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Re: newlib on powerpc-eabi with soft-float

From: Gunter Magin <magin at skil dot camelot dot de>
To: Joel Sherrill <joel dot sherrill at OARcorp dot com>
Cc: crossgcc at sources dot redhat dot com
Date: Thu, 2 May 2002 22:32:56 +0200
Subject: Re: newlib on powerpc-eabi with soft-float
References: <OF1E350B66.EEEEF7A6-ON80256BAC.0060BBC0@portsmouth.uk.ibm.com> <3CD16215.A827BC99@OARcorp.com>

On Thu, May 02, 2002 at 10:58:13AM -0500, Joel Sherrill wrote:
> > 
> > However, the target processor (MC8260) has no floating point unit 
> 
> Are you sure about that?  According to this:
> 
> http://e-www.motorola.com/brdata/PDFDB/docs/MPC8260TS.pdf

Yes, it claims that on the 1st page. But read on to 1.2.1 "G2 Core", 
1st sentence.

According to MPC8260UM/D Rev.0, there are some leftovers still available,
i.e. 32 FPRs, which can be accessed if MSR[FP] = 1 via FP load & store
instructions. "No arithmetic instructions are supported in
hardware". The FPRs may be used "for systems that require emulation of FP
instructions and for increasing data throughput".

gm
-- 
Gunter Magin                                          magin[AT]skil.camelot.de

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References:
- newlib on powerpc-eabi with soft-float
  - From: Christopher Jenkins
- Re: newlib on powerpc-eabi with soft-float
  - From: Joel Sherrill

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