SPA_ASIZEBITS
BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \
BF64_GET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, SPA_MINBLOCKSHIFT, 0)
BF64_SET_SB((dva)->dva_word[0], 0, SPA_ASIZEBITS, \