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authorMohsin Kazmi <sykazmi@cisco.com>2022-01-24 23:19:29 +0000
committerDamjan Marion <dmarion@me.com>2022-01-25 22:21:48 +0000
commit556b5a39b61d9982f5205a438b94772e265a213e (patch)
tree03b22abafe97352114a598f6de9aa417619e7ee7 /src/vppinfra
parent6ec81f209af854176374744d3bd1702502600f42 (diff)
vppinfra: add support for mask_compare for u64
Type: improvement Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com> Change-Id: Ie323a8445f8540cd26d92eb61807afad7f7a0b74
Diffstat (limited to 'src/vppinfra')
-rw-r--r--src/vppinfra/vector/mask_compare.h59
-rw-r--r--src/vppinfra/vector/test/mask_compare.c44
2 files changed, 103 insertions, 0 deletions
diff --git a/src/vppinfra/vector/mask_compare.h b/src/vppinfra/vector/mask_compare.h
index cac48a31f47..92d5ca35474 100644
--- a/src/vppinfra/vector/mask_compare.h
+++ b/src/vppinfra/vector/mask_compare.h
@@ -163,4 +163,63 @@ clib_mask_compare_u32 (u32 v, u32 *a, u64 *bitmap, u32 n_elts)
bitmap[0] = clib_mask_compare_u32_x64 (v, a, n_elts) & pow2_mask (n_elts);
}
+static_always_inline u64
+clib_mask_compare_u64_x64 (u64 v, u64 *a, u32 n_elts)
+{
+ u64 mask = 0;
+#if defined(CLIB_HAVE_VEC512)
+ u64x8 v8 = u64x8_splat (v);
+ u64x8u *av = (u64x8u *) a;
+ mask = ((u64) u64x8_is_equal_mask (av[0], v8) |
+ (u64) u64x8_is_equal_mask (av[1], v8) << 8 |
+ (u64) u64x8_is_equal_mask (av[2], v8) << 16 |
+ (u64) u64x8_is_equal_mask (av[3], v8) << 24 |
+ (u64) u64x8_is_equal_mask (av[4], v8) << 32 |
+ (u64) u64x8_is_equal_mask (av[5], v8) << 40 |
+ (u64) u64x8_is_equal_mask (av[6], v8) << 48 |
+ (u64) u64x8_is_equal_mask (av[7], v8) << 56);
+
+#elif defined(CLIB_HAVE_VEC256) && defined(__BMI2__)
+ u64x4 v4 = u64x4_splat (v);
+ u64x4u *av = (u64x4u *) a;
+
+ for (int i = 0; i < 16; i += 2)
+ {
+ u64 l = u8x32_msb_mask (v4 == av[i]);
+ u64 h = u8x32_msb_mask (v4 == av[i + 1]);
+ mask |= _pext_u64 (l | h << 32, 0x0101010101010101) << (i * 4);
+ }
+#else
+ for (int i = 0; i < n_elts; i++)
+ if (a[i] == v)
+ mask |= 1ULL << i;
+#endif
+ return mask;
+}
+
+/** \brief Compare 64-bit elemments with provied value and return bitmap
+
+ @param v value to compare elements with
+ @param a array of u64 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_u64 (u64 v, u64 *a, u64 *bitmap, u32 n_elts)
+{
+ while (n_elts >= 64)
+ {
+ bitmap++[0] = clib_mask_compare_u64_x64 (v, a, 64);
+ n_elts -= 64;
+ a += 64;
+ }
+
+ if (PREDICT_TRUE (n_elts == 0))
+ return;
+
+ bitmap[0] = clib_mask_compare_u64_x64 (v, a, n_elts) & pow2_mask (n_elts);
+}
+
#endif
diff --git a/src/vppinfra/vector/test/mask_compare.c b/src/vppinfra/vector/test/mask_compare.c
index 40cac1b6ce3..70608e11215 100644
--- a/src/vppinfra/vector/test/mask_compare.c
+++ b/src/vppinfra/vector/test/mask_compare.c
@@ -18,6 +18,12 @@ clib_mask_compare_u32_wrapper (u32 v, u32 *a, u64 *mask, u32 n_elts)
clib_mask_compare_u32 (v, a, mask, n_elts);
}
+__test_funct_fn void
+clib_mask_compare_u64_wrapper (u64 v, u64 *a, u64 *mask, u64 n_elts)
+{
+ clib_mask_compare_u64 (v, a, mask, n_elts);
+}
+
static clib_error_t *
test_clib_mask_compare_u16 (clib_error_t *err)
{
@@ -93,3 +99,41 @@ REGISTER_TEST (clib_mask_compare_u32) = {
.name = "clib_mask_compare_u32",
.fn = test_clib_mask_compare_u32,
};
+
+static clib_error_t *
+test_clib_mask_compare_u64 (clib_error_t *err)
+{
+ u64 array[513];
+ u64 mask[10];
+ u32 i, j;
+
+ for (i = 0; i < ARRAY_LEN (array); i++)
+ array[i] = i;
+
+ for (i = 0; i < ARRAY_LEN (array); i++)
+ {
+ for (j = 0; j < ARRAY_LEN (mask); j++)
+ mask[j] = 0xa5a5a5a5a5a5a5a5;
+
+ clib_mask_compare_u64_wrapper (i, array, mask, i + 1);
+
+ for (j = 0; j < (i >> 6); j++)
+ {
+ if (mask[j])
+ return clib_error_return (err, "mask at position %u not zero", j);
+ }
+ if (mask[j] != 1ULL << (i & 0x3f))
+ return clib_error_return (err,
+ "mask at position %u is %lx, expected %lx",
+ j, mask[j], 1ULL << (i % 64));
+
+ if (mask[j + 1] != 0xa5a5a5a5a5a5a5a5)
+ return clib_error_return (err, "mask overrun at position %u", j + 1);
+ }
+ return err;
+}
+
+REGISTER_TEST (clib_mask_compare_u64) = {
+ .name = "clib_mask_compare_u64",
+ .fn = test_clib_mask_compare_u64,
+};