src/mesa/drivers/dri/i965/brw_nir_uniforms.cpp

   1 /*
   2  * Copyright © 2015 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/brw_nir.h"
  25 #include "compiler/glsl/ir_uniform.h"
  26
  27 static void
  28 brw_nir_setup_glsl_builtin_uniform(nir_variable *var,
  29                                    const struct gl_program *prog,
  30                                    struct brw_stage_prog_data *stage_prog_data,
  31                                    bool is_scalar)
  32 {
  33    const nir_state_slot *const slots = var->state_slots;
  34    assert(var->state_slots != NULL);
  35
  36    unsigned uniform_index = var->data.driver_location / 4;
  37    for (unsigned int i = 0; i < var->num_state_slots; i++) {
  38       /* This state reference has already been setup by ir_to_mesa, but we'll
  39        * get the same index back here.
  40        */
  41       int index = _mesa_add_state_reference(prog->Parameters,
  42                                             (gl_state_index *)slots[i].tokens);
  43
  44       /* Add each of the unique swizzles of the element as a parameter.
  45        * This'll end up matching the expected layout of the
  46        * array/matrix/structure we're trying to fill in.
  47        */
  48       int last_swiz = -1;
  49       for (unsigned j = 0; j < 4; j++) {
  50          int swiz = GET_SWZ(slots[i].swizzle, j);
  51
  52          /* If we hit a pair of identical swizzles, this means we've hit the
  53           * end of the builtin variable.  In scalar mode, we should just quit
  54           * and move on to the next one.  In vec4, we need to continue and pad
  55           * it out to 4 components.
  56           */
  57          if (swiz == last_swiz && is_scalar)
  58             break;
  59
  60          last_swiz = swiz;
  61
  62          stage_prog_data->param[uniform_index++] =
  63             &prog->Parameters->ParameterValues[index][swiz];
  64       }
  65    }
  66 }
  67
  68 static void
  69 setup_vec4_uniform_value(const gl_constant_value **params,
  70                          const gl_constant_value *values,
  71                          unsigned n)
  72 {
  73    static const gl_constant_value zero = { 0 };
  74
  75    for (unsigned i = 0; i < n; ++i)
  76       params[i] = &values[i];
  77
  78    for (unsigned i = n; i < 4; ++i)
  79       params[i] = &zero;
  80 }
  81
  82 static void
  83 brw_setup_image_uniform_values(gl_shader_stage stage,
  84                                struct brw_stage_prog_data *stage_prog_data,
  85                                unsigned param_start_index,
  86                                const gl_uniform_storage *storage)
  87 {
  88    const gl_constant_value **param =
  89       &stage_prog_data->param[param_start_index];
  90
  91    for (unsigned i = 0; i < MAX2(storage->array_elements, 1); i++) {
  92       const unsigned image_idx = storage->opaque[stage].index + i;
  93       const brw_image_param *image_param =
  94          &stage_prog_data->image_param[image_idx];
  95
  96       /* Upload the brw_image_param structure.  The order is expected to match
  97        * the BRW_IMAGE_PARAM_*_OFFSET defines.
  98        */
  99       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SURFACE_IDX_OFFSET,
 100          (const gl_constant_value *)&image_param->surface_idx, 1);
 101       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_OFFSET_OFFSET,
 102          (const gl_constant_value *)image_param->offset, 2);
 103       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SIZE_OFFSET,
 104          (const gl_constant_value *)image_param->size, 3);
 105       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_STRIDE_OFFSET,
 106          (const gl_constant_value *)image_param->stride, 4);
 107       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_TILING_OFFSET,
 108          (const gl_constant_value *)image_param->tiling, 3);
 109       setup_vec4_uniform_value(param + BRW_IMAGE_PARAM_SWIZZLING_OFFSET,
 110          (const gl_constant_value *)image_param->swizzling, 2);
 111       param += BRW_IMAGE_PARAM_SIZE;
 112
 113       brw_mark_surface_used(
 114          stage_prog_data,
 115          stage_prog_data->binding_table.image_start + image_idx);
 116    }
 117 }
 118
 119 static void
 120 brw_nir_setup_glsl_uniform(gl_shader_stage stage, nir_variable *var,
 121                            const struct gl_program *prog,
 122                            struct brw_stage_prog_data *stage_prog_data,
 123                            bool is_scalar)
 124 {
 125    int namelen = strlen(var->name);
 126
 127    /* The data for our (non-builtin) uniforms is stored in a series of
 128     * gl_uniform_storage structs for each subcomponent that
 129     * glGetUniformLocation() could name.  We know it's been set up in the same
 130     * order we'd walk the type, so walk the list of storage and find anything
 131     * with our name, or the prefix of a component that starts with our name.
