1 /**************************************************************************
3 * Copyright 2009 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Texture sampling -- SoA.
32 * @author Jose Fonseca <jfonseca@vmware.com>
35 #include "pipe/p_defines.h"
36 #include "pipe/p_state.h"
37 #include "util/u_debug.h"
38 #include "util/u_dump.h"
39 #include "util/u_memory.h"
40 #include "util/u_math.h"
41 #include "util/u_format.h"
42 #include "util/u_cpu_detect.h"
43 #include "lp_bld_debug.h"
44 #include "lp_bld_type.h"
45 #include "lp_bld_const.h"
46 #include "lp_bld_conv.h"
47 #include "lp_bld_arit.h"
48 #include "lp_bld_logic.h"
49 #include "lp_bld_swizzle.h"
50 #include "lp_bld_pack.h"
51 #include "lp_bld_flow.h"
52 #include "lp_bld_format.h"
53 #include "lp_bld_sample.h"
57 * Keep all information for sampling code generation in a single place.
59 struct lp_build_sample_context
61 LLVMBuilderRef builder
;
63 const struct lp_sampler_static_state
*static_state
;
65 struct lp_sampler_dynamic_state
*dynamic_state
;
67 const struct util_format_description
*format_desc
;
69 /** regular scalar float type */
70 struct lp_type float_type
;
71 struct lp_build_context float_bld
;
73 /** regular scalar float type */
74 struct lp_type int_type
;
75 struct lp_build_context int_bld
;
77 /** Incoming coordinates type and build context */
78 struct lp_type coord_type
;
79 struct lp_build_context coord_bld
;
81 /** Unsigned integer coordinates */
82 struct lp_type uint_coord_type
;
83 struct lp_build_context uint_coord_bld
;
85 /** Signed integer coordinates */
86 struct lp_type int_coord_type
;
87 struct lp_build_context int_coord_bld
;
89 /** Output texels type and build context */
90 struct lp_type texel_type
;
91 struct lp_build_context texel_bld
;
96 * Does the given texture wrap mode allow sampling the texture border color?
97 * XXX maybe move this into gallium util code.
100 wrap_mode_uses_border_color(unsigned mode
)
103 case PIPE_TEX_WRAP_REPEAT
:
104 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
105 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
106 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
108 case PIPE_TEX_WRAP_CLAMP
:
109 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
110 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
111 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
114 assert(0 && "unexpected wrap mode");
121 lp_build_get_mipmap_level(struct lp_build_sample_context
*bld
,
122 LLVMValueRef data_array
, LLVMValueRef level
)
124 LLVMValueRef indexes
[2], data_ptr
;
125 indexes
[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
127 data_ptr
= LLVMBuildGEP(bld
->builder
, data_array
, indexes
, 2, "");
128 data_ptr
= LLVMBuildLoad(bld
->builder
, data_ptr
, "");
134 lp_build_get_const_mipmap_level(struct lp_build_sample_context
*bld
,
135 LLVMValueRef data_array
, int level
)
137 LLVMValueRef lvl
= LLVMConstInt(LLVMInt32Type(), level
, 0);
138 return lp_build_get_mipmap_level(bld
, data_array
, lvl
);
143 * Dereference stride_array[mipmap_level] array to get a stride.
144 * Return stride as a vector.
147 lp_build_get_level_stride_vec(struct lp_build_sample_context
*bld
,
148 LLVMValueRef stride_array
, LLVMValueRef level
)
150 LLVMValueRef indexes
[2], stride
;
151 indexes
[0] = LLVMConstInt(LLVMInt32Type(), 0, 0);
153 stride
= LLVMBuildGEP(bld
->builder
, stride_array
, indexes
, 2, "");
154 stride
= LLVMBuildLoad(bld
->builder
, stride
, "");
155 stride
= lp_build_broadcast_scalar(&bld
->int_coord_bld
, stride
);
160 /** Dereference stride_array[0] array to get a stride (as vector). */
162 lp_build_get_const_level_stride_vec(struct lp_build_sample_context
*bld
,
163 LLVMValueRef stride_array
, int level
)
165 LLVMValueRef lvl
= LLVMConstInt(LLVMInt32Type(), level
, 0);
166 return lp_build_get_level_stride_vec(bld
, stride_array
, lvl
);
171 texture_dims(enum pipe_texture_target tex
)
174 case PIPE_TEXTURE_1D
:
176 case PIPE_TEXTURE_2D
:
177 case PIPE_TEXTURE_CUBE
:
179 case PIPE_TEXTURE_3D
:
182 assert(0 && "bad texture target in texture_dims()");
190 * Generate code to fetch a texel from a texture at int coords (x, y, z).
191 * The computation depends on whether the texture is 1D, 2D or 3D.
192 * The result, texel, will be:
193 * texel[0] = red values
194 * texel[1] = green values
195 * texel[2] = blue values
196 * texel[3] = alpha values
199 lp_build_sample_texel_soa(struct lp_build_sample_context
*bld
,
206 LLVMValueRef y_stride
,
207 LLVMValueRef z_stride
,
208 LLVMValueRef data_ptr
,
211 const int dims
= texture_dims(bld
->static_state
->target
);
212 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
215 LLVMValueRef use_border
= NULL
;
217 /* use_border = x < 0 || x >= width || y < 0 || y >= height */
218 if (wrap_mode_uses_border_color(bld
->static_state
->wrap_s
)) {
220 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, x
, int_coord_bld
->zero
);
221 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, x
, width
);
222 use_border
= LLVMBuildOr(bld
->builder
, b1
, b2
, "b1_or_b2");
225 if (dims
>= 2 && wrap_mode_uses_border_color(bld
->static_state
->wrap_t
)) {
227 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, y
, int_coord_bld
->zero
);
228 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, y
, height
);
230 use_border
= LLVMBuildOr(bld
->builder
, use_border
, b1
, "ub_or_b1");
231 use_border
= LLVMBuildOr(bld
->builder
, use_border
, b2
, "ub_or_b2");
234 use_border
= LLVMBuildOr(bld
->builder
, b1
, b2
, "b1_or_b2");
238 if (dims
== 3 && wrap_mode_uses_border_color(bld
->static_state
->wrap_r
)) {
240 b1
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_LESS
, z
, int_coord_bld
->zero
);
241 b2
= lp_build_cmp(int_coord_bld
, PIPE_FUNC_GEQUAL
, z
, depth
);
243 use_border
= LLVMBuildOr(bld
->builder
, use_border
, b1
, "ub_or_b1");
244 use_border
= LLVMBuildOr(bld
->builder
, use_border
, b2
, "ub_or_b2");
247 use_border
= LLVMBuildOr(bld
->builder
, b1
, b2
, "b1_or_b2");
252 * Note: if we find an app which frequently samples the texture border
253 * we might want to implement a true conditional here to avoid sampling
254 * the texture whenever possible (since that's quite a bit of code).
257 * texel = border_color;
260 * texel = sample_texture(coord);
262 * As it is now, we always sample the texture, then selectively replace
263 * the texel color results with the border color.
266 /* convert x,y,z coords to linear offset from start of texture, in bytes */
267 offset
= lp_build_sample_offset(&bld
->uint_coord_bld
,
269 x
, y
, z
, y_stride
, z_stride
);
271 assert(bld
->format_desc
->block
.width
== 1);
272 assert(bld
->format_desc
->block
.height
== 1);
273 assert(bld
->format_desc
->block
.bits
<= bld
->texel_type
.width
);
275 /* gather the texels from the texture */
276 packed
= lp_build_gather(bld
->builder
,
277 bld
->texel_type
.length
,
278 bld
->format_desc
->block
.bits
,
279 bld
->texel_type
.width
,
282 texel
[0] = texel
[1] = texel
[2] = texel
[3] = NULL
;
284 /* convert texels to float rgba */
285 lp_build_unpack_rgba_soa(bld
->builder
,
291 /* select texel color or border color depending on use_border */
293 for (chan
= 0; chan
< 4; chan
++) {
294 LLVMValueRef border_chan
=
295 lp_build_const_vec(bld
->texel_type
,
296 bld
->static_state
->border_color
[chan
]);
297 texel
[chan
] = lp_build_select(&bld
->texel_bld
, use_border
,
298 border_chan
, texel
[chan
]);
305 lp_build_sample_packed(struct lp_build_sample_context
*bld
,
308 LLVMValueRef y_stride
,
309 LLVMValueRef data_array
)
312 LLVMValueRef data_ptr
;
314 offset
= lp_build_sample_offset(&bld
->uint_coord_bld
,
316 x
, y
, NULL
, y_stride
, NULL
);
318 assert(bld
->format_desc
->block
.width
== 1);
319 assert(bld
->format_desc
->block
.height
== 1);
320 assert(bld
->format_desc
->block
.bits
<= bld
->texel_type
.width
);
322 /* get pointer to mipmap level 0 data */
323 data_ptr
= lp_build_get_const_mipmap_level(bld
, data_array
, 0);
325 return lp_build_gather(bld
->builder
,
326 bld
->texel_type
.length
,
327 bld
->format_desc
->block
.bits
,
328 bld
->texel_type
.width
,
334 * Helper to compute the mirror function for the PIPE_WRAP_MIRROR modes.
