首页 > 解决方案 > 如何将多维数组传递给 pyopencl.algorithm.copy_if() -- PyOpenCL,

问题描述

以下代码给了我警告“警告:不兼容的整数到指针转换将'__global int'传递给'__global int *'类型的参数;使用&获取地址”并且不会产生所需的结果。

import pyopencl as cl  
import pyopencl.array
import pyopencl.algorithm
import numpy as np     

platform = cl.get_platforms()
my_devices = platform[0].get_devices(device_type=cl.device_type.ALL)
ctx = cl.Context(devices=my_devices)
queue = cl.CommandQueue(ctx)

aryary = np.array([[10, 11, 12, 13, 14, 15, 16, 17], [1, 2, 3, 4, 0, 0, 0, 0], [108, 0, 0, 0, 0, 0, 0, 0]], np.int32)
cl_aryary = cl.array.to_device(queue, aryary)
lenary = np.array([8, 4, 1], np.int32)
cl_lenary = cl.array.to_device(queue, lenary)

result = cl.algorithm.copy_if(
  cl_aryary, 
  "sum_array(ary[i], len[i]) == 108", 
  extra_args=[('len', cl_lenary)], 
  preamble='''
    int sum_array(__global int *a, int num_elements)
    {
       int i, sum=0;
       for (i=0; i<num_elements; i++)
       {
       sum = sum + a[i];
       }
       return(sum);
    }  
  ''', 
  queue=queue
)

print(result)

编辑:供参考:

https://documen.tician.de/pyopencl/algorithm.html#module-pyopencl.algorithm

标签: pythoncopenclpyopencl

解决方案


函数的调用int sum_array(__global int *a, int num_elements)在该行中,"sum_array(ary[i], len[i]) == 108",但应该有一个指针,而不是函数中定义的数组元素。那将是: "sum_array(&ary[i], len[i]) == 108",


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