• d-bugmail puremagic.com (21/21) Apr 02 2013 http://d.puremagic.com/issues/show_bug.cgi?id=9860

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=9860

           Summary: Shifting a vector by a scalar value should be allowed
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: kai redstar.de



SSE2 has the PSLLW, PSRLW and PSRAW instruction family. Thus the shift
operators <<, >> and >>> can be implemented for vectors in terms of these
instructions.

This is an useful extension because cryptographic algorithm require a shift
operation very often (e.g. see the vectorized version of SHA1).

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