ylfeng/ReF-Decompile-dataset huggingface dataset:
user: What is the c source code of the assembly code below:

```asm
<strip_line>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x18,%rsp
  movzbl (%rdi),%ebx
  test   %bl,%bl
  je     L10
  mov    %rdi,%r15
  mov    $0x1,%r13d
  movabs $0x280000008c0003,%r12
  jmp    L19
  nopl   0x0(%rax,%rax,1)
L88:
  lea    -0x28(%rbx),%ecx
  mov    %r13,%rax
  shl    %cl,%rax
  test   %r12,%rax
  jne    L15
  movabs $0x10000000000010,%rsi
  test   %rsi,%rax
  jne    L63
  cmp    $0x2d,%bl
  je     L150
L94:
  movsbl %bl,%edi
  mov    %edi,0xc(%rsp)
  call   <islower@plt>
  test   %eax,%eax
  je     L107
  mov    0xc(%rsp),%edi
  call   <toupper@plt>
  mov    %eax,%ebx
L107:
  mov    %bl,(%r14)
  add    $0x1,%r14
  nopl   0x0(%rax)
L15:
  movzbl 0x1(%r15),%ebx
  lea    0x1(%r15),%rax
  test   %bl,%bl
  je     L10
L239:
  mov    %rax,%r15
L19:
  cmp    $0x5d,%bl
  jg     L94
  cmp    $0x27,%bl
  jg     L88
  cmp    $0x23,%bl
  jne    L76
  movzbl 0x1(%r15),%eax
  lea    0x1(%r15),%rdx
  test   %al,%al
  je     L225
  cmp    $0x23,%al
  je     L225
L45:
  movzbl 0x1(%rdx),%eax
  add    $0x1,%rdx
  cmp    $0x23,%al
  je     L225
  test   %al,%al
  jne    L45
L225:
  xor    %r15d,%r15d
  cmp    $0x23,%al
  sete   %r15b
  add    %rdx,%r15
  movzbl 0x1(%r15),%ebx
  lea    0x1(%r15),%rax
  test   %bl,%bl
  jne    L239
L10:
  movb   $0x0,(%r14)
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L76:
  jg     L94
  cmp    $0xa,%bl
  je     L15
  cmp    $0x21,%bl
  je     L15
  jmp    L94
  nopl   (%rax)
L150:
  movsbl 0x1(%r15),%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L191
  movb   $0x2d,(%r14)
  add    $0x1,%r14
  jmp    L15
  nopl   0x0(%rax,%rax,1)
L164:
  movsbl -0x1(%r14),%edi
  lea    -0x1(%r14),%rbx
  call   <isspace@plt>
  test   %eax,%eax
  jne    L126
  mov    %rbx,%r14
L191:
  cmp    %rbp,%r14
  jne    L164
  add    $0x1,%r14
  mov    %rbp,%rbx
L126:
  movb   $0x20,(%rbx)
  jmp    L15
  nopl   0x0(%rax)
L63:
  movb   $0x20,(%r14)
  add    $0x1,%r14
  jmp    L15
```

assistant: ```c
void strip_line(line) char *line;
{
  char *from, *to;
  for (from = to = line;; from++) {
    if (!(*from))
      break;
    switch (*from) {
    case '(':
    case ')':
    case '[':
    case ']':
    case ':':
    case ';':
    case '?':
    case '!':
    case '\n':
      break;
    case ',':
    case '\\':
      *to++ = ' ';
      break;
    case '#':
      for (++from; *from != '#' && *from; from++)
        ;
      if (*from == '#')
        from++;
      break;
    case '-':
      if (isspace((int)*(from + 1))) {
        while ((to != line) && !isspace((int)*(--to)))
          ;
        *to++ = ' ';
      } else {
        *to++ = *from;
      }
      break;
    default:
      *to++ = (islower((int)*from)) ? (char)toupper((int)*from) : *from;
    }
    if (!from)
      break;
  }
  *to = 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<strip_line>:
  endbr64
  push   %r15
  push   %r14
  mov    %rdi,%r14
  push   %r13
  push   %r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x18,%rsp
  movzbl (%rdi),%ebx
