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General refactor and cleanup.

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This commit is contained in:
Natalia Portillo
2024-04-30 15:12:48 +01:00
parent 552aa9da02
commit bd5051ce18
48 changed files with 1157 additions and 1290 deletions
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29
crc64_clmul.c
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@@ -56,8 +56,8 @@ static uint64_t div129by65(uint64_t poly)
}
static const uint8_t shuffleMasks[] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88, 0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x8f, 0x8e, 0x8d, 0x8c, 0x8b, 0x8a, 0x89, 0x88, 0x87, 0x86, 0x85, 0x84, 0x83, 0x82, 0x81, 0x80,
};
TARGET_WITH_CLMUL static void shiftRight128(__m128i in, size_t n, __m128i *outLeft, __m128i *outRight)
@@ -85,10 +85,10 @@ TARGET_WITH_CLMUL static __m128i fold(__m128i in, __m128i foldConstants)
*/
AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const uint8_t *data, long length)
{
const uint64_t k1 = 0xe05dd497ca393ae4; // bitReflect(expMod65(128 + 64, poly, 1)) << 1;
const uint64_t k2 = 0xdabe95afc7875f40; // bitReflect(expMod65(128, poly, 1)) << 1;
const uint64_t mu = 0x9c3e466c172963d5; // (bitReflect(div129by65(poly)) << 1) | 1;
const uint64_t p = 0x92d8af2baf0e1e85; // (bitReflect(poly) << 1) | 1;
const uint64_t k1 = 0xe05dd497ca393ae4; // bitReflect(expMod65(128 + 64, poly, 1)) << 1;
const uint64_t k2 = 0xdabe95afc7875f40; // bitReflect(expMod65(128, poly, 1)) << 1;
const uint64_t mu = 0x9c3e466c172963d5; // (bitReflect(div129by65(poly)) << 1) | 1;
const uint64_t p = 0x92d8af2baf0e1e85; // (bitReflect(poly) << 1) | 1;
const __m128i foldConstants1 = _mm_set_epi64x(k2, k1);
const __m128i foldConstants2 = _mm_set_epi64x(p, mu);
@@ -124,8 +124,8 @@ AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const
shiftRight128(data0, leadOutSize, &A, &B);
const __m128i P = _mm_xor_si128(A, crc0);
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10),
_mm_xor_si128(_mm_srli_si128(P, 8), _mm_slli_si128(crc1, 8)));
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10),
_mm_xor_si128(_mm_srli_si128(P, 8), _mm_slli_si128(crc1, 8)));
}
else if(alignedLength == 2)
{
@@ -142,8 +142,8 @@ AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const
shiftRight128(data1, leadOutSize, &C, &D);
const __m128i P = _mm_xor_si128(_mm_xor_si128(B, C), crc0);
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10),
_mm_xor_si128(_mm_srli_si128(P, 8), _mm_slli_si128(crc1, 8)));
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10),
_mm_xor_si128(_mm_srli_si128(P, 8), _mm_slli_si128(crc1, 8)));
}
else
{
@@ -156,7 +156,7 @@ AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const
shiftRight128(_mm_xor_si128(data1, crc1), leadOutSize, &C, &D);
const __m128i P = _mm_xor_si128(fold(A, foldConstants1), _mm_xor_si128(B, C));
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10), _mm_srli_si128(P, 8));
R = _mm_xor_si128(_mm_clmulepi64_si128(P, foldConstants1, 0x10), _mm_srli_si128(P, 8));
}
}
else
@@ -179,8 +179,7 @@ AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const
}
__m128i P;
if(length == 16)
{ P = _mm_xor_si128(accumulator, _mm_load_si128(alignedData)); }
if(length == 16) { P = _mm_xor_si128(accumulator, _mm_load_si128(alignedData)); }
else
{
const __m128i end0 = _mm_xor_si128(accumulator, _mm_load_si128(alignedData));
@@ -199,9 +198,7 @@ AARU_EXPORT TARGET_WITH_CLMUL uint64_t AARU_CALL crc64_clmul(uint64_t crc, const
// Final Barrett reduction
const __m128i T1 = _mm_clmulepi64_si128(R, foldConstants2, 0x00);
const __m128i T2 =
_mm_xor_si128(
_mm_xor_si128(_mm_clmulepi64_si128(T1, foldConstants2, 0x10), _mm_slli_si128(T1, 8)),
R);
_mm_xor_si128(_mm_xor_si128(_mm_clmulepi64_si128(T1, foldConstants2, 0x10), _mm_slli_si128(T1, 8)), R);
#if defined(_WIN64)
return ~_mm_extract_epi64(T2, 1);