Question

我想在Visual Studio中使用matlab，mex，intel fortran等，并使用标量的3 * 3矩阵的简单乘积，请参阅：

Strange values at debug for fortran mex code

基本上，您输入一个标量和一个3 * 3矩阵，然后返回它们的乘积，一个3 * 3矩阵。 我现在正尝试编写通用矩阵产品的代码。首先，我想依靠matmul来验证所有的mex接口层。因此，基本例程是：

    subroutine mymatmul(A, B, C, m, n, p)
        real*8, allocatable, dimension(:,:) :: A, B, C
        integer m, n, p
        allocate( A(m,n), B(n,p), C(m,p) )
        C = matmul(A,B)
    end

目前，应该产生mexw64文件的包装代码是：

#include <fintrf.h>
C     The gateway routine
    subroutine mexFunction(nlhs, plhs, nrhs, prhs)

    mwPointer mxGetM, mxGetN, mxIsNumeric
    mwPointer mxCreateDoubleMatrix
    mwPointer plhs(*), prhs(*)
    mwPointer A_pr, B_pr, C_pr
    integer nlhs, nrhs
    mwSize m, n, p, q
    mwSize size1, size2, size3
    real*8  x(3,3), y(3,3), z(3,3)

C     Check for proper number of arguments. 
    if (nrhs .ne. 2) then
        call mexErrMsgTxt('Two inputs required.')
    elseif (nlhs .ne. 1) then
        call mexErrMsgTxt('One output required.')
    endif

C     Check to see both inputs are numeric.
    if (mxIsNumeric(prhs(1)) .ne. 1) then
        call mexErrMsgTxt('Input #1 is not a numeric array.')
    elseif (mxIsNumeric(prhs(2)) .ne. 1) then
        call mexErrMsgTxt('Input #2 is not a numeric array.')
    endif

C     Get the size of the input matrix #1.
    m = mxGetM(prhs(1))
    n = mxGetN(prhs(1))

C     Get the size of the input matrix #2.
    p = mxGetM(prhs(2))
    q = mxGetN(prhs(2))

C     Check that the sizes are compatible for a matrix product
    if (n .ne. p) then
        call mexErrMsgTxt('nbcol1 should be equal to nbrow2.')
    endif

    size1 = m*n
    size2 = p*q

C     Create matrix for the return argument.
    plhs(1) = mxCreateDoubleMatrix(m, q, 0)
    A_pr = mxGetPr(prhs(1))
    B_pr = mxGetPr(prhs(2))
    C_pr = mxGetPr(plhs(1))

C     Load the data into Fortran arrays.
    call mxCopyPtrToReal8(A_pr, x, size1)
    call mxCopyPtrToReal8(B_pr, y, size2)

C     Call the computational subroutine.
    call mymatmul(x, y, z, m, n, q)

C     Load the output into a MATLAB array.
    call mxCopyReal8ToPtr(z, C_pr, size3)

    return
    end

在编译时出现以下错误：

1>C:\path\to\mymatmulg.F(55): warning #6075: The data type of the actual argument does not match the definition.   [M]
1>C:\path\to\mymatmulg.F(55): warning #6075: The data type of the actual argument does not match the definition.   [N]
1>C:\path\to\mymatmulg.F(55): warning #6075: The data type of the actual argument does not match the definition.   [Q]
1>C:\path\to\mymatmulg.F(55): error #7976: An allocatable dummy argument may only be argument associated with an allocatable actual argument.   [X]
1>C:\path\to\mymatmulg.F(55): error #7976: An allocatable dummy argument may only be argument associated with an allocatable actual argument.   [Y]
1>C:\path\to\mymatmulg.F(55): error #7976: An allocatable dummy argument may only be argument associated with an allocatable actual argument.   [Z]
1>C:\path\to\mymatmulg.F(55): error #8055: The procedure has a dummy argument that has the ALLOCATABLE, ASYNCHRONOUS, OPTIONAL, POINTER, TARGET, VALUE or VOLATILE attribute. Required explicit interface is missing from original source.   [X]
1>C:\path\to\mymatmulg.F(55): error #8055: The procedure has a dummy argument that has the ALLOCATABLE, ASYNCHRONOUS, OPTIONAL, POINTER, TARGET, VALUE or VOLATILE attribute. Required explicit interface is missing from original source.   [Y]
1>C:\path\to\mymatmulg.F(55): error #8055: The procedure has a dummy argument that has the ALLOCATABLE, ASYNCHRONOUS, OPTIONAL, POINTER, TARGET, VALUE or VOLATILE attribute. Required explicit interface is missing from original source.   [Z]
1>compilation aborted for C:\path\to\mymatmulg.F (code 1)

所有错误都发生在mex包装代码的第55行，即：

  call mymatmul(x, y, z, m, n, q)

我在其中调用fortran子例程。

我理解这些错误：子例程在构造上需要可分配的数组，而我传递给它的数组x，y和z在行中声明

  real*8  x(3,3), y(3,3), z(3,3)

显然不是可分配的。

如何修改现有的mex包装代码以使其正常工作？

（详细信息：我有Visual Studio 2017的最新更新，Matlab 2018b，我尝试使用Parallel Studio XE 2018 Update 5和2019 Update 3的Intel Visual Fortran。）

矩阵产品的Fortran mex文件：从不可分配到可分配

0 个答案: