src_mask) / (2*src_mask)
891 * src_mask = (1 << src_bits) - 1
892 * dst_mask = (1 << dst_bits) - 1
894 * but we try to avoid division and multiplication through shifts.
896 static INLINE LLVMValueRef
897 scale_bits(struct gallivm_state
*gallivm
,
901 struct lp_type src_type
)
903 LLVMBuilderRef builder
= gallivm
->builder
;
904 LLVMValueRef result
= src
;
906 if (dst_bits
< src_bits
) {
907 int delta_bits
= src_bits
- dst_bits
;
909 if (delta_bits
<= dst_bits
) {
911 * Approximate the rescaling with a single shift.
913 * This gives the wrong rounding.
916 result
= LLVMBuildLShr(builder
,
918 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
923 * Try more accurate rescaling.
927 * Drop the least significant bits to make space for the multiplication.
929 * XXX: A better approach would be to use a wider integer type as intermediate. But
930 * this is enough to convert alpha from 16bits -> 2 when rendering to
931 * PIPE_FORMAT_R10G10B10A2_UNORM.
933 result
= LLVMBuildLShr(builder
,
935 lp_build_const_int_vec(gallivm
, src_type
, dst_bits
),
939 result
= LLVMBuildMul(builder
,
941 lp_build_const_int_vec(gallivm
, src_type
, (1LL << dst_bits
) - 1),
945 * Add a rounding term before the division.
947 * TODO: Handle signed integers too.
949 if (!src_type
.sign
) {
950 result
= LLVMBuildAdd(builder
,
952 lp_build_const_int_vec(gallivm
, src_type
, (1LL << (delta_bits
- 1))),
957 * Approximate the division by src_mask with a src_bits shift.
959 * Given the src has already been shifted by dst_bits, all we need
960 * to do is to shift by the difference.
963 result
= LLVMBuildLShr(builder
,
965 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
969 } else if (dst_bits
> src_bits
) {
971 int db
= dst_bits
- src_bits
;
973 /* Shift left by difference in bits */
974 result
= LLVMBuildShl(builder
,
976 lp_build_const_int_vec(gallivm
, src_type
, db
),
980 /* Enough bits in src to fill the remainder */
981 LLVMValueRef lower
= LLVMBuildLShr(builder
,
983 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
986 result
= LLVMBuildOr(builder
, result
, lower
, "");
987 } else if (db
> src_bits
) {
988 /* Need to repeatedly copy src bits to fill remainder in dst */
991 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
992 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
994 result
= LLVMBuildOr(builder
,
996 LLVMBuildLShr(builder
, result
, shuv
, ""),
1007 * Convert from memory format to blending format
1009 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1012 convert_to_blend_type(struct gallivm_state
*gallivm
,
1013 unsigned block_size
,
1014 const struct util_format_description
*src_fmt
,
1015 struct lp_type src_type
,
1016 struct lp_type dst_type
,
1017 LLVMValueRef
* src
, // and dst
1020 LLVMValueRef
*dst
= src
;
1021 LLVMBuilderRef builder
= gallivm
->builder
;
1022 struct lp_type blend_type
;
1023 struct lp_type mem_type
;
1025 unsigned pixels
= block_size
/ num_srcs
;
1029 * full custom path for packed floats and srgb formats - none of the later
1030 * functions would do anything useful, and given the lp_type representation they
1031 * can't be fixed. Should really have some SoA blend path for these kind of
1032 * formats rather than hacking them in here.
1034 if (format_expands_to_float_soa(src_fmt
)) {
1035 LLVMValueRef tmpsrc
[4];
1037 * This is pretty suboptimal for this case blending in SoA would be much
1038 * better, since conversion gets us SoA values so need to convert back.
1040 assert(src_type
.width
== 32);
1041 assert(dst_type
.floating
);
1042 assert(dst_type
.width
== 32);
1043 assert(dst_type
.length
% 4 == 0);
1044 assert(num_srcs
% 4 == 0);
1046 for (i
= 0; i
< 4; i
++) {
1049 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1050 LLVMValueRef tmpsoa
[4];
1051 LLVMValueRef tmps
= tmpsrc
[i
];
1052 if (dst_type
.length
== 8) {
1053 LLVMValueRef shuffles
[8];
1055 /* fetch was 4 values but need 8-wide output values */
1056 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1058 * for 8-wide aos transpose would give us wrong order not matching
1059 * incoming converted fs values and mask. ARGH.
1061 for (j
= 0; j
< 4; j
++) {
1062 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1063 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1065 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1066 LLVMConstVector(shuffles
, 8), "");
1068 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1069 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1072 lp_build_unpack_rgba_soa(gallivm
, src_fmt
, dst_type
, tmps
, tmpsoa
);
1074 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1079 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1080 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1082 /* Is the format arithmetic */
1083 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1084 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1086 /* Pad if necessary */
1087 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1088 for (i
= 0; i
< num_srcs
; ++i
) {
1089 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1092 src_type
.length
= dst_type
.length
;
1095 /* Special case for half-floats */
1096 if (mem_type
.width
== 16 && mem_type
.floating
) {
1097 assert(blend_type
.width
== 32 && blend_type
.floating
);
1098 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1106 src_type
.width
= blend_type
.width
* blend_type
.length
;
1107 blend_type
.length
*= pixels
;
1108 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1110 for (i
= 0; i
< num_srcs
; ++i
) {
1111 LLVMValueRef chans
[4];
1112 LLVMValueRef res
= NULL
;
1114 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1116 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1118 unsigned sa
= src_fmt
->channel
[j
].shift
;
1119 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1120 unsigned from_lsb
= j
;
1122 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1125 for (k
= 0; k
< src_fmt
->channel
[j
].size
; ++k
) {
1129 /* Extract bits from source */
1130 chans
[j
] = LLVMBuildLShr(builder
,
1132 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1135 chans
[j
] = LLVMBuildAnd(builder
,
1137 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1141 if (src_type
.norm
) {
1142 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1143 blend_type
.width
, chans
[j
], src_type
);
1146 /* Insert bits into correct position */
1147 chans
[j
] = LLVMBuildShl(builder
,
1149 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1155 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1159 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1165 * Convert from blending format to memory format
1167 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1170 convert_from_blend_type(struct gallivm_state
*gallivm
,
1171 unsigned block_size
,
1172 const struct util_format_description
*src_fmt
,
1173 struct lp_type src_type
,
1174 struct lp_type dst_type
,
1175 LLVMValueRef
* src
, // and dst
1178 LLVMValueRef
* dst
= src
;
1180 struct lp_type mem_type
;
1181 struct lp_type blend_type
;
1182 LLVMBuilderRef builder
= gallivm
->builder
;
1183 unsigned pixels
= block_size
/ num_srcs
;
1187 * full custom path for packed floats and srgb formats - none of the later
1188 * functions would do anything useful, and given the lp_type representation they
1189 * can't be fixed. Should really have some SoA blend path for these kind of
1190 * formats rather than hacking them in here.
