2 files changed, 18 insertions, 0 deletions
diff --git a/src/vppinfra/vector_neon.h b/src/vppinfra/vector_neon.h
index 307fbc541b2..81d99a64f05 100644
--- a/src/vppinfra/vector_neon.h
+++ b/src/vppinfra/vector_neon.h
@@ -194,6 +194,15 @@ u8x16_word_shift_right (u8x16 x, const int n)
   return vextq_u8 (x, u8x16_splat (0), n);
 }
 
+static_always_inline u8x16
+u8x16_reflect (u8x16 v)
+{
+  u8x16 mask = {
+    15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
+  };
+  return (u8x16) vqtbl1q_u8 (v, mask);
+}
+
 #define CLIB_HAVE_VEC128_MSB_MASK
 
 #define CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE
diff --git a/src/vppinfra/vector_sse42.h b/src/vppinfra/vector_sse42.h
index 0c1b2f0324f..c22e86e7437 100644
--- a/src/vppinfra/vector_sse42.h
+++ b/src/vppinfra/vector_sse42.h
@@ -635,6 +635,15 @@ u16x8_byte_swap (u16x8 v)
   return (u16x8) _mm_shuffle_epi8 ((__m128i) v, (__m128i) swap);
 }
 
+static_always_inline u8x16
+u8x16_reflect (u8x16 v)
+{
+  u8x16 mask = {
+    15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
+  };
+  return (u8x16) _mm_shuffle_epi8 ((__m128i) v, (__m128i) mask);
+}
+
 static_always_inline u32x4
 u32x4_hadd (u32x4 v1, u32x4 v2)
 {