scale to 3/4 or 3/8 with odd width destinations efficiently.  previously if width was not multiple of what the simd loop would do (24), scaling would fall back on slower C code.  This change allows SIMD to be used for most of the scaling and C for the remainder, improving efficiency.
BUG=314
TESTED=set LIBYUV_WIDTH=1896 & ScaleDownBy3by4_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48249004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1380 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49769004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1378 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=425
TESTED=out\release\libyuv_unittest_old --gtest_filter=*.ScaleDownBy3_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/45219004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1377 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=422
TESTED=untested
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/43229004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1374 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=427
TESTED=out\release\libyuv_unittest --gtest_filter=*.ScaleDownBy4_*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/51689004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1373 16f28f9a-4ce2-e073-06de-1de4eb20be90

lsl by 2 requires a number sign for xcode on ios 64 bit build.  add the # sign for ios compatibility.  remove legacy x86 asm files that are unused.  the unused files cause complications in build systems that build all files.
BUG=libyuv:423
TESTED=try bots
R=noahric@google.com

Review URL: https://webrtc-codereview.appspot.com/45119004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1369 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=426
TESTED=untested

Review URL: https://webrtc-codereview.appspot.com/48079004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1368 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=try bots

Review URL: https://webrtc-codereview.appspot.com/45999004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1366 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=422
TESTED=local vs2013 build still passes.

Review URL: https://webrtc-codereview.appspot.com/45959004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1365 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=393
TESTED=sde -ast -hsw -- out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*I422ToARGB*

Review URL: https://webrtc-codereview.appspot.com/48019004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1364 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=421
TESTED=out\release\libyuv_unittest --gtest_filter=*ARGB4444ToARGB*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48009004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1363 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=421
TESTED=out\release\libyuv_unittest --gtest_filter=*RGB565ToARGB*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/51549004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1362 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=421
TESTED=out\release\libyuv_unittest --gtest_filter=*RGB565ToARGB*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/49609004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1357 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=420
TESTED=d:/src/nacl_sdk/pepper_canary/toolchain/win_arm_newlib/bin/arm-nacl-g++ -o newlib/Release/source/scale_neon_arm.o -c source/scale_neon.cc -g -O2 -pthread -MMD -DNDEBUG  -Id:/src/nacl_sdk/pepper_canary/include -Id:/src/nacl_sdk/pepper_canary/include/newlib  -I./include
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/47949004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1356 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=lint
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48839004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1354 16f28f9a-4ce2-e073-06de-1de4eb20be90

scale to half size optimization for avx2 - use pmaddubsw instruction to horizontally add bytes, then pavgw to round and divide by 2.
BUG=314
TESTED=libyuvTest.ScaleDownBy2*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/45909004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1352 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=314
TESTED=out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*.ScaleDownBy2*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/44959004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1349 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=314
TESTED=out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*.ScaleDownBy2*
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/50529004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1348 16f28f9a-4ce2-e073-06de-1de4eb20be90

Scale down by 2 AVX2 port.  Processes twice as many pixels as SSE2 and takes advantage of 3 argument instructions to reduce register usage and number of instructions.
BUG=314
TESTED=libyuvTest.ScaleDownBy2_Box
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/42959004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1347 16f28f9a-4ce2-e073-06de-1de4eb20be90

All cpu flags to be set so that instead of comparing C code, compare assembler to assembler, for benchmarking purposes.
BUG=none
TESTED=libyuv_unittest.exe
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/50499004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1346 16f28f9a-4ce2-e073-06de-1de4eb20be90

Enable assembly for clangcl build on Windows.  Previously assembly was disabled so clangcl would work, but only with C code.  As clangcl mimics both Visual C and GCC, ifdefs need to pick one or the other or often you'll end up with both.  In this CL we disable most Visual C code and use the GCC versions which allow assembly for both 32 and 64 bit intel.
BUG=412
TESTED=clang=1 build on windows
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/51389004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1341 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=I422ToRGB24 unittest
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/46619004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1337 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=414
TESTED=try bots
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/43809004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1334 16f28f9a-4ce2-e073-06de-1de4eb20be90

rename I400 to J400 and I400 reference to I400.  J400 is a simple replication of values to convert to RGB, which is what the old I400 was.  I400 reference is the Y part of the YUV formula, so renaming that to I400.
BUG=none
TESTED=libyuvTest (5925 ms total)
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/50369005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1333 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=411
TESTED=libyuvTest.TestYToARGB
R=bcornell@google.com

Review URL: https://webrtc-codereview.appspot.com/44709004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1330 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=TestRoundToByte
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/41299004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1325 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=412
TESTED=clang=1 for build on windows
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/45679004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1324 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=403
TESTED=I411ToARGB unittest
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/42689004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1321 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=410
TESTED=set LIBYUV_WIDTH=65536 out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=libyuvTest.ScaleTo320x240_None
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/42319004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1320 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=out\release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter=*TestFullYUV
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/47499005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1319 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=407
TESTED=untested
R=brucedawson@google.com, tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/48429004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1315 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=403
TESTED=I444ToARGB unittests
R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/45589004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1314 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=none
TESTED=libyuvTest.TestFullYUV

Review URL: https://webrtc-codereview.appspot.com/45539004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1313 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=409
TESTED=python build\gyp_chromium -fninja -G msvs_version=2010 --depth=. libyuv_test.gyp
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/44569004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1312 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=409
TESTED=try bots
R=harryjin@google.com, johannkoenig@google.com

Review URL: https://webrtc-codereview.appspot.com/43629004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1311 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=407
TESTED=Dither unittests
R=brucedawson@google.com

Review URL: https://webrtc-codereview.appspot.com/46459004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1310 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=407
TESTED=ARGBToRGB565Dither unittest
R=brucedawson@google.com, harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/44519004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1309 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=407
TESTED=ARGBToRGB565Dither unittest
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/41039004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1308 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=407
TESTED=unittest passes
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/43539004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1306 16f28f9a-4ce2-e073-06de-1de4eb20be90

BUG=408
TESTED=nacl arm build
R=harryjin@google.com

Review URL: https://webrtc-codereview.appspot.com/38329004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1305 16f28f9a-4ce2-e073-06de-1de4eb20be90