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) |
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 the built-in signed integer types,
i.e. char, charn,
short, shortn, int,
intn, long, and
longn.
n is 2, 3, 4, 8, or 16.
The argument type ugentype refers to the built-in 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 versions that take half, and half{2|3|4|8|16} as arguments.
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