1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
37 * - depth/stencil test
40 * This file has only the glue to assemble the fragment pipeline. The actual
41 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
42 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
43 * muster the LLVM JIT execution engine to create a function that follows an
44 * established binary interface and that can be called from C directly.
46 * A big source of complexity here is that we often want to run different
47 * stages with different precisions and data types and precisions. For example,
48 * the fragment shader needs typically to be done in floats, but the
49 * depth/stencil test and blending is better done in the type that most closely
50 * matches the depth/stencil and color buffer respectively.
52 * Since the width of a SIMD vector register stays the same regardless of the
53 * element type, different types imply different number of elements, so we must
54 * code generate more instances of the stages with larger types to be able to
55 * feed/consume the stages with smaller types.
57 * @author Jose Fonseca <jfonseca@vmware.com>
61 #include "pipe/p_defines.h"
62 #include "util/u_inlines.h"
63 #include "util/u_memory.h"
64 #include "util/u_pointer.h"
65 #include "util/format/u_format.h"
66 #include "util/u_dump.h"
67 #include "util/u_string.h"
68 #include "util/simple_list.h"
69 #include "util/u_dual_blend.h"
70 #include "util/os_time.h"
71 #include "pipe/p_shader_tokens.h"
72 #include "draw/draw_context.h"
73 #include "tgsi/tgsi_dump.h"
74 #include "tgsi/tgsi_scan.h"
75 #include "tgsi/tgsi_parse.h"
76 #include "gallivm/lp_bld_type.h"
77 #include "gallivm/lp_bld_const.h"
78 #include "gallivm/lp_bld_conv.h"
79 #include "gallivm/lp_bld_init.h"
80 #include "gallivm/lp_bld_intr.h"
81 #include "gallivm/lp_bld_logic.h"
82 #include "gallivm/lp_bld_tgsi.h"
83 #include "gallivm/lp_bld_nir.h"
84 #include "gallivm/lp_bld_swizzle.h"
85 #include "gallivm/lp_bld_flow.h"
86 #include "gallivm/lp_bld_debug.h"
87 #include "gallivm/lp_bld_arit.h"
88 #include "gallivm/lp_bld_bitarit.h"
89 #include "gallivm/lp_bld_pack.h"
90 #include "gallivm/lp_bld_format.h"
91 #include "gallivm/lp_bld_quad.h"
92 #include "gallivm/lp_bld_gather.h"
94 #include "lp_bld_alpha.h"
95 #include "lp_bld_blend.h"
96 #include "lp_bld_depth.h"
97 #include "lp_bld_interp.h"
98 #include "lp_context.h"
101 #include "lp_setup.h"
102 #include "lp_state.h"
103 #include "lp_tex_sample.h"
104 #include "lp_flush.h"
105 #include "lp_state_fs.h"
107 #include "nir/nir_to_tgsi_info.h"
109 #include "lp_screen.h"
110 #include "compiler/nir/nir_serialize.h"
111 #include "util/mesa-sha1.h"
112 /** Fragment shader number (for debugging) */
113 static unsigned fs_no
= 0;
116 load_unswizzled_block(struct gallivm_state
*gallivm
,
117 LLVMValueRef base_ptr
,
119 unsigned block_width
,
120 unsigned block_height
,
122 struct lp_type dst_type
,
124 unsigned dst_alignment
,
125 LLVMValueRef x_offset
,
126 LLVMValueRef y_offset
,
127 bool fb_fetch_twiddle
);
129 * Checks if a format description is an arithmetic format
131 * A format which has irregular channel sizes such as R3_G3_B2 or R5_G6_B5.
133 static inline boolean
134 is_arithmetic_format(const struct util_format_description
*format_desc
)
136 boolean arith
= false;
139 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
140 arith
|= format_desc
->channel
[i
].size
!= format_desc
->channel
[0].size
;
141 arith
|= (format_desc
->channel
[i
].size
% 8) != 0;
148 * Checks if this format requires special handling due to required expansion
149 * to floats for blending, and furthermore has "natural" packed AoS -> unpacked
152 static inline boolean
153 format_expands_to_float_soa(const struct util_format_description
*format_desc
)
155 if (format_desc
->format
== PIPE_FORMAT_R11G11B10_FLOAT
||
156 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
164 * Retrieves the type representing the memory layout for a format
166 * e.g. RGBA16F = 4x half-float and R3G3B2 = 1x byte
169 lp_mem_type_from_format_desc(const struct util_format_description
*format_desc
,
170 struct lp_type
* type
)
175 if (format_expands_to_float_soa(format_desc
)) {
176 /* just make this a uint with width of block */
177 type
->floating
= false;
181 type
->width
= format_desc
->block
.bits
;
186 for (i
= 0; i
< 4; i
++)
187 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
191 memset(type
, 0, sizeof(struct lp_type
));
192 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
193 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
194 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
195 type
->norm
= format_desc
->channel
[chan
].normalized
;
197 if (is_arithmetic_format(format_desc
)) {
201 for (i
= 0; i
< format_desc
->nr_channels
; ++i
) {
202 type
->width
+= format_desc
->channel
[i
].size
;
205 type
->width
= format_desc
->channel
[chan
].size
;
206 type
->length
= format_desc
->nr_channels
;
211 * Expand the relevant bits of mask_input to a n*4-dword mask for the
212 * n*four pixels in n 2x2 quads. This will set the n*four elements of the
213 * quad mask vector to 0 or ~0.
214 * Grouping is 01, 23 for 2 quad mode hence only 0 and 2 are valid
215 * quad arguments with fs length 8.
217 * \param first_quad which quad(s) of the quad group to test, in [0,3]
218 * \param mask_input bitwise mask for the whole 4x4 stamp
221 generate_quad_mask(struct gallivm_state
*gallivm
,
222 struct lp_type fs_type
,
225 LLVMValueRef mask_input
) /* int64 */
227 LLVMBuilderRef builder
= gallivm
->builder
;
228 struct lp_type mask_type
;
229 LLVMTypeRef i32t
= LLVMInt32TypeInContext(gallivm
->context
);
230 LLVMValueRef bits
[16];
231 LLVMValueRef mask
, bits_vec
;
235 * XXX: We'll need a different path for 16 x u8
237 assert(fs_type
.width
== 32);
238 assert(fs_type
.length
<= ARRAY_SIZE(bits
));
239 mask_type
= lp_int_type(fs_type
);
242 * mask_input >>= (quad * 4)
244 switch (first_quad
) {
249 assert(fs_type
.length
== 4);
256 assert(fs_type
.length
== 4);
264 mask_input
= LLVMBuildLShr(builder
, mask_input
, lp_build_const_int64(gallivm
, 16 * sample
), "");
265 mask_input
= LLVMBuildTrunc(builder
, mask_input
,
267 mask_input
= LLVMBuildAnd(builder
, mask_input
, lp_build_const_int32(gallivm
, 0xffff), "");
269 mask_input
= LLVMBuildLShr(builder
,
271 LLVMConstInt(i32t
, shift
, 0),
275 * mask = { mask_input & (1 << i), for i in [0,3] }
277 mask
= lp_build_broadcast(gallivm
,
278 lp_build_vec_type(gallivm
, mask_type
),
281 for (i
= 0; i
< fs_type
.length
/ 4; i
++) {
282 unsigned j
= 2 * (i
% 2) + (i
/ 2) * 8;
283 bits
[4*i
+ 0] = LLVMConstInt(i32t
, 1ULL << (j
+ 0), 0);
284 bits
[4*i
+ 1] = LLVMConstInt(i32t
, 1ULL << (j
+ 1), 0);
285 bits
[4*i
+ 2] = LLVMConstInt(i32t
, 1ULL << (j
+ 4), 0);
286 bits
[4*i
+ 3] = LLVMConstInt(i32t
, 1ULL << (j
+ 5), 0);
288 bits_vec
= LLVMConstVector(bits
, fs_type
.length
);
289 mask
= LLVMBuildAnd(builder
, mask
, bits_vec
, "");
292 * mask = mask == bits ? ~0 : 0
294 mask
= lp_build_compare(gallivm
,
295 mask_type
, PIPE_FUNC_EQUAL
,
302 #define EARLY_DEPTH_TEST 0x1
303 #define LATE_DEPTH_TEST 0x2
304 #define EARLY_DEPTH_WRITE 0x4
305 #define LATE_DEPTH_WRITE 0x8
308 find_output_by_semantic( const struct tgsi_shader_info
*info
,
314 for (i
= 0; i
< info
->num_outputs
; i
++)
315 if (info
->output_semantic_name
[i
] == semantic
&&
316 info
->output_semantic_index
[i
] == index
)
324 * Fetch the specified lp_jit_viewport structure for a given viewport_index.
327 lp_llvm_viewport(LLVMValueRef context_ptr
,
328 struct gallivm_state
*gallivm
,
329 LLVMValueRef viewport_index
)
331 LLVMBuilderRef builder
= gallivm
->builder
;
334 struct lp_type viewport_type
=
335 lp_type_float_vec(32, 32 * LP_JIT_VIEWPORT_NUM_FIELDS
);
337 ptr
= lp_jit_context_viewports(gallivm
, context_ptr
);
338 ptr
= LLVMBuildPointerCast(builder
, ptr
,
339 LLVMPointerType(lp_build_vec_type(gallivm
, viewport_type
), 0), "");
341 res
= lp_build_pointer_get(builder
, ptr
, viewport_index
);
348 lp_build_depth_clamp(struct gallivm_state
*gallivm
,
349 LLVMBuilderRef builder
,
351 LLVMValueRef context_ptr
,
352 LLVMValueRef thread_data_ptr
,
355 LLVMValueRef viewport
, min_depth
, max_depth
;
356 LLVMValueRef viewport_index
;
357 struct lp_build_context f32_bld
;
359 assert(type
.floating
);
360 lp_build_context_init(&f32_bld
, gallivm
, type
);
363 * Assumes clamping of the viewport index will occur in setup/gs. Value
364 * is passed through the rasterization stage via lp_rast_shader_inputs.
366 * See: draw_clamp_viewport_idx and lp_clamp_viewport_idx for clamping
369 viewport_index
= lp_jit_thread_data_raster_state_viewport_index(gallivm
,
373 * Load the min and max depth from the lp_jit_context.viewports
374 * array of lp_jit_viewport structures.
376 viewport
= lp_llvm_viewport(context_ptr
, gallivm
, viewport_index
);
378 /* viewports[viewport_index].min_depth */
379 min_depth
= LLVMBuildExtractElement(builder
, viewport
,
380 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MIN_DEPTH
), "");
381 min_depth
= lp_build_broadcast_scalar(&f32_bld
, min_depth
);
383 /* viewports[viewport_index].max_depth */
384 max_depth
= LLVMBuildExtractElement(builder
, viewport
,
385 lp_build_const_int32(gallivm
, LP_JIT_VIEWPORT_MAX_DEPTH
), "");
386 max_depth
= lp_build_broadcast_scalar(&f32_bld
, max_depth
);
389 * Clamp to the min and max depth values for the given viewport.
391 return lp_build_clamp(&f32_bld
, z
, min_depth
, max_depth
);
395 lp_build_sample_alpha_to_coverage(struct gallivm_state
*gallivm
,
397 unsigned coverage_samples
,
398 LLVMValueRef num_loop
,
399 LLVMValueRef loop_counter
,
400 LLVMValueRef coverage_mask_store
,
403 struct lp_build_context bld
;
404 LLVMBuilderRef builder
= gallivm
->builder
;
405 float step
= 1.0 / coverage_samples
;
407 lp_build_context_init(&bld
, gallivm
, type
);
408 for (unsigned s
= 0; s
< coverage_samples
; s
++) {
409 LLVMValueRef alpha_ref_value
= lp_build_const_vec(gallivm
, type
, step
* s
);
410 LLVMValueRef test
= lp_build_cmp(&bld
, PIPE_FUNC_GREATER
, alpha
, alpha_ref_value
);
412 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, s
), num_loop
, "");
413 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_counter
, "");
414 LLVMValueRef s_mask_ptr
= LLVMBuildGEP(builder
, coverage_mask_store
, &s_mask_idx
, 1, "");
415 LLVMValueRef s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
416 s_mask
= LLVMBuildAnd(builder
, s_mask
, test
, "");
417 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
421 struct lp_build_fs_llvm_iface
{
422 struct lp_build_fs_iface base
;
423 struct lp_build_interp_soa_context
*interp
;
424 struct lp_build_for_loop_state
*loop_state
;
425 LLVMValueRef mask_store
;
426 LLVMValueRef sample_id
;
427 LLVMValueRef color_ptr_ptr
;
428 LLVMValueRef color_stride_ptr
;
429 LLVMValueRef color_sample_stride_ptr
;
430 const struct lp_fragment_shader_variant_key
*key
;
433 static LLVMValueRef
fs_interp(const struct lp_build_fs_iface
*iface
,
434 struct lp_build_context
*bld
,
435 unsigned attrib
, unsigned chan
,
436 bool centroid
, bool sample
,
437 LLVMValueRef attrib_indir
,
438 LLVMValueRef offsets
[2])
440 struct lp_build_fs_llvm_iface
*fs_iface
= (struct lp_build_fs_llvm_iface
*)iface
;
441 struct lp_build_interp_soa_context
*interp
= fs_iface
->interp
;
442 unsigned loc
= TGSI_INTERPOLATE_LOC_CENTER
;
444 loc
= TGSI_INTERPOLATE_LOC_CENTROID
;
446 loc
= TGSI_INTERPOLATE_LOC_SAMPLE
;
448 return lp_build_interp_soa(interp
, bld
->gallivm
, fs_iface
->loop_state
->counter
,
449 fs_iface
->mask_store
,
450 attrib
, chan
, loc
, attrib_indir
, offsets
);
453 static void fs_fb_fetch(const struct lp_build_fs_iface
*iface
,
454 struct lp_build_context
*bld
,
456 LLVMValueRef result
[4])
458 struct lp_build_fs_llvm_iface
*fs_iface
= (struct lp_build_fs_llvm_iface
*)iface
;
459 struct gallivm_state
*gallivm
= bld
->gallivm
;
460 LLVMBuilderRef builder
= gallivm
->builder
;
461 const struct lp_fragment_shader_variant_key
*key
= fs_iface
->key
;
462 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
463 LLVMValueRef color_ptr
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, fs_iface
->color_ptr_ptr
, &index
, 1, ""), "");
464 LLVMValueRef stride
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, fs_iface
->color_stride_ptr
, &index
, 1, ""), "");
466 LLVMValueRef dst
[4 * 4];
467 enum pipe_format cbuf_format
= key
->cbuf_format
[cbuf
];
468 const struct util_format_description
* out_format_desc
= util_format_description(cbuf_format
);
469 struct lp_type dst_type
;
470 unsigned block_size
= bld
->type
.length
;
471 unsigned block_height
= key
->resource_1d
? 1 : 2;
472 unsigned block_width
= block_size
/ block_height
;
474 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
476 struct lp_type blend_type
;
477 memset(&blend_type
, 0, sizeof blend_type
);
478 blend_type
.floating
= FALSE
; /* values are integers */
479 blend_type
.sign
= FALSE
; /* values are unsigned */
480 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
481 blend_type
.width
= 8; /* 8-bit ubyte values */
482 blend_type
.length
= 16; /* 16 elements per vector */
484 uint32_t dst_alignment
;
486 * Compute the alignment of the destination pointer in bytes
487 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
488 * are always aligned by MIN2(16, fetch_width) except for buffers (not
489 * 1d tex but can't distinguish here) so need to stick with per-pixel
490 * alignment in this case.
492 if (key
->resource_1d
) {
493 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
496 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
498 /* Force power-of-two alignment by extracting only the least-significant-bit */
499 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
501 * Resource base and stride pointers are aligned to 16 bytes, so that's
502 * the maximum alignment we can guarantee
504 dst_alignment
= MIN2(16, dst_alignment
);
506 LLVMTypeRef blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
507 color_ptr
= LLVMBuildBitCast(builder
, color_ptr
, LLVMPointerType(blend_vec_type
, 0), "");
509 if (key
->multisample
) {
510 LLVMValueRef sample_stride
= LLVMBuildLoad(builder
,
511 LLVMBuildGEP(builder
, fs_iface
->color_sample_stride_ptr
,
513 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_stride
, fs_iface
->sample_id
, "");
514 color_ptr
= LLVMBuildGEP(builder
, color_ptr
, &sample_offset
, 1, "");
516 /* fragment shader executes on 4x4 blocks. depending on vector width it can execute 2 or 4 iterations.
517 * only move to the next row once the top row has completed 8 wide 1 iteration, 4 wide 2 iterations */
518 LLVMValueRef x_offset
= NULL
, y_offset
= NULL
;
519 if (!key
->resource_1d
) {
520 LLVMValueRef counter
= fs_iface
->loop_state
->counter
;
522 if (block_size
== 4) {
523 x_offset
= LLVMBuildShl(builder
,
524 LLVMBuildAnd(builder
, fs_iface
->loop_state
->counter
, lp_build_const_int32(gallivm
, 1), ""),
525 lp_build_const_int32(gallivm
, 1), "");
526 counter
= LLVMBuildLShr(builder
, fs_iface
->loop_state
->counter
, lp_build_const_int32(gallivm
, 1), "");
528 y_offset
= LLVMBuildMul(builder
, counter
, lp_build_const_int32(gallivm
, 2), "");
530 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
, dst
, dst_type
, block_size
, dst_alignment
, x_offset
, y_offset
, true);
532 for (unsigned i
= 0; i
< block_size
; i
++) {
533 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
], LLVMInt32TypeInContext(gallivm
->context
), "");
535 LLVMValueRef packed
= lp_build_gather_values(gallivm
, dst
, block_size
);
537 struct lp_type texel_type
= bld
->type
;
538 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
&&
539 out_format_desc
->channel
[0].pure_integer
) {
540 if (out_format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_SIGNED
) {
541 texel_type
= lp_type_int_vec(bld
->type
.width
, bld
->type
.width
* bld
->type
.length
);
543 else if (out_format_desc
->channel
[0].type
== UTIL_FORMAT_TYPE_UNSIGNED
) {
544 texel_type
= lp_type_uint_vec(bld
->type
.width
, bld
->type
.width
* bld
->type
.length
);
547 lp_build_unpack_rgba_soa(gallivm
, out_format_desc
,
553 * Generate the fragment shader, depth/stencil test, and alpha tests.
556 generate_fs_loop(struct gallivm_state
*gallivm
,
557 struct lp_fragment_shader
*shader
,
558 const struct lp_fragment_shader_variant_key
*key
,
559 LLVMBuilderRef builder
,
561 LLVMValueRef context_ptr
,
562 LLVMValueRef sample_pos_array
,
563 LLVMValueRef num_loop
,
564 struct lp_build_interp_soa_context
*interp
,
565 const struct lp_build_sampler_soa
*sampler
,
566 const struct lp_build_image_soa
*image
,
567 LLVMValueRef mask_store
,
568 LLVMValueRef (*out_color
)[4],
569 LLVMValueRef depth_base_ptr
,
570 LLVMValueRef depth_stride
,
571 LLVMValueRef depth_sample_stride
,
572 LLVMValueRef color_ptr_ptr
,
573 LLVMValueRef color_stride_ptr
,
574 LLVMValueRef color_sample_stride_ptr
,
576 LLVMValueRef thread_data_ptr
)
578 const struct util_format_description
*zs_format_desc
= NULL
;
579 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
580 struct lp_type int_type
= lp_int_type(type
);
581 LLVMTypeRef vec_type
, int_vec_type
;
582 LLVMValueRef mask_ptr
= NULL
, mask_val
= NULL
;
583 LLVMValueRef consts_ptr
, num_consts_ptr
;
584 LLVMValueRef ssbo_ptr
, num_ssbo_ptr
;
586 LLVMValueRef z_value
, s_value
;
587 LLVMValueRef z_fb
, s_fb
;
588 LLVMValueRef depth_ptr
;
589 LLVMValueRef stencil_refs
[2];
590 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][TGSI_NUM_CHANNELS
];
591 LLVMValueRef zs_samples
= lp_build_const_int32(gallivm
, key
->zsbuf_nr_samples
);
592 struct lp_build_for_loop_state loop_state
, sample_loop_state
;
593 struct lp_build_mask_context mask
;
595 * TODO: figure out if simple_shader optimization is really worthwile to
596 * keep. Disabled because it may hide some real bugs in the (depth/stencil)
597 * code since tests tend to take another codepath than real shaders.
