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- Path: sparky!uunet!olivea!sgigate!odin!fido!knobi.munich.sgi.com!knobi
- From: knobi@knobi.munich.sgi.com (Martin Knoblauch)
- Newsgroups: comp.sys.sgi
- Subject: Re: Indigo R4000 vs. R3000 4D/35
- Message-ID: <1ijms5INNg3u@fido.asd.sgi.com>
- Date: 8 Jan 93 11:00:21 GMT
- References: <1993Jan7.142834.7127@jarvis.csri.toronto.edu> <1ijjo9INN6mf@fido.asd.sgi.com>
- Organization: Silicon Graphics, Inc.
- Lines: 24
- NNTP-Posting-Host: knobi.munich.sgi.com
-
- In article <1ijjo9INN6mf@fido.asd.sgi.com>, knobi@knobi.munich.sgi.com
- (Martin Knoblauch) writes:
- |>
- |> To get more speedup you can try a few things:
- |>
- |> a) use '-mips2'. This makes use of special hardware instructuions
- |> of the R4K processor (double word (8 byte) load/store, sqrt) and
- |> can give some more speed, especially if you use a lot of sqrt
- |> operations, or move a lot of double variables around.
-
- I forgot to mention one drawback of '-mips2'. You cannot run that
- code on R3000 based machines.
-
-
- Martin
- +---------------------------------+----------------------------------+
- |Martin Knoblauch | Silicon Graphics GmbH |
- |Application Support | Am Hochacker 3 - Technopark |
- |Silicon Graphics Computer Systems| W-8011 Grasbrunn-Neukeferloh, FRG|
- | | Phone: (+int) 89 46108-179 or -0 |
- | | Fax: (+int) 89 46108-222 |
- +---------------------------------+----------------------------------+
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