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Les articles publiés sur le site

• arm : Update the var2 functions to the new signature

  29 mai 2017, par Martin Storsjö

  arm: Update the var2 functions to the new signature
  
  The existing functions could easily be used by just calling them
  twice - this would give the following cycle numbers from checkasm:
  
               Cortex A7     A8     A9   A53
  var2_8x8_c:       7302   5342   5050  4400
  var2_8x8_neon:    2645   1612   1932  1715
  var2_8x16_c:     14300  10528  10020  8637
  var2_8x16_neon:   5127   2695   3217  2651
  
  However, by merging both passes into the same function, we get the
  following speedup:
  var2_8x8_neon:    2312   1190   1389  1300
  var2_8x16_neon:   4862   2130   2293  2422
  

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

• x86 : AVX-512 mbtree_propagate_list

  28 mai 2017, par Henrik Gramner

  x86: AVX-512 mbtree_propagate_list
  
  Uses gathers and scatters in combination with conflict detections to
  vectorize the scalar part.
  
  Also improve the checkasm test to try different mb_y values and check
  for out-of-bounds writes.
  

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

• x86 : Avoid self-relative expressions on macho64

  23 mai 2017, par Henrik Gramner

  x86: Avoid self-relative expressions on macho64
  
  Functions that uses self-relative expressions in the form of [foo-$$]
  appears to cause issues on 64-bit Mach-O systems when assembled with nasm.
  Temporarily disable those functions on macho64 for the time being until
  we've figured out the root cause.
  

  • [DH] common/bitstream.c
  • [DH] common/pixel.c
  • [DH] common/quant.c
  • [DH] encoder/cabac.c
  • [DH] encoder/rdo.c

• configure : Don't try to detect clang by $CC

  22 mai 2017, par Anton Mitrofanov

  configure: Don't try to detect clang by $CC
  
  Only check if option -Werror=unknown-warning-option is supported before adding it
  

  • [DH] configure

• x86 : Fix linking with 8-bit depth shared libx264

  22 mai 2017, par Anton Mitrofanov

  x86: Fix linking with 8-bit depth shared libx264
  

  • [DH] common/x86/cabac-a.asm