-
short upsample(char hi, uchar lo);
- ushort upsample(uchar hi, uchar lo);
- shortn upsample(charn hi, ucharn lo);
- ushortn upsample(ucharn hi, ucharn lo);
- int upsample(short hi, ushort lo);
- uint upsample(ushort hi, ushort lo);
- intn upsample(shortn hi, ushortn lo);
- uintn upsample(ushortn hi, ushortn lo);
- long upsample(int hi, uint lo);
- ulong upsample(uint hi, uint lo);
- longn upsample(intn hi, uintn lo);
- ulongn upsample(uintn hi, uintn lo);
- ushort upsample(uchar hi, uchar lo);
DESCRIPTION
-
result[i] = ((short)hi[i] << 8) | lo[i] result[i] = ((ushort)hi[i] << 8) | lo[i] result[i] = ((int)hi[i] << 16) | lo[i] result[i] = ((uint)hi[i] << 16) | lo[i] result[i] = ((long)hi[i] << 32) | lo[i] result[i] = ((ulong)hi[i] << 32) | lo[i]
NOTES
We use the generic type name gentype to indicate that the function can take char, char{2|3|4|8|16}, uchar, uchar{2|3|4|8|16}, short, short{2|3|4|8|16}, ushort, ushort{2|3|4|8|16}, int, int{2|3|4|8|16}, uint, uint{2|3|4|8|16}, long, long{2|3|4|8|16}, ulong, or ulong{2|3|4|8|16} as the type for the arguments. We use the generic type name ugentype to refer to unsigned versions of gentype. For example, if gentype is char4, ugentype is uchar4.
We also use the generic type name sgentype to indicate that the function can take a scalar data type i.e. char, uchar, short, ushort, int, uint, long, or ulong as the type for the arguments. For built-in integer functions that take gentype and sgentype arguments, the gentype argument must be a vector or scalar version of the sgentype argument. For example, if sgentype is uchar, gentype must be uchar or uchar{2|3|4|8|16}. For vector versions, sgentype is implicitly widened to gentype as described in section 6.3.a of the OpenCL specification.
For any specific use of a function, the actual type has to be the same for all arguments and the return type unless otherwise specified.
SPECIFICATION
m[blue]OpenCL Specificationm[][1]
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, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.
NOTES
- 1.
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OpenCL Specification
- page 256, section 6.12.3 - Integer Functions