zoukankan      html  css  js  c++  java
  • Ubuntu16.04安装openBLAS

    参考博客:https://www.cnblogs.com/chay/p/10272949.html

    cblas_daxpy(_:_:_:_:_:_:):https://developer.apple.com/documentation/accelerate/1513298-cblas_daxpy

     

    Ubuntu16.04安装openBLAS

    基本步骤:

     git clone git://github.com/xianyi/OpenBLAS
      cd OpenBLAS
      sudo apt-get install gfortran
      sudo make FC=gfortran
      sudo make install

    最后安装在 /opt 下,执行:

    ln -s /opt/OpenBLAS/lib/libopenblas.so.0   /usr/lib/libopenblas.so.0

    创建一个测试程序:

    #include <stdio.h>
    #include <stdlib.h>
    #include "cblas.h"
    
    int main(){
    
            int n;                          /*! array size */
            double da;                      /*! double constant */
            double *dx;                     /*! input double array */
            int incx;                        /*! input stride */
            double *dy;                      /*! output double array */
            int incy;                       /*! output stride */
    
            int i;
    
            n = 10;
            da = 10;
            dx = (double*)malloc(sizeof(double)*n);
            incx = 1;
            dy = (double*)malloc(sizeof(double)*n);
            incy = 1;
    
            for(i=0;i<n;i++){
                    dx[i] = 9-i;
                    dy[i] = i;
                    printf("%f ",dy[i]);    //输出原来的dy
            }
            printf("
    ");
    
            cblas_daxpy(n, da, dx,incx, dy, incy);  //运行daxpy程序
        //    cblas_dcopy(n, dx,incx, dy, incy);      //运行dcopy程序
    
            for(i=0;i<n;i++){
                printf("%f ",dy[i]);   //输出计算后的dy
            }
            printf("
    ");
    
            return 0;   
    }  

    运行以下命令,生成a.out可执行文件:

    gcc test.c  -I /opt/OpenBLAS/include/ -L/opt/OpenBLAS/lib -lopenblas

    执行结果:(此处相当于:da*dx[i]+dy[i])

    0.000000 1.000000 2.000000 3.000000 4.000000 5.000000 6.000000 7.000000 8.000000 9.000000 
    90.000000 81.000000 72.000000 63.000000 54.000000 45.000000 36.000000 27.000000 18.000000 9.000000
  • 相关阅读:
    thinkphp SAE
    thinkphp rpc
    thinkphp REST
    thinkphp 图形处理
    thinkphp 验证码
    thinkphp 文件上传
    thinkphp 数据分页
    thinkphp 多语言支持
    thinkphp cookie支持
    thinkphp session支持
  • 原文地址:https://www.cnblogs.com/exciting/p/10905297.html
Copyright © 2011-2022 走看看