1 /**************************************************************************
3 * Copyright 2010 VMware.
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 **************************************************************************/
29 #include "util/u_math.h"
30 #include "util/u_memory.h"
31 #include "util/simple_list.h"
32 #include "os/os_time.h"
33 #include "gallivm/lp_bld_arit.h"
34 #include "gallivm/lp_bld_bitarit.h"
35 #include "gallivm/lp_bld_const.h"
36 #include "gallivm/lp_bld_debug.h"
37 #include "gallivm/lp_bld_init.h"
38 #include "gallivm/lp_bld_logic.h"
39 #include "gallivm/lp_bld_intr.h"
40 #include "gallivm/lp_bld_flow.h"
41 #include "gallivm/lp_bld_type.h"
46 #include "lp_screen.h"
47 #include "lp_context.h"
49 #include "lp_state_fs.h"
50 #include "lp_state_setup.h"
53 /** Setup shader number (for debugging) */
54 static unsigned setup_no
= 0;
57 /* currently organized to interpolate full float[4] attributes even
58 * when some elements are unused. Later, can pack vertex data more
65 /* Function arguments:
70 LLVMValueRef facing
; /* boolean */
77 LLVMValueRef x0_center
;
78 LLVMValueRef y0_center
;
79 LLVMValueRef dy20_ooa
;
80 LLVMValueRef dy01_ooa
;
81 LLVMValueRef dx20_ooa
;
82 LLVMValueRef dx01_ooa
;
83 struct lp_build_context bld
;
88 store_coef(struct gallivm_state
*gallivm
,
89 struct lp_setup_args
*args
,
95 LLVMBuilderRef builder
= gallivm
->builder
;
96 LLVMValueRef idx
= lp_build_const_int32(gallivm
, slot
);
98 LLVMBuildStore(builder
,
100 LLVMBuildGEP(builder
, args
->a0
, &idx
, 1, ""));
102 LLVMBuildStore(builder
,
104 LLVMBuildGEP(builder
, args
->dadx
, &idx
, 1, ""));
106 LLVMBuildStore(builder
,
108 LLVMBuildGEP(builder
, args
->dady
, &idx
, 1, ""));
114 emit_constant_coef4(struct gallivm_state
*gallivm
,
115 struct lp_setup_args
*args
,
119 store_coef(gallivm
, args
, slot
, vert
, args
->bld
.zero
, args
->bld
.zero
);
125 * Setup the fragment input attribute with the front-facing value.
126 * \param frontface is the triangle front facing?
129 emit_facing_coef(struct gallivm_state
*gallivm
,
130 struct lp_setup_args
*args
,
133 LLVMBuilderRef builder
= gallivm
->builder
;
134 LLVMTypeRef float_type
= LLVMFloatTypeInContext(gallivm
->context
);
135 LLVMValueRef a0_0
= args
->facing
;
136 LLVMValueRef a0_0f
= LLVMBuildSIToFP(builder
, a0_0
, float_type
, "");
137 LLVMValueRef a0
, face_val
;
138 const unsigned char swizzles
[4] = { PIPE_SWIZZLE_X
, PIPE_SWIZZLE_0
,
139 PIPE_SWIZZLE_0
, PIPE_SWIZZLE_0
};
140 /* Our face val is either 1 or 0 so we do
141 * face = (val * 2) - 1
145 LLVMBuildFAdd(builder
,
146 LLVMBuildFMul(builder
, a0_0f
,
147 lp_build_const_float(gallivm
, 2.0),
149 lp_build_const_float(gallivm
, -1.0),
151 face_val
= lp_build_broadcast_scalar(&args
->bld
, face_val
);
152 a0
= lp_build_swizzle_aos(&args
->bld
, face_val
, swizzles
);
154 store_coef(gallivm
, args
, slot
, a0
, args
->bld
.zero
, args
->bld
.zero
);
159 vert_attrib(struct gallivm_state
*gallivm
,
165 LLVMBuilderRef b
= gallivm
->builder
;
167 idx
[0] = lp_build_const_int32(gallivm
, attr
);
168 idx
[1] = lp_build_const_int32(gallivm
, elem
);
169 return LLVMBuildLoad(b
, LLVMBuildGEP(b
, vert
, idx
, 2, ""), name
);
174 lp_twoside(struct gallivm_state
*gallivm
,
175 struct lp_setup_args
*args
,
176 const struct lp_setup_variant_key
*key
,
178 LLVMValueRef attribv
[3])
180 LLVMBuilderRef b
= gallivm
->builder
;
181 LLVMValueRef a0_back
