1/*
2 * Copyright (C) 2017-2018 Rob Clark <robclark@freedesktop.org>
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 *
23 * Authors:
24 *    Rob Clark <robclark@freedesktop.org>
25 */
26
27#include "ir3_image.h"
28
29/*
30 * SSBO/Image to/from IBO/tex hw mapping table:
31 */
32
33void
34ir3_ibo_mapping_init(struct ir3_ibo_mapping *mapping, unsigned num_textures)
35{
36   memset(mapping, IBO_INVALID, sizeof(*mapping));
37   mapping->num_tex = 0;
38   mapping->tex_base = num_textures;
39}
40
41struct ir3_instruction *
42ir3_ssbo_to_ibo(struct ir3_context *ctx, nir_src src)
43{
44   if (ir3_bindless_resource(src)) {
45      ctx->so->bindless_ibo = true;
46      return ir3_get_src(ctx, &src)[0];
47   } else {
48      /* can this be non-const buffer_index?  how do we handle that? */
49      int ssbo_idx = nir_src_as_uint(src);
50      return create_immed(ctx->block, ssbo_idx);
51   }
52}
53
54unsigned
55ir3_ssbo_to_tex(struct ir3_ibo_mapping *mapping, unsigned ssbo)
56{
57   if (mapping->ssbo_to_tex[ssbo] == IBO_INVALID) {
58      unsigned tex = mapping->num_tex++;
59      mapping->ssbo_to_tex[ssbo] = tex;
60      mapping->tex_to_image[tex] = IBO_SSBO | ssbo;
61   }
62   return mapping->ssbo_to_tex[ssbo] + mapping->tex_base;
63}
64
65struct ir3_instruction *
66ir3_image_to_ibo(struct ir3_context *ctx, nir_src src)
67{
68   if (ir3_bindless_resource(src)) {
69      ctx->so->bindless_ibo = true;
70      return ir3_get_src(ctx, &src)[0];
71   } else {
72      /* can this be non-const buffer_index?  how do we handle that? */
73      int image_idx = nir_src_as_uint(src);
74      return create_immed(ctx->block, ctx->s->info.num_ssbos + image_idx);
75   }
76}
77
78unsigned
79ir3_image_to_tex(struct ir3_ibo_mapping *mapping, unsigned image)
80{
81   if (mapping->image_to_tex[image] == IBO_INVALID) {
82      unsigned tex = mapping->num_tex++;
83      mapping->image_to_tex[image] = tex;
84      mapping->tex_to_image[tex] = image;
85   }
86   return mapping->image_to_tex[image] + mapping->tex_base;
87}
88
89/* see tex_info() for equiv logic for texture instructions.. it would be
90 * nice if this could be better unified..
91 */
92unsigned
93ir3_get_image_coords(const nir_intrinsic_instr *instr, unsigned *flagsp)
94{
95   unsigned coords = nir_image_intrinsic_coord_components(instr);
96   unsigned flags = 0;
97
98   if (coords == 3)
99      flags |= IR3_INSTR_3D;
100
101   if (nir_intrinsic_image_array(instr))
102      flags |= IR3_INSTR_A;
103
104   if (flagsp)
105      *flagsp = flags;
106
107   return coords;
108}
109
110type_t
111ir3_get_type_for_image_intrinsic(const nir_intrinsic_instr *instr)
112{
113   const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic];
114   int bit_size = info->has_dest ? nir_dest_bit_size(instr->dest) : 32;
115
116   nir_alu_type type = nir_type_uint;
117   switch (instr->intrinsic) {
118   case nir_intrinsic_image_load:
119   case nir_intrinsic_bindless_image_load:
120      type = nir_alu_type_get_base_type(nir_intrinsic_dest_type(instr));
121      /* SpvOpAtomicLoad doesn't have dest type */
122      if (type == nir_type_invalid)
123         type = nir_type_uint;
124      break;
125
126   case nir_intrinsic_image_store:
127   case nir_intrinsic_bindless_image_store:
128      type = nir_alu_type_get_base_type(nir_intrinsic_src_type(instr));
129      /* SpvOpAtomicStore doesn't have src type */
130      if (type == nir_type_invalid)
131         type = nir_type_uint;
132      break;
133
134   case nir_intrinsic_image_atomic_add:
135   case nir_intrinsic_bindless_image_atomic_add:
136   case nir_intrinsic_image_atomic_umin:
137   case nir_intrinsic_bindless_image_atomic_umin:
138   case nir_intrinsic_image_atomic_umax:
139   case nir_intrinsic_bindless_image_atomic_umax:
140   case nir_intrinsic_image_atomic_and:
141   case nir_intrinsic_bindless_image_atomic_and:
142   case nir_intrinsic_image_atomic_or:
143   case nir_intrinsic_bindless_image_atomic_or:
144   case nir_intrinsic_image_atomic_xor:
145   case nir_intrinsic_bindless_image_atomic_xor:
146   case nir_intrinsic_image_atomic_exchange:
147   case nir_intrinsic_bindless_image_atomic_exchange:
148   case nir_intrinsic_image_atomic_comp_swap:
149   case nir_intrinsic_bindless_image_atomic_comp_swap:
150   case nir_intrinsic_image_atomic_inc_wrap:
151   case nir_intrinsic_bindless_image_atomic_inc_wrap:
152      type = nir_type_uint;
153      break;
154
155   case nir_intrinsic_image_atomic_imin:
156   case nir_intrinsic_bindless_image_atomic_imin:
157   case nir_intrinsic_image_atomic_imax:
158   case nir_intrinsic_bindless_image_atomic_imax:
159      type = nir_type_int;
160      break;
161
162   default:
163      unreachable("Unhandled NIR image intrinsic");
164   }
165
166   switch (type) {
167   case nir_type_uint:
168      return bit_size == 16 ? TYPE_U16 : TYPE_U32;
169   case nir_type_int:
170      return bit_size == 16 ? TYPE_S16 : TYPE_S32;
171   case nir_type_float:
172      return bit_size == 16 ? TYPE_F16 : TYPE_F32;
173   default:
174      unreachable("bad type");
175   }
176}
177
178/* Returns the number of components for the different image formats
179 * supported by the GLES 3.1 spec, plus those added by the
180 * GL_NV_image_formats extension.
181 */
182unsigned
183ir3_get_num_components_for_image_format(enum pipe_format format)
184{
185   if (format == PIPE_FORMAT_NONE)
186      return 4;
187   else
188      return util_format_get_nr_components(format);
189}
190