The zerop test for an int32 object.
zerop
system
int32-zerop x => result
x
An int32 object or an integer of type (signed-byte 32) .
(signed-byte 32)
result
A boolean.
The function int32-zerop tests whether its argument x is int32= to the value of +int32-0+.
int32-zerop
See the section "Fast 32bit arithmetic" in the LispWorks User Guide for more information about the INT32 API.
int32