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Re: Dealing with NOP instructions
- From: Jim Wilson <wilson at specifixinc dot com>
- To: Hsin-Hsien Wu <sinsen dot wu at msa dot hinet dot net>
- Cc: gcc at gcc dot gnu dot org
- Date: Wed, 30 Jun 2004 19:23:33 -0700
- Subject: Re: Dealing with NOP instructions
- References: <200406300735.PAA25077@msr57.hinet.net>
Hsin-Hsien Wu wrote:
> Does any one know about how gcc instruction scheduler deals with the
> nop operation?
> What would happen if there is a pipeline stall?
The scheduler doesn't inset nops when it finds a pipeline stall, if that
is the question you are asking. If you need this, you have to do it
manually in machine dependent reorg.
--
Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com