1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
4 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
31 * Code generate the whole fragment pipeline.
33 * The fragment pipeline consists of the following stages:
38 * - depth/stencil test (stencil TBI)
41 * This file has only the glue to assembly the fragment pipeline. The actual
42 * plumbing of converting Gallium state into LLVM IR is done elsewhere, in the
43 * lp_bld_*.[ch] files, and in a complete generic and reusable way. Here we
44 * muster the LLVM JIT execution engine to create a function that follows an
45 * established binary interface and that can be called from C directly.
47 * A big source of complexity here is that we often want to run different
48 * stages with different precisions and data types and precisions. For example,
49 * the fragment shader needs typically to be done in floats, but the
50 * depth/stencil test and blending is better done in the type that most closely
51 * matches the depth/stencil and color buffer respectively.
53 * Since the width of a SIMD vector register stays the same regardless of the
54 * element type, different types imply different number of elements, so we must
55 * code generate more instances of the stages with larger types to be able to
56 * feed/consume the stages with smaller types.
58 * @author Jose Fonseca <jfonseca@vmware.com>
62 #include "pipe/p_defines.h"
63 #include "util/u_memory.h"
64 #include "util/u_format.h"
65 #include "util/u_debug_dump.h"
66 #include "pipe/internal/p_winsys_screen.h"
67 #include "pipe/p_shader_tokens.h"
68 #include "draw/draw_context.h"
69 #include "tgsi/tgsi_dump.h"
70 #include "tgsi/tgsi_scan.h"
71 #include "tgsi/tgsi_parse.h"
72 #include "lp_bld_type.h"
73 #include "lp_bld_const.h"
74 #include "lp_bld_conv.h"
75 #include "lp_bld_intr.h"
76 #include "lp_bld_logic.h"
77 #include "lp_bld_depth.h"
78 #include "lp_bld_interp.h"
79 #include "lp_bld_tgsi.h"
80 #include "lp_bld_alpha.h"
81 #include "lp_bld_blend.h"
82 #include "lp_bld_swizzle.h"
83 #include "lp_bld_flow.h"
84 #include "lp_bld_debug.h"
85 #include "lp_screen.h"
86 #include "lp_context.h"
87 #include "lp_buffer.h"
90 #include "lp_tex_sample.h"
94 static const unsigned char quad_offset_x
[4] = {0, 1, 0, 1};
95 static const unsigned char quad_offset_y
[4] = {0, 0, 1, 1};
99 * Derive from the quad's upper left scalar coordinates the coordinates for
100 * all other quad pixels
103 generate_pos0(LLVMBuilderRef builder
,
109 LLVMTypeRef int_elem_type
= LLVMInt32Type();
110 LLVMTypeRef int_vec_type
= LLVMVectorType(int_elem_type
, QUAD_SIZE
);
111 LLVMTypeRef elem_type
= LLVMFloatType();
112 LLVMTypeRef vec_type
= LLVMVectorType(elem_type
, QUAD_SIZE
);
113 LLVMValueRef x_offsets
[QUAD_SIZE
];
114 LLVMValueRef y_offsets
[QUAD_SIZE
];
117 x
= lp_build_broadcast(builder
, int_vec_type
, x
);
118 y
= lp_build_broadcast(builder
, int_vec_type
, y
);
120 for(i
= 0; i
< QUAD_SIZE
; ++i
) {
121 x_offsets
[i
] = LLVMConstInt(int_elem_type
, quad_offset_x
[i
], 0);
122 y_offsets
[i
] = LLVMConstInt(int_elem_type
, quad_offset_y
[i
], 0);
125 x
= LLVMBuildAdd(builder
, x
, LLVMConstVector(x_offsets
, QUAD_SIZE
), "");
126 y
= LLVMBuildAdd(builder
, y
, LLVMConstVector(y_offsets
, QUAD_SIZE
), "");
128 *x0
= LLVMBuildSIToFP(builder
, x
, vec_type
, "");
129 *y0
= LLVMBuildSIToFP(builder
, y
, vec_type
, "");
134 * Generate the depth test.
137 generate_depth(LLVMBuilderRef builder
,
138 const struct lp_fragment_shader_variant_key
*key
,
139 struct lp_type src_type
,
140 struct lp_build_mask_context
*mask
,
142 LLVMValueRef dst_ptr
)
144 const struct util_format_description
*format_desc
;
145 struct lp_type dst_type
;
147 if(!key
->depth
.enabled
)
150 format_desc
= util_format_description(key
->zsbuf_format
);
154 * Depths are expected to be between 0 and 1, even if they are stored in
155 * floats. Setting these bits here will ensure that the lp_build_conv() call
156 * below won't try to unnecessarily clamp the incoming values.
