user: What would the C source look like for the assembly code provided here?

```asm
<integrate_three_rk4>:
  endbr64
  push   %r15
  movapd %xmm0,%xmm4
  movapd %xmm0,%xmm2
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x238,%rsp
  movsd  D18(%rip),%xmm1
  divsd  D7(%rip),%xmm4
  mov    %rsi,0x10(%rsp)
  mov    %rdx,0x18(%rsp)
  mulsd  %xmm0,%xmm1
  movsd  (%rdi),%xmm0
  mov    %rcx,0x40(%rsp)
  mov    %r9d,0x3c(%rsp)
  mov    %fs:0x28,%rdx
  mov    %rdx,0x228(%rsp)
  xor    %edx,%edx
  movsd  %xmm0,(%rcx)
  movsd  0x18(%rdi),%xmm0
  movsd  %xmm4,0x8(%rsp)
  movsd  %xmm0,0x8(%rcx)
  movsd  0x30(%rdi),%xmm0
  movsd  %xmm0,0x10(%rcx)
  cmp    $0x1,%r8d
  jbe    L12
  lea    (%r8,%r8,2),%eax
  movl   $0x3,0x48(%rsp)
  mov    %rdi,%rbx
  lea    0xf0(%rsp),%r15
  mov    %eax,0x4c(%rsp)
  nop
L50:
  mov    0x3c(%rsp),%eax
  test   %eax,%eax
  je     L64
  movl   $0x0,0x38(%rsp)
  lea    0x140(%rsp),%r14
  lea    0x50(%rsp),%r11
  mov    %r15,%r9
  lea    0x1e0(%rsp),%r13
  lea    0xa0(%rsp),%rbp
  mov    %r13,%r15
  lea    0x190(%rsp),%r12
  mov    %r14,%r13
  mov    %r11,%r14
  nopl   (%rax)
L77:
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %r9,%rsi
  mov    %rbx,%rdi
  mov    %r9,0x20(%rsp)
  movsd  %xmm2,0x30(%rsp)
  movsd  %xmm1,0x28(%rsp)
  call   <derivs_three@plt>
  movsd  0x28(%rsp),%xmm1
  movsd  0x30(%rsp),%xmm2
  xor    %eax,%eax
  mov    0x20(%rsp),%r9
  nopl   0x0(%rax)
L6:
  movsd  (%r9,%rax,1),%xmm0
  mulsd  %xmm1,%xmm0
  addsd  (%rbx,%rax,1),%xmm0
  movsd  %xmm0,(%r14,%rax,1)
  add    $0x8,%rax
  cmp    $0x48,%rax
  jne    L6
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %r13,%rsi
  mov    %r14,%rdi
  mov    %r9,0x20(%rsp)
  movsd  %xmm1,0x30(%rsp)
  movsd  %xmm2,0x28(%rsp)
  call   <derivs_three@plt>
  movsd  0x30(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm2
  xor    %eax,%eax
  mov    0x20(%rsp),%r9
L66:
  movsd  0x0(%r13,%rax,1),%xmm0
  mulsd  %xmm1,%xmm0
  addsd  (%rbx,%rax,1),%xmm0
  movsd  %xmm0,0x0(%rbp,%rax,1)
  add    $0x8,%rax
  cmp    $0x48,%rax
  jne    L66
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  mov    %r9,0x20(%rsp)
  movsd  %xmm1,0x30(%rsp)
  movsd  %xmm2,0x28(%rsp)
  call   <derivs_three@plt>
  movsd  0x30(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm2
  xor    %eax,%eax
  mov    0x20(%rsp),%r9
  nopl   0x0(%rax)
L3:
  movsd  (%r12,%rax,1),%xmm0
  mulsd  %xmm2,%xmm0
  addsd  (%rbx,%rax,1),%xmm0
  movsd  %xmm0,0x0(%rbp,%rax,1)
  add    $0x8,%rax
  cmp    $0x48,%rax
  jne    L3
  mov    0x18(%rsp),%rcx
  mov    0x10(%rsp),%rdx
  mov    %r15,%rsi
  mov    %rbp,%rdi
  mov    %r9,0x20(%rsp)
  movsd  %xmm1,0x30(%rsp)
  movsd  %xmm2,0x28(%rsp)
  call   <derivs_three@plt>
  movsd  0x30(%rsp),%xmm1
  movsd  0x28(%rsp),%xmm2
  xor    %eax,%eax
  mov    0x20(%rsp),%r9
  nopl   0x0(%rax,%rax,1)
L43:
  movsd  0x0(%r13,%rax,1),%xmm0
  addsd  (%r12,%rax,1),%xmm0
  addsd  %xmm0,%xmm0
  addsd  (%r9,%rax,1),%xmm0
  addsd  (%r15,%rax,1),%xmm0
  mulsd  0x8(%rsp),%xmm0
  addsd  (%rbx,%rax,1),%xmm0
  movsd  %xmm0,(%rbx,%rax,1)
  add    $0x8,%rax
  cmp    $0x48,%rax
  jne    L43
  addl   $0x1,0x38(%rsp)
  mov    0x38(%rsp),%eax
  cmp    %eax,0x3c(%rsp)
  jne    L77
  mov    %r9,%r15
L64:
  movsd  (%rbx),%xmm0
  mov    0x48(%rsp),%eax
  mov    0x40(%rsp),%rdi
  mov    %rax,%rsi
  movsd  %xmm0,(%rdi,%rax,8)
  movsd  0x18(%rbx),%xmm0
  lea    0x1(%rax),%eax
  movsd  %xmm0,(%rdi,%rax,8)
  movsd  0x30(%rbx),%xmm0
  lea    0x2(%rsi),%eax
  add    $0x3,%esi
  mov    %esi,0x48(%rsp)
  movsd  %xmm0,(%rdi,%rax,8)
  cmp    %esi,0x4c(%rsp)
  jne    L50
L12:
  mov    0x228(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L39
  add    $0x238,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L39:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: unpack_data
arguments: tag: D18
datatype: byte[8]
name: unpack_data
arguments: tag: D7
datatype: f64

tool: {"D18": [0x00,0x00,0x00,0x00,0x00,0x00,0xe0,0x3f]}

tool: D7: 6

assistant: ```c
void integrate_three_rk4(double *y, const double *params, const double *coupling, double *output, const double dt, const unsigned N, const unsigned stride) {
  unsigned i, j, k;
  double dt2, dt6;
  double y1[3 * 3], y2[3 * 3], k1[3 * 3], k2[3 * 3], k3[3 * 3], k4[3 * 3];
  dt2 = dt / 2.;
  dt6 = dt / 6.;
  for (j = 0; j < 3; j++)
    output[j] = y[3 * j];
  for (i = 1; i < N; i++) {
    for (j = 0; j < stride; j++) {
      derivs_three(y, k1, params, coupling);
      for (k = 0; k < 3 * 3; k++)
        y1[k] = y[k] + k1[k] * dt2;
      derivs_three(y1, k2, params, coupling);
      for (k = 0; k < 3 * 3; k++)
        y2[k] = y[k] + k2[k] * dt2;
      derivs_three(y2, k3, params, coupling);
      for (k = 0; k < 3 * 3; k++)
        y2[k] = y[k] + k3[k] * dt;
      derivs_three(y2, k4, params, coupling);
      for (k = 0; k < 3 * 3; k++)
        y[k] += dt6 * (k1[k] + 2. * (k2[k] + k3[k]) + k4[k]);
    }
    for (j = 0; j < 3; j++)
      output[3 * i + j] = y[3 * j];
  }
}
```