599 boolean simple_shader
= (shader
->info
.base
.file_count
[TGSI_FILE_SAMPLER
] == 0 &&
600 shader
->info
.base
.num_inputs
< 3 &&
601 shader
->info
.base
.num_instructions
< 8) && 0;
602 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
603 util_blend_state_is_dual(&key
->blend
, 0);
604 const bool post_depth_coverage
= shader
->info
.base
.properties
[TGSI_PROPERTY_FS_POST_DEPTH_COVERAGE
];
610 struct lp_bld_tgsi_system_values system_values
;
612 memset(&system_values
, 0, sizeof(system_values
));
614 /* truncate then sign extend. */
615 system_values
.front_facing
= LLVMBuildTrunc(gallivm
->builder
, facing
, LLVMInt1TypeInContext(gallivm
->context
), "");
616 system_values
.front_facing
= LLVMBuildSExt(gallivm
->builder
, system_values
.front_facing
, LLVMInt32TypeInContext(gallivm
->context
), "");
618 if (key
->depth
.enabled
||
619 key
->stencil
[0].enabled
) {
621 zs_format_desc
= util_format_description(key
->zsbuf_format
);
622 assert(zs_format_desc
);
624 if (shader
->info
.base
.properties
[TGSI_PROPERTY_FS_EARLY_DEPTH_STENCIL
])
625 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
626 else if (!shader
->info
.base
.writes_z
&& !shader
->info
.base
.writes_stencil
) {
627 if (shader
->info
.base
.writes_memory
)
628 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
629 else if (key
->alpha
.enabled
||
630 key
->blend
.alpha_to_coverage
||
631 shader
->info
.base
.uses_kill
||
632 shader
->info
.base
.writes_samplemask
) {
633 /* With alpha test and kill, can do the depth test early
634 * and hopefully eliminate some quads. But need to do a
635 * special deferred depth write once the final mask value
636 * is known. This only works though if there's either no
637 * stencil test or the stencil value isn't written.
639 if (key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
640 (key
->stencil
[1].enabled
&&
641 key
->stencil
[1].writemask
)))
642 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
644 depth_mode
= EARLY_DEPTH_TEST
| LATE_DEPTH_WRITE
;
647 depth_mode
= EARLY_DEPTH_TEST
| EARLY_DEPTH_WRITE
;
650 depth_mode
= LATE_DEPTH_TEST
| LATE_DEPTH_WRITE
;
653 if (!(key
->depth
.enabled
&& key
->depth
.writemask
) &&
654 !(key
->stencil
[0].enabled
&& (key
->stencil
[0].writemask
||
655 (key
->stencil
[1].enabled
&&
656 key
->stencil
[1].writemask
))))
657 depth_mode
&= ~(LATE_DEPTH_WRITE
| EARLY_DEPTH_WRITE
);
663 vec_type
= lp_build_vec_type(gallivm
, type
);
664 int_vec_type
= lp_build_vec_type(gallivm
, int_type
);
666 stencil_refs
[0] = lp_jit_context_stencil_ref_front_value(gallivm
, context_ptr
);
667 stencil_refs
[1] = lp_jit_context_stencil_ref_back_value(gallivm
, context_ptr
);
668 /* convert scalar stencil refs into vectors */
669 stencil_refs
[0] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[0]);
670 stencil_refs
[1] = lp_build_broadcast(gallivm
, int_vec_type
, stencil_refs
[1]);
672 consts_ptr
= lp_jit_context_constants(gallivm
, context_ptr
);
673 num_consts_ptr
= lp_jit_context_num_constants(gallivm
, context_ptr
);
675 ssbo_ptr
= lp_jit_context_ssbos(gallivm
, context_ptr
);
676 num_ssbo_ptr
= lp_jit_context_num_ssbos(gallivm
, context_ptr
);
678 memset(outputs
, 0, sizeof outputs
);
680 /* Allocate color storage for each fragment sample */
681 LLVMValueRef color_store_size
= num_loop
;
682 if (key
->min_samples
> 1)
683 color_store_size
= LLVMBuildMul(builder
, num_loop
, lp_build_const_int32(gallivm
, key
->min_samples
), "");
685 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
686 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
687 out_color
[cbuf
][chan
] = lp_build_array_alloca(gallivm
,
688 lp_build_vec_type(gallivm
,
690 color_store_size
, "color");
693 if (dual_source_blend
) {
694 assert(key
->nr_cbufs
<= 1);
695 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
696 out_color
[1][chan
] = lp_build_array_alloca(gallivm
,
697 lp_build_vec_type(gallivm
,
699 color_store_size
, "color1");
703 lp_build_for_loop_begin(&loop_state
, gallivm
,
704 lp_build_const_int32(gallivm
, 0),
707 lp_build_const_int32(gallivm
, 1));
709 LLVMValueRef sample_mask_in
;
710 if (key
->multisample
) {
711 sample_mask_in
= lp_build_const_int_vec(gallivm
, type
, 0);
712 /* create shader execution mask by combining all sample masks. */
713 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
714 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, num_loop
, lp_build_const_int32(gallivm
, s
), "");
715 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
716 LLVMValueRef s_mask
= lp_build_pointer_get(builder
, mask_store
, s_mask_idx
);
720 mask_val
= LLVMBuildOr(builder
, s_mask
, mask_val
, "");
722 LLVMValueRef mask_in
= LLVMBuildAnd(builder
, s_mask
, lp_build_const_int_vec(gallivm
, type
, (1 << s
)), "");
723 sample_mask_in
= LLVMBuildOr(builder
, sample_mask_in
, mask_in
, "");
726 sample_mask_in
= lp_build_const_int_vec(gallivm
, type
, 1);
727 mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
728 &loop_state
.counter
, 1, "mask_ptr");
729 mask_val
= LLVMBuildLoad(builder
, mask_ptr
, "");
731 LLVMValueRef mask_in
= LLVMBuildAnd(builder
, mask_val
, lp_build_const_int_vec(gallivm
, type
, 1), "");
732 sample_mask_in
= LLVMBuildOr(builder
, sample_mask_in
, mask_in
, "");
735 /* 'mask' will control execution based on quad's pixel alive/killed state */
736 lp_build_mask_begin(&mask
, gallivm
, type
, mask_val
);
738 if (!(depth_mode
& EARLY_DEPTH_TEST
) && !simple_shader
)
739 lp_build_mask_check(&mask
);
741 /* Create storage for recombining sample masks after early Z pass. */
742 LLVMValueRef s_mask_or
= lp_build_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
), "cov_mask_early_depth");
743 LLVMBuildStore(builder
, LLVMConstNull(lp_build_int_vec_type(gallivm
, type
)), s_mask_or
);
745 /* Create storage for post depth sample mask */
746 LLVMValueRef post_depth_sample_mask_in
= NULL
;
747 if (post_depth_coverage
)
748 post_depth_sample_mask_in
= lp_build_alloca(gallivm
, int_vec_type
, "post_depth_sample_mask_in");
750 LLVMValueRef s_mask
= NULL
, s_mask_ptr
= NULL
;
751 LLVMValueRef z_sample_value_store
= NULL
, s_sample_value_store
= NULL
;
752 LLVMValueRef z_fb_store
= NULL
, s_fb_store
= NULL
;
753 LLVMTypeRef z_type
= NULL
, z_fb_type
= NULL
;
755 /* Run early depth once per sample */
756 if (key
->multisample
) {
758 if (zs_format_desc
) {
759 struct lp_type zs_type
= lp_depth_type(zs_format_desc
, type
.length
);
760 struct lp_type z_type
= zs_type
;
761 struct lp_type s_type
= zs_type
;
762 if (zs_format_desc
->block
.bits
< type
.width
)
763 z_type
.width
= type
.width
;
764 if (zs_format_desc
->block
.bits
== 8)
765 s_type
.width
= type
.width
;
767 else if (zs_format_desc
->block
.bits
> 32) {
768 z_type
.width
= z_type
.width
/ 2;
769 s_type
.width
= s_type
.width
/ 2;
772 z_sample_value_store
= lp_build_array_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
),
773 zs_samples
, "z_sample_store");
774 s_sample_value_store
= lp_build_array_alloca(gallivm
, lp_build_int_vec_type(gallivm
, type
),
775 zs_samples
, "s_sample_store");
776 z_fb_store
= lp_build_array_alloca(gallivm
, lp_build_vec_type(gallivm
, z_type
),
777 zs_samples
, "z_fb_store");
778 s_fb_store
= lp_build_array_alloca(gallivm
, lp_build_vec_type(gallivm
, s_type
),
779 zs_samples
, "s_fb_store");
781 lp_build_for_loop_begin(&sample_loop_state
, gallivm
,
782 lp_build_const_int32(gallivm
, 0),
783 LLVMIntULT
, lp_build_const_int32(gallivm
, key
->coverage_samples
),
784 lp_build_const_int32(gallivm
, 1));
786 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, "");
787 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
788 s_mask_ptr
= LLVMBuildGEP(builder
, mask_store
, &s_mask_idx
, 1, "");
790 s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
791 s_mask
= LLVMBuildAnd(builder
, s_mask
, mask_val
, "");
795 /* for multisample Z needs to be interpolated at sample points for testing. */
796 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
, key
->multisample
? sample_loop_state
.counter
: NULL
);
799 depth_ptr
= depth_base_ptr
;
800 if (key
->multisample
) {
801 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_loop_state
.counter
, depth_sample_stride
, "");
802 depth_ptr
= LLVMBuildGEP(builder
, depth_ptr
, &sample_offset
, 1, "");
805 if (depth_mode
& EARLY_DEPTH_TEST
) {
807 * Clamp according to ARB_depth_clamp semantics.
809 if (key
->depth_clamp
) {
810 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
813 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
814 zs_format_desc
, key
->resource_1d
,
815 depth_ptr
, depth_stride
,
816 &z_fb
, &s_fb
, loop_state
.counter
);
817 lp_build_depth_stencil_test(gallivm
,
822 key
->multisample
? NULL
: &mask
,
828 !simple_shader
&& !key
->multisample
);
830 if (depth_mode
& EARLY_DEPTH_WRITE
) {
831 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
832 zs_format_desc
, key
->resource_1d
,
833 NULL
, NULL
, NULL
, loop_state
.counter
,
834 depth_ptr
, depth_stride
,
838 * Note mask check if stencil is enabled must be after ds write not after
839 * stencil test otherwise new stencil values may not get written if all
840 * fragments got killed by depth/stencil test.
842 if (!simple_shader
&& key
->stencil
[0].enabled
&& !key
->multisample
)
843 lp_build_mask_check(&mask
);
845 if (key
->multisample
) {
846 z_fb_type
= LLVMTypeOf(z_fb
);
847 z_type
= LLVMTypeOf(z_value
);
848 lp_build_pointer_set(builder
, z_sample_value_store
, sample_loop_state
.counter
, LLVMBuildBitCast(builder
, z_value
, lp_build_int_vec_type(gallivm
, type
), ""));
849 lp_build_pointer_set(builder
, s_sample_value_store
, sample_loop_state
.counter
, LLVMBuildBitCast(builder
, s_value
, lp_build_int_vec_type(gallivm
, type
), ""));
850 lp_build_pointer_set(builder
, z_fb_store
, sample_loop_state
.counter
, z_fb
);
851 lp_build_pointer_set(builder
, s_fb_store
, sample_loop_state
.counter
, s_fb
);
855 if (key
->multisample
) {
857 * Store the post-early Z coverage mask.
858 * Recombine the resulting coverage masks post early Z into the fragment
859 * shader execution mask.
861 LLVMValueRef tmp_s_mask_or
= LLVMBuildLoad(builder
, s_mask_or
, "");
862 tmp_s_mask_or
= LLVMBuildOr(builder
, tmp_s_mask_or
, s_mask
, "");
863 LLVMBuildStore(builder
, tmp_s_mask_or
, s_mask_or
);
865 if (post_depth_coverage
) {
866 LLVMValueRef mask_bit_idx
= LLVMBuildShl(builder
, lp_build_const_int32(gallivm
, 1), sample_loop_state
.counter
, "");
867 LLVMValueRef post_depth_mask_in
= LLVMBuildLoad(builder
, post_depth_sample_mask_in
, "");
868 mask_bit_idx
= LLVMBuildAnd(builder
, s_mask
, lp_build_broadcast(gallivm
, int_vec_type
, mask_bit_idx
), "");
869 post_depth_mask_in
= LLVMBuildOr(builder
, post_depth_mask_in
, mask_bit_idx
, "");
870 LLVMBuildStore(builder
, post_depth_mask_in
, post_depth_sample_mask_in
);
873 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
875 lp_build_for_loop_end(&sample_loop_state
);
877 /* recombined all the coverage masks in the shader exec mask. */
878 tmp_s_mask_or
= LLVMBuildLoad(builder
, s_mask_or
, "");
879 lp_build_mask_update(&mask
, tmp_s_mask_or
);
881 if (key
->min_samples
== 1) {
882 /* for multisample Z needs to be re interpolated at pixel center */
883 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
, NULL
);
884 lp_build_mask_update(&mask
, tmp_s_mask_or
);
887 if (post_depth_coverage
) {
888 LLVMValueRef post_depth_mask_in
= LLVMBuildAnd(builder
, lp_build_mask_value(&mask
), lp_build_const_int_vec(gallivm
, type
, 1), "");
889 LLVMBuildStore(builder
, post_depth_mask_in
, post_depth_sample_mask_in
);
893 LLVMValueRef out_sample_mask_storage
= NULL
;
894 if (shader
->info
.base
.writes_samplemask
) {
895 out_sample_mask_storage
= lp_build_alloca(gallivm
, int_vec_type
, "write_mask");
896 if (key
->min_samples
> 1)
897 LLVMBuildStore(builder
, LLVMConstNull(int_vec_type
), out_sample_mask_storage
);
900 if (post_depth_coverage
) {
901 system_values
.sample_mask_in
= LLVMBuildLoad(builder
, post_depth_sample_mask_in
, "");
904 system_values
.sample_mask_in
= sample_mask_in
;
905 if (key
->multisample
&& key
->min_samples
> 1) {
906 lp_build_for_loop_begin(&sample_loop_state
, gallivm
,
907 lp_build_const_int32(gallivm
, 0),
909 lp_build_const_int32(gallivm
, key
->min_samples
),
910 lp_build_const_int32(gallivm
, 1));
912 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, "");
913 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
914 s_mask_ptr
= LLVMBuildGEP(builder
, mask_store
, &s_mask_idx
, 1, "");
915 s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
916 lp_build_mask_force(&mask
, s_mask
);
917 lp_build_interp_soa_update_pos_dyn(interp
, gallivm
, loop_state
.counter
, sample_loop_state
.counter
);
918 system_values
.sample_id
= sample_loop_state
.counter
;
919 system_values
.sample_mask_in
= LLVMBuildAnd(builder
, system_values
.sample_mask_in
,
920 lp_build_broadcast(gallivm
, int_vec_type
,
921 LLVMBuildShl(builder
, lp_build_const_int32(gallivm
, 1), sample_loop_state
.counter
, "")), "");
923 system_values
.sample_id
= lp_build_const_int32(gallivm
, 0);
926 system_values
.sample_pos
= sample_pos_array
;
928 lp_build_interp_soa_update_inputs_dyn(interp
, gallivm
, loop_state
.counter
, mask_store
, sample_loop_state
.counter
);
930 struct lp_build_fs_llvm_iface fs_iface
= {
931 .base
.interp_fn
= fs_interp
,
932 .base
.fb_fetch
= fs_fb_fetch
,
934 .loop_state
= &loop_state
,
935 .sample_id
= system_values
.sample_id
,
936 .mask_store
= mask_store
,
937 .color_ptr_ptr
= color_ptr_ptr
,
938 .color_stride_ptr
= color_stride_ptr
,
939 .color_sample_stride_ptr
= color_sample_stride_ptr
,
943 struct lp_build_tgsi_params params
;
944 memset(¶ms
, 0, sizeof(params
));
948 params
.fs_iface
= &fs_iface
.base
;
949 params
.consts_ptr
= consts_ptr
;
950 params
.const_sizes_ptr
= num_consts_ptr
;
951 params
.system_values
= &system_values
;
952 params
.inputs
= interp
->inputs
;
953 params
.context_ptr
= context_ptr
;
954 params
.thread_data_ptr
= thread_data_ptr
;
955 params
.sampler
= sampler
;
956 params
.info
= &shader
->info
.base
;
957 params
.ssbo_ptr
= ssbo_ptr
;
958 params
.ssbo_sizes_ptr
= num_ssbo_ptr
;
959 params
.image
= image
;
961 /* Build the actual shader */
962 if (shader
->base
.type
== PIPE_SHADER_IR_TGSI
)
963 lp_build_tgsi_soa(gallivm
, tokens
, ¶ms
,
966 lp_build_nir_soa(gallivm
, shader
->base
.ir
.nir
, ¶ms
,
970 if (key
->alpha
.enabled
) {
971 int color0
= find_output_by_semantic(&shader
->info
.base
,
975 if (color0
!= -1 && outputs
[color0
][3]) {
976 const struct util_format_description
*cbuf_format_desc
;
977 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
978 LLVMValueRef alpha_ref_value
;
980 alpha_ref_value
= lp_jit_context_alpha_ref_value(gallivm
, context_ptr
);
981 alpha_ref_value
= lp_build_broadcast(gallivm
, vec_type
, alpha_ref_value
);
983 cbuf_format_desc
= util_format_description(key
->cbuf_format
[0]);
985 lp_build_alpha_test(gallivm
, key
->alpha
.func
, type
, cbuf_format_desc
,
986 &mask
, alpha
, alpha_ref_value
,
987 (depth_mode
& LATE_DEPTH_TEST
) != 0);
991 /* Emulate Alpha to Coverage with Alpha test */
992 if (key
->blend
.alpha_to_coverage
) {
993 int color0
= find_output_by_semantic(&shader
->info
.base
,
997 if (color0
!= -1 && outputs
[color0
][3]) {
998 LLVMValueRef alpha
= LLVMBuildLoad(builder
, outputs
[color0
][3], "alpha");
1000 if (!key
->multisample
) {
1001 lp_build_alpha_to_coverage(gallivm
, type
,
1003 (depth_mode
& LATE_DEPTH_TEST
) != 0);
1005 lp_build_sample_alpha_to_coverage(gallivm
, type
, key
->coverage_samples
, num_loop
,
1011 if (key
->blend
.alpha_to_one
&& key
->multisample
) {
1012 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
) {
1013 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
1014 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
1015 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
1016 if (outputs
[cbuf
][3]) {
1017 LLVMBuildStore(builder
, lp_build_const_vec(gallivm
, type
, 1.0), outputs
[cbuf
][3]);
1021 if (shader
->info
.base
.writes_samplemask
) {
1022 LLVMValueRef output_smask
= NULL
;
1023 int smaski
= find_output_by_semantic(&shader
->info
.base
,
1024 TGSI_SEMANTIC_SAMPLEMASK
,
1026 struct lp_build_context smask_bld
;
1027 lp_build_context_init(&smask_bld
, gallivm
, int_type
);
1029 assert(smaski
>= 0);
1030 output_smask
= LLVMBuildLoad(builder
, outputs
[smaski
][0], "smask");
1031 output_smask
= LLVMBuildBitCast(builder
, output_smask
, smask_bld
.vec_type
, "");
1033 if (key
->min_samples
> 1) {
1034 /* only the bit corresponding to this sample is to be used. */
1035 LLVMValueRef tmp_mask
= LLVMBuildLoad(builder
, out_sample_mask_storage
, "tmp_mask");
1036 LLVMValueRef out_smask_idx
= LLVMBuildShl(builder
, lp_build_const_int32(gallivm
, 1), sample_loop_state
.counter
, "");
1037 LLVMValueRef smask_bit
= LLVMBuildAnd(builder
, output_smask
, lp_build_broadcast(gallivm
, int_vec_type
, out_smask_idx
), "");
1038 output_smask
= LLVMBuildOr(builder
, tmp_mask
, smask_bit
, "");
1041 LLVMBuildStore(builder
, output_smask
, out_sample_mask_storage
);
1044 /* Color write - per fragment sample */
1045 for (attrib
= 0; attrib
< shader
->info
.base
.num_outputs
; ++attrib
)
1047 unsigned cbuf
= shader
->info
.base
.output_semantic_index
[attrib
];
1048 if ((shader
->info
.base
.output_semantic_name
[attrib
] == TGSI_SEMANTIC_COLOR
) &&
1049 ((cbuf
< key
->nr_cbufs
) || (cbuf
== 1 && dual_source_blend
)))
1051 for(chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
1052 if(outputs
[attrib
][chan
]) {
1053 /* XXX: just initialize outputs to point at colors[] and
1056 LLVMValueRef out
= LLVMBuildLoad(builder
, outputs
[attrib
][chan
], "");
1057 LLVMValueRef color_ptr
;
1058 LLVMValueRef color_idx
= loop_state
.counter
;
1059 if (key
->min_samples
> 1)
1060 color_idx
= LLVMBuildAdd(builder
, color_idx
,
1061 LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, ""), "");
1062 color_ptr
= LLVMBuildGEP(builder
, out_color
[cbuf
][chan
],
1064 lp_build_name(out
, "color%u.%c", attrib
, "rgba"[chan
]);
1065 LLVMBuildStore(builder
, out
, color_ptr
);
1071 if (key
->multisample
&& key
->min_samples
> 1) {
1072 LLVMBuildStore(builder
, lp_build_mask_value(&mask
), s_mask_ptr
);
1073 lp_build_for_loop_end(&sample_loop_state
);
1076 if (key
->multisample
) {
1077 /* execute depth test for each sample */
1078 lp_build_for_loop_begin(&sample_loop_state
, gallivm
,
1079 lp_build_const_int32(gallivm
, 0),
1080 LLVMIntULT
, lp_build_const_int32(gallivm
, key
->coverage_samples
),
1081 lp_build_const_int32(gallivm
, 1));
1083 /* load the per-sample coverage mask */
1084 LLVMValueRef s_mask_idx
= LLVMBuildMul(builder
, sample_loop_state
.counter
, num_loop
, "");
1085 s_mask_idx
= LLVMBuildAdd(builder
, s_mask_idx
, loop_state
.counter
, "");
1086 s_mask_ptr
= LLVMBuildGEP(builder
, mask_store
, &s_mask_idx
, 1, "");
1088 /* combine the execution mask post fragment shader with the coverage mask. */
1089 s_mask
= LLVMBuildLoad(builder
, s_mask_ptr
, "");
1090 if (key
->min_samples
== 1)
1091 s_mask
= LLVMBuildAnd(builder
, s_mask
, lp_build_mask_value(&mask
), "");
1093 /* if the shader writes sample mask use that */
1094 if (shader
->info
.base
.writes_samplemask
) {
1095 LLVMValueRef out_smask_idx
= LLVMBuildShl(builder
, lp_build_const_int32(gallivm
, 1), sample_loop_state
.counter
, "");
1096 out_smask_idx
= lp_build_broadcast(gallivm
, int_vec_type
, out_smask_idx
);
1097 LLVMValueRef output_smask
= LLVMBuildLoad(builder
, out_sample_mask_storage
, "");
1098 LLVMValueRef smask_bit
= LLVMBuildAnd(builder
, output_smask
, out_smask_idx
, "");
1099 LLVMValueRef cmp
= LLVMBuildICmp(builder
, LLVMIntNE
, smask_bit
, lp_build_const_int_vec(gallivm
, int_type
, 0), "");
1100 smask_bit
= LLVMBuildSExt(builder
, cmp
, int_vec_type
, "");
1102 s_mask
= LLVMBuildAnd(builder
, s_mask
, smask_bit
, "");
1106 depth_ptr
= depth_base_ptr
;
1107 if (key
->multisample
) {
1108 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_loop_state
.counter
, depth_sample_stride
, "");
1109 depth_ptr
= LLVMBuildGEP(builder
, depth_ptr
, &sample_offset
, 1, "");
1113 if (depth_mode
& LATE_DEPTH_TEST
) {
1114 int pos0
= find_output_by_semantic(&shader
->info
.base
,
1115 TGSI_SEMANTIC_POSITION
,
1117 int s_out
= find_output_by_semantic(&shader
->info
.base
,
1118 TGSI_SEMANTIC_STENCIL
,
1120 if (pos0
!= -1 && outputs
[pos0
][2]) {
1121 z
= LLVMBuildLoad(builder
, outputs
[pos0
][2], "output.z");
1124 * Clamp according to ARB_depth_clamp semantics.