158 if(src_type
.floating
) {
159 src_type
.sign
= FALSE
;
160 src_type
.norm
= TRUE
;
163 assert(!src_type
.sign
);
164 assert(src_type
.norm
);
167 /* Pick the depth type. */
168 dst_type
= lp_depth_type(format_desc
, src_type
.width
*src_type
.length
);
170 /* FIXME: Cope with a depth test type with a different bit width. */
171 assert(dst_type
.width
== src_type
.width
);
172 assert(dst_type
.length
== src_type
.length
);
174 lp_build_conv(builder
, src_type
, dst_type
, &src
, 1, &src
, 1);
176 dst_ptr
= LLVMBuildBitCast(builder
,
178 LLVMPointerType(lp_build_vec_type(dst_type
), 0), "");
180 lp_build_depth_test(builder
,
191 * Generate the code to do inside/outside triangle testing for the
192 * four pixels in a 2x2 quad. This will set the four elements of the
193 * quad mask vector to 0 or ~0.
194 * \param i which quad of the quad group to test, in [0,3]
197 generate_tri_edge_mask(LLVMBuilderRef builder
,
199 LLVMValueRef
*mask
, /* ivec4, out */
200 LLVMValueRef c0
, /* int32 */
201 LLVMValueRef c1
, /* int32 */
202 LLVMValueRef c2
, /* int32 */
203 LLVMValueRef step0_ptr
, /* ivec4 */
204 LLVMValueRef step1_ptr
, /* ivec4 */
205 LLVMValueRef step2_ptr
) /* ivec4 */
207 #define OPTIMIZE_IN_OUT_TEST 0
208 #if OPTIMIZE_IN_OUT_TEST
209 struct lp_build_if_state ifctx
;
210 LLVMValueRef not_draw_all
;
212 struct lp_build_flow_context
*flow
;
213 struct lp_type i32_type
;
214 LLVMTypeRef i32vec4_type
, mask_type
;
215 LLVMValueRef c0_vec
, c1_vec
, c2_vec
;
216 LLVMValueRef in_out_mask
;
220 /* int32 vector type */
221 memset(&i32_type
, 0, sizeof i32_type
);
222 i32_type
.floating
= FALSE
; /* values are integers */
223 i32_type
.sign
= TRUE
; /* values are signed */
224 i32_type
.norm
= FALSE
; /* values are not normalized */
225 i32_type
.width
= 32; /* 32-bit int values */
226 i32_type
.length
= 4; /* 4 elements per vector */
228 i32vec4_type
= lp_build_int32_vec4_type();
230 mask_type
= LLVMIntType(32 * 4);
233 * Use a conditional here to do detailed pixel in/out testing.
234 * We only have to do this if c0 != INT_MIN.
236 flow
= lp_build_flow_create(builder
);
237 lp_build_flow_scope_begin(flow
);
240 #if OPTIMIZE_IN_OUT_TEST
241 /* not_draw_all = (c0 != INT_MIN) */
242 not_draw_all
= LLVMBuildICmp(builder
,
245 LLVMConstInt(LLVMInt32Type(), INT_MIN
, 0),
248 in_out_mask
= lp_build_int_const_scalar(i32_type
, ~0);
251 lp_build_flow_scope_declare(flow
, &in_out_mask
);
253 /* if (not_draw_all) {... */
254 lp_build_if(&ifctx
, flow
, builder
, not_draw_all
);
257 LLVMValueRef step0_vec
, step1_vec
, step2_vec
;
258 LLVMValueRef m0_vec
, m1_vec
, m2_vec
;
259 LLVMValueRef index
, m
;
261 /* c0_vec = {c0, c0, c0, c0}
262 * Note that we emit this code four times but LLVM optimizes away
263 * three instances of it.
265 c0_vec
= lp_build_broadcast(builder
, i32vec4_type
, c0
);
266 c1_vec
= lp_build_broadcast(builder
, i32vec4_type
, c1
);
267 c2_vec
= lp_build_broadcast(builder
, i32vec4_type
, c2
);
268 lp_build_name(c0_vec
, "edgeconst0vec");
269 lp_build_name(c1_vec
, "edgeconst1vec");
270 lp_build_name(c2_vec
, "edgeconst2vec");
272 /* load step0vec, step1, step2 vec from memory */
273 index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
274 step0_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step0_ptr
, &index
, 1, ""), "");
275 step1_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step1_ptr
, &index
, 1, ""), "");
276 step2_vec
= LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, step2_ptr
, &index
, 1, ""), "");
277 lp_build_name(step0_vec
, "step0vec");
278 lp_build_name(step1_vec
, "step1vec");
279 lp_build_name(step2_vec
, "step2vec");
281 /* m0_vec = step0_ptr[i] > c0_vec */
282 m0_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step0_vec
, c0_vec
);
283 m1_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step1_vec
, c1_vec
);
284 m2_vec
= lp_build_compare(builder
, i32_type
, PIPE_FUNC_GREATER
, step2_vec
, c2_vec
);
286 /* in_out_mask = m0_vec & m1_vec & m2_vec */
287 m
= LLVMBuildAnd(builder
, m0_vec
, m1_vec
, "");
288 in_out_mask
= LLVMBuildAnd(builder
, m
, m2_vec
, "");
289 lp_build_name(in_out_mask
, "inoutmaskvec");
291 #if OPTIMIZE_IN_OUT_TEST
292 lp_build_endif(&ifctx
);
296 lp_build_flow_scope_end(flow
);
297 lp_build_flow_destroy(flow
);
299 /* This is the initial alive/dead pixel mask for a quad of four pixels.
