user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<fsm_simple_replace>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  sub    $0x20,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    $0x0,%eax
  call   <fsm_identity@plt>
  mov    %eax,%edi
  call   <fsm_kleene_plus@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,-0x30(%rbp)
  mov    $0x0,%eax
  call   <fsm_universal@plt>
  mov    %rax,%rbx
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %eax,%r12d
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %r12d,%esi
  mov    %eax,%edi
  call   <fsm_intersect@plt>
  mov    %rax,%r12
  mov    $0x0,%eax
  call   <fsm_universal@plt>
  mov    %r12,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %rbx,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%rdi
  call   <fsm_complement@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%rbx
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %eax,%r12d
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %r12d,%esi
  mov    %eax,%edi
  call   <fsm_cross_product@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%r12
  mov    $0x0,%eax
  call   <fsm_universal@plt>
  mov    %rax,%r13
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %eax,%r14d
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_copy@plt>
  mov    %r14d,%esi
  mov    %eax,%edi
  call   <fsm_intersect@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%r14
  mov    $0x0,%eax
  call   <fsm_universal@plt>
  mov    %r14,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %r13,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%rdi
  call   <fsm_complement@plt>
  mov    %r12,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rax,%rdi
  call   <fsm_kleene_star@plt>
  mov    %rax,%rdi
  call   <fsm_minimize@plt>
  mov    %rbx,%rsi
  mov    %rax,%rdi
  call   <fsm_concat@plt>
  mov    %rax,-0x28(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_destroy@plt>
  mov    -0x40(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_destroy@plt>
  mov    -0x30(%rbp),%rax
  mov    %rax,%rdi
  call   <fsm_destroy@plt>
  mov    -0x28(%rbp),%rax
  add    $0x20,%rsp
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %rbp
  ret
```

assistant: ```c
struct fsm *fsm_simple_replace(struct fsm *net1, struct fsm *net2) {
  struct fsm *UPlus, *ret;
  UPlus = fsm_minimize(fsm_kleene_plus(fsm_identity()));
  ret = fsm_concat(fsm_minimize(fsm_kleene_star(fsm_minimize(fsm_concat(fsm_complement(fsm_minimize(fsm_concat(fsm_concat(fsm_universal(), fsm_minimize(fsm_intersect(fsm_copy(net1), fsm_copy(UPlus)))), fsm_universal()))), fsm_minimize(fsm_cross_product(fsm_copy(net1), fsm_copy(net2))))))), fsm_minimize(fsm_complement(fsm_minimize(fsm_concat(fsm_concat(fsm_universal(), fsm_intersect(fsm_copy(net1), fsm_copy(UPlus))), fsm_universal())))));
  fsm_destroy(net1);
  fsm_destroy(net2);
  fsm_destroy(UPlus);
  return (ret);
}
```