This feature delivers optimized intrinsics using AVX2 instructions on x86_64 platforms for the P256 Elliptic Curve field operations in the SunEC provider. This optimization is enabled by default on supporting x86_64 platforms and when the AVX512 intrinsic cannot be used. It may be disabled by providing the `-XX:+UnlockDiagnosticVMOptions -XX:-UseIntPolyIntrinsics` command-line options.