user: Translate the below assembly code into C programming language:

```asm
<SKP_Silk_LTP_analysis_filter_FIX>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x68,%rsp
  mov    %rcx,0x30(%rsp)
  lea    0x4e(%rsp),%r13
  lea    0x56(%rsp),%r11
  mov    %r8,0x38(%rsp)
  mov    %fs:0x28,%rax
  mov    %rax,0x58(%rsp)
  mov    %r9d,%eax
  movslq %r9d,%r9
  mov    %rdx,0x10(%rsp)
  movq   $0x0,0x8(%rsp)
  add    0xa0(%rsp),%eax
  mov    %eax,0x2c(%rsp)
  cltq
  mov    %rax,(%rsp)
  add    %rax,%rax
  mov    %rax,0x18(%rsp)
  lea    (%r9,%r9,1),%rax
  mov    %rax,0x20(%rsp)
L63:
  mov    0x8(%rsp),%rsi
  mov    0x30(%rsp),%rax
  mov    %rbp,%r9
  movslq (%rax,%rsi,4),%rax
  mov    0x10(%rsp),%rsi
  add    %rax,%rax
  sub    %rax,%r9
  mov    (%rsi),%rax
  mov    %rax,0x0(%r13)
  movzwl 0x8(%rsi),%eax
  mov    %ax,0x8(%r13)
  mov    0x2c(%rsp),%eax
  test   %eax,%eax
  jle    L62
  mov    0x38(%rsp),%rax
  mov    0x8(%rsp),%rsi
  xor    %r10d,%r10d
  movswl 0x4e(%rsp),%r15d
  mov    (%rax,%rsi,4),%r12d
  mov    %r12d,%eax
  movzwl %r12w,%r12d
  shr    $0x10,%eax
  mov    %eax,%r14d
  nopl   0x0(%rax)
L20:
  movzwl 0x0(%rbp,%r10,2),%edi
  add    $0x2,%r9
  mov    %r13,%rdx
  mov    %di,(%rbx,%r10,2)
  movswl 0x2(%r9),%eax
  mov    %r9,%rsi
  imul   %r15d,%eax
L14:
  movswl (%rsi),%ecx
  movswl 0x2(%rdx),%r8d
  add    $0x2,%rdx
  sub    $0x2,%rsi
  imul   %r8d,%ecx
  add    %ecx,%eax
  cmp    %r11,%rdx
  jne    L14
  sar    $0xd,%eax
  movswl %di,%edx
  add    $0x1,%eax
  sar    %eax
  sub    %eax,%edx
  cmp    $0x7fff,%edx
  jg     L83
  cmp    $0xffff8000,%edx
  jl     L55
  sub    %eax,%edi
  movswl %di,%eax
L42:
  imul   %r12d,%eax
  imul   %r14d,%edi
  sar    $0x10,%eax
  add    %eax,%edi
  mov    %di,(%rbx,%r10,2)
  add    $0x1,%r10
  cmp    %r10,(%rsp)
  jne    L20
L62:
  addq   $0x1,0x8(%rsp)
  mov    0x8(%rsp),%rax
  addq   $0xa,0x10(%rsp)
  add    0x18(%rsp),%rbx
  add    0x20(%rsp),%rbp
  cmp    $0x4,%rax
  jne    L63
  mov    0x58(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L31
  add    $0x68,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L83:
  mov    $0x7fff,%eax
  mov    $0x7fff,%edi
  jmp    L42
  nopl   0x0(%rax)
L55:
  mov    $0xffff8000,%eax
  mov    $0xffff8000,%edi
  jmp    L42
L31:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void SKP_Silk_LTP_analysis_filter_FIX(short *LTP_res, const short *x, const short LTPCoef_Q14[5 * 4], const int pitchL[4], const int invGains_Q16[4], const int subfr_length, const int pre_length) {
  const short *x_ptr, *x_lag_ptr;
  short Btmp_Q14[5];
  short *LTP_res_ptr;
  int k, i, j;
  int LTP_est;
  x_ptr = x;
  LTP_res_ptr = LTP_res;
  for (k = 0; k < 4; k++) {
    x_lag_ptr = x_ptr - pitchL[k];
    for (i = 0; i < 5; i++) {
      Btmp_Q14[i] = LTPCoef_Q14[k * 5 + i];
    }
    for (i = 0; i < subfr_length + pre_length; i++) {
      LTP_res_ptr[i] = x_ptr[i];
      LTP_est = ((int)((short)(x_lag_ptr[5 / 2])) * (int)((short)(Btmp_Q14[0])));
      for (j = 1; j < 5; j++) {
        LTP_est = ((int)((unsigned int)((LTP_est)) + (unsigned int)(((int)((short)((x_lag_ptr[5 / 2 - j]))) * (int)((short)((Btmp_Q14[j])))))));
      }
      LTP_est = ((14) == 1 ? ((LTP_est) >> 1) + ((LTP_est)&1) : (((LTP_est) >> ((14) - 1)) + 1) >> 1);
      LTP_res_ptr[i] = (short)(((int)x_ptr[i] - LTP_est) > 0x7FFF ? 0x7FFF : (((int)x_ptr[i] - LTP_est) < ((short)0x8000) ? ((short)0x8000) : ((int)x_ptr[i] - LTP_est)));
      LTP_res_ptr[i] = ((((invGains_Q16[k]) >> 16) * (int)((short)(LTP_res_ptr[i]))) + ((((invGains_Q16[k]) & 0x0000FFFF) * (int)((short)(LTP_res_ptr[i]))) >> 16));
      x_lag_ptr++;
    }
    LTP_res_ptr += subfr_length + pre_length;
    x_ptr += subfr_length;
  }
}
```