WIP

Author: serge-sans-paille

include/xsimd/arch/xsimd_neon.hpp

@@ -3211,6 +3211,19 @@ namespace xsimd
         {
             return vreinterpretq_f32_u32(swizzle(batch<uint32_t, A>(vreinterpretq_u32_f32(self)), mask, A {}));
         }
+
+        /*********
+         * widen *
+         *********/
+        template <class A, class T, detail::enable_sized_signed_t<T, 1> = 0>
+        XSIMD_INLINE std::array<batch<widen_t<T>, A>, 2> widen(batch<T, A> const& x, requires_arch<neon>) noexcept {
+          return {batch<widen_t<T>, A>(vaddl_s8(vget_low_s8(x), vdup_n_s8(0))), batch<widen_t<T>, A>(vaddl_s8(vget_high_s8(x), vdup_n_s8(0)))};
+        }
+        template <class A, class T, detail::enable_sized_unsigned_t<T, 1> = 0>
+        XSIMD_INLINE std::array<batch<widen_t<T>, A>, 2> widen(batch<T, A> const& x, requires_arch<neon>) noexcept {
+          return {batch<widen_t<T>, A>(vaddl_u8(vget_low_u8(x), vdup_n_u8(0))), batch<widen_t<T>, A>(vaddl_u8(vget_high_u8(x), vdup_n_u8(0)))};
+        }
+
     }
 
 }