vppinfra: add 128-bit and 512-bit a ^ b ^ c shortcut

[vpp.git] / src / vppinfra / vector_neon.h

diff --git a/src/vppinfra/vector_neon.h b/src/vppinfra/vector_neon.h
index 5a7bbe3..3855f55 100644 (file)
--- a/src/vppinfra/vector_neon.h
+++ b/src/vppinfra/vector_neon.h
@@ -182,6 +182,38 @@ u32x4_min_scalar (u32x4 v)
   return vminvq_u32 (v);
 }
 
+static_always_inline u8x16
+u8x16_word_shift_left (u8x16 x, const int n)
+{
+  return vextq_u8 (u8x16_splat (0), x, 16 - n);
+}
+
+static_always_inline u8x16
+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);
+}
+
+static_always_inline u8x16
+u8x16_xor3 (u8x16 a, u8x16 b, u8x16 c)
+{
+#if __GNUC__ == 8 && __ARM_FEATURE_SHA3 == 1
+  u8x16 r;
+__asm__ ("eor3 %0.16b,%1.16b,%2.16b,%3.16b": "=w" (r): "0" (a), "w" (b), "w" (c):);
+  return r;
+#endif
+  return a ^ b ^ c;
+}
+
 #define CLIB_HAVE_VEC128_MSB_MASK
 
 #define CLIB_HAVE_VEC128_UNALIGNED_LOAD_STORE