#version 450

#extension GL_EXT_buffer_reference : require

layout(local_size_x = 1) in;

layout(constant_id = 0) const uint c_arg_count = 0;
layout(constant_id = 1) const bool c_arg_indirect = false;

layout(std430, buffer_reference, buffer_reference_align = 4)
readonly buffer predicate_t {
  uint data;
};

layout(std430, buffer_reference, buffer_reference_align = 4)
readonly buffer src_args_t {
  uint data[];
};

layout(std430, buffer_reference, buffer_reference_align = 4)
writeonly buffer dst_args_t {
  uint data[];
};

layout(push_constant)
uniform u_info_t {
  predicate_t predicate;
  src_args_t src_args;
  dst_args_t dst_args;
  uint cmd_args[5];
};

void main() {
  bool do_exec = predicate.data != 0;

  for (uint i = 0; i < c_arg_count; i++) {
    uint arg = c_arg_indirect ? src_args.data[i] : cmd_args[i];
    dst_args.data[i] = do_exec ? arg : 0u;
  }
}