1192 if (format_expands_to_float_soa(src_fmt
)) {
1194 * This is pretty suboptimal for this case blending in SoA would be much
1195 * better - we need to transpose the AoS values back to SoA values for
1196 * conversion/packing.
1198 assert(src_type
.floating
);
1199 assert(src_type
.width
== 32);
1200 assert(src_type
.length
% 4 == 0);
1201 assert(dst_type
.width
== 32);
1203 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1204 LLVMValueRef tmpsoa
[4], tmpdst
;
1205 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1206 /* really really need SoA here */
1208 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1209 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1212 tmpdst
= lp_build_float_to_srgb_packed(gallivm
, src_fmt
,
1216 if (src_type
.length
== 8) {
1217 LLVMValueRef tmpaos
, shuffles
[8];
1220 * for 8-wide aos transpose has given us wrong order not matching
1221 * output order. HMPF. Also need to split the output values manually.
1223 for (j
= 0; j
< 4; j
++) {
1224 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1225 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1227 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1228 LLVMConstVector(shuffles
, 8), "");
1229 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1230 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1239 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1240 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1242 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
1244 /* Special case for half-floats */
1245 if (mem_type
.width
== 16 && mem_type
.floating
) {
1246 int length
= dst_type
.length
;
1247 assert(blend_type
.width
== 32 && blend_type
.floating
);
1249 dst_type
.length
= src_type
.length
;
1251 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1253 dst_type
.length
= length
;
1257 /* Remove any padding */
1258 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
1259 src_type
.length
-= (src_type
.length
% mem_type
.length
);
1261 for (i
= 0; i
< num_srcs
; ++i
) {
1262 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
1266 /* No bit arithmetic to do */
1271 src_type
.length
= pixels
;
1272 src_type
.width
= blend_type
.length
* blend_type
.width
;
1273 dst_type
.length
= pixels
;
1275 for (i
= 0; i
< num_srcs
; ++i
) {
1276 LLVMValueRef chans
[4];
1277 LLVMValueRef res
= NULL
;
1279 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1281 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1283 unsigned sa
= src_fmt
->channel
[j
].shift
;
1284 #ifdef PIPE_ARCH_LITTLE_ENDIAN
1285 unsigned from_lsb
= j
;
1287 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1290 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
1292 for (k
= 0; k
< blend_type
.width
; ++k
) {
1297 chans
[j
] = LLVMBuildLShr(builder
,
1299 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1302 chans
[j
] = LLVMBuildAnd(builder
,
1304 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1307 /* Scale down bits */
1308 if (src_type
.norm
) {
1309 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
1310 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
1314 chans
[j
] = LLVMBuildShl(builder
,
1316 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1319 sa
+= src_fmt
->channel
[j
].size
;
1324 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1328 assert (dst_type
.width
!= 24);
1330 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
1336 * Convert alpha to same blend type as src
1339 convert_alpha(struct gallivm_state
*gallivm
,
1340 struct lp_type row_type
,
1341 struct lp_type alpha_type
,
1342 const unsigned block_size
,
1343 const unsigned block_height
,
1344 const unsigned src_count
,
1345 const unsigned dst_channels
,
1346 const bool pad_inline
,
1347 LLVMValueRef
* src_alpha
)
1349 LLVMBuilderRef builder
= gallivm
->builder
;
1351 unsigned length
= row_type
.length
;
1352 row_type
.length
= alpha_type
.length
;
1354 /* Twiddle the alpha to match pixels */
1355 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
);
1358 * TODO this should use single lp_build_conv call for
1359 * src_count == 1 && dst_channels == 1 case (dropping the concat below)
1361 for (i
= 0; i
< block_height
; ++i
) {
1362 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
1365 alpha_type
= row_type
;
1366 row_type
.length
= length
;
1368 /* If only one channel we can only need the single alpha value per pixel */
1369 if (src_count
== 1 && dst_channels
== 1) {
1371 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
, src_count
);
1373 /* If there are more srcs than rows then we need to split alpha up */
1374 if (src_count
> block_height
) {
1375 for (i
= src_count
; i
> 0; --i
) {
1376 unsigned pixels
= block_size
/ src_count
;
1377 unsigned idx
= i
- 1;
1379 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4],
1380 (idx
* pixels
) % 4, pixels
);
1384 /* If there is a src for each pixel broadcast the alpha across whole row */
1385 if (src_count
== block_size
) {
1386 for (i
= 0; i
< src_count
; ++i
) {
1387 src_alpha
[i
] = lp_build_broadcast(gallivm
, lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
1390 unsigned pixels
= block_size
/ src_count
;
1391 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
1392 unsigned alpha_span
= 1;
1393 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
1395 /* Check if we need 2 src_alphas for our shuffles */
1396 if (pixels
> alpha_type
.length
) {
1400 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
1401 for (j
= 0; j
< row_type
.length
; ++j
) {
1402 if (j
< pixels
* channels
) {
1403 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
1405 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
1409 for (i
= 0; i
< src_count
; ++i
) {
1410 unsigned idx1
= i
, idx2
= i
;
1412 if (alpha_span
> 1){
1417 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
1420 LLVMConstVector(shuffles
, row_type
.length
),
1429 * Generates the blend function for unswizzled colour buffers
1430 * Also generates the read & write from colour buffer
1433 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
1435 struct lp_fragment_shader_variant
*variant
,
1436 enum pipe_format out_format
,
1437 unsigned int num_fs
,
1438 struct lp_type fs_type
,
1439 LLVMValueRef
* fs_mask
,
1440 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
1441 LLVMValueRef context_ptr
,
1442 LLVMValueRef color_ptr
,
1443 LLVMValueRef stride
,
1444 unsigned partial_mask
,
1447 const unsigned alpha_channel
= 3;
1448 const unsigned block_width
= LP_RASTER_BLOCK_SIZE
;
1449 const unsigned block_height
= LP_RASTER_BLOCK_SIZE
;
1450 const unsigned block_size
= block_width
* block_height
;
1451 const unsigned lp_integer_vector_width
= 128;
1453 LLVMBuilderRef builder
= gallivm
->builder
;
1454 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
1455 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
1456 LLVMValueRef src_alpha
[4 * 4];
1457 LLVMValueRef src1_alpha
[4 * 4];
1458 LLVMValueRef src_mask
[4 * 4];
1459 LLVMValueRef src
[4 * 4];
1460 LLVMValueRef src1
[4 * 4];
1461 LLVMValueRef dst
[4 * 4];
1462 LLVMValueRef blend_color
;
1463 LLVMValueRef blend_alpha
;
1464 LLVMValueRef i32_zero
;
1465 LLVMValueRef check_mask
;
1466 LLVMValueRef undef_src_val
;
1468 struct lp_build_mask_context mask_ctx
;
1469 struct lp_type mask_type
;
1470 struct lp_type blend_type
;
1471 struct lp_type row_type
;
1472 struct lp_type dst_type
;
1474 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
1475 unsigned vector_width
;
1476 unsigned src_channels
= TGSI_NUM_CHANNELS
;
1477 unsigned dst_channels
;
1482 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
1484 unsigned dst_alignment
;
1486 bool pad_inline
= is_arithmetic_format(out_format_desc
);
1487 bool has_alpha
= false;
1488 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
1489 util_blend_state_is_dual(&variant
->key
.blend
, 0);
1491 const boolean is_1d
= variant
->key
.resource_1d
;
1492 unsigned num_fullblock_fs
= is_1d
? 2 * num_fs
: num_fs
;
1494 mask_type
= lp_int32_vec4_type();
1495 mask_type
.length
= fs_type
.length
;
1497 for (i
= num_fs
; i
< num_fullblock_fs
; i
++) {
1498 fs_mask
[i
] = lp_build_zero(gallivm
, mask_type
);
1501 /* Do not bother executing code when mask is empty.. */
1503 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
1505 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1506 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
1509 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
1510 lp_build_mask_check(&mask_ctx
);
1513 partial_mask
|= !variant
->opaque
;
1514 i32_zero
= lp_build_const_int32(gallivm
, 0);
1516 #if HAVE_LLVM < 0x0302
1518 * undef triggers a crash in LLVMBuildTrunc in convert_from_blend_type in some
1519 * cases (seen with r10g10b10a2, 128bit wide vectors) (only used for 1d case).