1126 if (key
->depth_clamp
) {
1127 z
= lp_build_depth_clamp(gallivm
, builder
, type
, context_ptr
,
1128 thread_data_ptr
, z
);
1131 if (s_out
!= -1 && outputs
[s_out
][1]) {
1132 /* there's only one value, and spec says to discard additional bits */
1133 LLVMValueRef s_max_mask
= lp_build_const_int_vec(gallivm
, int_type
, 255);
1134 stencil_refs
[0] = LLVMBuildLoad(builder
, outputs
[s_out
][1], "output.s");
1135 stencil_refs
[0] = LLVMBuildBitCast(builder
, stencil_refs
[0], int_vec_type
, "");
1136 stencil_refs
[0] = LLVMBuildAnd(builder
, stencil_refs
[0], s_max_mask
, "");
1137 stencil_refs
[1] = stencil_refs
[0];
1140 lp_build_depth_stencil_load_swizzled(gallivm
, type
,
1141 zs_format_desc
, key
->resource_1d
,
1142 depth_ptr
, depth_stride
,
1143 &z_fb
, &s_fb
, loop_state
.counter
);
1145 lp_build_depth_stencil_test(gallivm
,
1150 key
->multisample
? NULL
: &mask
,
1158 if (depth_mode
& LATE_DEPTH_WRITE
) {
1159 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
1160 zs_format_desc
, key
->resource_1d
,
1161 NULL
, NULL
, NULL
, loop_state
.counter
,
1162 depth_ptr
, depth_stride
,
1166 else if ((depth_mode
& EARLY_DEPTH_TEST
) &&
1167 (depth_mode
& LATE_DEPTH_WRITE
))
1169 /* Need to apply a reduced mask to the depth write. Reload the
1170 * depth value, update from zs_value with the new mask value and
1173 if (key
->multisample
) {
1174 z_value
= LLVMBuildBitCast(builder
, lp_build_pointer_get(builder
, z_sample_value_store
, sample_loop_state
.counter
), z_type
, "");;
1175 s_value
= lp_build_pointer_get(builder
, s_sample_value_store
, sample_loop_state
.counter
);
1176 z_fb
= LLVMBuildBitCast(builder
, lp_build_pointer_get(builder
, z_fb_store
, sample_loop_state
.counter
), z_fb_type
, "");
1177 s_fb
= lp_build_pointer_get(builder
, s_fb_store
, sample_loop_state
.counter
);
1179 lp_build_depth_stencil_write_swizzled(gallivm
, type
,
1180 zs_format_desc
, key
->resource_1d
,
1181 key
->multisample
? s_mask
: lp_build_mask_value(&mask
), z_fb
, s_fb
, loop_state
.counter
,
1182 depth_ptr
, depth_stride
,
1186 if (key
->occlusion_count
) {
1187 LLVMValueRef counter
= lp_jit_thread_data_counter(gallivm
, thread_data_ptr
);
1188 lp_build_name(counter
, "counter");
1190 lp_build_occlusion_count(gallivm
, type
,
1191 key
->multisample
? s_mask
: lp_build_mask_value(&mask
), counter
);
1194 if (key
->multisample
) {
1195 /* store the sample mask for this loop */
1196 LLVMBuildStore(builder
, s_mask
, s_mask_ptr
);
1197 lp_build_for_loop_end(&sample_loop_state
);
1200 mask_val
= lp_build_mask_end(&mask
);
1201 if (!key
->multisample
)
1202 LLVMBuildStore(builder
, mask_val
, mask_ptr
);
1203 lp_build_for_loop_end(&loop_state
);
1208 * This function will reorder pixels from the fragment shader SoA to memory layout AoS
1210 * Fragment Shader outputs pixels in small 2x2 blocks
1211 * e.g. (0, 0), (1, 0), (0, 1), (1, 1) ; (2, 0) ...
1213 * However in memory pixels are stored in rows
1214 * e.g. (0, 0), (1, 0), (2, 0), (3, 0) ; (0, 1) ...
1216 * @param type fragment shader type (4x or 8x float)
1217 * @param num_fs number of fs_src
1218 * @param is_1d whether we're outputting to a 1d resource
1219 * @param dst_channels number of output channels
1220 * @param fs_src output from fragment shader
1221 * @param dst pointer to store result
1222 * @param pad_inline is channel padding inline or at end of row
1223 * @return the number of dsts
1226 generate_fs_twiddle(struct gallivm_state
*gallivm
,
1227 struct lp_type type
,
1229 unsigned dst_channels
,
1230 LLVMValueRef fs_src
[][4],
1234 LLVMValueRef src
[16];
1240 unsigned pixels
= type
.length
/ 4;
1241 unsigned reorder_group
;
1242 unsigned src_channels
;
1246 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
1247 src_count
= num_fs
* src_channels
;
1249 assert(pixels
== 2 || pixels
== 1);
1250 assert(num_fs
* src_channels
<= ARRAY_SIZE(src
));
1253 * Transpose from SoA -> AoS
1255 for (i
= 0; i
< num_fs
; ++i
) {
1256 lp_build_transpose_aos_n(gallivm
, type
, &fs_src
[i
][0], src_channels
, &src
[i
* src_channels
]);
1260 * Pick transformation options
1262 swizzle_pad
= false;
1267 if (dst_channels
== 1) {
1273 } else if (dst_channels
== 2) {
1277 } else if (dst_channels
> 2) {
1284 if (!pad_inline
&& dst_channels
== 3 && pixels
> 1) {
1290 * Split the src in half
1293 for (i
= num_fs
; i
> 0; --i
) {
1294 src
[(i
- 1)*2 + 1] = lp_build_extract_range(gallivm
, src
[i
- 1], 4, 4);
1295 src
[(i
- 1)*2 + 0] = lp_build_extract_range(gallivm
, src
[i
- 1], 0, 4);
1303 * Ensure pixels are in memory order
1305 if (reorder_group
) {
1306 /* Twiddle pixels by reordering the array, e.g.:
1308 * src_count = 8 -> 0 2 1 3 4 6 5 7
1309 * src_count = 16 -> 0 1 4 5 2 3 6 7 8 9 12 13 10 11 14 15
1311 const unsigned reorder_sw
[] = { 0, 2, 1, 3 };
1313 for (i
= 0; i
< src_count
; ++i
) {
1314 unsigned group
= i
/ reorder_group
;
1315 unsigned block
= (group
/ 4) * 4 * reorder_group
;
1316 unsigned j
= block
+ (reorder_sw
[group
% 4] * reorder_group
) + (i
% reorder_group
);
1319 } else if (twiddle
) {
1320 /* Twiddle pixels across elements of array */
1322 * XXX: we should avoid this in some cases, but would need to tell
1323 * lp_build_conv to reorder (or deal with it ourselves).
1325 lp_bld_quad_twiddle(gallivm
, type
, src
, src_count
, dst
);
1328 memcpy(dst
, src
, sizeof(LLVMValueRef
) * src_count
);
1332 * Moves any padding between pixels to the end
1333 * e.g. RGBXRGBX -> RGBRGBXX
1336 unsigned char swizzles
[16];
1337 unsigned elems
= pixels
* dst_channels
;
1339 for (i
= 0; i
< type
.length
; ++i
) {
1341 swizzles
[i
] = i
% dst_channels
+ (i
/ dst_channels
) * 4;
1343 swizzles
[i
] = LP_BLD_SWIZZLE_DONTCARE
;
1346 for (i
= 0; i
< src_count
; ++i
) {
1347 dst
[i
] = lp_build_swizzle_aos_n(gallivm
, dst
[i
], swizzles
, type
.length
, type
.length
);
1356 * Untwiddle and transpose, much like the above.
1357 * However, this is after conversion, so we get packed vectors.
1358 * At this time only handle 4x16i8 rgba / 2x16i8 rg / 1x16i8 r data,
1359 * the vectors will look like:
1360 * r0r1r4r5r2r3r6r7r8r9r12... (albeit color channels may
1361 * be swizzled here). Extending to 16bit should be trivial.
1362 * Should also be extended to handle twice wide vectors with AVX2...
1365 fs_twiddle_transpose(struct gallivm_state
*gallivm
,
1366 struct lp_type type
,
1372 struct lp_type type64
, type16
, type32
;
1373 LLVMTypeRef type64_t
, type8_t
, type16_t
, type32_t
;
1374 LLVMBuilderRef builder
= gallivm
->builder
;
1375 LLVMValueRef tmp
[4], shuf
[8];
1376 for (j
= 0; j
< 2; j
++) {
1377 shuf
[j
*4 + 0] = lp_build_const_int32(gallivm
, j
*4 + 0);
1378 shuf
[j
*4 + 1] = lp_build_const_int32(gallivm
, j
*4 + 2);
1379 shuf
[j
*4 + 2] = lp_build_const_int32(gallivm
, j
*4 + 1);
1380 shuf
[j
*4 + 3] = lp_build_const_int32(gallivm
, j
*4 + 3);
1383 assert(src_count
== 4 || src_count
== 2 || src_count
== 1);
1384 assert(type
.width
== 8);
1385 assert(type
.length
== 16);
1387 type8_t
= lp_build_vec_type(gallivm
, type
);
1392 type64_t
= lp_build_vec_type(gallivm
, type64
);
1397 type16_t
= lp_build_vec_type(gallivm
, type16
);
1402 type32_t
= lp_build_vec_type(gallivm
, type32
);
1404 lp_build_transpose_aos_n(gallivm
, type
, src
, src_count
, tmp
);
1406 if (src_count
== 1) {
1407 /* transpose was no-op, just untwiddle */
1408 LLVMValueRef shuf_vec
;
1409 shuf_vec
= LLVMConstVector(shuf
, 8);
1410 tmp
[0] = LLVMBuildBitCast(builder
, src
[0], type16_t
, "");
1411 tmp
[0] = LLVMBuildShuffleVector(builder
, tmp
[0], tmp
[0], shuf_vec
, "");
1412 dst
[0] = LLVMBuildBitCast(builder
, tmp
[0], type8_t
, "");
1413 } else if (src_count
== 2) {
1414 LLVMValueRef shuf_vec
;
1415 shuf_vec
= LLVMConstVector(shuf
, 4);
1417 for (i
= 0; i
< 2; i
++) {
1418 tmp
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type32_t
, "");
1419 tmp
[i
] = LLVMBuildShuffleVector(builder
, tmp
[i
], tmp
[i
], shuf_vec
, "");
1420 dst
[i
] = LLVMBuildBitCast(builder
, tmp
[i
], type8_t
, "");
1423 for (j
= 0; j
< 2; j
++) {
1424 LLVMValueRef lo
, hi
, lo2
, hi2
;
1426 * Note that if we only really have 3 valid channels (rgb)
1427 * and we don't need alpha we could substitute a undef here
1428 * for the respective channel (causing llvm to drop conversion
1431 /* we now have rgba0rgba1rgba4rgba5 etc, untwiddle */
1432 lo2
= LLVMBuildBitCast(builder
, tmp
[j
*2], type64_t
, "");
1433 hi2
= LLVMBuildBitCast(builder
, tmp
[j
*2 + 1], type64_t
, "");
1434 lo
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 0);
1435 hi
= lp_build_interleave2(gallivm
, type64
, lo2
, hi2
, 1);
1436 dst
[j
*2] = LLVMBuildBitCast(builder
, lo
, type8_t
, "");
1437 dst
[j
*2 + 1] = LLVMBuildBitCast(builder
, hi
, type8_t
, "");
1444 * Load an unswizzled block of pixels from memory
1447 load_unswizzled_block(struct gallivm_state
*gallivm
,
1448 LLVMValueRef base_ptr
,
1449 LLVMValueRef stride
,
1450 unsigned block_width
,
1451 unsigned block_height
,
1453 struct lp_type dst_type
,
1455 unsigned dst_alignment
,
1456 LLVMValueRef x_offset
,
1457 LLVMValueRef y_offset
,
1458 bool fb_fetch_twiddle
)
1460 LLVMBuilderRef builder
= gallivm
->builder
;
1461 unsigned row_size
= dst_count
/ block_height
;
1464 /* Ensure block exactly fits into dst */
1465 assert((block_width
* block_height
) % dst_count
== 0);
1467 for (i
= 0; i
< dst_count
; ++i
) {
1468 unsigned x
= i
% row_size
;
1469 unsigned y
= i
/ row_size
;
1471 if (block_height
== 2 && dst_count
== 8 && fb_fetch_twiddle
) {
1472 /* remap the raw slots into the fragment shader execution mode. */
1473 /* this math took me way too long to work out, I'm sure it's overkill. */
1474 x
= (i
& 1) + ((i
>> 2) << 1);
1480 x_val
= lp_build_const_int32(gallivm
, x
);
1482 x_val
= LLVMBuildAdd(builder
, x_val
, x_offset
, "");
1483 x_val
= LLVMBuildMul(builder
, x_val
, lp_build_const_int32(gallivm
, (dst_type
.width
/ 8) * dst_type
.length
), "");
1485 x_val
= lp_build_const_int32(gallivm
, x
* (dst_type
.width
/ 8) * dst_type
.length
);
1487 LLVMValueRef bx
= x_val
;
1489 LLVMValueRef y_val
= lp_build_const_int32(gallivm
, y
);
1491 y_val
= LLVMBuildAdd(builder
, y_val
, y_offset
, "");
1492 LLVMValueRef by
= LLVMBuildMul(builder
, y_val
, stride
, "");
1494 LLVMValueRef gep
[2];
1495 LLVMValueRef dst_ptr
;
1497 gep
[0] = lp_build_const_int32(gallivm
, 0);
1498 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
1500 dst_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
1501 dst_ptr
= LLVMBuildBitCast(builder
, dst_ptr
,
1502 LLVMPointerType(lp_build_vec_type(gallivm
, dst_type
), 0), "");
1504 dst
[i
] = LLVMBuildLoad(builder
, dst_ptr
, "");
1506 LLVMSetAlignment(dst
[i
], dst_alignment
);
1512 * Store an unswizzled block of pixels to memory
1515 store_unswizzled_block(struct gallivm_state
*gallivm
,
1516 LLVMValueRef base_ptr
,
1517 LLVMValueRef stride
,
1518 unsigned block_width
,
1519 unsigned block_height
,
1521 struct lp_type src_type
,
1523 unsigned src_alignment
)
1525 LLVMBuilderRef builder
= gallivm
->builder
;
1526 unsigned row_size
= src_count
/ block_height
;
1529 /* Ensure src exactly fits into block */
1530 assert((block_width
* block_height
) % src_count
== 0);
1532 for (i
= 0; i
< src_count
; ++i
) {
1533 unsigned x
= i
% row_size
;
1534 unsigned y
= i
/ row_size
;
1536 LLVMValueRef bx
= lp_build_const_int32(gallivm
, x
* (src_type
.width
/ 8) * src_type
.length
);
1537 LLVMValueRef by
= LLVMBuildMul(builder
, lp_build_const_int32(gallivm
, y
), stride
, "");
1539 LLVMValueRef gep
[2];
1540 LLVMValueRef src_ptr
;
1542 gep
[0] = lp_build_const_int32(gallivm
, 0);
1543 gep
[1] = LLVMBuildAdd(builder
, bx
, by
, "");
1545 src_ptr
= LLVMBuildGEP(builder
, base_ptr
, gep
, 2, "");
1546 src_ptr
= LLVMBuildBitCast(builder
, src_ptr
,
1547 LLVMPointerType(lp_build_vec_type(gallivm
, src_type
), 0), "");
1549 src_ptr
= LLVMBuildStore(builder
, src
[i
], src_ptr
);
1551 LLVMSetAlignment(src_ptr
, src_alignment
);
1558 * Retrieves the type for a format which is usable in the blending code.