300 * It's an int[4] vector with each word set to 0 or ~0.
301 * Words will get cleared when pixels faile the Z test, etc.
308 generate_scissor_test(LLVMBuilderRef builder
,
309 LLVMValueRef context_ptr
,
310 const struct lp_build_interp_soa_context
*interp
,
313 LLVMTypeRef vec_type
= lp_build_vec_type(type
);
314 LLVMValueRef xpos
= interp
->pos
[0], ypos
= interp
->pos
[1];
315 LLVMValueRef xmin
, ymin
, xmax
, ymax
;
316 LLVMValueRef m0
, m1
, m2
, m3
, m
;
318 /* xpos, ypos contain the window coords for the four pixels in the quad */
322 /* get the current scissor bounds, convert to vectors */
323 xmin
= lp_jit_context_scissor_xmin_value(builder
, context_ptr
);
324 xmin
= lp_build_broadcast(builder
, vec_type
, xmin
);
326 ymin
= lp_jit_context_scissor_ymin_value(builder
, context_ptr
);
327 ymin
= lp_build_broadcast(builder
, vec_type
, ymin
);
329 xmax
= lp_jit_context_scissor_xmax_value(builder
, context_ptr
);
330 xmax
= lp_build_broadcast(builder
, vec_type
, xmax
);
332 ymax
= lp_jit_context_scissor_ymax_value(builder
, context_ptr
);
333 ymax
= lp_build_broadcast(builder
, vec_type
, ymax
);
335 /* compare the fragment's position coordinates against the scissor bounds */
336 m0
= lp_build_compare(builder
, type
, PIPE_FUNC_GEQUAL
, xpos
, xmin
);
337 m1
= lp_build_compare(builder
, type
, PIPE_FUNC_GEQUAL
, ypos
, ymin
);
338 m2
= lp_build_compare(builder
, type
, PIPE_FUNC_LESS
, xpos
, xmax
);
339 m3
= lp_build_compare(builder
, type
, PIPE_FUNC_LESS
, ypos
, ymax
);
341 /* AND all the masks together */
342 m
= LLVMBuildAnd(builder
, m0
, m1
, "");
343 m
= LLVMBuildAnd(builder
, m
, m2
, "");
344 m
= LLVMBuildAnd(builder
, m
, m3
, "");
346 lp_build_name(m
, "scissormask");
353 * Generate the fragment shader, depth/stencil test, and alpha tests.
354 * \param i which quad in the tile, in range [0,3]
357 generate_fs(struct llvmpipe_context
*lp
,
358 struct lp_fragment_shader
*shader
,
359 const struct lp_fragment_shader_variant_key
*key
,
360 LLVMBuilderRef builder
,
362 LLVMValueRef context_ptr
,
364 const struct lp_build_interp_soa_context
*interp
,
365 struct lp_build_sampler_soa
*sampler
,
367 LLVMValueRef (*color
)[4],
368 LLVMValueRef depth_ptr
,
372 LLVMValueRef step0_ptr
,
373 LLVMValueRef step1_ptr
,
374 LLVMValueRef step2_ptr
)
376 const struct tgsi_token
*tokens
= shader
->base
.tokens
;
377 LLVMTypeRef elem_type
;
378 LLVMTypeRef vec_type
;
379 LLVMTypeRef int_vec_type
;
380 LLVMValueRef consts_ptr
;
381 LLVMValueRef outputs
[PIPE_MAX_SHADER_OUTPUTS
][NUM_CHANNELS
];
382 LLVMValueRef z
= interp
->pos
[2];
383 struct lp_build_flow_context
*flow
;
384 struct lp_build_mask_context mask
;
385 boolean early_depth_test
;
392 elem_type
= lp_build_elem_type(type
);
393 vec_type
= lp_build_vec_type(type
);
394 int_vec_type
= lp_build_int_vec_type(type
);
396 consts_ptr
= lp_jit_context_constants(builder
, context_ptr
);
398 flow
= lp_build_flow_create(builder
);
400 memset(outputs
, 0, sizeof outputs
);
402 lp_build_flow_scope_begin(flow
);
404 /* Declare the color and z variables */
405 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
406 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
407 color
[cbuf
][chan
] = LLVMGetUndef(vec_type
);
408 lp_build_flow_scope_declare(flow
, &color
[cbuf
][chan
]);
411 lp_build_flow_scope_declare(flow
, &z
);
413 /* do triangle edge testing */
414 generate_tri_edge_mask(builder
, i
, pmask
,
415 c0
, c1
, c2
, step0_ptr
, step1_ptr
, step2_ptr
);
417 /* 'mask' will control execution based on quad's pixel alive/killed state */
418 lp_build_mask_begin(&mask