1521 undef_src_val
= lp_build_zero(gallivm
, fs_type
);
1523 undef_src_val
= lp_build_undef(gallivm
, fs_type
);
1527 /* Get type from output format */
1528 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
1529 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
1531 row_type
.length
= fs_type
.length
;
1532 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
1534 /* Compute correct swizzle and count channels */
1535 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
1538 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
1539 /* Ensure channel is used */
1540 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
1544 /* Ensure not already written to (happens in case with GL_ALPHA) */
1545 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
1549 /* Ensure we havn't already found all channels */
1550 if (dst_channels
>= out_format_desc
->nr_channels
) {
1554 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
1557 if (i
== alpha_channel
) {
1562 if (format_expands_to_float_soa(out_format_desc
)) {
1564 * the code above can't work for layout_other
1565 * for srgb it would sort of work but we short-circuit swizzles, etc.
1566 * as that is done as part of unpack / pack.
1568 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
1574 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
1577 /* If 3 channels then pad to include alpha for 4 element transpose */
1578 if (dst_channels
== 3 && !has_alpha
) {
1579 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
1580 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
1583 if (out_format_desc
->nr_channels
== 4) {
1589 * Load shader output
1591 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1592 /* Always load alpha for use in blending */
1595 alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
1598 alpha
= undef_src_val
;
1601 /* Load each channel */
1602 for (j
= 0; j
< dst_channels
; ++j
) {
1603 assert(swizzle
[j
] < 4);
1605 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
1608 fs_src
[i
][j
] = undef_src_val
;
1612 /* If 3 channels then pad to include alpha for 4 element transpose */
1614 * XXX If we include that here maybe could actually use it instead of
1615 * separate alpha for blending?
1617 if (dst_channels
== 3 && !has_alpha
) {
1618 fs_src
[i
][3] = alpha
;
1621 /* We split the row_mask and row_alpha as we want 128bit interleave */
1622 if (fs_type
.length
== 8) {
1623 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
], 0, src_channels
);
1624 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
], src_channels
, src_channels
);
1626 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1627 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
, src_channels
, src_channels
);
1629 src_mask
[i
] = fs_mask
[i
];
1630 src_alpha
[i
] = alpha
;
1633 if (dual_source_blend
) {
1634 /* same as above except different src/dst, skip masks and comments... */
1635 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1638 alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
1641 alpha
= undef_src_val
;
1644 for (j
= 0; j
< dst_channels
; ++j
) {
1645 assert(swizzle
[j
] < 4);
1647 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
1650 fs_src1
[i
][j
] = undef_src_val
;
1653 if (dst_channels
== 3 && !has_alpha
) {
1654 fs_src1
[i
][3] = alpha
;
1656 if (fs_type
.length
== 8) {
1657 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
1658 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
, src_channels
, src_channels
);
1660 src1_alpha
[i
] = alpha
;
1665 if (util_format_is_pure_integer(out_format
)) {
1667 * In this case fs_type was really ints or uints disguised as floats,
1670 fs_type
.floating
= 0;
1671 fs_type
.sign
= dst_type
.sign
;
1672 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
1673 for (j
= 0; j
< dst_channels
; ++j
) {
1674 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
1675 lp_build_vec_type(gallivm
, fs_type
), "");
1677 if (dst_channels
== 3 && !has_alpha
) {
1678 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
1679 lp_build_vec_type(gallivm
, fs_type
), "");
1685 * Pixel twiddle from fragment shader order to memory order
1687 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
,
1688 dst_channels
, fs_src
, src
, pad_inline
);
1689 if (dual_source_blend
) {
1690 generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
, dst_channels
,
1691 fs_src1
, src1
, pad_inline
);
1694 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
1695 if (src_count
!= num_fullblock_fs
* src_channels
) {
1696 unsigned ds
= src_count
/ (num_fullblock_fs
* src_channels
);
1697 row_type
.length
/= ds
;
1698 fs_type
.length
= row_type
.length
;
1701 blend_type
= row_type
;
1702 mask_type
.length
= 4;
1704 /* Convert src to row_type */
1705 if (dual_source_blend
) {
1706 struct lp_type old_row_type
= row_type
;
1707 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
1708 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
1711 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
1714 /* If the rows are not an SSE vector, combine them to become SSE size! */
1715 if ((row_type
.width
* row_type
.length
) % 128) {
1716 unsigned bits
= row_type
.width
* row_type
.length
;
1719 assert(src_count
>= (vector_width
/ bits
));
1721 dst_count
= src_count
/ (vector_width
/ bits
);
1723 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
1724 if (dual_source_blend
) {
1725 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
1728 row_type
.length
*= combined
;
1729 src_count
/= combined
;
1731 bits
= row_type
.width
* row_type
.length
;
1732 assert(bits
== 128 || bits
== 256);
1737 * Blend Colour conversion
1739 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
1740 blend_color
= LLVMBuildPointerCast(builder
, blend_color
, LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
1741 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
, &i32_zero
, 1, ""), "");
1744 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
1746 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
1748 * since blending is done with floats, there was no conversion.
1749 * However, the rules according to fixed point renderbuffers still
1750 * apply, that is we must clamp inputs to 0.0/1.0.
1751 * (This would apply to separate alpha conversion too but we currently
1752 * force has_alpha to be true.)
1753 * TODO: should skip this with "fake" blend, since post-blend conversion
1754 * will clamp anyway.
1755 * TODO: could also skip this if fragment color clamping is enabled. We
1756 * don't support it natively so it gets baked into the shader however, so
1757 * can't really tell here.
