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- Path: nntp.teleport.com!sschaem
- From: sschaem@teleport.com (Stephan Schaem)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: TMapping again!
- Date: 3 Mar 1996 04:03:45 GMT
- Organization: Teleport - Portland's Public Access (503) 220-1016
- Distribution: world
- Message-ID: <4hb5n1$r52@maureen.teleport.com>
- References: <38232686@kone.fipnet.fi> <4h0agu$6n9@maureen.teleport.com> <38232763@kone.fipnet.fi>
- NNTP-Posting-Host: julie.teleport.com
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-
- Jyrki Saarinen (jsaarinen@kone.fipnet.fi) wrote:
-
- : > : > on x86 doing a 32bit immediate add is as fast as a reg to register
- : > : > add?
- : >
- : > : Should be, like on a 040.
- : >
- : > On the 040/030 , because of the code/data cache are separate the
- : > CPU in '1' cycle can access both... but on the x86 I was not sure
- : > it could do that. I dont think I will ever do serious x86 programming
- : > but Its good to know things like this
-
- : Hmm, I am not sure if add.l d0,d1 is as fast add.l #$12345678,d1
- : on the 68030. Propably not.
-
- Its not, I knew that it is on the 040 and I assumed the same on the
- 030... but imediate cost you extra cycle.
-
- Stephan
-
-