Support Intel SHA512

Support Intel SHA512

gas/ChangeLog:

	* NEWS: Support Intel SHA512.
	* config/tc-i386.c: Add sha512.
	* doc/c-i386.texi: Document .sha512.
	* testsuite/gas/i386/disassem.d: Add SHA512 tests.
	* testsuite/gas/i386/disassem.s: Ditto.
	* testsuite/gas/i386/i386.exp: Run SHA512 tests.
	* testsuite/gas/i386/x86-64.exp: Ditto.
	* testsuite/gas/i386/sha512-intel.d: New test.
	* testsuite/gas/i386/sha512-inval.l: Ditto.
	* testsuite/gas/i386/sha512-inval.s: Ditto.
	* testsuite/gas/i386/sha512.d: Ditto.
	* testsuite/gas/i386/sha512.s: Ditto.
	* testsuite/gas/i386/x86-64-sha512-intel.d: Ditto.
	* testsuite/gas/i386/x86-64-sha512-inval.l: Ditto.
	* testsuite/gas/i386/x86-64-sha512-inval.s: Ditto.
	* testsuite/gas/i386/x86-64-sha512.d: Ditto.
	* testsuite/gas/i386/x86-64-sha512.s: Ditto.

opcodes/ChangeLog:

	* i386-dis.c (Rxmmq): New.
	(Rymm): Ditto.
	(PREFIX_VEX_0F38CB): Ditto.
	(PREFIX_VEX_0F38CC): Ditto.
	(PREFIX_VEX_0F38CD): Ditto.
	(VEX_LEN_0F38CB_P_3_W_0): Ditto.
	(VEX_LEN_0F38CC_P_3_W_0): Ditto.
	(VEX_LEN_0F38CD_P_3_W_0): Ditto.
	(VEX_W_0F38CB_P_3): Ditto.
	(VEX_W_0F38CC_P_3): Ditto.
	(VEX_W_0F38CD_P_3): Ditto.
	(prefix_table): Add PREFIX_VEX_0F38CB, PREFIX_VEX_0F38CC,
	PREFIX_VEX_0F38CD.
	(vex_len_table): Add VEX_LEN_0F38CB_P_3_W_0,
	VEX_LEN_0F38CC_P_3_W_0, VEX_LEN_0F38CD_P_3_W_0.
	(vex_w_table): Add VEX_W_0F38CB_P_3, VEX_W_0F38CC_P_3, VEX_W_0F38CD_P_3.
	* i386-gen.c (isa_dependencies): Add SHA512.
	(cpu_flags): Ditto.
	* i386-init.h: Regenerated.
	* i386-mnem.h: Ditto.
	* i386-opc.h (CpuSHA512): New.
	(i386_cpu_flags): Add cpusha512.
	* i386-opc.tbl: Add SHA512 instructions.
	* i386-tbl.h: Regenerated.