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Microoptimization

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master
Inga 🏳‍🌈 8 years ago
parent bbc7761333
commit a41a57b0e4
2 changed files with 13 additions and 13 deletions
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  1. 20
      dotnet/WhiteRabbit.UnmanagedBridge/md5.cpp
  2. 6
      dotnet/WhiteRabbit/PhraseSet.cs

20
dotnet/WhiteRabbit.UnmanagedBridge/md5.cpp
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@ -81,18 +81,16 @@ _mm256_set_epi32( \
input[offset + 8 * 8]) \ input[offset + 8 * 8]) \
) )
#define PERMUTE_MASK 85
#define WRITE_TO_OUTPUT(a, output, expected) \ #define WRITE_TO_OUTPUT(a, output, expected) \
output[0] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 0 * PERMUTE_MASK))); \ output[0] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 0 * 0x55))); \
output[1] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 1 * PERMUTE_MASK))); \ output[1] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 0 * 0x55))); \
output[2] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 2 * PERMUTE_MASK))); \ output[2] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 1 * 0x55))); \
output[3] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 3 * PERMUTE_MASK))); \ output[3] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 1 * 0x55))); \
output[4] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 0 * PERMUTE_MASK))); \ output[4] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 2 * 0x55))); \
output[5] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 1 * PERMUTE_MASK))); \ output[5] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 2 * 0x55))); \
output[6] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 2 * PERMUTE_MASK))); \ output[6] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 3 * 0x55))); \
output[7] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 3 * PERMUTE_MASK))); \ output[7] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 3 * 0x55))); \
output[8] = _mm256_movemask_epi8(_mm256_or_si256(*((__m256i*)output), _mm256_slli_epi16(*((__m256i*)output), 4))); output[8] = _mm256_movemask_epi8(_mm256_cmpeq_epi8(*((__m256i*)output), _mm256_setzero_si256()));
#elif SIMD #elif SIMD

6
dotnet/WhiteRabbit/PhraseSet.cs
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@ -55,11 +55,13 @@
MD5Unmanaged.ComputeMD5(bufferPointer, expectedHashesPointer); MD5Unmanaged.ComputeMD5(bufferPointer, expectedHashesPointer);
if (bufferPointer[Constants.PhrasesPerSet / 2] != 0) if (bufferPointer[Constants.PhrasesPerSet / 2] != 0xFFFFFFFF)
{ {
for (var j = 0; j < Constants.PhrasesPerSet; j++) for (var j = 0; j < Constants.PhrasesPerSet; j++)
{ {
var match = (bufferPointer[j / 2] >> (4 * (j % 2))) & 0xF0F0F0F; // 16 matches are packed in 8 32-bit numbers: [0,1], [8,9], [2,3], [10,11], [4, 5], [12, 13], [6, 7], [14, 15]
var position = ((j / 2) % 4) * 2 + (j / 8);
var match = (bufferPointer[position] >> (4 * (j % 2))) & 0xF0F0F0F;
if (match != 0) if (match != 0)
{ {
var bufferInfo = ((ulong)bufferPointer[Constants.PhrasesPerSet] << 32) | bufferPointer[j]; var bufferInfo = ((ulong)bufferPointer[Constants.PhrasesPerSet] << 32) | bufferPointer[j];

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