diff options
Diffstat (limited to 'src/vnet/ip/ip_packet.h')
-rwxr-xr-x | src/vnet/ip/ip_packet.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/src/vnet/ip/ip_packet.h b/src/vnet/ip/ip_packet.h index 837b3df8563..04cf9f11d70 100755 --- a/src/vnet/ip/ip_packet.h +++ b/src/vnet/ip/ip_packet.h @@ -149,98 +149,6 @@ STATIC_ASSERT_SIZEOF (ip_ecn_t, 1); extern u8 *format_ip_ecn (u8 * s, va_list * va); -/* IP checksum support. */ - -static_always_inline u16 -ip_csum (void *data, u16 n_left) -{ - u32 sum; -#ifdef CLIB_HAVE_VEC256 - u16x16 v1, v2; - u32x8 zero = { 0 }; - u32x8 sum8 = { 0 }; - u32x4 sum4; -#endif - - /* if there is odd number of bytes, pad by zero and store in sum */ - sum = (n_left & 1) ? ((u8 *) data)[n_left - 1] << 8 : 0; - - /* we deal with words */ - n_left >>= 1; - -#ifdef CLIB_HAVE_VEC256 - while (n_left >= 32) - { - v1 = u16x16_load_unaligned (data); - v2 = u16x16_load_unaligned (data + 32); - -#ifdef CLIB_ARCH_IS_LITTLE_ENDIAN - v1 = u16x16_byte_swap (v1); - v2 = u16x16_byte_swap (v2); -#endif - sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1)); - sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1)); - sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v2)); - sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v2)); - n_left -= 32; - data += 64; - } - - if (n_left >= 16) - { - v1 = u16x16_load_unaligned (data); -#ifdef CLIB_ARCH_IS_LITTLE_ENDIAN - v1 = u16x16_byte_swap (v1); -#endif - sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1)); - sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1)); - n_left -= 16; - data += 32; - } - - if (n_left) - { - v1 = u16x16_load_unaligned (data); -#ifdef CLIB_ARCH_IS_LITTLE_ENDIAN - v1 = u16x16_byte_swap (v1); -#endif - v1 = u16x16_mask_last (v1, 16 - n_left); - sum8 += u32x8_from_u16x8 (u16x16_extract_lo (v1)); - sum8 += u32x8_from_u16x8 (u16x16_extract_hi (v1)); - } - - sum8 = u32x8_hadd (sum8, zero); - sum4 = u32x8_extract_lo (sum8) + u32x8_extract_hi (sum8); - sum += sum4[0] + sum4[1]; - -#else - /* scalar version */ - while (n_left >= 8) - { - sum += clib_net_to_host_u16 (*((u16 *) data + 0)); - sum += clib_net_to_host_u16 (*((u16 *) data + 1)); - sum += clib_net_to_host_u16 (*((u16 *) data + 2)); - sum += clib_net_to_host_u16 (*((u16 *) data + 3)); - sum += clib_net_to_host_u16 (*((u16 *) data + 4)); - sum += clib_net_to_host_u16 (*((u16 *) data + 5)); - sum += clib_net_to_host_u16 (*((u16 *) data + 6)); - sum += clib_net_to_host_u16 (*((u16 *) data + 7)); - n_left -= 8; - data += 16; - } - while (n_left) - { - sum += clib_net_to_host_u16 (*(u16 *) data); - n_left -= 1; - data += 2; - } -#endif - - sum = (sum & 0xffff) + (sum >> 16); - sum = (sum & 0xffff) + (sum >> 16); - return ~((u16) sum); -} - /* Incremental checksum update. */ typedef uword ip_csum_t; |