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Re: [RFC, ARM] Add pipeline description for Cortex-M4 -- try 2

From: Jie Zhang <jie at codesourcery dot com>
To: Ramana Radhakrishnan <ramana dot gcc at googlemail dot com>
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 14 Sep 2010 21:28:21 +0800
Subject: Re: [RFC, ARM] Add pipeline description for Cortex-M4 -- try 2
References: <4C8F3FF1.5020300@codesourcery.com> <AANLkTim65YpJn=t=3Xx65vjr8=KYwFav99ZgTSL9h65V@mail.gmail.com>

On 09/14/2010 09:17 PM, Ramana Radhakrishnan wrote:

On Tue, Sep 14, 2010 at 2:57 PM, Jie Zhang<jie@codesourcery.com> wrote:
Since there is no Cortex-M4F processor, I updated my patch accordingly.

Comments are welcome!
I've had a quick read through and an obvious query I had was whether
there was any difference in cycle counts on the M4 for 16 and 32 bit
multiplications / multiply and accumulate operations ?

According to the latest Cortex-M4 TRM, no. All multiply and MAC are 1 cycle.

--
Jie Zhang
CodeSourcery

References:
- [RFC, ARM] Add pipeline description for Cortex-M4 -- try 2
  - From: Jie Zhang
- Re: [RFC, ARM] Add pipeline description for Cortex-M4 -- try 2
  - From: Ramana Radhakrishnan

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