在CUDA布尔运算 [英] Boolean operations on CUDA

问题描述

我的应用程序需要对位向量执行像OR和XOR位向量运算。

My application needs to perform bit-vector operations like OR and XOR on bit-vectors.

e.g suppose array   A     = 000100101 (a.k.a bit vector)
                    B     = 100101010
                    A . B = 100101111

CUDA是否支持布尔变量？例如布尔为C.如果是的话，它是如何存储和操作的？那么它也支持位向量操作？我找不到CUDA编程指南中的答案。

Does CUDA support boolean variables? e.g. bool as in C. If yes, how is it stored and operated on? Does it also support bit-vector operations?. I couldn't find the answer in the CUDA Programming Guide.

推荐答案

CUDA支持标准C ++ 布尔，但在C ++中，它是唯一保证支持两种状态的类型，因此位操作不应该在它被使用。在CUDA，在C ++中，你得到位运算符的整型（与，或，异或，优势互补，左，右移动）标准的补充。理想情况下，你的目标应该是使用32位类型（或封装的32位CUDA矢量型）内存吞吐量的原因。

CUDA supports the standard C++ bool, but in C++ it is only a type guaranteed to support two states, so bit operations shouldn't be used on it. In CUDA, as in C++, you get the standard complement of bitwise operators for integral types (and, or, xor, complement and left and right shift). Ideally you should aim to use a 32 bit type (or a packed 32 bit CUDA vector type) for memory throughput reasons.

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