user: Please show me the C implementation that matches the assembly code listed below:

```asm
<autocorr>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %esi,-0x4c(%rbp)
  mov    %edx,-0x50(%rbp)
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x20(%rbp)
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movl   $0x0,-0x30(%rbp)
  movl   $0x0,-0x2c(%rbp)
  movl   $0x0,-0x28(%rbp)
  movl   $0x0,-0x24(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L149
L45:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  movsd  -0x20(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x20(%rbp)
  addl   $0x1,-0x38(%rbp)
L149:
  mov    -0x38(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L45
  pxor   %xmm1,%xmm1
  cvtsi2sdl -0x4c(%rbp),%xmm1
  movsd  -0x20(%rbp),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x20(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L120
L93:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  subsd  -0x20(%rbp),%xmm0
  movsd  %xmm0,(%rax)
  addl   $0x1,-0x38(%rbp)
L120:
  mov    -0x38(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L93
  movl   $0x0,-0x38(%rbp)
  jmp    L51
L167:
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x38(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  -0x18(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  addl   $0x1,-0x38(%rbp)
L51:
  mov    -0x38(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L167
  pxor   %xmm1,%xmm1
  cvtsi2sdl -0x4c(%rbp),%xmm1
  movsd  -0x18(%rbp),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x18(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L114
L170:
  pxor   %xmm0,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movl   $0x0,-0x34(%rbp)
  jmp    L63
L38:
  mov    -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm1
  mov    -0x38(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x34(%rbp),%eax
  cltq
  add    %rdx,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movsd  (%rax),%xmm0
  mulsd  %xmm1,%xmm0
  movsd  -0x10(%rbp),%xmm1
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  addl   $0x1,-0x34(%rbp)
L63:
  mov    -0x4c(%rbp),%eax
  sub    -0x38(%rbp),%eax
  cmp    %eax,-0x34(%rbp)
  jl     L38
  mov    -0x4c(%rbp),%eax
  sub    -0x38(%rbp),%eax
  pxor   %xmm0,%xmm0
  cvtsi2sd %eax,%xmm0
  movapd %xmm0,%xmm1
  mulsd  -0x18(%rbp),%xmm1
  movsd  -0x10(%rbp),%xmm0
  divsd  %xmm1,%xmm0
  movsd  %xmm0,-0x10(%rbp)
  movsd  -0x10(%rbp),%xmm0
  movq   D37(%rip),%xmm1
  andpd  %xmm0,%xmm1
  movsd  D49(%rip),%xmm0
  comisd %xmm1,%xmm0
  jb     L12
  addl   $0x1,-0x30(%rbp)
L12:
  cmpl   $0x1,-0x30(%rbp)
  jle    L107
  movl   $0x1,-0x2c(%rbp)
L107:
  cmpl   $0x0,-0x50(%rbp)
  je     L92
  mov    -0x10(%rbp),%rax
  movq   %rax,%xmm0
  call   <exp@plt>
  movq   %xmm0,%rax
  mov    -0x38(%rbp),%edx
  movq   %rax,%xmm0
  mov    %edx,%esi
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  cmpl   $0x0,-0x2c(%rbp)
  je     L136
  cmpl   $0x0,-0x24(%rbp)
  jne    L136
  pxor   %xmm2,%xmm2
  cvtsi2sdl -0x38(%rbp),%xmm2
  movsd  %xmm2,-0x58(%rbp)
  mov    -0x10(%rbp),%rax
  movq   %rax,%xmm0
  call   <exp@plt>
  movsd  D28(%rip),%xmm1
  subsd  %xmm0,%xmm1
  movsd  -0x58(%rbp),%xmm2
  divsd  %xmm1,%xmm2
  movq   %xmm2,%rax
  movq   %rax,%xmm0
  call   <ceil@plt>
  mov    %eax,-0x24(%rbp)
  jmp    L136
L92:
  mov    -0x10(%rbp),%rdx
  mov    -0x38(%rbp),%eax
  movq   %rdx,%xmm0
  mov    %eax,%esi
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  cmpl   $0x0,-0x2c(%rbp)
  jne    L136
  movsd  -0x8(%rbp),%xmm0
  addsd  -0x10(%rbp),%xmm0
  movsd  %xmm0,-0x8(%rbp)
L136:
  addl   $0x1,-0x38(%rbp)
L114:
  mov    -0x4c(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  cmp    %eax,-0x38(%rbp)
  jl     L170
  cmpl   $0x0,-0x50(%rbp)
  je     L116
  mov    -0x24(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  jmp    L133
L116:
  mov    -0x8(%rbp),%rax
  movq   %rax,%xmm0
  call   <ceil@plt>
  mov    %eax,-0x28(%rbp)
L133:
  mov    -0x28(%rbp),%eax
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: tag: D37
datatype: qword
name: extract_symbolic_data
arguments: tag: D49
datatype: f64
name: extract_symbolic_data
arguments: tag: D11
datatype: string
name: extract_symbolic_data
arguments: tag: D28
datatype: byte[8]

tool: D37: 9223372036854775807

tool: D49: 0.01

tool: D11: %d %f


tool: {"D28": [0x69,0x57,0x14,0x8b,0x0a,0xbf,0x05,0x40]}

assistant: ```c
int autocorr(double *dat, int num, int log_scale) {
  int i, j;
  double avg = 0;
  double norm = 0;
  double ac = 0;
  int hits = 0;
  int decayed = 0;
  double ac_integral;
  int corr_time = 0;
  int log_corr_time = 0;
  for (i = 0; i < num; i++)
    avg += *(dat + i);
  avg /= num;
  for (i = 0; i < num; i++)
    *(dat + i) -= avg;
  for (i = 0; i < num; i++) {
    norm += *(dat + i) * (*(dat + i));
  }
  norm /= num;
  for (i = 0; i < (num / 2); i++) {
    ac = 0;
    for (j = 0; j < (num - i); j++) {
      ac += *(dat + j) * (*(dat + i + j));
    }
    ac /= (num - i) * norm;
    if (fabs(ac) <= 0.01)
      ++hits;
    if (hits >= 2)
      decayed = 1;
    if (log_scale) {
      printf("%d %f\n", i, exp(ac));
      if (decayed && !log_corr_time) {
        log_corr_time = (int)(ceil(((double)i) / (exp(1.0) - exp(ac))));
      }
    } else {
      printf("%d %f\n", i, ac);
      if (!decayed)
        ac_integral += ac;
    }
  }
  if (log_scale)
    corr_time = log_corr_time;
  else
    corr_time = (int)ceil(ac_integral);
  return (corr_time);
}
```