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From: Randy Hudson <ime@netcom.com>
Subject: Re: S/390 (was Market pressures for more reliable software)
Date: 30 Jun 2001 06:13:51 GMT
Date: 2001-06-30T06:13:51+00:00	[thread overview]
Message-ID: <9hjqmv$a0e$1@news.panix.com> (raw)
In-Reply-To: 3b3c7267$8$fuzhry$mr2ice@va.news.verio.net

[ posted and emailed ]

In article <3b3c7267$8$fuzhry$mr2ice@va.news.verio.net>,
 Shmuel (Seymour J.) Metz <spamtrap@library.lspace.org.invalid> wrote:

> ObBadCode. SVC 18 used to contain a sequence something like
> 
>          BALR  R3,0
>          BALR  R3,0
>          BALR  R3,0
>          USING *,R3
> 
> which contains two extraneous instructions.

Are you sure that wasn't:

SVC18    BALR  3,0
         BCTR  3,0
         BCTR  3,0
         USING SVC18,3

? That sequence sets the base register to the entry point, which used to be
considered good for debugging reasons.  

-- 
Randy Hudson  <ime@netcom.com>



  reply	other threads:[~2001-06-30  6:13 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-28 23:17 S/390 (was Market pressures for more reliable software) robin
2001-06-28 23:46 ` Roedy Green
2001-06-29  0:27   ` John Homes
2001-06-29  6:41     ` Randy Hudson
2001-06-29 19:25     ` hack
2001-06-29  0:52   ` Gary Labowitz
2001-06-29  8:21   ` Clem Clarke
2001-06-29 12:20   ` Shmuel (Seymour J.) Metz
2001-06-29 12:19 ` Shmuel (Seymour J.) Metz
2001-06-30  6:13   ` Randy Hudson [this message]
2001-07-02  0:18     ` Shmuel (Seymour J.) Metz
  -- strict thread matches above, loose matches on Subject: below --
2001-06-28 11:44 robin
2001-06-28 13:04 ` Gary Labowitz
2001-06-28 21:49 ` Roedy Green
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