WIP

Author: serge-sans-paille

include/xsimd/arch/xsimd_altivec.hpp

@@ -107,7 +107,7 @@ namespace xsimd
         XSIMD_INLINE batch<T, A> avg(batch<T, A> const& self, batch<T, A> const& other, requires_arch<altivec>) noexcept
         {
             constexpr auto nbit = 8 * sizeof(T) - 1;
-            constexpr auto adj = ((self ^ other) << nbit) >> nbit;
+            auto adj = ((self ^ other) << nbit) >> nbit;
             return avgr(self.data, other.data, A {}) - adj;
         }
 
@@ -613,7 +613,7 @@ namespace xsimd
         template <class A, class T, class = typename std::enable_if<std::is_scalar<T>::value, void>::type>
         XSIMD_INLINE batch<T, A> neg(batch<T, A> const& self, requires_arch<altivec>) noexcept
         {
-            return vec_neg(self.data);
+            return -(self.data);
         }
 
         // neq