From: Rich Felker <dalias@libc.org>
To: musl@lists.openwall.com
Subject: Re: [PATCH] math: rewrite fma with mostly int arithmetics
Date: Tue, 29 Aug 2017 22:04:30 -0400 [thread overview]
Message-ID: <20170830020430.GC19925@brightrain.aerifal.cx> (raw)
In-Reply-To: <20170423223533.GS2082@port70.net>
On Mon, Apr 24, 2017 at 12:35:33AM +0200, Szabolcs Nagy wrote:
> /* one bit is lost when scaled, add another top bit to
> only round once at conversion if it is inexact */
> if (rhi << 53) {
> i = rhi>>1 | (rhi&1) | 1ull<<62;
> if (sign)
> i = -i;
> r = i;
> r = 2*r - c; /* remove top bit */
> volatile double uflow = DBL_MIN/FLT_MIN;
> uflow *= uflow;
> }
Is there any way to get rid of the volatile hack here?
Rich
prev parent reply other threads:[~2017-08-30 2:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-18 22:41 Szabolcs Nagy
2017-04-22 22:24 ` Rich Felker
2017-04-23 11:00 ` Szabolcs Nagy
2017-04-23 15:15 ` Rich Felker
2017-04-23 22:34 ` Szabolcs Nagy
2017-04-23 22:35 ` Szabolcs Nagy
2017-08-30 2:04 ` Rich Felker [this message]
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