user: What is the c source code of the assembly code below:

```asm
<lpf_int>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  movsd  %xmm0,0x28(%rsp)
  movq   %xmm1,%r15
  movsd  %xmm2,(%rsp)
  movsd  %xmm3,0x20(%rsp)
  movsd  %xmm4,0x18(%rsp)
  movsd  %xmm5,0x10(%rsp)
  movsd  %xmm6,0x8(%rsp)
  lea    D48(%rip),%rsi
  call   <fopen@plt>
  mov    %rax,%r14
  movsd  0x28(%rsp),%xmm0
  comisd D33(%rip),%xmm0
  ja     L38
L31:
  movsd  0x28(%rsp),%xmm0
  comisd D33(%rip),%xmm0
  ja     L30
L17:
  mov    0x18(%rsp),%rbx
  mov    0x8(%rsp),%rbp
  movsd  0x20(%rsp),%xmm1
  movsd  0x10(%rsp),%xmm2
  movapd %xmm1,%xmm0
  addsd  %xmm1,%xmm0
  mulsd  %xmm1,%xmm0
  addsd  D86(%rip),%xmm0
  movapd %xmm2,%xmm1
  addsd  %xmm2,%xmm1
  mulsd  %xmm2,%xmm1
  addsd  %xmm1,%xmm0
  cvttsd2si %xmm0,%edi
  call   <sqrt@plt>
  mov    %eax,%ecx
  movq   %rbx,%xmm0
  mulsd  %xmm0,%xmm0
  movq   %rbp,%xmm1
  mulsd  %xmm1,%xmm1
  addsd  %xmm1,%xmm0
  mulsd  D49(%rip),%xmm0
  mov    $0xffffffff,%eax
  cltd
  idiv   %ecx
  pxor   %xmm1,%xmm1
  cvtsi2sd %eax,%xmm1
  addsd  %xmm1,%xmm0
  movq   %xmm0,%rbx
  movapd %xmm0,%xmm5
  movsd  0x8(%rsp),%xmm4
  movsd  0x10(%rsp),%xmm3
  movsd  0x18(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm0
  lea    D24(%rip),%rbp
  mov    %rbp,%rdi
  call   <printf@plt>
  movq   %rbx,%xmm5
  movsd  0x8(%rsp),%xmm4
  movsd  0x10(%rsp),%xmm3
  movsd  0x18(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm0
  mov    %rbp,%rsi
  mov    %r14,%rdi
  call   <fprintf@plt>
  movsd  D49(%rip),%xmm6
  mulsd  (%rsp),%xmm6
  movq   %xmm6,%rbx
  lea    0x18(%rsp),%rdi
  movapd %xmm6,%xmm1
  movsd  0x20(%rsp),%xmm0
  call   <advance_vel@plt>
  lea    0x8(%rsp),%rdi
  movq   %rbx,%xmm1
  movsd  0x10(%rsp),%xmm0
  call   <advance_vel@plt>
  movq   %r15,%xmm6
  comisd 0x28(%rsp),%xmm6
  jbe    L53
  lea    0x28(%rsp),%r13
  mov    %rbp,%r12
L10:
  lea    0x18(%rsp),%rsi
  lea    0x20(%rsp),%rdi
  movsd  (%rsp),%xmm0
  mov    %r13,%rdx
  call   <leapfrog@plt>
  lea    0x8(%rsp),%rsi
  lea    0x10(%rsp),%rdi
  movsd  (%rsp),%xmm0
  mov    %r13,%rdx
  call   <leapfrog@plt>
  mov    0x18(%rsp),%rbx
  mov    0x8(%rsp),%rbp
  movsd  0x20(%rsp),%xmm1
  movsd  0x10(%rsp),%xmm2
  movapd %xmm1,%xmm0
  addsd  %xmm1,%xmm0
  mulsd  %xmm1,%xmm0
  addsd  D86(%rip),%xmm0
  movapd %xmm2,%xmm1
  addsd  %xmm2,%xmm1
  mulsd  %xmm2,%xmm1
  addsd  %xmm1,%xmm0
  cvttsd2si %xmm0,%edi
  call   <sqrt@plt>
  mov    %eax,%ecx
  movq   %rbx,%xmm0
  mulsd  %xmm0,%xmm0
  movq   %rbp,%xmm1
  mulsd  %xmm1,%xmm1
  addsd  %xmm1,%xmm0
  mulsd  D49(%rip),%xmm0
  mov    $0xffffffff,%eax
  cltd
  idiv   %ecx
  pxor   %xmm1,%xmm1
  cvtsi2sd %eax,%xmm1
  addsd  %xmm1,%xmm0
  movq   %xmm0,%rbx
  movapd %xmm0,%xmm5
  movsd  0x8(%rsp),%xmm4
  movsd  0x10(%rsp),%xmm3
  movsd  0x18(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm0
  mov    %r12,%rdi
  call   <printf@plt>
  movq   %rbx,%xmm5
  movsd  0x8(%rsp),%xmm4
  movsd  0x10(%rsp),%xmm3
  movsd  0x18(%rsp),%xmm2
  movsd  0x20(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm0
  mov    %r12,%rsi
  mov    %r14,%rdi
  call   <fprintf@plt>
  movq   %r15,%xmm7
  comisd 0x28(%rsp),%xmm7
  ja     L10
L53:
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L38:
  lea    0x18(%rsp),%rdi
  movsd  (%rsp),%xmm1
  mulsd  D82(%rip),%xmm1
  movsd  0x20(%rsp),%xmm0
  call   <advance_vel@plt>
  jmp    L31
L30:
  lea    0x8(%rsp),%rdi
  movsd  (%rsp),%xmm1
  mulsd  D82(%rip),%xmm1
  movsd  0x10(%rsp),%xmm0
  call   <advance_vel@plt>
  jmp    L17
```

