user: Demonstrate the C code that generates the assembly output below:

```asm
<swapfunc>:
  endbr64
  mov    %rdi,%rax
  cmp    $0x1,%ecx
  jle    L146
  cmp    $0x1,%r8d
  jle    L52
  lea    0xf(%rax),%rcx
  lea    -0x1(%rdx),%rdi
  sub    %rsi,%rcx
  cmp    $0x1e,%rcx
  jbe    L191
  cmp    $0x6,%rdi
  jbe    L191
  cmp    $0xe,%rdi
  jbe    L155
  lea    -0x10(%rdx),%r8
  xor    %ecx,%ecx
  xor    %edi,%edi
  shr    $0x4,%r8
  add    $0x1,%r8
  nopl   0x0(%rax,%rax,1)
L224:
  movdqu (%rax,%rcx,1),%xmm0
  movdqu (%rsi,%rcx,1),%xmm2
  add    $0x1,%rdi
  movups %xmm2,(%rax,%rcx,1)
  movups %xmm0,(%rsi,%rcx,1)
  add    $0x10,%rcx
  cmp    %r8,%rdi
  jb     L224
  shl    $0x4,%r8
  mov    %rdx,%r9
  add    %r8,%rax
  add    %r8,%rsi
  sub    %r8,%r9
  mov    %rax,%rdi
  mov    %rsi,%rcx
  cmp    %r8,%rdx
  je     L244
  lea    -0x1(%r9),%r8
  mov    %r9,%rdx
  cmp    $0x6,%r8
  jbe    L83
L105:
  mov    (%rsi),%r10
  mov    (%rax),%r8
  mov    %r10,(%rax)
  mov    %rdx,%rax
  and    $0xfffffffffffffff8,%rax
  mov    %r8,(%rsi)
  sub    %rax,%r9
  add    %rax,%rdi
  add    %rax,%rcx
  cmp    %rax,%rdx
  je     L244
  lea    -0x1(%r9),%r8
L83:
  movzbl (%rdi),%eax
  movzbl (%rcx),%edx
  mov    %dl,(%rdi)
  mov    %al,(%rcx)
  test   %r8,%r8
  je     L244
  movzbl 0x1(%rdi),%eax
  movzbl 0x1(%rcx),%edx
  mov    %dl,0x1(%rdi)
  mov    %al,0x1(%rcx)
  cmp    $0x2,%r9
  je     L244
  movzbl 0x2(%rdi),%eax
  movzbl 0x2(%rcx),%edx
  mov    %dl,0x2(%rdi)
  mov    %al,0x2(%rcx)
  cmp    $0x3,%r9
  je     L244
  movzbl 0x3(%rdi),%eax
  movzbl 0x3(%rcx),%edx
  mov    %dl,0x3(%rdi)
  mov    %al,0x3(%rcx)
  cmp    $0x4,%r9
  je     L244
  movzbl 0x4(%rdi),%eax
  movzbl 0x4(%rcx),%edx
  mov    %dl,0x4(%rdi)
  mov    %al,0x4(%rcx)
  cmp    $0x5,%r9
  je     L244
  movzbl 0x5(%rdi),%eax
  movzbl 0x5(%rcx),%edx
  mov    %dl,0x5(%rdi)
  mov    %al,0x5(%rcx)
  cmp    $0x6,%r9
  je     L244
  movzbl 0x6(%rdi),%eax
  movzbl 0x6(%rcx),%edx
  mov    %dl,0x6(%rdi)
  mov    %al,0x6(%rcx)
  ret
  cs nopw 0x0(%rax,%rax,1)
L52:
  lea    0xf(%rdi),%rcx
  shr    $0x2,%rdx
  sub    %rsi,%rcx
  cmp    $0x1e,%rcx
  jbe    L187
  cmp    $0x1,%rdx
  je     L187
  lea    -0x1(%rdx),%rcx
  cmp    $0x2,%rcx
  jbe    L185
  lea    -0x4(%rdx),%rdi
  xor    %ecx,%ecx
  xor    %r8d,%r8d
  shr    $0x2,%rdi
  add    $0x1,%rdi
  xchg   %ax,%ax
L33:
  movdqu (%rax,%rcx,1),%xmm0
  movdqu (%rsi,%rcx,1),%xmm3
  add    $0x1,%r8
  movups %xmm3,(%rax,%rcx,1)
  movups %xmm0,(%rsi,%rcx,1)
  add    $0x10,%rcx
  cmp    %rdi,%r8
  jb     L33
  lea    0x0(,%rdi,4),%r9
  shl    $0x4,%rdi
  lea    (%rax,%rdi,1),%r8
  lea    (%rsi,%rdi,1),%rcx
  cmp    %r9,%rdx
  je     L244
  sub    %r9,%rdx
  cmp    $0x1,%rdx
  je     L246
