[PATCH, ARM] Fix out-of-range immediate assembly errors on 64-bit hosts

[Julian Brown]

Hi,

This patch fixes some immediate-out-of-range errors for VBIC, VORR etc. 
on 64-bit hosts. On such hosts, the X_add_number field of expressions 
will be 64 bits wide. INT_MIN and INT_MAX are used to signify that any 
immediate may be accepted for parse_immediate: unfortunately on a 64-bit 
host, 0xff000000 for instance is then interpreted as a positive integer 
outside that range. I've just made passing INT_MIN/INT_MAX disable the 
check instead, though I'm not very fond of that solution.

Tested with cross to arm-none-eabi from x86_64-unknown-linux-gnu.

OK to apply?

Cheers,

Julian

ChangeLog (gas):

     * config/tc-arm.c (parse_immediate): Handle 64-bit X_add_number
     case.
     (parse_big_immediate): Likewise.
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