user: Demonstrate the C code that generates the assembly output below:

```asm
<SKP_Silk_residual_energy_FIX>:
  endbr64
  push   %r15
  mov    %rcx,%r15
  lea    0x40(%rcx),%rcx
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %r9d,%r13d
  push   %r12
  mov    %r14,%r12
  push   %rbp
  push   %rbx
  mov    %rsi,%rbx
  lea    0x4(%rbx),%r10
  sub    $0x2b8,%rsp
  mov    %rdx,(%rsp)
  mov    0x2f0(%rsp),%esi
  movslq 0x2f0(%rsp),%rdx
  lea    (%rsi,%rsi,1),%r11d
  lea    0x80(%rsp),%rsi
  mov    %fs:0x28,%rax
  mov    %rax,0x2a8(%rsp)
  mov    %r9d,%eax
  mov    %rsi,0x30(%rsp)
  mov    %r8,0x48(%rsp)
  add    0x2f0(%rsp),%eax
  mov    %rcx,0x20(%rsp)
  lea    0x60(%rsp),%rcx
  lea    (%rax,%rax,1),%edi
  cltq
  mov    %r14,0x38(%rsp)
  mov    %rcx,%r14
  mov    %edi,0xc(%rsp)
  lea    (%rsi,%rdx,2),%rdi
  lea    0x0(,%rax,4),%rsi
  lea    (%rdi,%rax,2),%rax
  mov    %rdi,0x18(%rsp)
  mov    %rax,0x28(%rsp)
  mov    %rsi,0x10(%rsp)
  lea    0x5c(%rsp),%rsi
  mov    %rbx,0x40(%rsp)
  mov    %rsi,%rbp
  mov    %r10,%rbx
L3:
  mov    %r11d,%edx
  xor    %esi,%esi
  mov    %r14,%rdi
  mov    %r11d,0x8(%rsp)
  call   <memset@plt>
  mov    0xc(%rsp),%r8d
  mov    %r15,%rsi
  mov    %r14,%rdx
  mov    0x2f0(%rsp),%r9d
  mov    (%rsp),%rdi
  add    $0x20,%r15
  add    $0x8,%rbx
  mov    0x30(%rsp),%rcx
  call   <SKP_Silk_LPC_analysis_filter@plt>
  mov    0x18(%rsp),%rdx
  mov    %r12,%rdi
  mov    %r13d,%ecx
  mov    %rbp,%rsi
  call   <SKP_Silk_sum_sqr_shift@plt>
  mov    0x5c(%rsp),%eax
  mov    %r13d,%ecx
  mov    %rbp,%rsi
  mov    0x28(%rsp),%rdx
  lea    0x4(%r12),%rdi
  add    $0x8,%r12
  neg    %eax
  mov    %eax,-0xc(%rbx)
  call   <SKP_Silk_sum_sqr_shift@plt>
  mov    0x5c(%rsp),%eax
  mov    0x10(%rsp),%rcx
  add    %rcx,(%rsp)
  mov    0x8(%rsp),%r11d
  neg    %eax
  mov    %eax,-0x8(%rbx)
  cmp    0x20(%rsp),%r15
  jne    L3
  mov    0x38(%rsp),%r14
  mov    0x40(%rsp),%rbx
  xor    %r12d,%r12d
  mov    0x48(%rsp),%rbp
L16:
  mov    (%r14,%r12,1),%edi
  call   <SKP_Silk_CLZ32@plt>
  mov    0x0(%rbp,%r12,1),%edi
  lea    -0x1(%rax),%r13d
  call   <SKP_Silk_CLZ32@plt>
  mov    0x0(%rbp,%r12,1),%edx
  mov    (%r14,%r12,1),%esi
  sub    $0x1,%eax
  mov    %eax,%ecx
  lea    -0x40(%r13,%rax,2),%eax
  shl    %cl,%edx
  mov    %r13d,%ecx
  movslq %edx,%rdx
  shl    %cl,%esi
  imul   %rdx,%rdx
  movslq %esi,%rsi
  sar    $0x20,%rdx
  imul   %rsi,%rdx
  sar    $0x20,%rdx
  mov    %edx,(%r14,%r12,1)
  add    %eax,(%rbx,%r12,1)
  add    $0x4,%r12
  cmp    $0x10,%r12
  jne    L16
  mov    0x2a8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L11
  add    $0x2b8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L11:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void SKP_Silk_residual_energy_FIX(int nrgs[4], int nrgsQ[4], const short x[], short a_Q12[2][16], const int gains[4], const int subfr_length, const int LPC_order) {
  int offset, i, j, rshift, lz1, lz2;
  short *LPC_res_ptr, LPC_res[((20 * 24) + 4 * 16) / 2];
  const short *x_ptr;
  short S[16];
  int tmp32;
  x_ptr = x;
  offset = LPC_order + subfr_length;
  for (i = 0; i < 2; i++) {
    memset((S), (0), (LPC_order * sizeof(short)));
    SKP_Silk_LPC_analysis_filter(x_ptr, a_Q12[i], S, LPC_res, (4 >> 1) * offset, LPC_order);
    LPC_res_ptr = LPC_res + LPC_order;
    for (j = 0; j < (4 >> 1); j++) {
      SKP_Silk_sum_sqr_shift(&nrgs[i * (4 >> 1) + j], &rshift, LPC_res_ptr, subfr_length);
      nrgsQ[i * (4 >> 1) + j] = -rshift;
      LPC_res_ptr += offset;
    }
    x_ptr += (4 >> 1) * offset;
  }
  for (i = 0; i < 4; i++) {
    lz1 = SKP_Silk_CLZ32(nrgs[i]) - 1;
    lz2 = SKP_Silk_CLZ32(gains[i]) - 1;
    tmp32 = ((gains[i]) << (lz2));
    tmp32 = (int)((((long long)((tmp32)) * ((tmp32)))) >> (32));
    nrgs[i] = (int)((((long long)((tmp32)) * ((((nrgs[i]) << (lz1)))))) >> (32));
    nrgsQ[i] += lz1 + 2 * lz2 - 32 - 32;
  }
}
```