From: Charles Forsyth <charles.forsyth@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Go and 21-bit runes (and a bit of Go status)
Date: Tue, 3 Dec 2013 11:14:44 +0000 [thread overview]
Message-ID: <CAOw7k5iZNy0o9NiPBwBFJ=LhfW=ngQPHsrGbLzoEov_ntZf=xw@mail.gmail.com> (raw)
In-Reply-To: <5b4d94141226d62a37865d39633f9f61@proxima.alt.za>
[-- Attachment #1: Type: text/plain, Size: 888 bytes --]
On 3 December 2013 10:08, <lucio@proxima.alt.za> wrote:
> I seem to remember
> Charles suggesting that it is difficult to do. And as it caught a
> rather embarrassing case of sloppy programming
>
It's not sloppy programming, but an underlying assumption about RISC
machines in the (then) future
having a respectable number of (truly) general-purpose registers, and the
x86
does not. The S-U numbers guide register allocation, but there is no
spilling code,
except for nested function calls, and a few special cases that don't use
the S-U numbers.
Given that the out of fixed registers diagnostic occurs rarely in the
normal source,
and the S-U numbers might or might not be strictly accurate, the potential
disadvantage
of introducing inefficiency in existing compiled code by spill code
misguided by inaccurate
estimates made it seem not worthwhile at the time.
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next prev parent reply other threads:[~2013-12-03 11:14 UTC|newest]
Thread overview: 125+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-02 10:53 lucio
2013-06-02 14:10 ` erik quanstrom
2013-06-02 15:24 ` lucio
2013-06-03 4:20 ` erik quanstrom
2013-06-03 5:38 ` lucio
2013-06-03 13:28 ` erik quanstrom
2013-06-03 16:34 ` lucio
2013-06-03 16:46 ` erik quanstrom
2013-06-03 17:04 ` lucio
2013-06-03 17:07 ` erik quanstrom
2013-06-03 17:33 ` Bakul Shah
2013-06-03 17:38 ` Charles Forsyth
2013-06-03 5:48 ` [9fans] More Go status lucio
2013-06-03 17:53 ` [9fans] SSE in a note handler Steve Simon
2013-06-02 15:01 ` [9fans] Go and 21-bit runes (and a bit of Go status) cinap_lenrek
2013-06-02 15:22 ` lucio
2013-06-02 15:38 ` cinap_lenrek
2013-06-02 15:54 ` lucio
2013-06-02 15:59 ` Kurt H Maier
2013-06-02 16:08 ` lucio
2013-06-02 19:37 ` Anthony Martin
2013-12-02 2:10 ` Skip Tavakkolian
2013-12-02 8:22 ` Anthony Martin
2013-12-02 14:33 ` erik quanstrom
2013-12-02 14:59 ` lucio
2013-12-02 15:22 ` Kurt H Maier
2013-12-02 17:19 ` lucio
2013-12-02 18:39 ` Kurt H Maier
2013-12-02 20:09 ` Skip Tavakkolian
2013-12-02 20:11 ` erik quanstrom
2013-12-02 20:22 ` Skip Tavakkolian
2013-12-02 20:24 ` David du Colombier
2013-12-02 20:38 ` erik quanstrom
2013-12-02 20:44 ` Bakul Shah
2013-12-02 20:45 ` erik quanstrom
2013-12-02 20:59 ` Bakul Shah
2013-12-02 21:03 ` erik quanstrom
2013-12-02 23:35 ` Bakul Shah
2013-12-03 0:11 ` erik quanstrom
2013-12-02 20:45 ` David du Colombier
