user: 请将以下的汇编代码转换成C语言代码:

```asm
<f>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x38(%rbp)
  xor    %eax,%eax
  lea    0xf(%rdi),%rax
  mov    %rsp,%rcx
  mov    %rax,%rdx
  and    $0xfffffffffffff000,%rax
  sub    %rax,%rcx
  and    $0xfffffffffffffff0,%rdx
  cmp    %rcx,%rsp
  je     L17
L54:
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  cmp    %rcx,%rsp
  jne    L54
L17:
  and    $0xfff,%edx
  sub    %rdx,%rsp
  test   %rdx,%rdx
  jne    L13
L255:
  mov    %rsp,%r13
  test   %rbx,%rbx
  je     L201
  mov    %rsp,%r15
  lea    (%rsp,%rbx,1),%r12
  mov    %rsp,%r14
L38:
  xor    %eax,%eax
  add    $0x1,%r14
  call   <rand@plt>
  cltd
  shr    $0x18,%edx
  add    %edx,%eax
  movzbl %al,%eax
  sub    %edx,%eax
  mov    %al,-0x1(%r14)
  cmp    %r12,%r14
  jne    L38
  lea    -0x1(%rbx),%rax
  cmp    $0xe,%rax
  jbe    L5
  pxor   %xmm1,%xmm1
  pxor   %xmm6,%xmm6
  pxor   %xmm4,%xmm4
  mov    %rbx,%rax
  and    $0xfffffffffffffff0,%rax
  add    %r15,%rax
  nopl   0x0(%rax,%rax,1)
L236:
  movdqu (%r15),%xmm0
  movdqa %xmm6,%xmm3
  add    $0x10,%r15
  pcmpgtb %xmm0,%xmm3
  movdqa %xmm0,%xmm2
  punpcklbw %xmm3,%xmm2
  punpckhbw %xmm3,%xmm0
  movdqa %xmm4,%xmm3
  pcmpgtw %xmm2,%xmm3
  movdqa %xmm2,%xmm5
  punpcklwd %xmm3,%xmm5
  punpckhwd %xmm3,%xmm2
  movdqa %xmm0,%xmm3
  paddd  %xmm5,%xmm1
  paddd  %xmm2,%xmm1
  movdqa %xmm4,%xmm2
  pcmpgtw %xmm0,%xmm2
  punpcklwd %xmm2,%xmm3
  punpckhwd %xmm2,%xmm0
  paddd  %xmm3,%xmm1
  paddd  %xmm0,%xmm1
  cmp    %rax,%r15
  jne    L236
  movdqa %xmm1,%xmm0
  mov    %rbx,%rdx
  psrldq $0x8,%xmm0
  and    $0xfffffffffffffff0,%rdx
  paddd  %xmm0,%xmm1
  movdqa %xmm1,%xmm0
  psrldq $0x4,%xmm0
  paddd  %xmm0,%xmm1
  movd   %xmm1,%eax
  test   $0xf,%bl
  je     L103
L94:
  movsbl 0x0(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x1(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x1(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x2(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x2(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x3(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x3(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x4(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x4(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x5(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x5(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x6(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x6(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x7(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x7(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x8(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x8(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0x9(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0x9(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0xa(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0xa(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0xb(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0xb(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0xc(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0xc(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0xd(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0xd(%r13,%rdx,1),%ecx
  add    %ecx,%eax
  lea    0xe(%rdx),%rcx
  cmp    %rcx,%rbx
  jbe    L103
  movsbl 0xe(%r13,%rdx,1),%edx
  add    %edx,%eax
  nopw   0x0(%rax,%rax,1)
L103:
  mov    -0x38(%rbp),%rdx
  sub    %fs:0x28,%rdx
  jne    L241
  lea    -0x28(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
  cs nopw 0x0(%rax,%rax,1)
L13:
  orq    $0x0,-0x8(%rsp,%rdx,1)
  jmp    L255
L201:
  xor    %eax,%eax
  jmp    L103
L5:
  xor    %edx,%edx
  xor    %eax,%eax
  jmp    L94
L241:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int f(unsigned long bytes) {
  char buf[bytes];
  for (unsigned long i = 0; i < bytes; i++)
    buf[i] = rand() % 256;
  int sum = 0;
  for (unsigned long i = 0; i < bytes; i++)
    sum += buf[i];
  return sum;
}
```