1759 struct lp_build_context f32_bld
;
1760 assert(row_type
.floating
);
1761 lp_build_context_init(&f32_bld
, gallivm
, row_type
);
1762 for (i
= 0; i
< src_count
; i
++) {
1763 src
[i
] = lp_build_clamp(&f32_bld
, src
[i
], f32_bld
.zero
, f32_bld
.one
);
1765 if (dual_source_blend
) {
1766 for (i
= 0; i
< src_count
; i
++) {
1767 src1
[i
] = lp_build_clamp(&f32_bld
, src1
[i
], f32_bld
.zero
, f32_bld
.one
);
1770 /* probably can't be different than row_type but better safe than sorry... */
1771 lp_build_context_init(&f32_bld
, gallivm
, blend_type
);
1772 blend_color
= lp_build_clamp(&f32_bld
, blend_color
, f32_bld
.zero
, f32_bld
.one
);
1776 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
1778 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
1779 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
1781 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
1782 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
1784 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
1785 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
1791 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], block_height
, &src_mask
[0]);
1793 if (src_count
< block_height
) {
1794 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
1795 } else if (src_count
> block_height
) {
1796 for (i
= src_count
; i
> 0; --i
) {
1797 unsigned pixels
= block_size
/ src_count
;
1798 unsigned idx
= i
- 1;
1800 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4],
1801 (idx
* pixels
) % 4, pixels
);
1805 assert(mask_type
.width
== 32);
1807 for (i
= 0; i
< src_count
; ++i
) {
1808 unsigned pixels
= block_size
/ src_count
;
1809 unsigned pixel_width
= row_type
.width
* dst_channels
;
1811 if (pixel_width
== 24) {
1812 mask_type
.width
= 8;
1813 mask_type
.length
= vector_width
/ mask_type
.width
;
1815 mask_type
.length
= pixels
;
1816 mask_type
.width
= row_type
.width
* dst_channels
;
1818 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
], lp_build_int_vec_type(gallivm
, mask_type
), "");
1820 mask_type
.length
*= dst_channels
;
1821 mask_type
.width
/= dst_channels
;
1824 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
], lp_build_int_vec_type(gallivm
, mask_type
), "");
1825 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
1832 struct lp_type alpha_type
= fs_type
;
1833 alpha_type
.length
= 4;
1834 convert_alpha(gallivm
, row_type
, alpha_type
,
1835 block_size
, block_height
,
1836 src_count
, dst_channels
,
1837 pad_inline
, src_alpha
);
1838 if (dual_source_blend
) {
1839 convert_alpha(gallivm
, row_type
, alpha_type
,
1840 block_size
, block_height
,
1841 src_count
, dst_channels
,
1842 pad_inline
, src1_alpha
);
1848 * Load dst from memory
1850 if (src_count
< block_height
) {
1851 dst_count
= block_height
;
1853 dst_count
= src_count
;
1856 dst_type
.length
*= block_size
/ dst_count
;
1858 if (format_expands_to_float_soa(out_format_desc
)) {
1860 * we need multiple values at once for the conversion, so can as well
1861 * load them vectorized here too instead of concatenating later.
1862 * (Still need concatenation later for 8-wide vectors).
1864 dst_count
= block_height
;
1865 dst_type
.length
= block_width
;
1869 * Compute the alignment of the destination pointer in bytes
1870 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
1871 * are always aligned by MIN2(16, fetch_width) except for buffers (not
1872 * 1d tex but can't distinguish here) so need to stick with per-pixel
1873 * alignment in this case.
1876 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
1879 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
1881 /* Force power-of-two alignment by extracting only the least-significant-bit */
1882 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
1884 * Resource base and stride pointers are aligned to 16 bytes, so that's
1885 * the maximum alignment we can guarantee
1887 dst_alignment
= MIN2(16, dst_alignment
);
1890 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
1891 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
1892 for (i
= dst_count
/ 4; i
< dst_count
; i
++) {
1893 dst
[i
] = lp_build_undef(gallivm
, dst_type
);
1898 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
1899 dst
, dst_type
, dst_count
, dst_alignment
);
1904 * Convert from dst/output format to src/blending format.
1906 * This is necessary as we can only read 1 row from memory at a time,
1907 * so the minimum dst_count will ever be at this point is 4.
1909 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
1910 * this will take the 4 dsts and combine them into 1 src so we can perform blending
1911 * on all 16 pixels in that single vector at once.
1913 if (dst_count
> src_count
) {
1914 lp_build_concat_n(gallivm
, dst_type
, dst
, 4, dst
, src_count
);
1920 /* XXX this is broken for RGB8 formats -
1921 * they get expanded from 12 to 16 elements (to include alpha)
1922 * by convert_to_blend_type then reduced to 15 instead of 12
1923 * by convert_from_blend_type (a simple fix though breaks A8...).
1924 * R16G16B16 also crashes differently however something going wrong
1925 * inside llvm handling npot vector sizes seemingly.
1926 * It seems some cleanup could be done here (like skipping conversion/blend
1929 convert_to_blend_type(gallivm
, block_size
, out_format_desc
, dst_type
, row_type
, dst
, src_count
);
1932 * FIXME: Really should get logic ops / masks out of generic blend / row
1933 * format. Logic ops will definitely not work on the blend float format
1934 * used for SRGB here and I think OpenGL expects this to work as expected
1935 * (that is incoming values converted to srgb then logic op applied).
1937 for (i
= 0; i
< src_count
; ++i
) {
1938 dst
[i
] = lp_build_blend_aos(gallivm
,
1939 &variant
->key
.blend
,
1944 has_alpha
? NULL
: src_alpha
[i
],
1946 has_alpha
? NULL
: src1_alpha
[i
],
1948 partial_mask
? src_mask
[i
] : NULL
,
1950 has_alpha
? NULL
: blend_alpha
,
1952 pad_inline
? 4 : dst_channels
);
1955 convert_from_blend_type(gallivm
, block_size
, out_format_desc
, row_type
, dst_type
, dst
, src_count
);
1957 /* Split the blend rows back to memory rows */
1958 if (dst_count
> src_count
) {
1959 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
1961 if (src_count
== 1) {
1962 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
1963 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
1965 row_type
.length
/= 2;
1969 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
1970 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
1971 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
1972 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
1974 row_type
.length
/= 2;
1979 * Store blend result to memory
1982 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
1983 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
1986 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
1987 dst
, dst_type
, dst_count
, dst_alignment
);
1991 lp_build_mask_end(&mask_ctx
);
1997 * Generate the runtime callable function for the whole fragment pipeline.