2013-12-02 21:06 ` Skip Tavakkolian
2013-12-02 21:45 ` Jeff Sickel
2013-12-02 21:47 ` erik quanstrom
2013-12-02 21:51 ` erik quanstrom
2013-12-02 23:26 ` Skip Tavakkolian
2013-12-02 23:43 ` Steve Simon
2013-12-03 0:16 ` Anthony Martin
2013-12-03 2:55 ` erik quanstrom
2013-12-03 0:12 ` erik quanstrom
2013-12-03 0:21 ` Anthony Martin
2013-12-03 0:49 ` Aram Hăvărneanu
2013-12-03 0:52 ` erik quanstrom
2013-12-03 1:01 ` Anthony Martin
2013-12-03 1:06 ` Jeremy Jackins
2013-12-03 1:34 ` Jeff Sickel
2013-12-03 7:43 ` lucio
2013-12-03 7:33 ` lucio
2013-12-03 7:29 ` lucio
2013-12-03 15:20 ` erik quanstrom
2013-12-03 7:31 ` lucio
2013-12-03 8:14 ` Jeff Sickel
2013-12-03 9:16 ` lucio
2013-12-03 9:21 ` lucio
2013-12-03 14:51 ` erik quanstrom
2013-12-03 9:46 ` Charles Forsyth
2013-12-03 10:04 ` lucio
2013-12-03 11:39 ` Aram Hăvărneanu
2013-12-03 14:42 ` erik quanstrom
2013-12-03 14:51 ` Charles Forsyth
2013-12-03 15:54 ` Jeff Sickel
2013-12-03 16:04 ` lucio
2013-12-03 16:47 ` Charles Forsyth
2013-12-03 17:44 ` Skip Tavakkolian
2013-12-03 23:12 ` john francis lee
2013-12-04 0:13 ` sl
2013-12-04 4:25 ` lucio
2013-12-04 4:35 ` erik quanstrom
2013-12-04 6:19 ` lucio
2013-12-04 7:04 ` [9fans] Go port [was Re: Go and 21-bit runes (and a bit of Go status)] Jeff Sickel
2013-12-04 7:20 ` [9fans] Go port [was Re: Go and 21-bit runes (and a bit of Go lucio
2013-12-04 7:52 ` Jeff Sickel
2013-12-04 15:11 ` lucio
2013-12-04 4:37 ` [9fans] Go and 21-bit runes (and a bit of Go status) Jens Staal
2013-12-04 4:46 ` erik quanstrom
2013-12-03 7:10 ` lucio
2013-12-03 7:23 ` Skip Tavakkolian
2013-12-03 7:37 ` lucio
2013-12-03 15:04 ` erik quanstrom
2013-12-03 9:48 ` Richard Miller
2013-12-03 10:08 ` lucio
2013-12-03 11:14 ` Charles Forsyth [this message]
2013-12-03 11:24 ` lucio
2013-12-03 6:53 ` lucio
2013-12-03 4:49 ` lucio
2013-12-03 8:02 ` Kurt H Maier
2013-12-03 9:12 ` lucio
2013-12-02 15:50 ` erik quanstrom
2013-12-02 17:23 ` lucio
2013-12-02 18:35 ` erik quanstrom
2013-12-03 4:35 ` lucio
2013-12-02 22:52 ` Anthony Martin
2013-12-03 6:20 ` andrey mirtchovski
2013-12-02 16:10 ` Skip Tavakkolian
2013-12-02 17:25 ` lucio
2013-12-02 19:13 ` Skip Tavakkolian
2013-12-02 19:34 ` erik quanstrom
2013-12-03 6:34 ` lucio
2013-12-03 5:02 ` lucio
2013-12-02 17:31 ` Jeff Sickel
2013-12-02 17:52 ` lucio
2013-12-02 18:33 ` erik quanstrom
2013-12-02 19:16 ` Skip Tavakkolian
2013-12-02 19:26 ` erik quanstrom
2013-12-02 19:33 ` Skip Tavakkolian
2013-12-02 19:31 ` Christopher Nielsen
2013-12-02 20:17 ` David du Colombier
2013-12-02 19:37 ` Bakul Shah
2013-12-02 19:57 ` Skip Tavakkolian
2013-12-03 6:47 ` lucio
2013-12-03 6:45 ` lucio
2013-12-03 4:32 ` lucio
2013-12-03 17:22 erik quanstrom
2013-12-03 17:37 ` Bence Fábián
2013-12-03 17:59 ` erik quanstrom
2013-12-04 5:48 ` lucio
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