vec_step
vec_step
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3
vec_step Takes a built-in scalar or vector data type argument and returns an integer value representing the number of elements in the scalar or vector.

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int `vec_step` gentypen a int `vec_step` char3 a int `vec_step` uchar3 a int `vec_step` short3 a int `vec_step` ushort3 a int `vec_step` half3 a int `vec_step` int3 a int `vec_step` uint3 a int `vec_step` long3 a int `vec_step` ulong3 a int `vec_step` float3 a int `vec_step` double3 a int `vec_step` type

## Description

The `vec_step` built-in function takes a built-in scalar or vector data type argument and returns an integer value representing the number of elements in the scalar or vector.

For all scalar types, `vec_step` returns 1.

The `vec_step` built-in functions that take a 3-component vector return 4.

`vec_step` may also take a pure type as an argument, e.g. `vec_step`(float2)

We use the generic type name gentypen (or gentypem) to indicate the built-in data types char{2|4|8|16}, uchar{2|4|8|16}, short{2|4|8|16}, ushort{2|4|8|16}, int{2|4|8|16}, uint{2|4|8|16}, long{2|4|8|16}, ulong{2|4|8|16}, or float{2|4|8|16} as the type for the arguments unless otherwise stated. We use the generic name ugentypen to indicate the built-in unsigned integer data types. If the double is supported, then gentypen (or gentypem) also indicate the built-in data types double{2|4|8|16}.

The generic type name gentypen (or gentypem) may indicate the data type half{2|4|8|16} if the cl_khr_fp16 extension is supported.

## Specification

OpenCL Specification

## Also see

Miscellaneous Vector Functions

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