, flow
, type
, *pmask
);
422 generate_scissor_test(builder
, context_ptr
, interp
, type
);
423 lp_build_mask_update(&mask
, smask
);
427 key
->depth
.enabled
&&
428 !key
->alpha
.enabled
&&
429 !shader
->info
.uses_kill
&&
430 !shader
->info
.writes_z
;
433 generate_depth(builder
, key
,
437 lp_build_tgsi_soa(builder
, tokens
, type
, &mask
,
438 consts_ptr
, interp
->pos
, interp
->inputs
,
441 for (attrib
= 0; attrib
< shader
->info
.num_outputs
; ++attrib
) {
442 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
443 if(outputs
[attrib
][chan
]) {
444 lp_build_name(outputs
[attrib
][chan
], "output%u.%u.%c", i
, attrib
, "xyzw"[chan
]);
446 switch (shader
->info
.output_semantic_name
[attrib
]) {
447 case TGSI_SEMANTIC_COLOR
:
449 unsigned cbuf
= shader
->info
.output_semantic_index
[attrib
];
451 lp_build_name(outputs
[attrib
][chan
], "color%u.%u.%c", i
, attrib
, "rgba"[chan
]);
454 /* XXX: should the alpha reference value be passed separately? */
455 /* XXX: should only test the final assignment to alpha */
456 if(cbuf
== 0 && chan
== 3) {
457 LLVMValueRef alpha
= outputs
[attrib
][chan
];
458 LLVMValueRef alpha_ref_value
;
459 alpha_ref_value
= lp_jit_context_alpha_ref_value(builder
, context_ptr
);
460 alpha_ref_value
= lp_build_broadcast(builder
, vec_type
, alpha_ref_value
);
461 lp_build_alpha_test(builder
, &key
->alpha
, type
,
462 &mask
, alpha
, alpha_ref_value
);
465 color
[cbuf
][chan
] = outputs
[attrib
][chan
];
469 case TGSI_SEMANTIC_POSITION
:
471 z
= outputs
[attrib
][chan
];
478 if(!early_depth_test
)
479 generate_depth(builder
, key
,
483 lp_build_mask_end(&mask
);
485 lp_build_flow_scope_end(flow
);
487 lp_build_flow_destroy(flow
);
495 * Generate color blending and color output.
498 generate_blend(const struct pipe_blend_state
*blend
,
499 LLVMBuilderRef builder
,
501 LLVMValueRef context_ptr
,
504 LLVMValueRef dst_ptr
)
506 struct lp_build_context bld
;
507 struct lp_build_flow_context
*flow
;
508 struct lp_build_mask_context mask_ctx
;
509 LLVMTypeRef vec_type
;
510 LLVMTypeRef int_vec_type
;
511 LLVMValueRef const_ptr
;
517 lp_build_context_init(&bld
, builder
, type
);
519 flow
= lp_build_flow_create(builder
);
521 /* we'll use this mask context to skip blending if all pixels are dead */
522 lp_build_mask_begin(&mask_ctx
, flow
, type
, mask
);
524 vec_type
= lp_build_vec_type(type
);
525 int_vec_type
= lp_build_int_vec_type(type
);
527 const_ptr
= lp_jit_context_blend_color(builder
, context_ptr
);
528 const_ptr
= LLVMBuildBitCast(builder
, const_ptr
,
529 LLVMPointerType(vec_type
, 0), "");
531 for(chan
= 0; chan
< 4; ++chan
) {
532 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
533 con
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, const_ptr
, &index
, 1, ""), "");
535 dst
[chan
] = LLVMBuildLoad(builder
, LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""), "");
537 lp_build_name(con
[chan
], "con.%c", "rgba"[chan
]);
538 lp_build_name(dst
[chan
], "dst.%c", "rgba"[chan
]);
541 lp_build_blend_soa(builder
, blend
, type
, src
, dst
, con
, res
);
543 for(chan
= 0; chan
< 4; ++chan
) {
544 if(blend
->colormask
& (1 << chan
)) {
545 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), chan
, 0);
546 lp_build_name(res
[chan
], "res.%c", "rgba"[chan
]);
547 res
[chan
] = lp_build_select(&bld
, mask
, res
[chan
], dst
[chan
]);
548 LLVMBuildStore(builder
, res
[chan
], LLVMBuildGEP(builder
, dst_ptr
, &index
, 1, ""));
552 lp_build_mask_end(&mask_ctx
);
553 lp_build_flow_destroy(flow
);
558 * Generate the runtime callable function for the whole fragment pipeline.
