diff --git a/src/plugins/af_xdp/input.c b/src/plugins/af_xdp/input.c
index c5b3488..e065ee2 100644
--- a/src/plugins/af_xdp/input.c
+++ b/src/plugins/af_xdp/input.c
@@ -146,8 +146,8 @@
   while (n >= 8)
     {
 #ifdef CLIB_HAVE_VEC256
-      u64x4 b0 = u32x4_extend_to_u64x4 (*(u32x4u *) (bi + 0));
-      u64x4 b1 = u32x4_extend_to_u64x4 (*(u32x4u *) (bi + 4));
+      u64x4 b0 = u64x4_from_u32x4 (*(u32x4u *) (bi + 0));
+      u64x4 b1 = u64x4_from_u32x4 (*(u32x4u *) (bi + 4));
       *(u64x4u *) (fill + 0) = bi2addr (b0);
       *(u64x4u *) (fill + 4) = bi2addr (b1);
 #else
diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h
index a2d779b..95b622c 100644
--- a/src/vlib/buffer_funcs.h
+++ b/src/vlib/buffer_funcs.h
@@ -221,8 +221,8 @@
      se we maintain two-in-parallel variant */
   while (count >= 8)
     {
-      u64x4 b0 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi));
-      u64x4 b1 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi + 4));
+      u64x4 b0 = u64x4_from_u32x4 (u32x4_load_unaligned (bi));
+      u64x4 b1 = u64x4_from_u32x4 (u32x4_load_unaligned (bi + 4));
       /* shift and add to get vlib_buffer_t pointer */
       u64x4_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
       u64x4_store_unaligned ((b1 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b + 4);
@@ -234,18 +234,18 @@
   while (count >= 4)
     {
 #ifdef CLIB_HAVE_VEC256
-      u64x4 b0 = u32x4_extend_to_u64x4 (u32x4_load_unaligned (bi));
+      u64x4 b0 = u64x4_from_u32x4 (u32x4_load_unaligned (bi));
       /* shift and add to get vlib_buffer_t pointer */
       u64x4_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
 #elif defined (CLIB_HAVE_VEC128)
       u64x2 off = u64x2_splat (buffer_mem_start + offset);
       u32x4 bi4 = u32x4_load_unaligned (bi);
-      u64x2 b0 = u32x4_extend_to_u64x2 ((u32x4) bi4);
+      u64x2 b0 = u64x2_from_u32x4 ((u32x4) bi4);
 #if defined (__aarch64__)
-      u64x2 b1 = u32x4_extend_to_u64x2_high ((u32x4) bi4);
+      u64x2 b1 = u64x2_from_u32x4_high ((u32x4) bi4);
 #else
       bi4 = u32x4_shuffle (bi4, 2, 3, 0, 1);
-      u64x2 b1 = u32x4_extend_to_u64x2 ((u32x4) bi4);
+      u64x2 b1 = u64x2_from_u32x4 ((u32x4) bi4);
 #endif
       u64x2_store_unaligned ((b0 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b);
       u64x2_store_unaligned ((b1 << CLIB_LOG2_CACHE_LINE_BYTES) + off, b + 2);
diff --git a/src/vnet/ip/ip_packet.h b/src/vnet/ip/ip_packet.h
index e67cec1..52a65e7 100644
--- a/src/vnet/ip/ip_packet.h
+++ b/src/vnet/ip/ip_packet.h
@@ -176,10 +176,10 @@
       v1 = u16x16_byte_swap (v1);
       v2 = u16x16_byte_swap (v2);
 #endif
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_lo (v1));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_hi (v1));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_lo (v2));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_hi (v2));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v2));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v2));
       n_left -= 32;
       data += 64;
     }
@@ -191,8 +191,8 @@
       v1 = u16x16_byte_swap (v1);
 #endif
       v1 = u16x16_byte_swap (u16x16_load_unaligned (data));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_lo (v1));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_hi (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1));
       n_left -= 16;
       data += 32;
     }
@@ -204,8 +204,8 @@
       v1 = u16x16_byte_swap (v1);
 #endif
       v1 = u16x16_mask_last (v1, 16 - n_left);
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_lo (v1));
-      sum8 += u16x8_extend_to_u32x8 (u16x16_extract_hi (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1));
+      sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1));
     }
 
   sum8 = u32x8_hadd (sum8, zero);
diff --git a/src/vppinfra/vector_avx2.h b/src/vppinfra/vector_avx2.h
index 0511ec7..4cd2dc1 100644
--- a/src/vppinfra/vector_avx2.h
+++ b/src/vppinfra/vector_avx2.h
@@ -110,11 +110,11 @@
   return _mm256_movemask_epi8 ((__m256i) v);
 }
 
-/* _extend_to_ */
+/* _from_ */
 /* *INDENT-OFF* */
 #define _(f,t,i) \
 static_always_inline t							\
-f##_extend_to_##t (f x)							\
+t##_from_##f (f x)							\
 { return (t) _mm256_cvt##i ((__m128i) x); }
 
 _(u16x8, u32x8, epu16_epi32)
diff --git a/src/vppinfra/vector_neon.h b/src/vppinfra/vector_neon.h
index 15af098..ffcbe70 100644
--- a/src/vppinfra/vector_neon.h
+++ b/src/vppinfra/vector_neon.h
@@ -122,13 +122,13 @@
 }
 
 static_always_inline u64x2
-u32x4_extend_to_u64x2 (u32x4 v)
+u64x2_from_u32x4 (u32x4 v)
 {
   return vmovl_u32 (vget_low_u32 (v));
 }
 
 static_always_inline u64x2
-u32x4_extend_to_u64x2_high (u32x4 v)
+u64x2_from_u32x4_high (u32x4 v)
 {
   return vmovl_high_u32 (v);
 }
diff --git a/src/vppinfra/vector_sse42.h b/src/vppinfra/vector_sse42.h
index 8c28dd7..effab3f 100644
--- a/src/vppinfra/vector_sse42.h
+++ b/src/vppinfra/vector_sse42.h
@@ -676,11 +676,11 @@
 #endif
 }
 
-/* _extend_to_ */
+/* _from_ */
 /* *INDENT-OFF* */
 #define _(f,t,i) \
 static_always_inline t							\
-f##_extend_to_##t (f x)							\
+t##_from_##f (f x)							\
 { return (t) _mm_cvt##i ((__m128i) x); }
 
 _(u8x16, u16x8, epu8_epi16)