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From: cinap_lenrek@felloff.net
To: 9fans@9fans.net
Subject: Re: [9fans] store NaN() to memory traps on 386 (387)
Date: Mon,  2 May 2016 18:36:25 +0200	[thread overview]
Message-ID: <c72539ce82f61f6d7a984ec22ffd1b91@felloff.net> (raw)
In-Reply-To: <83332f423f24f1aa53cac38487b96d5d@mule>

my initial analysis was wrong. i got fooled by the asynchronous nature
of the exception delivery. the trap already happend on the FLD instruction
when we try to load the SNaN from memory.

what sucks is that passing "nan" to strtod() will result in a program
crash with the default fcr instead of rejecting the string. so everyone
is forced to filter the inputs to strtod() to avoid the crash, or change
the fcr and then deal with the nan's and infs.

--
cinap



  reply	other threads:[~2016-05-02 16:36 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 [this message]
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
2016-05-03  1:13               ` cinap_lenrek
2016-05-02 19:49           ` cinap_lenrek

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