From: Richard Henderson <richard.henderson@linaro.org>
To: morrell@alumni.ucsd.edu, qemu-devel@nongnu.org
Subject: Re: Denormal input handling
Date: Wed, 26 May 2021 12:23:01 -0700 [thread overview]
Message-ID: <4bc4444e-782a-311c-719d-091a04e20387@linaro.org> (raw)
In-Reply-To: <746277332.296230.1622055775751@mail.yahoo.com>
On 5/26/21 12:02 PM, Michael Morrell via wrote:
> I think the behavior should be for denormal inputs that if "flush_inputs_to_zero" is true, then set the value to zero (without setting the "input denormal" flag); and if "flush_inputs_to_zero" is false, set the "input denormal" flag and normalize the input.
>
> This matches what x86 does (I'm not sure about other architectures).
It is not.
Intel Architectures SDM Vol 1, Section 11.5.2.2:
The denormal operand exception is not affected by
flush-to-zero mode.
r~
next prev parent reply other threads:[~2021-05-26 19:24 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <746277332.296230.1622055775751.ref@mail.yahoo.com>
2021-05-26 19:02 ` Denormal input handling Michael Morrell via
2021-05-26 19:23 ` Richard Henderson [this message]
2021-05-26 19:28 ` Richard Henderson
2021-05-26 19:52 ` Michael Morrell via
2021-05-26 20:15 ` Richard Henderson
2021-05-26 17:37 Michael Morrell
2021-05-26 20:18 ` Peter Maydell
2021-05-26 21:59 ` Michael Morrell
2021-05-27 1:14 ` Richard Henderson
2021-06-21 23:13 ` Michael Morrell
2021-06-21 23:30 ` Richard Henderson
2021-06-21 23:39 ` Michael Morrell
2021-06-22 0:57 ` Michael Morrell
2021-06-22 18:50 ` Michael Morrell
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