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
26 static inline void
blorp_nir_init_shader(nir_builder * b,void * mem_ctx,gl_shader_stage stage,const char * name)27 blorp_nir_init_shader(nir_builder *b,
28 void *mem_ctx,
29 gl_shader_stage stage,
30 const char *name)
31 {
32 *b = nir_builder_init_simple_shader(stage, NULL, "%s", name ? name : "");
33 ralloc_steal(mem_ctx, b->shader);
34 if (stage == MESA_SHADER_FRAGMENT)
35 b->shader->info.fs.origin_upper_left = true;
36 }
37
38 static inline nir_ssa_def *
blorp_nir_txf_ms_mcs(nir_builder * b,nir_ssa_def * xy_pos,nir_ssa_def * layer)39 blorp_nir_txf_ms_mcs(nir_builder *b, nir_ssa_def *xy_pos, nir_ssa_def *layer)
40 {
41 nir_tex_instr *tex = nir_tex_instr_create(b->shader, 1);
42 tex->op = nir_texop_txf_ms_mcs_intel;
43 tex->sampler_dim = GLSL_SAMPLER_DIM_MS;
44 tex->dest_type = nir_type_int32;
45
46 nir_ssa_def *coord;
47 if (layer) {
48 tex->is_array = true;
49 tex->coord_components = 3;
50 coord = nir_vec3(b, nir_channel(b, xy_pos, 0),
51 nir_channel(b, xy_pos, 1),
52 layer);
53 } else {
54 tex->is_array = false;
55 tex->coord_components = 2;
56 coord = nir_channels(b, xy_pos, 0x3);
57 }
58 tex->src[0].src_type = nir_tex_src_coord;
59 tex->src[0].src = nir_src_for_ssa(coord);
60
61 /* Blorp only has one texture and it's bound at unit 0 */
62 tex->texture_index = 0;
63 tex->sampler_index = 0;
64
65 nir_ssa_dest_init(&tex->instr, &tex->dest, 4, 32, NULL);
66 nir_builder_instr_insert(b, &tex->instr);
67
68 return &tex->dest.ssa;
69 }
70
71 static inline nir_ssa_def *
blorp_nir_mcs_is_clear_color(nir_builder * b,nir_ssa_def * mcs,uint32_t samples)72 blorp_nir_mcs_is_clear_color(nir_builder *b,
73 nir_ssa_def *mcs,
74 uint32_t samples)
75 {
76 switch (samples) {
77 case 2:
78 /* Empirical evidence suggests that the value returned from the
79 * sampler is not always 0x3 for clear color so we need to mask it.
80 */
81 return nir_ieq_imm(b, nir_iand(b, nir_channel(b, mcs, 0),
82 nir_imm_int(b, 0x3)),
83 0x3);
84
85 case 4:
86 return nir_ieq_imm(b, nir_channel(b, mcs, 0), 0xff);
87
88 case 8:
89 return nir_ieq_imm(b, nir_channel(b, mcs, 0), ~0);
90
91 case 16:
92 /* For 16x MSAA, the MCS is actually an ivec2 */
93 return nir_iand(b, nir_ieq_imm(b, nir_channel(b, mcs, 0), ~0),
94 nir_ieq_imm(b, nir_channel(b, mcs, 1), ~0));
95
96 default:
97 unreachable("Invalid sample count");
98 }
99 }
100
101 static inline nir_ssa_def *
blorp_check_in_bounds(nir_builder * b,nir_ssa_def * bounds_rect,nir_ssa_def * pos)102 blorp_check_in_bounds(nir_builder *b,
103 nir_ssa_def *bounds_rect,
104 nir_ssa_def *pos)
105 {
106 nir_ssa_def *x0 = nir_channel(b, bounds_rect, 0);
107 nir_ssa_def *x1 = nir_channel(b, bounds_rect, 1);
108 nir_ssa_def *y0 = nir_channel(b, bounds_rect, 2);
109 nir_ssa_def *y1 = nir_channel(b, bounds_rect, 3);
110
111 nir_ssa_def *c0 = nir_uge(b, nir_channel(b, pos, 0), x0);
112 nir_ssa_def *c1 = nir_ult(b, nir_channel(b, pos, 0), x1);
113 nir_ssa_def *c2 = nir_uge(b, nir_channel(b, pos, 1), y0);
114 nir_ssa_def *c3 = nir_ult(b, nir_channel(b, pos, 1), y1);
115
116 nir_ssa_def *in_bounds =
117 nir_iand(b, nir_iand(b, c0, c1), nir_iand(b, c2, c3));
118
119 return in_bounds;
120 }
121