Giovanni Mascellani (@giomasce) commented about libs/vkd3d-shader/vkd3d_shader_private.h:
uint64_t immconst_uint64[VKD3D_DVEC2_SIZE]; double immconst_double[VKD3D_DVEC2_SIZE]; unsigned fp_body_idx;
enum vkd3d_data_type ssa_data_type;
What's the difference with the `data_type` field?