337 lp_build_coord_mirror(struct lp_build_sample_context
*bld
,
340 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
341 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
342 LLVMValueRef fract
, flr
, isOdd
;
344 /* fract = coord - floor(coord) */
345 fract
= lp_build_sub(coord_bld
, coord
, lp_build_floor(coord_bld
, coord
));
347 /* flr = ifloor(coord); */
348 flr
= lp_build_ifloor(coord_bld
, coord
);
350 /* isOdd = flr & 1 */
351 isOdd
= LLVMBuildAnd(bld
->builder
, flr
, int_coord_bld
->one
, "");
353 /* make coord positive or negative depending on isOdd */
354 coord
= lp_build_set_sign(coord_bld
, fract
, isOdd
);
356 /* convert isOdd to float */
357 isOdd
= lp_build_int_to_float(coord_bld
, isOdd
);
359 /* add isOdd to coord */
360 coord
= lp_build_add(coord_bld
, coord
, isOdd
);
367 * We only support a few wrap modes in lp_build_sample_wrap_int() at this time.
368 * Return whether the given mode is supported by that function.
371 is_simple_wrap_mode(unsigned mode
)
374 case PIPE_TEX_WRAP_REPEAT
:
375 case PIPE_TEX_WRAP_CLAMP
:
376 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
378 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
386 * Build LLVM code for texture wrap mode, for scaled integer texcoords.
387 * \param coord the incoming texcoord (s,t,r or q) scaled to the texture size
388 * \param length the texture size along one dimension
389 * \param is_pot if TRUE, length is a power of two
390 * \param wrap_mode one of PIPE_TEX_WRAP_x
393 lp_build_sample_wrap_int(struct lp_build_sample_context
*bld
,
399 struct lp_build_context
*uint_coord_bld
= &bld
->uint_coord_bld
;
400 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
401 LLVMValueRef length_minus_one
;
403 length_minus_one
= lp_build_sub(uint_coord_bld
, length
, uint_coord_bld
->one
);
406 case PIPE_TEX_WRAP_REPEAT
:
408 coord
= LLVMBuildAnd(bld
->builder
, coord
, length_minus_one
, "");
410 /* Signed remainder won't give the right results for negative
411 * dividends but unsigned remainder does.*/
412 coord
= LLVMBuildURem(bld
->builder
, coord
, length
, "");
415 case PIPE_TEX_WRAP_CLAMP
:
416 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
417 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
418 coord
= lp_build_max(int_coord_bld
, coord
, int_coord_bld
->zero
);
419 coord
= lp_build_min(int_coord_bld
, coord
, length_minus_one
);
422 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
423 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
424 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
425 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
427 _debug_printf("llvmpipe: failed to translate texture wrap mode %s\n",
428 util_dump_tex_wrap(wrap_mode
, TRUE
));
429 coord
= lp_build_max(uint_coord_bld
, coord
, uint_coord_bld
->zero
);
430 coord
= lp_build_min(uint_coord_bld
, coord
, length_minus_one
);
442 * Build LLVM code for texture wrap mode for linear filtering.
443 * \param x0_out returns first integer texcoord
444 * \param x1_out returns second integer texcoord
445 * \param weight_out returns linear interpolation weight
448 lp_build_sample_wrap_linear(struct lp_build_sample_context
*bld
,
453 LLVMValueRef
*x0_out
,
454 LLVMValueRef
*x1_out
,
455 LLVMValueRef
*weight_out
)
457 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
458 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
459 struct lp_build_context
*uint_coord_bld
= &bld
->uint_coord_bld
;
460 LLVMValueRef two
= lp_build_const_vec(coord_bld
->type
, 2.0);
461 LLVMValueRef half
= lp_build_const_vec(coord_bld
->type
, 0.5);
462 LLVMValueRef length_f
= lp_build_int_to_float(coord_bld
, length
);
463 LLVMValueRef length_minus_one
= lp_build_sub(uint_coord_bld
, length
, uint_coord_bld
->one
);
464 LLVMValueRef length_f_minus_one
= lp_build_sub(coord_bld
, length_f
, coord_bld
->one
);
465 LLVMValueRef coord0
, coord1
, weight
;
468 case PIPE_TEX_WRAP_REPEAT
:
469 /* mul by size and subtract 0.5 */
470 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
471 coord
= lp_build_sub(coord_bld
, coord
, half
);
473 coord0
= lp_build_ifloor(coord_bld
, coord
);
474 coord1
= lp_build_add(uint_coord_bld
, coord0
, uint_coord_bld
->one
);
475 /* compute lerp weight */
476 weight
= lp_build_fract(coord_bld
, coord
);
479 coord0
= LLVMBuildAnd(bld
->builder
, coord0
, length_minus_one
, "");
480 coord1
= LLVMBuildAnd(bld
->builder
, coord1
, length_minus_one
, "");
483 /* Signed remainder won't give the right results for negative
484 * dividends but unsigned remainder does.*/
485 coord0
= LLVMBuildURem(bld
->builder
, coord0
, length
, "");
486 coord1
= LLVMBuildURem(bld
->builder
, coord1
, length
, "");
490 case PIPE_TEX_WRAP_CLAMP
:
491 if (bld
->static_state
->normalized_coords
) {
492 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
494 weight
= lp_build_fract(coord_bld
, coord
);
495 coord0
= lp_build_clamp(coord_bld
, coord
, coord_bld
->zero
,
497 coord1
= lp_build_add(coord_bld
, coord
, coord_bld
->one
);
498 coord1
= lp_build_clamp(coord_bld
, coord1
, coord_bld
->zero
,
500 coord0
= lp_build_ifloor(coord_bld
, coord0
);
501 coord1
= lp_build_ifloor(coord_bld
, coord1
);
504 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
505 if (bld
->static_state
->normalized_coords
) {
507 coord
= lp_build_clamp(coord_bld
, coord
, coord_bld
->zero
, coord_bld
->one
);
508 /* mul by tex size and subtract 0.5 */
509 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
510 coord
= lp_build_sub(coord_bld
, coord
, half
);
513 LLVMValueRef min
, max
;
514 /* clamp to [0.5, length - 0.5] */
515 min
= lp_build_const_vec(coord_bld
->type
, 0.5F
);
516 max
= lp_build_sub(coord_bld
, length_f
, min
);
517 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
519 /* compute lerp weight */
520 weight
= lp_build_fract(coord_bld
, coord
);
521 /* coord0 = floor(coord); */
522 coord0
= lp_build_ifloor(coord_bld
, coord
);
523 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
524 /* coord0 = max(coord0, 0) */
525 coord0
= lp_build_max(int_coord_bld
, coord0
, int_coord_bld
->zero
);
526 /* coord1 = min(coord1, length-1) */
527 coord1
= lp_build_min(int_coord_bld
, coord1
, length_minus_one
);
530 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
532 LLVMValueRef min
, max
;
533 if (bld
->static_state
->normalized_coords
) {
534 /* min = -1.0 / (2 * length) = -0.5 / length */
535 min
= lp_build_mul(coord_bld
,
536 lp_build_const_vec(coord_bld
->type
, -0.5F
),
537 lp_build_rcp(coord_bld
, length_f
));
538 /* max = 1.0 - min */
539 max
= lp_build_sub(coord_bld
, coord_bld
->one
, min
);
540 /* coord = clamp(coord, min, max) */
541 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
542 /* scale coord to length (and sub 0.5?) */
543 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
544 coord
= lp_build_sub(coord_bld
, coord
, half
);
547 /* clamp to [-0.5, length + 0.5] */
548 min
= lp_build_const_vec(coord_bld
->type
, -0.5F
);
549 max
= lp_build_sub(coord_bld
, length_f
, min
);
550 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
551 coord
= lp_build_sub(coord_bld
, coord
, half
);
553 /* compute lerp weight */
554 weight
= lp_build_fract(coord_bld
, coord
);
556 coord0
= lp_build_ifloor(coord_bld
, coord
);
557 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
561 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
562 /* compute mirror function */
563 coord
= lp_build_coord_mirror(bld
, coord
);
565 /* scale coord to length */
566 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
567 coord
= lp_build_sub(coord_bld
, coord
, half
);
569 /* compute lerp weight */
570 weight
= lp_build_fract(coord_bld
, coord
);
572 /* convert to int coords */
573 coord0
= lp_build_ifloor(coord_bld
, coord
);
574 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
576 /* coord0 = max(coord0, 0) */
577 coord0
= lp_build_max(int_coord_bld
, coord0
, int_coord_bld
->zero
);
578 /* coord1 = min(coord1, length-1) */
579 coord1
= lp_build_min(int_coord_bld
, coord1
, length_minus_one
);
582 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
584 LLVMValueRef min
, max
;
585 /* min = 1.0 / (2 * length) */
586 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
587 /* max = 1.0 - min */
588 max
= lp_build_sub(coord_bld
, coord_bld
->one
, min
);
590 coord
= lp_build_abs(coord_bld
, coord
);
591 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
592 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
593 if(0)coord
= lp_build_sub(coord_bld
, coord
, half
);
594 weight
= lp_build_fract(coord_bld
, coord
);
595 coord0
= lp_build_ifloor(coord_bld
, coord
);
596 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
600 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
602 LLVMValueRef min
, max
;
603 /* min = 1.0 / (2 * length) */
604 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
605 /* max = 1.0 - min */
606 max
= lp_build_sub(coord_bld
, coord_bld
->one
, min
);
608 coord
= lp_build_abs(coord_bld
, coord
);
609 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
610 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
611 coord
= lp_build_sub(coord_bld
, coord
, half
);
612 weight
= lp_build_fract(coord_bld
, coord
);
613 coord0
= lp_build_ifloor(coord_bld
, coord
);
614 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
618 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
620 LLVMValueRef min
, max
;
621 /* min = -1.0 / (2 * length) = -0.5 / length */
622 min
= lp_build_mul(coord_bld
,
623 lp_build_const_vec(coord_bld
->type
, -0.5F
),
624 lp_build_rcp(coord_bld
, length_f
));
625 /* max = 1.0 - min */
626 max
= lp_build_sub(coord_bld
, coord_bld
->one
, min
);
628 coord
= lp_build_abs(coord_bld
, coord
);
629 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
630 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
631 coord
= lp_build_sub(coord_bld
, coord
, half
);
632 weight
= lp_build_fract(coord_bld
, coord
);
633 coord0
= lp_build_ifloor(coord_bld
, coord
);
634 coord1
= lp_build_add(int_coord_bld
, coord0
, int_coord_bld
->one
);
647 *weight_out
= weight
;
652 * Build LLVM code for texture wrap mode for nearest filtering.
