WIP

Author: serge-sans-paille

include/xsimd/arch/xsimd_rvv.hpp

@@ -1545,7 +1545,7 @@ namespace xsimd
                 auto r_low = __riscv_vredor(low_mask.data.as_mask(), upowers_low, (typename decltype(zero)::register_type)zero, batch_bool<T, A>::size);
 
                 // The high part requires a sub before the shift.
-                auto iota_high = __riscv_vsub(detail::vindex<A, as_unsigned_integer_t<T>>(), 8 * sizeof(T), batch_bool<T, A>::size);
+                auto iota_high = __riscv_vsub(iota, 8 * sizeof(T), batch_bool<T, A>::size);
                 auto upowers_high = detail::rvvsll(ones, iota_high);
                 auto high_mask = self & make_batch_bool_constant<T, UpperHalf, A>();
                 auto r_high = __riscv_vredor(high_mask.data.as_mask(), upowers_high, (typename decltype(zero)::register_type)zero, batch_bool<T, A>::size);
@@ -1555,6 +1555,7 @@ namespace xsimd
             }
             else
             {
+                // (C) we could generalize (B) but we already cover a lot of case now.
                 return mask(self, common {});
             }
         }