NAME

       select - For each component of a vector type, result[i] = if MSB of c[i] is set ? b[i] :
       a[i]. For scalar type, result = c ? b : a.

       gentype select(gentype a, gentype b, igentype c);

       gentype select(gentype a, gentype b, ugentype c);

       halfn select (halfn a, halfn b, shortn c)
       // if half extension enabled

       halfn select (halfn a, halfn b, ushortn c)
       // if half extension enabled

DESCRIPTION

       For each component of a vector type, result[i] = if MSB of c[i] is set ?  b[i] : a[i].

       For scalar type, result = c ?  b : a.

       igentype and ugentype must have the same number of elements and bits as gentype.

NOTES

       The argment type gentype can be char, charn,uchar, ucharn, short, shortn, ushort, ushortn,
       int, intn, uint, uintn, long, longn, ulong, ulongn, float, floatn, double, and doublen.

       The argument type igentype refers to signed integer types, i.e.  char, charn, short,
       shortn, int, intn, long, and longn.

       The argument type ugentype refers to unsigned integer types, i.e.  uchar, ucharn, ushort,
       ushortn, uint, uintn, ulong, and ulongn.  n is 2, 3, 4, 8, or 16.

       If an implementation extends this specification to support IEEE-754 flags or exceptions,
       then all built-in relational functions shall proceed without raising the invalid
       floating-point exception when one or more of the operands are NaNs.

       The built-in relational functions are extended with cl_khr_fp16(3clc) to include
       appropriate versions of functions that take half, and half{2|3|4|8|16} as arguments and
       return values.

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       relationalFunctions(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 264, section 6.12.6 - Relational Functions