float
| size_t offset, |
const __constant half *p) |
Read sizeof(halfn
) bytes of data from address
(p
+ (offset
* n
)). The data
read is interpreted as a halfn
value.
The halfn
value read is
converted to a floatn
value and the
floatn
value is returned. The read address
computed as (p
+ (offset
* n
))
must be 16-bit aligned.
Vector Data Load and Store Functions allow you to read and write vector types from a pointer to memory.
The generic type gentype is used to indicate the built-in data types char, uchar, short, ushort, int, uint, long, ulong, float, or double.
The generic type name gentypen
represents n
-element vectors of gentype
elements. The suffix n
is also used in the
function names (i.e. vload
,
n
vstore
, etc.), where
n
n
= 2, 3, 4, 8, or 16.
The results of vector data
load and store functions are undefined if the address being read from or written to is
not correctly aligned. The pointer argument p
can be a pointer to
__global,
__local, or
__private
memory for store functions. The pointer argument
p
can be a pointer to __global, __local, __constant or __private
memory for load functions.
When extended by the
cl_khr_fp16 extension,
the generic type gentypen
is extended to
include half, half2, half3, half4,
half8, and half16.
vload3
and vload_half3
read x
,
y
, z
components from address (p
+
(offset
* 3)) into a 3-component vector.