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    • jacob.bramley@arm.com's avatar
      A64: Fix a few simulation inaccuracies. · cf43195d
      jacob.bramley@arm.com authored
        - Return the correct NaN when an invalid operation generates a NaN.
        - When one or more operands are NaN, handle them as the processor
          would, prioritising signalling NaNs and making them quiet.
        - Fix fmadd and related instructions:
           - Fnmadd is fma(-n, m, -a), not -fma(n, m, a).
           - Some common libc implementations incorrectly implement fma for
             zero results, so work around these cases.
        - Replace some unreliable tests.
      
      This patch also adds support for Default-NaN mode, since once all the
      other work was done, it only required a couple of lines of code.
      Default-NaN mode was used for an optimisation in ARM, and it should now
      be possible to apply the same optimisation to A64.
      
      BUG=
      R=jochen@chromium.org
      
      Review URL: https://codereview.chromium.org/199083005
      
      git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19927 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
      cf43195d
  14. 12 Mar, 2014 1 commit
  15. 12 Feb, 2014 1 commit