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ARC can use odd-even double register pairs in some selected instructions. Although the GNU assembler doesn't allow even-odd registers to be used, there may be cases when the disassembler is presented with such situation. This patch add a test and detects such cases. opcodes/ 2020-07-14 Claudiu Zissulescu <claziss@gmail.com> * arc-dis.c (print_insn_arc): Detect and emit a warning when a faulty double register pair is detected. binutils/ 2020-07-14 Claudiu Zissulescu <claziss@gmail.com> * testsuite/binutils-all/arc/double_regs.s: New test. * testsuite/binutils-all/arc/objdump.exp: Add the above test. Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>