Am 26.04.2015 um 23:39 schrieb Georg Hieber: > Hello, > > I started to implement parts of the rtl system unit for avr in assembler. > First results are > encouraging: fpc_move takes 29 opcodes compared to 104 of the Pascal version > already optimized for > the platform, and 23:150 for fpc_mul_word. > > Of course, I want to be as efficient as possible in this task, and first > convert routines that are > either > > - called often, to reduce execution time, or > - linked into most binaries, to reduce code size. > > I made my own priority list, starting with the essential string routines and > arithmetic helpers, but > due to lack of experience I certainly overlooked things or overestimated > others. So, question to > everybody: > > Which are according to your experience / opinion the library routines that > profit most from being > implemented in assembler, considering an embedded environment? (so, nothing > about file I/O, system > call wrappers, etc.) >
As you said, arithmetics and string helpers, further, "bit fiddling routines" (bsr, bsf, rol, ror, sar), fillchar and maybe the set helpers. _______________________________________________ fpc-devel maillist - [email protected] http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