, a1_back
, a2_back
;
182 LLVMValueRef idx2
= lp_build_const_int32(gallivm
, bcolor_slot
);
184 LLVMValueRef facing
= args
->facing
;
185 LLVMValueRef front_facing
= LLVMBuildICmp(b
, LLVMIntEQ
, facing
,
186 lp_build_const_int32(gallivm
, 0), ""); /** need i1 for if condition */
188 a0_back
= LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v0
, &idx2
, 1, ""), "v0a_back");
189 a1_back
= LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v1
, &idx2
, 1, ""), "v1a_back");
190 a2_back
= LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v2
, &idx2
, 1, ""), "v2a_back");
192 /* Possibly swap the front and back attrib values,
194 * Prefer select to if so we don't have to worry about phis or
197 attribv
[0] = LLVMBuildSelect(b
, front_facing
, a0_back
, attribv
[0], "");
198 attribv
[1] = LLVMBuildSelect(b
, front_facing
, a1_back
, attribv
[1], "");
199 attribv
[2] = LLVMBuildSelect(b
, front_facing
, a2_back
, attribv
[2], "");
204 lp_do_offset_tri(struct gallivm_state
*gallivm
,
205 struct lp_setup_args
*args
,
206 const struct lp_setup_variant_key
*key
,
207 LLVMValueRef inv_det
,
210 LLVMValueRef attribv
[3])
212 LLVMBuilderRef b
= gallivm
->builder
;
213 struct lp_build_context flt_scalar_bld
;
214 struct lp_build_context int_scalar_bld
;
215 struct lp_build_context
*bld
= &args
->bld
;
216 LLVMValueRef zoffset
, mult
;
217 LLVMValueRef z0_new
, z1_new
, z2_new
;
218 LLVMValueRef dzdxdzdy
, dzdx
, dzdy
, dzxyz20
, dyzzx01
, dyzzx01_dzxyz20
, dzx01_dyz20
;
219 LLVMValueRef z0z1
, z0z1z2
;
220 LLVMValueRef max
, max_value
, res12
;
221 LLVMValueRef shuffles
[4];
222 LLVMTypeRef shuf_type
= LLVMInt32TypeInContext(gallivm
->context
);
223 LLVMValueRef onei
= lp_build_const_int32(gallivm
, 1);
224 LLVMValueRef zeroi
= lp_build_const_int32(gallivm
, 0);
225 LLVMValueRef twoi
= lp_build_const_int32(gallivm
, 2);
226 LLVMValueRef threei
= lp_build_const_int32(gallivm
, 3);
228 /* (res12) = cross(e,f).xy */
233 dzxyz20
= LLVMBuildShuffleVector(b
, dxyz20
, dxyz20
, LLVMConstVector(shuffles
, 4), "");
239 dyzzx01
= LLVMBuildShuffleVector(b
, dxyz01
, dxyz01
, LLVMConstVector(shuffles
, 4), "");
241 dyzzx01_dzxyz20
= LLVMBuildFMul(b
, dzxyz20
, dyzzx01
, "dyzzx01_dzxyz20");
244 shuffles
[1] = threei
;
245 shuffles
[2] = LLVMGetUndef(shuf_type
);
246 shuffles
[3] = LLVMGetUndef(shuf_type
);
247 dzx01_dyz20
= LLVMBuildShuffleVector(b
, dyzzx01_dzxyz20
, dyzzx01_dzxyz20
,
248 LLVMConstVector(shuffles
, 4), "");
250 res12
= LLVMBuildFSub(b
, dyzzx01_dzxyz20
, dzx01_dyz20
, "res12");
252 /* dzdx = fabsf(res1 * inv_det), dydx = fabsf(res2 * inv_det)*/
253 dzdxdzdy
= LLVMBuildFMul(b
, res12
, inv_det
, "dzdxdzdy");
254 dzdxdzdy
= lp_build_abs(bld
, dzdxdzdy
);
256 dzdx
= LLVMBuildExtractElement(b
, dzdxdzdy
, zeroi
, "");
257 dzdy
= LLVMBuildExtractElement(b
, dzdxdzdy
, onei
, "");
259 /* mult = MAX2(dzdx, dzdy) * pgon_offset_scale */
260 max
= LLVMBuildFCmp(b
, LLVMRealUGT
, dzdx
, dzdy
, "");
261 max_value
= LLVMBuildSelect(b
, max
, dzdx
, dzdy
, "max");
263 mult
= LLVMBuildFMul(b
, max_value
,
264 lp_build_const_float(gallivm
, key
->pgon_offset_scale
), "");
266 lp_build_context_init(&flt_scalar_bld
, gallivm
, lp_type_float_vec(32, 32));
268 if (key
->floating_point_depth
) {
270 * bias = pgon_offset_units * 2^(exponent(max(z0, z1, z2)) - mantissa_bits) +
271 * MAX2(dzdx, dzdy) * pgon_offset_scale
273 * NOTE: Assumes IEEE float32.
