user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<merge>:
  endbr64
  push   %rbp
  mov    %rdi,%r8
  mov    %rsp,%rbp
  push   %r15
  mov    %ecx,%r15d
  push   %r14
  sub    %edx,%r15d
  push   %r13
  movslq %esi,%r13
  push   %r12
  push   %rbx
  mov    %edx,%ebx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  mov    %edx,%eax
  mov    %rsp,%rsi
  sub    %r13d,%eax
  lea    0x1(%rax),%ecx
  mov    %eax,-0x48(%rbp)
  movslq %ecx,%rax
  lea    0xf(,%rax,4),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L170
L7:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L7
L170:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L56
L23:
  movslq %r15d,%r12
  mov    %rsp,%rsi
  mov    %rsp,%r10
  lea    0xf(,%r12,4),%rax
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rsi
  and    $0xfffffffffffffff0,%rdx
  cmp    %rsi,%rsp
  je     L101
L163:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rsi,%rsp
  jne    L163
L101:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L75
L3:
  mov    %rsp,%r14
  test   %ecx,%ecx
  jle    L111
  mov    -0x48(%rbp),%eax
  mov    %r10,%rdi
  mov    %ecx,-0x58(%rbp)
  mov    %r8,-0x50(%rbp)
  lea    0x4(,%rax,4),%rdx
  movslq %r13d,%rax
  lea    (%r8,%rax,4),%rsi
  call   <memcpy@plt>
  test   %r15d,%r15d
  mov    -0x50(%rbp),%r8
  mov    -0x58(%rbp),%ecx
  mov    %rax,%r10
  jle    L24
  add    $0x1,%ebx
  mov    %r14,%rdi
  add    $0x1,%r13d
  mov    %ecx,-0x5c(%rbp)
  movslq %ebx,%rbx
  lea    0x0(,%r12,4),%rdx
  mov    %r8,-0x50(%rbp)
  xor    %r12d,%r12d
  lea    (%r8,%rbx,4),%rsi
  mov    %rax,-0x58(%rbp)
  xor    %ebx,%ebx
  call   <memcpy@plt>
  mov    -0x50(%rbp),%r8
  mov    -0x58(%rbp),%r10
  movslq %r13d,%rax
  mov    -0x5c(%rbp),%ecx
  jmp    L45
  nop
L39:
  add    $0x1,%r12d
L120:
  mov    %edx,-0x4(%r8,%rax,4)
  movslq %eax,%r13
  add    $0x1,%rax
  cmp    %ecx,%r12d
  jge    L145
  cmp    %r15d,%ebx
  jge    L145
L45:
  movslq %r12d,%rdx
  movslq %ebx,%rsi
  mov    (%r10,%rdx,4),%edx
  mov    (%r14,%rsi,4),%esi
  cmp    %esi,%edx
  jle    L39
  add    $0x1,%ebx
  mov    %esi,%edx
  jmp    L120
  nopl   0x0(%rax,%rax,1)
L56:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L23
  nopl   0x0(%rax,%rax,1)
L24:
  xor    %ebx,%ebx
  xor    %r12d,%r12d
  nopl   (%rax)
L145:
  cmp    %r12d,%ecx
  mov    %ecx,-0x50(%rbp)
  jle    L93
  movslq %r13d,%rax
  mov    %r8,-0x58(%rbp)
  lea    (%r8,%rax,4),%rdi
  mov    -0x48(%rbp),%eax
  sub    %r12d,%eax
  lea    0x4(,%rax,4),%rdx
  movslq %r12d,%rax
  lea    (%r10,%rax,4),%rsi
  call   <memcpy@plt>
  mov    -0x50(%rbp),%ecx
  mov    -0x58(%rbp),%r8
  add    %r13d,%ecx
  sub    %r12d,%ecx
  movslq %ecx,%r13
L93:
  cmp    %ebx,%r15d
  jle    L159
L65:
  sub    $0x1,%r15d
  lea    (%r8,%r13,4),%rdi
  sub    %ebx,%r15d
  movslq %ebx,%rbx
  lea    0x4(,%r15,4),%rdx
  lea    (%r14,%rbx,4),%rsi
  call   <memcpy@plt>
L159:
  mov    -0x38(%rbp),%rax
  sub    %fs:0x28,%rax
  jne    L161
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
L111:
  test   %r15d,%r15d
  jle    L24
  add    $0x1,%ebx
  lea    0x0(,%r12,4),%rdx
  mov    %r14,%rdi
  mov    %r8,-0x48(%rbp)
  movslq %ebx,%rbx
  lea    (%r8,%rbx,4),%rsi
  xor    %ebx,%ebx
  call   <memcpy@plt>
  mov    -0x48(%rbp),%r8
  jmp    L65
L75:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L3
L161:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void merge(int *a, int left, int mid, int right) {
  int i, j, k;
  int n1, n2;
  n1 = mid - left + 1;
  n2 = right - mid;
  int left_arr[n1], right_arr[n2];
  i = 0;
  j = 0;
  for (i = 0; i < n1; i++) {
    left_arr[i] = a[left + i];
  }
  for (j = 0; j < n2; j++) {
    right_arr[j] = a[mid + 1 + j];
  }
  i = 0;
  j = 0;
  k = left;
  while (i < n1 && j < n2) {
    if (left_arr[i] <= right_arr[j]) {
      a[k] = left_arr[i];
      i++;
    } else {
      a[k] = right_arr[j];
      j++;
    }
    k++;
  }
  while (i < n1) {
    a[k] = left_arr[i];
    k++;
    i++;
  }
  while (j < n2) {
    a[k] = right_arr[j];
    k++;
    j++;
  }
  return;
}
```