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Message-ID: <20140911132253.GA5487@zx-spectrum>
Date: Thu, 11 Sep 2014 16:22:53 +0300
From: Sergey Dmitrouk <sdmitrouk@...esssoftek.com>
To: "musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: Re: [PATCH] Make musl math depend less on libgcc builtins
> now that you mention i got reports of spurious invalid
> exceptions for nan inputs on arm, but i don't have hardfloat
> arm toolchain
>
> if you have further info on this that would be helpful
>
> (from the arm docs it seems to me that vfp sqrt should work
> according to ieee so either that is wrong or our fenv
> exception test is not ok on arm)
Note that I'm performing tests in QEMU. vsqrt.f64 instruction returns
NAN for NAN input and doesn't raise any exceptions ($fpscr register is
unchanged). However I get INVALID exception after printing result with
musl implementation of printf(), glibc doesn't raise any exceptions in
printf(), but I'm not sure whether it's important, probably not.
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