653 * \param coord the incoming texcoord (nominally in [0,1])
654 * \param length the texture size along one dimension, as int
655 * \param is_pot if TRUE, length is a power of two
656 * \param wrap_mode one of PIPE_TEX_WRAP_x
659 lp_build_sample_wrap_nearest(struct lp_build_sample_context
*bld
,
665 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
666 struct lp_build_context
*int_coord_bld
= &bld
->int_coord_bld
;
667 struct lp_build_context
*uint_coord_bld
= &bld
->uint_coord_bld
;
668 LLVMValueRef two
= lp_build_const_vec(coord_bld
->type
, 2.0);
669 LLVMValueRef length_f
= lp_build_int_to_float(coord_bld
, length
);
670 LLVMValueRef length_minus_one
= lp_build_sub(uint_coord_bld
, length
, uint_coord_bld
->one
);
671 LLVMValueRef length_f_minus_one
= lp_build_sub(coord_bld
, length_f
, coord_bld
->one
);
675 case PIPE_TEX_WRAP_REPEAT
:
676 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
677 icoord
= lp_build_ifloor(coord_bld
, coord
);
679 icoord
= LLVMBuildAnd(bld
->builder
, icoord
, length_minus_one
, "");
681 /* Signed remainder won't give the right results for negative
682 * dividends but unsigned remainder does.*/
683 icoord
= LLVMBuildURem(bld
->builder
, icoord
, length
, "");
686 case PIPE_TEX_WRAP_CLAMP
:
688 if (bld
->static_state
->normalized_coords
) {
689 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
692 icoord
= lp_build_ifloor(coord_bld
, coord
);
693 /* clamp to [0, size-1]. Note: int coord builder type */
694 icoord
= lp_build_clamp(int_coord_bld
, icoord
, int_coord_bld
->zero
,
698 case PIPE_TEX_WRAP_CLAMP_TO_EDGE
:
700 LLVMValueRef min
, max
;
701 if (bld
->static_state
->normalized_coords
) {
702 /* min = 1.0 / (2 * length) */
703 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
704 /* max = length - min */
705 max
= lp_build_sub(coord_bld
, length_f
, min
);
706 /* scale coord to length */
707 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
710 /* clamp to [0.5, length - 0.5] */
711 min
= lp_build_const_vec(coord_bld
->type
, 0.5F
);
712 max
= lp_build_sub(coord_bld
, length_f
, min
);
714 /* coord = clamp(coord, min, max) */
715 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
716 icoord
= lp_build_ifloor(coord_bld
, coord
);
720 case PIPE_TEX_WRAP_CLAMP_TO_BORDER
:
721 /* Note: this is the same as CLAMP_TO_EDGE, except min = -min */
723 LLVMValueRef min
, max
;
724 if (bld
->static_state
->normalized_coords
) {
725 /* min = -1.0 / (2 * length) = -0.5 / length */
726 min
= lp_build_mul(coord_bld
,
727 lp_build_const_vec(coord_bld
->type
, -0.5F
),
728 lp_build_rcp(coord_bld
, length_f
));
729 /* max = length - min */
730 max
= lp_build_sub(coord_bld
, length_f
, min
);
731 /* scale coord to length */
732 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
735 /* clamp to [-0.5, length + 0.5] */
736 min
= lp_build_const_vec(coord_bld
->type
, -0.5F
);
737 max
= lp_build_sub(coord_bld
, length_f
, min
);
739 /* coord = clamp(coord, min, max) */
740 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
741 icoord
= lp_build_ifloor(coord_bld
, coord
);
745 case PIPE_TEX_WRAP_MIRROR_REPEAT
:
747 LLVMValueRef min
, max
;
748 /* min = 1.0 / (2 * length) */
749 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
750 /* max = length - min */
751 max
= lp_build_sub(coord_bld
, length_f
, min
);
753 /* compute mirror function */
754 coord
= lp_build_coord_mirror(bld
, coord
);
756 /* scale coord to length */
757 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
759 /* coord = clamp(coord, min, max) */
760 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
761 icoord
= lp_build_ifloor(coord_bld
, coord
);
765 case PIPE_TEX_WRAP_MIRROR_CLAMP
:
766 coord
= lp_build_abs(coord_bld
, coord
);
767 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
768 coord
= lp_build_clamp(coord_bld
, coord
, coord_bld
->zero
, length_f_minus_one
);
769 icoord
= lp_build_ifloor(coord_bld
, coord
);
772 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_EDGE
:
774 LLVMValueRef min
, max
;
775 /* min = 1.0 / (2 * length) */
776 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
777 /* max = length - min */
778 max
= lp_build_sub(coord_bld
, length_f
, min
);
780 coord
= lp_build_abs(coord_bld
, coord
);
781 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
782 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
783 icoord
= lp_build_ifloor(coord_bld
, coord
);
787 case PIPE_TEX_WRAP_MIRROR_CLAMP_TO_BORDER
:
789 LLVMValueRef min
, max
;
790 /* min = 1.0 / (2 * length) */
791 min
= lp_build_rcp(coord_bld
, lp_build_mul(coord_bld
, two
, length_f
));
792 min
= lp_build_negate(coord_bld
, min
);
793 /* max = length - min */
794 max
= lp_build_sub(coord_bld
, length_f
, min
);
796 coord
= lp_build_abs(coord_bld
, coord
);
797 coord
= lp_build_mul(coord_bld
, coord
, length_f
);
798 coord
= lp_build_clamp(coord_bld
, coord
, min
, max
);
799 icoord
= lp_build_ifloor(coord_bld
, coord
);
813 * Codegen equivalent for u_minify().
814 * Return max(1, base_size >> level);
817 lp_build_minify(struct lp_build_sample_context
*bld
,
818 LLVMValueRef base_size
,
821 LLVMValueRef size
= LLVMBuildAShr(bld
->builder
, base_size
, level
, "minify");
822 size
= lp_build_max(&bld
->int_coord_bld
, size
, bld
->int_coord_bld
.one
);
828 * Generate code to compute texture level of detail (lambda).
829 * \param s vector of texcoord s values
830 * \param t vector of texcoord t values
831 * \param r vector of texcoord r values
832 * \param width scalar int texture width
833 * \param height scalar int texture height
834 * \param depth scalar int texture depth
837 lp_build_lod_selector(struct lp_build_sample_context
*bld
,
846 if (bld
->static_state
->min_lod
== bld
->static_state
->max_lod
) {
847 /* User is forcing sampling from a particular mipmap level.
848 * This is hit during mipmap generation.
850 return LLVMConstReal(LLVMFloatType(), bld
->static_state
->min_lod
);
853 const int dims
= texture_dims(bld
->static_state
->target
);
854 struct lp_build_context
*float_bld
= &bld
->float_bld
;
855 LLVMValueRef lod_bias
= LLVMConstReal(LLVMFloatType(),
856 bld
->static_state
->lod_bias
);
857 LLVMValueRef min_lod
= LLVMConstReal(LLVMFloatType(),
858 bld
->static_state
->min_lod
);
859 LLVMValueRef max_lod
= LLVMConstReal(LLVMFloatType(),
860 bld
->static_state
->max_lod
);
862 LLVMValueRef index0
= LLVMConstInt(LLVMInt32Type(), 0, 0);
863 LLVMValueRef index1
= LLVMConstInt(LLVMInt32Type(), 1, 0);
864 LLVMValueRef index2
= LLVMConstInt(LLVMInt32Type(), 2, 0);
866 LLVMValueRef s0
, s1
, s2
;
867 LLVMValueRef t0
, t1
, t2
;
868 LLVMValueRef r0
, r1
, r2
;
869 LLVMValueRef dsdx
, dsdy
, dtdx
, dtdy
, drdx
, drdy
;
870 LLVMValueRef rho
, lod
;
873 * dsdx = abs(s[1] - s[0]);
874 * dsdy = abs(s[2] - s[0]);
875 * dtdx = abs(t[1] - t[0]);
876 * dtdy = abs(t[2] - t[0]);
877 * drdx = abs(r[1] - r[0]);
878 * drdy = abs(r[2] - r[0]);
879 * XXX we're assuming a four-element quad in 2x2 layout here.
