user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rdx,%r9
  sub    %rsi,%r9
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rcx,%r13
  lea    0x1(%r9),%rcx
  push   %r12
  sub    %rdx,%r13
  mov    %rdx,%r12
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  lea    0x17(,%r9,8),%rax
  mov    %rsp,%rsi
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L3
L10:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L10
L3:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L50
L218:
  lea    0x0(,%r13,8),%r15
  mov    %rsp,%rsi
  mov    %rsp,%r10
  lea    0xf(%r15),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L225
L12:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L12
L225:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L214
L208:
  mov    %rsp,%r8
  test   %rcx,%rcx
  jle    L40
  lea    0x0(,%rcx,8),%rdx
  mov    %r10,%rdi
  lea    (%r14,%rbx,8),%rsi
  mov    %r8,-0x58(%rbp)
  mov    %r9,-0x50(%rbp)
  mov    %rcx,-0x48(%rbp)
  call   <memcpy@plt>
  test   %r13,%r13
  mov    -0x48(%rbp),%rcx
  mov    -0x50(%rbp),%r9
  mov    -0x58(%rbp),%r8
  mov    %rax,%r10
  jle    L165
  lea    0x8(%r14,%r12,8),%rsi
  mov    %r15,%rdx
  mov    %r8,%rdi
  mov    %rcx,-0x58(%rbp)
  mov    %r9,-0x48(%rbp)
  xor    %r12d,%r12d
  mov    %rax,-0x50(%rbp)
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r10
  mov    -0x48(%rbp),%r9
  mov    %rax,%r8
  mov    -0x58(%rbp),%rcx
  xor    %eax,%eax
  mov    (%r10),%rsi
  mov    (%r8),%rdx
  nopl   0x0(%rax)
L191:
  cmp    %rdx,%rsi
  jg     L177
L31:
  mov    %rsi,(%r14,%rbx,8)
  lea    0x1(%rax),%r15
  add    $0x1,%rbx
  cmp    %rax,%r9
  jle    L131
  cmp    %r12,%r13
  jle    L131
  mov    (%r10,%r15,8),%rsi
  mov    %r15,%rax
  cmp    %rdx,%rsi
  jle    L31
L177:
  mov    %rdx,(%r14,%rbx,8)
  add    $0x1,%r12
  add    $0x1,%rbx
  cmp    %rax,%rcx
  jle    L43
  cmp    %r12,%r13
  jle    L43
  mov    (%r8,%r12,8),%rdx
  jmp    L191
  nopl   0x0(%rax,%rax,1)
L50:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L218
  nopl   0x0(%rax,%rax,1)
L43:
  mov    %rax,%r15
L131:
  cmp    %r15,%rcx
  jle    L134
  mov    %rcx,%rdx
  lea    (%r14,%rbx,8),%rdi
  lea    (%r10,%r15,8),%rsi
  mov    %r8,-0x50(%rbp)
  sub    %r15,%rdx
  mov    %rcx,-0x48(%rbp)
  shl    $0x3,%rdx
  call   <memcpy@plt>
  mov    -0x48(%rbp),%rcx
  mov    -0x50(%rbp),%r8
  add    %rbx,%rcx
  sub    %r15,%rcx
  mov    %rcx,%rbx
L134:
  cmp    %r12,%r13
  jle    L51
L45:
  sub    %r12,%r13
  lea    (%r14,%rbx,8),%rdi
  lea    (%r8,%r12,8),%rsi
  lea    0x0(,%r13,8),%rdx
  call   <memcpy@plt>
L51:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L33
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L40:
  test   %r13,%r13
  jle    L165
  lea    0x8(%r14,%r12,8),%rsi
  mov    %r8,%rdi
  mov    %r15,%rdx
  xor    %r12d,%r12d
  call   <memcpy@plt>
  mov    %rax,%r8
  jmp    L45
  nopl   0x0(%rax,%rax,1)
L165:
  xor    %r12d,%r12d
  xor    %r15d,%r15d
  jmp    L131
L214:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L208
L33:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void merge(long long int arr[], long long int l, long long int m, long long int r) {
  long long int i, j, k;
  long long int n1 = m - l + 1;
  long long int n2 = r - m;
  long long int L[n1], R[n2];
  for (i = 0; i < n1; ++i)
    L[i] = arr[l + i];
  for (j = 0; j < n2; ++j)
    R[j] = arr[m + 1 + j];
  i = 0;
  j = 0;
  k = l;
  while (i < n1 && j < n2) {
    if (L[i] <= R[j]) {
      arr[k] = L[i];
      i++;
    } else {
      arr[k] = R[j];
      j++;
    }
    k++;
  }
  while (i < n1) {
    arr[k] = L[i];
    i++;
    k++;
  }
  while (j < n2) {
    arr[k] = R[j];
    j++;
    k++;
  }
}
```