275 LLVMValueRef c23_shifted
, exp_mask
, bias
, exp
;
276 LLVMValueRef maxz_value
, maxz0z1_value
;
278 lp_build_context_init(&int_scalar_bld
, gallivm
, lp_type_int_vec(32, 32));
280 c23_shifted
= lp_build_const_int32(gallivm
, 23 << 23);
281 exp_mask
= lp_build_const_int32(gallivm
, 0xff << 23);
283 maxz0z1_value
= lp_build_max(&flt_scalar_bld
,
284 LLVMBuildExtractElement(b
, attribv
[0], twoi
, ""),
285 LLVMBuildExtractElement(b
, attribv
[1], twoi
, ""));
287 maxz_value
= lp_build_max(&flt_scalar_bld
,
288 LLVMBuildExtractElement(b
, attribv
[2], twoi
, ""),
291 exp
= LLVMBuildBitCast(b
, maxz_value
, int_scalar_bld
.vec_type
, "");
292 exp
= lp_build_and(&int_scalar_bld
, exp
, exp_mask
);
293 exp
= lp_build_sub(&int_scalar_bld
, exp
, c23_shifted
);
294 /* Clamping to zero means mrd will be zero for very small numbers,
295 * but specs do not indicate this should be prevented by clamping
296 * mrd to smallest normal number instead. */
297 exp
= lp_build_max(&int_scalar_bld
, exp
, int_scalar_bld
.zero
);
298 exp
= LLVMBuildBitCast(b
, exp
, flt_scalar_bld
.vec_type
, "");
300 bias
= LLVMBuildFMul(b
, exp
,
301 lp_build_const_float(gallivm
, key
->pgon_offset_units
),
304 zoffset
= LLVMBuildFAdd(b
, bias
, mult
, "zoffset");
307 * bias = pgon_offset_units + MAX2(dzdx, dzdy) * pgon_offset_scale
309 zoffset
= LLVMBuildFAdd(b
,
310 lp_build_const_float(gallivm
, key
->pgon_offset_units
),
314 if (key
->pgon_offset_clamp
> 0) {
315 zoffset
= lp_build_min(&flt_scalar_bld
,
316 lp_build_const_float(gallivm
, key
->pgon_offset_clamp
),
319 else if (key
->pgon_offset_clamp
< 0) {
320 zoffset
= lp_build_max(&flt_scalar_bld
,
321 lp_build_const_float(gallivm
, key
->pgon_offset_clamp
),
327 shuffles
[1] = lp_build_const_int32(gallivm
, 6);
328 shuffles
[2] = LLVMGetUndef(shuf_type
);
329 shuffles
[3] = LLVMGetUndef(shuf_type
);
330 z0z1
= LLVMBuildShuffleVector(b
, attribv
[0], attribv
[1], LLVMConstVector(shuffles
, 4), "");
333 shuffles
[2] = lp_build_const_int32(gallivm
, 6);
334 shuffles
[3] = LLVMGetUndef(shuf_type
);
335 z0z1z2
= LLVMBuildShuffleVector(b
, z0z1
, attribv
[2], LLVMConstVector(shuffles
, 4), "");
336 zoffset
= lp_build_broadcast_scalar(bld
, zoffset
);
338 /* clamp and do offset */
340 * FIXME I suspect the clamp (is that even right to always clamp to fixed
341 * 0.0/1.0?) should really be per fragment?
343 z0z1z2
= lp_build_clamp(bld
, LLVMBuildFAdd(b
, z0z1z2
, zoffset
, ""), bld
->zero
, bld
->one
);
345 /* insert into args->a0.z, a1.z, a2.z:
347 z0_new
= LLVMBuildExtractElement(b
, z0z1z2
, zeroi
, "");
348 z1_new
= LLVMBuildExtractElement(b
, z0z1z2
, onei
, "");
349 z2_new
= LLVMBuildExtractElement(b
, z0z1z2
, twoi
, "");
350 attribv
[0] = LLVMBuildInsertElement(b
, attribv
[0], z0_new
, twoi
, "");
351 attribv
[1] = LLVMBuildInsertElement(b
, attribv
[1], z1_new
, twoi
, "");
352 attribv
[2] = LLVMBuildInsertElement(b
, attribv
[2], z2_new
, twoi
, "");
356 load_attribute(struct gallivm_state
*gallivm
,
357 struct lp_setup_args
*args
,
358 const struct lp_setup_variant_key
*key
,
360 LLVMValueRef attribv
[3])
362 LLVMBuilderRef b
= gallivm
->builder
;
363 LLVMValueRef idx
= lp_build_const_int32(gallivm
, vert_attr
);
365 /* Load the vertex data
367 attribv
[0] = LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v0
, &idx
, 1, ""), "v0a");
368 attribv
[1] = LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v1
, &idx
, 1, ""), "v1a");
369 attribv
[2] = LLVMBuildLoad(b
, LLVMBuildGEP(b
, args
->v2
, &idx
, 1, ""), "v2a");
372 /* Potentially modify it according to twoside, etc:
375 if (vert_attr
== key
->color_slot
&& key
->bcolor_slot
>= 0)
376 lp_twoside(gallivm
, args
, key
, key
->bcolor_slot
, attribv
);
377 else if (vert_attr
== key
->spec_slot
&& key
->bspec_slot
>= 0)
378 lp_twoside(gallivm
, args
, key
, key
->bspec_slot
, attribv
);
383 * FIXME: interpolation is always done wrt fb origin (0/0).
