Add simd::movemask().

include/simd/vector.hpp

@@ -158,6 +158,20 @@ inline Vector<float, 4> andnot(const Vector<float, 4> &a, const Vector<float, 4>
 	return Vector<float, 4>(_mm_andnot_ps(a.v, b.v));
 }
 
+/** Returns an integer with each bit corresponding to the most significant bit of each element.
+For example, `movemask(float_4::mask())` returns 0xf.
+*/
+inline int movemask(const Vector<float, 4> &a) {
+	return _mm_movemask_ps(a.v);
+}
+
+/** Returns an integer with each bit corresponding to the most significant bit of each byte.
+For example, `movemask(int32_4::mask())` returns 0xffff.
+*/
+inline int movemask(const Vector<int32_t, 4> &a) {
+	return _mm_movemask_epi8(a.v);
+}
+
 
 // Operator overloads