@item @code{fp16fml} @tab ARMv8.2-A @tab ARMv8.4-A or later
@tab Enable ARMv8.2 16-bit floating-point multiplication variant support.
This implies @code{fp16}.
+@item @code{sb} @tab ARMv8-A @tab ARMv8.5-A or later
+ @tab Enable the speculation barrier instruction sb.
@end multitable
@node AArch64 Syntax