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

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  sub    $0x60,%rsp
  mov    %rdi,-0x68(%rbp)
  mov    %esi,-0x6c(%rbp)
  mov    %edx,-0x70(%rbp)
  mov    %ecx,-0x74(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x28(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%rsi
  mov    -0x70(%rbp),%eax
  sub    -0x6c(%rbp),%eax
  add    $0x1,%eax
  mov    %eax,-0x50(%rbp)
  mov    -0x74(%rbp),%eax
  sub    -0x70(%rbp),%eax
  mov    %eax,-0x4c(%rbp)
  mov    -0x50(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x48(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r14
  mov    $0x0,%r15d
  movslq %eax,%rdx
  mov    %rdx,%r12
  mov    $0x0,%r13d
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L199:
  cmp    %rdx,%rsp
  je     L60
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L199
L60:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L62
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L62:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x4c(%rbp),%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x38(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r8
  mov    $0x0,%r9d
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%edi
  mov    $0x0,%edx
  div    %rdi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L95:
  cmp    %rdx,%rsp
  je     L73
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L95
L73:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L63
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L63:
  mov    %rsp,%rax
  add    $0x3,%rax
  shr    $0x2,%rax
  shl    $0x2,%rax
  mov    %rax,-0x30(%rbp)
  movl   $0x0,-0x5c(%rbp)
  jmp    L77
L143:
  mov    -0x6c(%rbp),%edx
  mov    -0x5c(%rbp),%eax
  add    %edx,%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ecx
  mov    -0x40(%rbp),%rax
  mov    -0x5c(%rbp),%edx
  movslq %edx,%rdx
  mov    %ecx,(%rax,%rdx,4)
  addl   $0x1,-0x5c(%rbp)
L77:
  mov    -0x5c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jl     L143
  movl   $0x0,-0x58(%rbp)
  jmp    L58
L128:
  mov    -0x70(%rbp),%edx
  mov    -0x58(%rbp),%eax
  add    %edx,%eax
  cltq
  add    $0x1,%rax
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%ecx
  mov    -0x30(%rbp),%rax
  mov    -0x58(%rbp),%edx
  movslq %edx,%rdx
  mov    %ecx,(%rax,%rdx,4)
  addl   $0x1,-0x58(%rbp)
L58:
  mov    -0x58(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L128
  movl   $0x0,-0x5c(%rbp)
  movl   $0x0,-0x58(%rbp)
  mov    -0x6c(%rbp),%eax
  mov    %eax,-0x54(%rbp)
  jmp    L69
L146:
  mov    -0x40(%rbp),%rax
  mov    -0x5c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%ecx
  mov    -0x30(%rbp),%rax
  mov    -0x58(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  cmp    %eax,%ecx
  jge    L64
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x40(%rbp),%rax
  mov    -0x5c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,(%rcx)
  addl   $0x1,-0x5c(%rbp)
  jmp    L11
L64:
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x30(%rbp),%rax
  mov    -0x58(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,(%rcx)
  addl   $0x1,-0x58(%rbp)
L11:
  addl   $0x1,-0x54(%rbp)
L69:
  mov    -0x5c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jge    L37
  mov    -0x58(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L146
  jmp    L37
L6:
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x40(%rbp),%rax
  mov    -0x5c(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,(%rcx)
  addl   $0x1,-0x5c(%rbp)
  addl   $0x1,-0x54(%rbp)
L37:
  mov    -0x5c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jl     L6
  jmp    L113
L53:
  mov    -0x54(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x68(%rbp),%rax
  lea    (%rdx,%rax,1),%rcx
  mov    -0x30(%rbp),%rax
  mov    -0x58(%rbp),%edx
  movslq %edx,%rdx
  mov    (%rax,%rdx,4),%eax
  mov    %eax,(%rcx)
  addl   $0x1,-0x58(%rbp)
  addl   $0x1,-0x54(%rbp)
L113:
  mov    -0x58(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L53
  mov    %rsi,%rsp
  nop
  mov    -0x28(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L16
  call   <__stack_chk_fail@plt>
L16:
  lea    -0x20(%rbp),%rsp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
void merge(int A[], int start, int mid, int end) {
  int sizeL = mid - start + 1;
  int sizeM = end - mid;
  int L[sizeL], M[sizeM];
  int i, j, k;
  for (i = 0; i < sizeL; i++) {
    L[i] = A[start + i];
  }
  for (j = 0; j < sizeM; j++) {
    M[j] = A[mid + j + 1];
  }
  i = 0;
  j = 0;
  k = start;
  while ((i < sizeL) && (j < sizeM)) {
    if (L[i] < M[j]) {
      A[k] = L[i];
      i++;
    } else {
      A[k] = M[j];
      j++;
    }
    k++;
  }
  while (i < sizeL) {
    A[k] = L[i];
    i++;
    k++;
  }
  while (j < sizeM) {
    A[k] = M[j];
    j++;
    k++;
  }
}
```