1 /*
2 * Copyright © 2017 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 */
23
24 #include "compiler/nir/nir_builder.h"
25 #include "blorp_priv.h"
26
27 static inline void
blorp_nir_init_shader(nir_builder * b,struct blorp_context * blorp,void * mem_ctx,gl_shader_stage stage,const char * name)28 blorp_nir_init_shader(nir_builder *b,
29 struct blorp_context *blorp,
30 void *mem_ctx,
31 gl_shader_stage stage,
32 const char *name)
33 {
34 const nir_shader_compiler_options *nir_options =
35 blorp->compiler->nir_options(blorp, stage);
36
37 *b = nir_builder_init_simple_shader(stage, nir_options,
38 "%s", name ? name : "");
39 ralloc_steal(mem_ctx, b->shader);
40 if (stage == MESA_SHADER_FRAGMENT)
41 b->shader->info.fs.origin_upper_left = true;
42 }
43
44 static inline nir_def *
blorp_nir_txf_ms_mcs(nir_builder * b,nir_def * xy_pos,nir_def * layer)45 blorp_nir_txf_ms_mcs(nir_builder *b, nir_def *xy_pos, nir_def *layer)
46 {
47 nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1);
48 tex->op = nir_texop_txf_ms_mcs_intel;
49 tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
50 tex->dest_type = nir_type_int32;
51
52 nir_def *coord;
53 if (layer) {
54 tex->is_array = true;
55 tex->coord_components = 3;
56 coord = nir_vec3(b, nir_channel(b, xy_pos, 0),
57 nir_channel(b, xy_pos, 1),
58 layer);
59 } else {
60 tex->is_array = false;
61 tex->coord_components = 2;
62 coord = nir_trim_vector(b, xy_pos, 2);
63 }
64 tex->src[0] = nir_tex_src_for_ssa(nir_tex_src_coord, coord);
65
66 /* Blorp only has one texture and it's bound at unit 0 */
67 tex->texture_index = 0;
68 tex->sampler_index = 0;
69
70 nir_def_init(&tex->instr, &tex->def, 4, 32);
71 nir_builder_instr_insert(b, &tex->instr);
72
73 return &tex->def;
74 }
75
76 static inline nir_def *
blorp_nir_mcs_is_clear_color(nir_builder * b,nir_def * mcs,uint32_t samples)77 blorp_nir_mcs_is_clear_color(nir_builder *b,
78 nir_def *mcs,
79 uint32_t samples)
80 {
81 switch (samples) {
82 case 2:
83 /* Empirical evidence suggests that the value returned from the
84 * sampler is not always 0x3 for clear color so we need to mask it.
85 */
86 return nir_ieq_imm(b, nir_iand(b, nir_channel(b, mcs, 0),
87 nir_imm_int(b, 0x3)),
88 0x3);
89
90 case 4:
91 return nir_ieq_imm(b, nir_channel(b, mcs, 0), 0xff);
92
93 case 8:
94 return nir_ieq_imm(b, nir_channel(b, mcs, 0), ~0);
95
96 case 16:
97 /* For 16x MSAA, the MCS is actually an ivec2 */
98 return nir_iand(b, nir_ieq_imm(b, nir_channel(b, mcs, 0), ~0),
99 nir_ieq_imm(b, nir_channel(b, mcs, 1), ~0));
100
101 default:
102 unreachable("Invalid sample count");
103 }
104 }
105
106 static inline nir_def *
blorp_check_in_bounds(nir_builder * b,nir_def * bounds_rect,nir_def * pos)107 blorp_check_in_bounds(nir_builder *b,
108 nir_def *bounds_rect,
109 nir_def *pos)
110 {
111 nir_def *x0 = nir_channel(b, bounds_rect, 0);
112 nir_def *x1 = nir_channel(b, bounds_rect, 1);
113 nir_def *y0 = nir_channel(b, bounds_rect, 2);
114 nir_def *y1 = nir_channel(b, bounds_rect, 3);
115
116 nir_def *c0 = nir_uge(b, nir_channel(b, pos, 0), x0);
117 nir_def *c1 = nir_ult(b, nir_channel(b, pos, 0), x1);
118 nir_def *c2 = nir_uge(b, nir_channel(b, pos, 1), y0);
119 nir_def *c3 = nir_ult(b, nir_channel(b, pos, 1), y1);
120
121 nir_def *in_bounds =
122 nir_iand(b, nir_iand(b, c0, c1), nir_iand(b, c2, c3));
123
124 return in_bounds;
125 }
126