user: 请将以下的汇编代码转换成C语言代码:

```asm
<padding>:
  endbr64
  push   %r13
  mov    $0x10,%eax
  mov    %rdi,%r13
  push   %r12
  push   %rbp
  mov    %rdx,%rbp
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x8,%rsp
  test   %ecx,%ecx
  cmovle %eax,%ecx
  mov    %rsi,%rax
  cqto
  movslq %ecx,%r12
  idiv   %r12
  lea    0x1(%rax),%rdi
  imul   %r12,%rdi
  mov    %rdi,0x0(%rbp)
  call   <malloc@plt>
  mov    %rax,%r8
  test   %rbx,%rbx
  jle    L96
  lea    0x1(%r13),%rsi
  mov    %r8,%rdx
  lea    -0x1(%rbx),%rax
  mov    %rbx,%rcx
  sub    %rsi,%rdx
  cmp    $0xe,%rdx
  jbe    L171
  cmp    $0x6,%rax
  jbe    L171
  cmp    $0xe,%rax
  jbe    L75
  mov    %rbx,%rdx
  mov    %r13,%rcx
  mov    %r8,%rax
  and    $0xfffffffffffffff0,%rdx
  sub    %r8,%rcx
  add    %r8,%rdx
  nopl   0x0(%rax,%rax,1)
L111:
  movdqu (%rax,%rcx,1),%xmm0
  add    $0x10,%rax
  movups %xmm0,-0x10(%rax)
  cmp    %rdx,%rax
  jne    L111
  mov    %rbx,%rdx
  and    $0xfffffffffffffff0,%rdx
  mov    %rdx,%rax
  cmp    %rdx,%rbx
  je     L141
  mov    %rbx,%rcx
  sub    %rdx,%rcx
  lea    -0x1(%rcx),%rsi
  cmp    $0x6,%rsi
  jbe    L149
L78:
  mov    0x0(%r13,%rdx,1),%rsi
  mov    %rsi,(%r8,%rdx,1)
  mov    %rcx,%rdx
  and    $0xfffffffffffffff8,%rdx
  add    %rdx,%rax
  cmp    %rdx,%rcx
  je     L141
L149:
  movzbl 0x0(%r13,%rax,1),%edx
  mov    %dl,(%r8,%rax,1)
  lea    0x1(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x1(%r13,%rax,1),%edx
  mov    %dl,0x1(%r8,%rax,1)
  lea    0x2(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x2(%r13,%rax,1),%edx
  mov    %dl,0x2(%r8,%rax,1)
  lea    0x3(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x3(%r13,%rax,1),%edx
  mov    %dl,0x3(%r8,%rax,1)
  lea    0x4(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x4(%r13,%rax,1),%edx
  mov    %dl,0x4(%r8,%rax,1)
  lea    0x5(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x5(%r13,%rax,1),%edx
  mov    %dl,0x5(%r8,%rax,1)
  lea    0x6(%rax),%rdx
  cmp    %rdx,%rbx
  jle    L141
  movzbl 0x6(%r13,%rax,1),%edx
  mov    %dl,0x6(%r8,%rax,1)
L141:
  mov    0x0(%rbp),%rcx
  mov    %rcx,%rax
  sub    %rbx,%rax
  cqto
  idiv   %r12
  cmp    %rbx,%rcx
  jle    L85
  nopw   0x0(%rax,%rax,1)
L10:
  mov    %rbx,%rax
  add    $0x1,%rbx
  mov    %dl,(%rax,%r8,1)
  cmp    %rbx,0x0(%rbp)
  jg     L10
L85:
  add    $0x8,%rsp
  mov    %r8,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nop
L171:
  lea    (%rbx,%r8,1),%rcx
  mov    %r8,%rax
  sub    %r8,%r13
  nopw   0x0(%rax,%rax,1)
L86:
  movzbl 0x0(%r13,%rax,1),%edx
  add    $0x1,%rax
  mov    %dl,-0x1(%rax)
  cmp    %rcx,%rax
  jne    L86
  jmp    L141
  nopl   0x0(%rax)
L96:
  xor    %ebx,%ebx
  jmp    L141
L75:
  xor    %edx,%edx
  xor    %eax,%eax
  jmp    L78
```

assistant: ```c
unsigned char *padding(const unsigned char *in, long size, long *p_size, int padding) {
  char p_value = 0;
  long index = 0;
  unsigned char *out = NULL;
  if (padding <= 0) {
    padding = 16;
  }
  *p_size = (size / padding + 1) * padding;
  out = (unsigned char *)malloc(*p_size);
  while (index < size) {
    out[index] = in[index];
    index++;
  }
  p_value = (*p_size - index) % padding;
  while (index < *p_size) {
    out[index++] = p_value;
  }
  return out;
}
```