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 struct ir3_instruction *
  43 ir3_ssbo_to_ibo(struct ir3_context *ctx, nir_src src)
  44 {
  45         if (ir3_bindless_resource(src)) {
  46                 ctx->so->bindless_ibo = true;
  47                 return ir3_get_src(ctx, &src)[0];
  48         } else {
  49                 /* can this be non-const buffer_index?  how do we handle that? */
  50                 int ssbo_idx = nir_src_as_uint(src);
  51                 return create_immed(ctx->block, ssbo_idx);
  52         }
  53 }
  54
  55 unsigned
  56 ir3_ssbo_to_tex(struct ir3_ibo_mapping *mapping, unsigned ssbo)
  57 {
  58         if (mapping->ssbo_to_tex[ssbo] == IBO_INVALID) {
  59                 unsigned tex = mapping->num_tex++;
  60                 mapping->ssbo_to_tex[ssbo] = tex;
  61                 mapping->tex_to_image[tex] = IBO_SSBO | ssbo;
  62         }
  63         return mapping->ssbo_to_tex[ssbo] + mapping->tex_base;
  64 }
  65
  66 struct ir3_instruction *
  67 ir3_image_to_ibo(struct ir3_context *ctx, nir_src src)
  68 {
  69         if (ir3_bindless_resource(src)) {
  70                 ctx->so->bindless_ibo = true;
  71                 return ir3_get_src(ctx, &src)[0];
  72         } else {
  73                 /* can this be non-const buffer_index?  how do we handle that? */
  74                 int image_idx = nir_src_as_uint(src);
  75                 return create_immed(ctx->block, ctx->s->info.num_ssbos + image_idx);
  76         }
  77 }
  78
  79 unsigned
  80 ir3_image_to_tex(struct ir3_ibo_mapping *mapping, unsigned image)
  81 {
  82         if (mapping->image_to_tex[image] == IBO_INVALID) {
  83                 unsigned tex = mapping->num_tex++;
  84                 mapping->image_to_tex[image] = tex;
  85                 mapping->tex_to_image[tex] = image;
  86         }
  87         return mapping->image_to_tex[image] + mapping->tex_base;
  88 }
  89
  90 /* see tex_info() for equiv logic for texture instructions.. it would be
  91  * nice if this could be better unified..
  92  */
  93 unsigned
  94 ir3_get_image_coords(const nir_intrinsic_instr *instr, unsigned *flagsp)
  95 {
  96         unsigned coords = nir_image_intrinsic_coord_components(instr);
  97         unsigned flags = 0;
  98
  99         if (coords == 3)
 100                 flags |= IR3_INSTR_3D;
 101
 102         if (nir_intrinsic_image_array(instr))
 103                 flags |= IR3_INSTR_A;
 104
 105         if (flagsp)
 106                 *flagsp = flags;
 107
 108         return coords;
 109 }
 110
 111 type_t
 112 ir3_get_type_for_image_intrinsic(const nir_intrinsic_instr *instr)
 113 {
 114         const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic];
 115         int bit_size = info->has_dest ? nir_dest_bit_size(instr->dest) : 32;
 116         enum pipe_format format = nir_intrinsic_format(instr);
 117
 118         if (util_format_is_pure_uint(format))
 119                 return bit_size == 16 ? TYPE_U16 : TYPE_U32;
 120         else if (util_format_is_pure_sint(format))
 121                 return bit_size == 16 ? TYPE_S16 : TYPE_S32;
 122         else
 123                 return bit_size == 16 ? TYPE_F16 : TYPE_F32;
 124 }
 125
 126 /* Returns the number of components for the different image formats
 127  * supported by the GLES 3.1 spec, plus those added by the
 128  * GL_NV_image_formats extension.
 129  */
 130 unsigned
 131 ir3_get_num_components_for_image_format(enum pipe_format format)
 132 {
 133         if (format == PIPE_FORMAT_NONE)
 134                 return 4;
 135         else
 136                 return util_format_get_nr_components(format);
 137 }