881 s0
= LLVMBuildExtractElement(bld
->builder
, s
, index0
, "s0");
882 s1
= LLVMBuildExtractElement(bld
->builder
, s
, index1
, "s1");
883 s2
= LLVMBuildExtractElement(bld
->builder
, s
, index2
, "s2");
884 dsdx
= LLVMBuildSub(bld
->builder
, s1
, s0
, "");
885 dsdx
= lp_build_abs(float_bld
, dsdx
);
886 dsdy
= LLVMBuildSub(bld
->builder
, s2
, s0
, "");
887 dsdy
= lp_build_abs(float_bld
, dsdy
);
889 t0
= LLVMBuildExtractElement(bld
->builder
, t
, index0
, "t0");
890 t1
= LLVMBuildExtractElement(bld
->builder
, t
, index1
, "t1");
891 t2
= LLVMBuildExtractElement(bld
->builder
, t
, index2
, "t2");
892 dtdx
= LLVMBuildSub(bld
->builder
, t1
, t0
, "");
893 dtdx
= lp_build_abs(float_bld
, dtdx
);
894 dtdy
= LLVMBuildSub(bld
->builder
, t2
, t0
, "");
895 dtdy
= lp_build_abs(float_bld
, dtdy
);
897 r0
= LLVMBuildExtractElement(bld
->builder
, r
, index0
, "r0");
898 r1
= LLVMBuildExtractElement(bld
->builder
, r
, index1
, "r1");
899 r2
= LLVMBuildExtractElement(bld
->builder
, r
, index2
, "r2");
900 drdx
= LLVMBuildSub(bld
->builder
, r1
, r0
, "");
901 drdx
= lp_build_abs(float_bld
, drdx
);
902 drdy
= LLVMBuildSub(bld
->builder
, r2
, r0
, "");
903 drdy
= lp_build_abs(float_bld
, drdy
);
907 /* Compute rho = max of all partial derivatives scaled by texture size.
908 * XXX this could be vectorized somewhat
910 rho
= LLVMBuildMul(bld
->builder
,
911 lp_build_max(float_bld
, dsdx
, dsdy
),
912 lp_build_int_to_float(float_bld
, width
), "");
915 max
= LLVMBuildMul(bld
->builder
,
916 lp_build_max(float_bld
, dtdx
, dtdy
),
917 lp_build_int_to_float(float_bld
, height
), "");
918 rho
= lp_build_max(float_bld
, rho
, max
);
920 max
= LLVMBuildMul(bld
->builder
,
921 lp_build_max(float_bld
, drdx
, drdy
),
922 lp_build_int_to_float(float_bld
, depth
), "");
923 rho
= lp_build_max(float_bld
, rho
, max
);
927 /* compute lod = log2(rho) */
928 lod
= lp_build_log2(float_bld
, rho
);
931 lod
= LLVMBuildAdd(bld
->builder
, lod
, lod_bias
, "LOD bias");
934 lod
= lp_build_clamp(float_bld
, lod
, min_lod
, max_lod
);
942 * For PIPE_TEX_MIPFILTER_NEAREST, convert float LOD to integer
943 * mipmap level index.
944 * Note: this is all scalar code.
945 * \param lod scalar float texture level of detail
946 * \param level_out returns integer
949 lp_build_nearest_mip_level(struct lp_build_sample_context
*bld
,
952 LLVMValueRef
*level_out
)
954 struct lp_build_context
*float_bld
= &bld
->float_bld
;
955 struct lp_build_context
*int_bld
= &bld
->int_bld
;
956 LLVMValueRef last_level
, level
;
958 LLVMValueRef zero
= LLVMConstInt(LLVMInt32Type(), 0, 0);
960 last_level
= bld
->dynamic_state
->last_level(bld
->dynamic_state
,
963 /* convert float lod to integer */
964 level
= lp_build_iround(float_bld
, lod
);
966 /* clamp level to legal range of levels */
967 *level_out
= lp_build_clamp(int_bld
, level
, zero
, last_level
);
972 * For PIPE_TEX_MIPFILTER_LINEAR, convert float LOD to integer to
973 * two (adjacent) mipmap level indexes. Later, we'll sample from those
974 * two mipmap levels and interpolate between them.
977 lp_build_linear_mip_levels(struct lp_build_sample_context
*bld
,
980 LLVMValueRef
*level0_out
,
981 LLVMValueRef
*level1_out
,
982 LLVMValueRef
*weight_out
)
984 struct lp_build_context
*float_bld
= &bld
->float_bld
;
985 struct lp_build_context
*int_bld
= &bld
->int_bld
;
986 LLVMValueRef last_level
, level
;
988 last_level
= bld
->dynamic_state
->last_level(bld
->dynamic_state
,
991 /* convert float lod to integer */
992 level
= lp_build_ifloor(float_bld
, lod
);
994 /* compute level 0 and clamp to legal range of levels */
995 *level0_out
= lp_build_clamp(int_bld
, level
,
998 /* compute level 1 and clamp to legal range of levels */
999 *level1_out
= lp_build_add(int_bld
, *level0_out
, int_bld
->one
);
1000 *level1_out
= lp_build_min(int_bld
, *level1_out
, last_level
);
1002 *weight_out
= lp_build_fract(float_bld
, lod
);
1007 * Generate code to sample a mipmap level with nearest filtering.
1008 * If sampling a cube texture, r = cube face in [0,5].
1011 lp_build_sample_image_nearest(struct lp_build_sample_context
*bld
,
1012 LLVMValueRef width_vec
,
1013 LLVMValueRef height_vec
,
1014 LLVMValueRef depth_vec
,
1015 LLVMValueRef row_stride_vec
,
1016 LLVMValueRef img_stride_vec
,
1017 LLVMValueRef data_ptr
,
1021 LLVMValueRef colors_out
[4])
1023 const int dims
= texture_dims(bld
->static_state
->target
);
1024 LLVMValueRef x
, y
, z
;
1027 * Compute integer texcoords.
1029 x
= lp_build_sample_wrap_nearest(bld
, s
, width_vec
,
1030 bld
->static_state
->pot_width
,
1031 bld
->static_state
->wrap_s
);
1032 lp_build_name(x
, "tex.x.wrapped");
1035 y
= lp_build_sample_wrap_nearest(bld
, t
, height_vec
,
1036 bld
->static_state
->pot_height
,
1037 bld
->static_state
->wrap_t
);
1038 lp_build_name(y
, "tex.y.wrapped");
1041 z
= lp_build_sample_wrap_nearest(bld
, r
, depth_vec
,
1042 bld
->static_state
->pot_height
,
1043 bld
->static_state
->wrap_r
);
1044 lp_build_name(z
, "tex.z.wrapped");
1046 else if (bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1058 * Get texture colors.
1060 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1062 row_stride_vec
, img_stride_vec
,
1063 data_ptr
, colors_out
);
1068 * Generate code to sample a mipmap level with linear filtering.
1069 * If sampling a cube texture, r = cube face in [0,5].
1072 lp_build_sample_image_linear(struct lp_build_sample_context
*bld
,
1073 LLVMValueRef width_vec
,
1074 LLVMValueRef height_vec
,
1075 LLVMValueRef depth_vec
,
1076 LLVMValueRef row_stride_vec
,
1077 LLVMValueRef img_stride_vec
,
1078 LLVMValueRef data_ptr
,
1082 LLVMValueRef colors_out
[4])
1084 const int dims
= texture_dims(bld
->static_state
->target
);
1085 LLVMValueRef x0
, y0
, z0
, x1
, y1
, z1
;
1086 LLVMValueRef s_fpart
, t_fpart
, r_fpart
;
1087 LLVMValueRef neighbors
[2][2][4];
1091 * Compute integer texcoords.
1093 lp_build_sample_wrap_linear(bld
, s
, width_vec
,
1094 bld
->static_state
->pot_width
,
1095 bld
->static_state
->wrap_s
,
1096 &x0
, &x1
, &s_fpart
);
1097 lp_build_name(x0
, "tex.x0.wrapped");
1098 lp_build_name(x1
, "tex.x1.wrapped");
1101 lp_build_sample_wrap_linear(bld
, t
, height_vec
,
1102 bld
->static_state
->pot_height
,
1103 bld
->static_state
->wrap_t
,
1104 &y0
, &y1
, &t_fpart
);
1105 lp_build_name(y0
, "tex.y0.wrapped");
1106 lp_build_name(y1
, "tex.y1.wrapped");
1109 lp_build_sample_wrap_linear(bld
, r
, depth_vec
,
1110 bld
->static_state
->pot_depth
,
1111 bld
->static_state
->wrap_r
,
1112 &z0
, &z1
, &r_fpart
);
1113 lp_build_name(z0
, "tex.z0.wrapped");
1114 lp_build_name(z1
, "tex.z1.wrapped");
1116 else if (bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1117 z0
= z1
= r
; /* cube face */
1126 y0
= y1
= t_fpart
= NULL
;
1127 z0
= z1
= r_fpart
= NULL
;
1131 * Get texture colors.
