Arm released an update (2019Q1.1) of the Vector Function ABI specifications for AArch64 that uses the `declare variant` directive from OpenMP 5.0 to support user defined vector functions. The mechanism is introduced in chapter 4, and it is in beta release status to allow feedback from the open source community. The mechanism also allows declaring SVE and AdvSIMD vector functions independently which is not possible with the current OpenMP and attribute(simd) support in gcc. Feedback needs to be provided at arm.eabi (at) arm.com by end of June 16th (AOE).
https://developer.arm.com/tools-and-software/server-and-hpc/arm-architecture-tools/arm-compiler-for-hpc/vector-function-abi Thanks.
