ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,%r14d
  mov    %rsi,0x8(%rsp)
  mov    $0x0,%r15d
  cmp    $0x1,%edi
  jg     L17
L189:
  mov    $0x0,%ebx
  mov    $0x0,%r12d
  lea    -0x1(%r14),%eax
  mov    %eax,0x4(%rsp)
  jmp    L191
L17:
  mov    0x8(%rsi),%rdi
  call   <atoi@plt>
  mov    %eax,%r13d
  mov    $0x1,%r15d
  jmp    L189
L163:
  test   %ebx,%ebx
  jle    L91
L31:
  mov    $0x20,%edi
  call   <putchar@plt>
  sub    $0x1,%ebx
  jne    L31
L91:
  cmp    $0xa,%ebp
  je     L70
L107:
  mov    %ebp,%edi
  call   <putchar@plt>
L191:
  mov    $0x0,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  mov    D0(%rip),%rax
  cmp    %ebp,(%rax)
  je     L123
  add    $0x1,%r12d
  cmp    $0x20,%ebp
  jne    L163
  add    $0x1,%ebx
  cmp    $0x1,%r14d
  jle    L202
  cmp    %r12d,%r13d
  je     L77
  jge    L191
  cmp    %r15d,0x4(%rsp)
  jle    L191
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    0x8(%rsp),%rcx
  mov    (%rcx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,%r13d
  jmp    L191
L77:
  mov    %r12d,%r13d
  cmp    %r15d,0x4(%rsp)
  jg     L106
L40:
  cmp    $0x1,%ebx
  jle    L191
  mov    $0x9,%edi
  call   <putchar@plt>
  mov    $0x0,%ebx
  jmp    L191
L106:
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    0x8(%rsp),%rdx
  mov    (%rdx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,%r13d
  jmp    L40
L202:
  test   $0x7,%r12b
  jne    L191
  cmp    $0x1,%ebx
  jle    L191
  mov    $0x9,%edi
  call   <putchar@plt>
  mov    $0x0,%ebx
  jmp    L191
L70:
  mov    $0x0,%ebx
  mov    $0x0,%r12d
  test   %r15d,%r15d
  jle    L107
  mov    0x8(%rsp),%rax
  mov    0x8(%rax),%rdi
  call   <atoi@plt>
  mov    %eax,%r13d
  mov    $0x1,%r15d
  jmp    L107
L123:
  mov    $0x0,%eax
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
int main(int argc, char *argv[]) {
  int column, c, spaces, tabnum, stop;
  spaces = column = 0;
  if (argc > 1) {
    tabnum = 1;
    stop = atoi(argv[tabnum]);
  } else {
    tabnum = 0;
  }
  while ((c = getchar()) != EOF) {
    column++;
    if (c == ' ') {
      spaces++;
      if (argc > 1) {
        if (column == stop) {
          if (tabnum < (argc - 1)) {
            stop = atoi(argv[++tabnum]);
          }
          if (spaces > 1) {
            putchar('\t');
            spaces = 0;
          }
        } else if (column > stop && tabnum < (argc - 1)) {
          stop = atoi(argv[++tabnum]);
        }
      } else {
        if (column % 8 == 0 && spaces > 1) {
          putchar('\t');
          spaces = 0;
        }
      }
    } else {
      while (spaces > 0) {
        putchar(' ');
        spaces--;
      }
      if (c == '\n') {
        column = 0;
        spaces = 0;
        if (tabnum > 0) {
          tabnum = 1;
          stop = atoi(argv[tabnum]);
        }
      }
      putchar(c);
    }
  }
  return 0;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  push   %r15
  xor    %r15d,%r15d
  push   %r14
  mov    %edi,%r14d
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,0x8(%rsp)
  cmp    $0x1,%edi
  jle    L61
  mov    0x8(%rsi),%rdi
  mov    $0x1,%r15d
  call   <atoi@plt>
  mov    %eax,(%rsp)
L61:
  lea    -0x1(%r14),%eax
  mov    D1(%rip),%r13
  xor    %ebx,%ebx
  xor    %r12d,%r12d
  mov    %eax,0x4(%rsp)
  nopl   0x0(%rax,%rax,1)
L99:
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  cmp    %eax,0x0(%r13)
  je     L2
L79:
  add    $0x1,%r12d
  cmp    $0x20,%ebp
  jne    L9
  add    $0x1,%ebx
  cmp    $0x1,%r14d
  jle    L47
  cmp    %r12d,(%rsp)
  je     L119
  jge    L99
  cmp    %r15d,0x4(%rsp)
  jle    L99
