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GCC 16 Will No Longer Treat Function Multi-Versioning As Experimental On ARM64
Function Multi-Versioning (FMV) is the compiler feature that allows developers to specify multiple versions of the same function that can be used for optimizing execution for specific target features
For example, FMV can allow optimized functions to be called if the CPU supports AVX, AVX-512, SSE4.2, or other differing ISA capabilities. With the GCC 16 compiler release, AArch64/ARM64 now considers its FMV support to be stable and complete. Arm engineers had been working on GCC FMV support the past 3+ years.
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