1998 * Note that the function which we generate operates on a block of 16
1999 * pixels at at time. The block contains 2x2 quads. Each quad contains
2003 generate_fragment(struct llvmpipe_context
*lp
,
2004 struct lp_fragment_shader
*shader
,
2005 struct lp_fragment_shader_variant
*variant
,
2006 unsigned partial_mask
)
2008 struct gallivm_state
*gallivm
= variant
->gallivm
;
2009 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
2010 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
2011 char func_name
[256];
2012 struct lp_type fs_type
;
2013 struct lp_type blend_type
;
2014 LLVMTypeRef fs_elem_type
;
2015 LLVMTypeRef blend_vec_type
;
2016 LLVMTypeRef arg_types
[13];
2017 LLVMTypeRef func_type
;
2018 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
2019 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
2020 LLVMValueRef context_ptr
;
2023 LLVMValueRef a0_ptr
;
2024 LLVMValueRef dadx_ptr
;
2025 LLVMValueRef dady_ptr
;
2026 LLVMValueRef color_ptr_ptr
;
2027 LLVMValueRef stride_ptr
;
2028 LLVMValueRef depth_ptr
;
2029 LLVMValueRef depth_stride
;
2030 LLVMValueRef mask_input
;
2031 LLVMValueRef thread_data_ptr
;
2032 LLVMBasicBlockRef block
;
2033 LLVMBuilderRef builder
;
2034 struct lp_build_sampler_soa
*sampler
;
2035 struct lp_build_interp_soa_context interp
;
2036 LLVMValueRef fs_mask
[16 / 4];
2037 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2038 LLVMValueRef function
;
2039 LLVMValueRef facing
;
2044 boolean cbuf0_write_all
;
2045 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2046 util_blend_state_is_dual(&key
->blend
, 0);
2048 assert(lp_native_vector_width
/ 32 >= 4);
2050 /* Adjust color input interpolation according to flatshade state:
2052 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2053 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2054 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2056 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2058 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2062 /* check if writes to cbuf[0] are to be copied to all cbufs */
2063 cbuf0_write_all
= FALSE
;
2064 for (i
= 0;i
< shader
->info
.base
.num_properties
; i
++) {
2065 if (shader
->info
.base
.properties
[i
].name
==
2066 TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
) {
2067 cbuf0_write_all
= TRUE
;
2072 /* TODO: actually pick these based on the fs and color buffer
2073 * characteristics. */
2075 memset(&fs_type
, 0, sizeof fs_type
);
2076 fs_type
.floating
= TRUE
; /* floating point values */
2077 fs_type
.sign
= TRUE
; /* values are signed */
2078 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2079 fs_type
.width
= 32; /* 32-bit float */
2080 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2082 memset(&blend_type
, 0, sizeof blend_type
);
2083 blend_type
.floating
= FALSE
; /* values are integers */
2084 blend_type
.sign
= FALSE
; /* values are unsigned */
2085 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2086 blend_type
.width
= 8; /* 8-bit ubyte values */
2087 blend_type
.length
= 16; /* 16 elements per vector */
2090 * Generate the function prototype. Any change here must be reflected in
2091 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2094 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2096 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
2098 util_snprintf(func_name
, sizeof(func_name
), "fs%u_variant%u_%s",
2099 shader
->no
, variant
->no
, partial_mask
? "partial" : "whole");
2101 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
2102 arg_types
[1] = int32_type
; /* x */
2103 arg_types
[2] = int32_type
; /* y */
2104 arg_types
[3] = int32_type
; /* facing */
2105 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
2106 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
2107 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
2108 arg_types
[7] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
2109 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
2110 arg_types
[9] = int32_type
; /* mask_input */
2111 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
2112 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
2113 arg_types
[12] = int32_type
; /* depth_stride */
2115 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
2116 arg_types
, Elements(arg_types
), 0);
2118 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
2119 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
2121 variant
->function
[partial_mask
] = function
;
2123 /* XXX: need to propagate noalias down into color param now we are
2124 * passing a pointer-to-pointer?
2126 for(i
= 0; i
< Elements(arg_types
); ++i
)
2127 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
2128 LLVMAddAttribute(LLVMGetParam(function
, i
), LLVMNoAliasAttribute
);
2130 context_ptr
= LLVMGetParam(function
, 0);
2131 x
= LLVMGetParam(function
, 1);
2132 y
= LLVMGetParam(function
, 2);
2133 facing
= LLVMGetParam(function
, 3);
2134 a0_ptr
= LLVMGetParam(function
, 4);
2135 dadx_ptr
= LLVMGetParam(function
, 5);
2136 dady_ptr
= LLVMGetParam(function
, 6);
2137 color_ptr_ptr
= LLVMGetParam(function
, 7);
2138 depth_ptr
= LLVMGetParam(function
, 8);
2139 mask_input
= LLVMGetParam(function
, 9);
2140 thread_data_ptr
= LLVMGetParam(function
, 10);
2141 stride_ptr
= LLVMGetParam(function
, 11);
2142 depth_stride
= LLVMGetParam(function
, 12);
2144 lp_build_name(context_ptr
, "context");
2145 lp_build_name(x
, "x");
2146 lp_build_name(y
, "y");
2147 lp_build_name(a0_ptr
, "a0");
2148 lp_build_name(dadx_ptr
, "dadx");
2149 lp_build_name(dady_ptr
, "dady");
2150 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
2151 lp_build_name(depth_ptr
, "depth");
2152 lp_build_name(thread_data_ptr
, "thread_data");
2153 lp_build_name(mask_input
, "mask_input");
2154 lp_build_name(stride_ptr
, "stride_ptr");
2155 lp_build_name(depth_stride
, "depth_stride");
2161 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
2162 builder
= gallivm
->builder
;
2164 LLVMPositionBuilderAtEnd(builder
, block
);
2166 /* code generated texture sampling */
2167 sampler
= lp_llvm_sampler_soa_create(key
->state
, context_ptr
);
2169 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
2170 /* for 1d resources only run "upper half" of stamp */
2171 if (key
->resource_1d
)
2175 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
2176 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
2177 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
2178 num_loop
, "mask_store");
2179 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
2182 * The shader input interpolation info is not explicitely baked in the
2183 * shader key, but everything it derives from (TGSI, and flatshade) is
2184 * already included in the shader key.
2186 lp_build_interp_soa_init(&interp
,
2188 shader
->info
.base
.num_inputs
,
2190 shader
->info
.base
.pixel_center_integer
,
2192 a0_ptr
, dadx_ptr
, dady_ptr
,
2195 for (i
= 0; i
< num_fs
; i
++) {
2197 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2198 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
2199 &indexi
, 1, "mask_ptr");
2202 mask
= generate_quad_mask(gallivm
, fs_type
,
2203 i
*fs_type
.length
/4, mask_input
);
2206 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
2208 LLVMBuildStore(builder
, mask
, mask_ptr
);
2211 generate_fs_loop(gallivm
,
2219 mask_store
, /* output */
2226 for (i
= 0; i
< num_fs
; i
++) {
2227 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
2228 LLVMValueRef ptr
= LLVMBuildGEP(builder
, mask_store
,
2230 fs_mask
[i
] = LLVMBuildLoad(builder
, ptr
, "mask");
2231 /* This is fucked up need to reorganize things */
2232 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2233 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2234 ptr
= LLVMBuildGEP(builder
,
2235 color_store
[cbuf
* !cbuf0_write_all
][chan
],
2237 fs_out_color
[cbuf
][chan
][i
] = ptr
;
2240 if (dual_source_blend
) {
2241 /* only support one dual source blend target hence always use output 1 */
2242 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
2243 ptr
= LLVMBuildGEP(builder
,
2244 color_store
[1][chan
],
2246 fs_out_color
[1][chan
][i
] = ptr
;
2252 sampler
->destroy(sampler
);
2254 /* Loop over color outputs / color buffers to do blending.
