add_protoqw/unsigned int/,"aom_variance2x2","const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";
specializeqw/aom_variance2x2/;
foreach(@block_sizes){
($w,$h)=@$_;
add_protoqw/unsigned int/,"aom_variance${w}x${h}","const uint8_t *src_ptr, int source_stride, const uint8_t *ref_ptr, int ref_stride, unsigned int *sse";