user: 请将以下的汇编代码转换成C语言代码:

```asm
<dmat_as_ddmatrix>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %rdi,-0x68(%rbp)
  mov    %rsi,-0x70(%rbp)
  mov    %rdx,-0x78(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x68(%rbp),%rax
  mov    0x8(%rax),%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x68(%rbp),%rax
  mov    0xc(%rax),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x68(%rbp),%rax
  mov    0x10(%rax),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x68(%rbp),%rax
  mov    0x14(%rax),%eax
  mov    %eax,-0x14(%rbp)
  movl   $0x0,-0x38(%rbp)
  movl   $0x0,-0x34(%rbp)
  mov    -0x68(%rbp),%rax
  mov    0x4(%rax),%eax
  mov    %eax,-0x10(%rbp)
  movl   $0x0,-0x30(%rbp)
  movl   $0x0,-0x2c(%rbp)
  lea    -0x54(%rbp),%rdx
  lea    -0x58(%rbp),%rcx
  mov    -0x68(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <dmat_ldimget@plt>
  mov    -0x58(%rbp),%eax
  test   %eax,%eax
  jle    L117
  mov    -0x54(%rbp),%eax
  test   %eax,%eax
  jg     L141
L117:
  mov    $0xffffffff,%eax
  jmp    L99
L141:
  lea    -0x44(%rbp),%rdi
  lea    -0x48(%rbp),%rcx
  lea    -0x4c(%rbp),%rdx
  lea    -0x50(%rbp),%rsi
  mov    -0x10(%rbp),%eax
  mov    %rdi,%r8
  mov    %eax,%edi
  call   <Cblacs_gridinfo@plt>
  mov    -0x48(%rbp),%eax
  test   %eax,%eax
  jne    L49
  mov    -0x44(%rbp),%eax
  test   %eax,%eax
  jne    L49
  mov    $0x1,%eax
  jmp    L130
L49:
  mov    $0x0,%eax
L130:
  mov    %eax,-0xc(%rbp)
  movl   $0x0,-0x40(%rbp)
  jmp    L102
L128:
  movl   $0x0,-0x2c(%rbp)
  mov    -0x18(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x20(%rbp),%eax
  sub    -0x40(%rbp),%eax
  cmp    %eax,-0x18(%rbp)
  jle    L167
  mov    -0x20(%rbp),%eax
  sub    -0x40(%rbp),%eax
  mov    %eax,-0x28(%rbp)
L167:
  movl   $0x0,-0x3c(%rbp)
  jmp    L169
L76:
  mov    -0x14(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x1c(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  cmp    %eax,-0x14(%rbp)
  jle    L116
  mov    -0x1c(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  mov    %eax,-0x24(%rbp)
L116:
  cmpl   $0x0,-0xc(%rbp)
  je     L27
  mov    -0x20(%rbp),%eax
  imul   -0x3c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x40(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x70(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x30(%rbp),%r9d
  mov    -0x20(%rbp),%r8d
  mov    -0x24(%rbp),%edx
  mov    -0x28(%rbp),%esi
  mov    -0x10(%rbp),%eax
  sub    $0x8,%rsp
  mov    -0x2c(%rbp),%edi
  push   %rdi
  mov    %eax,%edi
  call   <Cdgesd2d@plt>
  add    $0x10,%rsp
L27:
  mov    -0x48(%rbp),%eax
  cmp    %eax,-0x30(%rbp)
  jne    L53
  mov    -0x44(%rbp),%eax
  cmp    %eax,-0x2c(%rbp)
  jne    L53
  mov    -0x58(%rbp),%edi
  mov    -0x58(%rbp),%eax
  imul   -0x34(%rbp),%eax
  mov    %eax,%edx
  mov    -0x38(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x78(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x24(%rbp),%edx
  mov    -0x28(%rbp),%esi
  mov    -0x10(%rbp),%eax
  sub    $0x8,%rsp
  push   $0x0
  mov    $0x0,%r9d
  mov    %edi,%r8d
  mov    %eax,%edi
  call   <Cdgerv2d@plt>
  add    $0x10,%rsp
  mov    -0x34(%rbp),%edx
  mov    -0x24(%rbp),%eax
  add    %edx,%eax
  mov    -0x54(%rbp),%ecx
  cltd
  idiv   %ecx
  mov    %edx,-0x34(%rbp)
L53:
  mov    -0x14(%rbp),%eax
  add    %eax,-0x3c(%rbp)
  mov    -0x2c(%rbp),%eax
  add    $0x1,%eax
  mov    -0x4c(%rbp),%ecx
  cltd
  idiv   %ecx
  mov    %edx,-0x2c(%rbp)
L169:
  mov    -0x3c(%rbp),%eax
  cmp    -0x1c(%rbp),%eax
  jl     L76
  mov    -0x48(%rbp),%eax
  cmp    %eax,-0x30(%rbp)
  jne    L87
  mov    -0x38(%rbp),%edx
  mov    -0x28(%rbp),%eax
  add    %edx,%eax
  mov    -0x58(%rbp),%ecx
  cltd
  idiv   %ecx
  mov    %edx,-0x38(%rbp)
L87:
  mov    -0x18(%rbp),%eax
  add    %eax,-0x40(%rbp)
  mov    -0x30(%rbp),%eax
  add    $0x1,%eax
  mov    -0x50(%rbp),%ecx
  cltd
  idiv   %ecx
  mov    %edx,-0x30(%rbp)
L102:
  mov    -0x40(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jl     L128
  mov    $0x0,%eax
L99:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L155
  call   <__stack_chk_fail@plt>
L155:
  leave
  ret
```

assistant: ```c
int dmat_as_ddmatrix(int *desc, double *A_global, double *A_local) {
  const int M = desc[2], N = desc[3];
  const int Mb = desc[4], Nb = desc[5];
  int nrows, ncols;
  int row, col;
  int recvr = 0, recvc = 0;
  int ictxt = desc[1];
  int nprow, npcol;
  int myprow, mypcol;
  int rdest = 0, cdest = 0;
  int nr, nc;
  dmat_ldimget(desc, &nrows, &ncols);
  if (nrows < 1 || ncols < 1)
    return -1;
  Cblacs_gridinfo(ictxt, &nprow, &npcol, &myprow, &mypcol);
  const int owner = (myprow == 0 && mypcol == 0);
  for (row = 0; row < M; row += Mb, rdest = (rdest + 1) % nprow) {
    cdest = 0;
    nr = Mb;
    if (M - row < Mb)
      nr = M - row;
    for (col = 0; col < N; col += Nb, cdest = (cdest + 1) % npcol) {
      nc = Nb;
      if (N - col < Nb)
        nc = N - col;
      if (owner) {
        Cdgesd2d(ictxt, nr, nc, A_global + (row + M * col), M, rdest, cdest);
      }
      if (myprow == rdest && mypcol == cdest) {
        Cdgerv2d(ictxt, nr, nc, A_local + (recvr + nrows * recvc), nrows, 0, 0);
        recvc = (recvc + nc) % ncols;
      }
    }
    if (myprow == rdest)
      recvr = (recvr + nr) % nrows;
  }
  return 0;
}
```