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Re: Sandy Bridge-specific double load ports optimization
- From: Martin Millnert <millnert at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Fri, 03 Feb 2012 14:33:05 +0100
- Subject: Re: Sandy Bridge-specific double load ports optimization
- References: <1328136795.6161.145.camel@davinci.millnert.se>
Clarification,
On Wed, 2012-02-01 at 23:53 +0100, Martin Millnert wrote:
> Hi gcc-help,
>
> I have a question regarding an optimization example for the Sandy Bridge
> march.
>
> In the Intel 64 and IA-32 Architectures Optimization Reference Manual
> [1] on page 183, sec 3.6.1.2, there is a piece about optimizing L1D
This should be 3.6.1.1, on p. 181. What I'm looking for is a way to
make GCC produce code that alternates register dependencies, such that
the double load ports of the architecture can be utilized, as in RHS of
example on page 3-32 (182).
Regards,
Martin