src/intel/vulkan/bvh/header.comp

/* Copyright © 2024 Valve Corporation
 * Copyright © 2024 Intel Corporation
 * SPDX-License-Identifier: MIT
 */

#version 460

#extension GL_GOOGLE_include_directive : require

#extension GL_EXT_shader_explicit_arithmetic_types_int8 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int16 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int32 : require
#extension GL_EXT_shader_explicit_arithmetic_types_int64 : require
#extension GL_EXT_shader_explicit_arithmetic_types_float16 : require
#extension GL_EXT_scalar_block_layout : require
#extension GL_EXT_buffer_reference : require
#extension GL_EXT_buffer_reference2 : require

layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;

#include "anv_build_interface.h"

layout(push_constant) uniform CONSTS
{
   header_args args;
};

void
main(void)
{
   uint32_t compacted_size =
      args.bvh_offset + DEREF(args.src).dst_node_offset * ANV_RT_BLOCK_SIZE;

   uint32_t serialization_size = compacted_size +
      SIZEOF(vk_accel_struct_serialization_header) + SIZEOF(uint64_t) *
      args.instance_count;

   DEREF(args.dst).compacted_size = compacted_size;
   DEREF(args.dst).size = compacted_size;
   DEREF(args.dst).serialization_size = serialization_size;
   DEREF(args.dst).self_ptr = uint64_t(args.dst);
   DEREF(args.dst).instance_count = args.instance_count;

   /* 128 is local_size_x in copy.comp shader, 8 is the amount of data
    * copied by each iteration of that shader's loop
    */
   DEREF(args.dst).copy_dispatch_size[0] = DIV_ROUND_UP(compacted_size, 8 * 128);
   DEREF(args.dst).copy_dispatch_size[1] = 1;
   DEREF(args.dst).copy_dispatch_size[2] = 1;
#if GFX_VERx10 >= 300
   DEREF(args.dst).enable_64b_rt = 1;
#else
   DEREF(args.dst).enable_64b_rt = 0;
#endif
}