559 * Note that the function which we generate operates on a block of 16
560 * pixels at at time. The block contains 2x2 quads. Each quad contains
564 generate_fragment(struct llvmpipe_context
*lp
,
565 struct lp_fragment_shader
*shader
,
566 struct lp_fragment_shader_variant
*variant
)
568 struct llvmpipe_screen
*screen
= llvmpipe_screen(lp
->pipe
.screen
);
569 const struct lp_fragment_shader_variant_key
*key
= &variant
->key
;
570 struct lp_type fs_type
;
571 struct lp_type blend_type
;
572 LLVMTypeRef fs_elem_type
;
573 LLVMTypeRef fs_vec_type
;
574 LLVMTypeRef fs_int_vec_type
;
575 LLVMTypeRef blend_vec_type
;
576 LLVMTypeRef blend_int_vec_type
;
577 LLVMTypeRef arg_types
[14];
578 LLVMTypeRef func_type
;
579 LLVMTypeRef int32_vec4_type
= lp_build_int32_vec4_type();
580 LLVMValueRef context_ptr
;
584 LLVMValueRef dadx_ptr
;
585 LLVMValueRef dady_ptr
;
586 LLVMValueRef color_ptr_ptr
;
587 LLVMValueRef depth_ptr
;
588 LLVMValueRef c0
, c1
, c2
, step0_ptr
, step1_ptr
, step2_ptr
;
589 LLVMBasicBlockRef block
;
590 LLVMBuilderRef builder
;
593 struct lp_build_sampler_soa
*sampler
;
594 struct lp_build_interp_soa_context interp
;
595 LLVMValueRef fs_mask
[LP_MAX_VECTOR_LENGTH
];
596 LLVMValueRef fs_out_color
[PIPE_MAX_COLOR_BUFS
][NUM_CHANNELS
][LP_MAX_VECTOR_LENGTH
];
597 LLVMValueRef blend_mask
;
598 LLVMValueRef blend_in_color
[NUM_CHANNELS
];
605 /* TODO: actually pick these based on the fs and color buffer
606 * characteristics. */
608 memset(&fs_type
, 0, sizeof fs_type
);
609 fs_type
.floating
= TRUE
; /* floating point values */
610 fs_type
.sign
= TRUE
; /* values are signed */
611 fs_type
.norm
= FALSE
; /* values are not limited to [0,1] or [-1,1] */
612 fs_type
.width
= 32; /* 32-bit float */
613 fs_type
.length
= 4; /* 4 elements per vector */
614 num_fs
= 4; /* number of quads per block */
616 memset(&blend_type
, 0, sizeof blend_type
);
617 blend_type
.floating
= FALSE
; /* values are integers */
618 blend_type
.sign
= FALSE
; /* values are unsigned */
619 blend_type
.norm
= TRUE
; /* values are in [0,1] or [-1,1] */
620 blend_type
.width
= 8; /* 8-bit ubyte values */
621 blend_type
.length
= 16; /* 16 elements per vector */
624 * Generate the function prototype. Any change here must be reflected in
625 * lp_jit.h's lp_jit_frag_func function pointer type, and vice-versa.
628 fs_elem_type
= lp_build_elem_type(fs_type
);
629 fs_vec_type
= lp_build_vec_type(fs_type
);
630 fs_int_vec_type
= lp_build_int_vec_type(fs_type
);
632 blend_vec_type
= lp_build_vec_type(blend_type
);
633 blend_int_vec_type
= lp_build_int_vec_type(blend_type
);
635 arg_types
[0] = screen
->context_ptr_type
; /* context */
636 arg_types
[1] = LLVMInt32Type(); /* x */
637 arg_types
[2] = LLVMInt32Type(); /* y */
638 arg_types
[3] = LLVMPointerType(fs_elem_type
, 0); /* a0 */
639 arg_types
[4] = LLVMPointerType(fs_elem_type
, 0); /* dadx */
640 arg_types
[5] = LLVMPointerType(fs_elem_type
, 0); /* dady */
641 arg_types
[6] = LLVMPointerType(LLVMPointerType(blend_vec_type
, 0), 0); /* color */
642 arg_types
[7] = LLVMPointerType(fs_int_vec_type
, 0); /* depth */
643 arg_types
[8] = LLVMInt32Type(); /* c0 */
644 arg_types
[9] = LLVMInt32Type(); /* c1 */
645 arg_types
[10] = LLVMInt32Type(); /* c2 */
646 /* Note: the step arrays are built as int32[16] but we interpret
647 * them here as int32_vec4[4].
649 arg_types
[11] = LLVMPointerType(int32_vec4_type
, 0);/* step0 */
650 arg_types
[12] = LLVMPointerType(int32_vec4_type
, 0);/* step1 */
651 arg_types
[13] = LLVMPointerType(int32_vec4_type
, 0);/* step2 */
653 func_type
= LLVMFunctionType(LLVMVoidType(), arg_types
, Elements(arg_types
), 0);
655 variant
->function
= LLVMAddFunction(screen
->module
, "shader", func_type
);
656 LLVMSetFunctionCallConv(variant
->function
, LLVMCCallConv
);
658 /* XXX: need to propagate noalias down into color param now we are
659 * passing a pointer-to-pointer?
