On Tuesday 23 November 2010 20:09:52, Joern Rennecke wrote: > If we changed BITS_PER_UNIT into an ordinary piece-of-data 'hook', this > would not only cost a data load from the target vector, but would also > inhibit optimizations that replace division / modulo / multiply with shift > or mask operations.
Have you done any sort of measurement, to see if what is lost is actually noticeable in practice? > So maybe we should look into having a few functional hooks that do > common operations, i.e. > bits_in_units x / BITS_PER_UNIT > bits_in_units_ceil (x + BITS_PER_UNIT - 1) / BITS_PER_UNIT > bit_unit_remainder x % BITS_PER_UNIT > units_in_bits x * BITS_PER_UNIT -- Pedro Alves
