vppinfra: put each vector function into own file

Type: refactor
Change-Id: I2dd9a18497992ac7e2686c14f5d17eccccda0cda
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 166 insertions, 0 deletions

diff --git a/src/vppinfra/vector/mask_compare.h b/src/vppinfra/vector/mask_compare.h
new file mode 100644
index 00000000000..cac48a31f47
--- /dev/null
+++ b/src/vppinfra/vector/mask_compare.h
@@ -0,0 +1,166 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2021 Cisco Systems, Inc.
+ */
+
+#ifndef included_vector_mask_compare_h
+#define included_vector_mask_compare_h
+#include <vppinfra/clib.h>
+#include <vppinfra/memcpy.h>
+
+static_always_inline u64
+clib_mask_compare_u16_x64 (u16 v, u16 *a, u32 n_elts)
+{
+  u64 mask = 0;
+#if defined(CLIB_HAVE_VEC512)
+  u16x32 v32 = u16x32_splat (v);
+  u16x32u *av = (u16x32u *) a;
+  mask = ((u64) u16x32_is_equal_mask (av[0], v32) |
+	  (u64) u16x32_is_equal_mask (av[1], v32) << 32);
+#elif defined(CLIB_HAVE_VEC256)
+  u16x16 v16 = u16x16_splat (v);
+  u16x16u *av = (u16x16u *) a;
+  i8x32 x;
+
+  x = i8x32_pack (v16 == av[0], v16 == av[1]);
+  mask = i8x32_msb_mask ((i8x32) u64x4_permute (x, 0, 2, 1, 3));
+  x = i8x32_pack (v16 == av[2], v16 == av[3]);
+  mask |= (u64) i8x32_msb_mask ((i8x32) u64x4_permute (x, 0, 2, 1, 3)) << 32;
+#elif defined(CLIB_HAVE_VEC128) && defined(__ARM_NEON)
+  u16x8 v8 = u16x8_splat (v);
+  u16x8 m = { 1, 2, 4, 8, 16, 32, 64, 128 };
+  u16x8u *av = (u16x8u *) a;
+
+  /* compare each u16 elemment with v8, result gives 0xffff in each element
+     of the resulting vector if comparison result is true.
+     Bitwise AND with m will give us one bit set for true result and offset
+     of that bit represend element index. Finally vaddvq_u16() gives us sum
+     of all elements of the vector which will give us u8 bitmap. */
+
+  for (int i = 0; i < 8; i++)
+    mask |= (u64) vaddvq_u16 ((av[i] == v8) & m) << (i * 8);
+
+#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK)
+  u16x8 v8 = u16x8_splat (v);
+  u16x8u *av = (u16x8u *) a;
+  mask = ((u64) i8x16_msb_mask (i8x16_pack (v8 == av[0], v8 == av[1])) |
+	  (u64) i8x16_msb_mask (i8x16_pack (v8 == av[2], v8 == av[3])) << 16 |
+	  (u64) i8x16_msb_mask (i8x16_pack (v8 == av[4], v8 == av[5])) << 32 |
+	  (u64) i8x16_msb_mask (i8x16_pack (v8 == av[6], v8 == av[7])) << 48);
+#else
+  for (int i = 0; i < n_elts; i++)
+    if (a[i] == v)
+      mask |= 1ULL << i;
+#endif
+  return mask;
+}
+
+/** \brief Compare 16-bit elemments with provied value and return bitmap
+
+    @param v value to compare elements with
+    @param a array of u16 elements
+    @param mask array of u64 where reuslting mask will be stored
+    @param n_elts number of elements in the array
+    @return none
+*/
+
+static_always_inline void
+clib_mask_compare_u16 (u16 v, u16 *a, u64 *mask, u32 n_elts)
+{
+  while (n_elts >= 64)
+    {
+      mask++[0] = clib_mask_compare_u16_x64 (v, a, 64);
