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6c1d763119
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10 Commits

Author SHA1 Message Date
Pascal Massimino
6c1d763119 avoid Yoda style for comparison 
Change-Id: I8ff9f96951e5e8a619f7132455dd281cbf91aa4d
 2016-01-15 23:52:29 -08:00
Vincent Rabaud
8ce975ac82 SSE optimization for vector mismatch. 
Change-Id: I564b822033b59d86635230f29ed6197e306a2c4f
 2016-01-07 18:23:45 +01:00
Vincent Rabaud
2835089d6a Provide an SSE2 implementation of CombinedShannonEntropy. 
CombinedShannonEntropy takes 30% for lossless compression.
This implementation speeds up the overall process by 2 to 3 %.

Change-Id: I04a71743284c38814fd0726034d51a02b1b6ba8f
 2015-12-11 15:12:19 +01:00
James Zern
4741fac42e dsp/lossless_*sse2: remove some unnecessary inlines 
TransformColor / TransformColorInverse are the top-level function
pointer calls

Change-Id: Ieabdb4005ff3e4f9bb3ebcb140ccb6bef5d28f8b
 2015-06-25 21:02:01 -07:00
Pascal Massimino
1819965e0a fix warning ("left shift of negative value") using a cast 
Change-Id: Ie99e8ff87924a1d15e2c5d83bd9adf07dab04e94
 2015-06-24 23:46:09 -07:00
Pascal Massimino
7017001462 SSE2: speed-up some lossless-encoding functions 
optimized: CollectColorRedTransforms, CollectColorBlueTransforms, SubtractGreenFromBlueAndRed

overall effect is sub-1% speed-up, though.

Change-Id: I9cb49af5c56e4c03db417929b0a2cf575d60a5c6
 2015-06-24 20:09:13 -07:00
Pascal Massimino
fc6c75a2a2 SSE2: 53% faster TransformColor[Inverse] 
Changed the code (again) to process 4 pixels at a time. Loop is more
involved, but overall it's faster.

Removed the SSE4.1 implementation which is now slower than SSE2.

Change-Id: I7734e371033ad8929ace7f7e1373ba930d9bb5f1
 2015-06-23 14:52:01 -07:00
Pascal Massimino
49073da6d6 SSE2: 46% speed-up of TransformColor[Inverse] 
Change-Id: If3bf26dc8ed32a7c03cb438e5d5fc996e2e96b5e
 2015-06-23 20:09:04 +02:00
James Zern
b44eda3f60 dsp: add DSP_INIT_STUB 
generates a stub function when the specific architecture is not enabled,
exposing a symbol in the module, avoiding a compiler warning

Change-Id: Ia9336e57466a9b5241b85c1c95838e91c9283147
 2015-04-02 23:55:35 -07:00
James Zern
553051f741 dsp/lossless: split enc/dec functions 
adds lossless_enc*.c; reduces the size of the decode-only so: ~78K
w/gcc-4.8.2 on x86_64.

Change-Id: If5e4610b67d05eba5896bc64bab79e9df92b2092
 2015-03-23 22:57:50 -07:00