Sujet : Re: Stealing a Great Idea from the 6600
De : anton (at) *nospam* mips.complang.tuwien.ac.at (Anton Ertl)
Groupes : comp.archDate : 26. Apr 2024, 16:34:57
Autres entêtes
Organisation : Institut fuer Computersprachen, Technische Universitaet Wien
Message-ID : <2024Apr26.173457@mips.complang.tuwien.ac.at>
References : 1 2 3 4 5 6 7 8 9 10
User-Agent : xrn 10.11
mitchalsup@aol.com (MitchAlsup1) writes:
What we need is ~16-bit displacements where 82½%-91¼% are positive.
What are these funny numbers about?
Do you mean that you want number ranges like -11468..54067 (82.5%
positive) or -5734..59801 (91.25% positive)? Which one of those? And
why not, say -8192..57343 (87.5% positive)?
How does one use a frame pointer without negative displacements ??
You let it point to the lowest address you want to access. That moves
the problem to unwinding frame pointer chains where the unwinder does
not know the frame-specific difference between the frame pointer and
the pointer of the next frame.
An alternative is to have a frame-independent difference that leaves
enough room that, say 90% (or 99%, or whatever) of the frames don't
need negative offsets from that frame.
Likewise, if you have signed displacements, and are unhappy about the
skewed usage, you can let the frame pointer point at an offset from
the pointer to the next fram such that the usage is less skewed.
- anton
-- 'Anyone trying for "industrial quality" ISA should avoid undefined behavior.' Mitch Alsup, <c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>
Date | Sujet | # | | Auteur |
17 Apr 24 | Stealing a Great Idea from the 6600 | 128 | | John Savard |
18 Apr 24 | Re: Stealing a Great Idea from the 6600 | 125 | | MitchAlsup1 |
18 Apr 24 | Re: Stealing a Great Idea from the 6600 | 124 | | John Savard |
18 Apr 24 | Re: Stealing a Great Idea from the 6600 | 123 | | MitchAlsup1 |
19 Apr 24 | Re: Stealing a Great Idea from the 6600 | 122 | | John Savard |
19 Apr 24 | Re: Stealing a Great Idea from the 6600 | 121 | | John Savard |
19 Apr 24 | Re: Stealing a Great Idea from the 6600 | 120 | | MitchAlsup1 |
20 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | John Savard |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | John Savard |
20 Apr 24 | Re: Stealing a Great Idea from the 6600 | 117 | | John Savard |
20 Apr 24 | Re: Stealing a Great Idea from the 6600 | 116 | | John Savard |
20 Apr 24 | Re: Stealing a Great Idea from the 6600 | 115 | | MitchAlsup1 |
20 Apr 24 | Re: Stealing a Great Idea from the 6600 | 105 | | BGB |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 104 | | MitchAlsup1 |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 63 | | John Savard |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 15 | | John Savard |
25 Apr 24 | Re: Stealing a Great Idea from the 6600 | 14 | | Lawrence D'Oliveiro |
25 Apr 24 | Re: Stealing a Great Idea from the 6600 | 12 | | MitchAlsup1 |
25 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
30 Apr 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 10 | | John Levine |
3 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 9 | | Anton Ertl |
3 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 7 | | John Levine |
4 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 6 | | Thomas Koenig |
4 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 4 | | John Levine |
4 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 3 | | MitchAlsup1 |
5 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 2 | | Thomas Koenig |
5 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
28 Jul 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
3 May 24 | Re: a bit of history, Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
25 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | John Savard |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 47 | | MitchAlsup1 |
23 Apr 24 | Re: Stealing a Great Idea from the 6600 | 45 | | George Neuner |
23 Apr 24 | Re: Stealing a Great Idea from the 6600 | 44 | | MitchAlsup1 |
25 Apr 24 | Re: Stealing a Great Idea from the 6600 | 43 | | George Neuner |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 42 | | BGB |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 41 | | MitchAlsup1 |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | Anton Ertl |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 4 | | BGB |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | MitchAlsup1 |
27 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | BGB |
26 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
