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Commits on Feb 4, 2017

• Add an acc test file.

  LucasSloan

  committed
  44553fc

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• Create 2 implementations of the dct, a cpu/simd implementation and a gpu/acc implementation.

  LucasSloan

  committed
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• Reconfigure the test runner to accept a command line argument number of benchmark iterations to run.

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  committed
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Commits on Jan 31, 2017

• Add an unoptimized DCT implementation, in preparation to use it for openacc testing.

  LucasSloan

  committed
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• Format the DCT test file.

  LucasSloan

  committed
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Commits on Jan 28, 2017

• Load all 8 cos values into one register, then broadcast each one into another register to avoid 7/8 cos value memory fetches.

  LucasSloan

  committed
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• Switch to using version 6 of gcc.

  LucasSloan

  committed
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• Remove some unused array declarations.

  LucasSloan

  committed
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• Unroll the inner DCT loop, allowing half as many loads of the acosval table to take place.

  LucasSloan

  committed
  53f29b5

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• Add a simple python program for visualizing the acos table.

  LucasSloan

  committed
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• Cache the cos values times the a values, saving 3 multiplies in the inner loop and 3 avx registers.

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Commits on Jan 19, 2017

• Initialize variables to zero.

  LucasSloan

  committed
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• Rearrange whitespace to clarify what we're collecting timings for.

  LucasSloan

  committed
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• Refactor convert file to return a struct of timings instead of printing them, so that test.c can collect data accross all the benchmarking runs.

  LucasSloan

  committed
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• Move running the dct into its own function.

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  committed
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• Move writing the file into its own function.

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  committed
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• Move generating the huffman tables into their own function.

  LucasSloan

  committed
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• Format jpeg.h

  LucasSloan

  committed
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Commits on Jan 18, 2017

• Remove a bunch of duplicate files, and refactor the code to have a command line runner and a test runner.

  LucasSloan

  committed
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Commits on Jan 11, 2014

• Create README.md

  LucasSloan

  committed
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• Added the AVX quantization and multibit writing to the basic encoder.

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Commits on Jan 7, 2014

• Moved buffer size into a defintion for non-magicness and easier testing of optimal buffer size.

  LucasSloan

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Commits on Jan 6, 2014

• Multibit writer now functioning.

  LucasSloan

  committed
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Commits on Jan 5, 2014

• Found off by two error in multibitwriter.

  LucasSloan

  committed
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• Commiting midway through testing improve bit writing.

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  committed
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Commits on Dec 18, 2013

• Added OpenMP pragmas back in, turned on compiler optimization. DCT no longer limiting region.

  LucasSloan

  committed
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• AVX instructions added.

  LucasSloan

  committed
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• Brought computation out of loop, added omp, got 40x speed up.

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  committed
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• Color images now working.

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Commits on Dec 17, 2013

• JPEG encoder working.

  LucasSloan

  committed
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Commits on Dec 15, 2013

• Simple one block JPEG creation works in DCT.

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