384 * However, if some (small) tri is far away from the origin and gradients
385 * are large, this can lead to HUGE errors, since the a0 value calculated
386 * here can get very large (with the actual values inside the triangle way
387 * smaller), leading to complete loss of accuracy. This could be prevented
388 * by using some point inside (or at corner) of the tri as interpolation
389 * origin, or just use barycentric interpolation (which GL suggests and is
390 * what real hw does - you can get the barycentric coordinates from the
391 * edge functions in rasterization in principle (though we skip these
392 * sometimes completely in case of tris covering a block fully,
393 * which obviously wouldn't work)).
396 emit_coef4( struct gallivm_state
*gallivm
,
397 struct lp_setup_args
*args
,
403 LLVMBuilderRef b
= gallivm
->builder
;
405 LLVMValueRef dy20_ooa
= args
->dy20_ooa
;
406 LLVMValueRef dy01_ooa
= args
->dy01_ooa
;
407 LLVMValueRef dx20_ooa
= args
->dx20_ooa
;
408 LLVMValueRef dx01_ooa
= args
->dx01_ooa
;
409 LLVMValueRef x0_center
= args
->x0_center
;
410 LLVMValueRef y0_center
= args
->y0_center
;
411 LLVMValueRef da01
= LLVMBuildFSub(b
, a0
, a1
, "da01");
412 LLVMValueRef da20
= LLVMBuildFSub(b
, a2
, a0
, "da20");
414 /* Calculate dadx (vec4f)
416 LLVMValueRef da01_dy20_ooa
= LLVMBuildFMul(b
, da01
, dy20_ooa
, "da01_dy20_ooa");
417 LLVMValueRef da20_dy01_ooa
= LLVMBuildFMul(b
, da20
, dy01_ooa
, "da20_dy01_ooa");
418 LLVMValueRef dadx
= LLVMBuildFSub(b
, da01_dy20_ooa
, da20_dy01_ooa
, "dadx");
420 /* Calculate dady (vec4f)
422 LLVMValueRef da01_dx20_ooa
= LLVMBuildFMul(b
, da01
, dx20_ooa
, "da01_dx20_ooa");
423 LLVMValueRef da20_dx01_ooa
= LLVMBuildFMul(b
, da20
, dx01_ooa
, "da20_dx01_ooa");
424 LLVMValueRef dady
= LLVMBuildFSub(b
, da20_dx01_ooa
, da01_dx20_ooa
, "dady");
426 /* Calculate a0 - the attribute value at the origin
428 LLVMValueRef dadx_x0
= LLVMBuildFMul(b
, dadx
, x0_center
, "dadx_x0");
429 LLVMValueRef dady_y0
= LLVMBuildFMul(b
, dady
, y0_center
, "dady_y0");
430 LLVMValueRef attr_v0
= LLVMBuildFAdd(b
, dadx_x0
, dady_y0
, "attr_v0");
431 attr_0
= LLVMBuildFSub(b
, a0
, attr_v0
, "attr_0");
433 store_coef(gallivm
, args
, slot
, attr_0
, dadx
, dady
);
438 emit_linear_coef( struct gallivm_state
*gallivm
,
439 struct lp_setup_args
*args
,
441 LLVMValueRef attribv
[3])
443 /* nothing to do anymore */
453 * Compute a0, dadx and dady for a perspective-corrected interpolant,
455 * We basically multiply the vertex value by 1/w before computing
456 * the plane coefficients (a0, dadx, dady).
457 * Later, when we compute the value at a particular fragment position we'll
458 * divide the interpolated value by the interpolated W at that fragment.
461 apply_perspective_corr( struct gallivm_state
*gallivm
,
462 struct lp_setup_args
*args
,
464 LLVMValueRef attribv
[3])
466 LLVMBuilderRef b
= gallivm
->builder
;
468 /* premultiply by 1/w (v[0][3] is always 1/w):
470 LLVMValueRef v0_oow
= lp_build_broadcast_scalar(&args
->bld
,
471 vert_attrib(gallivm
, args
->v0
, 0, 3, "v0_oow"));
472 LLVMValueRef v1_oow
= lp_build_broadcast_scalar(&args
->bld
,
473 vert_attrib(gallivm
, args
->v1
, 0, 3, "v1_oow"));
474 LLVMValueRef v2_oow
= lp_build_broadcast_scalar(&args
->bld
,
475 vert_attrib(gallivm
, args
->v2
, 0, 3, "v2_oow"));
477 attribv
[0] = LLVMBuildFMul(b
, attribv
[0], v0_oow
, "v0_oow_v0a");
478 attribv
[1] = LLVMBuildFMul(b
, attribv
[1], v1_oow
, "v1_oow_v1a");
479 attribv
[2] = LLVMBuildFMul(b
, attribv
[2], v2_oow
, "v2_oow_v2a");
484 * Applys cylindrical wrapping to vertex attributes if enabled.
