user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<conjugate_gradient>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %esi,-0x3c(%rbp)
  mov    %edx,-0x40(%rbp)
  mov    %ecx,-0x44(%rbp)
  mov    %r8,-0x50(%rbp)
  mov    %r9,-0x58(%rbp)
  movl   $0x0,-0x24(%rbp)
  movq   $0x0,-0x20(%rbp)
  mov    -0x3c(%rbp),%eax
  cmp    -0x40(%rbp),%eax
  jl     L37
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x58(%rbp),%r8
  mov    -0x50(%rbp),%rdi
  mov    -0x44(%rbp),%ecx
  mov    -0x40(%rbp),%edx
  mov    -0x3c(%rbp),%esi
  mov    -0x38(%rbp),%rax
  push   $0x0
  push   -0x8(%rbp)
  push   -0x10(%rbp)
  push   -0x18(%rbp)
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %rax,%rdi
  call   <iterate_conjgrad@plt>
  add    $0x20,%rsp
  mov    %eax,-0x24(%rbp)
  cmpl   $0xffffffff,-0x24(%rbp)
  jne    L57
  movl   $0xffffffff,-0x24(%rbp)
  jmp    L57
L37:
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x20(%rbp)
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x8(%rbp)
  mov    -0x40(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x3c(%rbp),%eax
  cltq
  shl    $0x3,%eax
  mov    %eax,%edi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%r8
  mov    -0x50(%rbp),%rdi
  mov    -0x44(%rbp),%ecx
  mov    -0x40(%rbp),%edx
  mov    -0x3c(%rbp),%esi
  mov    -0x38(%rbp),%rax
  push   -0x58(%rbp)
  push   -0x8(%rbp)
  push   -0x10(%rbp)
  push   -0x18(%rbp)
  mov    %r8,%r9
  mov    %rdi,%r8
  mov    %rax,%rdi
  call   <iterate_conjgrad@plt>
  add    $0x20,%rsp
  mov    %eax,-0x24(%rbp)
  cmpl   $0xffffffff,-0x24(%rbp)
  jne    L32
  movl   $0xffffffff,-0x24(%rbp)
  jmp    L57
L32:
  nop
L57:
  cmpq   $0x0,-0x20(%rbp)
  je     L6
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
L6:
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
  mov    -0x24(%rbp),%eax
  leave
  ret
```

assistant: ```c
int conjugate_gradient(double *A, int m, int n, int stride, double *b, double *x0) {
  double *y, *res, *dir, *tmp;
  int err;
  err = 0;
  y = NULL;
  if (m >= n) {
    tmp = malloc(m * sizeof tmp[0]);
    dir = malloc(m * sizeof dir[0]);
    res = malloc(m * sizeof res[0]);
    if ((err = iterate_conjgrad(A, m, n, stride, b, x0, res, dir, tmp, NULL)) == -1) {
      err = -1;
      goto err_out;
    }
  } else {
    y = malloc(m * sizeof y[0]);
    tmp = malloc(m * sizeof tmp[0]);
    dir = malloc(n * sizeof dir[0]);
    res = malloc(m * sizeof res[0]);
    if ((err = iterate_conjgrad(A, m, n, stride, b, y, res, dir, tmp, x0)) == -1) {
      err = -1;
      goto err_out;
    }
  }
err_out:
  if (y != NULL)
    free(y);
  free(res);
  free(dir);
  free(tmp);
  return err;
}
```