• Paul Eggert's avatar
    Simplify, port and tune bool vector implementation. · 2cf00efc
    Paul Eggert authored
    * configure.ac (BITSIZEOF_SIZE_T, SIZEOF_SIZE_T): Remove.
    * src/alloc.c (bool_vector_exact_payload_bytes)
    (bool_vector_payload_bytes): Remove.
    (bool_vector_fill): Return its argument.
    * src/alloc.c (bool_vector_fill):
    * src/lread.c (read1):
    * src/print.c (print_object):
    Simplify by using bool_vector_bytes.
    * src/alloc.c (make_uninit_bool_vector):
    New function, broken out from Fmake_bool_vector.
    (Fmake_bool_vector): Use it.  Use tail call.
    (make_uninit_bool_vector, vector_nbytes): Simplify size calculations.
    * src/data.c (BITS_PER_ULL): New constant.
    (ULLONG_MAX, count_one_bits_ll): Fall back on long counterparts
    if long long versions don't exist.
    (shift_right_ull): New function.
    (count_one_bits_word): New function, replacing popcount_bits_word
    macro.  Don't assume that bits_word is no wider than long long.
    (count_one_bits_word, count_trailing_zero_bits):
    Don't assume that bits_word is no wider than long long.
    * src/data.c (bool_vector_binop_driver, bool_vector_not):
    * src/fns.c (Fcopy_sequence):
    * src/lread.c (read1):
    Create an uninitialized destination, to avoid needless work.
    (internal_equal): Simplify.
    (Ffillarray): Prefer tail call.
    * src/data.c (bool_vector_binop_driver): Don't assume bit vectors always
    contain at least one word.
    (bits_word_to_host_endian): Prefer if to #if.  Don't assume
    chars are narrower than ints.
    * src/data.c (Fbool_vector_count_matches, Fbool_vector_count_matches_at):
    * src/fns.c (Fcopy_sequence):
    Simplify and tune.
    * src/lisp.h (bits_word, BITS_WORD_MAX, BITS_PER_BITS_WORD):
    Don't try to port to hosts where bits_word values have holes; the
    code wouldn't work there anyway.  Verify this assumption, though.
    (bool_vector_bytes): New function.
    (make_uninit_bool_vector): New decl.
    (bool_vector_fill): Now returns Lisp_Object.
    2cf00efc
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