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/* SPDX-License-Identifier: Apache-2.0
* Copyright(c) 2021 Cisco Systems, Inc.
*/
#ifndef included_vector_count_equal_h
#define included_vector_count_equal_h
#include <vppinfra/clib.h>
static_always_inline uword
clib_count_equal_u64 (u64 *data, uword max_count)
{
uword count;
u64 first;
if (max_count <= 1)
return max_count;
if (data[0] != data[1])
return 1;
count = 0;
first = data[0];
#if defined(CLIB_HAVE_VEC256)
u64x4 splat = u64x4_splat (first);
while (count + 3 < max_count)
{
u64 bmp;
bmp = u8x32_msb_mask ((u8x32) (u64x4_load_unaligned (data) == splat));
if (bmp != 0xffffffff)
{
count += count_trailing_zeros (~bmp) / 8;
return count;
}
data += 4;
count += 4;
}
#else
count += 2;
data += 2;
while (count + 3 < max_count && ((data[0] ^ first) | (data[1] ^ first) |
(data[2] ^ first) | (data[3] ^ first)) == 0)
{
data += 4;
count += 4;
}
#endif
while (count < max_count && (data[0] == first))
{
data += 1;
count += 1;
}
return count;
}
static_always_inline uword
clib_count_equal_u32 (u32 *data, uword max_count)
{
uword count;
u32 first;
if (max_count <= 1)
return max_count;
if (data[0] != data[1])
return 1;
count = 0;
first = data[0];
#if defined(CLIB_HAVE_VEC512)
u32x16 splat = u32x16_splat (first);
while (count + 15 < max_count)
{
u32 bmp;
bmp = u32x16_is_equal_mask (u32x16_load_unaligned (data), splat);
if (bmp != pow2_mask (16))
return count + count_trailing_zeros (~bmp);
data += 16;
count += 16;
}
if (count == max_count)
return count;
else
{
u32 mask = pow2_mask (max_count - count);
u32 bmp =
u32x16_is_equal_mask (u32x16_mask_load_zero (data, mask), splat) &
mask;
return count + count_trailing_zeros (~bmp);
}
#elif defined(CLIB_HAVE_VEC256)
u32x8 splat = u32x8_splat (first);
while (count + 7 < max_count)
{
u32 bmp;
#ifdef __AVX512F__
bmp = u32x8_is_equal_mask (u32x8_load_unaligned (data), splat);
if (bmp != pow2_mask (8))
return count + count_trailing_zeros (~bmp);
#else
bmp = u8x32_msb_mask ((u8x32) (u32x8_load_unaligned (data) == splat));
if (bmp != 0xffffffff)
return count + count_trailing_zeros (~bmp) / 4;
#endif
data += 8;
count += 8;
}
if (count == max_count)
return count;
#if defined(CLIB_HAVE_VEC256_MASK_LOAD_STORE)
else
{
u32 mask = pow2_mask (max_count - count);
u32 bmp =
u32x8_is_equal_mask (u32x8_mask_load_zero (data, mask), splat) & mask;
return count + count_trailing_zeros (~bmp);
}
#endif
#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK)
u32x4 splat = u32x4_splat (first);
while (count + 3 < max_count)
{
u64 bmp;
bmp = u8x16_msb_mask ((u8x16) (u32x4_load_unaligned (data) == splat));
if (bmp != pow2_mask (4 * 4))
{
count += count_trailing_zeros (~bmp) / 4;
return count;
}
data += 4;
count += 4;
}
#else
count += 2;
data += 2;
while (count + 3 < max_count && ((data[0] ^ first) | (data[1] ^ first) |
(data[2] ^ first) | (data[3] ^ first)) == 0)
{
data += 4;
count += 4;
}
#endif
while (count < max_count && (data[0] == first))
{
data += 1;
count += 1;
}
return count;
}
static_always_inline uword
clib_count_equal_u16 (u16 *data, uword max_count)
{
uword count;
u16 first;
if (max_count <= 1)
return max_count;
if (data[0] != data[1])
return 1;
count = 0;
first = data[0];
#if defined(CLIB_HAVE_VEC256)
u16x16 splat = u16x16_splat (first);
while (count + 15 < max_count)
{
u64 bmp;
bmp = u8x32_msb_mask ((u8x32) (u16x16_load_unaligned (data) == splat));
if (bmp != 0xffffffff)
{
count += count_trailing_zeros (~bmp) / 2;
return count;
}
data += 16;
count += 16;
}
#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK)
u16x8 splat = u16x8_splat (first);
while (count + 7 < max_count)
{
u64 bmp;
bmp = u8x16_msb_mask ((u8x16) (u16x8_load_unaligned (data) == splat));
if (bmp != 0xffff)
{
count += count_trailing_zeros (~bmp) / 2;
return count;
}
data += 8;
count += 8;
}
#else
count += 2;
data += 2;
while (count + 3 < max_count && ((data[0] ^ first) | (data[1] ^ first) |
(data[2] ^ first) | (data[3] ^ first)) == 0)
{
data += 4;
count += 4;
}
#endif
while (count < max_count && (data[0] == first))
{
data += 1;
count += 1;
}
return count;
}
static_always_inline uword
clib_count_equal_u8 (u8 *data, uword max_count)
{
uword count;
u8 first;
if (max_count <= 1)
return max_count;
if (data[0] != data[1])
return 1;
count = 0;
first = data[0];
#if defined(CLIB_HAVE_VEC512)
u8x64 splat = u8x64_splat (first);
while (count + 63 < max_count)
{
u64 bmp;
bmp = u8x64_is_equal_mask (u8x64_load_unaligned (data), splat);
if (bmp != -1)
return count + count_trailing_zeros (~bmp);
data += 64;
count += 64;
}
if (count == max_count)
return count;
#if defined(CLIB_HAVE_VEC512_MASK_LOAD_STORE)
else
{
u64 mask = pow2_mask (max_count - count);
u64 bmp =
u8x64_is_equal_mask (u8x64_mask_load_zero (data, mask), splat) & mask;
return count + count_trailing_zeros (~bmp);
}
#endif
#elif defined(CLIB_HAVE_VEC256)
u8x32 splat = u8x32_splat (first);
while (count + 31 < max_count)
{
u64 bmp;
bmp = u8x32_msb_mask ((u8x32) (u8x32_load_unaligned (data) == splat));
if (bmp != 0xffffffff)
return count + count_trailing_zeros (~bmp);
data += 32;
count += 32;
}
if (count == max_count)
return count;
#if defined(CLIB_HAVE_VEC256_MASK_LOAD_STORE)
else
{
u32 mask = pow2_mask (max_count - count);
u64 bmp =
u8x32_msb_mask (u8x32_mask_load_zero (data, mask) == splat) & mask;
return count + count_trailing_zeros (~bmp);
}
#endif
#elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK)
u8x16 splat = u8x16_splat (first);
while (count + 15 < max_count)
{
u64 bmp;
bmp = u8x16_msb_mask ((u8x16) (u8x16_load_unaligned (data) == splat));
if (bmp != 0xffff)
return count + count_trailing_zeros (~bmp);
data += 16;
count += 16;
}
#else
count += 2;
data += 2;
while (count + 3 < max_count && ((data[0] ^ first) | (data[1] ^ first) |
(data[2] ^ first) | (data[3] ^ first)) == 0)
{
data += 4;
count += 4;
}
#endif
while (count < max_count && (data[0] == first))
{
data += 1;
count += 1;
}
return count;
}
#endif
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