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lokinet/crypto/chacha20/dolbeau/u8.h
Jeff Becker c262f8b5e3
bundle relevent libsodium parts
2018-10-23 07:29:37 -04:00

358 lines
18 KiB
C
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#define VEC8_ROT(A, IMM) \
_mm256_or_si256(_mm256_slli_epi32(A, IMM), _mm256_srli_epi32(A, (32 - IMM)))
/* implements a vector quarter round by-the-book (naive!) */
#define VEC8_QUARTERROUND_NAIVE(A, B, C, D) \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = VEC8_ROT(t_##A, 16); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 12); \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = VEC8_ROT(t_##A, 8); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 7)
/* same, but replace 2 of the shift/shift/or "rotation" by byte shuffles (8 &
* 16) (better) */
#define VEC8_QUARTERROUND_SHUFFLE(A, B, C, D) \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = _mm256_shuffle_epi8(t_##A, rot16); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 12); \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = _mm256_shuffle_epi8(t_##A, rot8); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 7)
/* same, but replace 2 of the shift/shift/or "rotation" by byte & word shuffles
* (8 & 16) (not as good as previous) */
#define VEC8_QUARTERROUND_SHUFFLE2(A, B, C, D) \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = _mm256_shufflehi_epi16(_mm256_shufflelo_epi16(t_##A, 0xb1), 0xb1); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 12); \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
t_##A = _mm256_xor_si256(x_##D, x_##A); \
x_##D = _mm256_shuffle_epi8(t_##A, rot8); \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
t_##C = _mm256_xor_si256(x_##B, x_##C); \
x_##B = VEC8_ROT(t_##C, 7)
#define VEC8_QUARTERROUND(A, B, C, D) VEC8_QUARTERROUND_SHUFFLE(A, B, C, D)
#define VEC8_LINE1(A, B, C, D) \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
x_##D = _mm256_shuffle_epi8(_mm256_xor_si256(x_##D, x_##A), rot16)
#define VEC8_LINE2(A, B, C, D) \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
x_##B = VEC8_ROT(_mm256_xor_si256(x_##B, x_##C), 12)
#define VEC8_LINE3(A, B, C, D) \
x_##A = _mm256_add_epi32(x_##A, x_##B); \
x_##D = _mm256_shuffle_epi8(_mm256_xor_si256(x_##D, x_##A), rot8)
#define VEC8_LINE4(A, B, C, D) \
x_##C = _mm256_add_epi32(x_##C, x_##D); \
x_##B = VEC8_ROT(_mm256_xor_si256(x_##B, x_##C), 7)
#define VEC8_ROUND_SEQ(A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, A4, B4, \
C4, D4) \
VEC8_LINE1(A1, B1, C1, D1); \
VEC8_LINE1(A2, B2, C2, D2); \
VEC8_LINE1(A3, B3, C3, D3); \
VEC8_LINE1(A4, B4, C4, D4); \
VEC8_LINE2(A1, B1, C1, D1); \
VEC8_LINE2(A2, B2, C2, D2); \
VEC8_LINE2(A3, B3, C3, D3); \
VEC8_LINE2(A4, B4, C4, D4); \
VEC8_LINE3(A1, B1, C1, D1); \
VEC8_LINE3(A2, B2, C2, D2); \
VEC8_LINE3(A3, B3, C3, D3); \
VEC8_LINE3(A4, B4, C4, D4); \
VEC8_LINE4(A1, B1, C1, D1); \
VEC8_LINE4(A2, B2, C2, D2); \
