#ifndef included_vector_funcs_h
#define included_vector_funcs_h
#include <vppinfra/clib.h>
-
-/** \brief Compare 64 16-bit elemments with provied value and return bitmap
-
- @param v value to compare elements with
- @param a array of 64 u16 elements
- @return u64 bitmap where each bit represents result of comparison
-*/
+#include <vppinfra/memcpy.h>
static_always_inline u64
-clib_compare_u16_x64 (u16 v, u16 *a)
+clib_mask_compare_u16_x64 (u16 v, u16 *a, u32 n_elts)
{
u64 mask = 0;
#if defined(CLIB_HAVE_VEC512)
u16x16u *av = (u16x16u *) a;
i8x32 x;
- x = i16x16_pack (v16 == av[0], v16 == av[1]);
+ x = i8x32_pack (v16 == av[0], v16 == av[1]);
mask = i8x32_msb_mask ((i8x32) u64x4_permute (x, 0, 2, 1, 3));
- x = i16x16_pack (v16 == av[2], v16 == av[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 idx8 = u16x8_splat (v);
+ u16x8 v8 = u16x8_splat (v);
u16x8 m = { 1, 2, 4, 8, 16, 32, 64, 128 };
u16x8u *av = (u16x8u *) a;
- /* compare each u16 elemment with idx8, result gives 0xffff in each element
+ /* 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. */
- mask = ((u64) vaddvq_u16 ((av[0] == idx8) & m) |
- (u64) vaddvq_u16 ((av[1] == idx8) & m) << 8 |
- (u64) vaddvq_u16 ((av[2] == idx8) & m) << 16 |
- (u64) vaddvq_u16 ((av[3] == idx8) & m) << 24 |
- (u64) vaddvq_u16 ((av[4] == idx8) & m) << 32 |
- (u64) vaddvq_u16 ((av[5] == idx8) & m) << 40 |
- (u64) vaddvq_u16 ((av[6] == idx8) & m) << 48 |
- (u64) vaddvq_u16 ((av[7] == idx8) & m) << 56);
+ 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 idx8 = u16x8_splat (v);
+ u16x8 v8 = u16x8_splat (v);
u16x8u *av = (u16x8u *) a;
- mask =
- ((u64) i8x16_msb_mask (i16x8_pack (idx8 == av[0], idx8 == av[1])) |
- (u64) i8x16_msb_mask (i16x8_pack (idx8 == av[2], idx8 == av[3])) << 16 |
- (u64) i8x16_msb_mask (i16x8_pack (idx8 == av[4], idx8 == av[5])) << 32 |
- (u64) i8x16_msb_mask (i16x8_pack (idx8 == av[6], idx8 == av[7])) << 48);
+ 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 < 64; i++)
+ 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);
+}
+
+static_always_inline u32 *
+clib_compress_u32_x64 (u32 *dst, u32 *src, u64 mask)
+{
+#if defined(CLIB_HAVE_VEC512_COMPRESS)
+ u32x16u *sv = (u32x16u *) src;
+ for (int i = 0; i < 4; i++)
+ {
+ int cnt = _popcnt32 ((u16) mask);
+ u32x16_compress_store (sv[i], mask, dst);
+ dst += cnt;
+ mask >>= 16;
+ }
+
+#elif defined(CLIB_HAVE_VEC256_COMPRESS)
+ u32x8u *sv = (u32x8u *) src;
+ for (int i = 0; i < 8; i++)
+ {
+ int cnt = _popcnt32 ((u8) mask);
+ u32x8_compress_store (sv[i], mask, dst);
+ dst += cnt;
+ mask >>= 8;
+ }
+#else
+ while (mask)
+ {
+ u16 bit = count_trailing_zeros (mask);
+ mask = clear_lowest_set_bit (mask);
+ dst++[0] = src[bit];
+ }
+#endif
+ return dst;
+}
+
+/** \brief Compare array of 32-bit elemments into destination array based on
+ * mask
+
+ @param dst destination array of u32 elements
+ @param src source array of u32 elements
+ @param mask array of u64 values representing compress mask
+ @param n_elts number of elements in the source array
+ @return number of elements stored in destionation array
+*/
+
+static_always_inline u32
+clib_compress_u32 (u32 *dst, u32 *src, u64 *mask, u32 n_elts)
+{
+ u32 *dst0 = dst;
+ while (n_elts >= 64)
+ {
+ if (mask[0] == ~0ULL)
+ {
+ clib_memcpy_u32 (dst, src, 64);
+ dst += 64;
+ }
+ else
+ dst = clib_compress_u32_x64 (dst, src, mask[0]);
+
+ mask++;
+ src += 64;
+ n_elts -= 64;
+ }
+
+ if (PREDICT_TRUE (n_elts == 0))
+ return dst - dst0;
+
+ return clib_compress_u32_x64 (dst, src, mask[0] & pow2_mask (n_elts)) - dst0;
+}
+
#endif
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