user: 这段汇编代码用C语言表示是什么样的?

```asm
<c_nb_step>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x58,%rsp
  mov    %rsi,0x38(%rsp)
  movss  %xmm0,0x4c(%rsp)
  mov    %edx,0x48(%rsp)
  test   %edx,%edx
  jle    L24
  mov    %rdi,%r13
  lea    0xc(%rdi),%rax
  mov    %rax,0x40(%rsp)
  mov    $0x0,%ebp
  jmp    L59
L8:
  movsd  0x18(%rsp),%xmm0
  call   <sqrt@plt>
  movapd %xmm0,%xmm2
L60:
  movss  0xc(%r14,%r13,1),%xmm0
  mov    0x30(%rsp),%rax
  mulss  (%rax),%xmm0
  cvtss2sd %xmm0,%xmm0
  divsd  0x18(%rsp),%xmm0
  mulsd  D9(%rip),%xmm0
  movsd  0x20(%rsp),%xmm1
  divsd  %xmm2,%xmm1
  mulsd  %xmm0,%xmm1
  movsd  0x8(%rsp),%xmm6
  subsd  %xmm1,%xmm6
  movsd  %xmm6,0x8(%rsp)
  movsd  0x28(%rsp),%xmm1
  divsd  %xmm2,%xmm1
  mulsd  %xmm1,%xmm0
  movsd  0x10(%rsp),%xmm7
  subsd  %xmm0,%xmm7
  movsd  %xmm7,0x10(%rsp)
L36:
  lea    0x1(%rbx),%eax
  cmp    %eax,0x48(%rsp)
  je     L79
  mov    %eax,%ebx
L67:
  cmp    %ebx,%ebp
  je     L36
  lea    0x0(,%rbx,4),%eax
  cltq
  lea    0x0(,%rax,4),%r14
  movss  (%r15),%xmm0
  subss  0x0(%r13,%rax,4),%xmm0
  pxor   %xmm4,%xmm4
  cvtss2sd %xmm0,%xmm4
  movsd  %xmm4,0x20(%rsp)
  movss  (%r12),%xmm0
  subss  0x4(%r13,%rax,4),%xmm0
  pxor   %xmm5,%xmm5
  cvtss2sd %xmm0,%xmm5
  movsd  %xmm5,0x28(%rsp)
  movapd %xmm4,%xmm1
  mulsd  %xmm4,%xmm1
  movapd %xmm5,%xmm0
  mulsd  %xmm5,%xmm0
  addsd  %xmm0,%xmm1
  movsd  %xmm1,0x18(%rsp)
  pxor   %xmm6,%xmm6
  ucomisd %xmm1,%xmm6
  ja     L8
  movapd %xmm1,%xmm2
  sqrtsd %xmm2,%xmm2
  jmp    L60
L79:
  movss  0x4c(%rsp),%xmm6
  pxor   %xmm1,%xmm1
  cvtss2sd %xmm6,%xmm1
  mov    0x40(%rsp),%rdx
  pxor   %xmm2,%xmm2
  cvtss2sd (%rdx),%xmm2
  movsd  0x8(%rsp),%xmm0
  divsd  %xmm2,%xmm0
  mulsd  %xmm1,%xmm0
  mov    0x38(%rsp),%rsi
  pxor   %xmm2,%xmm2
  cvtss2sd (%rsi),%xmm2
  addsd  %xmm2,%xmm0
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm0,(%rsi)
  pxor   %xmm2,%xmm2
  cvtss2sd (%rdx),%xmm2
  movsd  0x10(%rsp),%xmm0
  divsd  %xmm2,%xmm0
  mulsd  %xmm1,%xmm0
  pxor   %xmm1,%xmm1
  cvtss2sd 0x4(%rsi),%xmm1
  addsd  %xmm1,%xmm0
  cvtsd2ss %xmm0,%xmm0
  movss  %xmm0,0x4(%rsi)
  movaps %xmm6,%xmm0
  mulss  (%rsi),%xmm0
  addss  -0xc(%rdx),%xmm0
  movss  %xmm0,-0xc(%rdx)
  mulss  0x4(%rsi),%xmm6
  movaps %xmm6,%xmm0
  addss  -0x8(%rdx),%xmm0
  movss  %xmm0,-0x8(%rdx)
  lea    0x1(%rbp),%eax
  add    $0x10,%rsi
  mov    %rsi,0x38(%rsp)
  add    $0x10,%rdx
  mov    %rdx,0x40(%rsp)
  cmp    %ebx,%ebp
  je     L24
  mov    %eax,%ebp
L59:
  lea    0x0(,%rbp,4),%eax
  cltq
  shl    $0x2,%rax
  lea    0x0(%r13,%rax,1),%r15
  lea    0x4(%rax,%r13,1),%r12
  lea    0xc(%rax,%r13,1),%rax
  mov    %rax,0x30(%rsp)
  pxor   %xmm7,%xmm7
  movsd  %xmm7,0x10(%rsp)
  movsd  %xmm7,0x8(%rsp)
  mov    $0x0,%ebx
  jmp    L67
L24:
  add    $0x58,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

tool_calls: name: extract_symbolic_data
arguments: tag: D9
type_guessed: byte[8]

tool: {"D9": [0xd1,0x37,0x97,0x65,0x9b,0x58,0xd2,0x3d]}

assistant: ```c
void c_nb_step(unsigned long ipos, unsigned long ivel, float dt, int n_bodies) {
  float *pos = (float *)ipos;
  float *vel = (float *)ivel;
  int i;
  int j;
  for (i = 0; i < n_bodies; i++) {
    double f_x = 0.0;
    double f_y = 0.0;
    for (j = 0; j < n_bodies; j++) {
      double d_x;
      double d_y;
      double dist_tmp;
      double distance;
      double force;
      if (i == j) {
        continue;
      }
      d_x = pos[i * 4] - pos[j * 4];
      d_y = pos[i * 4 + 1] - pos[j * 4 + 1];
      dist_tmp = (d_x * d_x) + (d_y * d_y);
      distance = sqrt(dist_tmp);
      force = 6.67428e-11 * ((pos[i * 4 + 3] * pos[j * 4 + 3]) / dist_tmp);
      f_x -= force * (d_x / distance);
      f_y -= force * (d_y / distance);
    }
    vel[i * 4] += dt * (f_x / pos[i * 4 + 3]);
    vel[i * 4 + 1] += dt * (f_y / pos[i * 4 + 3]);
    pos[i * 4] += dt * vel[i * 4];
    pos[i * 4 + 1] += dt * vel[i * 4 + 1];
  }
}
```