未能初始化 opencl 向量文字

发布于 2025-01-04 14:08:57 字数 859 浏览 0 评论 0原文

所以我试图在我的 opencl 主机代码中初始化一个变量，如下所示：

cl_float2       es = (cl_float2)(0.0f,0.0f);

其中，使用 Clang 2.9，失败：

source/solveEikonalEq.c:75:38: warning: expression result unused [-Wunused-value]
cl_float2       es = (cl_float2)(0.0f,0.0f);
                                 ^~~~
source/solveEikonalEq.c:75:26: error: cast to union type from type 'float' not present in union
cl_float2       es = (cl_float2)(0.0f,0.0f);             //ray's tangent vector
                     ^          ~~~~~~~~~~~

并且，当使用 GCC 4.6.1 时，失败：

source/solveEikonalEq.c:75:42: warning: left-hand operand of comma expression has no effect [-Wunused-value]
source/solveEikonalEq.c:75:26: error: cast to union type from type not present in union

我正在使用 AMD 的 opencl sdk，并且可以构建例子就好了。我做错了什么？

原文

So i'm trying to initialize a variable in my opencl host code like this:

cl_float2       es = (cl_float2)(0.0f,0.0f);

Which, using Clang 2.9, fails with:

source/solveEikonalEq.c:75:38: warning: expression result unused [-Wunused-value]
cl_float2       es = (cl_float2)(0.0f,0.0f);
                                 ^~~~
source/solveEikonalEq.c:75:26: error: cast to union type from type 'float' not present in union
cl_float2       es = (cl_float2)(0.0f,0.0f);             //ray's tangent vector
                     ^          ~~~~~~~~~~~

And, when using GCC 4.6.1, fails with:

source/solveEikonalEq.c:75:42: warning: left-hand operand of comma expression has no effect [-Wunused-value]
source/solveEikonalEq.c:75:26: error: cast to union type from type not present in union

I'm using AMD's opencl sdk, and can build the examples just fine.
What is it i'm doing wrong?

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烂人 2025-01-11 14:08:57

您正在尝试在主机代码中使用 OpenCL C 样式初始化程序，该代码可能是使用 C 编译器编译的。换句话说，这种初始化方式仅在您的内核中有效。在那里，您不会使用平台类型，而只会使用 float2。

在您的主机代码中尝试一下：

cl_float2 var = { 0.0f, 0.0f };

这对您有用。

You are trying to use an OpenCL C-style initializer in your host code, which is presumably compiled with a C compiler. That style of initialization is only valid in your kernels, in other words. And there, you would not use a platform type, but would instead just use a float2.

Try this in your host code instead: