On Wed, 13 Apr 2011, Paulo J. Matos wrote: > I have been looking at the fp-bit code and noticed:
> In my port I am having some trouble with the truncation from df to sf. Unless your port is outside the scope of what soft-fp supports (for example, soft-fp probably won't work for systems with 16-bit int, and such systems may also be too space-constrained for the soft-fp code) I'd advise using soft-fp instead of fp-bit for a new port since it's significantly faster (although the code is a bit larger). (For that matter, I encourage converting existing ports from fp-bit to soft-fp for the same reason - though you may wish to benchmark for your target to confirm you get similar speedups to those seen on Power Architecture processors.) > I wonder if there's any doc reference upon which the code was based to do the > truncation. I can't really find anything and even though the code is not hard > I am still missing something. The soft-fp code is, however, somewhat harder to understand than the less highly optimized fp-bit code. -- Joseph S. Myers jos...@codesourcery.com
