Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!bu.edu!snorkelwacker.mit.edu!paperboy!meissner From: meissner@osf.org (Michael Meissner) Newsgroups: comp.arch Subject: Re: RISC integer multiply/divide (was Re: Snake) Message-ID: Date: 3 Apr 91 18:38:52 GMT References: <32580004@hpcuhe.cup.hp.com> <1991Mar26.221120.6725@webo.dg.com> <6920@auspex.auspex.com> <3237@charon.cwi.nl> Sender: news@OSF.ORG Organization: Open Software Foundation Lines: 16 In-reply-to: dik@cwi.nl's message of 1 Apr 91 00:28:14 GMT In article <3237@charon.cwi.nl> dik@cwi.nl (Dik T. Winter) writes: | Now this is a bit slippery (checking the 32*32->64 bit multiply and | 64/32->32,32 bit divide; this may be old hat, and, what is RISC?): | m88k: full support (no remainder & no 64 bit res/src, uses FP) While it doesn't have a 32x32->64 bit multiply, the multiply unit is pipelined, so that you can do a 32x32->64 bit multiply in about 13 clocks (including separating the two 32 bit numbers into 16 bit pieces, doing 4 pipelined multiplies, and merging the results). -- Michael Meissner email: meissner@osf.org phone: 617-621-8861 Open Software Foundation, 11 Cambridge Center, Cambridge, MA, 02142 Considering the flames and intolerance, shouldn't USENET be spelled ABUSENET?