bit_length       2400 bignum.c                   zds[yn] = bary_small_lshift(zds, yds, yn, bit_length(xds[0])-1);
bit_length       2574 bignum.c               bary_small_rshift(qds, xds, xn, bit_length(y)-1, x_higher_bdigit);
bit_length       4179 bignum.c       			       bit_length(base-1));
bit_length       4254 bignum.c                   bit_length(base-1));
bit_length       4578 bignum.c           shift_numdigits = (lens[0] >> bit_length(BITSPERDIG-1)) |
bit_length       4579 bignum.c             (lens[1] << (CHAR_BIT*SIZEOF_SIZE_T - bit_length(BITSPERDIG-1)));
bit_length       6565 bignum.c                   shift_numdigits = shift >> bit_length(BITSPERDIG-1);
bit_length       6595 bignum.c                   shift_numdigits = shift >> bit_length(BITSPERDIG-1);
bit_length       4466 numeric.c          return LONG2FIX(bit_length(v));