  test   %bl,%bl
  je     L127
  mov    %rdi,%r15
  mov    $0x1,%r13d
  movabs $0x280000008c0003,%r12
  jmp    L176
  nopl   0x0(%rax,%rax,1)
L24:
  lea    -0x28(%rbx),%ecx
  mov    %r13,%rax
  shl    %cl,%rax
  test   %r12,%rax
  jne    L65
  movabs $0x10000000000010,%rsi
  test   %rsi,%rax
  jne    L21
  cmp    $0x2d,%bl
  je     L210
L106:
  movsbl %bl,%edi
  mov    %edi,0xc(%rsp)
  call   <islower@plt>
  test   %eax,%eax
  je     L230
  mov    0xc(%rsp),%edi
  call   <toupper@plt>
  mov    %eax,%ebx
L230:
  mov    %bl,(%r14)
  add    $0x1,%r14
  nopl   0x0(%rax)
L65:
  movzbl 0x1(%r15),%ebx
  lea    0x1(%r15),%rax
  test   %bl,%bl
  je     L127
L123:
  mov    %rax,%r15
L176:
  cmp    $0x5d,%bl
  jg     L106
  cmp    $0x27,%bl
  jg     L24
  cmp    $0x23,%bl
  jne    L146
  movzbl 0x1(%r15),%eax
  lea    0x1(%r15),%rdx
  test   %al,%al
  je     L152
  cmp    $0x23,%al
  je     L152
L120:
  movzbl 0x1(%rdx),%eax
  add    $0x1,%rdx
  cmp    $0x23,%al
  je     L152
  test   %al,%al
  jne    L120
L152:
  xor    %r15d,%r15d
  cmp    $0x23,%al
  sete   %r15b
  add    %rdx,%r15
  movzbl 0x1(%r15),%ebx
  lea    0x1(%r15),%rax
  test   %bl,%bl
  jne    L123
L127:
  movb   $0x0,(%r14)
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax)
L146:
  jg     L106
  cmp    $0xa,%bl
  je     L65
  cmp    $0x21,%bl
  je     L65
  jmp    L106
  nopl   (%rax)
L210:
  movsbl 0x1(%r15),%edi
  call   <isspace@plt>
  test   %eax,%eax
  jne    L13
  movb   $0x2d,(%r14)
  add    $0x1,%r14
  jmp    L65
  nopl   0x0(%rax,%rax,1)
L86:
  movsbl -0x1(%r14),%edi
  lea    -0x1(%r14),%rbx
  call   <isspace@plt>
  test   %eax,%eax
  jne    L108
  mov    %rbx,%r14
L13:
  cmp    %rbp,%r14
  jne    L86
  add    $0x1,%r14
  mov    %rbp,%rbx
L108:
  movb   $0x20,(%rbx)
  jmp    L65
  nopl   0x0(%rax)
L21:
  movb   $0x20,(%r14)
  add    $0x1,%r14
  jmp    L65
```

assistant: ```c
void strip_line(line) char *line;
{
  char *from, *to;
  for (from = to = line;; from++) {
    if (!(*from))
      break;
    switch (*from) {
    case '(':
    case ')':
    case '[':
    case ']':
    case ':':
    case ';':
    case '?':
    case '!':
    case '\n':
      break;
    case ',':
    case '\\':
      *to++ = ' ';
      break;
    case '#':
      for (++from; *from != '#' && *from; from++)
        ;
      if (*from == '#')
        from++;
      break;
    case '-':
      if (isspace((int)*(from + 1))) {
        while ((to != line) && !isspace((int)*(--to)))
          ;
        *to++ = ' ';
      } else {
        *to++ = *from;
      }
      break;
    default:
      *to++ = (islower((int)*from)) ? (char)toupper((int)*from) : *from;
    }
    if (!from)
      break;
  }
  *to = 0;
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<mystrstr>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L60
  mov    -0x18(%rbp),%rax
  jmp    L15
L85:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L28
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  jmp    L19
L77:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L4
  addq   $0x1,-0x10(%rbp)
  addq   $0x1,-0x8(%rbp)
L19:
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L72
