home *** CD-ROM | disk | FTP | other *** search
- Path: ifi.uio.no!usenet
- From: ludvigp@ifi.uio.no (Ludvig Pedersen)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: Free cycles after a FAST-write?
- Date: 8 Mar 1996 08:33:45 GMT
- Organization: Dept. of Informatics, University of Oslo, Norway
- Message-ID: <666.6640T1273T725@ifi.uio.no>
- References: <38232831@kone.fipnet.fi>
- NNTP-Posting-Host: gymir.ifi.uio.no
- X-Newsreader: THOR 2.22 (Amiga;TCP/IP)
-
- >I noticed a funny phenomena; I got 4 (four) free one-cycle
- >register instruction after a FAST-ram write on my
- >Warp Engine, 68040/40, SetPatch executed.
-
- >The loop:
- > REPT 32
- > move.l d0,(a0)+ ;a0 points to FAST
- > move.l d1,d1
- > move.l d1,d1
- > move.l d1,d1
- > move.l d1,d1
- > ENDR
-
- I tested that a long time ago, but after I remeber I only got 2 free
- instuctons on my 030/50mhz.
-
- Anyway, its something one should be aware of when optimising.
-
- Its not a funny phenomena but completly normal on fast cpu's.
-
-
- <sb>Ludde - Amiga Demo Coder
- <sb>Virtual Reality & Official Be developer
- <sb>ludvigp@ifi.uio.no
-
-