Re: Concertlina II: Full Circle

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Sujet : Re: Concertlina II: Full Circle
De : SFuld (at) *nospam* alumni.cmu.edu.invalid (Stephen Fuld)
Groupes : comp.arch
Date : 18. Jun 2024, 23:42:32
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v4t2gn$1ipeh$1@dont-email.me>
References : 1 2 3 4 5 6 7 8 9
User-Agent : XanaNews/1.21-f3fb89f (x86; Portable ISpell)
Thomas Koenig wrote:

John Savard <quadibloc@servername.invalid> schrieb:
On Tue, 18 Jun 2024 16:17:33 -0000 (UTC), Thomas Koenig
<tkoenig@netcologne.de> wrote:
John Savard <quadibloc@servername.invalid> schrieb:
 
Also, this looping instruction is strictly a way to directly
encode >>> the FORTRAN DO loop. It does not attempt any vectorization.
 
Which one, the FORTRAN 66 one or the one since FORTRAN 77?
 
FORTRAN IV (or 66) indeed.
 
It was actually not defined in the standard, in practice it
was usually implemented by a test at the bottom of the loop,
and programs depended on that.
 
FORTRAN 77 fixed that, so now
 
DO 100 I=1,0
 
...
  100   CONTINUE
 
is executed zero times.


How does VVM handle that?  It sems you must "waste" some time, not
executing the loop body until the furst LOOP instruction tells you
whether to or not, or perhaps not actually updating the values the
first time through the loop.  Neither seems optimal.  :-(





--
 - Stephen Fuld
(e-mail address disguised to prevent spam)

Date Sujet#  Auteur
17 Jun 24 * Concertlina II: Full Circle39John Savard
17 Jun 24 `* Re: Concertlina II: Full Circle38MitchAlsup1
17 Jun 24  `* Re: Concertlina II: Full Circle37John Savard
18 Jun 24   `* Re: Concertlina II: Full Circle36MitchAlsup1
18 Jun 24    +* Re: Concertlina II: Full Circle34John Savard
18 Jun 24    i+* Re: Concertlina II: Full Circle31John Savard
18 Jun 24    ii+* Re: Concertlina II: Full Circle9Thomas Koenig
18 Jun 24    iii`* Re: Concertlina II: Full Circle8John Savard
18 Jun 24    iii `* Re: Concertlina II: Full Circle7Thomas Koenig
18 Jun 24    iii  +* Re: Concertlina II: Full Circle2John Savard
19 Jun 24    iii  i`- Re: Concertlina II: Full Circle1John Savard
19 Jun 24    iii  `* Re: Concertlina II: Full Circle4Stephen Fuld
19 Jun 24    iii   +- Re: Concertlina II: Full Circle1MitchAlsup1
19 Jun 24    iii   +- Re: Concertlina II: Full Circle1MitchAlsup1
19 Jun 24    iii   `- Re: Concertlina II: Full Circle1MitchAlsup1
18 Jun 24    ii`* Re: Concertlina II: Full Circle21MitchAlsup1
18 Jun 24    ii `* Re: Concertlina II: Full Circle20John Savard
18 Jun 24    ii  +* Re: Concertlina II: Full Circle18MitchAlsup1
19 Jun 24    ii  i+* Re: Concertlina II: Full Circle16John Savard
19 Jun 24    ii  ii`* Re: Concertlina II: Full Circle15MitchAlsup1
19 Jun 24    ii  ii +* Re: Concertlina II: Full Circle8John Savard
20 Jun 24    ii  ii i`* Re: Concertlina II: Full Circle7John Savard
23 Jun 24    ii  ii i +* Re: Concertlina II: Full Circle2John Savard
25 Jun 24    ii  ii i i`- Re: Concertlina II: Full Circle1John Savard
23 Jun 24    ii  ii i `* Re: Concertlina II: Full Circle4MitchAlsup1
23 Jun 24    ii  ii i  `* Re: Concertlina II: Full Circle3John Savard
24 Jun 24    ii  ii i   `* Re: Concertlina II: Full Circle2MitchAlsup1
24 Jun 24    ii  ii i    `- Re: Concertlina II: Full Circle1John Savard
19 Jun 24    ii  ii `* Re: Concertlina II: Full Circle6Terje Mathisen
19 Jun 24    ii  ii  +* Re: Concertlina II: Full Circle2MitchAlsup1
19 Jun 24    ii  ii  i`- Re: Concertlina II: Full Circle1Terje Mathisen
19 Jun 24    ii  ii  `* Re: Concertlina II: Full Circle3Thomas Koenig
19 Jun 24    ii  ii   `* Re: Concertlina II: Full Circle2MitchAlsup1
19 Jun 24    ii  ii    `- Re: Concertlina II: Full Circle1Terje Mathisen
20 Jun 24    ii  i`- Re: Concertlina II: Full Circle1John Savard
19 Jun 24    ii  `- Re: Concertlina II: Full Circle1MitchAlsup1
18 Jun 24    i`* Re: Concertlina II: Full Circle2MitchAlsup1
18 Jun 24    i `- Re: Concertlina II: Full Circle1BGB-Alt
19 Jun 24    `- return for loop-back edges (Re: Concertlina II: Full Circle)1Anton Ertl

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