kfr

commit dc3757a51967dfb883f12b07e22aed901e5beecc
parent 744f1e945bc8d1855394e7d5fc2175041335f3f8
Author: d.levin256@gmail.com <d.levin256@gmail.com>
Date:   Fri,  4 Nov 2016 03:03:12 +0300

Subscript operator for mask

Diffstat:
M
include/kfr/base/vec.hpp
 | 
10
+++++++++-

1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/include/kfr/base/vec.hpp b/include/kfr/base/vec.hpp
@@ -98,6 +98,8 @@ struct mask : vec<T, N>
     }
     KFR_I_CE mask operator^(const base& y) const noexcept { return static_cast<const base&>(*this) ^ y; }
 
+    bool operator[](size_t index) const noexcept;
+
     constexpr base asvec() const noexcept { return static_cast<const base&>(*this); }
 };
 
@@ -501,6 +503,12 @@ constexpr CMT_INLINE vec<To, Nout> fbitcast(const vec<From, N>& value) noexcept
     return vec<To, Nout>::frombits(value);
 }
 
+template <typename T, size_t N>
+inline bool mask<T, N>::operator[](size_t index) const noexcept
+{
+    return ibitcast(base::operator[](index)) < 0;
+}
+
 constexpr CMT_INLINE size_t vector_alignment(size_t size) { return next_poweroftwo(size); }
 
 namespace internal
@@ -969,7 +977,7 @@ CMT_INLINE f64x2 tovec(__m128d x) { return f64x2(x); }
 #endif
 
 template <typename T, typename... Args, size_t Nout = (sizeof...(Args) + 1)>
-constexpr CMT_INLINE vec<T, Nout> make_mask(bool arg, Args... args)
+constexpr CMT_INLINE mask<T, Nout> make_mask(bool arg, Args... args)
 {
     return vec<T, Nout>(internal::maskbits<T>(arg), internal::maskbits<T>(static_cast<bool>(args))...);
 }