EFX_BYTE_FIELD
EFX_BYTE_FIELD(*MCDI_OUT2(_emr, efx_byte_t, _ofst), \
switch (EFX_BYTE_FIELD(byte, TAG_TYPE)) {
name = EFX_BYTE_FIELD(byte, TAG_SMALL_ITEM_NAME);
length = (uint16_t)EFX_BYTE_FIELD(byte, TAG_SMALL_ITEM_SIZE);
name = EFX_BYTE_FIELD(byte, TAG_LARGE_ITEM_NAME);
data[offset] = EFX_BYTE_FIELD(byte, EFX_BYTE_0);