diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/plugins/crypto_native/ghash.h | 126 | ||||
| -rw-r--r-- | src/vppinfra/vector_avx512.h | 15 |
2 files changed, 141 insertions, 0 deletions
diff --git a/src/plugins/crypto_native/ghash.h b/src/plugins/crypto_native/ghash.h index a2886a468e9..abbfd2856f0 100644 --- a/src/plugins/crypto_native/ghash.h +++ b/src/plugins/crypto_native/ghash.h @@ -257,6 +257,132 @@ ghash_mul (u8x16 a, u8x16 b) return ghash_final (gd); } +#ifdef __VPCLMULQDQ__ + +static const u8x64 ghash4_poly2 = { + 0x00, 0x00, 0x00, 0xc2, 0x01, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, + 0x00, 0x00, 0x00, 0xc2, 0x01, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, + 0x00, 0x00, 0x00, 0xc2, 0x01, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, + 0x00, 0x00, 0x00, 0xc2, 0x01, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc2, +}; + +typedef struct +{ + u8x64 hi, lo, mid, tmp_lo, tmp_hi; + int pending; +} ghash4_data_t; + +static_always_inline u8x64 +gmul4_lo_lo (u8x64 a, u8x64 b) +{ + return (u8x64) _mm512_clmulepi64_epi128 ((__m512i) a, (__m512i) b, 0x00); +} + +static_always_inline u8x64 +gmul4_hi_lo (u8x64 a, u8x64 b) +{ + return (u8x64) _mm512_clmulepi64_epi128 ((__m512i) a, (__m512i) b, 0x01); +} + +static_always_inline u8x64 +gmul4_lo_hi (u8x64 a, u8x64 b) +{ + return (u8x64) _mm512_clmulepi64_epi128 ((__m512i) a, (__m512i) b, 0x10); +} + +static_always_inline u8x64 +gmul4_hi_hi (u8x64 a, u8x64 b) +{ + return (u8x64) _mm512_clmulepi64_epi128 ((__m512i) a, (__m512i) b, 0x11); +} + + +static_always_inline void +ghash4_mul_first (ghash4_data_t * gd, u8x64 a, u8x64 b) +{ + gd->hi = gmul4_hi_hi (a, b); + gd->lo = gmul4_lo_lo (a, b); + gd->mid = (gmul4_hi_lo (a, b) ^ gmul4_lo_hi (a, b)); + gd->pending = 0; +} + +static_always_inline void +ghash4_mul_next (ghash4_data_t * gd, u8x64 a, u8x64 b) +{ + u8x64 hi = gmul4_hi_hi (a, b); + u8x64 lo = gmul4_lo_lo (a, b); + + if (gd->pending) + { + /* there is peding data from previous invocation so we can XOR */ + gd->hi = u8x64_xor3 (gd->hi, gd->tmp_hi, hi); + gd->lo = u8x64_xor3 (gd->lo, gd->tmp_lo, lo); + gd->pending = 0; + } + else + { + /* there is no peding data from previous invocation so we postpone XOR */ + gd->tmp_hi = hi; + gd->tmp_lo = lo; + gd->pending = 1; + } + gd->mid = u8x64_xor3 (gd->mid, gmul4_hi_lo (a, b), gmul4_lo_hi (a, b)); +} + +static_always_inline void +ghash4_reduce (ghash4_data_t * gd) +{ + u8x64 r; + + /* Final combination: + gd->lo ^= gd->mid << 64 + gd->hi ^= gd->mid >> 64 */ + + u8x64 midl = u8x64_word_shift_left (gd->mid, 8); + u8x64 midr = u8x64_word_shift_right (gd->mid, 8); + + if (gd->pending) + { + gd->lo = u8x64_xor3 (gd->lo, gd->tmp_lo, midl); + gd->hi = u8x64_xor3 (gd->hi, gd->tmp_hi, midr); + } + else + { + gd->lo ^= midl; + gd->hi ^= midr; + } + + r = gmul4_hi_lo (ghash4_poly2, gd->lo); + gd->lo ^= u8x64_word_shift_left (r, 8); + +} + +static_always_inline void +ghash4_reduce2 (ghash4_data_t * gd) +{ + gd->tmp_lo = gmul4_lo_lo (ghash4_poly2, gd->lo); + gd->tmp_hi = gmul4_lo_hi (ghash4_poly2, gd->lo); +} + +static_always_inline u8x16 +ghash4_final (ghash4_data_t * gd) +{ + u8x64 r; + u8x32 t; + + r = u8x64_xor3 (gd->hi, u8x64_word_shift_right (gd->tmp_lo, 4), + u8x64_word_shift_left (gd->tmp_hi, 4)); + + /* horizontal XOR of 4 128-bit lanes */ + t = u8x64_extract_lo (r) ^ u8x64_extract_hi (r); + return u8x32_extract_hi (t) ^ u8x32_extract_lo (t); +} +#endif + static_always_inline void ghash_precompute (u8x16 H, u8x16 * Hi, int count) { diff --git a/src/vppinfra/vector_avx512.h b/src/vppinfra/vector_avx512.h index e27c7c041e4..efdc78bdc02 100644 --- a/src/vppinfra/vector_avx512.h +++ b/src/vppinfra/vector_avx512.h @@ -113,6 +113,18 @@ u32x16_extract_hi (u32x16 v) return (u32x8) _mm512_extracti64x4_epi64 ((__m512i) v, 1); } +static_always_inline u8x32 +u8x64_extract_lo (u8x64 v) +{ + return (u8x32) _mm512_extracti64x4_epi64 ((__m512i) v, 0); +} + +static_always_inline u8x32 +u8x64_extract_hi (u8x64 v) +{ + return (u8x32) _mm512_extracti64x4_epi64 ((__m512i) v, 1); +} + static_always_inline u32 u32x16_min_scalar (u32x16 v) { @@ -149,6 +161,9 @@ u64x8_permute (u64x8 a, u64x8 b, u64x8 mask) #define u8x64_extract_u8x16(a, n) \ (u8x16) _mm512_extracti64x2_epi64 ((__m512i) (a), n) +#define u8x64_word_shift_left(a,n) (u8x64) _mm512_bslli_epi128((__m512i) a, n) +#define u8x64_word_shift_right(a,n) (u8x64) _mm512_bsrli_epi128((__m512i) a, n) + static_always_inline u8x64 u8x64_xor3 (u8x64 a, u8x64 b, u8x64 c) { |