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L77
  jmp    L72
L4:
  nop
L72:
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L28
  mov    -0x18(%rbp),%rax
  jmp    L15
L28:
  addq   $0x1,-0x18(%rbp)
L60:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L85
  mov    $0x0,%eax
L15:
  pop    %rbp
  ret
```

assistant: ```c
const char *mystrstr(const char *s, const char *sub) {
  ;
  if (!*sub) {
    return s;
  }
  for (; *s; ++s) {
    if (*s == *sub) {
      const char *h, *n;
      for (h = s, n = sub; *h && *n; ++h, ++n) {
        if (*h != *n) {
          break;
        }
      }
      if (!*n) {
        return s;
      }
    }
  }
  return NULL;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<mystrstr>:
  endbr64
  movzbl (%rsi),%r9d
  mov    %rdi,%rax
  test   %r9b,%r9b
  je     L84
  movzbl (%rdi),%eax
  test   %al,%al
  jne    L10
  mov    $0x0,%eax
  ret
L52:
  cmpb   $0x0,(%rdx)
  je     L8
L15:
  add    $0x1,%rdi
  movzbl (%rdi),%eax
  test   %al,%al
  je     L45
L10:
  cmp    %al,%r9b
  jne    L15
  movzbl (%rdi),%eax
  mov    %rsi,%rdx
  mov    %rdi,%r8
  test   %al,%al
  je     L15
L62:
  movzbl (%rdx),%ecx
  cmp    %al,%cl
  jne    L52
  test   %cl,%cl
  je     L52
  add    $0x1,%r8
  add    $0x1,%rdx
  movzbl (%r8),%eax
  test   %al,%al
  jne    L62
  jmp    L52
L45:
  mov    $0x0,%eax
  ret
L8:
  mov    %rdi,%rax
L84:
  ret
```

assistant: ```c
const char *mystrstr(const char *s, const char *sub) {
  ;
  if (!*sub) {
    return s;
  }
  for (; *s; ++s) {
    if (*s == *sub) {
      const char *h, *n;
      for (h = s, n = sub; *h && *n; ++h, ++n) {
        if (*h != *n) {
          break;
        }
      }
      if (!*n) {
        return s;
      }
    }
  }
  return NULL;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<mystrstr>:
  endbr64
  movzbl (%rsi),%r8d
  mov    %rdi,%rax
  test   %r8b,%r8b
  jne    L33
  jmp    L32
  nopw   0x0(%rax,%rax,1)
L35:
  add    $0x1,%rdi
L33:
  movzbl (%rdi),%eax
  test   %al,%al
  je     L80
  cmp    %al,%r8b
  jne    L35
  movzbl (%rdi),%edx
  mov    %r8d,%ecx
  mov    $0x1,%eax
  test   %dl,%dl
  jne    L50
  jmp    L35
  nopl   0x0(%rax)
L2:
  test   %cl,%cl
  je     L53
  movzbl (%rdi,%rax,1),%edx
  add    $0x1,%rax
  movzbl -0x1(%rsi,%rax,1),%ecx
  test   %dl,%dl
  je     L71
L50:
  cmp    %cl,%dl
  je     L2
L71:
  test   %cl,%cl
  jne    L35
  nopl   (%rax)
L53:
  mov    %rdi,%rax
L32:
  ret
  nopl   0x0(%rax)
L80:
  xor    %eax,%eax
  ret
```

assistant: ```c
const char *mystrstr(const char *s, const char *sub) {
  ;
  if (!*sub) {
    return s;
  }
  for (; *s; ++s) {
    if (*s == *sub) {
      const char *h, *n;
      for (h = s, n = sub; *h && *n; ++h, ++n) {
        if (*h != *n) {
          break;
        }
      }
      if (!*n) {
        return s;
      }
    }
  }
  return NULL;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<mystrstr>:
  endbr64
  movzbl (%rsi),%r8d
  mov    %rdi,%rax
  test   %r8b,%r8b
  jne    L22
  jmp    L6
  nopw   0x0(%rax,%rax,1)
L99:
  add    $0x1,%rdi
L22:
  movzbl (%rdi),%eax
  test   %al,%al
  je     L94
