user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<addNum>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %edi,%ebp
  push   %rbx
  sub    $0x78,%rsp
  cmp    $0x9,%edi
  jbe    L62
  mov    %edi,%eax
  mov    $0xcccccccd,%ecx
  mov    %rax,0x58(%rsp)
  imul   %rcx,%rax
  shr    $0x23,%rax
  mov    %rax,0x18(%rsp)
  cmp    $0x63,%edi
  jbe    L88
  mov    0x18(%rsp),%eax
  mov    %rax,0x38(%rsp)
  imul   %rcx,%rax
  shr    $0x23,%rax
  mov    %rax,0x28(%rsp)
  cmp    $0x3e7,%edi
  jbe    L0
  mov    0x28(%rsp),%eax
  mov    %rax,0x48(%rsp)
  imul   %rcx,%rax
  shr    $0x23,%rax
  mov    %rax,0x20(%rsp)
  cmp    $0x270f,%edi
  jbe    L41
  mov    0x20(%rsp),%eax
  mov    %rax,0x40(%rsp)
  imul   %rcx,%rax
  mov    %rax,%r13
  shr    $0x23,%r13
  cmp    $0x1869f,%edi
  jbe    L17
  mov    %r13d,%r15d
  mov    %r15,%rbx
  imul   %rcx,%rbx
  shr    $0x23,%rbx
  cmp    $0xf423f,%edi
  jbe    L74
  mov    %ebx,%eax
  mov    %rax,%r14
  mov    %rax,0x30(%rsp)
  imul   %rcx,%r14
  shr    $0x23,%r14
  mov    %r14,0x10(%rsp)
  cmp    $0x98967f,%edi
  jbe    L50
  mov    0x10(%rsp),%eax
  mov    %rax,0x50(%rsp)
  imul   %rcx,%rax
  mov    %rax,%rdx
  shr    $0x23,%rdx
  mov    %rdx,%r14
  cmp    $0x5f5e0ff,%edi
  jbe    L5
  mov    %edx,%r8d
  mov    %r8,%rax
  imul   %rcx,%rax
  shr    $0x23,%rax
  cmp    $0x3b9ac9ff,%edi
  jbe    L37
  mov    %eax,%esi
  mov    %r8,0x68(%rsp)
  imul   %rsi,%rcx
  mov    %r12,%rsi
  mov    %eax,0x64(%rsp)
  shr    $0x23,%rcx
  mov    %ecx,%edi
  mov    %ecx,0x8(%rsp)
  call   <addNum>
  mov    0x8(%rsp),%ecx
  mov    0x64(%rsp),%eax
  mov    0x68(%rsp),%r8
  lea    (%rcx,%rcx,4),%ecx
  add    %ecx,%ecx
  sub    %ecx,%eax
L37:
  add    $0x30,%eax
  mov    %r12,%rsi
  mov    %r8,0x8(%rsp)
  movzbl %al,%edi
  call   <addChar@plt>
  mov    0x8(%rsp),%r8
  mov    $0xcccccccd,%eax
  imul   %r8,%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,%r14d
L5:
  lea    0x30(%r14),%edx
  mov    %r12,%rsi
  movzbl %dl,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x50(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,0x10(%rsp)
L50:
  movzbl 0x10(%rsp),%edi
  mov    %r12,%rsi
  add    $0x30,%edi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x30(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,%ebx
L74:
  lea    0x30(%rbx),%edi
  mov    %r12,%rsi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   %r15,%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,%r13d
L17:
  lea    0x30(%r13),%edi
  mov    %r12,%rsi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x40(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,0x20(%rsp)
L41:
  movzbl 0x20(%rsp),%edi
  mov    %r12,%rsi
  add    $0x30,%edi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x48(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,0x28(%rsp)
L0:
  movzbl 0x28(%rsp),%edi
  mov    %r12,%rsi
  add    $0x30,%edi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x38(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,0x18(%rsp)
L88:
  movzbl 0x18(%rsp),%edi
  mov    %r12,%rsi
  add    $0x30,%edi
  movzbl %dil,%edi
  call   <addChar@plt>
  mov    $0xcccccccd,%eax
  imul   0x58(%rsp),%rax
  shr    $0x23,%rax
  lea    (%rax,%rax,4),%eax
  add    %eax,%eax
  sub    %eax,%ebp
L62:
  add    $0x78,%rsp
  lea    0x30(%rbp),%edi
  mov    %r12,%rsi
  pop    %rbx
  movzbl %dil,%edi
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  jmp    1050 <addChar@plt>
```

assistant: ```c
void addNum(unsigned int n, unsigned int *i) {
  if (n < 10) {
    addChar(((char)((n % 10) + ((unsigned int)('0')))), i);
  } else {
    addNum(n / 10, i);
    addNum(n % 10, i);
  }
}
```