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14 Commits

Author SHA1 Message Date
DRC
f3a8684cd1 SSE2 SIMD implementation of Huffman encoding 
Full-color compression speedups relative to libjpeg-turbo 1.4.2:

2.8 GHz Intel Xeon W3530, Linux, 64-bit:  2.2-18% (avg. 9.5%)
2.8 GHz Intel Xeon W3530, Linux, 32-bit:  10-25% (avg. 17%)

2.3 GHz AMD A10-4600M APU, Linux, 64-bit:  4.9-17% (avg. 11%)
2.3 GHz AMD A10-4600M APU, Linux, 32-bit:  8.8-19% (avg. 15%)

3.0 GHz Intel Core i7, OS X, 64-bit:  3.5-16% (avg. 10%)
3.0 GHz Intel Core i7, OS X, 32-bit:  4.8-14% (avg. 11%)

2.6 GHz AMD Athlon 64 X2 5050e:
Performance-neutral (give or take a few percent)

Full-color compression speedups relative to IPP:

2.8 GHz Intel Xeon W3530, Linux, 64-bit:  4.8-34% (avg. 19%)
2.8 GHz Intel Xeon W3530, Linux, 32-bit:  -19%-7.0% (avg. -7.0%)

Refer to #42 for discussion.  Numerous other approaches were attempted,
but this one proved to be the most performant across all platforms.

This commit also fixes #3 (works around, really-- the clang-compiled version
of jchuff.c still performs 20% worse than its GCC-compiled counterpart, but
that code is now bypassed by the new SSE2 Huffman algorithm.)

Based on:
2cb4d41330
36c94e050d
 2016-01-12 03:03:49 -06:00
DRC
c641cddb80 AltiVec SIMD implementation of H2V1 and H2V2 plain upsampling (used only when decompressing YCCK images with fast upsampling enabled.) 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1504 632fc199-4ca6-4c93-a231-07263d6284db
 2015-01-14 15:41:11 +00:00
DRC
86af36aebc AltiVec SIMD implementation of H2V1 and H2V2 merged upsampling 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1503 632fc199-4ca6-4c93-a231-07263d6284db
 2015-01-14 13:27:32 +00:00
DRC
52a4ec6c8a AltiVec SIMD implementation of H2V1 and H2V2 fancy upsampling 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1495 632fc199-4ca6-4c93-a231-07263d6284db
 2015-01-13 09:02:29 +00:00
DRC
ac4daa7716 AltiVec SIMD implementation of YCC-to-RGB color conversion 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1489 632fc199-4ca6-4c93-a231-07263d6284db
 2015-01-10 22:56:26 +00:00
DRC
22048207ea AltiVec SIMD implementation of 2x1 and 2x2 downsampling 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1483 632fc199-4ca6-4c93-a231-07263d6284db
 2015-01-08 06:18:33 +00:00
DRC
577ecd93f1 AltiVec SIMD implementation of sample conversion and integer quantization 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1474 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-23 04:14:54 +00:00
DRC
b1fec4ff98 AltiVec SIMD implementation of RGB-to-Grayscale color conversion 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1471 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-22 14:10:33 +00:00
DRC
62bae204f4 AltiVec SIMD implementation of RGB-to-YCC color conversion 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1469 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-22 13:42:26 +00:00
DRC
bf8a5feb79 Cosmetic tweaks to the PowerPC SIMD stubs 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1464 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-22 01:10:11 +00:00
DRC
0691162a8b AltiVec SIMD implementation of slow integer inverse DCT 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1461 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-20 01:17:39 +00:00
DRC
6cb7f40a18 AltiVec SIMD implementation of fast integer inverse DCT 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1445 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-18 10:12:29 +00:00
DRC
fb0c394037 AltiVec SIMD implementation of slow integer forward DCT; Clean up fast integer forward DCT code so that it is easier to see how it derives from the SSE2 code and to make it play more nicely with the slow FDCT code. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1443 632fc199-4ca6-4c93-a231-07263d6284db
 2014-12-17 08:04:39 +00:00
DRC
7affbfc241 The AltiVec code actually works on 32-bit PowerPC platforms as well, so change the "powerpc64" token to "powerpc". Also clean up the shift code, which wasn't building properly on OS X. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1406 632fc199-4ca6-4c93-a231-07263d6284db
 2014-09-05 07:23:12 +00:00