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- Xref: sparky comp.sys.mac.hardware:26574 comp.sys.mac.system:16490
- Path: sparky!uunet!dziuxsolim.rutgers.edu!gandalf.rutgers.edu!rgonzal
- From: rgonzal@gandalf.rutgers.edu (Ralph Gonzalez)
- Newsgroups: comp.sys.mac.hardware,comp.sys.mac.system
- Subject: Re: FPU for ClassicII
- Message-ID: <Jan.21.14.04.29.1993.7059@gandalf.rutgers.edu>
- Date: 21 Jan 93 19:04:30 GMT
- References: <1jhchiINN7fm@nic.umass.edu> <1jk9v2INNcuu@newsstand.cit.cornell.edu>
- Followup-To: comp.sys.mac.hardware
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 33
-
- flc1@cornell.edu (Fred Chen) writes:
-
- >Venders of FPU's often deceive consumers into buying their products
- >that they claim will considerably boost your computer's performance.
- >NOT! A coprocessor only speeds up computation of COMPLEX mathematical
- >expressions in math intensive programs (ie Mathematica) by freeing the
- >main
- >68030 processor from most of the computational responsibility. However,
- >even if you have a coprocessor, most of the simple math is still computed
- >by the 68030. Spreadsheets, wp, and desktop publishing programs use
- >simple
- >math.
- >Hence, an FPU would hardly increase your computer's performance here.
- [stuff deleted]
-
- An FPU (Floating Point Unit) accelerates floating-point (real number)
- operations significantly -- often by a factor of 50! That means that
- in addition to freeing up the 68030, the FPU is a lot faster than the
- 030 at floating-point operations. I've got some programs which
- actually run 50 times faster with the FPU.
-
- By the way, spreadsheets use floating point arithmetic and therefore
- do benefit from the FPU.
-
- You're right, however, that a lot of day-to-day software shows no
- improvement whatsoever from the addition of an FPU.
-
- -Ralph
-
- --
- Ralph Gonzalez, Computer Science, Rutgers Univ., Camden, NJ
- Phone: (609) 225-6122; Internet: rgonzal@elbereth.rutgers.edu
- --
-