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Re: Patch: 32bit and 64bit Sparc Linux support in libffi

To: Bryce McKinlay <bryce at albatross dot co dot nz>
Subject: Re: Patch: 32bit and 64bit Sparc Linux support in libffi
From: Jeff Sturm <jsturm at sigma6 dot com>
Date: Mon, 17 Apr 2000 09:52:01 -0400
CC: green at cygnus dot com, java-patches at sourceware dot cygnus dot com, jakub at redhat dot com
Organization: AppNet
References: <200004170213.TAA07295@hoser.cygnus.com> <38FA7698.F805C989@albatross.co.nz> <38FA7FF4.FB52FB4D@sigma6.com> <38FAAA4E.391F51FC@albatross.co.nz>

Bryce McKinlay wrote:
> Yeah. I'm planning to try building it without the spinlocks to see if they
> are the source of GCTest failures on my SMP (x86) machine. Linuxthreads
> uses "LOCK, CMPXCHGL" while gc uses XCHG with no "LOCK". I'm wondering if
> this is actually SMP-safe?

XCHG implicitly locks the bus.  I remember that much from the Intel
docs.

-- 
Jeff Sturm
jsturm@sigma6.com

References:
- Patch: 32bit and 64bit Sparc Linux support in libffi
  - From: Anthony Green
- Re: Patch: 32bit and 64bit Sparc Linux support in libffi
  - From: Bryce McKinlay
- Re: Patch: 32bit and 64bit Sparc Linux support in libffi
  - From: Jeff Sturm
- Re: Patch: 32bit and 64bit Sparc Linux support in libffi
  - From: Bryce McKinlay

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