float
vload_half
(
| size_t offset, |
const __constant half *p) |
Description
Read sizeof(half) bytes of data from address (p +
offset). The data read is interpreted as a half value.
The half value is converted to a float value and the float value is returned. The
read address computed as (p + offset) must be
16-bit aligned.
An application that wants to use half
and halfn
types will need to include the #pragma OPENCL EXTENSION
cl_khr_fp16 : enable
directive.
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.
Copyright © 2007-2011 The Khronos Group Inc.
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