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[binutils-gdb] S12Z opcodes: Fix bug disassembling certain shift instructions.

*** TEST RESULTS FOR COMMIT 27f42a4ddb28514fde3d01083120674fc8c0c107 ***

Author: John Darrington <john@darrington.wattle.id.au>
Branch: master
Commit: 27f42a4ddb28514fde3d01083120674fc8c0c107

S12Z opcodes: Fix bug disassembling certain shift instructions.

Shift and rotate instructions when the number of bit positions
was an immediate value greater than 1 were incorrectly disassembled.
This change fixes that problem and extends the test to check for
it.

gas/ChangeLog:

  testsuite/gas/s12z/shift.s: Add new test case.
  testsuite/gas/s12z/shift.d: Add expected result.

opcodes/ChangeLog:

  s12z-dis.c (print_insn_shift) [SB_REG_REG_N]: Enter special case
  if the postbyte matches the appropriate pattern.
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