1133 /* get x0/x1 texels */
1134 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1136 row_stride_vec
, img_stride_vec
,
1137 data_ptr
, neighbors
[0][0]);
1138 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1140 row_stride_vec
, img_stride_vec
,
1141 data_ptr
, neighbors
[0][1]);
1144 /* Interpolate two samples from 1D image to produce one color */
1145 for (chan
= 0; chan
< 4; chan
++) {
1146 colors_out
[chan
] = lp_build_lerp(&bld
->texel_bld
, s_fpart
,
1147 neighbors
[0][0][chan
],
1148 neighbors
[0][1][chan
]);
1153 LLVMValueRef colors0
[4];
1155 /* get x0/x1 texels at y1 */
1156 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1158 row_stride_vec
, img_stride_vec
,
1159 data_ptr
, neighbors
[1][0]);
1160 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1162 row_stride_vec
, img_stride_vec
,
1163 data_ptr
, neighbors
[1][1]);
1165 /* Bilinear interpolate the four samples from the 2D image / 3D slice */
1166 for (chan
= 0; chan
< 4; chan
++) {
1167 colors0
[chan
] = lp_build_lerp_2d(&bld
->texel_bld
,
1169 neighbors
[0][0][chan
],
1170 neighbors
[0][1][chan
],
1171 neighbors
[1][0][chan
],
1172 neighbors
[1][1][chan
]);
1176 LLVMValueRef neighbors1
[2][2][4];
1177 LLVMValueRef colors1
[4];
1179 /* get x0/x1/y0/y1 texels at z1 */
1180 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1182 row_stride_vec
, img_stride_vec
,
1183 data_ptr
, neighbors1
[0][0]);
1184 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1186 row_stride_vec
, img_stride_vec
,
1187 data_ptr
, neighbors1
[0][1]);
1188 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1190 row_stride_vec
, img_stride_vec
,
1191 data_ptr
, neighbors1
[1][0]);
1192 lp_build_sample_texel_soa(bld
, width_vec
, height_vec
, depth_vec
,
1194 row_stride_vec
, img_stride_vec
,
1195 data_ptr
, neighbors1
[1][1]);
1197 /* Bilinear interpolate the four samples from the second Z slice */
1198 for (chan
= 0; chan
< 4; chan
++) {
1199 colors1
[chan
] = lp_build_lerp_2d(&bld
->texel_bld
,
1201 neighbors1
[0][0][chan
],
1202 neighbors1
[0][1][chan
],
1203 neighbors1
[1][0][chan
],
1204 neighbors1
[1][1][chan
]);
1207 /* Linearly interpolate the two samples from the two 3D slices */
1208 for (chan
= 0; chan
< 4; chan
++) {
1209 colors_out
[chan
] = lp_build_lerp(&bld
->texel_bld
,
1211 colors0
[chan
], colors1
[chan
]);
1216 for (chan
= 0; chan
< 4; chan
++) {
1217 colors_out
[chan
] = colors0
[chan
];
1224 /** Helper used by lp_build_cube_lookup() */
1226 lp_build_cube_ima(struct lp_build_context
*coord_bld
, LLVMValueRef coord
)
1228 /* ima = -0.5 / abs(coord); */
1229 LLVMValueRef negHalf
= lp_build_const_vec(coord_bld
->type
, -0.5);
1230 LLVMValueRef absCoord
= lp_build_abs(coord_bld
, coord
);
1231 LLVMValueRef ima
= lp_build_mul(coord_bld
, negHalf
,
1232 lp_build_rcp(coord_bld
, absCoord
));
1238 * Helper used by lp_build_cube_lookup()
1239 * \param sign scalar +1 or -1
1240 * \param coord float vector
1241 * \param ima float vector
1244 lp_build_cube_coord(struct lp_build_context
*coord_bld
,
1245 LLVMValueRef sign
, int negate_coord
,
1246 LLVMValueRef coord
, LLVMValueRef ima
)
1248 /* return negate(coord) * ima * sign + 0.5; */
1249 LLVMValueRef half
= lp_build_const_vec(coord_bld
->type
, 0.5);
1252 assert(negate_coord
== +1 || negate_coord
== -1);
1254 if (negate_coord
== -1) {
1255 coord
= lp_build_negate(coord_bld
, coord
);
1258 res
= lp_build_mul(coord_bld
, coord
, ima
);
1260 sign
= lp_build_broadcast_scalar(coord_bld
, sign
);
1261 res
= lp_build_mul(coord_bld
, res
, sign
);
1263 res
= lp_build_add(coord_bld
, res
, half
);
1269 /** Helper used by lp_build_cube_lookup()
1270 * Return (major_coord >= 0) ? pos_face : neg_face;
1273 lp_build_cube_face(struct lp_build_sample_context
*bld
,
1274 LLVMValueRef major_coord
,
1275 unsigned pos_face
, unsigned neg_face
)
1277 LLVMValueRef cmp
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
,
1279 bld
->float_bld
.zero
, "");
1280 LLVMValueRef pos
= LLVMConstInt(LLVMInt32Type(), pos_face
, 0);
1281 LLVMValueRef neg
= LLVMConstInt(LLVMInt32Type(), neg_face
, 0);
1282 LLVMValueRef res
= LLVMBuildSelect(bld
->builder
, cmp
, pos
, neg
, "");
1289 * Generate code to do cube face selection and per-face texcoords.
1292 lp_build_cube_lookup(struct lp_build_sample_context
*bld
,
1297 LLVMValueRef
*face_s
,
1298 LLVMValueRef
*face_t
)
1300 struct lp_build_context
*float_bld
= &bld
->float_bld
;
1301 struct lp_build_context
*coord_bld
= &bld
->coord_bld
;
1302 LLVMValueRef rx
, ry
, rz
;
1303 LLVMValueRef arx
, ary
, arz
;
1304 LLVMValueRef c25
= LLVMConstReal(LLVMFloatType(), 0.25);
1305 LLVMValueRef arx_ge_ary
, arx_ge_arz
;
1306 LLVMValueRef ary_ge_arx
, ary_ge_arz
;
1307 LLVMValueRef arx_ge_ary_arz
, ary_ge_arx_arz
;
1308 LLVMValueRef rx_pos
, ry_pos
, rz_pos
;
1310 assert(bld
->coord_bld
.type
.length
== 4);
1313 * Use the average of the four pixel's texcoords to choose the face.
1315 rx
= lp_build_mul(float_bld
, c25
,
1316 lp_build_sum_vector(&bld
->coord_bld
, s
));
1317 ry
= lp_build_mul(float_bld
, c25
,
1318 lp_build_sum_vector(&bld
->coord_bld
, t
));
1319 rz
= lp_build_mul(float_bld
, c25
,
1320 lp_build_sum_vector(&bld
->coord_bld
, r
));
1322 arx
= lp_build_abs(float_bld
, rx
);
1323 ary
= lp_build_abs(float_bld
, ry
);
1324 arz
= lp_build_abs(float_bld
, rz
);
1327 * Compare sign/magnitude of rx,ry,rz to determine face
1329 arx_ge_ary
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, arx
, ary
, "");
1330 arx_ge_arz
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, arx
, arz
, "");
1331 ary_ge_arx
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, ary
, arx
, "");
1332 ary_ge_arz
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, ary
, arz
, "");
1334 arx_ge_ary_arz
= LLVMBuildAnd(bld
->builder
, arx_ge_ary
, arx_ge_arz
, "");
1335 ary_ge_arx_arz
= LLVMBuildAnd(bld
->builder
, ary_ge_arx
, ary_ge_arz
, "");
1337 rx_pos
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, rx
, float_bld
->zero
, "");
1338 ry_pos
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, ry
, float_bld
->zero
, "");
1339 rz_pos
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
, rz
, float_bld
->zero
, "");
1342 struct lp_build_flow_context
*flow_ctx
;
1343 struct lp_build_if_state if_ctx
;
1345 flow_ctx
= lp_build_flow_create(bld
->builder
);
1346 lp_build_flow_scope_begin(flow_ctx
);
1348 *face_s
= bld
->coord_bld
.undef
;
1349 *face_t
= bld
->coord_bld
.undef
;
1350 *face
= bld
->int_bld
.undef
;
1352 lp_build_name(*face_s
, "face_s");
1353 lp_build_name(*face_t
, "face_t");
1354 lp_build_name(*face
, "face");
1356 lp_build_flow_scope_declare(flow_ctx
, face_s
);
1357 lp_build_flow_scope_declare(flow_ctx
, face_t
);
1358 lp_build_flow_scope_declare(flow_ctx
, face
);
1360 lp_build_if(&if_ctx
, flow_ctx
, bld
->builder
, arx_ge_ary_arz
);
1363 LLVMValueRef sign
= lp_build_sgn(float_bld
, rx
);
1364 LLVMValueRef ima
= lp_build_cube_ima(coord_bld
, s
);
1365 *face_s
= lp_build_cube_coord(coord_bld
, sign
, +1, r
, ima
);
1366 *face_t
= lp_build_cube_coord(coord_bld
, NULL
, +1, t
, ima
);
1367 *face
= lp_build_cube_face(bld
, rx
,
1368 PIPE_TEX_FACE_POS_X
,
1369 PIPE_TEX_FACE_NEG_X
);
1371 lp_build_else(&if_ctx
);
1373 struct lp_build_flow_context
*flow_ctx2
;
1374 struct lp_build_if_state if_ctx2
;
1376 LLVMValueRef face_s2
= bld
->coord_bld
.undef
;
1377 LLVMValueRef face_t2
= bld
->coord_bld
.undef
;
1378 LLVMValueRef face2
= bld
->int_bld
.undef
;
1380 flow_ctx2
= lp_build_flow_create(bld
->builder
);
1381 lp_build_flow_scope_begin(flow_ctx2
);
1382 lp_build_flow_scope_declare(flow_ctx2
, &face_s2
);
1383 lp_build_flow_scope_declare(flow_ctx2
, &face_t2
);
1384 lp_build_flow_scope_declare(flow_ctx2
, &face2
);
1386 ary_ge_arx_arz
= LLVMBuildAnd(bld
->builder
, ary_ge_arx
, ary_ge_arz
, "");
1388 lp_build_if(&if_ctx2
, flow_ctx2
, bld
->builder
, ary_ge_arx_arz
);
1391 LLVMValueRef sign
= lp_build_sgn(float_bld
, ry
);
1392 LLVMValueRef ima
= lp_build_cube_ima(coord_bld
, t
);
1393 face_s2
= lp_build_cube_coord(coord_bld
, NULL
, -1, s
, ima
);
1394 face_t2
= lp_build_cube_coord(coord_bld
, sign
, -1, r
, ima
);
1395 face2
= lp_build_cube_face(bld
, ry
,
1396 PIPE_TEX_FACE_POS_Y
,
1397 PIPE_TEX_FACE_NEG_Y
);
1399 lp_build_else(&if_ctx2
);
1402 LLVMValueRef sign
= lp_build_sgn(float_bld
, rz
);
1403 LLVMValueRef ima
= lp_build_cube_ima(coord_bld
, r
);
1404 face_s2
= lp_build_cube_coord(coord_bld
, sign
, -1, s
, ima
);
1405 face_t2
= lp_build_cube_coord(coord_bld
, NULL
, +1, t
, ima
);
1406 face2
= lp_build_cube_face(bld
, rz
,
1407 PIPE_TEX_FACE_POS_Z
,
1408 PIPE_TEX_FACE_NEG_Z
);
1410 lp_build_endif(&if_ctx2
);
1411 lp_build_flow_scope_end(flow_ctx2
);
1412 lp_build_flow_destroy(flow_ctx2
);
1419 lp_build_endif(&if_ctx
);
1420 lp_build_flow_scope_end(flow_ctx
);
1421 lp_build_flow_destroy(flow_ctx
);
1428 * Sample the texture/mipmap using given image filter and mip filter.