2256 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
2257 LLVMValueRef color_ptr
;
2258 LLVMValueRef stride
;
2259 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
2261 boolean do_branch
= ((key
->depth
.enabled
2262 || key
->stencil
[0].enabled
2263 || key
->alpha
.enabled
)
2264 && !shader
->info
.base
.uses_kill
);
2266 color_ptr
= LLVMBuildLoad(builder
,
2267 LLVMBuildGEP(builder
, color_ptr_ptr
, &index
, 1, ""),
2270 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
2272 stride
= LLVMBuildLoad(builder
,
2273 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
2276 generate_unswizzled_blend(gallivm
, cbuf
, variant
, key
->cbuf_format
[cbuf
],
2277 num_fs
, fs_type
, fs_mask
, fs_out_color
,
2278 context_ptr
, color_ptr
, stride
, partial_mask
, do_branch
);
2281 LLVMBuildRetVoid(builder
);
2283 gallivm_verify_function(gallivm
, function
);
2285 variant
->nr_instrs
+= lp_build_count_instructions(function
);
2290 dump_fs_variant_key(const struct lp_fragment_shader_variant_key
*key
)
2294 debug_printf("fs variant %p:\n", (void *) key
);
2296 if (key
->flatshade
) {
2297 debug_printf("flatshade = 1\n");
2299 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
2300 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
2302 if (key
->depth
.enabled
) {
2303 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
2304 debug_printf("depth.func = %s\n", util_dump_func(key
->depth
.func
, TRUE
));
2305 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
2308 for (i
= 0; i
< 2; ++i
) {
2309 if (key
->stencil
[i
].enabled
) {
2310 debug_printf("stencil[%u].func = %s\n", i
, util_dump_func(key
->stencil
[i
].func
, TRUE
));
2311 debug_printf("stencil[%u].fail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
2312 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
2313 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_dump_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
2314 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
2315 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
2319 if (key
->alpha
.enabled
) {
2320 debug_printf("alpha.func = %s\n", util_dump_func(key
->alpha
.func
, TRUE
));
2323 if (key
->occlusion_count
) {
2324 debug_printf("occlusion_count = 1\n");
2327 if (key
->blend
.logicop_enable
) {
2328 debug_printf("blend.logicop_func = %s\n", util_dump_logicop(key
->blend
.logicop_func
, TRUE
));
2330 else if (key
->blend
.rt
[0].blend_enable
) {
2331 debug_printf("blend.rgb_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
2332 debug_printf("blend.rgb_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
2333 debug_printf("blend.rgb_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
2334 debug_printf("blend.alpha_func = %s\n", util_dump_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
2335 debug_printf("blend.alpha_src_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
2336 debug_printf("blend.alpha_dst_factor = %s\n", util_dump_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
2338 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
2339 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
2340 const struct lp_static_sampler_state
*sampler
= &key
->state
[i
].sampler_state
;
2341 debug_printf("sampler[%u] = \n", i
);
2342 debug_printf(" .wrap = %s %s %s\n",
2343 util_dump_tex_wrap(sampler
->wrap_s
, TRUE
),
2344 util_dump_tex_wrap(sampler
->wrap_t
, TRUE
),
2345 util_dump_tex_wrap(sampler
->wrap_r
, TRUE
));
2346 debug_printf(" .min_img_filter = %s\n",
2347 util_dump_tex_filter(sampler
->min_img_filter
, TRUE
));
2348 debug_printf(" .min_mip_filter = %s\n",
2349 util_dump_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
2350 debug_printf(" .mag_img_filter = %s\n",
2351 util_dump_tex_filter(sampler
->mag_img_filter
, TRUE
));
2352 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
2353 debug_printf(" .compare_func = %s\n", util_dump_func(sampler
->compare_func
, TRUE
));
2354 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
2355 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
2356 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
2357 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
2358 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
2360 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2361 const struct lp_static_texture_state
*texture
= &key
->state
[i
].texture_state
;
2362 debug_printf("texture[%u] = \n", i
);
2363 debug_printf(" .format = %s\n",
2364 util_format_name(texture
->format
));
2365 debug_printf(" .target = %s\n",
2366 util_dump_tex_target(texture
->target
, TRUE
));
2367 debug_printf(" .level_zero_only = %u\n",
2368 texture
->level_zero_only
);
2369 debug_printf(" .pot = %u %u %u\n",
2371 texture
->pot_height
,
2372 texture
->pot_depth
);
2378 lp_debug_fs_variant(const struct lp_fragment_shader_variant
*variant
)
2380 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
2381 variant
->shader
->no
, variant
->no
);
2382 tgsi_dump(variant
->shader
->base
.tokens
, 0);
2383 dump_fs_variant_key(&variant
->key
);
2384 debug_printf("variant->opaque = %u\n", variant
->opaque
);
2390 * Generate a new fragment shader variant from the shader code and
2391 * other state indicated by the key.
2393 static struct lp_fragment_shader_variant
*
2394 generate_variant(struct llvmpipe_context
*lp
,
2395 struct lp_fragment_shader
*shader
,
2396 const struct lp_fragment_shader_variant_key
*key
)
2398 struct lp_fragment_shader_variant
*variant
;
2399 const struct util_format_description
*cbuf0_format_desc
;
2400 boolean fullcolormask
;
2402 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
2406 variant
->gallivm
= gallivm_create();
2407 if (!variant
->gallivm
) {
2412 variant
->shader
= shader
;
2413 variant
->list_item_global
.base
= variant
;
2414 variant
->list_item_local
.base
= variant
;
2415 variant
->no
= shader
->variants_created
++;
2417 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
2420 * Determine whether we are touching all channels in the color buffer.
