Function: _+_
Section: symbolic_operators
C-Name: gadd
Prototype: GG
Help: x+y: sum of x and y.
Description:
 (lg, 1):small:parens            $(1)
 (small, small):small:parens     $(1) + $(2)
 (lg, small):lg:parens           $(1) + $(2)
 (small, lg):lg:parens           $(1) + $(2)
 (int, small):int                addis($1, $2)
 (small, int):int                addsi($1, $2)
 (int, int):int                  addii($1, $2)
 (real, small):real              addrs($1, $2)
 (small, real):real              addsr($1, $2)
 (real, real):real               addrr($1, $2)
 (mp, real):real                 mpadd($1, $2)
 (real, mp):real                 mpadd($1, $2)
 (mp, mp):mp                     mpadd($1, $2)
 (gen, small):gen                gaddgs($1, $2)
 (small, gen):gen                gaddsg($1, $2)
 (gen, gen):gen                  gadd($1, $2)