  cmp    %al,%r8b
  jne    L99
  movzbl (%rdi),%edx
  mov    %r8d,%ecx
  mov    $0x1,%eax
  test   %dl,%dl
  jne    L89
  jmp    L99
  nopl   0x0(%rax)
L85:
  test   %cl,%cl
  je     L52
  movzbl (%rdi,%rax,1),%edx
  add    $0x1,%rax
  movzbl -0x1(%rsi,%rax,1),%ecx
  test   %dl,%dl
  je     L66
L89:
  cmp    %cl,%dl
  je     L85
L66:
  test   %cl,%cl
  jne    L99
  nopl   (%rax)
L52:
  mov    %rdi,%rax
L6:
  ret
  nopl   0x0(%rax)
L94:
  xor    %eax,%eax
  ret
```

assistant: ```c
const char *mystrstr(const char *s, const char *sub) {
  ;
  if (!*sub) {
    return s;
  }
  for (; *s; ++s) {
    if (*s == *sub) {
      const char *h, *n;
      for (h = s, n = sub; *h && *n; ++h, ++n) {
        if (*h != *n) {
          break;
        }
      }
      if (!*n) {
        return s;
      }
    }
  }
  return NULL;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<strtoul>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %edx,-0x44(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  movb   $0x0,-0x21(%rbp)
  jmp    L21
L47:
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x38(%rbp)
L21:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L111
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jle    L47
L111:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2d,%al
  jne    L116
  movb   $0x1,-0x21(%rbp)
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x38(%rbp)
  jmp    L116
L110:
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    %rax,-0x38(%rbp)
L116:
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L69
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jle    L110
L69:
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  lea    -0x22(%rbp),%rdx
  mov    -0x44(%rbp),%ecx
  lea    -0x38(%rbp),%rax
  mov    %ecx,%esi
  mov    %rax,%rdi
  call   <strtoul0@plt>
  mov    %rax,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  cmp    %rax,-0x10(%rbp)
  jne    L48
  mov    -0x18(%rbp),%rax
  mov    %rax,-0x38(%rbp)
L48:
  cmpq   $0x0,-0x40(%rbp)
  je     L65
  mov    -0x38(%rbp),%rdx
  mov    -0x40(%rbp),%rax
  mov    %rdx,(%rax)
L65:
  movzbl -0x22(%rbp),%eax
  test   %al,%al
  jne    L27
  cmpb   $0x0,-0x21(%rbp)
  je     L27
  negq   -0x20(%rbp)
L27:
  movzbl -0x22(%rbp),%eax
  test   %al,%al
  je     L66
  mov    D0(%rip),%rax
  movl   $0x22,(%rax)
L66:
  mov    -0x20(%rbp),%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L120
  call   <__stack_chk_fail@plt>
L120:
  leave
  ret
```

assistant: ```c
unsigned long strtoul(const char *s, const char **endp, int base) {
  const char *s0 = s, *s1;
  char sign = 0, errflag;
  unsigned long val;
  while (*s != '\0' && *s <= ' ')
    s++;
  if (*s == '-') {
    sign = 1;
    s++;
  }
  while (*s != '\0' && *s <= ' ')
    s++;
  s1 = s;
  val = strtoul0(&s, base, &errflag);
  if (s == s1)
    s = s0;
  if (endp)
    *endp = s;
  if (errflag == 0 && sign != 0)
    val = -val;
  if (errflag)
    errno = 34;
  return val;
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<strtoul>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbx
  mov    %rdi,0x8(%rsp)
  mov    %rsi,%rbp
