具有标量参数的OpenCL Select方法

问题描述

我有以下代码行，如果标量不为零，我希望a4的每个分量等于c4的对应分量，否则将其设置为b4的对应分量:

I have the following line of code, where I want each component of a4 to equal the corresponding component of c4 if scalar is non zero, otherwise set it to the corresponding component of b4:

 uint4 a4 =       select(b4,   c4,   (uint4)(scalar != 0));

但是，阅读选择文档后，似乎必须为要选择的c4组件设置MSB.

But, reading the select docs, it looks like MSB must be set for the c4 component to be chosen.

以上行正确吗?我感觉不是.

Is the above line correct? I have a feeling it is not.

推荐答案

原来，我只需要将第三个参数调整为: (uint4)标量！= 0

Turns out I just need to adjust the third argument to: (uint4)scalar != 0

这是正确的.

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