[procedure] ash n count

ChezScheme, SLIB, Gauche, Guile: arithmetic shift

This is called arithmetic-shift in some implementations.

SISC have distinct left-shift and right-shift functions, ashl and ashr.

Bigloo also has distinct functions, bit-lsh and bit-rsh.

Chez also has fxsra and fxsll for shifting fixnums.

See also logand, logior, logxor, lognot.