VEC8_LINE4(A3, B3, C3, D3); \
VEC8_LINE4(A4, B4, C4, D4)
#define VEC8_ROUND_HALF(A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, A4, \
B4, C4, D4) \
VEC8_LINE1(A1, B1, C1, D1); \
VEC8_LINE1(A2, B2, C2, D2); \
VEC8_LINE2(A1, B1, C1, D1); \
VEC8_LINE2(A2, B2, C2, D2); \
VEC8_LINE3(A1, B1, C1, D1); \
VEC8_LINE3(A2, B2, C2, D2); \
VEC8_LINE4(A1, B1, C1, D1); \
VEC8_LINE4(A2, B2, C2, D2); \
VEC8_LINE1(A3, B3, C3, D3); \
VEC8_LINE1(A4, B4, C4, D4); \
VEC8_LINE2(A3, B3, C3, D3); \
VEC8_LINE2(A4, B4, C4, D4); \
VEC8_LINE3(A3, B3, C3, D3); \
VEC8_LINE3(A4, B4, C4, D4); \
VEC8_LINE4(A3, B3, C3, D3); \
VEC8_LINE4(A4, B4, C4, D4)
#define VEC8_ROUND_HALFANDHALF(A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, \
A4, B4, C4, D4) \
VEC8_LINE1(A1, B1, C1, D1); \
VEC8_LINE1(A2, B2, C2, D2); \
VEC8_LINE2(A1, B1, C1, D1); \
VEC8_LINE2(A2, B2, C2, D2); \
VEC8_LINE1(A3, B3, C3, D3); \
VEC8_LINE1(A4, B4, C4, D4); \
VEC8_LINE2(A3, B3, C3, D3); \
VEC8_LINE2(A4, B4, C4, D4); \
VEC8_LINE3(A1, B1, C1, D1); \
VEC8_LINE3(A2, B2, C2, D2); \
VEC8_LINE4(A1, B1, C1, D1); \
VEC8_LINE4(A2, B2, C2, D2); \
VEC8_LINE3(A3, B3, C3, D3); \
VEC8_LINE3(A4, B4, C4, D4); \
VEC8_LINE4(A3, B3, C3, D3); \
VEC8_LINE4(A4, B4, C4, D4)
#define VEC8_ROUND(A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, A4, B4, C4, \
D4) \
VEC8_ROUND_SEQ(A1, B1, C1, D1, A2, B2, C2, D2, A3, B3, C3, D3, A4, B4, C4, \
D4)
if (bytes >= 512) {
/* constant for shuffling bytes (replacing multiple-of-8 rotates) */
__m256i rot16 =
_mm256_set_epi8(13, 12, 15, 14, 9, 8, 11, 10, 5, 4, 7, 6, 1, 0, 3, 2,
13, 12, 15, 14, 9, 8, 11, 10, 5, 4, 7, 6, 1, 0, 3, 2);
__m256i rot8 =
_mm256_set_epi8(14, 13, 12, 15, 10, 9, 8, 11, 6, 5, 4, 7, 2, 1, 0, 3,
14, 13, 12, 15, 10, 9, 8, 11, 6, 5, 4, 7, 2, 1, 0, 3);
uint32_t in12, in13;
/* the naive way seems as fast (if not a bit faster) than the vector way */
__m256i x_0 = _mm256_set1_epi32(x[0]);
__m256i x_1 = _mm256_set1_epi32(x[1]);
__m256i x_2 = _mm256_set1_epi32(x[2]);
__m256i x_3 = _mm256_set1_epi32(x[3]);
__m256i x_4 = _mm256_set1_epi32(x[4]);
__m256i x_5 = _mm256_set1_epi32(x[5]);
__m256i x_6 = _mm256_set1_epi32(x[6]);
__m256i x_7 = _mm256_set1_epi32(x[7]);
__m256i x_8 = _mm256_set1_epi32(x[8]);
__m256i x_9 = _mm256_set1_epi32(x[9]);
__m256i x_10 = _mm256_set1_epi32(x[10]);
__m256i x_11 = _mm256_set1_epi32(x[11]);
__m256i x_12;
__m256i x_13;
__m256i x_14 = _mm256_set1_epi32(x[14]);
__m256i x_15 = _mm256_set1_epi32(x[15]);
__m256i orig0 = x_0;
__m256i orig1 = x_1;
__m256i orig2 = x_2;
__m256i orig3 = x_3;
__m256i orig4 = x_4;
__m256i orig5 = x_5;
__m256i orig6 = x_6;
__m256i orig7 = x_7;
__m256i orig8 = x_8;
__m256i orig9 = x_9;
__m256i orig10 = x_10;
__m256i orig11 = x_11;
__m256i orig12;
__m256i orig13;
__m256i orig14 = x_14;
__m256i orig15 = x_15;
__m256i t_0, t_1, t_2, t_3, t_4, t_5, t_6, t_7, t_8, t_9, t_10, t_11, t_12,
t_13, t_14, t_15;
while (bytes >= 512) {
