Sujet : Re: is Vax adressing sane today
De : mitchalsup (at) *nospam* aol.com (MitchAlsup1)
Groupes : comp.archDate : 08. Sep 2024, 01:52:25
Autres entêtes
Organisation : Rocksolid Light
Message-ID : <8c40234e61f022a506f56f7422cf27c5@www.novabbs.org>
References : 1 2 3
User-Agent : Rocksolid Light
On Fri, 6 Sep 2024 6:05:35 +0000, Anton Ertl wrote:
jgd@cix.co.uk (John Dallman) writes:
Memory-to-memory instructions, in general, are hard to get to run fast
with today's processors and memory, simply because memory access times
are long enough for many register-to-register instructions to execute.
>
Given modern OoO technology, even VAX can fly. It does not matter
whether, say,
>
*a++ = *b++ + *c++;
>
is encoded as 1 VAX instruction, or as 4 ARM A64 instructions, or as 7
RISC-V instructions, what goes on inside the OoO engine is pretty
similar in all cases, and so is the performance.
When I faced a similar set of desires, I had my movememory MM
instruction do::
for( control_register = 0,
control_register < Rs3,
control+register+=size )
rd[control_register] = rs1[control_register];
where size is determined by alignment, memory type (from PTE).
Thus, when a page fault or interrupt cuts the instruction in
the middle I don't have to recover any of the registers.
This also allows the instruction to be thrown over to the
Memory Function Unit and be performed in parallel with other
calculation instructions.
Getting back to the originating:: It is faster these days to
write::
a[i] = b[i] + c[i];i++;
than the pre/post increment/decrement style of PDP-11.
Date | Sujet | # | | Auteur |
5 Sep 24 | is Vax adressing sane today | 336 | | Brett |
5 Sep 24 | Re: is Vax adressing sane today | 324 | | John Dallman |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 322 | | Anton Ertl |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 5 | | MitchAlsup1 |
7 Sep 24 | Re: is Vax adressing sane today | 4 | | Anton Ertl |
7 Sep 24 | Re: is Vax adressing sane today | 3 | | Anton Ertl |
7 Sep 24 | Re: is Vax addressing sane today | 2 | | John Dallman |
7 Sep 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
7 Sep 24 | Re: is Vax adressing sane today | 313 | | John Levine |
8 Sep 24 | Re: is Vax adressing sane today | 312 | | Anton Ertl |
8 Sep 24 | Re: is Vax adressing sane today | 304 | | MitchAlsup1 |
8 Sep 24 | Re: is Vax addressing sane today | 303 | | Lawrence D'Oliveiro |
9 Sep 24 | Re: is Vax addressing sane today | 231 | | MitchAlsup1 |
9 Sep 24 | Re: is Vax addressing sane today | 230 | | Brett |
9 Sep 24 | Re: is Vax addressing sane today | 7 | | MitchAlsup1 |
10 Sep 24 | Re: is Vax addressing sane today | 6 | | Niklas Holsti |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
25 Sep 24 | Re: is Vax addressing sane today | 4 | | Stephen Fuld |
25 Sep 24 | Re: is Vax addressing sane today | 3 | | Michael S |
25 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
10 Sep 24 | Re: is Vax addressing sane today | 222 | | Anton Ertl |
10 Sep 24 | Re: is Vax addressing sane today | 4 | | Michael S |
10 Sep 24 | Re: is Vax addressing sane today | 3 | | Anton Ertl |
10 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | Michael S |
11 Sep 24 | Re: is Vax addressing sane today | 7 | | Lawrence D'Oliveiro |
11 Sep 24 | Re: is Vax addressing sane today | 6 | | Michael S |
11 Sep 24 | Re: is Vax addressing sane today | 5 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | Thomas Koenig |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | David Schultz |
13 Sep 24 | Re: is Vax addressing sane today | 1 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 5 | | John Levine |
11 Sep 24 | Re: is Vax addressing sane today | 4 | | Thomas Koenig |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | jseigh |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | John Levine |
20 Sep 24 | Re: is Vax addressing sane today | 205 | | Kent Dickey |
21 Sep 24 | Re: is Vax addressing sane today | 4 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 3 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 4 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 3 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 30 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 18 | | John Levine |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Michael S |
22 Sep 24 | Re: except what, is Vax addressing sane today | 8 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: except what, is Vax addressing sane today | 7 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 6 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | John Dallman |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 5 | | Terje Mathisen |
24 Sep 24 | Re: except what, is Vax addressing sane today | 4 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: except what, is Vax addressing sane today | 3 | | Chris M. Thomasson |
24 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | MitchAlsup1 |
16 Oct 24 | Re: except what, is Vax addressing sane today | 1 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 3 | | Lars Poulsen |
24 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Michael S |
22 Sep 24 | Re: is Vax addressing sane today | 7 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 6 | | MitchAlsup1 |
22 Sep 24 | Re: is Vax addressing sane today | 3 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
22 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | Stefan Monnier |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
12 Oct 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
22 Sep 24 | Re: is Vax addressing sane today | 4 | | Thomas Koenig |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Kent Dickey |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Bill Findlay |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Thomas Koenig |
23 Sep 24 | Re: is Vax addressing sane today | 1 | | Stefan Monnier |
23 Sep 24 | Re: is Vax addressing sane today | 161 | | Kent Dickey |
24 Sep 24 | Re: is Vax addressing sane today | 11 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: is Vax addressing sane today | 9 | | Terje Mathisen |
24 Sep 24 | Re: is Vax addressing sane today | 4 | | Michael S |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Terje Mathisen |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | Michael S |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Stephen Fuld |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | Stephen Fuld |
12 Oct 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Terje Mathisen |
29 Sep 24 | Re: is Vax addressing sane today | 1 | | Michael S |
7 Oct 24 | Re: is Vax addressing sane today | 1 | | Kent Dickey |
25 Sep 24 | Re: is Vax addressing sane today | 133 | | MitchAlsup1 |
26 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
28 Sep 24 | Re: is Vax addressing sane today | 131 | | Lawrence D'Oliveiro |
28 Sep 24 | Re: is Vax addressing sane today | 3 | | George Neuner |
7 Oct 24 | Re: is Vax addressing sane today | 8 | | Kent Dickey |
12 Oct 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
9 Sep 24 | Re: is Vax addressing sane today | 71 | | Anton Ertl |
8 Sep 24 | Re: is Vax adressing sane today | 7 | | Brett |
8 Sep 24 | Re: is Vax adressing sane today | 2 | | MitchAlsup1 |
6 Sep 24 | Re: is Vax adressing sane today | 2 | | MitchAlsup1 |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 8 | | Anton Ertl |