485 * Input coordinates must be in [0, 1] range, otherwise results are undefined.
487 * @param cyl_wrap TGSI_CYLINDRICAL_WRAP_x flags
490 emit_apply_cyl_wrap(struct gallivm_state
*gallivm
,
491 struct lp_setup_args
*args
,
493 LLVMValueRef attribv
[3])
496 LLVMBuilderRef builder
= gallivm
->builder
;
497 struct lp_type type
= args
->bld
.type
;
498 LLVMTypeRef float_vec_type
= args
->bld
.vec_type
;
499 LLVMValueRef pos_half
;
500 LLVMValueRef neg_half
;
501 LLVMValueRef cyl_mask
;
510 pos_half
= lp_build_const_vec(gallivm
, type
, +0.5f
);
511 neg_half
= lp_build_const_vec(gallivm
, type
, -0.5f
);
512 cyl_mask
= lp_build_const_mask_aos(gallivm
, type
, cyl_wrap
, 4);
514 one
= lp_build_const_vec(gallivm
, type
, 1.0f
);
515 one
= LLVMBuildBitCast(builder
, one
, lp_build_int_vec_type(gallivm
, type
), "");
516 one
= LLVMBuildAnd(builder
, one
, cyl_mask
, "");
519 delta
= LLVMBuildFSub(builder
, attribv
[1], attribv
[0], "");
521 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_GREATER
, delta
, pos_half
);
522 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
523 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
524 attribv
[0] = LLVMBuildFAdd(builder
, attribv
[0], offset
, "");
526 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_LESS
, delta
, neg_half
);
527 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
528 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
529 attribv
[1] = LLVMBuildFAdd(builder
, attribv
[1], offset
, "");
532 delta
= LLVMBuildFSub(builder
, attribv
[2], attribv
[1], "");
534 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_GREATER
, delta
, pos_half
);
535 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
536 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
537 attribv
[1] = LLVMBuildFAdd(builder
, attribv
[1], offset
, "");
539 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_LESS
, delta
, neg_half
);
540 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
541 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
542 attribv
[2] = LLVMBuildFAdd(builder
, attribv
[2], offset
, "");
545 delta
= LLVMBuildFSub(builder
, attribv
[0], attribv
[2], "");
547 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_GREATER
, delta
, pos_half
);
548 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
549 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
550 attribv
[2] = LLVMBuildFAdd(builder
, attribv
[2], offset
, "");
552 offset
= lp_build_compare(gallivm
, type
, PIPE_FUNC_LESS
, delta
, neg_half
);
553 offset
= LLVMBuildAnd(builder
, offset
, one
, "");
554 offset
= LLVMBuildBitCast(builder
, offset
, float_vec_type
, "");
555 attribv
[0] = LLVMBuildFAdd(builder
, attribv
[0], offset
, "");
560 * Compute the inputs-> dadx, dady, a0 values.
563 emit_tri_coef( struct gallivm_state
*gallivm
,
564 const struct lp_setup_variant_key
*key
,
565 struct lp_setup_args
*args
)
569 LLVMValueRef attribs
[3];
571 /* setup interpolation for all the remaining attributes:
573 for (slot
= 0; slot
< key
->num_inputs
; slot
++) {
574 switch (key
->inputs
[slot
].interp
) {
575 case LP_INTERP_CONSTANT
:
576 load_attribute(gallivm
, args
, key
, key
->inputs
[slot
].src_index
, attribs
);
577 if (key
->flatshade_first
) {
578 emit_constant_coef4(gallivm
, args
, slot
+1, attribs
[0]);
581 emit_constant_coef4(gallivm
, args
, slot
+1, attribs
[2]);
585 case LP_INTERP_LINEAR
:
586 load_attribute(gallivm
, args
, key
, key
->inputs
[slot
].src_index
, attribs
);
587 emit_apply_cyl_wrap(gallivm
, args
, key
->inputs
[slot
].cyl_wrap
, attribs
);
588 emit_linear_coef(gallivm
, args