661 for(i
= 0; i
< Elements(arg_types
); ++i
)
662 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
663 LLVMAddAttribute(LLVMGetParam(variant
->function
, i
), LLVMNoAliasAttribute
);
665 context_ptr
= LLVMGetParam(variant
->function
, 0);
666 x
= LLVMGetParam(variant
->function
, 1);
667 y
= LLVMGetParam(variant
->function
, 2);
668 a0_ptr
= LLVMGetParam(variant
->function
, 3);
669 dadx_ptr
= LLVMGetParam(variant
->function
, 4);
670 dady_ptr
= LLVMGetParam(variant
->function
, 5);
671 color_ptr_ptr
= LLVMGetParam(variant
->function
, 6);
672 depth_ptr
= LLVMGetParam(variant
->function
, 7);
673 c0
= LLVMGetParam(variant
->function
, 8);
674 c1
= LLVMGetParam(variant
->function
, 9);
675 c2
= LLVMGetParam(variant
->function
, 10);
676 step0_ptr
= LLVMGetParam(variant
->function
, 11);
677 step1_ptr
= LLVMGetParam(variant
->function
, 12);
678 step2_ptr
= LLVMGetParam(variant
->function
, 13);
680 lp_build_name(context_ptr
, "context");
681 lp_build_name(x
, "x");
682 lp_build_name(y
, "y");
683 lp_build_name(a0_ptr
, "a0");
684 lp_build_name(dadx_ptr
, "dadx");
685 lp_build_name(dady_ptr
, "dady");
686 lp_build_name(color_ptr_ptr
, "color_ptr");
687 lp_build_name(depth_ptr
, "depth");
688 lp_build_name(c0
, "c0");
689 lp_build_name(c1
, "c1");
690 lp_build_name(c2
, "c2");
691 lp_build_name(step0_ptr
, "step0");
692 lp_build_name(step1_ptr
, "step1");
693 lp_build_name(step2_ptr
, "step2");
699 block
= LLVMAppendBasicBlock(variant
->function
, "entry");
700 builder
= LLVMCreateBuilder();
701 LLVMPositionBuilderAtEnd(builder
, block
);
703 generate_pos0(builder
, x
, y
, &x0
, &y0
);
705 lp_build_interp_soa_init(&interp
,
709 a0_ptr
, dadx_ptr
, dady_ptr
,
712 /* code generated texture sampling */
713 sampler
= lp_llvm_sampler_soa_create(key
->sampler
, context_ptr
);
715 /* loop over quads in the block */
716 for(i
= 0; i
< num_fs
; ++i
) {
717 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), i
, 0);
718 LLVMValueRef out_color
[PIPE_MAX_COLOR_BUFS
][NUM_CHANNELS
];
719 LLVMValueRef depth_ptr_i
;
723 lp_build_interp_soa_update(&interp
, i
);
725 depth_ptr_i
= LLVMBuildGEP(builder
, depth_ptr
, &index
, 1, "");
727 generate_fs(lp
, shader
, key
,
734 &fs_mask
[i
], /* output */
738 step0_ptr
, step1_ptr
, step2_ptr
);
740 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++)
741 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
)
742 fs_out_color
[cbuf
][chan
][i
] = out_color
[cbuf
][chan
];
745 sampler
->destroy(sampler
);
747 /* Loop over color outputs / color buffers to do blending.
749 for(cbuf
= 0; cbuf
< key
->nr_cbufs
; cbuf
++) {
750 LLVMValueRef color_ptr
;
751 LLVMValueRef index
= LLVMConstInt(LLVMInt32Type(), cbuf
, 0);
754 * Convert the fs's output color and mask to fit to the blending type.
756 for(chan
= 0; chan
< NUM_CHANNELS
; ++chan
) {
757 lp_build_conv(builder
, fs_type
, blend_type
,
758 fs_out_color
[cbuf
][chan
], num_fs
,
759 &blend_in_color
[chan
], 1);
760 lp_build_name(blend_in_color
[chan
], "color%d.%c", cbuf
, "rgba"[chan
]);
763 lp_build_conv_mask(builder
, fs_type
, blend_type
,
767 color_ptr
= LLVMBuildLoad(builder
,
768 LLVMBuildGEP(builder
, color_ptr_ptr
, &index
, 1, ""),
770 lp_build_name(color_ptr
, "color_ptr%d", cbuf
);
775 generate_blend(&key
->blend
,
784 LLVMBuildRetVoid(builder
);
786 LLVMDisposeBuilder(builder
);
789 /* Verify the LLVM IR. If invalid, dump and abort */
791 if(LLVMVerifyFunction(variant
->function
, LLVMPrintMessageAction
)) {
793 LLVMDumpValue(variant
->function
);
798 /* Apply optimizations to LLVM IR */
800 LLVMRunFunctionPassManager(screen
->pass
, variant
->function
);
802 if (LP_DEBUG
& DEBUG_JIT
) {
803 /* Print the LLVM IR to stderr */
804 LLVMDumpValue(variant
->function
);
809 * Translate the LLVM IR into machine code.
