user: 请将以下的汇编代码转换成C语言代码:

```asm
<ff_dm_quad>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x98,%rsp
  mov    %edi,0x5c(%rsp)
  mov    %rdx,0x60(%rsp)
  mov    %rcx,0x68(%rsp)
  movsd  %xmm0,0x28(%rsp)
  mov    %r8,0x30(%rsp)
  mov    %r9,0x38(%rsp)
  mov    0xd0(%rsp),%rax
  mov    %rax,0x40(%rsp)
  mov    0xd8(%rsp),%r12
  mov    %fs:0x28,%rax
  mov    %rax,0x88(%rsp)
  xor    %eax,%eax
  test   %edi,%edi
  jle    L114
  mov    %edi,%eax
  mov    %rax,0x50(%rsp)
  mov    %edi,0x58(%rsp)
  mov    $0x1,%r15d
  pxor   %xmm5,%xmm5
  movsd  %xmm5,(%rsp)
  lea    0x70(%rsp),%rax
  mov    %rax,0x10(%rsp)
  mov    %r12,%r13
  mov    %rsi,%r12
  jmp    L78
L25:
  call   <sqrt@plt>
  jmp    L116
L64:
  add    $0x1,%rbx
  cmp    %r15,%rbx
  je     L72
L74:
  mov    %ebx,0x48(%rsp)
  mov    (%r14,%rbx,8),%rbp
  movq   %rbp,%xmm3
  comisd D4(%rip),%xmm3
  jbe    L64
  mov    0x20(%rsp),%rax
  movsd  (%rax,%rbx,8),%xmm6
  movsd  %xmm6,0x8(%rsp)
  lea    (%rbx,%rbx,2),%eax
  cltq
  lea    (%r12,%rax,8),%rsi
  mov    0x40(%rsp),%r9
  mov    0x38(%rsp),%r8
  mov    0x30(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    0x18(%rsp),%rdi
  call   <calc_delta@plt>
  movsd  0x70(%rsp),%xmm0
  mulsd  %xmm0,%xmm0
  movapd %xmm0,%xmm1
  movsd  0x78(%rsp),%xmm0
  mulsd  %xmm0,%xmm0
  addsd  %xmm0,%xmm1
  movsd  0x80(%rsp),%xmm0
  mulsd  %xmm0,%xmm0
  addsd  %xmm1,%xmm0
  pxor   %xmm7,%xmm7
  ucomisd %xmm0,%xmm7
  ja     L25
  sqrtsd %xmm0,%xmm0
L116:
  movapd %xmm0,%xmm2
  movq   %rbp,%xmm6
  subsd  %xmm6,%xmm2
  movsd  0x8(%rsp),%xmm5
  movapd %xmm5,%xmm1
  movsd  0x28(%rsp),%xmm4
  mulsd  %xmm4,%xmm1
  mulsd  %xmm2,%xmm1
  mulsd  %xmm2,%xmm1
  addsd  (%rsp),%xmm1
  movsd  %xmm1,(%rsp)
  test   %r13,%r13
  je     L64
  movapd %xmm4,%xmm1
  addsd  %xmm4,%xmm1
  mulsd  %xmm5,%xmm1
  mulsd  %xmm2,%xmm1
  divsd  %xmm0,%xmm1
  mov    %r13,%rcx
  mov    0x10(%rsp),%rdx
  movapd %xmm1,%xmm0
  mov    0x48(%rsp),%esi
  mov    0x4c(%rsp),%edi
  call   <add_grad@plt>
  jmp    L64
L72:
  add    $0x1,%r15
  mov    0x5c(%rsp),%edi
  add    %edi,0x58(%rsp)
L78:
  mov    %r15d,%eax
  mov    %r15d,0x4c(%rsp)
  cmp    0x50(%rsp),%r15
  je     L31
  test   %r15d,%r15d
  jle    L72
  lea    (%rax,%rax,2),%eax
  cltq
  lea    (%r12,%rax,8),%rax
  mov    %rax,0x18(%rsp)
  movslq 0x58(%rsp),%rax
  shl    $0x3,%rax
  mov    0x60(%rsp),%rcx
  lea    (%rcx,%rax,1),%r14
  add    0x68(%rsp),%rax
  mov    %rax,0x20(%rsp)
  mov    $0x0,%ebx
  jmp    L74
L114:
  pxor   %xmm5,%xmm5
  movsd  %xmm5,(%rsp)
L31:
  mov    0x88(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L4
  movsd  (%rsp),%xmm0
  add    $0x98,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L4:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_label: D4
data_type: f64

tool: D4: 0

assistant: ```c
double ff_dm_quad(int n, double *cor, double *dm0, double *dmk, double amp, double *unitcell, double *unitcell_reciproke, int *unitcell_active, double *gradient) {
  int i, j;
  double d, d0, k, tmp, result;
  double delta[3];
  result = 0.0;
  for (i = 0; i < n; i++) {
    for (j = 0; j < i; j++) {
      d0 = dm0[i * n + j];
      k = dmk[i * n + j];
      if (d0 > 0) {
        calc_delta(cor + 3 * i, cor + 3 * j, delta, unitcell, unitcell_reciproke, unitcell_active);
        tmp = delta[0];
        d = tmp * tmp;
        tmp = delta[1];
        d += tmp * tmp;
        tmp = delta[2];
        d += tmp * tmp;
        d = sqrt(d);
        tmp = (d - d0);
        result += amp * k * tmp * tmp;
        if (gradient != NULL) {
          tmp = 2 * amp * k * tmp / d;
          add_grad(i, j, tmp, delta, gradient);
        }
      }
    }
  }
  return result;
}
```