1560 * e.g. RGBA16F = 4x float, R3G3B2 = 3x byte
1563 lp_blend_type_from_format_desc(const struct util_format_description
*format_desc
,
1564 struct lp_type
* type
)
1569 if (format_expands_to_float_soa(format_desc
)) {
1570 /* always use ordinary floats for blending */
1571 type
->floating
= true;
1572 type
->fixed
= false;
1580 for (i
= 0; i
< 4; i
++)
1581 if (format_desc
->channel
[i
].type
!= UTIL_FORMAT_TYPE_VOID
)
1585 memset(type
, 0, sizeof(struct lp_type
));
1586 type
->floating
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FLOAT
;
1587 type
->fixed
= format_desc
->channel
[chan
].type
== UTIL_FORMAT_TYPE_FIXED
;
1588 type
->sign
= format_desc
->channel
[chan
].type
!= UTIL_FORMAT_TYPE_UNSIGNED
;
1589 type
->norm
= format_desc
->channel
[chan
].normalized
;
1590 type
->width
= format_desc
->channel
[chan
].size
;
1591 type
->length
= format_desc
->nr_channels
;
1593 for (i
= 1; i
< format_desc
->nr_channels
; ++i
) {
1594 if (format_desc
->channel
[i
].size
> type
->width
)
1595 type
->width
= format_desc
->channel
[i
].size
;
1598 if (type
->floating
) {
1601 if (type
->width
<= 8) {
1603 } else if (type
->width
<= 16) {
1610 if (is_arithmetic_format(format_desc
) && type
->length
== 3) {
1617 * Scale a normalized value from src_bits to dst_bits.
1619 * The exact calculation is
1621 * dst = iround(src * dst_mask / src_mask)
1623 * or with integer rounding
1625 * dst = src * (2*dst_mask + sign(src)*src_mask) / (2*src_mask)
1629 * src_mask = (1 << src_bits) - 1
1630 * dst_mask = (1 << dst_bits) - 1
1632 * but we try to avoid division and multiplication through shifts.
1634 static inline LLVMValueRef
1635 scale_bits(struct gallivm_state
*gallivm
,
1639 struct lp_type src_type
)
1641 LLVMBuilderRef builder
= gallivm
->builder
;
1642 LLVMValueRef result
= src
;
1644 if (dst_bits
< src_bits
) {
1645 int delta_bits
= src_bits
- dst_bits
;
1647 if (delta_bits
<= dst_bits
) {
1649 * Approximate the rescaling with a single shift.
1651 * This gives the wrong rounding.
1654 result
= LLVMBuildLShr(builder
,
1656 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1661 * Try more accurate rescaling.
1665 * Drop the least significant bits to make space for the multiplication.
1667 * XXX: A better approach would be to use a wider integer type as intermediate. But
1668 * this is enough to convert alpha from 16bits -> 2 when rendering to
1669 * PIPE_FORMAT_R10G10B10A2_UNORM.
1671 result
= LLVMBuildLShr(builder
,
1673 lp_build_const_int_vec(gallivm
, src_type
, dst_bits
),
1677 result
= LLVMBuildMul(builder
,
1679 lp_build_const_int_vec(gallivm
, src_type
, (1LL << dst_bits
) - 1),
1683 * Add a rounding term before the division.
1685 * TODO: Handle signed integers too.
1687 if (!src_type
.sign
) {
1688 result
= LLVMBuildAdd(builder
,
1690 lp_build_const_int_vec(gallivm
, src_type
, (1LL << (delta_bits
- 1))),
1695 * Approximate the division by src_mask with a src_bits shift.
1697 * Given the src has already been shifted by dst_bits, all we need
1698 * to do is to shift by the difference.
1701 result
= LLVMBuildLShr(builder
,
1703 lp_build_const_int_vec(gallivm
, src_type
, delta_bits
),
1707 } else if (dst_bits
> src_bits
) {
1709 int db
= dst_bits
- src_bits
;
1711 /* Shift left by difference in bits */
1712 result
= LLVMBuildShl(builder
,
1714 lp_build_const_int_vec(gallivm
, src_type
, db
),
1717 if (db
<= src_bits
) {
1718 /* Enough bits in src to fill the remainder */
1719 LLVMValueRef lower
= LLVMBuildLShr(builder
,
1721 lp_build_const_int_vec(gallivm
, src_type
, src_bits
- db
),
1724 result
= LLVMBuildOr(builder
, result
, lower
, "");
1725 } else if (db
> src_bits
) {
1726 /* Need to repeatedly copy src bits to fill remainder in dst */
1729 for (n
= src_bits
; n
< dst_bits
; n
*= 2) {
1730 LLVMValueRef shuv
= lp_build_const_int_vec(gallivm
, src_type
, n
);
1732 result
= LLVMBuildOr(builder
,
1734 LLVMBuildLShr(builder
, result
, shuv
, ""),
1744 * If RT is a smallfloat (needing denorms) format
1747 have_smallfloat_format(struct lp_type dst_type
,
1748 enum pipe_format format
)
1750 return ((dst_type
.floating
&& dst_type
.width
!= 32) ||
1751 /* due to format handling hacks this format doesn't have floating set
1752 * here (and actually has width set to 32 too) so special case this. */
1753 (format
== PIPE_FORMAT_R11G11B10_FLOAT
));
1758 * Convert from memory format to blending format
1760 * e.g. GL_R3G3B2 is 1 byte in memory but 3 bytes for blending
1763 convert_to_blend_type(struct gallivm_state
*gallivm
,
1764 unsigned block_size
,
1765 const struct util_format_description
*src_fmt
,
1766 struct lp_type src_type
,
1767 struct lp_type dst_type
,
1768 LLVMValueRef
* src
, // and dst
1771 LLVMValueRef
*dst
= src
;
1772 LLVMBuilderRef builder
= gallivm
->builder
;
1773 struct lp_type blend_type
;
1774 struct lp_type mem_type
;
1776 unsigned pixels
= block_size
/ num_srcs
;
1780 * full custom path for packed floats and srgb formats - none of the later
1781 * functions would do anything useful, and given the lp_type representation they
1782 * can't be fixed. Should really have some SoA blend path for these kind of
1783 * formats rather than hacking them in here.
1785 if (format_expands_to_float_soa(src_fmt
)) {
1786 LLVMValueRef tmpsrc
[4];
1788 * This is pretty suboptimal for this case blending in SoA would be much
1789 * better, since conversion gets us SoA values so need to convert back.
1791 assert(src_type
.width
== 32 || src_type
.width
== 16);
1792 assert(dst_type
.floating
);
1793 assert(dst_type
.width
== 32);
1794 assert(dst_type
.length
% 4 == 0);
1795 assert(num_srcs
% 4 == 0);
1797 if (src_type
.width
== 16) {
1798 /* expand 4x16bit values to 4x32bit */
1799 struct lp_type type32x4
= src_type
;
1800 LLVMTypeRef ltype32x4
;
1801 unsigned num_fetch
= dst_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
1802 type32x4
.width
= 32;
1803 ltype32x4
= lp_build_vec_type(gallivm
, type32x4
);
1804 for (i
= 0; i
< num_fetch
; i
++) {
1805 src
[i
] = LLVMBuildZExt(builder
, src
[i
], ltype32x4
, "");
1807 src_type
.width
= 32;
1809 for (i
= 0; i
< 4; i
++) {
1812 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1813 LLVMValueRef tmpsoa
[4];
1814 LLVMValueRef tmps
= tmpsrc
[i
];
1815 if (dst_type
.length
== 8) {
1816 LLVMValueRef shuffles
[8];
1818 /* fetch was 4 values but need 8-wide output values */
1819 tmps
= lp_build_concat(gallivm
, &tmpsrc
[i
* 2], src_type
, 2);
1821 * for 8-wide aos transpose would give us wrong order not matching
1822 * incoming converted fs values and mask. ARGH.
1824 for (j
= 0; j
< 4; j
++) {
1825 shuffles
[j
] = lp_build_const_int32(gallivm
, j
* 2);
1826 shuffles
[j
+ 4] = lp_build_const_int32(gallivm
, j
* 2 + 1);
1828 tmps
= LLVMBuildShuffleVector(builder
, tmps
, tmps
,
1829 LLVMConstVector(shuffles
, 8), "");
1831 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1832 lp_build_r11g11b10_to_float(gallivm
, tmps
, tmpsoa
);
1835 lp_build_unpack_rgba_soa(gallivm
, src_fmt
, dst_type
, tmps
, tmpsoa
);
1837 lp_build_transpose_aos(gallivm
, dst_type
, tmpsoa
, &src
[i
* 4]);
1842 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
1843 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
1845 /* Is the format arithmetic */
1846 is_arith
= blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
;
1847 is_arith
&= !(mem_type
.width
== 16 && mem_type
.floating
);
1849 /* Pad if necessary */
1850 if (!is_arith
&& src_type
.length
< dst_type
.length
) {
1851 for (i
= 0; i
< num_srcs
; ++i
) {
1852 dst
[i
] = lp_build_pad_vector(gallivm
, src
[i
], dst_type
.length
);
1855 src_type
.length
= dst_type
.length
;
1858 /* Special case for half-floats */
1859 if (mem_type
.width
== 16 && mem_type
.floating
) {
1860 assert(blend_type
.width
== 32 && blend_type
.floating
);
1861 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
1869 src_type
.width
= blend_type
.width
* blend_type
.length
;
1870 blend_type
.length
*= pixels
;
1871 src_type
.length
*= pixels
/ (src_type
.length
/ mem_type
.length
);
1873 for (i
= 0; i
< num_srcs
; ++i
) {
1874 LLVMValueRef chans
[4];
1875 LLVMValueRef res
= NULL
;
1877 dst
[i
] = LLVMBuildZExt(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
1879 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
1881 unsigned sa
= src_fmt
->channel
[j
].shift
;
1882 #if UTIL_ARCH_LITTLE_ENDIAN
1883 unsigned from_lsb
= j
;
1885 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
1888 mask
= (1 << src_fmt
->channel
[j
].size
) - 1;
1890 /* Extract bits from source */
1891 chans
[j
] = LLVMBuildLShr(builder
,
1893 lp_build_const_int_vec(gallivm
, src_type
, sa
),
1896 chans
[j
] = LLVMBuildAnd(builder
,
1898 lp_build_const_int_vec(gallivm
, src_type
, mask
),
1902 if (src_type
.norm
) {
1903 chans
[j
] = scale_bits(gallivm
, src_fmt
->channel
[j
].size
,
1904 blend_type
.width
, chans
[j
], src_type
);
1907 /* Insert bits into correct position */
1908 chans
[j
] = LLVMBuildShl(builder
,
1910 lp_build_const_int_vec(gallivm
, src_type
, from_lsb
* blend_type
.width
),
1916 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
1920 dst
[i
] = LLVMBuildBitCast(builder
, res
, lp_build_vec_type(gallivm
, blend_type
), "");
1926 * Convert from blending format to memory format
1928 * e.g. GL_R3G3B2 is 3 bytes for blending but 1 byte in memory
1931 convert_from_blend_type(struct gallivm_state
*gallivm
,
1932 unsigned block_size
,
1933 const struct util_format_description
*src_fmt
,
1934 struct lp_type src_type
,
1935 struct lp_type dst_type
,
1936 LLVMValueRef
* src
, // and dst
1939 LLVMValueRef
* dst
= src
;
1941 struct lp_type mem_type
;
1942 struct lp_type blend_type
;
1943 LLVMBuilderRef builder
= gallivm
->builder
;
1944 unsigned pixels
= block_size
/ num_srcs
;
1948 * full custom path for packed floats and srgb formats - none of the later
1949 * functions would do anything useful, and given the lp_type representation they
1950 * can't be fixed. Should really have some SoA blend path for these kind of
1951 * formats rather than hacking them in here.
1953 if (format_expands_to_float_soa(src_fmt
)) {
1955 * This is pretty suboptimal for this case blending in SoA would be much
1956 * better - we need to transpose the AoS values back to SoA values for
1957 * conversion/packing.
1959 assert(src_type
.floating
);
1960 assert(src_type
.width
== 32);
1961 assert(src_type
.length
% 4 == 0);
1962 assert(dst_type
.width
== 32 || dst_type
.width
== 16);
1964 for (i
= 0; i
< num_srcs
/ 4; i
++) {
1965 LLVMValueRef tmpsoa
[4], tmpdst
;
1966 lp_build_transpose_aos(gallivm
, src_type
, &src
[i
* 4], tmpsoa
);
1967 /* really really need SoA here */
1969 if (src_fmt
->format
== PIPE_FORMAT_R11G11B10_FLOAT
) {
1970 tmpdst
= lp_build_float_to_r11g11b10(gallivm
, tmpsoa
);
1973 tmpdst
= lp_build_float_to_srgb_packed(gallivm
, src_fmt
,
1977 if (src_type
.length
== 8) {
1978 LLVMValueRef tmpaos
, shuffles
[8];
1981 * for 8-wide aos transpose has given us wrong order not matching
1982 * output order. HMPF. Also need to split the output values manually.
1984 for (j
= 0; j
< 4; j
++) {
1985 shuffles
[j
* 2] = lp_build_const_int32(gallivm
, j
);
1986 shuffles
[j
* 2 + 1] = lp_build_const_int32(gallivm
, j
+ 4);
1988 tmpaos
= LLVMBuildShuffleVector(builder
, tmpdst
, tmpdst
,
1989 LLVMConstVector(shuffles
, 8), "");
1990 src
[i
* 2] = lp_build_extract_range(gallivm
, tmpaos
, 0, 4);
1991 src
[i
* 2 + 1] = lp_build_extract_range(gallivm
, tmpaos
, 4, 4);
1997 if (dst_type
.width
== 16) {
1998 struct lp_type type16x8
= dst_type
;
1999 struct lp_type type32x4
= dst_type
;
2000 LLVMTypeRef ltype16x4
, ltypei64
, ltypei128
;
2001 unsigned num_fetch
= src_type
.length
== 8 ? num_srcs
/ 2 : num_srcs
/ 4;
2002 type16x8
.length
= 8;
2003 type32x4
.width
= 32;
2004 ltypei128
= LLVMIntTypeInContext(gallivm
->context
, 128);
2005 ltypei64
= LLVMIntTypeInContext(gallivm
->context
, 64);
2006 ltype16x4
= lp_build_vec_type(gallivm
, dst_type
);
2007 /* We could do vector truncation but it doesn't generate very good code */
2008 for (i
= 0; i
< num_fetch
; i
++) {
2009 src
[i
] = lp_build_pack2(gallivm
, type32x4
, type16x8
,
2010 src
[i
], lp_build_zero(gallivm
, type32x4
));
2011 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltypei128
, "");
2012 src
[i
] = LLVMBuildTrunc(builder
, src
[i
], ltypei64
, "");
2013 src
[i
] = LLVMBuildBitCast(builder
, src
[i
], ltype16x4
, "");
2019 lp_mem_type_from_format_desc(src_fmt
, &mem_type
);
2020 lp_blend_type_from_format_desc(src_fmt
, &blend_type
);
2022 is_arith
= (blend_type
.length
* blend_type
.width
!= mem_type
.width
* mem_type
.length
);
2024 /* Special case for half-floats */
2025 if (mem_type
.width
== 16 && mem_type
.floating
) {
2026 int length
= dst_type
.length
;
2027 assert(blend_type
.width
== 32 && blend_type
.floating
);
2029 dst_type
.length
= src_type
.length
;
2031 lp_build_conv_auto(gallivm
, src_type
, &dst_type
, dst
, num_srcs
, dst
);
2033 dst_type
.length
= length
;
2037 /* Remove any padding */
2038 if (!is_arith
&& (src_type
.length
% mem_type
.length
)) {
2039 src_type
.length
-= (src_type
.length
% mem_type
.length
);
2041 for (i
= 0; i
< num_srcs
; ++i
) {
2042 dst
[i
] = lp_build_extract_range(gallivm
, dst
[i
], 0, src_type
.length
);
2046 /* No bit arithmetic to do */
2051 src_type
.length
= pixels
;
2052 src_type
.width
= blend_type
.length
* blend_type
.width
;
2053 dst_type
.length
= pixels
;
2055 for (i
= 0; i
< num_srcs
; ++i
) {
2056 LLVMValueRef chans
[4];
2057 LLVMValueRef res
= NULL
;
2059 dst
[i
] = LLVMBuildBitCast(builder
, src
[i
], lp_build_vec_type(gallivm
, src_type
), "");
2061 for (j
= 0; j
< src_fmt
->nr_channels
; ++j
) {
2063 unsigned sa
= src_fmt
->channel
[j
].shift
;
2064 unsigned sz_a
= src_fmt
->channel
[j
].size
;
2065 #if UTIL_ARCH_LITTLE_ENDIAN
2066 unsigned from_lsb
= j
;
2068 unsigned from_lsb
= src_fmt
->nr_channels
- j
- 1;
2071 assert(blend_type
.width
> src_fmt
->channel
[j
].size
);
2073 for (k
= 0; k
< blend_type
.width
; ++k
) {
2078 chans
[j
] = LLVMBuildLShr(builder
,
2080 lp_build_const_int_vec(gallivm
, src_type
,
2081 from_lsb
* blend_type
.width
),
2084 chans
[j
] = LLVMBuildAnd(builder
,
2086 lp_build_const_int_vec(gallivm
, src_type
, mask
),
2089 /* Scale down bits */
2090 if (src_type
.norm
) {
2091 chans
[j
] = scale_bits(gallivm
, blend_type
.width
,
2092 src_fmt
->channel
[j
].size
, chans
[j
], src_type
);
2093 } else if (!src_type
.floating
&& sz_a
< blend_type
.width
) {
2094 LLVMValueRef mask_val
= lp_build_const_int_vec(gallivm
, src_type
, (1UL << sz_a
) - 1);
2095 LLVMValueRef mask
= LLVMBuildICmp(builder
, LLVMIntUGT
, chans
[j
], mask_val
, "");
2096 chans
[j
] = LLVMBuildSelect(builder
, mask
, mask_val
, chans
[j
], "");
2100 chans
[j
] = LLVMBuildShl(builder
,
2102 lp_build_const_int_vec(gallivm
, src_type
, sa
),
2105 sa
+= src_fmt
->channel
[j
].size
;
2110 res
= LLVMBuildOr(builder
, res
, chans
[j
], "");
2114 assert (dst_type
.width
!= 24);
2116 dst
[i
] = LLVMBuildTrunc(builder
, res
, lp_build_vec_type(gallivm
, dst_type
), "");
2122 * Convert alpha to same blend type as src
2125 convert_alpha(struct gallivm_state
*gallivm
,
2126 struct lp_type row_type
,
2127 struct lp_type alpha_type
,
2128 const unsigned block_size
,
2129 const unsigned block_height
,
2130 const unsigned src_count
,
2131 const unsigned dst_channels
,
2132 const bool pad_inline
,
2133 LLVMValueRef
* src_alpha
)
2135 LLVMBuilderRef builder
= gallivm
->builder
;
2137 unsigned length
= row_type
.length
;
2138 row_type
.length
= alpha_type
.length
;
2140 /* Twiddle the alpha to match pixels */
2141 lp_bld_quad_twiddle(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
);
2144 * TODO this should use single lp_build_conv call for
2145 * src_count == 1 && dst_channels == 1 case (dropping the concat below)
2147 for (i
= 0; i
< block_height
; ++i
) {
2148 lp_build_conv(gallivm
, alpha_type
, row_type
, &src_alpha
[i
], 1, &src_alpha
[i
], 1);
2151 alpha_type
= row_type
;
2152 row_type
.length
= length
;
2154 /* If only one channel we can only need the single alpha value per pixel */
2155 if (src_count
== 1 && dst_channels
== 1) {
2157 lp_build_concat_n(gallivm
, alpha_type
, src_alpha
, block_height
, src_alpha
, src_count
);
2159 /* If there are more srcs than rows then we need to split alpha up */
2160 if (src_count
> block_height
) {
2161 for (i
= src_count
; i
> 0; --i
) {
2162 unsigned pixels
= block_size
/ src_count
;
2163 unsigned idx
= i
- 1;
2165 src_alpha
[idx
] = lp_build_extract_range(gallivm
, src_alpha
[(idx
* pixels
) / 4],
2166 (idx
* pixels
) % 4, pixels
);
2170 /* If there is a src for each pixel broadcast the alpha across whole row */
2171 if (src_count
== block_size
) {
2172 for (i
= 0; i
< src_count
; ++i
) {
2173 src_alpha
[i
] = lp_build_broadcast(gallivm
,
2174 lp_build_vec_type(gallivm
, row_type
), src_alpha
[i
]);
2177 unsigned pixels
= block_size
/ src_count
;
2178 unsigned channels
= pad_inline
? TGSI_NUM_CHANNELS
: dst_channels
;
2179 unsigned alpha_span
= 1;
2180 LLVMValueRef shuffles
[LP_MAX_VECTOR_LENGTH
];
2182 /* Check if we need 2 src_alphas for our shuffles */
2183 if (pixels
> alpha_type
.length
) {
2187 /* Broadcast alpha across all channels, e.g. a1a2 to a1a1a1a1a2a2a2a2 */
2188 for (j
= 0; j
< row_type
.length
; ++j
) {
2189 if (j
< pixels
* channels
) {
2190 shuffles
[j
] = lp_build_const_int32(gallivm
, j
/ channels
);
2192 shuffles
[j
] = LLVMGetUndef(LLVMInt32TypeInContext(gallivm
->context
));
2196 for (i
= 0; i
< src_count
; ++i
) {
2197 unsigned idx1
= i
, idx2
= i
;
2199 if (alpha_span
> 1){
2204 src_alpha
[i
] = LLVMBuildShuffleVector(builder
,
2207 LLVMConstVector(shuffles
, row_type
.length
),
2216 * Generates the blend function for unswizzled colour buffers
2217 * Also generates the read & write from colour buffer
2220 generate_unswizzled_blend(struct gallivm_state
*gallivm
,
2222 struct lp_fragment_shader_variant
*variant
,
2223 enum pipe_format out_format
,
2224 unsigned int num_fs
,
2225 struct lp_type fs_type
,
2226 LLVMValueRef
* fs_mask
,
2227 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][4],
2228 LLVMValueRef context_ptr
,
2229 LLVMValueRef color_ptr
,
2230 LLVMValueRef stride
,
2231 unsigned partial_mask
,
2234 const unsigned alpha_channel
= 3;
2235 const unsigned block_width
= LP_RASTER_BLOCK_SIZE
;
2236 const unsigned block_height
= LP_RASTER_BLOCK_SIZE
;
2237 const unsigned block_size
= block_width
* block_height
;
2238 const unsigned lp_integer_vector_width
= 128;
2240 LLVMBuilderRef builder
= gallivm
->builder
;
2241 LLVMValueRef fs_src
[4][TGSI_NUM_CHANNELS
];
2242 LLVMValueRef fs_src1
[4][TGSI_NUM_CHANNELS
];
2243 LLVMValueRef src_alpha
[4 * 4];
2244 LLVMValueRef src1_alpha
[4 * 4] = { NULL
};
2245 LLVMValueRef src_mask
[4 * 4];
2246 LLVMValueRef src
[4 * 4];
2247 LLVMValueRef src1
[4 * 4];
2248 LLVMValueRef dst
[4 * 4];
2249 LLVMValueRef blend_color
;
2250 LLVMValueRef blend_alpha
;
2251 LLVMValueRef i32_zero
;
2252 LLVMValueRef check_mask
;
2253 LLVMValueRef undef_src_val
;
2255 struct lp_build_mask_context mask_ctx
;
2256 struct lp_type mask_type
;
2257 struct lp_type blend_type
;
2258 struct lp_type row_type
;
2259 struct lp_type dst_type
;
2260 struct lp_type ls_type
;
2262 unsigned char swizzle
[TGSI_NUM_CHANNELS
];
2263 unsigned vector_width
;
2264 unsigned src_channels
= TGSI_NUM_CHANNELS
;
2265 unsigned dst_channels
;
2270 const struct util_format_description
* out_format_desc
= util_format_description(out_format
);
2272 unsigned dst_alignment
;
2274 bool pad_inline
= is_arithmetic_format(out_format_desc
);
2275 bool has_alpha
= false;
2276 const boolean dual_source_blend
= variant
->key
.blend
.rt
[0].blend_enable
&&
2277 util_blend_state_is_dual(&variant
->key
.blend
, 0);
2279 const boolean is_1d
= variant
->key
.resource_1d
;
2280 boolean twiddle_after_convert
= FALSE
;
2281 unsigned num_fullblock_fs
= is_1d
? 2 * num_fs
: num_fs
;
2282 LLVMValueRef fpstate
= 0;
2284 /* Get type from output format */
2285 lp_blend_type_from_format_desc(out_format_desc
, &row_type
);
2286 lp_mem_type_from_format_desc(out_format_desc
, &dst_type
);
2289 * Technically this code should go into lp_build_smallfloat_to_float
2290 * and lp_build_float_to_smallfloat but due to the
2291 * http://llvm.org/bugs/show_bug.cgi?id=6393
2292 * llvm reorders the mxcsr intrinsics in a way that breaks the code.
