Subject: Re: m68k suggestion
To: Erik E. Fair <email@example.com>
From: Todd Vierling <firstname.lastname@example.org>
Date: 04/19/1999 17:36:02
On Mon, 19 Apr 1999, Erik E. Fair wrote:
: As I understood it, NetBSD already configures gcc for "mc68020" as the
: baseline minimum, but no higher so that a binary built on one m68k system
: will run on all of them. Users can, of course, recompile their worlds to
: optimize for what they have.
Right. What -m68020-40 does is a little different, though: it uses only
MC68020 or higher instructions, leaves out those instructions that are
troublesome on 68040, and tunes the instruction scheduler to the instruction
_timings_ of the 68040. It's like -m68020 -mtune=68040 but not quite.
AFAIK, there isn't a -m68020-60, but I could be mistaken as I haven't looked
at the m68k gcc configs in a while.
-- Todd Vierling (Personal email@example.com; Bus. firstname.lastname@example.org)