27 Apr 24 | Re: Stealing a Great Idea from the 6600 | 34 | | BGB |
27 Apr 24 | Re: Stealing a Great Idea from the 6600 | 33 | | MitchAlsup1 |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 32 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 31 | | MitchAlsup1 |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 30 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 24 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 23 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 22 | | Thomas Koenig |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 21 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 20 | | BGB |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | Thomas Koenig |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | BGB |
29 Jul 24 | Re: Stealing a Great Idea from the 6600 | 16 | | Lawrence D'Oliveiro |
29 Jul 24 | Re: Stealing a Great Idea from the 6600 | 6 | | BGB |
30 Jul 24 | Re: Stealing a Great Idea from the 6600 | 5 | | Lawrence D'Oliveiro |
30 Jul 24 | Re: Stealing a Great Idea from the 6600 | 4 | | BGB |
31 Jul 24 | Re: Stealing a Great Idea from the 6600 | 3 | | Lawrence D'Oliveiro |
31 Jul 24 | Re: Stealing a Great Idea from the 6600 | 2 | | BGB |
1 Aug 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
29 Jul 24 | Re: Stealing a Great Idea from the 6600 | 9 | | Terje Mathisen |
29 Jul 24 | Re: Stealing a Great Idea from the 6600 | 8 | | MitchAlsup1 |
30 Jul 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
30 Jul 24 | Re: Stealing a Great Idea from the 6600 | 4 | | Michael S |
30 Jul 24 | Re: Stealing a Great Idea from the 6600 | 3 | | MitchAlsup1 |
31 Jul 24 | Re: Stealing a Great Idea from the 6600 | 2 | | BGB |
1 Aug 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
1 Aug 24 | Re: Stealing a Great Idea from the 6600 | 2 | | Thomas Koenig |
1 Aug 24 | Re: Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
29 Jul 24 | Re: Stealing a Great Idea from the 6600 | 1 | | George Neuner |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 5 | | MitchAlsup1 |
28 Apr 24 | Re: Stealing a Great Idea from the 6600 | 4 | | BGB |
29 Apr 24 | Re: Stealing a Great Idea from the 6600 | 3 | | MitchAlsup1 |
29 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | BGB |
29 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Thomas Koenig |
29 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Tim Rentsch |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 40 | | BGB |
21 Apr 24 | Re: Stealing a Great Idea from the 6600 | 39 | | MitchAlsup1 |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 3 | | BGB |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | MitchAlsup1 |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | BGB |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | John Savard |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | BGB |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 33 | | Terje Mathisen |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 1 | | BGB |
13 Jun 24 | Re: Stealing a Great Idea from the 6600 | 31 | | Kent Dickey |
13 Jun 24 | Re: Stealing a Great Idea from the 6600 | 16 | | Stefan Monnier |
13 Jun 24 | Re: Stealing a Great Idea from the 6600 | 15 | | BGB |
13 Jun 24 | Re: Stealing a Great Idea from the 6600 | 14 | | MitchAlsup1 |
14 Jun 24 | Re: Stealing a Great Idea from the 6600 | 13 | | BGB |
18 Jun 24 | Re: Stealing a Great Idea from the 6600 | 12 | | MitchAlsup1 |
19 Jun 24 | Re: Stealing a Great Idea from the 6600 | 8 | | BGB |
19 Jun 24 | Re: Stealing a Great Idea from the 6600 | 7 | | MitchAlsup1 |
19 Jun 24 | Re: Stealing a Great Idea from the 6600 | 5 | | BGB |
19 Jun 24 | Re: Stealing a Great Idea from the 6600 | 4 | | MitchAlsup1 |
20 Jun 24 | Re: Stealing a Great Idea from the 6600 | 3 | | Thomas Koenig |
20 Jun 24 | Re: Stealing a Great Idea from the 6600 | 2 | | MitchAlsup1 |
21 Jun 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Thomas Koenig |
20 Jun 24 | Re: Stealing a Great Idea from the 6600 | 1 | | John Savard |
19 Jun 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Thomas Koenig |
20 Jun 24 | Re: Stealing a Great Idea from the 6600 | 1 | | MitchAlsup1 |
31 Jul 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Lawrence D'Oliveiro |
13 Jun 24 | Re: Stealing a Great Idea from the 6600 | 13 | | MitchAlsup1 |
14 Jun 24 | Re: Stealing a Great Idea from the 6600 | 1 | | Terje Mathisen |
22 Apr 24 | Re: Stealing a Great Idea from the 6600 | 9 | | John Savard |
18 Apr 24 | Re: Stealing a Great Idea from the 6600 | 2 | | Lawrence D'Oliveiro |