+      n_elts -= 64;
+      a += 64;
+    }
+
+  if (PREDICT_TRUE (n_elts == 0))
+    return;
+
+  mask[0] = clib_mask_compare_u16_x64 (v, a, n_elts) & pow2_mask (n_elts);
+}
+
+static_always_inline u64
+clib_mask_compare_u32_x64 (u32 v, u32 *a, u32 n_elts)
+{
+  u64 mask = 0;
+#if defined(CLIB_HAVE_VEC512)
+  u32x16 v16 = u32x16_splat (v);
+  u32x16u *av = (u32x16u *) a;
+  mask = ((u64) u32x16_is_equal_mask (av[0], v16) |
+	  (u64) u32x16_is_equal_mask (av[1], v16) << 16 |
+	  (u64) u32x16_is_equal_mask (av[2], v16) << 32 |
+	  (u64) u32x16_is_equal_mask (av[3], v16) << 48);
+#elif defined(CLIB_HAVE_VEC256)
+  u32x8 v8 = u32x8_splat (v);
+  u32x8u *av = (u32x8u *) a;
+  u32x8 m = { 0, 4, 1, 5, 2, 6, 3, 7 };
+  i8x32 c;
+
+  c = i8x32_pack (i16x16_pack ((i32x8) (v8 == av[0]), (i32x8) (v8 == av[1])),
+		  i16x16_pack ((i32x8) (v8 == av[2]), (i32x8) (v8 == av[3])));
+  mask = i8x32_msb_mask ((i8x32) u32x8_permute ((u32x8) c, m));
+
+  c = i8x32_pack (i16x16_pack ((i32x8) (v8 == av[4]), (i32x8) (v8 == av[5])),
+		  i16x16_pack ((i32x8) (v8 == av[6]), (i32x8) (v8 == av[7])));
+  mask |= (u64) i8x32_msb_mask ((i8x32) u32x8_permute ((u32x8) c, m)) << 32;
+
+#elif defined(CLIB_HAVE_VEC128) && defined(__ARM_NEON)
+  u32x4 v4 = u32x4_splat (v);
+  u32x4 m = { 1, 2, 4, 8 };
+  u32x4u *av = (u32x4u *) a;
+
+  /* compare each u32 elemment with v4, result gives -1 in each element
+     of the resulting vector if comparison result is true.
+     Bitwise AND with m will give us one bit set for true result and offset
+     of that bit represend element index. Finally vaddvq_u32() gives us sum
+     of all elements of the vector which will give us u8 bitmap. */
+
+  for (int i = 0; i < 16; i++)
+    mask |= (u64) vaddvq_u32 ((av[i] == v4) & m) << (i * 4);
+
+#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK)
+  u32x4 v4 = u32x4_splat (v);
+  u32x4u *av = (u32x4u *) a;
+
+  for (int i = 0; i < 4; i++)
+    {
+      i16x8 p1 = i16x8_pack (v4 == av[0], v4 == av[1]);
+      i16x8 p2 = i16x8_pack (v4 == av[2], v4 == av[3]);
+      mask |= (u64) i8x16_msb_mask (i8x16_pack (p1, p2)) << (i * 16);
+      av += 4;
+    }
+
+#else
+  for (int i = 0; i < n_elts; i++)
+    if (a[i] == v)
+      mask |= 1ULL << i;
+#endif
+  return mask;
+}
+
+/** \brief Compare 32-bit elemments with provied value and return bitmap
+
+    @param v value to compare elements with
+    @param a array of u32 elements
+    @param mask array of u64 where reuslting mask will be stored
+    @param n_elts number of elements in the array
+    @return none
+*/
+
+static_always_inline void
+clib_mask_compare_u32 (u32 v, u32 *a, u64 *bitmap, u32 n_elts)
+{
+  while (n_elts >= 64)
+    {
+      bitmap++[0] = clib_mask_compare_u32_x64 (v, a, 64);
+      n_elts -= 64;
+      a += 64;
+    }
+
+  if (PREDICT_TRUE (n_elts == 0))
+    return;
+
+  bitmap[0] = clib_mask_compare_u32_x64 (v, a, n_elts) & pow2_mask (n_elts);
+}
+
+#endif