user: 请从给定的汇编指令推导出C源代码：

```asm
<rpio_get_rpi_revision>:
  endbr64
  push   %rbp
  sub    $0x410,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x408(%rsp)
  xor    %eax,%eax
  mov    %rsp,%rbp
  mov    %rbp,%rdi
  call   <get_cpuinfo_revision@plt>
  test   %eax,%eax
  je     L150
  mov    %rbp,%rdi
  call   <strlen@plt>
  cmp    $0x4,%eax
  jg     L166
L106:
  lea    D35(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L90
L48:
  mov    $0x1,%eax
L20:
  mov    0x408(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L137
  add    $0x410,%rsp
  pop    %rbp
  ret
  nopl   0x0(%rax,%rax,1)
L166:
  cltq
  lea    -0x4(%rbp,%rax,1),%rbp
  jmp    L106
  nopl   0x0(%rax)
L90:
  lea    D12(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L48
  lea    D41(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D43(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D54(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D30(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D110(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D6(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D102(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D63(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D99(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  je     L156
  lea    D68(%rip),%rsi
  mov    %rbp,%rdi
  call   <strcmp@plt>
  neg    %rax
  sbb    %eax,%eax
  and    $0x3,%eax
  jmp    L20
  nopl   0x0(%rax)
L156:
  mov    $0x2,%eax
  jmp    L20
  nopw   0x0(%rax,%rax,1)
L150:
  mov    $0xffffffff,%eax
  jmp    L20
L137:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: disassemble_data
arguments: data_label: D35
datatype: string
name: disassemble_data
arguments: data_label: D12
datatype: string
name: disassemble_data
arguments: data_label: D41
datatype: string
name: disassemble_data
arguments: data_label: D43
datatype: string
name: disassemble_data
arguments: data_label: D54
datatype: string
name: disassemble_data
arguments: data_label: D30
datatype: string
name: disassemble_data
arguments: data_label: D110
datatype: string
name: disassemble_data
arguments: data_label: D6
datatype: string
name: disassemble_data
arguments: data_label: D102
datatype: string
name: disassemble_data
arguments: data_label: D63
datatype: string
name: disassemble_data
arguments: data_label: D99
datatype: string
name: disassemble_data
arguments: data_label: D68
datatype: string

tool: D35: 0002

tool: D12: 0003

tool: D41: 0004

tool: D43: 0005

tool: D54: 0006

tool: D30: 0007

tool: D110: 0008

tool: D6: 0009

tool: D102: 000d

tool: D63: 000e

tool: D99: 000f

tool: D68: 0011

assistant: ```c
int rpio_get_rpi_revision(void) {
  char raw_revision[1024];
  int len;
  char *revision;
  if (!get_cpuinfo_revision(raw_revision))
    return -1;
  len = strlen(raw_revision);
  if (len > 4)
    revision = ((char *)raw_revision) + len - 4;
  else
    revision = raw_revision;
  if ((strcmp(revision, "0002") == 0) || (strcmp(revision, "0003") == 0))
    return 1;
  else if ((strcmp(revision, "0004") == 0) || (strcmp(revision, "0005") == 0) || (strcmp(revision, "0006") == 0) || (strcmp(revision, "0007") == 0) || (strcmp(revision, "0008") == 0) || (strcmp(revision, "0009") == 0) || (strcmp(revision, "000d") == 0) || (strcmp(revision, "000e") == 0) || (strcmp(revision, "000f") == 0))
    return 2;
  else if (strcmp(revision, "0011") == 0)
    return 0;
  else
    return 3;
}
```