vector_element_traits.hh

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#ifndef __ARCH_ARM_VECTOR_ELEMENT_TRAITS_HH__
#define __ARCH_ARM_VECTOR_ELEMENT_TRAITS_HH__
 
#include <type_traits>
 
namespace gem5 {
namespace ArmISA {
namespace vector_element_traits {
 
 
// Make an integral type with the size of IntDestElemType but the
// signed-ness of IntSrcElemType. The size of IntDestElemType must be
// greater than or equal to the size of IntSrcElemType.
template<typename IntDestElemType,
         typename IntSrcElemType>
class extend_element
{
  public:
    static_assert(std::is_integral<IntDestElemType>::value
                  && std::is_integral<IntSrcElemType>::value
                  && sizeof(IntDestElemType) >= sizeof(IntSrcElemType),
                  "Extended Element Dest and Src types must both be "
                  "integer types, and Dest must be at least as large "
                  "as Src.");
    using type = typename std::conditional<
        std::is_signed<IntSrcElemType>::value,
        typename std::make_signed<IntDestElemType>::type,
        typename std::make_unsigned<IntDestElemType>::type>::type;
};
 
 
} // namespace vector_element_traits
} // namespace ArmISA
} // namespace gem5
 
#endif // __ARCH_ARM_VECTOR_ELEMENT_TRAITS_HH__