 132     */
 133    unsigned uniform_index = var->data.driver_location / 4;
 134    for (unsigned u = 0; u < prog->sh.data->NumUniformStorage; u++) {
 135       struct gl_uniform_storage *storage =
 136          &prog->sh.data->UniformStorage[u];
 137
 138       if (storage->builtin || storage->type->is_sampler())
 139          continue;
 140
 141       if (strncmp(var->name, storage->name, namelen) != 0 ||
 142           (storage->name[namelen] != 0 &&
 143            storage->name[namelen] != '.' &&
 144            storage->name[namelen] != '[')) {
 145          continue;
 146       }
 147
 148       if (storage->type->is_image()) {
 149          brw_setup_image_uniform_values(stage, stage_prog_data,
 150                                         uniform_index, storage);
 151          uniform_index +=
 152             BRW_IMAGE_PARAM_SIZE * MAX2(storage->array_elements, 1);
 153       } else {
 154          gl_constant_value *components = storage->storage;
 155          unsigned vector_count = (MAX2(storage->array_elements, 1) *
 156                                   storage->type->matrix_columns);
 157          unsigned vector_size = storage->type->vector_elements;
 158          unsigned max_vector_size = 4;
 159          if (storage->type->base_type == GLSL_TYPE_DOUBLE ||
 160              storage->type->base_type == GLSL_TYPE_UINT64 ||
 161              storage->type->base_type == GLSL_TYPE_INT64) {
 162             vector_size *= 2;
 163             if (vector_size > 4)
 164                max_vector_size = 8;
 165          }
 166
 167          for (unsigned s = 0; s < vector_count; s++) {
 168             unsigned i;
 169             for (i = 0; i < vector_size; i++) {
 170                stage_prog_data->param[uniform_index++] = components++;
 171             }
 172
 173             if (!is_scalar) {
 174                /* Pad out with zeros if needed (only needed for vec4) */
 175                for (; i < max_vector_size; i++) {
 176                   static const gl_constant_value zero = { 0.0 };
 177                   stage_prog_data->param[uniform_index++] = &zero;
 178                }
 179             }
 180          }
 181       }
 182    }
 183 }
 184
 185 void
 186 brw_nir_setup_glsl_uniforms(nir_shader *shader, const struct gl_program *prog,
 187                             struct brw_stage_prog_data *stage_prog_data,
 188                             bool is_scalar)
 189 {
 190    nir_foreach_variable(var, &shader->uniforms) {
 191       /* UBO's, atomics and samplers don't take up space in the
 192          uniform file */
 193       if (var->interface_type != NULL || var->type->contains_atomic())
 194          continue;
 195
 196       if (strncmp(var->name, "gl_", 3) == 0) {
 197          brw_nir_setup_glsl_builtin_uniform(var, prog, stage_prog_data,
 198                                             is_scalar);
 199       } else {
 200          brw_nir_setup_glsl_uniform(shader->stage, var, prog, stage_prog_data,
 201                                     is_scalar);
 202       }
 203    }
 204 }
 205
 206 void
 207 brw_nir_setup_arb_uniforms(nir_shader *shader, struct gl_program *prog,
 208                            struct brw_stage_prog_data *stage_prog_data)
 209 {
 210    struct gl_program_parameter_list *plist = prog->Parameters;
 211
 212    /* For ARB programs, prog_to_nir generates a single "parameters" variable
 213     * for all uniform data.  nir_lower_wpos_ytransform may also create an
 214     * additional variable.
 215     */
 216    assert(shader->uniforms.length() <= 2);
 217
 218    for (unsigned p = 0; p < plist->NumParameters; p++) {
 219       /* Parameters should be either vec4 uniforms or single component
 220        * constants; matrices and other larger types should have been broken
 221        * down earlier.
 222        */
 223       assert(plist->Parameters[p].Size <= 4);
 224
 225       unsigned i;
 226       for (i = 0; i < plist->Parameters[p].Size; i++) {
 227          stage_prog_data->param[4 * p + i] = &plist->ParameterValues[p][i];
 228       }
 229       for (; i < 4; i++) {
 230          static const gl_constant_value zero = { 0.0 };
 231          stage_prog_data->param[4 * p + i] = &zero;
 232       }
 233    }
 234 }