  mov    0x8(%rsp),%rcx
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    (%rcx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L99
  xchg   %ax,%ax
L9:
  test   %ebx,%ebx
  je     L86
  nopl   0x0(%rax)
L130:
  mov    $0x20,%edi
  call   <putchar@plt>
  sub    $0x1,%ebx
  jne    L130
L86:
  cmp    $0xa,%ebp
  je     L66
L127:
  mov    %ebp,%edi
  xor    %ebx,%ebx
  call   <putchar@plt>
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  cmp    %eax,0x0(%r13)
  jne    L79
L2:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L47:
  test   $0x7,%r12b
  jne    L99
L50:
  cmp    $0x1,%ebx
  je     L99
  mov    $0x9,%edi
  xor    %ebx,%ebx
  call   <putchar@plt>
  jmp    L99
  nopl   0x0(%rax)
L66:
  xor    %r12d,%r12d
  test   %r15d,%r15d
  je     L127
  mov    0x8(%rsp),%rax
  mov    $0x1,%r15d
  mov    0x8(%rax),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L127
  nopl   0x0(%rax)
L119:
  cmp    %r15d,0x4(%rsp)
  jle    L50
  mov    0x8(%rsp),%rdx
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    (%rdx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L50
```

assistant: ```c
int main(int argc, char *argv[]) {
  int column, c, spaces, tabnum, stop;
  spaces = column = 0;
  if (argc > 1) {
    tabnum = 1;
    stop = atoi(argv[tabnum]);
  } else {
    tabnum = 0;
  }
  while ((c = getchar()) != EOF) {
    column++;
    if (c == ' ') {
      spaces++;
      if (argc > 1) {
        if (column == stop) {
          if (tabnum < (argc - 1)) {
            stop = atoi(argv[++tabnum]);
          }
          if (spaces > 1) {
            putchar('\t');
            spaces = 0;
          }
        } else if (column > stop && tabnum < (argc - 1)) {
          stop = atoi(argv[++tabnum]);
        }
      } else {
        if (column % 8 == 0 && spaces > 1) {
          putchar('\t');
          spaces = 0;
        }
      }
    } else {
      while (spaces > 0) {
        putchar(' ');
        spaces--;
      }
      if (c == '\n') {
        column = 0;
        spaces = 0;
        if (tabnum > 0) {
          tabnum = 1;
          stop = atoi(argv[tabnum]);
        }
      }
      putchar(c);
    }
  }
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %r15
  xor    %r15d,%r15d
  push   %r14
  mov    %edi,%r14d
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,0x8(%rsp)
  cmp    $0x1,%edi
  jle    L127
  mov    0x8(%rsi),%rdi
  mov    $0x1,%r15d
  call   <atoi@plt>
  mov    %eax,(%rsp)
L127:
  lea    -0x1(%r14),%eax
  mov    D4(%rip),%r13
  xor    %ebx,%ebx
  xor    %r12d,%r12d
  mov    %eax,0x4(%rsp)
  nopl   0x0(%rax,%rax,1)
L162:
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  cmp    %eax,0x0(%r13)
  je     L186
L51:
  add    $0x1,%r12d
  cmp    $0x20,%ebp
  jne    L67
  add    $0x1,%ebx
  cmp    $0x1,%r14d
  jle    L181
  cmp    %r12d,(%rsp)
  je     L173
  jge    L162
  cmp    %r15d,0x4(%rsp)
  jle    L162
  mov    0x8(%rsp),%rcx
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    (%rcx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L162
  xchg   %ax,%ax
L67:
  test   %ebx,%ebx
  je     L177
  nopl   0x0(%rax)
L110:
  mov    $0x20,%edi
  call   <putchar@plt>
  sub    $0x1,%ebx
  jne    L110
L177:
  cmp    $0xa,%ebp
  je     L91
L79:
  mov    %ebp,%edi
  xor    %ebx,%ebx
  call   <putchar@plt>
  xor    %eax,%eax
  call   <getchar@plt>
  mov    %eax,%ebp
  cmp    %eax,0x0(%r13)
  jne    L51
L186:
  add    $0x18,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L181:
  test   $0x7,%r12b
  jne    L162
L54:
  cmp    $0x1,%ebx
  je     L162
  mov    $0x9,%edi
  xor    %ebx,%ebx
