Function: _>>_
Section: symbolic_operators
C-Name: gshift_right
Prototype: GL
Help: x>>y: compute shift(x,-y).
Description:
 (small, small):small:parens     $(1)>>$(2)
 (int, small):int                shifti($1, -$(2))
 (mp, small):mp                  mpshift($1, -$(2))
 (gen, small):mp                 gshift($1, -$(2))