  mov    %edx,%esi
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  movzbl (%rdi),%edi
  test   %dil,%dil
  je     L119
  cmp    $0x20,%dil
  jg     L119
  lea    0x1(%rbx),%rcx
L144:
  mov    %rcx,%rax
  mov    %rcx,0x8(%rsp)
  movzbl (%rcx),%edi
  add    $0x1,%rcx
  test   %dil,%dil
  je     L142
  cmp    $0x20,%dil
  jle    L144
L142:
  cmp    $0x2d,%dil
  jne    L39
  lea    0x1(%rax),%r12
  mov    %r12,0x8(%rsp)
  movzbl 0x1(%rax),%edx
  test   %dl,%dl
  je     L50
  cmp    $0x20,%dl
  jg     L50
  add    $0x2,%rax
L1:
  mov    %rax,%r12
  mov    %rax,0x8(%rsp)
  movzbl (%rax),%ecx
  add    $0x1,%rax
  test   %cl,%cl
  je     L147
  cmp    $0x20,%cl
  jle    L1
L147:
  mov    $0x1,%r13d
L143:
  lea    0x17(%rsp),%rdx
  lea    0x8(%rsp),%rdi
  call   <strtoul0@plt>
  cmp    %r12,0x8(%rsp)
  je     L127
L186:
  test   %rbp,%rbp
  je     L111
  mov    0x8(%rsp),%rdx
  mov    %rdx,0x0(%rbp)
L111:
  movzbl 0x17(%rsp),%edx
  test   %r13b,%r13b
  je     L132
  test   %dl,%dl
  je     L36
L132:
  test   %dl,%dl
  je     L135
  mov    D4(%rip),%rdx
  movl   $0x22,(%rdx)
L135:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L3
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L50:
  mov    $0x1,%r13d
  jmp    L143
L127:
  mov    %rbx,0x8(%rsp)
  jmp    L186
L36:
  neg    %rax
  jmp    L135
L39:
  mov    0x8(%rsp),%r12
  mov    $0x0,%r13d
  jmp    L143
L119:
  mov    %rbx,%rax
  jmp    L142
L3:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
unsigned long strtoul(const char *s, const char **endp, int base) {
  const char *s0 = s, *s1;
  char sign = 0, errflag;
  unsigned long val;
  while (*s != '\0' && *s <= ' ')
    s++;
  if (*s == '-') {
    sign = 1;
    s++;
  }
  while (*s != '\0' && *s <= ' ')
    s++;
  s1 = s;
  val = strtoul0(&s, base, &errflag);
  if (s == s1)
    s = s0;
  if (endp)
    *endp = s;
  if (errflag == 0 && sign != 0)
    val = -val;
  if (errflag)
    errno = 34;
  return val;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<strtoul>:
  endbr64
  push   %r13
  push   %r12
  mov    %rsi,%r12
  mov    %edx,%esi
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,0x8(%rsp)
  movzbl (%rdi),%edi
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    $0x20,%dil
  jg     L41
  test   %dil,%dil
  je     L41
  lea    0x1(%rbp),%rcx
  nopl   (%rax)
L3:
  mov    %rcx,0x8(%rsp)
  movzbl (%rcx),%edi
  mov    %rcx,%rax
  add    $0x1,%rcx
  test   %dil,%dil
  je     L63
  cmp    $0x20,%dil
  jle    L3
L63:
  cmp    $0x2d,%dil
  jne    L108
  lea    0x1(%rax),%rbx
  mov    %rbx,0x8(%rsp)
  movzbl 0x1(%rax),%edx
  test   %dl,%dl
  je     L168
  cmp    $0x20,%dl
  jg     L168
  add    $0x2,%rax
  cs nopw 0x0(%rax,%rax,1)
L166:
  mov    %rax,0x8(%rsp)
  movzbl (%rax),%ecx
  mov    %rax,%rbx
  add    $0x1,%rax
  test   %cl,%cl
  je     L168
  cmp    $0x20,%cl
  jle    L166
L168:
  mov    $0x1,%r13d
L37:
  lea    0x17(%rsp),%rdx
  lea    0x8(%rsp),%rdi
  call   <strtoul0@plt>
  cmp    %rbx,0x8(%rsp)
  je     L124
L141:
  test   %r12,%r12
  je     L15
  mov    0x8(%rsp),%rdx
  mov    %rdx,(%r12)
L15:
  cmpb   $0x0,0x17(%rsp)
  jne    L149
