CPSR changes to ARM binutils in the mainline...

[Scott Bambrough]

Nick,

Hi Nick.  I backported the changes you made to to support the new style MSR
field masks (cpsr_c et al) to the 2.10 branch.  The first thing that happened is
the Linux kernel will not compile.  It seems the kernel uses `msr CPSR_c, #I_BIT
| MODE_SVC` all over the place.  The branch accepts this a legal instruction,
while the mainline generates an error.

The mainline is correct.  The ARM Architecture Reference states in note 1 that
the immediate form can only be used to set the flag bits.  The results are
unpredictable with the other fields, although it seems to work.  However, I
think your patch should go into the branch for consistency.  I don't think it is
a good idea for the branch and the mainline to have different behaviour here,
particularly when we are just about to release.

What do you think?

Scott

-- 
Scott Bambrough - Software Engineer
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