811 variant
->jit_function
= (lp_jit_frag_func
)LLVMGetPointerToGlobal(screen
->engine
, variant
->function
);
813 if (LP_DEBUG
& DEBUG_ASM
)
814 lp_disassemble(variant
->jit_function
);
816 variant
->next
= shader
->variants
;
817 shader
->variants
= variant
;
821 static struct lp_fragment_shader_variant
*
822 generate_variant(struct llvmpipe_context
*lp
,
823 struct lp_fragment_shader
*shader
,
824 const struct lp_fragment_shader_variant_key
*key
)
826 struct lp_fragment_shader_variant
*variant
;
828 if (LP_DEBUG
& DEBUG_JIT
) {
831 tgsi_dump(shader
->base
.tokens
, 0);
832 if(key
->depth
.enabled
) {
833 debug_printf("depth.format = %s\n", pf_name(key
->zsbuf_format
));
834 debug_printf("depth.func = %s\n", debug_dump_func(key
->depth
.func
, TRUE
));
835 debug_printf("depth.writemask = %u\n", key
->depth
.writemask
);
837 if(key
->alpha
.enabled
) {
838 debug_printf("alpha.func = %s\n", debug_dump_func(key
->alpha
.func
, TRUE
));
839 debug_printf("alpha.ref_value = %f\n", key
->alpha
.ref_value
);
841 if(key
->blend
.logicop_enable
) {
842 debug_printf("blend.logicop_func = %u\n", key
->blend
.logicop_func
);
844 else if(key
->blend
.blend_enable
) {
845 debug_printf("blend.rgb_func = %s\n", debug_dump_blend_func (key
->blend
.rgb_func
, TRUE
));
846 debug_printf("rgb_src_factor = %s\n", debug_dump_blend_factor(key
->blend
.rgb_src_factor
, TRUE
));
847 debug_printf("rgb_dst_factor = %s\n", debug_dump_blend_factor(key
->blend
.rgb_dst_factor
, TRUE
));
848 debug_printf("alpha_func = %s\n", debug_dump_blend_func (key
->blend
.alpha_func
, TRUE
));
849 debug_printf("alpha_src_factor = %s\n", debug_dump_blend_factor(key
->blend
.alpha_src_factor
, TRUE
));
850 debug_printf("alpha_dst_factor = %s\n", debug_dump_blend_factor(key
->blend
.alpha_dst_factor
, TRUE
));
852 debug_printf("blend.colormask = 0x%x\n", key
->blend
.colormask
);
853 for(i
= 0; i
< PIPE_MAX_SAMPLERS
; ++i
) {
854 if(key
->sampler
[i
].format
) {
855 debug_printf("sampler[%u] = \n", i
);
856 debug_printf(" .format = %s\n",
857 pf_name(key
->sampler
[i
].format
));
858 debug_printf(" .target = %s\n",
859 debug_dump_tex_target(key
->sampler
[i
].target
, TRUE
));
860 debug_printf(" .pot = %u %u %u\n",
861 key
->sampler
[i
].pot_width
,
862 key
->sampler
[i
].pot_height
,
863 key
->sampler
[i
].pot_depth
);
864 debug_printf(" .wrap = %s %s %s\n",
865 debug_dump_tex_wrap(key
->sampler
[i
].wrap_s
, TRUE
),
866 debug_dump_tex_wrap(key
->sampler
[i
].wrap_t
, TRUE
),
867 debug_dump_tex_wrap(key
->sampler
[i
].wrap_r
, TRUE
));
868 debug_printf(" .min_img_filter = %s\n",
869 debug_dump_tex_filter(key
->sampler
[i
].min_img_filter
, TRUE
));
870 debug_printf(" .min_mip_filter = %s\n",
871 debug_dump_tex_mipfilter(key
->sampler
[i
].min_mip_filter
, TRUE
));
872 debug_printf(" .mag_img_filter = %s\n",
873 debug_dump_tex_filter(key
->sampler
[i
].mag_img_filter
, TRUE
));
874 if(key
->sampler
[i
].compare_mode
!= PIPE_TEX_COMPARE_NONE
)
875 debug_printf(" .compare_func = %s\n", debug_dump_func(key
->sampler
[i
].compare_func
, TRUE
));
876 debug_printf(" .normalized_coords = %u\n", key
->sampler
[i
].normalized_coords
);
877 debug_printf(" .prefilter = %u\n", key
->sampler
[i
].prefilter
);
882 variant
= CALLOC_STRUCT(lp_fragment_shader_variant
);
886 variant
->shader
= shader
;
887 memcpy(&variant
->key
, key
, sizeof *key
);
889 generate_fragment(lp
, shader
, variant
);
896 llvmpipe_create_fs_state(struct pipe_context
*pipe
,
897 const struct pipe_shader_state
*templ
)
899 struct lp_fragment_shader
*shader
;
901 shader
= CALLOC_STRUCT(lp_fragment_shader
);
905 /* get/save the summary info for this shader */
906 tgsi_scan_shader(templ
->tokens
, &shader
->info
);
908 /* we need to keep a local copy of the tokens */
909 shader
->base
.tokens
= tgsi_dup_tokens(templ
->tokens
);
916 llvmpipe_bind_fs_state(struct pipe_context
*pipe
, void *fs
)
918 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
920 if (llvmpipe
->fs
== fs
)
923 draw_flush(llvmpipe
->draw
);
927 llvmpipe
->dirty
|= LP_NEW_FS
;
932 llvmpipe_delete_fs_state(struct pipe_context
*pipe
, void *fs
)
934 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
935 struct llvmpipe_screen
*screen
= llvmpipe_screen(pipe
->screen
);
936 struct lp_fragment_shader
*shader
= fs
;
937 struct lp_fragment_shader_variant
*variant
;
939 assert(fs
!= llvmpipe
->fs
);
942 variant
= shader
->variants
;
944 struct lp_fragment_shader_variant
*next
= variant
->next
;
946 if(variant
->function
) {
947 if(variant
->jit_function
)
948 LLVMFreeMachineCodeForFunction(screen
->engine
, variant
->function
);
949 LLVMDeleteFunction(variant
->function
);
957 FREE((void *) shader
->base
.tokens
);
964 llvmpipe_set_constant_buffer(struct pipe_context
*pipe
,
965 uint shader
, uint index
,
966 const struct pipe_constant_buffer
*constants
)
968 struct llvmpipe_context
*llvmpipe
= llvmpipe_context(pipe
);
969 struct pipe_buffer
*buffer
= constants
? constants
->buffer
: NULL
;
970 unsigned size
= buffer
? buffer
->size
: 0;
971 const void *data
= buffer
? llvmpipe_buffer(buffer
)->data
: NULL
;
973 assert(shader
< PIPE_SHADER_TYPES
);
976 if(llvmpipe
->constants
[shader
].buffer
== buffer
)
979 draw_flush(llvmpipe
->draw
);
981 /* note: reference counting */
982 pipe_buffer_reference(&llvmpipe
->constants
[shader
].buffer
, buffer
);
984 if(shader
== PIPE_SHADER_VERTEX
) {
985 draw_set_mapped_constant_buffer(llvmpipe
->draw
, PIPE_SHADER_VERTEX
,
989 llvmpipe
->dirty
|= LP_NEW_CONSTANTS
;
994 * We need to generate several variants of the fragment pipeline to match
995 * all the combinations of the contributing state atoms.
