src/freedreno/ir3/ir3_image.c

   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 /*
  31  * SSBO/Image to/from IBO/tex hw mapping table:
  32  */
  33
  34 void
  35 ir3_ibo_mapping_init(struct ir3_ibo_mapping *mapping, unsigned num_textures)
  36 {
  37         memset(mapping, IBO_INVALID, sizeof(*mapping));
  38         mapping->num_tex = 0;
  39         mapping->tex_base = num_textures;
  40 }
  41
  42 unsigned
  43 ir3_ssbo_to_ibo(struct ir3_shader *shader, unsigned ssbo)
  44 {
  45         return ssbo;
  46 }
  47
  48 unsigned
  49 ir3_ssbo_to_tex(struct ir3_ibo_mapping *mapping, unsigned ssbo)
  50 {
  51         if (mapping->ssbo_to_tex[ssbo] == IBO_INVALID) {
  52                 unsigned tex = mapping->num_tex++;
  53                 mapping->ssbo_to_tex[ssbo] = tex;
  54                 mapping->tex_to_image[tex] = IBO_SSBO | ssbo;
  55         }
  56         return mapping->ssbo_to_tex[ssbo] + mapping->tex_base;
  57 }
  58
  59 unsigned
  60 ir3_image_to_ibo(struct ir3_shader *shader, unsigned image)
  61 {
  62         return shader->nir->info.num_ssbos + image;
  63 }
  64
  65 unsigned
  66 ir3_image_to_tex(struct ir3_ibo_mapping *mapping, unsigned image)
  67 {
  68         if (mapping->image_to_tex[image] == IBO_INVALID) {
  69                 unsigned tex = mapping->num_tex++;
  70                 mapping->image_to_tex[image] = tex;
  71                 mapping->tex_to_image[tex] = image;
  72         }
  73         return mapping->image_to_tex[image] + mapping->tex_base;
  74 }
  75
  76 /* see tex_info() for equiv logic for texture instructions.. it would be
  77  * nice if this could be better unified..
  78  */
  79 unsigned
  80 ir3_get_image_coords(const nir_intrinsic_instr *instr, unsigned *flagsp)
  81 {
  82         unsigned coords = nir_image_intrinsic_coord_components(instr);
  83         unsigned flags = 0;
  84
  85         if (coords == 3)
  86                 flags |= IR3_INSTR_3D;
  87
  88         if (nir_intrinsic_image_array(instr))
  89                 flags |= IR3_INSTR_A;
  90
  91         if (flagsp)
  92                 *flagsp = flags;
  93
  94         return coords;
  95 }
  96
  97 type_t
  98 ir3_get_type_for_image_intrinsic(const nir_intrinsic_instr *instr)
  99 {
 100         const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic];
 101         int bit_size = info->has_dest ? nir_dest_bit_size(instr->dest) : 32;
 102         enum pipe_format format = nir_intrinsic_format(instr);
 103
 104         if (util_format_is_pure_uint(format))
 105                 return bit_size == 16 ? TYPE_U16 : TYPE_U32;
 106         else if (util_format_is_pure_sint(format))
 107                 return bit_size == 16 ? TYPE_S16 : TYPE_S32;
 108         else
 109                 return bit_size == 16 ? TYPE_F16 : TYPE_F32;
 110 }
 111
 112 /* Returns the number of components for the different image formats
 113  * supported by the GLES 3.1 spec, plus those added by the
 114  * GL_NV_image_formats extension.
 115  */
 116 unsigned
 117 ir3_get_num_components_for_image_format(enum pipe_format format)
 118 {
 119         if (format == PIPE_FORMAT_NONE)
 120                 return 4;
 121         else
 122                 return util_format_get_nr_components(format);
 123 }