  mov    %rax,%rdx
  neg    %rdx
  test   %r13b,%r13b
  cmovne %rdx,%rax
L114:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L76
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L149:
  mov    D0(%rip),%rdx
  movl   $0x22,(%rdx)
  jmp    L114
  nopw   0x0(%rax,%rax,1)
L124:
  mov    %rbp,0x8(%rsp)
  jmp    L141
  nopw   0x0(%rax,%rax,1)
L108:
  mov    0x8(%rsp),%rbx
  xor    %r13d,%r13d
  jmp    L37
  nopl   (%rax)
L41:
  mov    %rbp,%rax
  jmp    L63
L76:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
unsigned long strtoul(const char *s, const char **endp, int base) {
  const char *s0 = s, *s1;
  char sign = 0, errflag;
  unsigned long val;
  while (*s != '\0' && *s <= ' ')
    s++;
  if (*s == '-') {
    sign = 1;
    s++;
  }
  while (*s != '\0' && *s <= ' ')
    s++;
  s1 = s;
  val = strtoul0(&s, base, &errflag);
  if (s == s1)
    s = s0;
  if (endp)
    *endp = s;
  if (errflag == 0 && sign != 0)
    val = -val;
  if (errflag)
    errno = 34;
  return val;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<strtoul>:
  endbr64
  push   %r13
  push   %r12
  mov    %rsi,%r12
  mov    %edx,%esi
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,0x8(%rsp)
  movzbl (%rdi),%ecx
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  cmp    $0x20,%cl
  jg     L123
  test   %cl,%cl
  je     L123
  lea    0x1(%rdi),%rax
  nopl   0x0(%rax,%rax,1)
L131:
  mov    %rax,0x8(%rsp)
  movzbl (%rax),%ecx
  mov    %rax,%rbx
  add    $0x1,%rax
  test   %cl,%cl
  je     L18
  cmp    $0x20,%cl
  jle    L131
L18:
  xor    %r13d,%r13d
  cmp    $0x2d,%cl
  jne    L102
  lea    0x1(%rbx),%rdx
  mov    %rdx,0x8(%rsp)
  movzbl 0x1(%rbx),%eax
  test   %al,%al
  je     L147
  cmp    $0x20,%al
  jg     L147
  lea    0x2(%rbx),%rax
  nopl   0x0(%rax)
L76:
  mov    %rax,0x8(%rsp)
  movzbl (%rax),%ecx
  mov    %rax,%rbx
  add    $0x1,%rax
  test   %cl,%cl
  je     L41
  cmp    $0x20,%cl
  jle    L76
L41:
  mov    $0x1,%r13d
L102:
  lea    0x17(%rsp),%rdx
  lea    0x8(%rsp),%rdi
  call   <strtoul0@plt>
  mov    0x8(%rsp),%rdx
  cmp    %rbx,%rdx
  cmove  %rbp,%rdx
  test   %r12,%r12
  je     L94
  mov    %rdx,(%r12)
L94:
  cmpb   $0x0,0x17(%rsp)
  jne    L141
  mov    %rax,%rdx
  neg    %rdx
  test   %r13b,%r13b
  cmovne %rdx,%rax
L115:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L111
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L141:
  mov    D4(%rip),%rdx
  movl   $0x22,(%rdx)
  jmp    L115
  nopw   0x0(%rax,%rax,1)
L123:
  mov    %rbp,%rbx
  jmp    L18
L147:
  mov    %rdx,%rbx
  jmp    L41
L111:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
unsigned long strtoul(const char *s, const char **endp, int base) {
  const char *s0 = s, *s1;
  char sign = 0, errflag;
  unsigned long val;
  while (*s != '\0' && *s <= ' ')
    s++;
  if (*s == '-') {
    sign = 1;
    s++;
  }
  while (*s != '\0' && *s <= ' ')
    s++;
  s1 = s;
  val = strtoul0(&s, base, &errflag);
  if (s == s1)
    s = s0;
  if (endp)
    *endp = s;
  if (errflag == 0 && sign != 0)
    val = -val;
  if (errflag)
    errno = 34;