L265:
  lea    0x0(,%r9,4),%rdi
  add    %rdi,%rsi
  add    %rdi,%rax
  mov    (%rsi),%r9
  mov    (%rax),%rdi
  mov    %r9,(%rax)
  mov    %rdx,%rax
  and    $0xfffffffffffffffe,%rax
  mov    %rdi,(%rsi)
  lea    0x0(,%rax,4),%rsi
  add    %rsi,%r8
  add    %rsi,%rcx
  cmp    %rax,%rdx
  je     L244
L246:
  mov    (%r8),%eax
  mov    (%rcx),%edx
  mov    %edx,(%r8)
  mov    %eax,(%rcx)
  ret
L191:
  add    %rax,%rdx
  nopl   0x0(%rax,%rax,1)
L73:
  movzbl (%rax),%ecx
  movzbl (%rsi),%edi
  add    $0x1,%rax
  add    $0x1,%rsi
  mov    %dil,-0x1(%rax)
  mov    %cl,-0x1(%rsi)
  cmp    %rax,%rdx
  jne    L73
L244:
  ret
  nopl   0x0(%rax,%rax,1)
L146:
  shr    $0x3,%rdx
  mov    %rdx,%r8
  lea    0xf(%rdi),%rdx
  sub    %rsi,%rdx
  cmp    $0x1e,%rdx
  jbe    L84
  lea    -0x1(%r8),%rdx
  cmp    $0x1,%rdx
  jbe    L84
  lea    -0x2(%r8),%rcx
  xor    %edx,%edx
  xor    %edi,%edi
  shr    %rcx
  add    $0x1,%rcx
  nopl   (%rax)
L18:
  movdqu (%rax,%rdx,1),%xmm0
  movdqu (%rsi,%rdx,1),%xmm1
  add    $0x1,%rdi
  movups %xmm1,(%rax,%rdx,1)
  movups %xmm0,(%rsi,%rdx,1)
  add    $0x10,%rdx
  cmp    %rdi,%rcx
  ja     L18
  lea    (%rcx,%rcx,1),%rdx
  shl    $0x4,%rcx
  add    %rcx,%rax
  add    %rsi,%rcx
  cmp    %rdx,%r8
  je     L244
  mov    (%rax),%rdx
  mov    (%rcx),%rsi
  mov    %rsi,(%rax)
  mov    %rdx,(%rcx)
  ret
  nopw   0x0(%rax,%rax,1)
L84:
  xor    %ecx,%ecx
  nopw   0x0(%rax,%rax,1)
L6:
  mov    (%rax,%rcx,8),%rdx
  mov    (%rsi,%rcx,8),%rdi
  mov    %rdi,(%rax,%rcx,8)
  mov    %rdx,(%rsi,%rcx,8)
  add    $0x1,%rcx
  cmp    %rcx,%r8
  jne    L6
  ret
  nopw   0x0(%rax,%rax,1)
L187:
  xor    %ecx,%ecx
  nopw   0x0(%rax,%rax,1)
L162:
  mov    (%rax,%rcx,4),%edi
  mov    (%rsi,%rcx,4),%r8d
  mov    %r8d,(%rax,%rcx,4)
  mov    %edi,(%rsi,%rcx,4)
  add    $0x1,%rcx
  cmp    %rcx,%rdx
  jne    L162
  ret
L155:
  mov    %rsi,%rcx
  mov    %rax,%rdi
  mov    %rdx,%r9
  jmp    L105
L185:
  mov    %rsi,%rcx
  mov    %rdi,%r8
  xor    %r9d,%r9d
  jmp    L265
```

assistant: ```c
void swapfunc(char *a, char *b, size_t n, int swaptype_long, int swaptype_int) {
  if (swaptype_long <= 1) {
    size_t i = (n) / sizeof(long);
    long *pi = (long *)(a);
    long *pj = (long *)(b);
    do {
      long t = *pi;
      *pi++ = *pj;
      *pj++ = t;
    } while (--i > 0);
  } else if (swaptype_int <= 1) {
    size_t i = (n) / sizeof(int);
    int *pi = (int *)(a);
    int *pj = (int *)(b);
    do {
      int t = *pi;
      *pi++ = *pj;
      *pj++ = t;
    } while (--i > 0);
  } else {
    size_t i = (n) / sizeof(char);
    char *pi = (char *)(a);
    char *pj = (char *)(b);
    do {
      char t = *pi;
      *pi++ = *pj;
      *pj++ = t;
    } while (--i > 0);
  }
}
```