--- layout: stdlib-reference --- # fdim ## Description Computes max(0, x-y). ## Signature

T fdim<T>(
    T x,
    T y)
    where T : __BuiltinFloatingPointType;

vector<T, N> fdim<T, int N>(
    vector<T, N> x,
    vector<T, N> y)
    where T : __BuiltinFloatingPointType;

## Generic Parameters #### T: [\_\_BuiltinFloatingPointType](../interfaces/0_builtinfloatingpointtype-029hm/index.html) #### N : int ## Parameters #### x : [T](fdim.html#typeparam-T) The first value. #### y : [T](fdim.html#typeparam-T) The second value. #### x : [vector](../types/vector/index.html)\<[T](../types/vector/index.html#typeparam-T), [N](../types/vector/index.html#decl-N)\> The first value. #### y : [vector](../types/vector/index.html)\<[T](../types/vector/index.html#typeparam-T), [N](../types/vector/index.html#decl-N)\> The second value. ## Return value The result of max(0, x-y). ## Availability and Requirements Defined for the following targets: #### hlsl Available in all stages. #### glsl Available in all stages. #### cpp Available in all stages. #### cuda Available in all stages. #### metal Available in all stages. #### spirv Available in all stages. #### llvm Available in all stages.