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VLOADA_HALFN(3clc) | OpenCL Manual | VLOADA_HALFN(3clc) |
NAME¶
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);
DESCRIPTION¶
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.
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. 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.
SPECIFICATION¶
OpenCL Specification[1]
SEE ALSO¶
vectorDataLoadandStoreFunctions(3clc)
AUTHORS¶
The Khronos Group
COPYRIGHT¶
Copyright © 2007-2011 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and/or associated documentation files (the
"Materials"), to deal in the Materials without restriction,
including without limitation the rights to use, copy, modify, merge,
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in all copies or substantial portions of the Materials.
NOTES¶
- 1.
- OpenCL Specification
11/18/2024 | The Khronos Group |