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Re: MS/CW-style inline assembly for GCC

From: Stan Shebs <shebs at apple dot com>
To: tm_gccmail at kloo dot net
Cc: Daniel Jacobowitz <drow at false dot org>, Mark Mitchell <mark at codesourcery dot com>, Mike Stump <mrs at apple dot com>, gcc at gcc dot gnu dot org
Date: Mon, 10 May 2004 19:07:51 -0700
Subject: Re: MS/CW-style inline assembly for GCC
References: <Pine.LNX.4.21.0405101725230.11071-100000@mail.kloo.net>

tm_gccmail@kloo.net wrote:

On Fri, 7 May 2004, Daniel Jacobowitz wrote:

[By the way, I'm surprised to hear that CodeWarrior will schedule
outside code interleaved with an asm block.  That seems like a really
bad idea!]

It is a really bad idea.

If you're doing driver-level work, then you need barriers to ensure writes
occur in the correct order and are flushed out properly. If you schedule
other code in between, this may not work properly.

Toshi

Just to keep things in perspective, it doesn't seem that CW does
much rearrangement, in fact I don't remember ever seeing it do that.
One could imagine Metrowerks taking a conservative approach and
treating all but the most innocuous instructions as barriers.

Stan

References:
- Re: MS/CW-style inline assembly for GCC
  - From: tm_gccmail

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