#include "texture_load.hlsli"

Buffer<uint2> xe_texture_load_source : register(t0);
RWBuffer<uint4> xe_texture_load_dest : register(u0);

[numthreads(2, 32, 1)]
void main(uint3 xe_thread_id : SV_DispatchThreadID) {
  // 1 thread = 16 blocks.
  uint3 block_index = xe_thread_id << uint3(4, 0, 0);
  [branch] if (any(block_index >= xe_texture_load_size_blocks)) {
    return;
  }
  int block_offset_host =
      (XeTextureHostLinearOffset(int3(block_index),
                                 xe_texture_load_size_blocks.y,
                                 xe_texture_load_host_pitch, 1u) +
       xe_texture_load_host_base) >> 4;
  int block_offset_guest =
      XeTextureLoadGuestBlockOffset(int3(block_index), 1u, 0u) >> 3;
  // Odd 8 blocks = even 8 blocks + 64 bytes when tiled.
  xe_texture_load_dest[block_offset_host] = uint4(
      xe_texture_load_source[block_offset_guest],
      xe_texture_load_source[block_offset_guest +
                             (XeTextureLoadIsTiled() ? 8 : 1)]);
}