The
minusp
,
plusp
and
zerop
tests for an int32 object.
The function
int32-minusp
tests whether its argument
x
is int32< than the value of +int32-0+.
The function
int32-plusp
tests whether its argument
x
is int32> than the value of +int32-0+.
The function
int32-zerop
tests whether its argument
x
is int32= to the value of +int32-0+.
See the section Fast 32-bit arithmetic for more information about the INT32 API.
LispWorks User Guide and Reference Manual - 21 Dec 2011