, slot
+1, attribs
);
591 case LP_INTERP_PERSPECTIVE
:
592 load_attribute(gallivm
, args
, key
, key
->inputs
[slot
].src_index
, attribs
);
593 emit_apply_cyl_wrap(gallivm
, args
, key
->inputs
[slot
].cyl_wrap
, attribs
);
594 apply_perspective_corr(gallivm
, args
, slot
+1, attribs
);
595 emit_linear_coef(gallivm
, args
, slot
+1, attribs
);
598 case LP_INTERP_POSITION
:
600 * The generated pixel interpolators will pick up the coeffs from
605 case LP_INTERP_FACING
:
606 emit_facing_coef(gallivm
, args
, slot
+1);
616 /* XXX: generic code:
619 set_noalias(LLVMBuilderRef builder
,
620 LLVMValueRef function
,
621 const LLVMTypeRef
*arg_types
,
625 for(i
= 0; i
< nr_args
; ++i
)
626 if(LLVMGetTypeKind(arg_types
[i
]) == LLVMPointerTypeKind
)
627 lp_add_function_attr(function
, i
+ 1, LP_FUNC_ATTR_NOALIAS
);
631 init_args(struct gallivm_state
*gallivm
,
632 const struct lp_setup_variant_key
*key
,
633 struct lp_setup_args
*args
)
635 LLVMBuilderRef b
= gallivm
->builder
;
636 LLVMTypeRef shuf_type
= LLVMInt32TypeInContext(gallivm
->context
);
637 LLVMValueRef onef
= lp_build_const_float(gallivm
, 1.0);
638 LLVMValueRef onei
= lp_build_const_int32(gallivm
, 1);
639 LLVMValueRef zeroi
= lp_build_const_int32(gallivm
, 0);
640 LLVMValueRef pixel_center
, xy0_center
, dxy01
, dxy20
, dyx20
;
641 LLVMValueRef e
, f
, ef
, ooa
;
642 LLVMValueRef shuffles
[4], shuf10
;
643 LLVMValueRef attr_pos
[3];
644 struct lp_type typef4
= lp_type_float_vec(32, 128);
645 struct lp_build_context bld
;
647 lp_build_context_init(&bld
, gallivm
, typef4
);
650 /* The internal position input is in slot zero:
652 load_attribute(gallivm
, args
, key
, 0, attr_pos
);
654 pixel_center
= lp_build_const_vec(gallivm
, typef4
,
655 key
->pixel_center_half
? 0.5 : 0.0);
658 * xy are first two elems in v0a/v1a/v2a but just use vec4 arit
659 * also offset_tri uses actually xyz in them
661 xy0_center
= LLVMBuildFSub(b
, attr_pos
[0], pixel_center
, "xy0_center" );
663 dxy01
= LLVMBuildFSub(b
, attr_pos
[0], attr_pos
[1], "dxy01");
664 dxy20
= LLVMBuildFSub(b
, attr_pos
[2], attr_pos
[0], "dxy20");
668 shuffles
[2] = LLVMGetUndef(shuf_type
);
669 shuffles
[3] = LLVMGetUndef(shuf_type
);
670 shuf10
= LLVMConstVector(shuffles
, 4);
672 dyx20
= LLVMBuildShuffleVector(b
, dxy20
, dxy20
, shuf10
, "");
674 ef
= LLVMBuildFMul(b
, dxy01
, dyx20
, "ef");
675 e
= LLVMBuildExtractElement(b
, ef
, zeroi
, "");
676 f
= LLVMBuildExtractElement(b
, ef
, onei
, "");
678 ooa
= LLVMBuildFDiv(b
, onef
, LLVMBuildFSub(b
, e
, f
, ""), "ooa");
680 ooa
= lp_build_broadcast_scalar(&bld
, ooa
);
682 /* tri offset calc shares a lot of arithmetic, do it here */
683 if (key
->pgon_offset_scale
!= 0.0f
|| key
->pgon_offset_units
!= 0.0f
) {
684 lp_do_offset_tri(gallivm
, args
, key
, ooa
, dxy01
, dxy20
, attr_pos
);
687 dxy20
= LLVMBuildFMul(b
, dxy20
, ooa
, "");
688 dxy01
= LLVMBuildFMul(b
, dxy01
, ooa
, "");
690 args
->dy20_ooa
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, dxy20
, onei
);
691 args
->dy01_ooa
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, dxy01
, onei
);
693 args
->dx20_ooa
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, dxy20
, zeroi
);
694 args
->dx01_ooa
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, dxy01
, zeroi
);
696 args
->x0_center
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, xy0_center
, zeroi
);
697 args
->y0_center
= lp_build_extract_broadcast(gallivm
, typef4
, typef4
, xy0_center
, onei
);
699 emit_linear_coef(gallivm
, args
, 0, attr_pos
);
703 * Generate the runtime callable function for the coefficient calculation.
