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• x86inc : Fix AVX emulation of scalar float instructions

  4 mars 2016, par Henrik Gramner

  x86inc: Fix AVX emulation of scalar float instructions
  
  Those instructions are not commutative since they only change the first
  element in the vector and leave the rest unmodified.
  

  • [DH] common/x86/x86inc.asm

• x86 : dct2x4dc asm

  27 février 2016, par Henrik Gramner

  x86: dct2x4dc asm
  
  Only used in 4:2:2. MMX2 version implemented for 8-bit, SSE2 and AVX
  versions implemented for high bit-depth.
  
  2.5x faster on 32-bit and 1.6x faster on 64-bit compared to C on Ivy Bridge.
  

  • [DH] common/dct.c
  • [DH] common/x86/dct-a.asm
  • [DH] common/x86/dct.h

• x86 : SSE2/AVX idct_dequant_2x4_(dc|dconly)

  20 février 2016, par Henrik Gramner

  x86: SSE2/AVX idct_dequant_2x4_(dc|dconly)
  
  Only used in 4:2:2. Both 8-bit and high bit-depth implemented.
  
  Approximate performance improvement compared to C on Ivy Bridge:
  
                           x86-32  x86-64
  idct_dequant_2x4_dc      2.1x    1.7x
  idct_dequant_2x4_dconly  2.7x    2.0x
  
  Helps more on 32-bit due to the C versions being register starved.
  

  • [DH] common/quant.c
  • [DH] common/x86/quant-a.asm
  • [DH] common/x86/quant.h

• checkasm : Fix idct_dequant_2x4_(dc|dconly) tests

  20 février 2016, par Henrik Gramner

  checkasm: Fix idct_dequant_2x4_(dc|dconly) tests
  
  They used the wrong qp values and the dconly test had the wrong name. This
  was undetected before because there wasn't any assembly implementations.
  

  • [DH] tools/checkasm.c

• checkasm : Disable Windows Error Reporting

  7 février 2016, par Henrik Gramner

  checkasm: Disable Windows Error Reporting
  
  When developing new assembly code it's expected that checkasm may crash,
  and the error reporting dialog popup can be somewhat annoying.
  

  • [DH] tools/checkasm.c