const __m256i addv12 = _mm256_set_epi64x(3, 2, 1, 0);
const __m256i addv13 = _mm256_set_epi64x(7, 6, 5, 4);
const __m256i permute = _mm256_set_epi32(7, 6, 3, 2, 5, 4, 1, 0);
__m256i t12, t13;
uint64_t in1213;
int i;
x_0 = orig0;
x_1 = orig1;
x_2 = orig2;
x_3 = orig3;
x_4 = orig4;
x_5 = orig5;
x_6 = orig6;
x_7 = orig7;
x_8 = orig8;
x_9 = orig9;
x_10 = orig10;
x_11 = orig11;
x_14 = orig14;
x_15 = orig15;
in12 = x[12];
in13 = x[13];
in1213 = ((uint64_t) in12) | (((uint64_t) in13) << 32);
x_12 = x_13 = _mm256_broadcastq_epi64(_mm_cvtsi64_si128(in1213));
t12 = _mm256_add_epi64(addv12, x_12);
t13 = _mm256_add_epi64(addv13, x_13);
x_12 = _mm256_unpacklo_epi32(t12, t13);
x_13 = _mm256_unpackhi_epi32(t12, t13);
t12 = _mm256_unpacklo_epi32(x_12, x_13);
t13 = _mm256_unpackhi_epi32(x_12, x_13);
/* required because unpack* are intra-lane */
x_12 = _mm256_permutevar8x32_epi32(t12, permute);
x_13 = _mm256_permutevar8x32_epi32(t13, permute);
orig12 = x_12;
orig13 = x_13;
in1213 += 8;
x[12] = in1213 & 0xFFFFFFFF;
x[13] = (in1213 >> 32) & 0xFFFFFFFF;
for (i = 0; i < ROUNDS; i += 2) {
VEC8_ROUND(0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15);
VEC8_ROUND(0, 5, 10, 15, 1, 6, 11, 12, 2, 7, 8, 13, 3, 4, 9, 14);
}
#define ONEQUAD_TRANSPOSE(A, B, C, D) \
{ \
__m128i t0, t1, t2, t3; \
x_##A = _mm256_add_epi32(x_##A, orig##A); \
x_##B = _mm256_add_epi32(x_##B, orig##B); \
x_##C = _mm256_add_epi32(x_##C, orig##C); \
x_##D = _mm256_add_epi32(x_##D, orig##D); \
t_##A = _mm256_unpacklo_epi32(x_##A, x_##B); \
t_##B = _mm256_unpacklo_epi32(x_##C, x_##D); \
t_##C = _mm256_unpackhi_epi32(x_##A, x_##B); \
t_##D = _mm256_unpackhi_epi32(x_##C, x_##D); \
x_##A = _mm256_unpacklo_epi64(t_##A, t_##B); \
x_##B = _mm256_unpackhi_epi64(t_##A, t_##B); \
x_##C = _mm256_unpacklo_epi64(t_##C, t_##D); \
x_##D = _mm256_unpackhi_epi64(t_##C, t_##D); \
t0 = _mm_xor_si128(_mm256_extracti128_si256(x_##A, 0), \
_mm_loadu_si128((__m128i*) (m + 0))); \
_mm_storeu_si128((__m128i*) (c + 0), t0); \
t1 = _mm_xor_si128(_mm256_extracti128_si256(x_##B, 0), \
_mm_loadu_si128((__m128i*) (m + 64))); \
_mm_storeu_si128((__m128i*) (c + 64), t1); \
t2 = _mm_xor_si128(_mm256_extracti128_si256(x_##C, 0), \
_mm_loadu_si128((__m128i*) (m + 128))); \
_mm_storeu_si128((__m128i*) (c + 128), t2); \
t3 = _mm_xor_si128(_mm256_extracti128_si256(x_##D, 0), \
_mm_loadu_si128((__m128i*) (m + 192))); \
_mm_storeu_si128((__m128i*) (c + 192), t3); \
t0 = _mm_xor_si128(_mm256_extracti128_si256(x_##A, 1), \
_mm_loadu_si128((__m128i*) (m + 256))); \
_mm_storeu_si128((__m128i*) (c + 256), t0); \
t1 = _mm_xor_si128(_mm256_extracti128_si256(x_##B, 1), \
_mm_loadu_si128((__m128i*) (m + 320))); \
_mm_storeu_si128((__m128i*) (c + 320), t1); \
t2 = _mm_xor_si128(_mm256_extracti128_si256(x_##C, 1), \
_mm_loadu_si128((__m128i*) (m + 384))); \
_mm_storeu_si128((__m128i*) (c + 384), t2); \
t3 = _mm_xor_si128(_mm256_extracti128_si256(x_##D, 1), \
_mm_loadu_si128((__m128i*) (m + 448))); \
