pub const CallConv = enum(u10) {
    ccc,

    fastcc = 8,
    coldcc,
    ghccc,

    webkit_jscc = 12,
    anyregcc,
    preserve_mostcc,
    preserve_allcc,
    swiftcc,
    cxx_fast_tlscc,
    tailcc,
    cfguard_checkcc,
    swifttailcc,

    x86_stdcallcc = 64,
    x86_fastcallcc,
    arm_apcscc,
    arm_aapcscc,
    arm_aapcs_vfpcc,
    msp430_intrcc,
    x86_thiscallcc,
    ptx_kernel,
    ptx_device,

    spir_func = 75,
    spir_kernel,
    intel_ocl_bicc,
    x86_64_sysvcc,
    win64cc,
    x86_vectorcallcc,
    hhvmcc,
    hhvm_ccc,
    x86_intrcc,
    avr_intrcc,
    avr_signalcc,
    avr_builtincc,

    amdgpu_vs = 87,
    amdgpu_gs,
    amdgpu_ps,
    amdgpu_cs,
    amdgpu_kernel,
    x86_regcallcc,
    amdgpu_hs,
    msp430_builtincc,

    amdgpu_ls = 95,
    amdgpu_es,
    aarch64_vector_pcs,
    aarch64_sve_vector_pcs,

    amdgpu_gfx = 100,

    m68k_intrcc,

    aarch64_sme_preservemost_from_x0 = 102,
    aarch64_sme_preservemost_from_x2,

    m68k_rtdcc = 106,

    riscv_vectorcallcc = 110,

    _,

    pub const default = CallConv.ccc;

    pub fn format(
        self: CallConv,
        comptime _: []const u8,
        _: std.fmt.FormatOptions,
        writer: anytype,
    ) @TypeOf(writer).Error!void {
        switch (self) {
            default => {},
            .fastcc,
            .coldcc,
            .ghccc,
            .webkit_jscc,
            .anyregcc,
            .preserve_mostcc,
            .preserve_allcc,
            .swiftcc,
            .cxx_fast_tlscc,
            .tailcc,
            .cfguard_checkcc,
            .swifttailcc,
            .x86_stdcallcc,
            .x86_fastcallcc,
            .arm_apcscc,
            .arm_aapcscc,
            .arm_aapcs_vfpcc,
            .msp430_intrcc,
            .x86_thiscallcc,
            .ptx_kernel,
            .ptx_device,
            .spir_func,
            .spir_kernel,
            .intel_ocl_bicc,
            .x86_64_sysvcc,
            .win64cc,
            .x86_vectorcallcc,
            .hhvmcc,
            .hhvm_ccc,
            .x86_intrcc,
            .avr_intrcc,
            .avr_signalcc,
            .avr_builtincc,
            .amdgpu_vs,
            .amdgpu_gs,
            .amdgpu_ps,
            .amdgpu_cs,
            .amdgpu_kernel,
            .x86_regcallcc,
            .amdgpu_hs,
            .msp430_builtincc,
            .amdgpu_ls,
            .amdgpu_es,
            .aarch64_vector_pcs,
            .aarch64_sve_vector_pcs,
            .amdgpu_gfx,
            .m68k_intrcc,
            .aarch64_sme_preservemost_from_x0,
            .aarch64_sme_preservemost_from_x2,
            .m68k_rtdcc,
            .riscv_vectorcallcc,
            => try writer.print(" {s}", .{@tagName(self)}),
            _ => try writer.print(" cc{d}", .{@intFromEnum(self)}),
        }
    }
}