2293 * So the ordering is important here and there shouldn't be any
2294 * llvm ir instrunctions in this function before
2295 * this, otherwise half-float format conversions won't work
2296 * (again due to llvm bug #6393).
2298 if (have_smallfloat_format(dst_type
, out_format
)) {
2299 /* We need to make sure that denorms are ok for half float
2301 fpstate
= lp_build_fpstate_get(gallivm
);
2302 lp_build_fpstate_set_denorms_zero(gallivm
, FALSE
);
2305 mask_type
= lp_int32_vec4_type();
2306 mask_type
.length
= fs_type
.length
;
2308 for (i
= num_fs
; i
< num_fullblock_fs
; i
++) {
2309 fs_mask
[i
] = lp_build_zero(gallivm
, mask_type
);
2312 /* Do not bother executing code when mask is empty.. */
2314 check_mask
= LLVMConstNull(lp_build_int_vec_type(gallivm
, mask_type
));
2316 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2317 check_mask
= LLVMBuildOr(builder
, check_mask
, fs_mask
[i
], "");
2320 lp_build_mask_begin(&mask_ctx
, gallivm
, mask_type
, check_mask
);
2321 lp_build_mask_check(&mask_ctx
);
2324 partial_mask
|= !variant
->opaque
;
2325 i32_zero
= lp_build_const_int32(gallivm
, 0);
2327 undef_src_val
= lp_build_undef(gallivm
, fs_type
);
2329 row_type
.length
= fs_type
.length
;
2330 vector_width
= dst_type
.floating
? lp_native_vector_width
: lp_integer_vector_width
;
2332 /* Compute correct swizzle and count channels */
2333 memset(swizzle
, LP_BLD_SWIZZLE_DONTCARE
, TGSI_NUM_CHANNELS
);
2336 for (i
= 0; i
< TGSI_NUM_CHANNELS
; ++i
) {
2337 /* Ensure channel is used */
2338 if (out_format_desc
->swizzle
[i
] >= TGSI_NUM_CHANNELS
) {
2342 /* Ensure not already written to (happens in case with GL_ALPHA) */
2343 if (swizzle
[out_format_desc
->swizzle
[i
]] < TGSI_NUM_CHANNELS
) {
2347 /* Ensure we havn't already found all channels */
2348 if (dst_channels
>= out_format_desc
->nr_channels
) {
2352 swizzle
[out_format_desc
->swizzle
[i
]] = i
;
2355 if (i
== alpha_channel
) {
2360 if (format_expands_to_float_soa(out_format_desc
)) {
2362 * the code above can't work for layout_other
2363 * for srgb it would sort of work but we short-circuit swizzles, etc.
2364 * as that is done as part of unpack / pack.
2366 dst_channels
= 4; /* HACK: this is fake 4 really but need it due to transpose stuff later */
2372 pad_inline
= true; /* HACK: prevent rgbxrgbx->rgbrgbxx conversion later */
2375 /* If 3 channels then pad to include alpha for 4 element transpose */
2376 if (dst_channels
== 3) {
2377 assert (!has_alpha
);
2378 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
2379 if (swizzle
[i
] > TGSI_NUM_CHANNELS
)
2382 if (out_format_desc
->nr_channels
== 4) {
2385 * We use alpha from the color conversion, not separate one.
2386 * We had to include it for transpose, hence it will get converted
2387 * too (albeit when doing transpose after conversion, that would
2388 * no longer be the case necessarily).
2389 * (It works only with 4 channel dsts, e.g. rgbx formats, because
2390 * otherwise we really have padding, not alpha, included.)
2397 * Load shader output
2399 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2400 /* Always load alpha for use in blending */
2403 alpha
= LLVMBuildLoad(builder
, fs_out_color
[rt
][alpha_channel
][i
], "");
2406 alpha
= undef_src_val
;
2409 /* Load each channel */
2410 for (j
= 0; j
< dst_channels
; ++j
) {
2411 assert(swizzle
[j
] < 4);
2413 fs_src
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[rt
][swizzle
[j
]][i
], "");
2416 fs_src
[i
][j
] = undef_src_val
;
2420 /* If 3 channels then pad to include alpha for 4 element transpose */
2422 * XXX If we include that here maybe could actually use it instead of
2423 * separate alpha for blending?
2424 * (Difficult though we actually convert pad channels, not alpha.)
2426 if (dst_channels
== 3 && !has_alpha
) {
2427 fs_src
[i
][3] = alpha
;
2430 /* We split the row_mask and row_alpha as we want 128bit interleave */
2431 if (fs_type
.length
== 8) {
2432 src_mask
[i
*2 + 0] = lp_build_extract_range(gallivm
, fs_mask
[i
],
2434 src_mask
[i
*2 + 1] = lp_build_extract_range(gallivm
, fs_mask
[i
],
2435 src_channels
, src_channels
);
2437 src_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
2438 src_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
2439 src_channels
, src_channels
);
2441 src_mask
[i
] = fs_mask
[i
];
2442 src_alpha
[i
] = alpha
;
2445 if (dual_source_blend
) {
2446 /* same as above except different src/dst, skip masks and comments... */
2447 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2450 alpha
= LLVMBuildLoad(builder
, fs_out_color
[1][alpha_channel
][i
], "");
2453 alpha
= undef_src_val
;
2456 for (j
= 0; j
< dst_channels
; ++j
) {
2457 assert(swizzle
[j
] < 4);
2459 fs_src1
[i
][j
] = LLVMBuildLoad(builder
, fs_out_color
[1][swizzle
[j
]][i
], "");
2462 fs_src1
[i
][j
] = undef_src_val
;
2465 if (dst_channels
== 3 && !has_alpha
) {
2466 fs_src1
[i
][3] = alpha
;
2468 if (fs_type
.length
== 8) {
2469 src1_alpha
[i
*2 + 0] = lp_build_extract_range(gallivm
, alpha
, 0, src_channels
);
2470 src1_alpha
[i
*2 + 1] = lp_build_extract_range(gallivm
, alpha
,
2471 src_channels
, src_channels
);
2473 src1_alpha
[i
] = alpha
;
2478 if (util_format_is_pure_integer(out_format
)) {
2480 * In this case fs_type was really ints or uints disguised as floats,
2483 fs_type
.floating
= 0;
2484 fs_type
.sign
= dst_type
.sign
;
2485 for (i
= 0; i
< num_fullblock_fs
; ++i
) {
2486 for (j
= 0; j
< dst_channels
; ++j
) {
2487 fs_src
[i
][j
] = LLVMBuildBitCast(builder
, fs_src
[i
][j
],
2488 lp_build_vec_type(gallivm
, fs_type
), "");
2490 if (dst_channels
== 3 && !has_alpha
) {
2491 fs_src
[i
][3] = LLVMBuildBitCast(builder
, fs_src
[i
][3],
2492 lp_build_vec_type(gallivm
, fs_type
), "");
2498 * We actually should generally do conversion first (for non-1d cases)
2499 * when the blend format is 8 or 16 bits. The reason is obvious,
2500 * there's 2 or 4 times less vectors to deal with for the interleave...
2501 * Albeit for the AVX (not AVX2) case there's no benefit with 16 bit
2502 * vectors (as it can do 32bit unpack with 256bit vectors, but 8/16bit
2503 * unpack only with 128bit vectors).
2504 * Note: for 16bit sizes really need matching pack conversion code
2506 if (!is_1d
&& dst_channels
!= 3 && dst_type
.width
== 8) {
2507 twiddle_after_convert
= TRUE
;
2511 * Pixel twiddle from fragment shader order to memory order
2513 if (!twiddle_after_convert
) {
2514 src_count
= generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
,
2515 dst_channels
, fs_src
, src
, pad_inline
);
2516 if (dual_source_blend
) {
2517 generate_fs_twiddle(gallivm
, fs_type
, num_fullblock_fs
, dst_channels
,
2518 fs_src1
, src1
, pad_inline
);
2521 src_count
= num_fullblock_fs
* dst_channels
;
2523 * We reorder things a bit here, so the cases for 4-wide and 8-wide
2524 * (AVX) turn out the same later when untwiddling/transpose (albeit
2525 * for true AVX2 path untwiddle needs to be different).
2526 * For now just order by colors first (so we can use unpack later).
2528 for (j
= 0; j
< num_fullblock_fs
; j
++) {
2529 for (i
= 0; i
< dst_channels
; i
++) {
2530 src
[i
*num_fullblock_fs
+ j
] = fs_src
[j
][i
];
2531 if (dual_source_blend
) {
2532 src1
[i
*num_fullblock_fs
+ j
] = fs_src1
[j
][i
];
2538 src_channels
= dst_channels
< 3 ? dst_channels
: 4;
2539 if (src_count
!= num_fullblock_fs
* src_channels
) {
2540 unsigned ds
= src_count
/ (num_fullblock_fs
* src_channels
);
2541 row_type
.length
/= ds
;
2542 fs_type
.length
= row_type
.length
;
2545 blend_type
= row_type
;
2546 mask_type
.length
= 4;
2548 /* Convert src to row_type */
2549 if (dual_source_blend
) {
2550 struct lp_type old_row_type
= row_type
;
2551 lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2552 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &old_row_type
, src1
, src_count
, src1
);
2555 src_count
= lp_build_conv_auto(gallivm
, fs_type
, &row_type
, src
, src_count
, src
);
2558 /* If the rows are not an SSE vector, combine them to become SSE size! */
2559 if ((row_type
.width
* row_type
.length
) % 128) {
2560 unsigned bits
= row_type
.width
* row_type
.length
;
2563 assert(src_count
>= (vector_width
/ bits
));
2565 dst_count
= src_count
/ (vector_width
/ bits
);
2567 combined
= lp_build_concat_n(gallivm
, row_type
, src
, src_count
, src
, dst_count
);
2568 if (dual_source_blend
) {
2569 lp_build_concat_n(gallivm
, row_type
, src1
, src_count
, src1
, dst_count
);
2572 row_type
.length
*= combined
;
2573 src_count
/= combined
;
2575 bits
= row_type
.width
* row_type
.length
;
2576 assert(bits
== 128 || bits
== 256);
2579 if (twiddle_after_convert
) {
2580 fs_twiddle_transpose(gallivm
, row_type
, src
, src_count
, src
);
2581 if (dual_source_blend
) {
2582 fs_twiddle_transpose(gallivm
, row_type
, src1
, src_count
, src1
);
2587 * Blend Colour conversion
2589 blend_color
= lp_jit_context_f_blend_color(gallivm
, context_ptr
);
2590 blend_color
= LLVMBuildPointerCast(builder
, blend_color
,
2591 LLVMPointerType(lp_build_vec_type(gallivm
, fs_type
), 0), "");
2592 blend_color
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, blend_color
,
2593 &i32_zero
, 1, ""), "");
2596 lp_build_conv(gallivm
, fs_type
, blend_type
, &blend_color
, 1, &blend_color
, 1);
2598 if (out_format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
) {
2600 * since blending is done with floats, there was no conversion.
2601 * However, the rules according to fixed point renderbuffers still
2602 * apply, that is we must clamp inputs to 0.0/1.0.
2603 * (This would apply to separate alpha conversion too but we currently
2604 * force has_alpha to be true.)
2605 * TODO: should skip this with "fake" blend, since post-blend conversion
2606 * will clamp anyway.
2607 * TODO: could also skip this if fragment color clamping is enabled. We
2608 * don't support it natively so it gets baked into the shader however, so
2609 * can't really tell here.
2611 struct lp_build_context f32_bld
;
2612 assert(row_type
.floating
);
2613 lp_build_context_init(&f32_bld
, gallivm
, row_type
);
2614 for (i
= 0; i
< src_count
; i
++) {
2615 src
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src
[i
]);
2617 if (dual_source_blend
) {
2618 for (i
= 0; i
< src_count
; i
++) {
2619 src1
[i
] = lp_build_clamp_zero_one_nanzero(&f32_bld
, src1
[i
]);
2622 /* probably can't be different than row_type but better safe than sorry... */
2623 lp_build_context_init(&f32_bld
, gallivm
, blend_type
);
2624 blend_color
= lp_build_clamp(&f32_bld
, blend_color
, f32_bld
.zero
, f32_bld
.one
);
2628 blend_alpha
= lp_build_extract_broadcast(gallivm
, blend_type
, row_type
, blend_color
, lp_build_const_int32(gallivm
, 3));
2630 /* Swizzle to appropriate channels, e.g. from RGBA to BGRA BGRA */
2631 pad_inline
&= (dst_channels
* (block_size
/ src_count
) * row_type
.width
) != vector_width
;
2633 /* Use all 4 channels e.g. from RGBA RGBA to RGxx RGxx */
2634 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, TGSI_NUM_CHANNELS
, row_type
.length
);
2636 /* Only use dst_channels e.g. RGBA RGBA to RG RG xxxx */
2637 blend_color
= lp_build_swizzle_aos_n(gallivm
, blend_color
, swizzle
, dst_channels
, row_type
.length
);
2643 lp_bld_quad_twiddle(gallivm
, mask_type
, &src_mask
[0], block_height
, &src_mask
[0]);
2645 if (src_count
< block_height
) {
2646 lp_build_concat_n(gallivm
, mask_type
, src_mask
, 4, src_mask
, src_count
);
2647 } else if (src_count
> block_height
) {
2648 for (i
= src_count
; i
> 0; --i
) {
2649 unsigned pixels
= block_size
/ src_count
;
2650 unsigned idx
= i
- 1;
2652 src_mask
[idx
] = lp_build_extract_range(gallivm
, src_mask
[(idx
* pixels
) / 4],
2653 (idx
* pixels
) % 4, pixels
);
2657 assert(mask_type
.width
== 32);
2659 for (i
= 0; i
< src_count
; ++i
) {
2660 unsigned pixels
= block_size
/ src_count
;
2661 unsigned pixel_width
= row_type
.width
* dst_channels
;
2663 if (pixel_width
== 24) {
2664 mask_type
.width
= 8;
2665 mask_type
.length
= vector_width
/ mask_type
.width
;
2667 mask_type
.length
= pixels
;
2668 mask_type
.width
= row_type
.width
* dst_channels
;
2671 * If mask_type width is smaller than 32bit, this doesn't quite
2672 * generate the most efficient code (could use some pack).
2674 src_mask
[i
] = LLVMBuildIntCast(builder
, src_mask
[i
],
2675 lp_build_int_vec_type(gallivm
, mask_type
), "");
2677 mask_type
.length
*= dst_channels
;
2678 mask_type
.width
/= dst_channels
;
2681 src_mask
[i
] = LLVMBuildBitCast(builder
, src_mask
[i
],
2682 lp_build_int_vec_type(gallivm
, mask_type
), "");
2683 src_mask
[i
] = lp_build_pad_vector(gallivm
, src_mask
[i
], row_type
.length
);
2690 struct lp_type alpha_type
= fs_type
;
2691 alpha_type
.length
= 4;
2692 convert_alpha(gallivm
, row_type
, alpha_type
,
2693 block_size
, block_height
,
2694 src_count
, dst_channels
,
2695 pad_inline
, src_alpha
);
2696 if (dual_source_blend
) {
2697 convert_alpha(gallivm
, row_type
, alpha_type
,
2698 block_size
, block_height
,
2699 src_count
, dst_channels
,
2700 pad_inline
, src1_alpha
);
2706 * Load dst from memory
2708 if (src_count
< block_height
) {
2709 dst_count
= block_height
;
2711 dst_count
= src_count
;
2714 dst_type
.length
*= block_size
/ dst_count
;
2716 if (format_expands_to_float_soa(out_format_desc
)) {
2718 * we need multiple values at once for the conversion, so can as well
2719 * load them vectorized here too instead of concatenating later.
2720 * (Still need concatenation later for 8-wide vectors).
2722 dst_count
= block_height
;
2723 dst_type
.length
= block_width
;
2727 * Compute the alignment of the destination pointer in bytes
2728 * We fetch 1-4 pixels, if the format has pot alignment then those fetches
2729 * are always aligned by MIN2(16, fetch_width) except for buffers (not
2730 * 1d tex but can't distinguish here) so need to stick with per-pixel
2731 * alignment in this case.
