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Apparent 4 avail bits in SV flags

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Karl Williamson
February 9, 2017 00:29
Apparent 4 avail bits in SV flags
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It looks to me, and others on #p5p that there are 4 unused bits in the 
flags for an SV.

The types take up 4 bits, but then the actual flags, like SVf_IOK, start 
at 0x100.  That apparently means bits  matching the mask 0xF0 are 
available.  Are we wrong?

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