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- Path: informatik.tu-muenchen.de!fischerj
- From: fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer)
- Newsgroups: comp.sys.amiga.programmer
- Subject: Re: PPC compilers
- Date: 4 Jan 1996 13:43:40 GMT
- Organization: Technische Universitaet Muenchen, Germany
- Distribution: world
- Message-ID: <4cglic$b8n@sunsystem5.informatik.tu-muenchen.de>
- References: <john.hendrikx.40ka@grafix.xs4all.nl> <19951223.57F728.6866@sisyphus.demon.co.uk> <4bqdk8$6g5@sunsystem5.informatik.tu-muenchen.de> <19951227.542040.7590@sisyphus.demon.co.uk> <4c9h7d$h3i@sunsystem5.informatik.tu-muenchen.de> <19960102.46B6B0.1171E@sisyphus.demon.co.uk>
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-
- Dave.Sparks@sisyphus.demon.co.uk wrote:
-
- : JF> AFTER THE OPERAND IS USED, IT IS INCREMENTED by one, two or four
- : JF> [...]"
-
- : My original post used PREDECREMENT, not postincrement.
-
- :)
-
- as Hitatchi quotes seem to be accepted ;)
- "...Bevore the operand is used, it is decremented..."
-
- same thing ;)
-
- : JF> I would interpret "after operand is used" that way:
-
- : JF> when data from (a0) is read, a0 was used (used to build an adress).
- : JF> so a0 is incremented. then data is written at (a0)+.
-
- : "after the operand is used" does not necessarily mean "before
- : the other operand is used". A good definition leaves nothing
- : to "interpretation".
-
- agree.
-
- Is there any definition, that tells if a0 is incremented bevore it's
- usgae in a following instruction ? ;)
-
- Motorola would maybe let the 080 misbehave anyway. like all 68010+ misbehave
- when loading sr->Dn.
-
- : You were criticising C because its definition very carefully
- : states that the order of evaluation of expressions between control
-
- I was NOT criticising this.
-
- : do not give uniformly predictable results. You then claim that
- : assembly code is better because the assembly code definition gives
- : no such warning for
-
- : MOVE.L -(A0),-(A0)
-
- I did NOT claim this.
-
- : >> -- Dave.Sparks@sisyphus.demon.co.uk (Staffordshire, England)
- ------------------------------------------------------------------------
- fischerj@Informatik.TU-Muenchen.DE (Juergen "Rally" Fischer) =:)
-
-