2734 dst_alignment
= (out_format_desc
->block
.bits
+ 7)/(out_format_desc
->block
.width
* 8);
2737 dst_alignment
= dst_type
.length
* dst_type
.width
/ 8;
2739 /* Force power-of-two alignment by extracting only the least-significant-bit */
2740 dst_alignment
= 1 << (ffs(dst_alignment
) - 1);
2742 * Resource base and stride pointers are aligned to 16 bytes, so that's
2743 * the maximum alignment we can guarantee
2745 dst_alignment
= MIN2(16, dst_alignment
);
2749 if (dst_count
> src_count
) {
2750 if ((dst_type
.width
== 8 || dst_type
.width
== 16) &&
2751 util_is_power_of_two_or_zero(dst_type
.length
) &&
2752 dst_type
.length
* dst_type
.width
< 128) {
2754 * Never try to load values as 4xi8 which we will then
2755 * concatenate to larger vectors. This gives llvm a real
2756 * headache (the problem is the type legalizer (?) will
2757 * try to load that as 4xi8 zext to 4xi32 to fill the vector,
2758 * then the shuffles to concatenate are more or less impossible
2759 * - llvm is easily capable of generating a sequence of 32
2760 * pextrb/pinsrb instructions for that. Albeit it appears to
2761 * be fixed in llvm 4.0. So, load and concatenate with 32bit
2762 * width to avoid the trouble (16bit seems not as bad, llvm
2763 * probably recognizes the load+shuffle as only one shuffle
2764 * is necessary, but we can do just the same anyway).
2766 ls_type
.length
= dst_type
.length
* dst_type
.width
/ 32;
2772 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2773 dst
, ls_type
, dst_count
/ 4, dst_alignment
, NULL
, NULL
, false);
2774 for (i
= dst_count
/ 4; i
< dst_count
; i
++) {
2775 dst
[i
] = lp_build_undef(gallivm
, ls_type
);
2780 load_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2781 dst
, ls_type
, dst_count
, dst_alignment
, NULL
, NULL
, false);
2786 * Convert from dst/output format to src/blending format.
2788 * This is necessary as we can only read 1 row from memory at a time,
2789 * so the minimum dst_count will ever be at this point is 4.
2791 * With, for example, R8 format you can have all 16 pixels in a 128 bit vector,
2792 * this will take the 4 dsts and combine them into 1 src so we can perform blending
2793 * on all 16 pixels in that single vector at once.
2795 if (dst_count
> src_count
) {
2796 if (ls_type
.length
!= dst_type
.length
&& ls_type
.length
== 1) {
2797 LLVMTypeRef elem_type
= lp_build_elem_type(gallivm
, ls_type
);
2798 LLVMTypeRef ls_vec_type
= LLVMVectorType(elem_type
, 1);
2799 for (i
= 0; i
< dst_count
; i
++) {
2800 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
], ls_vec_type
, "");
2804 lp_build_concat_n(gallivm
, ls_type
, dst
, 4, dst
, src_count
);
2806 if (ls_type
.length
!= dst_type
.length
) {
2807 struct lp_type tmp_type
= dst_type
;
2808 tmp_type
.length
= dst_type
.length
* 4 / src_count
;
2809 for (i
= 0; i
< src_count
; i
++) {
2810 dst
[i
] = LLVMBuildBitCast(builder
, dst
[i
],
2811 lp_build_vec_type(gallivm
, tmp_type
), "");
2819 /* XXX this is broken for RGB8 formats -
2820 * they get expanded from 12 to 16 elements (to include alpha)
2821 * by convert_to_blend_type then reduced to 15 instead of 12
2822 * by convert_from_blend_type (a simple fix though breaks A8...).
2823 * R16G16B16 also crashes differently however something going wrong
2824 * inside llvm handling npot vector sizes seemingly.
2825 * It seems some cleanup could be done here (like skipping conversion/blend
2828 convert_to_blend_type(gallivm
, block_size
, out_format_desc
, dst_type
,
2829 row_type
, dst
, src_count
);
2832 * FIXME: Really should get logic ops / masks out of generic blend / row
2833 * format. Logic ops will definitely not work on the blend float format
2834 * used for SRGB here and I think OpenGL expects this to work as expected
2835 * (that is incoming values converted to srgb then logic op applied).
2837 for (i
= 0; i
< src_count
; ++i
) {
2838 dst
[i
] = lp_build_blend_aos(gallivm
,
2839 &variant
->key
.blend
,
2844 has_alpha
? NULL
: src_alpha
[i
],
2846 has_alpha
? NULL
: src1_alpha
[i
],
2848 partial_mask
? src_mask
[i
] : NULL
,
2850 has_alpha
? NULL
: blend_alpha
,
2852 pad_inline
? 4 : dst_channels
);
2855 convert_from_blend_type(gallivm
, block_size
, out_format_desc
,
2856 row_type
, dst_type
, dst
, src_count
);
2858 /* Split the blend rows back to memory rows */
2859 if (dst_count
> src_count
) {
2860 row_type
.length
= dst_type
.length
* (dst_count
/ src_count
);
2862 if (src_count
== 1) {
2863 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2864 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2866 row_type
.length
/= 2;
2870 dst
[3] = lp_build_extract_range(gallivm
, dst
[1], row_type
.length
/ 2, row_type
.length
/ 2);
2871 dst
[2] = lp_build_extract_range(gallivm
, dst
[1], 0, row_type
.length
/ 2);
2872 dst
[1] = lp_build_extract_range(gallivm
, dst
[0], row_type
.length
/ 2, row_type
.length
/ 2);
2873 dst
[0] = lp_build_extract_range(gallivm
, dst
[0], 0, row_type
.length
/ 2);
2875 row_type
.length
/= 2;
2880 * Store blend result to memory
2883 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, 1,
2884 dst
, dst_type
, dst_count
/ 4, dst_alignment
);
2887 store_unswizzled_block(gallivm
, color_ptr
, stride
, block_width
, block_height
,
2888 dst
, dst_type
, dst_count
, dst_alignment
);
2891 if (have_smallfloat_format(dst_type
, out_format
)) {
2892 lp_build_fpstate_set(gallivm
, fpstate
);
2896 lp_build_mask_end(&mask_ctx
);
2902 * Generate the runtime callable function for the whole fragment pipeline.
2903 * Note that the function which we generate operates on a block of 16
2904 * pixels at at time. The block contains 2x2 quads. Each quad contains
2908 generate_fragment(struct llvmpipe_context
*lp
,
2909 struct lp_fragment_shader
*shader
,
2910 struct lp_fragment_shader_variant
*variant
,
2911 unsigned partial_mask
)
2913 struct gallivm_state
*gallivm
= variant
->gallivm
;
2914 struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
2915 struct lp_shader_input inputs
[PIPE_MAX_SHADER_INPUTS
];
2917 struct lp_type fs_type
;
2918 struct lp_type blend_type
;
2919 LLVMTypeRef fs_elem_type
;
2920 LLVMTypeRef blend_vec_type
;
2921 LLVMTypeRef arg_types
[15];
2922 LLVMTypeRef func_type
;
2923 LLVMTypeRef int32_type
= LLVMInt32TypeInContext(gallivm
->context
);
2924 LLVMTypeRef int8_type
= LLVMInt8TypeInContext(gallivm
->context
);
2925 LLVMValueRef context_ptr
;
2928 LLVMValueRef a0_ptr
;
2929 LLVMValueRef dadx_ptr
;
2930 LLVMValueRef dady_ptr
;
2931 LLVMValueRef color_ptr_ptr
;
2932 LLVMValueRef stride_ptr
;
2933 LLVMValueRef color_sample_stride_ptr
;
2934 LLVMValueRef depth_ptr
;
2935 LLVMValueRef depth_stride
;
2936 LLVMValueRef depth_sample_stride
;
2937 LLVMValueRef mask_input
;
2938 LLVMValueRef thread_data_ptr
;
2939 LLVMBasicBlockRef block
;
2940 LLVMBuilderRef builder
;
2941 struct lp_build_sampler_soa
*sampler
;
2942 struct lp_build_image_soa
*image
;
2943 struct lp_build_interp_soa_context interp
;
2944 LLVMValueRef fs_mask
[(16 / 4) * LP_MAX_SAMPLES
];
2945 LLVMValueRef fs_out_color
[LP_MAX_SAMPLES
][PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
][16 / 4];
2946 LLVMValueRef function
;
2947 LLVMValueRef facing
;
2952 boolean cbuf0_write_all
;
2953 const boolean dual_source_blend
= key
->blend
.rt
[0].blend_enable
&&
2954 util_blend_state_is_dual(&key
->blend
, 0);
2956 assert(lp_native_vector_width
/ 32 >= 4);
2958 /* Adjust color input interpolation according to flatshade state:
2960 memcpy(inputs
, shader
->inputs
, shader
->info
.base
.num_inputs
* sizeof inputs
[0]);
2961 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
2962 if (inputs
[i
].interp
== LP_INTERP_COLOR
) {
2964 inputs
[i
].interp
= LP_INTERP_CONSTANT
;
2966 inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
2970 /* check if writes to cbuf[0] are to be copied to all cbufs */
2972 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COLOR0_WRITES_ALL_CBUFS
];
2974 /* TODO: actually pick these based on the fs and color buffer
2975 * characteristics. */
2977 memset(&fs_type
, 0, sizeof fs_type
);
2978 fs_type
.floating
= TRUE
; /* floating point values */
2979 fs_type
.sign
= TRUE
; /* values are signed */
2980 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
2981 fs_type
.width
= 32; /* 32-bit float */
2982 fs_type
.length
= MIN2(lp_native_vector_width
/ 32, 16); /* n*4 elements per vector */
2984 memset(&blend_type
, 0, sizeof blend_type
);
2985 blend_type
.floating
= FALSE
; /* values are integers */
2986 blend_type
.sign
= FALSE
; /* values are unsigned */
2987 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
2988 blend_type
.width
= 8; /* 8-bit ubyte values */
2989 blend_type
.length
= 16; /* 16 elements per vector */
2992 * Generate the function prototype. Any change here must be reflected in
2993 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
2996 fs_elem_type
= lp_build_elem_type(gallivm
, fs_type
);
2998 blend_vec_type
= lp_build_vec_type(gallivm
, blend_type
);
3000 snprintf(func_name
, sizeof(func_name
), "fs_variant_%s",
3001 partial_mask
? "partial" : "whole");
3003 arg_types
[0] = variant
->jit_context_ptr_type
; /* context */
3004 arg_types
[1] = int32_type
; /* x */
3005 arg_types
[2] = int32_type
; /* y */
3006 arg_types
[3] = int32_type
; /* facing */
3007 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
3008 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
3009 arg_types
[6] = LLVMPointerType(fs_elem_type
, 0); /* dady */
3010 arg_types
[7] = LLVMPointerType(LLVMPointerType(int8_type
, 0), 0); /* color */
3011 arg_types
[8] = LLVMPointerType(int8_type
, 0); /* depth */
3012 arg_types
[9] = LLVMInt64TypeInContext(gallivm
->context
); /* mask_input */
3013 arg_types
[10] = variant
->jit_thread_data_ptr_type
; /* per thread data */
3014 arg_types
[11] = LLVMPointerType(int32_type
, 0); /* stride */
3015 arg_types
[12] = int32_type
; /* depth_stride */
3016 arg_types
[13] = LLVMPointerType(int32_type
, 0); /* color sample strides */
3017 arg_types
[14] = int32_type
; /* depth sample stride */
3019 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
3020 arg_types
, ARRAY_SIZE(arg_types
), 0);
3022 function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
3023 LLVMSetFunctionCallConv(function
, LLVMCCallConv
);
3025 variant
->function
[partial_mask
] = function
;
3027 /* XXX: need to propagate noalias down into color param now we are
3028 * passing a pointer-to-pointer?
3030 for(i
= 0; i
< ARRAY_SIZE(arg_types
); ++i
)
3031 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
3032 lp_add_function_attr(function
, i
+ 1, LP_FUNC_ATTR_NOALIAS
);
3034 if (variant
->gallivm
->cache
->data_size
)
3037 context_ptr
= LLVMGetParam(function
, 0);
3038 x
= LLVMGetParam(function
, 1);
3039 y
= LLVMGetParam(function
, 2);
3040 facing
= LLVMGetParam(function
, 3);
3041 a0_ptr
= LLVMGetParam(function
, 4);
3042 dadx_ptr
= LLVMGetParam(function
, 5);
3043 dady_ptr
= LLVMGetParam(function
, 6);
3044 color_ptr_ptr
= LLVMGetParam(function
, 7);
3045 depth_ptr
= LLVMGetParam(function
, 8);
3046 mask_input
= LLVMGetParam(function
, 9);
3047 thread_data_ptr
= LLVMGetParam(function
, 10);
3048 stride_ptr
= LLVMGetParam(function
, 11);
3049 depth_stride
= LLVMGetParam(function
, 12);
3050 color_sample_stride_ptr
= LLVMGetParam(function
, 13);
3051 depth_sample_stride
= LLVMGetParam(function
, 14);
3053 lp_build_name(context_ptr
, "context");
3054 lp_build_name(x
, "x");
3055 lp_build_name(y
, "y");
3056 lp_build_name(a0_ptr
, "a0");
3057 lp_build_name(dadx_ptr
, "dadx");
3058 lp_build_name(dady_ptr
, "dady");
3059 lp_build_name(color_ptr_ptr
, "color_ptr_ptr");
3060 lp_build_name(depth_ptr
, "depth");
3061 lp_build_name(mask_input
, "mask_input");
3062 lp_build_name(thread_data_ptr
, "thread_data");
3063 lp_build_name(stride_ptr
, "stride_ptr");
3064 lp_build_name(depth_stride
, "depth_stride");
3065 lp_build_name(color_sample_stride_ptr
, "color_sample_stride_ptr");
3066 lp_build_name(depth_sample_stride
, "depth_sample_stride");
3072 block
= LLVMAppendBasicBlockInContext(gallivm
->context
, function
, "entry");
3073 builder
= gallivm
->builder
;
3075 LLVMPositionBuilderAtEnd(builder
, block
);
3078 * Must not count ps invocations if there's a null shader.
3079 * (It would be ok to count with null shader if there's d/s tests,
3080 * but only if there's d/s buffers too, which is different
3081 * to implicit rasterization disable which must not depend
3082 * on the d/s buffers.)
3083 * Could use popcount on mask, but pixel accuracy is not required.
3084 * Could disable if there's no stats query, but maybe not worth it.
3086 if (shader
->info
.base
.num_instructions
> 1) {
3087 LLVMValueRef invocs
, val
;
3088 invocs
= lp_jit_thread_data_invocations(gallivm
, thread_data_ptr
);
3089 val
= LLVMBuildLoad(builder
, invocs
, "");
3090 val
= LLVMBuildAdd(builder
, val
,
3091 LLVMConstInt(LLVMInt64TypeInContext(gallivm
->context
), 1, 0),
3093 LLVMBuildStore(builder
, val
, invocs
);
3096 /* code generated texture sampling */
3097 sampler
= lp_llvm_sampler_soa_create(key
->samplers
, key
->nr_samplers
);
3098 image
= lp_llvm_image_soa_create(lp_fs_variant_key_images(key
), key
->nr_images
);
3100 num_fs
= 16 / fs_type
.length
; /* number of loops per 4x4 stamp */
3101 /* for 1d resources only run "upper half" of stamp */
3102 if (key
->resource_1d
)
3106 LLVMValueRef num_loop
= lp_build_const_int32(gallivm
, num_fs
);
3107 LLVMTypeRef mask_type
= lp_build_int_vec_type(gallivm
, fs_type
);
3108 LLVMValueRef num_loop_samp
= lp_build_const_int32(gallivm
, num_fs
* key
->coverage_samples
);
3109 LLVMValueRef mask_store
= lp_build_array_alloca(gallivm
, mask_type
,
3110 num_loop_samp
, "mask_store");
3112 LLVMTypeRef flt_type
= LLVMFloatTypeInContext(gallivm
->context
);
3113 LLVMValueRef glob_sample_pos
= LLVMAddGlobal(gallivm
->module
, LLVMArrayType(flt_type
, key
->coverage_samples
* 2), "");
3114 LLVMValueRef sample_pos_array
;
3116 if (key
->multisample
&& key
->coverage_samples
== 4) {
3117 LLVMValueRef sample_pos_arr
[8];
3118 for (unsigned i
= 0; i
< 4; i
++) {
3119 sample_pos_arr
[i
* 2] = LLVMConstReal(flt_type
, lp_sample_pos_4x
[i
][0]);
3120 sample_pos_arr
[i
* 2 + 1] = LLVMConstReal(flt_type
, lp_sample_pos_4x
[i
][1]);
3122 sample_pos_array
= LLVMConstArray(LLVMFloatTypeInContext(gallivm
->context
), sample_pos_arr
, 8);
3124 LLVMValueRef sample_pos_arr
[2];
3125 sample_pos_arr
[0] = LLVMConstReal(flt_type
, 0.5);
3126 sample_pos_arr
[1] = LLVMConstReal(flt_type
, 0.5);
3127 sample_pos_array
= LLVMConstArray(LLVMFloatTypeInContext(gallivm
->context
), sample_pos_arr
, 2);
3129 LLVMSetInitializer(glob_sample_pos
, sample_pos_array
);
3131 LLVMValueRef color_store
[PIPE_MAX_COLOR_BUFS
][TGSI_NUM_CHANNELS
];
3132 boolean pixel_center_integer
=
3133 shader
->info
.base
.properties
[TGSI_PROPERTY_FS_COORD_PIXEL_CENTER
];
3136 * The shader input interpolation info is not explicitely baked in the
3137 * shader key, but everything it derives from (TGSI, and flatshade) is
3138 * already included in the shader key.
3140 lp_build_interp_soa_init(&interp
,
3142 shader
->info
.base
.num_inputs
,
3144 pixel_center_integer
,
3145 key
->coverage_samples
, glob_sample_pos
,
3149 a0_ptr
, dadx_ptr
, dady_ptr
,
3152 for (i
= 0; i
< num_fs
; i
++) {
3153 if (key
->multisample
) {
3154 LLVMValueRef smask_val
= LLVMBuildLoad(builder
, lp_jit_context_sample_mask(gallivm
, context_ptr
), "");
3157 * For multisampling, extract the per-sample mask from the incoming 64-bit mask,
3158 * store to the per sample mask storage. Or all of them together to generate
3159 * the fragment shader mask. (sample shading TODO).
3160 * Take the incoming state coverage mask into account.
3162 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
3163 LLVMValueRef sindexi
= lp_build_const_int32(gallivm
, i
+ (s
* num_fs
));
3164 LLVMValueRef sample_mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
3165 &sindexi
, 1, "sample_mask_ptr");
3166 LLVMValueRef s_mask
= generate_quad_mask(gallivm
, fs_type
,
3167 i
*fs_type
.length
/4, s
, mask_input
);
3169 LLVMValueRef smask_bit
= LLVMBuildAnd(builder
, smask_val
, lp_build_const_int32(gallivm
, (1 << s
)), "");
3170 LLVMValueRef cmp
= LLVMBuildICmp(builder
, LLVMIntNE
, smask_bit
, lp_build_const_int32(gallivm
, 0), "");
3171 smask_bit
= LLVMBuildSExt(builder
, cmp
, int32_type
, "");
3172 smask_bit
= lp_build_broadcast(gallivm
, mask_type
, smask_bit
);
3174 s_mask
= LLVMBuildAnd(builder
, s_mask
, smask_bit
, "");
3175 LLVMBuildStore(builder
, s_mask
, sample_mask_ptr
);
3179 LLVMValueRef indexi
= lp_build_const_int32(gallivm
, i
);
3180 LLVMValueRef mask_ptr
= LLVMBuildGEP(builder
, mask_store
,
3181 &indexi
, 1, "mask_ptr");
3184 mask
= generate_quad_mask(gallivm
, fs_type
,
3185 i
*fs_type
.length
/4, 0, mask_input
);
3188 mask
= lp_build_const_int_vec(gallivm
, fs_type
, ~0);
3190 LLVMBuildStore(builder
, mask
, mask_ptr
);
3194 generate_fs_loop(gallivm
,
3204 mask_store
, /* output */
3208 depth_sample_stride
,
3211 color_sample_stride_ptr
,
3215 for (i
= 0; i
< num_fs
; i
++) {
3217 for (unsigned s
= 0; s
< key
->coverage_samples
; s
++) {
3218 int idx
= (i
+ (s
* num_fs
));
3219 LLVMValueRef sindexi
= lp_build_const_int32(gallivm
, idx
);
3220 ptr
= LLVMBuildGEP(builder
, mask_store
, &sindexi
, 1, "");
3222 fs_mask
[idx
] = LLVMBuildLoad(builder
, ptr
, "smask");
3225 for (unsigned s
= 0; s
< key
->min_samples
; s
++) {
3226 /* This is fucked up need to reorganize things */
3227 int idx
= s
* num_fs
+ i
;
3228 LLVMValueRef sindexi
= lp_build_const_int32(gallivm
, idx
);
3229 for (cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
3230 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
3231 ptr
= LLVMBuildGEP(builder
,
3232 color_store
[cbuf
* !cbuf0_write_all
][chan
],
3234 fs_out_color
[s
][cbuf
][chan
][i
] = ptr
;
3237 if (dual_source_blend
) {
3238 /* only support one dual source blend target hence always use output 1 */
3239 for (chan
= 0; chan
< TGSI_NUM_CHANNELS
; ++chan
) {
3240 ptr
= LLVMBuildGEP(builder
,
3241 color_store
[1][chan
],
3243 fs_out_color
[s
][1][chan
][i
] = ptr
;
3250 sampler
->destroy(sampler
);
3251 image
->destroy(image
);
3252 /* Loop over color outputs / color buffers to do blending.
