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From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] store NaN() to memory traps on 386 (387)
Date: Mon,  2 May 2016 16:23:28 -0700	[thread overview]
Message-ID: <e193798e9c0ed9fdf3e9f125af2a934e@lilly.quanstro.net> (raw)
In-Reply-To: <CAO41-mN45T3QTYkcUhbVsbsHW_njOupZE7RXPXTZscJEjp7BUg@mail.gmail.com>

On Mon May  2 12:30:03 PDT 2016, rymg19@gmail.com wrote:

> Not crash into a flaming ball of (very vague) fire?

the obvious loop with nan

	for(i in `{seq nan >[2=]}){echo $i}

prints nothing, as the body is never executed.

what would you have it do?

to cinap's point, either nan -> float doesn't trap, and there is no protection
against bad fp math, or it does trap, and one has protection against producing
inadvertant nans.

by the way, the same issue exists with sse.

- erik



  reply	other threads:[~2016-05-02 23:23 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-04-30 12:40 cinap_lenrek
2016-04-30 23:47 ` cinap_lenrek
2016-05-02 10:16 ` erik quanstrom
2016-05-02 16:36   ` cinap_lenrek
2016-05-02 16:45     ` erik quanstrom
2016-05-02 19:05       ` cinap_lenrek
2016-05-02 19:17         ` erik quanstrom
2016-05-02 19:27           ` Ryan Gonzalez
2016-05-02 23:23             ` erik quanstrom [this message]
2016-05-03  1:13               ` cinap_lenrek
2016-05-02 19:49           ` cinap_lenrek

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