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android / platform / external / chromium_org / third_party / libjpeg_turbo / 841fff8cddd73c0d6b966902f83bea7ad366bd4b
commit841fff8cddd73c0d6b966902f83bea7ad366bd4b[log] [tgz]
author[email protected] <[email protected]@4ff67af0-8c30-449e-8e8b-ad334ec8d88c>Fri May 23 23:38:59 2014 +0000
committer[email protected] <[email protected]@4ff67af0-8c30-449e-8e8b-ad334ec8d88c>Fri May 23 23:38:59 2014 +0000
treee6fcd3fcd0400cbd15dff946aaf9e46e82bafbef
parent3395bcc26e390d2960d15020d4a4d27ae0c122fe [diff]
Update libjpeg_turbo to use clz for bitcounting on ARM

Cherry-picked r1220 from upstream:
Use clz/bsr instructions on ARM for bit counting rather than the lookup table (reduces memory footprint and can improve performance in some cases.)

Upstream review:
http://sourceforge.net/p/libjpeg-turbo/patches/57/

Original review:
https://codereview.appspot.com/77480045/

Removing the lookup table saves 64k data for each process that uses jpeg encoding. Benchmarks on a few ARM devices shows encoding performance changes, from a slowdown of 3-4% on some devices, to a speedup of 10-20% on other devices. In average performance improves.

x86 will still use the lookup table because the bsr instruction showed to be slower on some chips.

BUG=
[email protected]

Review URL: https://codereview.appspot.com/97690043

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/libjpeg_turbo@272637 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
3 files changed
tree: e6fcd3fcd0400cbd15dff946aaf9e46e82bafbef
  1. linux/
  2. mac/
  3. simd/
  4. win/
  5. bmp.c
  6. bmp.h
  7. cderror.h
  8. cdjpeg.c
  9. cdjpeg.h
  10. change.log
  11. ChangeLog.txt
  12. cjpeg.c
  13. config.h
  14. djpeg.c
  15. example.c
  16. google.patch
  17. jaricom.c
  18. jcapimin.c
  19. jcapistd.c
  20. jcarith.c
  21. jccoefct.c
  22. jccolext.c
  23. jccolor.c
  24. jcdctmgr.c
  25. jchuff.c
  26. jchuff.h
  27. jcinit.c
  28. jcmainct.c
  29. jcmarker.c
  30. jcmaster.c
  31. jcomapi.c
  32. jconfig.h
  33. jcparam.c
  34. jcphuff.c
  35. jcprepct.c
  36. jcsample.c
  37. jctrans.c
  38. jdapimin.c
  39. jdapistd.c
  40. jdarith.c
  41. jdatadst-tj.c
  42. jdatadst.c
  43. jdatasrc-tj.c
  44. jdatasrc.c
  45. jdcoefct.c
  46. jdcolext.c
  47. jdcolor.c
  48. jdct.h
  49. jddctmgr.c
  50. jdhuff.c
  51. jdhuff.h
  52. jdinput.c
  53. jdmainct.c
  54. jdmarker.c
  55. jdmaster.c
  56. jdmerge.c
  57. jdmrgext.c
  58. jdphuff.c
  59. jdpostct.c
  60. jdsample.c
  61. jdtrans.c
  62. jerror.c
  63. jerror.h
  64. jfdctflt.c
  65. jfdctfst.c
  66. jfdctint.c
  67. jidctflt.c
  68. jidctfst.c
  69. jidctint.c
  70. jidctred.c
  71. jinclude.h
  72. jmemmgr.c
  73. jmemnobs.c
  74. jmemsys.h
  75. jmorecfg.h
  76. jpegcomp.h
  77. jpegint.h
  78. jpeglib.h
  79. jpeglibmangler.h
  80. jpegtran.c
  81. jpegut.c
  82. jpgtest.cxx
  83. jquant1.c
  84. jquant2.c
  85. jsimd.h
  86. jsimd_none.c
  87. jsimddct.h
  88. jutils.c
  89. jversion.h
  90. LGPL.txt
  91. libjpeg.gyp
  92. LICENSE.txt
  93. rdbmp.c
  94. rdcolmap.c
  95. rdgif.c
  96. rdjpgcom.c
  97. rdppm.c
  98. rdrle.c
  99. rdswitch.c
  100. rdtarga.c
  101. README
  102. README-turbo.txt
  103. README.chromium
  104. rrtimer.h
  105. rrutil.h
  106. tjbench.c
  107. tjunittest.c
  108. tjutil.c
  109. tjutil.h
  110. transupp.c
  111. transupp.h
  112. turbojpeg-jni.c
  113. turbojpeg.c
  114. turbojpeg.h
  115. turbojpegl.c
  116. wrbmp.c
  117. wrgif.c
  118. wrjpgcom.c
  119. wrppm.c
  120. wrrle.c
  121. wrtarga.c