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Re: [PATCH] BZ #14649: Add multiarch FMA support to x86-64 libm
- From: Andreas Jaeger <aj at suse dot com>
- To: libc-alpha at sourceware dot org
- Date: Mon, 01 Oct 2012 19:56:22 +0200
- Subject: Re: [PATCH] BZ #14649: Add multiarch FMA support to x86-64 libm
- References: <20121001151458.GB14836@gmail.com>
On 10/01/2012 05:14 PM, H.J. Lu wrote:
Hi,
This patch adds multiarch FMA support to x86-64 libm. Tested on
FMA machine. OK for master?
What kind of performance benefits does it bring us? Are you sure that
all the functions you enhance are really using fma and thus benefit from
the change?
Btw. are there any processors that have both fma variants in hardware -
or is it at most one of them?
Andreas
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