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Date: Sat, 31 Jul 2010 17:21:00 -0000
From: Michael Matz <matz@suse.de>
To: Sebastian Pop <sebpop@gmail.com>
Cc: Richard Guenther <richard.guenther@gmail.com>,	gcc-patches@gcc.gnu.org
Subject: Re: [PATCH 0/2] Loop distribution for memset zero
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Hi,

On Sat, 31 Jul 2010, Sebastian Pop wrote:

> > as we probably want to add memcpy or array sin/cos operations as well 
> > here.
> 
> I can imagine the memcpy pattern, but could you please provide an 
> example for sin/cos patterns?

Some math libraries (the one from AMD at least for instance) provide not 
only vectorized intrinsics for a fixed vector size (e.g. 4 float 
elements), but also for a generic arbitrarily sized array.  
For instance:

  void vrsa_expf(int n, float *src, float *dest);

is equivalent to:

  for (i = 0; i < n; i++)
    dest[i] = expf (src[i]);


Ciao,
Michael.