float
| size_t offset, |
const __constant half *p) |
Description
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.
Notes
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,
nvstore, etc.), where
nn = 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.
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