Function: _>>=_
Section: symbolic_operators
C-Name: gshiftre
Prototype: &L
Help: x>>=y: shortcut for x=x>>y.
Description:
(*small, small):small:parens $1 >>= $(2)
(*int, small):int:parens $1 = shifti($1, -$(2))
(*mp, small):mp:parens $1 = mpshift($1, -$(2))
(*gen, small):mp:parens $1 = gshift($1, -$(2))