finalize

    fn finalize(self: *ArmCpuinfoImpl, arch: Target.Cpu.Arch) ?Target.Cpu {
        if (self.core_no == 0) return null;

        const is_64bit = switch (arch) {
            .aarch64, .aarch64_be => true,
            else => false,
        };

        var known_models: [num_cores]?*const Target.Cpu.Model = undefined;
        for (self.cores[0..self.core_no], 0..) |core, i| {
            known_models[i] = cpu_models.isKnown(.{
                .architecture = core.architecture,
                .implementer = core.implementer,
                .variant = core.variant,
                .part = core.part,
            }, is_64bit);
        }

        // XXX We pick the first core on big.LITTLE systems, hopefully the
        // LITTLE one.
        const model = known_models[0] orelse return null;
        return Target.Cpu{
            .arch = arch,
            .model = model,
            .features = model.features,
        };
    }