1 files changed, 12 insertions, 0 deletions
diff --git a/src/f32/sse2/vec4.rs b/src/f32/sse2/vec4.rs
index 0e0882c..f1a1311 100644
--- a/src/f32/sse2/vec4.rs
+++ b/src/f32/sse2/vec4.rs
@@ -294,6 +294,18 @@ impl Vec4 {
         }
     }
 
+    /// Returns a vector with signs of `rhs` and the magnitudes of `self`.
+    #[inline]
+    pub fn copysign(self, rhs: Self) -> Self {
+        unsafe {
+            let mask = Self::splat(-0.0);
+            Self(_mm_or_ps(
+                _mm_and_ps(rhs.0, mask.0),
+                _mm_andnot_ps(mask.0, self.0),
+            ))
+        }
+    }
+
     /// Returns a bitmask with the lowest 4 bits set to the sign bits from the elements of `self`.
     ///
     /// A negative element results in a `1` bit and a positive element in a `0` bit.  Element `x` goes