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Re: [PATCH] Fix mfcr for POWER targets other than POWER4
- From: Alan Modra <amodra at bigpond dot net dot au>
- To: Troy Rollo <binutils at troy dot rollo dot name>
- Cc: binutils at sources dot redhat dot com
- Date: Mon, 6 Nov 2006 09:40:36 +1030
- Subject: Re: [PATCH] Fix mfcr for POWER targets other than POWER4
- References: <200611031827.03143.binutils@troy.rollo.name>
On Fri, Nov 03, 2006 at 06:27:02PM +1100, Troy Rollo wrote:
> The patch at <http://sources.redhat.com/ml/binutils/2003-07/msg00094.html>
> introduced an alternative (faster) mfcr instruction for POWER4 targets,
> however the flags were changed on the old instruction so that it was no
> longer available when targeting POWER architectures other than POWER4.
Eh? The old single operand is still available. What makes you think
otherwise? Please write a little testcase and "as" invocation to show
what you mean.
> You can see some of the problems this has caused by googling for "Unrecognized
> opcode mfcr".
All I see is people using the wrong assembler, and cases where the new
insn wasn't available.
--
Alan Modra
IBM OzLabs - Linux Technology Centre