NAME

       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.

       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(3clc) extension is supported.

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       miscVectorFunctions(3clc)

AUTHORS

       The Khronos Group

COPYRIGHT

       Copyright © 2007-2011 The Khronos Group Inc.
       Permission is hereby granted, free of charge, to any person obtaining a copy of this
       software and/or associated documentation files (the "Materials"), to deal in the Materials
       without restriction, including without limitation the rights to use, copy, modify, merge,
       publish, distribute, sublicense, and/or sell copies of the Materials, and to permit
       persons to whom the Materials are furnished to do so, subject to the condition that this
       copyright notice and permission notice shall be included in all copies or substantial
       portions of the Materials.

NOTES

        1. OpenCL Specification
           page 282, section 6.12.12 Miscellaneous Vector Functions