3254 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
3255 if (key
->cbuf_format
[cbuf
] != PIPE_FORMAT_NONE
) {
3256 LLVMValueRef color_ptr
;
3257 LLVMValueRef stride
;
3258 LLVMValueRef sample_stride
= NULL
;
3259 LLVMValueRef index
= lp_build_const_int32(gallivm
, cbuf
);
3261 boolean do_branch
= ((key
->depth
.enabled
3262 || key
->stencil
[0].enabled
3263 || key
->alpha
.enabled
)
3264 && !shader
->info
.base
.uses_kill
);
3266 color_ptr
= LLVMBuildLoad(builder
,
3267 LLVMBuildGEP(builder
, color_ptr_ptr
,
3271 stride
= LLVMBuildLoad(builder
,
3272 LLVMBuildGEP(builder
, stride_ptr
, &index
, 1, ""),
3275 if (key
->multisample
)
3276 sample_stride
= LLVMBuildLoad(builder
,
3277 LLVMBuildGEP(builder
, color_sample_stride_ptr
,
3278 &index
, 1, ""), "");
3280 for (unsigned s
= 0; s
< key
->cbuf_nr_samples
[cbuf
]; s
++) {
3281 unsigned mask_idx
= num_fs
* (key
->multisample
? s
: 0);
3282 unsigned out_idx
= key
->min_samples
== 1 ? 0 : s
;
3283 LLVMValueRef out_ptr
= color_ptr
;;
3285 if (key
->multisample
) {
3286 LLVMValueRef sample_offset
= LLVMBuildMul(builder
, sample_stride
, lp_build_const_int32(gallivm
, s
), "");
3287 out_ptr
= LLVMBuildGEP(builder
, out_ptr
, &sample_offset
, 1, "");
3289 out_ptr
= LLVMBuildBitCast(builder
, out_ptr
, LLVMPointerType(blend_vec_type
, 0), "");
3291 lp_build_name(out_ptr
, "color_ptr%d", cbuf
);
3293 generate_unswizzled_blend(gallivm
, cbuf
, variant
,
3294 key
->cbuf_format
[cbuf
],
3295 num_fs
, fs_type
, &fs_mask
[mask_idx
], fs_out_color
[out_idx
],
3296 context_ptr
, out_ptr
, stride
,
3297 partial_mask
, do_branch
);
3302 LLVMBuildRetVoid(builder
);
3304 gallivm_verify_function(gallivm
, function
);
3309 dump_fs_variant_key(struct lp_fragment_shader_variant_key
*key
)
3313 debug_printf("fs variant %p:\n", (void *) key
);
3315 if (key
->flatshade
) {
3316 debug_printf("flatshade = 1\n");
3318 if (key
->multisample
) {
3319 debug_printf("multisample = 1\n");
3320 debug_printf("coverage samples = %d\n", key
->coverage_samples
);
3321 debug_printf("min samples = %d\n", key
->min_samples
);
3323 for (i
= 0; i
< key
->nr_cbufs
; ++i
) {
3324 debug_printf("cbuf_format[%u] = %s\n", i
, util_format_name(key
->cbuf_format
[i
]));
3325 debug_printf("cbuf nr_samples[%u] = %d\n", i
, key
->cbuf_nr_samples
[i
]);
3327 if (key
->depth
.enabled
|| key
->stencil
[0].enabled
) {
3328 debug_printf("depth.format = %s\n", util_format_name(key
->zsbuf_format
));
3329 debug_printf("depth nr_samples = %d\n", key
->zsbuf_nr_samples
);
3331 if (key
->depth
.enabled
) {
3332 debug_printf("depth.func = %s\n", util_str_func(key
->depth
.func
, TRUE
));
3333 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
3336 for (i
= 0; i
< 2; ++i
) {
3337 if (key
->stencil
[i
].enabled
) {
3338 debug_printf("stencil[%u].func = %s\n", i
, util_str_func(key
->stencil
[i
].func
, TRUE
));
3339 debug_printf("stencil[%u].fail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].fail_op
, TRUE
));
3340 debug_printf("stencil[%u].zpass_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zpass_op
, TRUE
));
3341 debug_printf("stencil[%u].zfail_op = %s\n", i
, util_str_stencil_op(key
->stencil
[i
].zfail_op
, TRUE
));
3342 debug_printf("stencil[%u].valuemask = 0x%x\n", i
, key
->stencil
[i
].valuemask
);
3343 debug_printf("stencil[%u].writemask = 0x%x\n", i
, key
->stencil
[i
].writemask
);
3347 if (key
->alpha
.enabled
) {
3348 debug_printf("alpha.func = %s\n", util_str_func(key
->alpha
.func
, TRUE
));
3351 if (key
->occlusion_count
) {
3352 debug_printf("occlusion_count = 1\n");
3355 if (key
->blend
.logicop_enable
) {
3356 debug_printf("blend.logicop_func = %s\n", util_str_logicop(key
->blend
.logicop_func
, TRUE
));
3358 else if (key
->blend
.rt
[0].blend_enable
) {
3359 debug_printf("blend.rgb_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].rgb_func
, TRUE
));
3360 debug_printf("blend.rgb_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_src_factor
, TRUE
));
3361 debug_printf("blend.rgb_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].rgb_dst_factor
, TRUE
));
3362 debug_printf("blend.alpha_func = %s\n", util_str_blend_func (key
->blend
.rt
[0].alpha_func
, TRUE
));
3363 debug_printf("blend.alpha_src_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_src_factor
, TRUE
));
3364 debug_printf("blend.alpha_dst_factor = %s\n", util_str_blend_factor(key
->blend
.rt
[0].alpha_dst_factor
, TRUE
));
3366 debug_printf("blend.colormask = 0x%x\n", key
->blend
.rt
[0].colormask
);
3367 if (key
->blend
.alpha_to_coverage
) {
3368 debug_printf("blend.alpha_to_coverage is enabled\n");
3370 for (i
= 0; i
< key
->nr_samplers
; ++i
) {
3371 const struct lp_static_sampler_state
*sampler
= &key
->samplers
[i
].sampler_state
;
3372 debug_printf("sampler[%u] = \n", i
);
3373 debug_printf(" .wrap = %s %s %s\n",
3374 util_str_tex_wrap(sampler
->wrap_s
, TRUE
),
3375 util_str_tex_wrap(sampler
->wrap_t
, TRUE
),
3376 util_str_tex_wrap(sampler
->wrap_r
, TRUE
));
3377 debug_printf(" .min_img_filter = %s\n",
3378 util_str_tex_filter(sampler
->min_img_filter
, TRUE
));
3379 debug_printf(" .min_mip_filter = %s\n",
3380 util_str_tex_mipfilter(sampler
->min_mip_filter
, TRUE
));
3381 debug_printf(" .mag_img_filter = %s\n",
3382 util_str_tex_filter(sampler
->mag_img_filter
, TRUE
));
3383 if (sampler
->compare_mode
!= PIPE_TEX_COMPARE_NONE
)
3384 debug_printf(" .compare_func = %s\n", util_str_func(sampler
->compare_func
, TRUE
));
3385 debug_printf(" .normalized_coords = %u\n", sampler
->normalized_coords
);
3386 debug_printf(" .min_max_lod_equal = %u\n", sampler
->min_max_lod_equal
);
3387 debug_printf(" .lod_bias_non_zero = %u\n", sampler
->lod_bias_non_zero
);
3388 debug_printf(" .apply_min_lod = %u\n", sampler
->apply_min_lod
);
3389 debug_printf(" .apply_max_lod = %u\n", sampler
->apply_max_lod
);
3391 for (i
= 0; i
< key
->nr_sampler_views
; ++i
) {
3392 const struct lp_static_texture_state
*texture
= &key
->samplers
[i
].texture_state
;
3393 debug_printf("texture[%u] = \n", i
);
3394 debug_printf(" .format = %s\n",
3395 util_format_name(texture
->format
));
3396 debug_printf(" .target = %s\n",
3397 util_str_tex_target(texture
->target
, TRUE
));
3398 debug_printf(" .level_zero_only = %u\n",
3399 texture
->level_zero_only
);
3400 debug_printf(" .pot = %u %u %u\n",
3402 texture
->pot_height
,
3403 texture
->pot_depth
);
3405 struct lp_image_static_state
*images
= lp_fs_variant_key_images(key
);
3406 for (i
= 0; i
< key
->nr_images
; ++i
) {
3407 const struct lp_static_texture_state
*image
= &images
[i
].image_state
;
3408 debug_printf("image[%u] = \n", i
);
3409 debug_printf(" .format = %s\n",
3410 util_format_name(image
->format
));
3411 debug_printf(" .target = %s\n",
3412 util_str_tex_target(image
->target
, TRUE
));
3413 debug_printf(" .level_zero_only = %u\n",
3414 image
->level_zero_only
);
3415 debug_printf(" .pot = %u %u %u\n",
3424 lp_debug_fs_variant(struct lp_fragment_shader_variant
*variant
)
3426 debug_printf("llvmpipe: Fragment shader #%u variant #%u:\n",
3427 variant
->shader
->no
, variant
->no
);
3428 if (variant
->shader
->base
.type
== PIPE_SHADER_IR_TGSI
)
3429 tgsi_dump(variant
->shader
->base
.tokens
, 0);
3431 nir_print_shader(variant
->shader
->base
.ir
.nir
, stderr
);
3432 dump_fs_variant_key(&variant
->key
);
3433 debug_printf("variant->opaque = %u\n", variant
->opaque
);
3438 lp_fs_get_ir_cache_key(struct lp_fragment_shader_variant
*variant
,
3439 unsigned char ir_sha1_cache_key
[20])
3441 struct blob blob
= { 0 };
3446 nir_serialize(&blob
, variant
->shader
->base
.ir
.nir
, true);
3447 ir_binary
= blob
.data
;
3448 ir_size
= blob
.size
;
3450 struct mesa_sha1 ctx
;
3451 _mesa_sha1_init(&ctx
);
3452 _mesa_sha1_update(&ctx
, &variant
->key
, variant
->shader
->variant_key_size
);
3453 _mesa_sha1_update(&ctx
, ir_binary
, ir_size
);
3454 _mesa_sha1_final(&ctx
, ir_sha1_cache_key
);
3460 * Generate a new fragment shader variant from the shader code and
3461 * other state indicated by the key.
3463 static struct lp_fragment_shader_variant
*
3464 generate_variant(struct llvmpipe_context
*lp
,
3465 struct lp_fragment_shader
*shader
,
3466 const struct lp_fragment_shader_variant_key
*key
)
3468 struct llvmpipe_screen
*screen
= llvmpipe_screen(lp
->pipe
.screen
);
3469 struct lp_fragment_shader_variant
*variant
;
3470 const struct util_format_description
*cbuf0_format_desc
= NULL
;
3471 boolean fullcolormask
;
3472 char module_name
[64];
3473 unsigned char ir_sha1_cache_key
[20];
3474 struct lp_cached_code cached
= { 0 };
3475 bool needs_caching
= false;
3476 variant
= MALLOC(sizeof *variant
+ shader
->variant_key_size
- sizeof variant
->key
);
3480 memset(variant
, 0, sizeof(*variant
));
3481 snprintf(module_name
, sizeof(module_name
), "fs%u_variant%u",
3482 shader
->no
, shader
->variants_created
);
3484 variant
->shader
= shader
;
3485 memcpy(&variant
->key
, key
, shader
->variant_key_size
);
3487 if (shader
->base
.ir
.nir
) {
3488 lp_fs_get_ir_cache_key(variant
, ir_sha1_cache_key
);
3490 lp_disk_cache_find_shader(screen
, &cached
, ir_sha1_cache_key
);
3491 if (!cached
.data_size
)
3492 needs_caching
= true;
3494 variant
->gallivm
= gallivm_create(module_name
, lp
->context
, &cached
);
3495 if (!variant
->gallivm
) {
3500 variant
->list_item_global
.base
= variant
;
3501 variant
->list_item_local
.base
= variant
;
3502 variant
->no
= shader
->variants_created
++;
3507 * Determine whether we are touching all channels in the color buffer.
3509 fullcolormask
= FALSE
;
3510 if (key
->nr_cbufs
== 1) {
3511 cbuf0_format_desc
= util_format_description(key
->cbuf_format
[0]);
3512 fullcolormask
= util_format_colormask_full(cbuf0_format_desc
, key
->blend
.rt
[0].colormask
);
3516 !key
->blend
.logicop_enable
&&
3517 !key
->blend
.rt
[0].blend_enable
&&
3519 !key
->stencil
[0].enabled
&&
3520 !key
->alpha
.enabled
&&
3521 !key
->multisample
&&
3522 !key
->blend
.alpha_to_coverage
&&
3523 !key
->depth
.enabled
&&
3524 !shader
->info
.base
.uses_kill
&&
3525 !shader
->info
.base
.writes_samplemask
3528 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
3529 lp_debug_fs_variant(variant
);
3532 lp_jit_init_types(variant
);
3534 if (variant
->jit_function
[RAST_EDGE_TEST
] == NULL
)
3535 generate_fragment(lp
, shader
, variant
, RAST_EDGE_TEST
);
3537 if (variant
->jit_function
[RAST_WHOLE
] == NULL
) {
3538 if (variant
->opaque
) {
3539 /* Specialized shader, which doesn't need to read the color buffer. */
3540 generate_fragment(lp
, shader
, variant
, RAST_WHOLE
);
3545 * Compile everything
3548 gallivm_compile_module(variant
->gallivm
);
3550 variant
->nr_instrs
+= lp_build_count_ir_module(variant
->gallivm
->module
);
3552 if (variant
->function
[RAST_EDGE_TEST
]) {
3553 variant
->jit_function
[RAST_EDGE_TEST
] = (lp_jit_frag_func
)
3554 gallivm_jit_function(variant
->gallivm
,
3555 variant
->function
[RAST_EDGE_TEST
]);
3558 if (variant
->function
[RAST_WHOLE
]) {
3559 variant
->jit_function
[RAST_WHOLE
] = (lp_jit_frag_func
)
3560 gallivm_jit_function(variant
->gallivm
,
3561 variant
->function
[RAST_WHOLE
]);
3562 } else if (!variant
->jit_function
[RAST_WHOLE
]) {
3563 variant
->jit_function
[RAST_WHOLE
] = variant
->jit_function
[RAST_EDGE_TEST
];
3566 if (needs_caching
) {
3567 lp_disk_cache_insert_shader(screen
, &cached
, ir_sha1_cache_key
);
3570 gallivm_free_ir(variant
->gallivm
);
3577 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
3578 const struct pipe_shader_state
*templ
)
3580 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3581 struct lp_fragment_shader
*shader
;
3583 int nr_sampler_views
;
3587 shader
= CALLOC_STRUCT(lp_fragment_shader
);
3591 shader
->no
= fs_no
++;
3592 make_empty_list(&shader
->variants
);
3594 shader
->base
.type
= templ
->type
;
3595 if (templ
->type
== PIPE_SHADER_IR_TGSI
) {
3596 /* get/save the summary info for this shader */
3597 lp_build_tgsi_info(templ
->tokens
, &shader
->info
);
3599 /* we need to keep a local copy of the tokens */
3600 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
3602 shader
->base
.ir
.nir
= templ
->ir
.nir
;
3603 nir_tgsi_scan_shader(templ
->ir
.nir
, &shader
->info
.base
, true);
3606 shader
->draw_data
= draw_create_fragment_shader(llvmpipe
->draw
, templ
);
3607 if (shader
->draw_data
== NULL
) {
3608 FREE((void *) shader
->base
.tokens
);
3613 nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
3614 nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
3615 nr_images
= shader
->info
.base
.file_max
[TGSI_FILE_IMAGE
] + 1;
3616 shader
->variant_key_size
= lp_fs_variant_key_size(MAX2(nr_samplers
, nr_sampler_views
), nr_images
);
3618 for (i
= 0; i
< shader
->info
.base
.num_inputs
; i
++) {
3619 shader
->inputs
[i
].usage_mask
= shader
->info
.base
.input_usage_mask
[i
];
3620 shader
->inputs
[i
].cyl_wrap
= shader
->info
.base
.input_cylindrical_wrap
[i
];
3621 shader
->inputs
[i
].location
= shader
->info
.base
.input_interpolate_loc
[i
];
3623 switch (shader
->info
.base
.input_interpolate
[i
]) {
3624 case TGSI_INTERPOLATE_CONSTANT
:
3625 shader
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
3627 case TGSI_INTERPOLATE_LINEAR
:
3628 shader
->inputs
[i
].interp
= LP_INTERP_LINEAR
;
3630 case TGSI_INTERPOLATE_PERSPECTIVE
:
3631 shader
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
3633 case TGSI_INTERPOLATE_COLOR
:
3634 shader
->inputs
[i
].interp
= LP_INTERP_COLOR
;
3641 switch (shader
->info
.base
.input_semantic_name
[i
]) {
3642 case TGSI_SEMANTIC_FACE
:
3643 shader
->inputs
[i
].interp
= LP_INTERP_FACING
;
3645 case TGSI_SEMANTIC_POSITION
:
3646 /* Position was already emitted above
3648 shader
->inputs
[i
].interp
= LP_INTERP_POSITION
;
3649 shader
->inputs
[i
].src_index
= 0;
3653 /* XXX this is a completely pointless index map... */
3654 shader
->inputs
[i
].src_index
= i
+1;
3657 if (LP_DEBUG
& DEBUG_TGSI
) {
3659 debug_printf("llvmpipe: Create fragment shader #%u %p:\n",
3660 shader
->no
, (void *) shader
);
3661 tgsi_dump(templ
->tokens
, 0);
3662 debug_printf("usage masks:\n");
3663 for (attrib
= 0; attrib
< shader
->info
.base
.num_inputs
; ++attrib
) {
3664 unsigned usage_mask
= shader
->info
.base
.input_usage_mask
[attrib
];
3665 debug_printf(" IN[%u].%s%s%s%s\n",
3667 usage_mask
& TGSI_WRITEMASK_X
? "x" : "",
3668 usage_mask
& TGSI_WRITEMASK_Y
? "y" : "",
3669 usage_mask
& TGSI_WRITEMASK_Z
? "z" : "",
3670 usage_mask
& TGSI_WRITEMASK_W
? "w" : "");
3680 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
3682 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3683 struct lp_fragment_shader
*lp_fs
= (struct lp_fragment_shader
*)fs
;
3684 if (llvmpipe
->fs
== lp_fs
)
3687 draw_bind_fragment_shader(llvmpipe
->draw
,
3688 (lp_fs
? lp_fs
->draw_data
: NULL
));
3690 llvmpipe
->fs
= lp_fs
;
3692 llvmpipe
->dirty
|= LP_NEW_FS
;
3697 * Remove shader variant from two lists: the shader's variant list
3698 * and the context's variant list.
3701 llvmpipe_remove_shader_variant(struct llvmpipe_context
*lp
,
3702 struct lp_fragment_shader_variant
*variant
)
3704 if ((LP_DEBUG
& DEBUG_FS
) || (gallivm_debug
& GALLIVM_DEBUG_IR
)) {
3705 debug_printf("llvmpipe: del fs #%u var %u v created %u v cached %u "
3706 "v total cached %u inst %u total inst %u\n",
3707 variant
->shader
->no
, variant
->no
,
3708 variant
->shader
->variants_created
,
3709 variant
->shader
->variants_cached
,
3710 lp
->nr_fs_variants
, variant
->nr_instrs
, lp
->nr_fs_instrs
);
3713 gallivm_destroy(variant
->gallivm
);
3715 /* remove from shader's list */
3716 remove_from_list(&variant
->list_item_local
);
3717 variant
->shader
->variants_cached
--;
3719 /* remove from context's list */
3720 remove_from_list(&variant
->list_item_global
);
3721 lp
->nr_fs_variants
--;
3722 lp
->nr_fs_instrs
-= variant
->nr_instrs
;
3729 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
3731 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3732 struct lp_fragment_shader
*shader
= fs
;
3733 struct lp_fs_variant_list_item
*li
;
3735 assert(fs
!= llvmpipe
->fs
);
3738 * XXX: we need to flush the context until we have some sort of reference
3739 * counting in fragment shaders as they may still be binned
3740 * Flushing alone might not sufficient we need to wait on it too.
