Implement batch_bool::mask() for riscv

As a followup to #1236

Author: serge-sans-paille

include/xsimd/arch/xsimd_constants.hpp

@@ -12,7 +12,7 @@
 #ifndef XSIMD_NUMERICAL_CONSTANT_HPP
 #define XSIMD_NUMERICAL_CONSTANT_HPP
 
-#include <limits>
+//#include <limits>
 
 #include "../types/xsimd_utils.hpp"
 

include/xsimd/arch/xsimd_rvv.hpp

@@ -10,9 +10,9 @@
 #ifndef XSIMD_RVV_HPP
 #define XSIMD_RVV_HPP
 
-#include <complex>
-#include <type_traits>
-#include <utility>
+//#include <complex>
+//#include <type_traits>
+//#include <utility>
 
 #include "../types/xsimd_rvv_register.hpp"
 #include "xsimd_constants.hpp"
@@ -76,6 +76,8 @@
 #define XSIMD_RVV_M , _M,
 #define XSIMD_RVV_TSM XSIMD_RVV_T XSIMD_RVV_S XSIMD_RVV_M
 
+#define XSIMD_RVV_MASKED _m
+
 // XSIMD_RVV_OVERLOAD, below, expands to a head section, a number of body sections
 // (depending on which types are supported), and a tail section.  Different
 // variants of these sections are implemented with different suffixes on the
@@ -1507,6 +1509,16 @@ namespace xsimd
             const auto mask = abs(arg) < constants::maxflint<batch<T, A>>();
             return select(mask, to_float(detail::rvvfcvt_default(arg)), arg, rvv {});
         }
+
+        // mask
+        template <class A, class T>
+        XSIMD_INLINE uint64_t mask(batch_bool<T, A> const& self, requires_arch<rvv>) noexcept
+        {
+            auto ones = detail::broadcast<as_unsigned_integer_t<T>, A::width>(1);
+            auto iota = vindex<A, T>();
+            auto powers = detail::rvvsll(ones, iota);
+            return __riscv_vredor(self.data, powers);
+        }
     } // namespace kernel
 } // namespace xsimd
 

include/xsimd/types/xsimd_register.hpp

@@ -12,7 +12,7 @@
 #ifndef XSIMD_REGISTER_HPP
 #define XSIMD_REGISTER_HPP
 
-#include <type_traits>
+//#include <type_traits>
 
 namespace xsimd
 {

include/xsimd/types/xsimd_utils.hpp

@@ -12,12 +12,12 @@
 #ifndef XSIMD_UTILS_HPP
 #define XSIMD_UTILS_HPP
 
-#include <complex>
-#include <cstdint>
-#include <cstring>
-#include <tuple>
-#include <type_traits>
-#include <utility>
+//#include <complex>
+//#include <cstdint>
+//#include <cstring>
+//#include <tuple>
+//#include <type_traits>
+//#include <utility>
 
 #ifdef XSIMD_ENABLE_XTL_COMPLEX
 #include "xtl/xcomplex.hpp"