This commit - https://github.com/openjdk/valhalla/commit/f03fb4e4ee4d59ed692d0c26ddce260511f544e7#diff-a799ce8da7f3062bb3699beb65aae504840c649942032e325c2a50f88a2869ad adds some initial support for FP16 scalar operations and adds backend support for fp16 add operation for X86.
The aim of this task is to add backend support for both scalar and vector FP16 add operation for aarch64.