diff options
Diffstat (limited to 'src/vppinfra')
| -rw-r--r-- | src/vppinfra/string.h | 77 |
1 files changed, 30 insertions, 47 deletions
diff --git a/src/vppinfra/string.h b/src/vppinfra/string.h index 3dafe899a8f..4f96450ce9e 100644 --- a/src/vppinfra/string.h +++ b/src/vppinfra/string.h @@ -472,8 +472,8 @@ clib_count_equal_u64 (u64 * data, uword max_count) uword count; u64 first; - if (max_count == 1) - return 1; + if (max_count <= 1) + return max_count; if (data[0] != data[1]) return 1; @@ -482,23 +482,20 @@ clib_count_equal_u64 (u64 * data, uword max_count) #if defined(CLIB_HAVE_VEC256) u64x4 splat = u64x4_splat (first); - while (1) + 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 clib_min (count, max_count); + return count; } data += 4; count += 4; - - if (count >= max_count) - return max_count; } -#endif +#else count += 2; data += 2; while (count + 3 < max_count && @@ -508,6 +505,7 @@ clib_count_equal_u64 (u64 * data, uword max_count) data += 4; count += 4; } +#endif while (count < max_count && (data[0] == first)) { data += 1; @@ -522,8 +520,8 @@ clib_count_equal_u32 (u32 * data, uword max_count) uword count; u32 first; - if (max_count == 1) - return 1; + if (max_count <= 1) + return max_count; if (data[0] != data[1]) return 1; @@ -532,41 +530,35 @@ clib_count_equal_u32 (u32 * data, uword max_count) #if defined(CLIB_HAVE_VEC256) u32x8 splat = u32x8_splat (first); - while (1) + while (count + 7 < max_count) { u64 bmp; bmp = u8x32_msb_mask ((u8x32) (u32x8_load_unaligned (data) == splat)); if (bmp != 0xffffffff) { count += count_trailing_zeros (~bmp) / 4; - return clib_min (count, max_count); + return count; } data += 8; count += 8; - - if (count >= max_count) - return max_count; } #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK) u32x4 splat = u32x4_splat (first); - while (1) + while (count + 3 < max_count) { u64 bmp; bmp = u8x16_msb_mask ((u8x16) (u32x4_load_unaligned (data) == splat)); if (bmp != 0xffff) { count += count_trailing_zeros (~bmp) / 4; - return clib_min (count, max_count); + return count; } data += 4; count += 4; - - if (count >= max_count) - return max_count; } -#endif +#else count += 2; data += 2; while (count + 3 < max_count && @@ -576,6 +568,7 @@ clib_count_equal_u32 (u32 * data, uword max_count) data += 4; count += 4; } +#endif while (count < max_count && (data[0] == first)) { data += 1; @@ -590,8 +583,8 @@ clib_count_equal_u16 (u16 * data, uword max_count) uword count; u16 first; - if (max_count == 1) - return 1; + if (max_count <= 1) + return max_count; if (data[0] != data[1]) return 1; @@ -600,41 +593,35 @@ clib_count_equal_u16 (u16 * data, uword max_count) #if defined(CLIB_HAVE_VEC256) u16x16 splat = u16x16_splat (first); - while (1) + 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 clib_min (count, max_count); + return count; } data += 16; count += 16; - - if (count >= max_count) - return max_count; } #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK) u16x8 splat = u16x8_splat (first); - while (1) + 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 clib_min (count, max_count); + return count; } data += 8; count += 8; - - if (count >= max_count) - return max_count; } -#endif +#else count += 2; data += 2; while (count + 3 < max_count && @@ -644,6 +631,7 @@ clib_count_equal_u16 (u16 * data, uword max_count) data += 4; count += 4; } +#endif while (count < max_count && (data[0] == first)) { data += 1; @@ -658,8 +646,8 @@ clib_count_equal_u8 (u8 * data, uword max_count) uword count; u8 first; - if (max_count == 1) - return 1; + if (max_count <= 1) + return max_count; if (data[0] != data[1]) return 1; @@ -668,41 +656,35 @@ clib_count_equal_u8 (u8 * data, uword max_count) #if defined(CLIB_HAVE_VEC256) u8x32 splat = u8x32_splat (first); - while (1) + while (count + 31 < max_count) { u64 bmp; bmp = u8x32_msb_mask ((u8x32) (u8x32_load_unaligned (data) == splat)); if (bmp != 0xffffffff) { count += count_trailing_zeros (~bmp); - return clib_min (count, max_count); + return max_count; } data += 32; count += 32; - - if (count >= max_count) - return max_count; } #elif defined(CLIB_HAVE_VEC128) && defined(CLIB_HAVE_VEC128_MSB_MASK) u8x16 splat = u8x16_splat (first); - while (1) + while (count + 15 < max_count) { u64 bmp; bmp = u8x16_msb_mask ((u8x16) (u8x16_load_unaligned (data) == splat)); if (bmp != 0xffff) { count += count_trailing_zeros (~bmp); - return clib_min (count, max_count); + return count; } data += 16; count += 16; - - if (count >= max_count) - return max_count; } -#endif +#else count += 2; data += 2; while (count + 3 < max_count && @@ -712,6 +694,7 @@ clib_count_equal_u8 (u8 * data, uword max_count) data += 4; count += 4; } +#endif while (count < max_count && (data[0] == first)) { data += 1; |