# std::experimental::simd_abi::max_fixed_size

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< cpp‎ | experimental‎ | simd

Defined in header `<experimental/simd>` |  |
template< class T > constexpr int max_fixed_size = /*implementation-defined*/; |  | (parallelism TS v2)

The value of max_fixed_size<T> declares that an instance of simd<T, fixed_size<N>> with N <= max_fixed_size<T> is supported by the implementation. The value of max_fixed_size<T> is at least 32.

### Notes

It is unspecified whether an implementation supports simd<T, fixed_size<N>> with N > max_fixed_size<T>. The value of max_fixed_size<T> may depend on compiler flags and may change between different compiler versions.

### Example

Run this code

    #include <cstdint>
    #include <experimental/simd>
    #include <iostream>
    namespace stq = std::experimental;

    int main()
    {
        std::cout << stq::simd_abi::max_fixed_size<std::uint8_t> << ' ';
        std::cout << stq::simd_abi::max_fixed_size<std::uint64_t> << ' ';
        std::cout << stq::simd_abi::max_fixed_size<float> << ' ';
        std::cout << stq::simd_abi::max_fixed_size<long double> << '\n';
    }

Possible output:

    32 32 32 32

### See also

fixed_size (parallelism TS v2) | tag type for storing specified number of elements (alias template)

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