2422 fullcolormask
= FALSE
;
2423 if (key
->nr_cbufs
== 1) {
2424 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
2425 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
2429 !key
->blend
.logicop_enable
&&
2430 !key
->blend
.rt
[0].blend_enable
&&
2432 !key
->stencil
[0].enabled
&&
2433 !key
->alpha
.enabled
&&
2434 !key
->depth
.enabled
&&
2435 !shader
->info
.base
.uses_kill
2438 if ((shader
->info
.base
.num_tokens
<= 1) &&
2439 !key
->depth
.enabled
&& !key
->stencil
[0].enabled
) {
2440 variant
->ps_inv_multiplier
= 0;
2442 variant
->ps_inv_multiplier
= 1;
2445 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
2446 lp_debug_fs_variant(variant
);
2449 lp_jit_init_types(variant
);
2451 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
2452 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
2454 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
2455 if (variant
->opaque
) {
2456 /* Specialized shader, which doesn't need to read the color buffer. */
2457 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
2462 * Compile everything
2465 gallivm_compile_module(variant
->gallivm
);
2467 if (variant
->function
[RAST_EDGE_TEST
]) {
2468 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
2469 gallivm_jit_function(variant
->gallivm
,
2470 variant
->function
[RAST_EDGE_TEST
]);
2473 if (variant
->function
[RAST_WHOLE
]) {
2474 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
2475 gallivm_jit_function(variant
->gallivm
,
2476 variant
->function
[RAST_WHOLE
]);
2477 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
2478 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
2486 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
2487 const struct pipe_shader_state
*templ
)
2489 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2490 struct lp_fragment_shader
*shader
;
2492 int nr_sampler_views
;
2495 shader
= CALLOC_STRUCT(lp_fragment_shader
);
2499 shader
->no
= fs_no
++;
2500 make_empty_list(&shader
->variants
);
2502 /* get/save the summary info for this shader */
2503 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
2505 /* we need to keep a local copy of the tokens */
2506 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
2508 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
2509 if (shader
->draw_data
== NULL
) {
2510 FREE((void *) shader
->base
.tokens
);
2515 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2516 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2518 shader
->variant_key_size
= Offset(struct lp_fragment_shader_variant_key
,
2519 state
[MAX2(nr_samplers
, nr_sampler_views
)]);
2521 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2522 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
2523 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
2525 switch (shader
->info
.base
.input_interpolate
[i
]) {
2526 case TGSI_INTERPOLATE_CONSTANT
:
2527 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2529 case TGSI_INTERPOLATE_LINEAR
:
2530 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
2532 case TGSI_INTERPOLATE_PERSPECTIVE
:
2533 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2535 case TGSI_INTERPOLATE_COLOR
:
2536 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
2543 switch (shader
->info
.base
.input_semantic_name
[i
]) {
2544 case TGSI_SEMANTIC_FACE
:
2545 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
2547 case TGSI_SEMANTIC_POSITION
:
2548 /* Position was already emitted above
2550 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
2551 shader
->inputs
[i
].src_index
= 0;
2555 shader
->inputs
[i
].src_index
= i
+1;
2558 if (LP_DEBUG
& DEBUG_TGSI
) {
2560 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
2561 shader
->no
, (void *) shader
);
2562 tgsi_dump(templ
->tokens
, 0);
2563 debug_printf("usage masks:\n");
2564 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
2565 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
2566 debug_printf(" IN[%u].%s%s%s%s\n",
2568 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
2569 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
2570 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
2571 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
2581 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
2583 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2585 if (llvmpipe
->fs
== fs
)
2588 llvmpipe
->fs
= (struct lp_fragment_shader
*) fs
;
2590 draw_bind_fragment_shader(llvmpipe
->draw
,
2591 (llvmpipe
->fs
? llvmpipe
->fs
->draw_data
: NULL
));
2593 llvmpipe
->dirty
|= LP_NEW_FS
;
2598 * Remove shader variant from two lists: the shader's variant list
2599 * and the context's variant list.
2602 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
2603 struct lp_fragment_shader_variant
*variant
)
2607 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
2608 debug_printf("llvmpipe: del fs #%u var #%u v created #%u v cached"
2609 " #%u v total cached #%u\n",
2610 variant
->shader
->no
,
2612 variant
->shader
->variants_created
,
2613 variant
->shader
->variants_cached
,
2614 lp
->nr_fs_variants
);
2617 /* free all the variant's JIT'd functions */
2618 for (i
= 0; i
< Elements(variant
->function
); i
++) {
2619 if (variant
->function
[i
]) {
2620 gallivm_free_function(variant
->gallivm
,
2621 variant
->function
[i
],
2622 variant
->jit_function
[i
]);
2626 gallivm_destroy(variant
->gallivm
);
2628 /* remove from shader's list */
2629 remove_from_list(&variant
->list_item_local
);
2630 variant
->shader
->variants_cached
--;
2632 /* remove from context's list */
2633 remove_from_list(&variant
->list_item_global
);
2634 lp
->nr_fs_variants
--;
2635 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
2642 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
2644 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2645 struct lp_fragment_shader
*shader
= fs
;
2646 struct lp_fs_variant_list_item
*li
;
2648 assert(fs
!= llvmpipe
->fs
);
2651 * XXX: we need to flush the context until we have some sort of reference
2652 * counting in fragment shaders as they may still be binned
2653 * Flushing alone might not sufficient we need to wait on it too.
2655 llvmpipe_finish(pipe
, __FUNCTION__
);
2657 /* Delete all the variants */
2658 li
= first_elem(&shader
->variants
);
2659 while(!at_end(&shader
->variants
, li
)) {
2660 struct lp_fs_variant_list_item
*next
= next_elem(li
);
2661 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
2665 /* Delete draw module's data */
2666 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
2668 assert(shader
->variants_cached
== 0);
2669 FREE((void *) shader
->base
.tokens
);
2676 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
2677 uint shader
, uint index
,
2678 struct pipe_constant_buffer
*cb
)
2680 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
2681 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
2683 assert(shader
< PIPE_SHADER_TYPES
);
2684 assert(index
< Elements(llvmpipe
->constants
[shader
]));
2686 /* note: reference counting */
2687 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
2689 if (shader
== PIPE_SHADER_VERTEX
||
2690 shader
== PIPE_SHADER_GEOMETRY
) {
2691 /* Pass the constants to the 'draw' module */
2692 const unsigned size
= cb
? cb
->buffer_size
: 0;
2696 data
= (ubyte
*) llvmpipe_resource_data(constants
);
2698 else if (cb
&& cb
->user_buffer
) {
2699 data
= (ubyte
*) cb
->user_buffer
;
2706 data
+= cb
->buffer_offset
;
2708 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
2712 llvmpipe
->dirty
|= LP_NEW_CONSTANTS
;
2714 if (cb
&& cb
->user_buffer
) {
2715 pipe_resource_reference(&constants
, NULL
);
2721 * Return the blend factor equivalent to a destination alpha of one.
2723 static INLINE
unsigned
2724 force_dst_alpha_one(unsigned factor
, boolean clamped_zero
)
2727 case PIPE_BLENDFACTOR_DST_ALPHA
:
2728 return PIPE_BLENDFACTOR_ONE
;
2729 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
2730 return PIPE_BLENDFACTOR_ZERO
;
2731 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
2733 return PIPE_BLENDFACTOR_ZERO
;
2735 return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
;
2743 * We need to generate several variants of the fragment pipeline to match
2744 * all the combinations of the contributing state atoms.
2746 * TODO: there is actually no reason to tie this to context state -- the
2747 * generated code could be cached globally in the screen.
