Re: C arithmetic, was Software proofs, was Are there different

Hans-Peter Diettrich <DrDiettrich1@netscape.net>
Tue, 7 Feb 2023 14:31:26 +0100

          From comp.compilers
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From: Hans-Peter Diettrich <DrDiettrich1@netscape.net>
Newsgroups: comp.compilers
Date: Tue, 7 Feb 2023 14:31:26 +0100
Organization: Compilers Central
References: 23-01-092 23-02-003 23-02-019 23-02-025 23-02-026
Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="13477"; mail-complaints-to="abuse@iecc.com"
Keywords: arithmetic, comment
Posted-Date: 07 Feb 2023 21:30:36 EST
In-Reply-To: 23-02-026
Content-Language: de-DE

On 2/6/23 10:26 PM, gah4 wrote:


> Too bad for those CDC computers, and Unisys computers.
> Last I know of sign-magnitude is the IBM 7090 and 7094.


AFAIK use IEEE-754 floating point numbers still sign-magnitude
representation.
Then the same representation of integral numbers may have advantages in
computations.


DoDi
[I presume the sign-magnitude is to enable the hidden bit trick,
which doesn't apply in unscaled integers. -John]

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