sve
    
    [AArch64] Add a "compnum" feature
    
    This patch adds a named "compnum" feature for the ARMv8.3-A FCADD
    and FCMLA extensions.
    
    include/
    	* opcode/aarch64.h (AARCH64_FEATURE_COMPNUM): New macro.
    	(AARCH64_ARCH_V8_3): Include AARCH64_FEATURE_COMPNUM.
    
    opcodes/
    	* aarch64-tbl.h (aarch64_feature_simd_v8_3): Replace with...
    	(aarch64_feature_compnum): ...this.
    	(SIMD_V8_3): Replace with...
    	(COMPNUM): ...this.
    	(CNUM_INSN): New macro.
    	(aarch64_opcode_table): Use it for the complex number instructions.
    
    gas/
    	* doc/c-aarch64.texi: Add a "compnum" entry.
    	* config/tc-aarch64.c (aarch64_features): Likewise,
    	* testsuite/gas/aarch64/advsimd-compnum.s: New test.
    	* testsuite/gas/aarch64/advsimd-compnum.d: Likewise.