706 static struct lp_setup_variant
*
707 generate_setup_variant(struct lp_setup_variant_key
*key
,
708 struct llvmpipe_context
*lp
)
710 struct lp_setup_variant
*variant
= NULL
;
711 struct gallivm_state
*gallivm
;
712 struct lp_setup_args args
;
714 LLVMTypeRef vec4f_type
;
715 LLVMTypeRef func_type
;
716 LLVMTypeRef arg_types
[7];
717 LLVMBasicBlockRef block
;
718 LLVMBuilderRef builder
;
724 variant
= CALLOC_STRUCT(lp_setup_variant
);
728 variant
->no
= setup_no
++;
730 util_snprintf(func_name
, sizeof(func_name
), "setup_variant_%u",
733 variant
->gallivm
= gallivm
= gallivm_create(func_name
, lp
->context
);
734 if (!variant
->gallivm
) {
738 builder
= gallivm
->builder
;
740 if (LP_DEBUG
& DEBUG_COUNTERS
) {
744 memcpy(&variant
->key
, key
, key
->size
);
745 variant
->list_item_global
.base
= variant
;
747 /* Currently always deal with full 4-wide vertex attributes from
751 vec4f_type
= LLVMVectorType(LLVMFloatTypeInContext(gallivm
->context
), 4);
753 arg_types
[0] = LLVMPointerType(vec4f_type
, 0); /* v0 */
754 arg_types
[1] = LLVMPointerType(vec4f_type
, 0); /* v1 */
755 arg_types
[2] = LLVMPointerType(vec4f_type
, 0); /* v2 */
756 arg_types
[3] = LLVMInt32TypeInContext(gallivm
->context
); /* facing */
757 arg_types
[4] = LLVMPointerType(vec4f_type
, 0); /* a0, aligned */
758 arg_types
[5] = LLVMPointerType(vec4f_type
, 0); /* dadx, aligned */
759 arg_types
[6] = LLVMPointerType(vec4f_type
, 0); /* dady, aligned */
761 func_type
= LLVMFunctionType(LLVMVoidTypeInContext(gallivm
->context
),
762 arg_types
, ARRAY_SIZE(arg_types
), 0);
764 variant
->function
= LLVMAddFunction(gallivm
->module
, func_name
, func_type
);
765 if (!variant
->function
)
768 LLVMSetFunctionCallConv(variant
->function
, LLVMCCallConv
);
770 args
.v0
= LLVMGetParam(variant
->function
, 0);
771 args
.v1
= LLVMGetParam(variant
->function
, 1);
772 args
.v2
= LLVMGetParam(variant
->function
, 2);
773 args
.facing
= LLVMGetParam(variant
->function
, 3);
774 args
.a0
= LLVMGetParam(variant
->function
, 4);
775 args
.dadx
= LLVMGetParam(variant
->function
, 5);
776 args
.dady
= LLVMGetParam(variant
->function
, 6);
778 lp_build_name(args
.v0
, "in_v0");
779 lp_build_name(args
.v1
, "in_v1");
780 lp_build_name(args
.v2
, "in_v2");
781 lp_build_name(args
.facing
, "in_facing");
782 lp_build_name(args
.a0
, "out_a0");
783 lp_build_name(args
.dadx
, "out_dadx");
784 lp_build_name(args
.dady
, "out_dady");
789 block
= LLVMAppendBasicBlockInContext(gallivm
->context
,
790 variant
->function
, "entry");
791 LLVMPositionBuilderAtEnd(builder
, block
);
793 set_noalias(builder
, variant
->function
, arg_types
, ARRAY_SIZE(arg_types
));
794 init_args(gallivm
, &variant
->key
, &args
);
795 emit_tri_coef(gallivm
, &variant
->key
, &args
);
797 LLVMBuildRetVoid(builder
);
799 gallivm_verify_function(gallivm
, variant
->function
);
801 gallivm_compile_module(gallivm
);
803 variant
->jit_function
= (lp_jit_setup_triangle
)
804 gallivm_jit_function(gallivm
, variant
->function
);
805 if (!variant
->jit_function
)
808 gallivm_free_ir(variant
->gallivm
);
811 * Update timing information:
813 if (LP_DEBUG
& DEBUG_COUNTERS
) {
815 LP_COUNT_ADD(llvm_compile_time
, t1
- t0
);
816 LP_COUNT_ADD(nr_llvm_compiles
, 1);
823 if (variant
->gallivm
) {
824 gallivm_destroy(variant
->gallivm
);
835 lp_make_setup_variant_key(struct llvmpipe_context
*lp
,
836 struct lp_setup_variant_key
*key
)
838 struct lp_fragment_shader
*fs
= lp
->fs
;
841 assert(sizeof key
->inputs
[0] == sizeof(uint
));
843 key
->num_inputs
= fs
->info
.base
.num_inputs
;
844 key
->flatshade_first
= lp
->rasterizer
->flatshade_first
;
845 key
->pixel_center_half
= lp
->rasterizer
->half_pixel_center
;
846 key
->twoside
= lp
->rasterizer
->light_twoside
;
847 key
->size
= Offset(struct lp_setup_variant_key
,
848 inputs
[key
->num_inputs
]);
850 key
->color_slot
= lp
->color_slot
[0];
851 key
->bcolor_slot
= lp
->bcolor_slot
[0];
852 key
->spec_slot
= lp
->color_slot
[1];
853 key
->bspec_slot
= lp
->bcolor_slot
[1];
856 * If depth is floating point, depth bias is calculated with respect
857 * to the primitive's maximum Z value. Retain the original depth bias
858 * value until that stage.