3742 llvmpipe_finish(pipe
, __FUNCTION__
);
3744 /* Delete all the variants */
3745 li
= first_elem(&shader
->variants
);
3746 while(!at_end(&shader
->variants
, li
)) {
3747 struct lp_fs_variant_list_item
*next
= next_elem(li
);
3748 llvmpipe_remove_shader_variant(llvmpipe
, li
->base
);
3752 /* Delete draw module's data */
3753 draw_delete_fragment_shader(llvmpipe
->draw
, shader
->draw_data
);
3755 if (shader
->base
.ir
.nir
)
3756 ralloc_free(shader
->base
.ir
.nir
);
3757 assert(shader
->variants_cached
== 0);
3758 FREE((void *) shader
->base
.tokens
);
3765 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
3766 enum pipe_shader_type shader
, uint index
,
3767 const struct pipe_constant_buffer
*cb
)
3769 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3770 struct pipe_resource
*constants
= cb
? cb
->buffer
: NULL
;
3772 assert(shader
< PIPE_SHADER_TYPES
);
3773 assert(index
< ARRAY_SIZE(llvmpipe
->constants
[shader
]));
3775 /* note: reference counting */
3776 util_copy_constant_buffer(&llvmpipe
->constants
[shader
][index
], cb
);
3779 if (!(constants
->bind
& PIPE_BIND_CONSTANT_BUFFER
)) {
3780 debug_printf("Illegal set constant without bind flag\n");
3781 constants
->bind
|= PIPE_BIND_CONSTANT_BUFFER
;
3785 if (shader
== PIPE_SHADER_VERTEX
||
3786 shader
== PIPE_SHADER_GEOMETRY
||
3787 shader
== PIPE_SHADER_TESS_CTRL
||
3788 shader
== PIPE_SHADER_TESS_EVAL
) {
3789 /* Pass the constants to the 'draw' module */
3790 const unsigned size
= cb
? cb
->buffer_size
: 0;
3794 data
= (ubyte
*) llvmpipe_resource_data(constants
);
3796 else if (cb
&& cb
->user_buffer
) {
3797 data
= (ubyte
*) cb
->user_buffer
;
3804 data
+= cb
->buffer_offset
;
3806 draw_set_mapped_constant_buffer(llvmpipe
->draw
, shader
,
3809 else if (shader
== PIPE_SHADER_COMPUTE
)
3810 llvmpipe
->cs_dirty
|= LP_CSNEW_CONSTANTS
;
3812 llvmpipe
->dirty
|= LP_NEW_FS_CONSTANTS
;
3814 if (cb
&& cb
->user_buffer
) {
3815 pipe_resource_reference(&constants
, NULL
);
3820 llvmpipe_set_shader_buffers(struct pipe_context
*pipe
,
3821 enum pipe_shader_type shader
, unsigned start_slot
,
3822 unsigned count
, const struct pipe_shader_buffer
*buffers
,
3823 unsigned writable_bitmask
)
3825 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3827 for (i
= start_slot
, idx
= 0; i
< start_slot
+ count
; i
++, idx
++) {
3828 const struct pipe_shader_buffer
*buffer
= buffers
? &buffers
[idx
] : NULL
;
3830 util_copy_shader_buffer(&llvmpipe
->ssbos
[shader
][i
], buffer
);
3832 if (shader
== PIPE_SHADER_VERTEX
||
3833 shader
== PIPE_SHADER_GEOMETRY
||
3834 shader
== PIPE_SHADER_TESS_CTRL
||
3835 shader
== PIPE_SHADER_TESS_EVAL
) {
3836 const unsigned size
= buffer
? buffer
->buffer_size
: 0;
3837 const ubyte
*data
= NULL
;
3838 if (buffer
&& buffer
->buffer
)
3839 data
= (ubyte
*) llvmpipe_resource_data(buffer
->buffer
);
3841 data
+= buffer
->buffer_offset
;
3842 draw_set_mapped_shader_buffer(llvmpipe
->draw
, shader
,
3844 } else if (shader
== PIPE_SHADER_COMPUTE
) {
3845 llvmpipe
->cs_dirty
|= LP_CSNEW_SSBOS
;
3846 } else if (shader
== PIPE_SHADER_FRAGMENT
) {
3847 llvmpipe
->dirty
|= LP_NEW_FS_SSBOS
;
3853 llvmpipe_set_shader_images(struct pipe_context
*pipe
,
3854 enum pipe_shader_type shader
, unsigned start_slot
,
3855 unsigned count
, const struct pipe_image_view
*images
)
3857 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
3860 draw_flush(llvmpipe
->draw
);
3861 for (i
= start_slot
, idx
= 0; i
< start_slot
+ count
; i
++, idx
++) {
3862 const struct pipe_image_view
*image
= images
? &images
[idx
] : NULL
;
3864 util_copy_image_view(&llvmpipe
->images
[shader
][i
], image
);
3867 llvmpipe
->num_images
[shader
] = start_slot
+ count
;
3868 if (shader
== PIPE_SHADER_VERTEX
||
3869 shader
== PIPE_SHADER_GEOMETRY
||
3870 shader
== PIPE_SHADER_TESS_CTRL
||
3871 shader
== PIPE_SHADER_TESS_EVAL
) {
3872 draw_set_images(llvmpipe
->draw
,
3874 llvmpipe
->images
[shader
],
3875 start_slot
+ count
);
3876 } else if (shader
== PIPE_SHADER_COMPUTE
)
3877 llvmpipe
->cs_dirty
|= LP_CSNEW_IMAGES
;
3879 llvmpipe
->dirty
|= LP_NEW_FS_IMAGES
;
3883 * Return the blend factor equivalent to a destination alpha of one.
3885 static inline unsigned
3886 force_dst_alpha_one(unsigned factor
, boolean clamped_zero
)
3889 case PIPE_BLENDFACTOR_DST_ALPHA
:
3890 return PIPE_BLENDFACTOR_ONE
;
3891 case PIPE_BLENDFACTOR_INV_DST_ALPHA
:
3892 return PIPE_BLENDFACTOR_ZERO
;
3893 case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
:
3895 return PIPE_BLENDFACTOR_ZERO
;
3897 return PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE
;
3905 * We need to generate several variants of the fragment pipeline to match
3906 * all the combinations of the contributing state atoms.
3908 * TODO: there is actually no reason to tie this to context state -- the
3909 * generated code could be cached globally in the screen.
3911 static struct lp_fragment_shader_variant_key
*
3912 make_variant_key(struct llvmpipe_context
*lp
,
3913 struct lp_fragment_shader
*shader
,
3917 struct lp_fragment_shader_variant_key
*key
;
3919 key
= (struct lp_fragment_shader_variant_key
*)store
;
3921 memset(key
, 0, offsetof(struct lp_fragment_shader_variant_key
, samplers
[1]));
3923 if (lp
->framebuffer
.zsbuf
) {
3924 enum pipe_format zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
3925 const struct util_format_description
*zsbuf_desc
=
3926 util_format_description(zsbuf_format
);
3928 if (lp
->depth_stencil
->depth
.enabled
&&
3929 util_format_has_depth(zsbuf_desc
)) {
3930 key
->zsbuf_format
= zsbuf_format
;
3931 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
3933 if (lp
->depth_stencil
->stencil
[0].enabled
&&
3934 util_format_has_stencil(zsbuf_desc
)) {
3935 key
->zsbuf_format
= zsbuf_format
;
3936 memcpy(&key
->stencil
, &lp
->depth_stencil
->stencil
, sizeof key
->stencil
);
3938 if (llvmpipe_resource_is_1d(lp
->framebuffer
.zsbuf
->texture
)) {
3939 key
->resource_1d
= TRUE
;
3941 key
->zsbuf_nr_samples
= util_res_sample_count(lp
->framebuffer
.zsbuf
->texture
);
3945 * Propagate the depth clamp setting from the rasterizer state.
3946 * depth_clip == 0 implies depth clamping is enabled.
3948 * When clip_halfz is enabled, then always clamp the depth values.
3950 * XXX: This is incorrect for GL, but correct for d3d10 (depth
3951 * clamp is always active in d3d10, regardless if depth clip is
3953 * (GL has an always-on [0,1] clamp on fs depth output instead
3954 * to ensure the depth values stay in range. Doesn't look like
3955 * we do that, though...)
3957 if (lp
->rasterizer
->clip_halfz
) {
3958 key
->depth_clamp
= 1;
3960 key
->depth_clamp
= (lp
->rasterizer
->depth_clip_near
== 0) ? 1 : 0;
3963 /* alpha test only applies if render buffer 0 is non-integer (or does not exist) */
3964 if (!lp
->framebuffer
.nr_cbufs
||
3965 !lp
->framebuffer
.cbufs
[0] ||
3966 !util_format_is_pure_integer(lp
->framebuffer
.cbufs
[0]->format
)) {
3967 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
3969 if(key
->alpha
.enabled
)
3970 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
3971 /* alpha.ref_value is passed in jit_context */
3973 key
->flatshade
= lp
->rasterizer
->flatshade
;
3974 key
->multisample
= lp
->rasterizer
->multisample
;
3975 if (lp
->active_occlusion_queries
&& !lp
->queries_disabled
) {
3976 key
->occlusion_count
= TRUE
;
3979 if (lp
->framebuffer
.nr_cbufs
) {
3980 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
3983 key
->coverage_samples
= 1;
3984 key
->min_samples
= 1;
3985 if (key
->multisample
) {
3986 key
->coverage_samples
= util_framebuffer_get_num_samples(&lp
->framebuffer
);
3987 key
->min_samples
= lp
->min_samples
== 1 ? 1 : key
->coverage_samples
;
3989 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
3991 if (!key
->blend
.independent_blend_enable
) {
3992 /* we always need independent blend otherwise the fixups below won't work */
3993 for (i
= 1; i
< key
->nr_cbufs
; i
++) {
3994 memcpy(&key
->blend
.rt
[i
], &key
->blend
.rt
[0], sizeof(key
->blend
.rt
[0]));
3996 key
->blend
.independent_blend_enable
= 1;
3999 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
4000 struct pipe_rt_blend_state
*blend_rt
= &key
->blend
.rt
[i
];
4002 if (lp
->framebuffer
.cbufs
[i
]) {
4003 enum pipe_format format
= lp
->framebuffer
.cbufs
[i
]->format
;
4004 const struct util_format_description
*format_desc
;
4006 key
->cbuf_format
[i
] = format
;
4007 key
->cbuf_nr_samples
[i
] = util_res_sample_count(lp
->framebuffer
.cbufs
[i
]->texture
);
4010 * Figure out if this is a 1d resource. Note that OpenGL allows crazy
4011 * mixing of 2d textures with height 1 and 1d textures, so make sure
4012 * we pick 1d if any cbuf or zsbuf is 1d.
4014 if (llvmpipe_resource_is_1d(lp
->framebuffer
.cbufs
[i
]->texture
)) {
4015 key
->resource_1d
= TRUE
;
4018 format_desc
= util_format_description(format
);
4019 assert(format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_RGB
||
4020 format_desc
->colorspace
== UTIL_FORMAT_COLORSPACE_SRGB
);
4023 * Mask out color channels not present in the color buffer.
4025 blend_rt
->colormask
&= util_format_colormask(format_desc
);
4028 * Disable blend for integer formats.
4030 if (util_format_is_pure_integer(format
)) {
4031 blend_rt
->blend_enable
= 0;
4035 * Our swizzled render tiles always have an alpha channel, but the
4036 * linear render target format often does not, so force here the dst
4039 * This is not a mere optimization. Wrong results will be produced if
4040 * the dst alpha is used, the dst format does not have alpha, and the
4041 * previous rendering was not flushed from the swizzled to linear
4042 * buffer. For example, NonPowTwo DCT.
4044 * TODO: This should be generalized to all channels for better
4045 * performance, but only alpha causes correctness issues.
4047 * Also, force rgb/alpha func/factors match, to make AoS blending
4050 if (format_desc
->swizzle
[3] > PIPE_SWIZZLE_W
||
4051 format_desc
->swizzle
[3] == format_desc
->swizzle
[0]) {
4052 /* Doesn't cover mixed snorm/unorm but can't render to them anyway */
4053 boolean clamped_zero
= !util_format_is_float(format
) &&
4054 !util_format_is_snorm(format
);
4055 blend_rt
->rgb_src_factor
=
4056 force_dst_alpha_one(blend_rt
->rgb_src_factor
, clamped_zero
);
4057 blend_rt
->rgb_dst_factor
=
4058 force_dst_alpha_one(blend_rt
->rgb_dst_factor
, clamped_zero
);
4059 blend_rt
->alpha_func
= blend_rt
->rgb_func
;
4060 blend_rt
->alpha_src_factor
= blend_rt
->rgb_src_factor
;
4061 blend_rt
->alpha_dst_factor
= blend_rt
->rgb_dst_factor
;
4065 /* no color buffer for this fragment output */
4066 key
->cbuf_format
[i
] = PIPE_FORMAT_NONE
;
4067 key
->cbuf_nr_samples
[i
] = 0;
4068 blend_rt
->colormask
= 0x0;
4069 blend_rt
->blend_enable
= 0;
4073 /* This value will be the same for all the variants of a given shader:
4075 key
->nr_samplers
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER
] + 1;
4077 struct lp_sampler_static_state
*fs_sampler
;
4079 fs_sampler
= key
->samplers
;
4081 memset(fs_sampler
, 0, MAX2(key
->nr_samplers
, key
->nr_sampler_views
) * sizeof *fs_sampler
);
4083 for(i
= 0; i
< key
->nr_samplers
; ++i
) {
4084 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
4085 lp_sampler_static_sampler_state(&fs_sampler
[i
].sampler_state
,
4086 lp
->samplers
[PIPE_SHADER_FRAGMENT
][i
]);
4091 * XXX If TGSI_FILE_SAMPLER_VIEW exists assume all texture opcodes
4092 * are dx10-style? Can't really have mixed opcodes, at least not
4093 * if we want to skip the holes here (without rescanning tgsi).
4095 if (shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] != -1) {
4096 key
->nr_sampler_views
= shader
->info
.base
.file_max
[TGSI_FILE_SAMPLER_VIEW
] + 1;
4097 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
4099 * Note sview may exceed what's representable by file_mask.
4100 * This will still work, the only downside is that not actually
4101 * used views may be included in the shader key.
4103 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER_VIEW
] & (1u << (i
& 31))) {
4104 lp_sampler_static_texture_state(&fs_sampler
[i
].texture_state
,
4105 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
4110 key
->nr_sampler_views
= key
->nr_samplers
;
4111 for(i
= 0; i
< key
->nr_sampler_views
; ++i
) {
4112 if(shader
->info
.base
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
)) {
4113 lp_sampler_static_texture_state(&fs_sampler
[i
].texture_state
,
4114 lp
->sampler_views
[PIPE_SHADER_FRAGMENT
][i
]);
4119 struct lp_image_static_state
*lp_image
;
4120 lp_image
= lp_fs_variant_key_images(key
);
4121 key
->nr_images
= shader
->info
.base
.file_max
[TGSI_FILE_IMAGE
] + 1;
4122 for (i
= 0; i
< key
->nr_images
; ++i
) {
4123 if (shader
->info
.base
.file_mask
[TGSI_FILE_IMAGE
] & (1 << i
)) {
4124 lp_sampler_static_texture_state_image(&lp_image
[i
].image_state
,
4125 &lp
->images
[PIPE_SHADER_FRAGMENT
][i
]);
4134 * Update fragment shader state. This is called just prior to drawing
4135 * something when some fragment-related state has changed.
4138 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
4140 struct lp_fragment_shader
*shader
= lp
->fs
;
4141 struct lp_fragment_shader_variant_key
*key
;
4142 struct lp_fragment_shader_variant
*variant
= NULL
;
4143 struct lp_fs_variant_list_item
*li
;
4144 char store
[LP_FS_MAX_VARIANT_KEY_SIZE
];
4146 key
= make_variant_key(lp
, shader
, store
);
4148 /* Search the variants for one which matches the key */
4149 li
= first_elem(&shader
->variants
);
4150 while(!at_end(&shader
->variants
, li
)) {
4151 if(memcmp(&li
->base
->key
, key
, shader
->variant_key_size
) == 0) {
4159 /* Move this variant to the head of the list to implement LRU
4160 * deletion of shader's when we have too many.
4162 move_to_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
4165 /* variant not found, create it now */
4168 unsigned variants_to_cull
;
4170 if (LP_DEBUG
& DEBUG_FS
) {
4171 debug_printf("%u variants,\t%u instrs,\t%u instrs/variant\n",
4174 lp
->nr_fs_variants
? lp
->nr_fs_instrs
/ lp
->nr_fs_variants
: 0);
4177 /* First, check if we've exceeded the max number of shader variants.
4178 * If so, free 6.25% of them (the least recently used ones).
4180 variants_to_cull
= lp
->nr_fs_variants
>= LP_MAX_SHADER_VARIANTS
? LP_MAX_SHADER_VARIANTS
/ 16 : 0;
4182 if (variants_to_cull
||
4183 lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
) {
4184 struct pipe_context
*pipe
= &lp
->pipe
;
4186 if (gallivm_debug
& GALLIVM_DEBUG_PERF
) {
4187 debug_printf("Evicting FS: %u fs variants,\t%u total variants,"
4188 "\t%u instrs,\t%u instrs/variant\n",
4189 shader
->variants_cached
,
4190 lp
->nr_fs_variants
, lp
->nr_fs_instrs
,
4191 lp
->nr_fs_instrs
/ lp
->nr_fs_variants
);
4195 * XXX: we need to flush the context until we have some sort of
4196 * reference counting in fragment shaders as they may still be binned
4197 * Flushing alone might not be sufficient we need to wait on it too.
4199 llvmpipe_finish(pipe
, __FUNCTION__
);
4202 * We need to re-check lp->nr_fs_variants because an arbitrarliy large
4203 * number of shader variants (potentially all of them) could be
4204 * pending for destruction on flush.
4207 for (i
= 0; i
< variants_to_cull
|| lp
->nr_fs_instrs
>= LP_MAX_SHADER_INSTRUCTIONS
; i
++) {
4208 struct lp_fs_variant_list_item
*item
;
4209 if (is_empty_list(&lp
->fs_variants_list
)) {
4212 item
= last_elem(&lp
->fs_variants_list
);
4215 llvmpipe_remove_shader_variant(lp
, item
->base
);
4220 * Generate the new variant.
4223 variant
= generate_variant(lp
, shader
, key
);
4226 LP_COUNT_ADD(llvm_compile_time
, dt
);
4227 LP_COUNT_ADD(nr_llvm_compiles
, 2); /* emit vs. omit in/out test */
4229 /* Put the new variant into the list */
4231 insert_at_head(&shader
->variants
, &variant
->list_item_local
);
4232 insert_at_head(&lp
->fs_variants_list
, &variant
->list_item_global
);
4233 lp
->nr_fs_variants
++;
4234 lp
->nr_fs_instrs
+= variant
->nr_instrs
;
4235 shader
->variants_cached
++;
4239 /* Bind this variant */
4240 lp_setup_set_fs_variant(lp
->setup
, variant
);
4248 llvmpipe_init_fs_funcs(struct llvmpipe_context
*llvmpipe
)
4250 llvmpipe
->pipe
.create_fs_state
= llvmpipe_create_fs_state
;
4251 llvmpipe
->pipe
.bind_fs_state
= llvmpipe_bind_fs_state
;
4252 llvmpipe
->pipe
.delete_fs_state
= llvmpipe_delete_fs_state
;
4254 llvmpipe
->pipe
.set_constant_buffer
= llvmpipe_set_constant_buffer
;
4256 llvmpipe
->pipe
.set_shader_buffers
= llvmpipe_set_shader_buffers
;
4257 llvmpipe
->pipe
.set_shader_images
= llvmpipe_set_shader_images
;