关于opencl C 的几点限制

[AMD异构开发]

OpenCL C language isbasically standard C (C99) with some extensions and restrictions.
This language is used to program the kernel. Aside from theseextensions and restrictions, the language can be treated the same asC
Restrictions

Below lists the restricted portion from the C language in OpenCL C.


1.The pointer passed as an argument to a kernel function must be of type __global, __constant, or __local.
2.Pointer to a pointer cannot be passed as an argument to a kernel function.
3.Bit-fields are not supported.
4.Variable length arrays and structures with flexible (or unsized) arrays are not supported.
5.Variadic macros and functions are not supported.
6.C99 standard headers cannot be included
7.The extern, static, auto and register storage-class specifiers are not supported.
8.Predefined identifiers are not supported.
9.Recursion is not supported.
10.The function using the __kernel qualifier can only have return type void in the source code.
11.Writes to a pointer of type char, uchar, char2, uchar2, short, ushort, and half are not supported.（1.0之前，1.1版本以后该限制取消）
12.Support for double precision floating-point is currently an optional extension. It may or may not be implemented.

[zenny_chen]

OpenCL的内建函数的类型都是可以自动识别的，不需要像真正C语言接口那样，每种类型搞个类型后缀～这点还是非常方便的。 其实OpenCL的语法像现在那么简洁也是件好事。既易读又减少编译器的压力～

[小梁_unique]

还是调用支持c++的api比较舒服!

[outstander]

引用 2 楼 liangjunjie_123 的回复:

还是调用支持c++的api比较舒服!

OpenCL现在也支持部分C++特性了，比如说模版