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The `(gdb)`

module provides several functions for performing
arithmetic on `<gdb:value>`

objects.
The arithmetic is performed as if it were done by the target,
and therefore has target semantics which are not necessarily
those of Scheme. For example operations work with a fixed precision,
not the arbitrary precision of Scheme.

Wherever a function takes an integer or pointer as an operand, GDB will convert appropriate Scheme values to perform the operation.

Scheme Procedure: **value-add** *a b*

Scheme Procedure: **value-sub** *a b*

Scheme Procedure: **value-mul** *a b*

Scheme Procedure: **value-div** *a b*

Scheme Procedure: **value-rem** *a b*

Scheme Procedure: **value-mod** *a b*

Scheme Procedure: **value-pow** *a b*

Scheme Procedure: **value-not** *a*

Scheme Procedure: **value-neg** *a*

Scheme Procedure: **value-pos** *a*

Scheme Procedure: **value-abs** *a*

Scheme Procedure: **value-lsh** *a b*

Scheme Procedure: **value-rsh** *a b*

Scheme Procedure: **value-min** *a b*

Scheme Procedure: **value-max** *a b*

Scheme Procedure: **value-lognot** *a*

Scheme Procedure: **value-logand** *a b*

Scheme Procedure: **value-logior** *a b*

Scheme Procedure: **value-logxor** *a b*

Scheme Procedure: **value=?** *a b*

Scheme Procedure: **value<?** *a b*

Scheme Procedure: **value<=?** *a b*

Scheme Procedure: **value>?** *a b*

Scheme Procedure: **value>=?** *a b*

Scheme does not provide a `not-equal`

function,
and thus Guile support in GDB does not either.

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