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From: den@hpfinote.HP.COM (Don Novy)
Newsgroups: comp.sys.m68k
Subject: Why no fcmp/fbcc on 68040?
Message-ID: <16340002@hpfinote.HP.COM>
Date: 5 Jun 90 22:46:43 GMT
Organization: Hewlett Packard CICD
Lines: 12


  I have read some articles about the 68040 and am confused about one point.
Why have the fcmp and fbcc instructions been eliminated from the floating point
unit? I have found these instructions to be VERY helpful in speeding up some
double precision floating point intensive software. One program was sped up by
23% by using fcmp and fbcc instead of 68020 instructions (cmp.l).

  Any ideas?

  Don Novy
  Hewlett-Packard
  den@hpfitst2.hp.com