tool_calls: name: retrieve_data
arguments: data_label: D48
type_infered: string
name: retrieve_data
arguments: data_label: D33
type_infered: byte[16]
name: retrieve_data
arguments: data_label: D86
type_infered: byte[8]
name: retrieve_data
arguments: data_label: D49
type_infered: f64
name: retrieve_data
arguments: data_label: D24
type_infered: string
name: retrieve_data
arguments: data_label: D82
type_infered: byte[8]

tool: D48: w

tool: {"D33": [0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0xbf]}

tool: {"D86": [0x00,0x00,0x00,0x00,0x00,0x00,0xf0,0x3f]}

tool: D49: 0.5

tool: D24: %f	%e	%e	%e	%e	%e


tool: {"D82": [0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0xbf]}

assistant: ```c
void lpf_int(char *fout, double t, double tmax, double step, double x, double zx, double v, double zv) {
  int i;
  double E;
  FILE *file;
  file = fopen(fout, "w");
  if (t > 0)
    advance_vel(x, &zx, -0.5 * step);
  if (t > 0)
    advance_vel(v, &zv, -0.5 * step);
  E = (zx * zx + zv * zv) / 2.0 + (-1) / (sqrt(1 + 2 * x * x + 2 * v * v));
  printf("%f\t%e\t%e\t%e\t%e\t%e\n", t, x, zx, v, zv, E);
  fprintf(file, "%f\t%e\t%e\t%e\t%e\t%e\n", t, x, zx, v, zv, E);
  advance_vel(x, &zx, 0.5 * step);
  advance_vel(v, &zv, 0.5 * step);
  while (t < tmax) {
    leapfrog(&x, &zx, &t, step);
    leapfrog(&v, &zv, &t, step);
    E = (zx * zx + zv * zv) / 2.0 + (-1) / (sqrt(1 + 2 * x * x + 2 * v * v));
    printf("%f\t%e\t%e\t%e\t%e\t%e\n", t, x, zx, v, zv, E);
    fprintf(file, "%f\t%e\t%e\t%e\t%e\t%e\n", t, x, zx, v, zv, E);
  }
}
```