[英]How do I use boost.compute functions in a functor which will be used by Thrust on a GPU?
I'm trying to use a special function provided by boost.math in a thrust algorithm. 我正在尝试在推力算法中使用boost.math提供的特殊功能。
Basically, I want to do a transformation, like so 基本上,我想做一个转变,像这样
thrust::device_vector<double> in(1000);
thrust::device_vector<double> out(1000);
thrust::transform(in.begin(), in.end(), out.begin(), myfunctor());
where myfunctor()
is given by 其中myfunctor()
由
#include <boost/math/special_functions/ellint_1.hpp>
.
.
.
struct myfunctor {
__host__ __device__
double operator()(double k) {
return boost::math::ellint_1(sqrt(k));
}
};
I keep getting warning: calling a __host__ function from a __host__ __device__ function is not allowed
right at the line where ellint_1
is called in the functor. 我不断收到warning: calling a __host__ function from a __host__ __device__ function is not allowed
在函子中调用ellint_1
的行上, warning: calling a __host__ function from a __host__ __device__ function is not allowed
。
Am I doing something wrong or is boost.math not suited for GPGPU use (because from what I've read, i definitely thought it was)? 我是在做错什么还是boost.math不适合GPGPU使用(因为我读过的书,我绝对认为是这样)?
Any function called inside __device__
qualified functions must also be a __device__
qualified function. 在__device__
限定函数内部调用的任何函数也必须是__device__
限定函数。 And boost::math::ellint_1()
does not have such qualifier. 并且boost::math::ellint_1()
没有这种限定符。
See CUDA Programming Guide B.1. 请参阅CUDA编程指南B.1。 - Function Execution Space Specifiers https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#function-declaration-specifiers -函数执行空间说明符https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#function-declaration-specifiers
And boost::math is unrelated to boost::compute, with the latter focusing on generic STL-like algorithms and containers. boost :: math与boost :: compute无关,后者主要关注类STL的通用算法和容器。
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