Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uflorida!haven!udel!mmdf From: I5110401%DBSTU1.BITNET@cornellc.cit.cornell.edu Newsgroups: comp.os.minix Subject: ST: new _csb.s,_dvi.s,_dvu.s,_mli.s,_mlu.s for a small speedup Message-ID: <8602@nigel.udel.EDU> Date: 18 Jan 90 14:46:43 GMT Sender: mmdf@udel.EDU Lines: 122 Hi *, here are some files i rewrote or altered some time ago for having some more speed with ACK C (which i no longer use, but that's another story). _csb.s contains ACK's case selector routine; my one is rather cryptic but makes efficient use of the 68000 instruction set, thus being a bit faster. _mli.s and _mlu.s do long by long multiplications. There has been a posting with a new _mli some time ago (by RAL). I found that code hard to read, so i wrote my own one, which besides is slightly faster in the common case of multiplying 16-bit-only numbers. _dvi.s and _dvu.s are just slightly modified versions of the original ones, dealing with two special cases to reduce the shift amount (shifts are expensive on a 68000). Enjoy, --- Kai-Uwe Bloem, I5110401@dbstu1.bitnet --- PS: Thanks to you, Glen, for fixing that info-minix mailing problem. 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