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Les articles publiés sur le site

• Fix p4x4 RDO with CAVLC

  22 mai 2016, par Anton Mitrofanov

  Fix p4x4 RDO with CAVLC
  

  • [DH] encoder/cavlc.c

• arm : Add asm for mbtree fixed point conversion

  24 avril 2016, par Janne Grunau

  arm: Add asm for mbtree fixed point conversion
  
  7-8 times faster on a cortex-a53 vs. gcc-5.3.
  
  mbtree_fix8_pack_c: 44114
  mbtree_fix8_pack_neon: 5805
  mbtree_fix8_unpack_c: 38924
  mbtree_fix8_unpack_neon: 4870
  

  • [DH] common/arm/mc-a.S
  • [DH] common/arm/mc-c.c

• aarch64 : Add asm for mbtree fixed point conversion

  24 avril 2016, par Janne Grunau

  aarch64: Add asm for mbtree fixed point conversion
  
  pack is ~7 times faster and unpack is ~9 times faster on a cortex-a53
  compared to gcc-5.3.
  
  mbtree_fix8_pack_c: 41534
  mbtree_fix8_pack_neon: 5766
  mbtree_fix8_unpack_c: 44102
  mbtree_fix8_unpack_neon: 4868
  

  • [DH] common/aarch64/mc-a.S
  • [DH] common/aarch64/mc-c.c

• configure : Add link-time optimization support

  24 avril 2016, par Henrik Gramner

  configure: Add link-time optimization support
  
  Enabled by using the --enable-lto configuration option.
  
  May give a slight performance improvement in some cases, but it can
  also reduce performance in other cases (largely compiler-dependant)
  so don't enable it by default. It also makes compilation (and linking
  in particular) a fair bit slower.
  
  Note that some older versions of GNU binutils will incorrectly warn
  about "memset used with constant zero length parameter" when linking
  using LTO. This is due to a bug in binutils and can safely be ignored.
  

  • [DH] configure

• configure : Fix clang detection with versioned binaries

  24 avril 2016, par Henrik Gramner

  configure: Fix clang detection with versioned binaries
  
  Correctly detect clang binaries that has the version number appended
  as a suffix to the file name, e.g. `clang38`.
  

  • [DH] configure