860 key
->floating_point_depth
= lp
->floating_point_depth
;
862 if (key
->floating_point_depth
) {
863 key
->pgon_offset_units
= (float) lp
->rasterizer
->offset_units
;
865 key
->pgon_offset_units
=
866 (float) (lp
->rasterizer
->offset_units
* lp
->mrd
);
869 key
->pgon_offset_scale
= lp
->rasterizer
->offset_scale
;
870 key
->pgon_offset_clamp
= lp
->rasterizer
->offset_clamp
;
872 memcpy(key
->inputs
, fs
->inputs
, key
->num_inputs
* sizeof key
->inputs
[0]);
873 for (i
= 0; i
< key
->num_inputs
; i
++) {
874 if (key
->inputs
[i
].interp
== LP_INTERP_COLOR
) {
875 if (lp
->rasterizer
->flatshade
)
876 key
->inputs
[i
].interp
= LP_INTERP_CONSTANT
;
878 key
->inputs
[i
].interp
= LP_INTERP_PERSPECTIVE
;
886 remove_setup_variant(struct llvmpipe_context
*lp
,
887 struct lp_setup_variant
*variant
)
889 if (gallivm_debug
& GALLIVM_DEBUG_IR
) {
890 debug_printf("llvmpipe: del setup_variant #%u total %u\n",
891 variant
->no
, lp
->nr_setup_variants
);
894 if (variant
->gallivm
) {
895 gallivm_destroy(variant
->gallivm
);
898 remove_from_list(&variant
->list_item_global
);
899 lp
->nr_setup_variants
--;
905 /* When the number of setup variants exceeds a threshold, cull a
906 * fraction (currently a quarter) of them.
909 cull_setup_variants(struct llvmpipe_context
*lp
)
911 struct pipe_context
*pipe
= &lp
->pipe
;
915 * XXX: we need to flush the context until we have some sort of reference
916 * counting in fragment shaders as they may still be binned
917 * Flushing alone might not be sufficient we need to wait on it too.
919 llvmpipe_finish(pipe
, __FUNCTION__
);
921 for (i
= 0; i
< LP_MAX_SETUP_VARIANTS
/ 4; i
++) {
922 struct lp_setup_variant_list_item
*item
;
923 if (is_empty_list(&lp
->setup_variants_list
)) {
926 item
= last_elem(&lp
->setup_variants_list
);
929 remove_setup_variant(lp
, item
->base
);
935 * Update fragment/vertex shader linkage state. This is called just
936 * prior to drawing something when some fragment-related state has
940 llvmpipe_update_setup(struct llvmpipe_context
*lp
)
942 struct lp_setup_variant_key
*key
= &lp
->setup_variant
.key
;
943 struct lp_setup_variant
*variant
= NULL
;
944 struct lp_setup_variant_list_item
*li
;
946 lp_make_setup_variant_key(lp
, key
);
948 foreach(li
, &lp
->setup_variants_list
) {
949 if(li
->base
->key
.size
== key
->size
&&
950 memcmp(&li
->base
->key
, key
, key
->size
) == 0) {
957 move_to_head(&lp
->setup_variants_list
, &variant
->list_item_global
);
960 if (lp
->nr_setup_variants
>= LP_MAX_SETUP_VARIANTS
) {
961 cull_setup_variants(lp
);
964 variant
= generate_setup_variant(key
, lp
);
966 insert_at_head(&lp
->setup_variants_list
, &variant
->list_item_global
);
967 lp
->nr_setup_variants
++;
971 lp_setup_set_setup_variant(lp
->setup
, variant
);
975 lp_delete_setup_variants(struct llvmpipe_context
*lp
)
977 struct lp_setup_variant_list_item
*li
;
978 li
= first_elem(&lp
->setup_variants_list
);
979 while(!at_end(&lp
->setup_variants_list
, li
)) {
980 struct lp_setup_variant_list_item
*next
= next_elem(li
);
981 remove_setup_variant(lp
, li
->base
);
987 lp_dump_setup_coef(const struct lp_setup_variant_key
*key
,
988 const float (*sa0
)[4],
989 const float (*sdadx
)[4],
990 const float (*sdady
)[4])
994 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
995 float a0
= sa0
[0][i
];
996 float dadx
= sdadx
[0][i
];
997 float dady
= sdady
[0][i
];
999 debug_printf("POS.%c: a0 = %f, dadx = %f, dady = %f\n",
1000 "xyzw"[i
], a0
, dadx
, dady
);
1003 for (slot
= 0; slot
< key
->num_inputs
; slot
++) {
1004 unsigned usage_mask
= key
->inputs
[slot
].usage_mask
;
1005 for (i
= 0; i
< TGSI_NUM_CHANNELS
; i
++) {
1006 if (usage_mask
& (1 << i
)) {
1007 float a0
= sa0
[1 + slot
][i
];
1008 float dadx
= sdadx
[1 + slot
][i
];
1009 float dady
= sdady
[1 + slot
][i
];
1011 debug_printf("IN[%u].%c: a0 = %f, dadx = %f, dady = %f\n",
1012 slot
, "xyzw"[i
], a0
, dadx
, dady
);