997 * TODO: there is actually no reason to tie this to context state -- the
998 * generated code could be cached globally in the screen.
1001 make_variant_key(struct llvmpipe_context
*lp
,
1002 struct lp_fragment_shader
*shader
,
1003 struct lp_fragment_shader_variant_key
*key
)
1007 memset(key
, 0, sizeof *key
);
1009 if(lp
->framebuffer
.zsbuf
&&
1010 lp
->depth_stencil
->depth
.enabled
) {
1011 key
->zsbuf_format
= lp
->framebuffer
.zsbuf
->format
;
1012 memcpy(&key
->depth
, &lp
->depth_stencil
->depth
, sizeof key
->depth
);
1015 key
->alpha
.enabled
= lp
->depth_stencil
->alpha
.enabled
;
1016 if(key
->alpha
.enabled
)
1017 key
->alpha
.func
= lp
->depth_stencil
->alpha
.func
;
1018 /* alpha.ref_value is passed in jit_context */
1020 key
->flatshade
= lp
->rasterizer
->flatshade
;
1021 key
->scissor
= lp
->rasterizer
->scissor
;
1023 if (lp
->framebuffer
.nr_cbufs
) {
1024 memcpy(&key
->blend
, lp
->blend
, sizeof key
->blend
);
1027 key
->nr_cbufs
= lp
->framebuffer
.nr_cbufs
;
1028 for (i
= 0; i
< lp
->framebuffer
.nr_cbufs
; i
++) {
1029 const struct util_format_description
*format_desc
;
1032 format_desc
= util_format_description(lp
->framebuffer
.cbufs
[i
]->format
);
1033 assert(format_desc
->layout
== UTIL_FORMAT_COLORSPACE_RGB
||
1034 format_desc
->layout
== UTIL_FORMAT_COLORSPACE_SRGB
);
1036 /* mask out color channels not present in the color buffer.
1037 * Should be simple to incorporate per-cbuf writemasks:
1039 for(chan
= 0; chan
< 4; ++chan
) {
1040 enum util_format_swizzle swizzle
= format_desc
->swizzle
[chan
];
1042 if(swizzle
<= UTIL_FORMAT_SWIZZLE_W
)
1043 key
->cbuf_blend
[i
].colormask
|= (1 << chan
);
1047 for(i
= 0; i
< PIPE_MAX_SAMPLERS
; ++i
)
1048 if(shader
->info
.file_mask
[TGSI_FILE_SAMPLER
] & (1 << i
))
1049 lp_sampler_static_state(&key
->sampler
[i
], lp
->texture
[i
], lp
->sampler
[i
]);
1054 * Update fragment state. This is called just prior to drawing
1055 * something when some fragment-related state has changed.
1058 llvmpipe_update_fs(struct llvmpipe_context
*lp
)
1060 struct lp_fragment_shader
*shader
= lp
->fs
;
1061 struct lp_fragment_shader_variant_key key
;
1062 struct lp_fragment_shader_variant
*variant
;
1065 make_variant_key(lp
, shader
, &key
);
1067 variant
= shader
->variants
;
1069 if(memcmp(&variant
->key
, &key
, sizeof key
) == 0)
1072 variant
= variant
->next
;
1076 variant
= generate_variant(lp
, shader
, &key
);
1078 shader
->current
= variant
;
1080 /* TODO: put this in the variant */
1081 /* TODO: most of these can be relaxed, in particular the colormask */
1082 opaque
= !key
.blend
.logicop_enable
&&
1083 !key
.blend
.blend_enable
&&
1084 key
.blend
.colormask
== 0xf &&
1085 !key
.alpha
.enabled
&&
1086 !key
.depth
.enabled
&&
1088 !shader
->info
.uses_kill
1091 lp_setup_set_fs_function(lp
->setup
,
1092 shader
->current
->jit_function
,