1429 * data0_ptr and data1_ptr point to the two mipmap levels to sample
1430 * from. width0/1_vec, height0/1_vec, depth0/1_vec indicate their sizes.
1431 * If we're using nearest miplevel sampling the '1' values will be null/unused.
1434 lp_build_sample_mipmap(struct lp_build_sample_context
*bld
,
1435 unsigned img_filter
,
1436 unsigned mip_filter
,
1440 LLVMValueRef lod_fpart
,
1441 LLVMValueRef width0_vec
,
1442 LLVMValueRef width1_vec
,
1443 LLVMValueRef height0_vec
,
1444 LLVMValueRef height1_vec
,
1445 LLVMValueRef depth0_vec
,
1446 LLVMValueRef depth1_vec
,
1447 LLVMValueRef row_stride0_vec
,
1448 LLVMValueRef row_stride1_vec
,
1449 LLVMValueRef img_stride0_vec
,
1450 LLVMValueRef img_stride1_vec
,
1451 LLVMValueRef data_ptr0
,
1452 LLVMValueRef data_ptr1
,
1453 LLVMValueRef
*colors_out
)
1455 LLVMValueRef colors0
[4], colors1
[4];
1458 if (img_filter
== PIPE_TEX_FILTER_NEAREST
) {
1459 lp_build_sample_image_nearest(bld
,
1460 width0_vec
, height0_vec
, depth0_vec
,
1461 row_stride0_vec
, img_stride0_vec
,
1462 data_ptr0
, s
, t
, r
, colors0
);
1464 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1465 /* sample the second mipmap level, and interp */
1466 lp_build_sample_image_nearest(bld
,
1467 width1_vec
, height1_vec
, depth1_vec
,
1468 row_stride1_vec
, img_stride1_vec
,
1469 data_ptr1
, s
, t
, r
, colors1
);
1473 assert(img_filter
== PIPE_TEX_FILTER_LINEAR
);
1475 lp_build_sample_image_linear(bld
,
1476 width0_vec
, height0_vec
, depth0_vec
,
1477 row_stride0_vec
, img_stride0_vec
,
1478 data_ptr0
, s
, t
, r
, colors0
);
1480 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1481 /* sample the second mipmap level, and interp */
1482 lp_build_sample_image_linear(bld
,
1483 width1_vec
, height1_vec
, depth1_vec
,
1484 row_stride1_vec
, img_stride1_vec
,
1485 data_ptr1
, s
, t
, r
, colors1
);
1489 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1490 /* interpolate samples from the two mipmap levels */
1491 for (chan
= 0; chan
< 4; chan
++) {
1492 colors_out
[chan
] = lp_build_lerp(&bld
->texel_bld
, lod_fpart
,
1493 colors0
[chan
], colors1
[chan
]);
1497 /* use first/only level's colors */
1498 for (chan
= 0; chan
< 4; chan
++) {
1499 colors_out
[chan
] = colors0
[chan
];
1507 * General texture sampling codegen.
1508 * This function handles texture sampling for all texture targets (1D,
1509 * 2D, 3D, cube) and all filtering modes.
1512 lp_build_sample_general(struct lp_build_sample_context
*bld
,
1518 LLVMValueRef height
,
1520 LLVMValueRef width_vec
,
1521 LLVMValueRef height_vec
,
1522 LLVMValueRef depth_vec
,
1523 LLVMValueRef row_stride_array
,
1524 LLVMValueRef img_stride_vec
,
1525 LLVMValueRef data_array
,
1526 LLVMValueRef
*colors_out
)
1528 struct lp_build_context
*float_bld
= &bld
->float_bld
;
1529 const unsigned mip_filter
= bld
->static_state
->min_mip_filter
;
1530 const unsigned min_filter
= bld
->static_state
->min_img_filter
;
1531 const unsigned mag_filter
= bld
->static_state
->mag_img_filter
;
1532 const int dims
= texture_dims(bld
->static_state
->target
);
1533 LLVMValueRef lod
, lod_fpart
;
1534 LLVMValueRef ilevel0
, ilevel1
, ilevel0_vec
, ilevel1_vec
;
1535 LLVMValueRef width0_vec
= NULL
, height0_vec
= NULL
, depth0_vec
= NULL
;
1536 LLVMValueRef width1_vec
= NULL
, height1_vec
= NULL
, depth1_vec
= NULL
;
1537 LLVMValueRef row_stride0_vec
= NULL
, row_stride1_vec
= NULL
;
1538 LLVMValueRef img_stride0_vec
= NULL
, img_stride1_vec
= NULL
;
1539 LLVMValueRef data_ptr0
, data_ptr1
;
1542 printf("%s mip %d min %d mag %d\n", __FUNCTION__,
1543 mip_filter, min_filter, mag_filter);
1547 * Compute the level of detail (float).
1549 if (min_filter
!= mag_filter
||
1550 mip_filter
!= PIPE_TEX_MIPFILTER_NONE
) {
1551 /* Need to compute lod either to choose mipmap levels or to
1552 * distinguish between minification/magnification with one mipmap level.
1554 lod
= lp_build_lod_selector(bld
, s
, t
, r
, width
, height
, depth
);
1558 * Compute integer mipmap level(s) to fetch texels from.
1560 if (mip_filter
== PIPE_TEX_MIPFILTER_NONE
) {
1561 /* always use mip level 0 */
1562 ilevel0
= LLVMConstInt(LLVMInt32Type(), 0, 0);
1565 if (mip_filter
== PIPE_TEX_MIPFILTER_NEAREST
) {
1566 lp_build_nearest_mip_level(bld
, unit
, lod
, &ilevel0
);
1569 assert(mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
);
1570 lp_build_linear_mip_levels(bld
, unit
, lod
, &ilevel0
, &ilevel1
,
1572 lod_fpart
= lp_build_broadcast_scalar(&bld
->coord_bld
, lod_fpart
);
1577 * Convert scalar integer mipmap levels into vectors.
1579 ilevel0_vec
= lp_build_broadcast_scalar(&bld
->int_coord_bld
, ilevel0
);
1580 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
)
1581 ilevel1_vec
= lp_build_broadcast_scalar(&bld
->int_coord_bld
, ilevel1
);
1584 * Compute width, height at mipmap level 'ilevel0'
1586 width0_vec
= lp_build_minify(bld
, width_vec
, ilevel0_vec
);
1588 height0_vec
= lp_build_minify(bld
, height_vec
, ilevel0_vec
);
1589 row_stride0_vec
= lp_build_get_level_stride_vec(bld
, row_stride_array
,
1591 if (dims
== 3 || bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1592 img_stride0_vec
= lp_build_mul(&bld
->int_coord_bld
,
1593 row_stride0_vec
, height0_vec
);
1595 depth0_vec
= lp_build_minify(bld
, depth_vec
, ilevel0_vec
);
1599 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1600 /* compute width, height, depth for second mipmap level at 'ilevel1' */
1601 width1_vec
= lp_build_minify(bld
, width_vec
, ilevel1_vec
);
1603 height1_vec
= lp_build_minify(bld
, height_vec
, ilevel1_vec
);
1604 row_stride1_vec
= lp_build_get_level_stride_vec(bld
, row_stride_array
,
1606 if (dims
== 3 || bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1607 img_stride1_vec
= lp_build_mul(&bld
->int_coord_bld
,
1608 row_stride1_vec
, height1_vec
);
1610 depth1_vec
= lp_build_minify(bld
, depth_vec
, ilevel1_vec
);
1617 * Choose cube face, recompute per-face texcoords.
1619 if (bld
->static_state
->target
== PIPE_TEXTURE_CUBE
) {
1620 LLVMValueRef face
, face_s
, face_t
;
1621 lp_build_cube_lookup(bld
, s
, t
, r
, &face
, &face_s
, &face_t
);
1622 s
= face_s
; /* vec */
1623 t
= face_t
; /* vec */
1624 /* use 'r' to indicate cube face */
1625 r
= lp_build_broadcast_scalar(&bld
->int_coord_bld
, face
); /* vec */
1629 * Get pointer(s) to image data for mipmap level(s).
1631 data_ptr0
= lp_build_get_mipmap_level(bld
, data_array
, ilevel0
);
1632 if (mip_filter
== PIPE_TEX_MIPFILTER_LINEAR
) {
1633 data_ptr1
= lp_build_get_mipmap_level(bld
, data_array
, ilevel1
);
1637 * Get/interpolate texture colors.
