src/intel/vulkan/anv_nir_lower_push_constants.c

   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 "anv_nir.h"
  25
  26 static bool
  27 lower_push_constants_block(nir_block *block, void *void_state)
  28 {
  29    nir_foreach_instr(block, instr) {
  30       if (instr->type != nir_instr_type_intrinsic)
  31          continue;
  32
  33       nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
  34
  35       /* TODO: Handle indirect push constants */
  36       if (intrin->intrinsic != nir_intrinsic_load_push_constant)
  37          continue;
  38
  39       assert(intrin->const_index[0] % 4 == 0);
  40       assert(intrin->const_index[1] == 128);
  41
  42       /* We just turn them into uniform loads with the appropreate offset */
  43       intrin->intrinsic = nir_intrinsic_load_uniform;
  44    }
  45
  46    return true;
  47 }
  48
  49 void
  50 anv_nir_lower_push_constants(nir_shader *shader)
  51 {
  52    nir_foreach_function(shader, function) {
  53       if (function->impl)
  54          nir_foreach_block(function->impl, lower_push_constants_block, NULL);
  55    }
  56 }