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1. Adrian Cochrane (alcinnz@floss.social)'s status on Tuesday, 14-Mar-2023 04:11:15 JST Adrian Cochrane

   GNU MultiPrecision includes a "MPF" sublibrary", which I'll summarize today.

   This operates upon an `mpf_t` structure with the following utilities:
   * Accessors (possibly involving validation or bittwiddling/adds/subtracts/absolutes)
   * Wrappers around math operators adding data conversions, some optionally reimplementing the operator.
   * Including a few for random-numbers
   * Accessors for globals
   * Subtract-then-divide with fastpath for 0, a "relative diff"
   * Optimized repeated multiplication

   1/?

   • Adrian Cochrane (alcinnz@floss.social)'s status on Tuesday, 14-Mar-2023 04:31:31 JST Adrian Cochrane

     in reply to

     * Cloning a number flagging it as negative
     * Stringifying
     * Some of these operators wraps MPN routines
     * Others wrap iterations over the digits, or combines the 2
     * Some of them get fairly convoluted with different fastpaths for different cases
     * Swap fields between 2 MPF structs
     * There's tests on the fields
     * Parsing
     * Conversion back to floats
     * Some headerfiles implementing templates to base other routines on
     * Comparing fields for equality or more
     * Subtraction is involved

     2/3!

   • Adrian Cochrane (alcinnz@floss.social)'s status on Tuesday, 14-Mar-2023 04:36:23 JST Adrian Cochrane

     in reply to

     * divide-by-power-of-2 fastpath routine
     * rounding with logic to determine whether to increment
     * multiply-by-power-of-2 fastpath routine
     * Addition's fairly involved too
     * Multiply/divide is more straightforward handing off near directly to MPN

     2.5/2.5 Fin for today! Tomorrow: MPN!