[Patch, AArch64] Extend the range of system registers that can be specified using the S3_<op1>_<Cn>_<Cm>_<op2> form

[Yufeng Zhang]

Hi,

This patch changes GAS to allow more system registers to be specified 
using S3_<op1>_<Cn>_<Cm>_<op2>.  This relaxation enables the assembler 
to accept more system registers without the need to add/maintain more 
tables of system registers with specific names.

The disassembler has already been able to display these registers in the 
same form.

OK for the trunk?

Thanks,
Yufeng

gas/

2013-02-27  Yufeng Zhang  <yufeng.zhang@arm.com>

	* config/tc-aarch64.c (parse_sys_reg): Allow the full range of CRn
	for system registers.

gas/testsuite/

2013-02-27  Yufeng Zhang  <yufeng.zhang@arm.com>

	* gas/aarch64/illegal.l: Delete the error message for
	msr S3_1_C13_C15_1,x7.
	* gas/aarch64/sysreg.s: Add new tests.
	* gas/aarch64/sysreg.d: Update.
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