  return val;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<any>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0x8(%rbp)
  jmp    L50
L20:
  movl   $0x0,-0x4(%rbp)
  jmp    L30
L43:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%edx
  mov    -0x4(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x20(%rbp),%rax
  add    %rcx,%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  jne    L25
  mov    -0x8(%rbp),%eax
  jmp    L27
L25:
  addl   $0x1,-0x4(%rbp)
L30:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L43
  addl   $0x1,-0x8(%rbp)
L50:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L20
  mov    $0xffffffff,%eax
L27:
  pop    %rbp
  ret
```

assistant: ```c
int any(char s1[], char s2[]) {
  int i, j;
  for (i = 0; s1[i]; i++)
    for (j = 0; s2[j]; j++)
      if (s1[i] == s2[j])
        return i;
  return -1;
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<any>:
  endbr64
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L47
  movzbl (%rsi),%r9d
  mov    $0x0,%r8d
L16:
  mov    %r8d,%r10d
  lea    0x1(%rsi),%rdx
  mov    %r9d,%eax
  test   %r9b,%r9b
  je     L7
L44:
  cmp    %cl,%al
  je     L17
  add    $0x1,%rdx
  movzbl -0x1(%rdx),%eax
  test   %al,%al
  jne    L44
L7:
  add    $0x1,%r8
  movzbl (%rdi,%r8,1),%ecx
  test   %cl,%cl
  jne    L16
  mov    $0xffffffff,%r10d
  jmp    L17
L47:
  mov    $0xffffffff,%r10d
L17:
  mov    %r10d,%eax
  ret
```

assistant: ```c
int any(char s1[], char s2[]) {
  int i, j;
  for (i = 0; s1[i]; i++)
    for (j = 0; s2[j]; j++)
      if (s1[i] == s2[j])
        return i;
  return -1;
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<any>:
  endbr64
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L9
  movzbl (%rsi),%r9d
  xor    %r8d,%r8d
L44:
  mov    %r8d,%r10d
  lea    0x1(%rsi),%rdx
  mov    %r9d,%eax
  test   %r9b,%r9b
  jne    L30
  jmp    L53
  nopl   0x0(%rax,%rax,1)
L25:
  movzbl (%rdx),%eax
  add    $0x1,%rdx
  test   %al,%al
  je     L53
L30:
  cmp    %cl,%al
  jne    L25
  mov    %r10d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L53:
  add    $0x1,%r8
  movzbl (%rdi,%r8,1),%ecx
  test   %cl,%cl
  jne    L44
L9:
  mov    $0xffffffff,%r10d
  mov    %r10d,%eax
  ret
```

assistant: ```c
int any(char s1[], char s2[]) {
  int i, j;
  for (i = 0; s1[i]; i++)
    for (j = 0; s2[j]; j++)
      if (s1[i] == s2[j])
        return i;
  return -1;
}
```
user: 这段汇编代码用C语言表示是什么样的？

```asm
<any>:
  endbr64
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L17
  movzbl (%rsi),%r9d
  xor    %r8d,%r8d
L31:
  mov    %r8d,%r10d
  lea    0x1(%rsi),%rdx
  mov    %r9d,%eax
  test   %r9b,%r9b
  jne    L30
  jmp    L19
  nopl   0x0(%rax,%rax,1)
L2:
  movzbl (%rdx),%eax
  add    $0x1,%rdx
  test   %al,%al
  je     L19
L30:
  cmp    %cl,%al
  jne    L2
  mov    %r10d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L19:
  add    $0x1,%r8
  movzbl (%rdi,%r8,1),%ecx
  test   %cl,%cl
  jne    L31
L17:
  mov    $0xffffffff,%r10d
  mov    %r10d,%eax
  ret
```

assistant: ```c
int any(char s1[], char s2[]) {
  int i, j;
  for (i = 0; s1[i]; i++)
    for (j = 0; s2[j]; j++)
      if (s1[i] == s2[j])
        return i;
  return -1;
}
```