From: Szabolcs Nagy <szabolcs.nagy@arm.com>
To: Stephen Smith <ischis2@cox.net>
Cc: gcc@gcc.gnu.org, binutils@sourceware.org
Subject: Re: Division by zero on A53 which does not raise an exception
Date: Tue, 29 Nov 2022 12:00:43 +0000 [thread overview]
Message-ID: <Y4X0a+MnpjXrIxkg@arm.com> (raw)
In-Reply-To: <4789825.31r3eYUQgx@thunderbird>
The 11/28/2022 21:37, Stephen Smith via Binutils wrote:
> I am working on a project which is using an A53 core. The core does not
> raise an exception if there is a division by zero (for either integer or
> floating point division).
floating-point division by zero signals the FE_DIVBYZERO exception.
you can test this via fetestexcept(FE_DIVBYZERO).
integer operations must not affect fenv status flags so integer
division by zero does not do that.
if you want to *trap* division by zero, there is no reliable way
to do that in c (this is not related to particular cpus though).
prev parent reply other threads:[~2022-11-29 12:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-29 4:37 Stephen Smith
2022-11-29 8:30 ` Richard Biener
2022-11-29 12:00 ` Szabolcs Nagy [this message]
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