From: James Cloos <cloos@jhcloos.com>
To: alpine-aports@lists.alpinelinux.org
Cc: Breno Leitao <brenohl@br.ibm.com>,  Timo Teras <timo.teras@iki.fi>
Subject: Re: [alpine-aports] [PATCH] Add support for ppc64le
In-Reply-To: <68f63acc-b6ad-5370-55a8-a55ea4e8b479@br.ibm.com> (Breno Leitao's
	message of "Fri, 20 Jan 2017 11:30:56 -0200")
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	<68f63acc-b6ad-5370-55a8-a55ea4e8b479@br.ibm.com>
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Date: Fri, 20 Jan 2017 14:35:16 -0500
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Newer ppcle hardware supports ieee 128 bit float now.  IBM decided to
switch from double-double to proper 128 bit some time ago.

(They only had double-double initially because it was easy; they wrote
microcode to support it using the then-current processors' 64bit float
hardware.  Later processors added double-double hardware.)

Musl of course only supports ieee floats.

Alpine probably needs two ppcle versions; one for older double-double
hardware which sets long double to 64 bits, and another for newer
systems which sets long double to 128 bits.

I *think* all power8 systems support ieee 128.

-JimC
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James Cloos <cloos@jhcloos.com>         OpenPGP: 0x997A9F17ED7DAEA6



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