1639 if (min_filter
== mag_filter
) {
1640 /* no need to distinquish between minification and magnification */
1641 lp_build_sample_mipmap(bld
, min_filter
, mip_filter
, s
, t
, r
, lod_fpart
,
1642 width0_vec
, width1_vec
,
1643 height0_vec
, height1_vec
,
1644 depth0_vec
, depth1_vec
,
1645 row_stride0_vec
, row_stride1_vec
,
1646 img_stride0_vec
, img_stride1_vec
,
1647 data_ptr0
, data_ptr1
,
1651 /* Emit conditional to choose min image filter or mag image filter
1652 * depending on the lod being >0 or <= 0, respectively.
1654 struct lp_build_flow_context
*flow_ctx
;
1655 struct lp_build_if_state if_ctx
;
1656 LLVMValueRef minify
;
1658 flow_ctx
= lp_build_flow_create(bld
->builder
);
1659 lp_build_flow_scope_begin(flow_ctx
);
1661 lp_build_flow_scope_declare(flow_ctx
, &colors_out
[0]);
1662 lp_build_flow_scope_declare(flow_ctx
, &colors_out
[1]);
1663 lp_build_flow_scope_declare(flow_ctx
, &colors_out
[2]);
1664 lp_build_flow_scope_declare(flow_ctx
, &colors_out
[3]);
1666 /* minify = lod > 0.0 */
1667 minify
= LLVMBuildFCmp(bld
->builder
, LLVMRealUGE
,
1668 lod
, float_bld
->zero
, "");
1670 lp_build_if(&if_ctx
, flow_ctx
, bld
->builder
, minify
);
1672 /* Use the minification filter */
1673 lp_build_sample_mipmap(bld
, min_filter
, mip_filter
,
1675 width0_vec
, width1_vec
,
1676 height0_vec
, height1_vec
,
1677 depth0_vec
, depth1_vec
,
1678 row_stride0_vec
, row_stride1_vec
,
1679 img_stride0_vec
, img_stride1_vec
,
1680 data_ptr0
, data_ptr1
,
1683 lp_build_else(&if_ctx
);
1685 /* Use the magnification filter */
1686 lp_build_sample_mipmap(bld
, mag_filter
, mip_filter
,
1688 width0_vec
, width1_vec
,
1689 height0_vec
, height1_vec
,
1690 depth0_vec
, depth1_vec
,
1691 row_stride0_vec
, row_stride1_vec
,
1692 img_stride0_vec
, img_stride1_vec
,
1693 data_ptr0
, data_ptr1
,
1696 lp_build_endif(&if_ctx
);
1698 lp_build_flow_scope_end(flow_ctx
);
1699 lp_build_flow_destroy(flow_ctx
);
1706 lp_build_rgba8_to_f32_soa(LLVMBuilderRef builder
,
1707 struct lp_type dst_type
,
1708 LLVMValueRef packed
,
1711 LLVMValueRef mask
= lp_build_const_int_vec(dst_type
, 0xff);
1714 /* Decode the input vector components */
1715 for (chan
= 0; chan
< 4; ++chan
) {
1716 unsigned start
= chan
*8;
1717 unsigned stop
= start
+ 8;
1723 input
= LLVMBuildLShr(builder
, input
, lp_build_const_int_vec(dst_type
, start
), "");
1726 input
= LLVMBuildAnd(builder
, input
, mask
, "");
1728 input
= lp_build_unsigned_norm_to_float(builder
, 8, dst_type
, input
);
1736 lp_build_sample_2d_linear_aos(struct lp_build_sample_context
*bld
,
1740 LLVMValueRef height
,
1741 LLVMValueRef stride_array
,
1742 LLVMValueRef data_array
,
1743 LLVMValueRef
*texel
)
1745 LLVMBuilderRef builder
= bld
->builder
;
1746 struct lp_build_context i32
, h16
, u8n
;
1747 LLVMTypeRef i32_vec_type
, h16_vec_type
, u8n_vec_type
;
1748 LLVMValueRef i32_c8
, i32_c128
, i32_c255
;
1749 LLVMValueRef s_ipart
, s_fpart
, s_fpart_lo
, s_fpart_hi
;
1750 LLVMValueRef t_ipart
, t_fpart
, t_fpart_lo
, t_fpart_hi
;
1751 LLVMValueRef x0
, x1
;
1752 LLVMValueRef y0
, y1
;
1753 LLVMValueRef neighbors
[2][2];
1754 LLVMValueRef neighbors_lo
[2][2];
1755 LLVMValueRef neighbors_hi
[2][2];
1756 LLVMValueRef packed
, packed_lo
, packed_hi
;
1757 LLVMValueRef unswizzled
[4];
1758 LLVMValueRef stride
;
1760 lp_build_context_init(&i32
, builder
, lp_type_int_vec(32));
1761 lp_build_context_init(&h16
, builder
, lp_type_ufixed(16));
1762 lp_build_context_init(&u8n
, builder
, lp_type_unorm(8));
1764 i32_vec_type
= lp_build_vec_type(i32
.type
);
1765 h16_vec_type
= lp_build_vec_type(h16
.type
);
1766 u8n_vec_type
= lp_build_vec_type(u8n
.type
);
1768 if (bld
->static_state
->normalized_coords
) {
1769 LLVMTypeRef coord_vec_type
= lp_build_vec_type(bld
->coord_type
);
1770 LLVMValueRef fp_width
= LLVMBuildSIToFP(bld
->builder
, width
, coord_vec_type
, "");
1771 LLVMValueRef fp_height
= LLVMBuildSIToFP(bld
->builder
, height
, coord_vec_type
, "");
1772 s
= lp_build_mul(&bld
->coord_bld
, s
, fp_width
);
1773 t
= lp_build_mul(&bld
->coord_bld
, t
, fp_height
);
1776 /* scale coords by 256 (8 fractional bits) */
1777 s
= lp_build_mul_imm(&bld
->coord_bld
, s
, 256);
1778 t
= lp_build_mul_imm(&bld
->coord_bld
, t
, 256);
1780 /* convert float to int */
1781 s
= LLVMBuildFPToSI(builder
, s
, i32_vec_type
, "");
1782 t
= LLVMBuildFPToSI(builder
, t
, i32_vec_type
, "");
1784 /* subtract 0.5 (add -128) */
1785 i32_c128
= lp_build_const_int_vec(i32
.type
, -128);
1786 s
= LLVMBuildAdd(builder
, s
, i32_c128
, "");
1787 t
= LLVMBuildAdd(builder
, t
, i32_c128
, "");
1789 /* compute floor (shift right 8) */
1790 i32_c8
= lp_build_const_int_vec(i32
.type
, 8);
1791 s_ipart
= LLVMBuildAShr(builder
, s
, i32_c8
, "");
1792 t_ipart
= LLVMBuildAShr(builder
, t
, i32_c8
, "");
1794 /* compute fractional part (AND with 0xff) */
1795 i32_c255
= lp_build_const_int_vec(i32
.type
, 255);
1796 s_fpart
= LLVMBuildAnd(builder
, s
, i32_c255
, "");
1797 t_fpart
= LLVMBuildAnd(builder
, t
, i32_c255
, "");
1802 x1
= lp_build_add(&bld
->int_coord_bld
, x0
, bld
->int_coord_bld
.one
);
1803 y1
= lp_build_add(&bld
->int_coord_bld
, y0
, bld
->int_coord_bld
.one
);
1805 x0
= lp_build_sample_wrap_int(bld
, x0
, width
, bld
->static_state
->pot_width
,
1806 bld
->static_state
->wrap_s
);
1807 y0
= lp_build_sample_wrap_int(bld
, y0
, height
, bld
->static_state
->pot_height
,
1808 bld
->static_state
->wrap_t
);
1810 x1
= lp_build_sample_wrap_int(bld
, x1
, width
, bld
->static_state
->pot_width
,
1811 bld
->static_state
->wrap_s
);
1812 y1
= lp_build_sample_wrap_int(bld
, y1
, height
, bld
->static_state
->pot_height
,
1813 bld
->static_state
->wrap_t
);
1816 * Transform 4 x i32 in
1818 * s_fpart = {s0, s1, s2, s3}
1822 * s_fpart = {00, s0, 00, s1, 00, s2, 00, s3}
1826 * s_fpart_lo = {s0, s0, s0, s0, s1, s1, s1, s1}
1827 * s_fpart_hi = {s2, s2, s2, s2, s3, s3, s3, s3}
1829 * and likewise for t_fpart. There is no risk of loosing precision here
1830 * since the fractional parts only use the lower 8bits.
