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- Newsgroups: comp.sys.sgi
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!mips!odin!fido!zola!zuni!anchor!olson
- From: olson@anchor.esd.sgi.com (Dave Olson)
- Subject: Re: R4000 compiler directive, is there one ???
- Message-ID: <ogn3in4@zuni.esd.sgi.com>
- Sender: news@zuni.esd.sgi.com (Net News)
- Organization: Silicon Graphics, Inc. Mountain View, CA
- References: <ob1oc18@zuni.esd.sgi.com> <1992Aug12.195518.12380@megatek.uucp>
- Date: Thu, 13 Aug 92 05:25:57 GMT
- Lines: 22
-
- In <1992Aug12.195518.12380@megatek.uucp> rgs@megatek.uucp (Rusty Sanders) writes:
- | From article <ob1oc18@zuni.esd.sgi.com>, by olson@anchor.esd.sgi.com (Dave Olson):
- | > One thing to add to John's response. -mips2 is the way to
- | > turn on some of the r4k features (more specifically, those
- | > in the r6k, such as hardware squareroot).
- | > [more about -mips2]
- |
- | I seem to remember seeing in some version or other of the compiler
- | (sorry, I don't know if it was beta, release, or what) that there
- | was a switch -r4000. The switch had no effect on the output code,
- | but was used by the instruction scheduler in the assembler.
- | To check to see if you have it (other then just trying it) you can
- | do a strings /usr/bin/cc|grep 4000 and see what shows up.
-
- It is passed on to the assembler untouched, and the comments there
- lead me to believe your recollection about instruction scheduling
- is correct, but I don't know enough about compilers to know what
- exactly (if anything!) it is doing.
- --
- Let no one tell me that silence gives consent, | Dave Olson
- because whoever is silent dissents. | Silicon Graphics, Inc.
- Maria Isabel Barreno | olson@sgi.com
-