Sparc

    pub const Sparc = packed struct(u32) {
        mm: MemoryModel,
        _reserved1: u6 = 0,
        ext: Extensions,
        _reserved2: u8 = 0,

        pub const MemoryModel = enum(u2) {
            /// Total Store Ordering
            tso = 0,
            /// Partial Store Ordering
            pso = 1,
            /// Relaxed Memory Ordering
            rmo = 2,
        };

        pub const Extensions = packed struct(u16) {
            /// Uses SPARC v8 ABI (w/ 32-bit pointers) on SPARC v9. Also known as v8+.
            @"32plus": bool,
            /// Uses Sun UltraSPARC extensions.
            sun_us1: bool,
            /// Uses HaL R1 extensions.
            hal_r1: bool,
            /// Uses Sun UltraSPARC III extensions.
            sun_us3: bool,
            _reserved: u11 = 0,
            /// Uses little endian data (SPARC v9+).
            le_data: bool,
        };
    }