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• #14605 stratova veterán Balala2007 #14603

  Új Válasz 2015-03-20 01:08:48 #14605

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  stratova

  veterán

  válasz Balala2007 #14603 üzenetére

  Köszi az infót!

  Eszerint az alábbiak kerültek ki Zen-ből BDver4-hez (Excavator) képest:
  CpuXOP
  CpuLWP
  CpuTBM

  Kapcsolódó cikk:

  AMD explicitly revealed in the description of the patch to the GNU Binutils package that “Zen”, its third-generation x86-64 architecture in its first iteration (znver1 – Zen, version 1), will not support TBM, FMA4, XOP and LWP instructions developed specifically for the “Bulldozer” family of micro-architectures.
  ...
  While FMA4 and XOP could boost performance in gaming, HPC and multimedia applications, a promising thing that will be missed by numerous programmers is LWP, or lightweight profiling.

  The lightweight profiling was developed to enable code to make dynamic and real-time decisions about how best to improve the performance of simultaneously running tasks, using techniques such as memory organization and code layout, with very little overhead. The LWP is a set of hardware features in AMD “Bulldozer” processors, which should be considered when designing applications.

  AMD did not comment on the new-story.

  TBM (Trailing Bit Manipulation)

  TBM consists of instructions complementary to the instruction set started by BMI1; their complementary nature means they do not necessarily need to be used directly but can be generated by an optimizing compiler when supported.[12] AMD introduced TBM together with BMI1 in its Piledriver[5] line of processors; AMD Jaguar processors do not support TBM.

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