1833 s_fpart
= LLVMBuildBitCast(builder
, s_fpart
, h16_vec_type
, "");
1834 t_fpart
= LLVMBuildBitCast(builder
, t_fpart
, h16_vec_type
, "");
1837 LLVMTypeRef elem_type
= LLVMInt32Type();
1838 LLVMValueRef shuffles_lo
[LP_MAX_VECTOR_LENGTH
];
1839 LLVMValueRef shuffles_hi
[LP_MAX_VECTOR_LENGTH
];
1840 LLVMValueRef shuffle_lo
;
1841 LLVMValueRef shuffle_hi
;
1844 for(j
= 0; j
< h16
.type
.length
; j
+= 4) {
1845 unsigned subindex
= util_cpu_caps
.little_endian
? 0 : 1;
1848 index
= LLVMConstInt(elem_type
, j
/2 + subindex
, 0);
1849 for(i
= 0; i
< 4; ++i
)
1850 shuffles_lo
[j
+ i
] = index
;
1852 index
= LLVMConstInt(elem_type
, h16
.type
.length
/2 + j
/2 + subindex
, 0);
1853 for(i
= 0; i
< 4; ++i
)
1854 shuffles_hi
[j
+ i
] = index
;
1857 shuffle_lo
= LLVMConstVector(shuffles_lo
, h16
.type
.length
);
1858 shuffle_hi
= LLVMConstVector(shuffles_hi
, h16
.type
.length
);
1860 s_fpart_lo
= LLVMBuildShuffleVector(builder
, s_fpart
, h16
.undef
, shuffle_lo
, "");
1861 t_fpart_lo
= LLVMBuildShuffleVector(builder
, t_fpart
, h16
.undef
, shuffle_lo
, "");
1862 s_fpart_hi
= LLVMBuildShuffleVector(builder
, s_fpart
, h16
.undef
, shuffle_hi
, "");
1863 t_fpart_hi
= LLVMBuildShuffleVector(builder
, t_fpart
, h16
.undef
, shuffle_hi
, "");
1866 stride
= lp_build_get_const_level_stride_vec(bld
, stride_array
, 0);
1869 * Fetch the pixels as 4 x 32bit (rgba order might differ):
1871 * rgba0 rgba1 rgba2 rgba3
1873 * bit cast them into 16 x u8
1875 * r0 g0 b0 a0 r1 g1 b1 a1 r2 g2 b2 a2 r3 g3 b3 a3
1877 * unpack them into two 8 x i16:
1879 * r0 g0 b0 a0 r1 g1 b1 a1
1880 * r2 g2 b2 a2 r3 g3 b3 a3
1882 * The higher 8 bits of the resulting elements will be zero.
1885 neighbors
[0][0] = lp_build_sample_packed(bld
, x0
, y0
, stride
, data_array
);
1886 neighbors
[0][1] = lp_build_sample_packed(bld
, x1
, y0
, stride
, data_array
);
1887 neighbors
[1][0] = lp_build_sample_packed(bld
, x0
, y1
, stride
, data_array
);
1888 neighbors
[1][1] = lp_build_sample_packed(bld
, x1
, y1
, stride
, data_array
);
1890 neighbors
[0][0] = LLVMBuildBitCast(builder
, neighbors
[0][0], u8n_vec_type
, "");
1891 neighbors
[0][1] = LLVMBuildBitCast(builder
, neighbors
[0][1], u8n_vec_type
, "");
1892 neighbors
[1][0] = LLVMBuildBitCast(builder
, neighbors
[1][0], u8n_vec_type
, "");
1893 neighbors
[1][1] = LLVMBuildBitCast(builder
, neighbors
[1][1], u8n_vec_type
, "");
1895 lp_build_unpack2(builder
, u8n
.type
, h16
.type
, neighbors
[0][0], &neighbors_lo
[0][0], &neighbors_hi
[0][0]);
1896 lp_build_unpack2(builder
, u8n
.type
, h16
.type
, neighbors
[0][1], &neighbors_lo
[0][1], &neighbors_hi
[0][1]);
1897 lp_build_unpack2(builder
, u8n
.type
, h16
.type
, neighbors
[1][0], &neighbors_lo
[1][0], &neighbors_hi
[1][0]);
1898 lp_build_unpack2(builder
, u8n
.type
, h16
.type
, neighbors
[1][1], &neighbors_lo
[1][1], &neighbors_hi
[1][1]);
1901 * Linear interpolate with 8.8 fixed point.
1904 packed_lo
= lp_build_lerp_2d(&h16
,
1905 s_fpart_lo
, t_fpart_lo
,
1909 neighbors_lo
[1][1]);
1911 packed_hi
= lp_build_lerp_2d(&h16
,
1912 s_fpart_hi
, t_fpart_hi
,
1916 neighbors_hi
[1][1]);
1918 packed
= lp_build_pack2(builder
, h16
.type
, u8n
.type
, packed_lo
, packed_hi
);
1921 * Convert to SoA and swizzle.
1924 packed
= LLVMBuildBitCast(builder
, packed
, i32_vec_type
, "");
1926 lp_build_rgba8_to_f32_soa(bld
->builder
,
1928 packed
, unswizzled
);
1930 lp_build_format_swizzle_soa(bld
->format_desc
,
1931 bld
->texel_type
, unswizzled
,
1937 lp_build_sample_compare(struct lp_build_sample_context
*bld
,
1939 LLVMValueRef
*texel
)
1941 struct lp_build_context
*texel_bld
= &bld
->texel_bld
;
1945 if(bld
->static_state
->compare_mode
== PIPE_TEX_COMPARE_NONE
)
1948 /* TODO: Compare before swizzling, to avoid redundant computations */
1950 for(chan
= 0; chan
< 4; ++chan
) {
1952 cmp
= lp_build_cmp(texel_bld
, bld
->static_state
->compare_func
, p
, texel
[chan
]);
1953 cmp
= lp_build_select(texel_bld
, cmp
, texel_bld
->one
, texel_bld
->zero
);
1956 res
= lp_build_add(texel_bld
, res
, cmp
);
1962 res
= lp_build_mul(texel_bld
, res
, lp_build_const_vec(texel_bld
->type
, 0.25));
1964 /* XXX returning result for default GL_DEPTH_TEXTURE_MODE = GL_LUMINANCE */
1965 for(chan
= 0; chan
< 3; ++chan
)
1967 texel
[3] = texel_bld
->one
;
1972 * Build texture sampling code.
1973 * 'texel' will return a vector of four LLVMValueRefs corresponding to
1975 * \param type vector float type to use for coords, etc.
1978 lp_build_sample_soa(LLVMBuilderRef builder
,
1979 const struct lp_sampler_static_state
*static_state
,
1980 struct lp_sampler_dynamic_state
*dynamic_state
,
1981 struct lp_type type
,
1983 unsigned num_coords
,
1984 const LLVMValueRef
*coords
,
1985 LLVMValueRef lodbias
,
1986 LLVMValueRef
*texel
)
1988 struct lp_build_sample_context bld
;
1989 LLVMValueRef width
, width_vec
;
1990 LLVMValueRef height
, height_vec
;
1991 LLVMValueRef depth
, depth_vec
;
1992 LLVMValueRef stride_array
;
1993 LLVMValueRef data_array
;
1998 (void) lp_build_lod_selector
; /* temporary to silence warning */
1999 (void) lp_build_nearest_mip_level
;
2000 (void) lp_build_linear_mip_levels
;
2001 (void) lp_build_minify
;
2003 /* Setup our build context */
2004 memset(&bld
, 0, sizeof bld
);
2005 bld
.builder
= builder
;
2006 bld
.static_state
= static_state
;
2007 bld
.dynamic_state
= dynamic_state
;
2008 bld
.format_desc
= util_format_description(static_state
->format
);
2010 bld
.float_type
= lp_type_float(32);
2011 bld
.int_type
= lp_type_int(32);
2012 bld
.coord_type
= type
;
2013 bld
.uint_coord_type
= lp_uint_type(type
);
2014 bld
.int_coord_type
= lp_int_type(type
);
2015 bld
.texel_type
= type
;
2017 lp_build_context_init(&bld
.float_bld
, builder
, bld
.float_type
);
2018 lp_build_context_init(&bld
.int_bld
, builder
, bld
.int_type
);
2019 lp_build_context_init(&bld
.coord_bld
, builder
, bld
.coord_type
);
2020 lp_build_context_init(&bld
.uint_coord_bld
, builder
, bld
.uint_coord_type
);
2021 lp_build_context_init(&bld
.int_coord_bld
, builder
, bld
.int_coord_type
);
2022 lp_build_context_init(&bld
.texel_bld
, builder
, bld
.texel_type
);
2024 /* Get the dynamic state */
2025 width
= dynamic_state
->width(dynamic_state
, builder
, unit
);
2026 height
= dynamic_state
->height(dynamic_state
, builder
, unit
);
2027 depth
= dynamic_state
->depth(dynamic_state
, builder
, unit
);
2028 stride_array
= dynamic_state
->row_stride(dynamic_state
, builder
, unit
);
2029 data_array
= dynamic_state
->data_ptr(dynamic_state
, builder
, unit
);
2030 /* Note that data_array is an array[level] of pointers to texture images */
2036 width_vec
= lp_build_broadcast_scalar(&bld
.uint_coord_bld
, width
);
2037 height_vec
= lp_build_broadcast_scalar(&bld
.uint_coord_bld
, height
);
2038 depth_vec
= lp_build_broadcast_scalar(&bld
.uint_coord_bld
, depth
);
2040 if (lp_format_is_rgba8(bld
.format_desc
) &&
2041 static_state
->target
== PIPE_TEXTURE_2D
&&
2042 static_state
->min_img_filter
== PIPE_TEX_FILTER_LINEAR
&&
2043 static_state
->mag_img_filter
== PIPE_TEX_FILTER_LINEAR
&&
2044 static_state
->min_mip_filter
== PIPE_TEX_MIPFILTER_NONE
&&
2045 is_simple_wrap_mode(static_state
->wrap_s
) &&
2046 is_simple_wrap_mode(static_state
->wrap_t
)) {
2048 lp_build_sample_2d_linear_aos(&bld
, s
, t
, width_vec
, height_vec
,
2049 stride_array
, data_array
, texel
);
2052 lp_build_sample_general(&bld
, unit
, s
, t
, r
,
2053 width
, height
, depth
,
2054 width_vec
, height_vec
, depth_vec
,
2055 stride_array
, NULL
, data_array
,
2059 lp_build_sample_compare(&bld
, r
, texel
);