user: 请从给定的汇编指令推导出C源代码:

```asm
<dmatrix>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    %rcx,-0x50(%rbp)
  mov    -0x40(%rbp),%rax
  sub    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x50(%rbp),%rax
  sub    -0x48(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x18(%rbp),%rax
  add    $0x1,%rax
  shl    $0x3,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  jne    L46
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <nrerror@plt>
L46:
  addq   $0x8,-0x8(%rbp)
  mov    -0x38(%rbp),%rax
  shl    $0x3,%rax
  neg    %rax
  add    %rax,-0x8(%rbp)
  mov    -0x18(%rbp),%rax
  imul   -0x10(%rbp),%rax
  add    $0x1,%rax
  shl    $0x3,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    -0x38(%rbp),%rdx
  lea    0x0(,%rdx,8),%rcx
  mov    -0x8(%rbp),%rdx
  add    %rcx,%rdx
  mov    %rax,(%rdx)
  mov    -0x38(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  test   %rax,%rax
  jne    L77
  lea    D17(%rip),%rax
  mov    %rax,%rdi
  call   <nrerror@plt>
L77:
  mov    -0x38(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x38(%rbp),%rax
  lea    0x0(,%rax,8),%rcx
  mov    -0x8(%rbp),%rax
  add    %rcx,%rax
  add    $0x8,%rdx
  mov    %rdx,(%rax)
  mov    -0x38(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x48(%rbp),%rax
  shl    $0x3,%rax
  neg    %rax
  mov    %rax,%rcx
  mov    -0x38(%rbp),%rax
  lea    0x0(,%rax,8),%rsi
  mov    -0x8(%rbp),%rax
  add    %rsi,%rax
  add    %rcx,%rdx
  mov    %rdx,(%rax)
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x28(%rbp)
  jmp    L76
L74:
  mov    -0x28(%rbp),%rax
  shl    $0x3,%rax
  lea    -0x8(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x10(%rbp),%rax
  lea    0x0(,%rax,8),%rcx
  mov    -0x28(%rbp),%rax
  lea    0x0(,%rax,8),%rsi
  mov    -0x8(%rbp),%rax
  add    %rsi,%rax
  add    %rcx,%rdx
  mov    %rdx,(%rax)
  addq   $0x1,-0x28(%rbp)
L76:
  mov    -0x28(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jle    L74
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  jmp    L13
L25:
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  jmp    L72
L20:
  mov    -0x28(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x20(%rbp),%rax
  shl    $0x3,%rax
  add    %rdx,%rax
  pxor   %xmm0,%xmm0
  movsd  %xmm0,(%rax)
  addq   $0x1,-0x20(%rbp)
L72:
  mov    -0x20(%rbp),%rax
  cmp    -0x50(%rbp),%rax
  jle    L20
  addq   $0x1,-0x28(%rbp)
L13:
  mov    -0x28(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jle    L25
  mov    -0x8(%rbp),%rax
  leave
  ret
```

tool_calls: name: parse_data
arguments: tag: D18
type_guessed: string
name: parse_data
arguments: tag: D17
type_guessed: string

tool: D18: allocation failure 1 in dmatrix()

tool: D17: allocation failure 2 in dmatrix()

assistant: ```c
double **dmatrix(long nrl, long nrh, long ncl, long nch) {
  long i, j, nrow = nrh - nrl + 1, ncol = nch - ncl + 1;
  double **m;
  m = (double **)malloc((size_t)((nrow + 1) * sizeof(double *)));
  if (!m)
    nrerror("allocation failure 1 in dmatrix()");
  m += 1;
  m -= nrl;
  m[nrl] = (double *)malloc((size_t)((nrow * ncol + 1) * sizeof(double)));
  if (!m[nrl])
    nrerror("allocation failure 2 in dmatrix()");
  m[nrl] += 1;
  m[nrl] -= ncl;
  for (i = nrl + 1; i <= nrh; i++)
    m[i] = m[i - 1] + ncol;
  for (i = nrl; i <= nrh; i++)
    for (j = ncl; j <= nch; j++)
      m[i][j] = 0.0;
  return m;
}
```