[PATCH/ARM] To emit warnings for unpredictable behaviour of LDRD/STRD in Thumb-2

[Sameera Deshpande]

Hi,

Please find attached the patch which emits warning for
unpredictable behaviour of LDRD/STRD instruction for Thumb-2.
A new testcase is added for the same.

gas/ChangeLog:
2011-12-07  Sameera Deshpande  <sameera.deshpande@arm.com>

        * config/tc-arm.c (do_t_ldstd): Warn for unpredictable cases.


gas/testsuite/Changelog:
2011-12-06  Sameera Deshpande  <sameera.deshpande@arm.com>

        * gas/arm/thumb2_ldstd_unpredictable.d: New testcase.
        * gas/arm/thumb2_ldstd_unpredictable.l: Likewise.
        * gas/arm/thumb2_ldstd_unpredictable.s: Likewise.
        * gas/testsuite/gas/arm/sp-pc-validations-bad-t.l: Update
testcase.
        * gas/testsuite/gas/arm/sp-pc-validations-bad-t.s: Likewise.

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