_mm_storeu_si128((__m128i*) (c + 448), t3); \
}
#define ONEQUAD(A, B, C, D) ONEQUAD_TRANSPOSE(A, B, C, D)
#define ONEQUAD_UNPCK(A, B, C, D) \
{ \
x_##A = _mm256_add_epi32(x_##A, orig##A); \
x_##B = _mm256_add_epi32(x_##B, orig##B); \
x_##C = _mm256_add_epi32(x_##C, orig##C); \
x_##D = _mm256_add_epi32(x_##D, orig##D); \
t_##A = _mm256_unpacklo_epi32(x_##A, x_##B); \
t_##B = _mm256_unpacklo_epi32(x_##C, x_##D); \
t_##C = _mm256_unpackhi_epi32(x_##A, x_##B); \
t_##D = _mm256_unpackhi_epi32(x_##C, x_##D); \
x_##A = _mm256_unpacklo_epi64(t_##A, t_##B); \
x_##B = _mm256_unpackhi_epi64(t_##A, t_##B); \
x_##C = _mm256_unpacklo_epi64(t_##C, t_##D); \
x_##D = _mm256_unpackhi_epi64(t_##C, t_##D); \
}
#define ONEOCTO(A, B, C, D, A2, B2, C2, D2) \
{ \
ONEQUAD_UNPCK(A, B, C, D); \
ONEQUAD_UNPCK(A2, B2, C2, D2); \
t_##A = _mm256_permute2x128_si256(x_##A, x_##A2, 0x20); \
t_##A2 = _mm256_permute2x128_si256(x_##A, x_##A2, 0x31); \
t_##B = _mm256_permute2x128_si256(x_##B, x_##B2, 0x20); \
t_##B2 = _mm256_permute2x128_si256(x_##B, x_##B2, 0x31); \
t_##C = _mm256_permute2x128_si256(x_##C, x_##C2, 0x20); \
t_##C2 = _mm256_permute2x128_si256(x_##C, x_##C2, 0x31); \
t_##D = _mm256_permute2x128_si256(x_##D, x_##D2, 0x20); \
t_##D2 = _mm256_permute2x128_si256(x_##D, x_##D2, 0x31); \
t_##A = \
_mm256_xor_si256(t_##A, _mm256_loadu_si256((__m256i*) (m + 0))); \
t_##B = \
_mm256_xor_si256(t_##B, _mm256_loadu_si256((__m256i*) (m + 64))); \
t_##C = \
_mm256_xor_si256(t_##C, _mm256_loadu_si256((__m256i*) (m + 128))); \
t_##D = \
_mm256_xor_si256(t_##D, _mm256_loadu_si256((__m256i*) (m + 192))); \
t_##A2 = _mm256_xor_si256(t_##A2, \
_mm256_loadu_si256((__m256i*) (m + 256))); \
t_##B2 = _mm256_xor_si256(t_##B2, \
_mm256_loadu_si256((__m256i*) (m + 320))); \
t_##C2 = _mm256_xor_si256(t_##C2, \
_mm256_loadu_si256((__m256i*) (m + 384))); \
t_##D2 = _mm256_xor_si256(t_##D2, \
_mm256_loadu_si256((__m256i*) (m + 448))); \
_mm256_storeu_si256((__m256i*) (c + 0), t_##A); \
_mm256_storeu_si256((__m256i*) (c + 64), t_##B); \
_mm256_storeu_si256((__m256i*) (c + 128), t_##C); \
_mm256_storeu_si256((__m256i*) (c + 192), t_##D); \
_mm256_storeu_si256((__m256i*) (c + 256), t_##A2); \
_mm256_storeu_si256((__m256i*) (c + 320), t_##B2); \
_mm256_storeu_si256((__m256i*) (c + 384), t_##C2); \
_mm256_storeu_si256((__m256i*) (c + 448), t_##D2); \
}
ONEOCTO(0, 1, 2, 3, 4, 5, 6, 7);
m += 32;
c += 32;
ONEOCTO(8, 9, 10, 11, 12, 13, 14, 15);
m -= 32;
c -= 32;
#undef ONEQUAD
#undef ONEQUAD_TRANSPOSE
#undef ONEQUAD_UNPCK
#undef ONEOCTO
bytes -= 512;
c += 512;
m += 512;
}
}
#undef VEC8_ROT
#undef VEC8_QUARTERROUND
#undef VEC8_QUARTERROUND_NAIVE
#undef VEC8_QUARTERROUND_SHUFFLE
#undef VEC8_QUARTERROUND_SHUFFLE2
#undef VEC8_LINE1
#undef VEC8_LINE2
#undef VEC8_LINE3
#undef VEC8_LINE4
#undef VEC8_ROUND
#undef VEC8_ROUND_SEQ
#undef VEC8_ROUND_HALF
#undef VEC8_ROUND_HALFANDHALF
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