2750 make_variant_key(struct llvmpipe_context
*lp
,
2751 struct lp_fragment_shader
*shader
,
2752 struct lp_fragment_shader_variant_key
*key
)
2756 memset(key
, 0, shader
->variant_key_size
);
2758 if (lp
->framebuffer
.zsbuf
) {
2759 enum pipe_format zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
2760 const struct util_format_description
*zsbuf_desc
=
2761 util_format_description(zsbuf_format
);
2763 if (lp
->depth_stencil
->depth
.enabled
&&
2764 util_format_has_depth(zsbuf_desc
)) {
2765 key
->zsbuf_format
= zsbuf_format
;
2766 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
2768 if (lp
->depth_stencil
->stencil
[0].enabled
&&
2769 util_format_has_stencil(zsbuf_desc
)) {
2770 key
->zsbuf_format
= zsbuf_format
;
2771 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
2773 if (llvmpipe_resource_is_1d(lp
->framebuffer
.zsbuf
->texture
)) {
2774 key
->resource_1d
= TRUE
;
2778 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
2779 if (!lp
->framebuffer
.nr_cbufs
||
2780 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
2781 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
2783 if(key
->alpha
.enabled
)
2784 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
2785 /* alpha.ref_value is passed in jit_context */
2787 key
->flatshade
= lp
->rasterizer
->flatshade
;
2788 if (lp
->active_occlusion_queries
) {
2789 key
->occlusion_count
= TRUE
;
2792 if (lp
->framebuffer
.nr_cbufs
) {
2793 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
2796 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
2798 if (!key
->blend
.independent_blend_enable
) {
2799 /* we always need independent blend otherwise the fixups below won't work */
2800 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
2801 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
2803 key
->blend
.independent_blend_enable
= 1;
2806 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
2807 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
2808 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
2809 const struct util_format_description
*format_desc
;
2811 key
->cbuf_format
[i
] = format
;
2814 * Figure out if this is a 1d resource. Note that OpenGL allows crazy
2815 * mixing of 2d textures with height 1 and 1d textures, so make sure
2816 * we pick 1d if any cbuf or zsbuf is 1d.
2818 if (llvmpipe_resource_is_1d(lp
->framebuffer
.cbufs
[0]->texture
)) {
2819 key
->resource_1d
= TRUE
;
2822 format_desc
= util_format_description(format
);
2823 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
2824 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
2827 * Mask out color channels not present in the color buffer.
2829 blend_rt
->colormask
&= util_format_colormask(format_desc
);
2832 * Disable blend for integer formats.
2834 if (util_format_is_pure_integer(format
)) {
2835 blend_rt
->blend_enable
= 0;
2839 * Our swizzled render tiles always have an alpha channel, but the linear
2840 * render target format often does not, so force here the dst alpha to be
2843 * This is not a mere optimization. Wrong results will be produced if the
2844 * dst alpha is used, the dst format does not have alpha, and the previous
2845 * rendering was not flushed from the swizzled to linear buffer. For
2846 * example, NonPowTwo DCT.
2848 * TODO: This should be generalized to all channels for better
2849 * performance, but only alpha causes correctness issues.
2851 * Also, force rgb/alpha func/factors match, to make AoS blending easier.
2853 if (format_desc
->swizzle
[3] > UTIL_FORMAT_SWIZZLE_W
||
2854 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
2855 /* Doesn't cover mixed snorm/unorm but can't render to them anyway */
2856 boolean clamped_zero
= !util_format_is_float(format
) &&
2857 !util_format_is_snorm(format
);
2858 blend_rt
->rgb_src_factor
= force_dst_alpha_one(blend_rt
->rgb_src_factor
,
2860 blend_rt
->rgb_dst_factor
= force_dst_alpha_one(blend_rt
->rgb_dst_factor
,
2862 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
2863 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
2864 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
2868 /* This value will be the same for all the variants of a given shader:
2870 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
2872 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
2873 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
2874 lp_sampler_static_sampler_state(&key
->state
[i
].sampler_state
,
2875 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
2880 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
2881 * are dx10-style? Can't really have mixed opcodes, at least not
2882 * if we want to skip the holes here (without rescanning tgsi).
2884 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
2885 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
2886 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2887 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1 << i
)) {
2888 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
2889 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
2894 key
->nr_sampler_views
= key
->nr_samplers
;
2895 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
2896 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
2897 lp_sampler_static_texture_state(&key
->state
[i
].texture_state
,
2898 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
2907 * Update fragment shader state. This is called just prior to drawing
2908 * something when some fragment-related state has changed.
2911 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
2913 struct lp_fragment_shader
*shader
= lp
->fs
;
2914 struct lp_fragment_shader_variant_key key
;
2915 struct lp_fragment_shader_variant
*variant
= NULL
;
2916 struct lp_fs_variant_list_item
*li
;
2918 make_variant_key(lp
, shader
, &key
);
2920 /* Search the variants for one which matches the key */
2921 li
= first_elem(&shader
->variants
);
2922 while(!at_end(&shader
->variants
, li
)) {
2923 if(memcmp(&li
->base
->key
, &key
, shader
->variant_key_size
) == 0) {
2931 /* Move this variant to the head of the list to implement LRU
2932 * deletion of shader's when we have too many.
2934 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
2937 /* variant not found, create it now */
2940 unsigned variants_to_cull
;
2943 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
2946 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
2949 /* First, check if we've exceeded the max number of shader variants.
2950 * If so, free 25% of them (the least recently used ones).
2952 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 4 : 0;
2954 if (variants_to_cull
||
2955 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
2956 struct pipe_context
*pipe
= &lp
->pipe
;
2959 * XXX: we need to flush the context until we have some sort of
2960 * reference counting in fragment shaders as they may still be binned
2961 * Flushing alone might not be sufficient we need to wait on it too.
2963 llvmpipe_finish(pipe
, __FUNCTION__
);
2966 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
2967 * number of shader variants (potentially all of them) could be
2968 * pending for destruction on flush.
2971 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
2972 struct lp_fs_variant_list_item
*item
;
2973 if (is_empty_list(&lp
->fs_variants_list
)) {
2976 item
= last_elem(&lp
->fs_variants_list
);
2979 llvmpipe_remove_shader_variant(lp
, item
->base
);
2984 * Generate the new variant.
2987 variant
= generate_variant(lp
, shader
, &key
);
2990 LP_COUNT_ADD(llvm_compile_time
, dt
);
2991 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
2993 llvmpipe_variant_count
++;
2995 /* Put the new variant into the list */
2997 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
2998 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
2999 lp
->nr_fs_variants
++;
3000 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
3001 shader
->variants_cached
++;
3005 /* Bind this variant */
3006 lp_setup_set_fs_variant(lp
->setup
, variant
);
3014 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
3016 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
3017 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
3018 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
3020 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;
3024 * Rasterization is disabled if there is no pixel shader and
3025 * both depth and stencil testing are disabled:
3026 * http://msdn.microsoft.com/en-us/library/windows/desktop/bb205125
3029 llvmpipe_rasterization_disabled(struct llvmpipe_context
*lp
)
3031 boolean null_fs
= !lp
->fs
|| lp
->fs
->info
.base
.num_tokens
<= 1;
3034 !lp
->depth_stencil
->depth
.enabled
&&
3035 !lp
->depth_stencil
->stencil
[0].enabled
);