logical shift operators in guile?

[steve tell]

Does guile (1.8.x, or any version) have the integer logical shift 
operators, like C's << and >> ?


While searching for those, I realized that what I was trying to do was 
represent small sets of booleans as the bits of an integer... and that 
somthing similar could be done in a more scheme-like fashion with 
bitvectors.

But is there any way to copy the contents of bitvector a to another 
bitvector b of the same size, short of iterating over the elements?


thanks,
Steve