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Les articles publiés sur le site

• x86 : Update intel compiler cpu dispatcher override for new versions of ICC/ICL

  15 décembre 2014, par Anton Mitrofanov

  x86: Update intel compiler cpu dispatcher override for new versions of ICC/ICL
  

  • [DH] common/cpu.h
  • [DH] common/osdep.c
  • [DH] common/x86/cpu-a.asm
  • [DH] configure
  • [DH] encoder/encoder.c
  • [DH] extras/intel_dispatcher.h

• x86 : SSSE3 and AVX2 implementations of plane_copy_swap

  1er décembre 2014, par Henrik Gramner

  x86: SSSE3 and AVX2 implementations of plane_copy_swap
  
  For NV21 input.
  

  • [DH] common/x86/mc-a2.asm
  • [DH] common/x86/mc-c.c

• x86 : SSE and AVX implementations of plane_copy

  28 novembre 2014, par Henrik Gramner

  x86: SSE and AVX implementations of plane_copy
  
  Also remove the MMX2 implementation and fix src overread for height == 1.
  

  • [DH] common/frame.c
  • [DH] common/x86/mc-a2.asm
  • [DH] common/x86/mc-c.c

• aarch64 : cabac_encode_{decision,bypass,terminal}_asm

  19 novembre 2014, par Janne Grunau

  aarch64: cabac_encode_{decision,bypass,terminal}_asm
  
  benchmarks on a Nexus 9 (nvidia denver):
  101.3 cycles in x264_cabac_encode_decision_c,   67105369 runs, 3495 skips
   97.3 cycles in x264_cabac_encode_decision_asm, 67105493 runs, 3371 skips
  132.8 cycles in x264_cabac_encode_terminal_c,    1046950 runs, 1626 skips
  116.1 cycles in x264_cabac_encode_terminal_asm,  1048424 runs, 152 skips
   92.4 cycles in x264_cabac_encode_bypass_c,     16776192 runs, 1024 skips
   89.6 cycles in x264_cabac_encode_bypass_asm,   16776453 runs, 763 skips
  
  Cycle counts are not as stable as one would like. The dynamic code
  optimisation seems to produce different results for small chnages in a
  binary. Repeated runs with the same binary produce stable results
  though (ignoring the first run).
  

  • [DH] Makefile
  • [DH] common/aarch64/asm-offsets.c
  • [DH] common/aarch64/asm-offsets.h
  • [DH] common/aarch64/cabac-a.S
  • [DH] common/cabac.h
  • [DH] tools/checkasm.c

• checkasm : add cycle counter read for aarch64

  6 novembre 2014, par Janne Grunau

  checkasm: add cycle counter read for aarch64
  
  Needs kernel support since user space access to the cycle counter is not
  allowed on all available AArch64 systems (Android 5 and iOS).
  

  • [DH] tools/checkasm.c