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) |
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.
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 to include appropriate versions of functions that take half, and half{2|3|4|8|16} as arguments and return values.