vloada_halfn - Read half float vector from a pointer to memory.
floatn vloada_halfn(size_t offset, const __global half *p);
floatn vloada_halfn(size_t offset, const __local half *p);
floatn vloada_halfn(size_t offset, const __constant half *p);
floatn vloada_halfn(size_t offset, const __private half *p);
For n = 1, 2, 4, 8 and 16 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 address computed as (p + (offset * n)) must be aligned to sizeof(halfn) bytes.
For n = 3, vloada_half3 reads a half3 from address (p + (offset * 4)) and returns a float3. The address computed as (p + (offset * 4)) must be aligned to sizeof (half) * 4 bytes.
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. vloadn, vstoren, etc.), where 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(3clc), local(3clc), or private(3clc) memory for store functions. The pointer argument p can be a pointer to __global, __local, constant(3clc) or __private memory for load functions.
In addition vloada_half3 reads x, y, z components from address (p + (offset * 4)) into a 3- component vector.
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- OpenCL Specification
|01/14/2021||The Khronos Group|