  call   <putchar@plt>
  jmp    L162
  nopl   0x0(%rax)
L91:
  xor    %r12d,%r12d
  test   %r15d,%r15d
  je     L79
  mov    0x8(%rsp),%rax
  mov    $0x1,%r15d
  mov    0x8(%rax),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L79
  nopl   0x0(%rax)
L173:
  cmp    %r15d,0x4(%rsp)
  jle    L54
  mov    0x8(%rsp),%rdx
  add    $0x1,%r15d
  movslq %r15d,%rax
  mov    (%rdx,%rax,8),%rdi
  call   <atoi@plt>
  mov    %eax,(%rsp)
  jmp    L54
```

assistant: ```c
int main(int argc, char *argv[]) {
  int column, c, spaces, tabnum, stop;
  spaces = column = 0;
  if (argc > 1) {
    tabnum = 1;
    stop = atoi(argv[tabnum]);
  } else {
    tabnum = 0;
  }
  while ((c = getchar()) != EOF) {
    column++;
    if (c == ' ') {
      spaces++;
      if (argc > 1) {
        if (column == stop) {
          if (tabnum < (argc - 1)) {
            stop = atoi(argv[++tabnum]);
          }
          if (spaces > 1) {
            putchar('\t');
            spaces = 0;
          }
        } else if (column > stop && tabnum < (argc - 1)) {
          stop = atoi(argv[++tabnum]);
        }
      } else {
        if (column % 8 == 0 && spaces > 1) {
          putchar('\t');
          spaces = 0;
        }
      }
    } else {
      while (spaces > 0) {
        putchar(' ');
        spaces--;
      }
      if (c == '\n') {
        column = 0;
        spaces = 0;
        if (tabnum > 0) {
          tabnum = 1;
          stop = atoi(argv[tabnum]);
        }
      }
      putchar(c);
    }
  }
  return 0;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<olsame_>:
  endbr64
  movzbl (%rdi),%edx
  movzbl (%rsi),%eax
  mov    $0x1,%ecx
  cmp    %al,%dl
  je     L3
  movzbl %dl,%edx
  movzbl %al,%esi
  lea    -0x61(%rdx),%edi
  lea    -0x20(%rdx),%ecx
  cmp    $0x1a,%edi
  cmovae %edx,%ecx
  mov    %ecx,D3(%rip)
  mov    %esi,%eax
  sub    $0x61,%eax
  lea    -0x20(%rsi),%edx
  cmp    $0x1a,%eax
  mov    %esi,%eax
  cmovb  %edx,%eax
  mov    %eax,D17(%rip)
  cmp    %eax,%ecx
  sete   %cl
  movzbl %cl,%ecx
L3:
  mov    %ecx,%eax
  ret
```

assistant: ```c
int olsame_(char *ca, char *cb) {
  int ret_val;
  static int inta, intb, zcode;
  ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
  if (ret_val) {
    return ret_val;
  }
  zcode = 'Z';
  inta = *(unsigned char *)ca;
  intb = *(unsigned char *)cb;
  if (zcode == 90 || zcode == 122) {
    if (inta >= 97 && inta <= 122) {
      inta += -32;
    }
    if (intb >= 97 && intb <= 122) {
      intb += -32;
    }
  } else if (zcode == 233 || zcode == 169) {
    if (inta >= 129 && inta <= 137 || inta >= 145 && inta <= 153 || inta >= 162 && inta <= 169) {
      inta += 64;
    }
    if (intb >= 129 && intb <= 137 || intb >= 145 && intb <= 153 || intb >= 162 && intb <= 169) {
      intb += 64;
    }
  } else if (zcode == 218 || zcode == 250) {
    if (inta >= 225 && inta <= 250) {
      inta += -32;
    }
    if (intb >= 225 && intb <= 250) {
      intb += -32;
    }
  }
  ret_val = inta == intb;
  return ret_val;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<olsame_>:
  endbr64
  movzbl (%rdi),%eax
  movzbl (%rsi),%edx
  mov    $0x1,%r8d
  cmp    %dl,%al
  je     L19
  lea    -0x61(%rax),%esi
  mov    %eax,D7(%rip)
  mov    %edx,%ecx
  mov    %edx,D29(%rip)
  cmp    $0x19,%esi
  ja     L15
  sub    $0x20,%eax
  mov    %eax,D16(%rip)
L15:
  lea    -0x61(%rdx),%esi
  cmp    $0x19,%esi
  jbe    L18
L33:
  xor    %r8d,%r8d
  cmp    %ecx,%eax
  sete   %r8b
L19:
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L18:
  lea    -0x20(%rdx),%ecx
  mov    %ecx,D16(%rip)
  jmp    L33
```

assistant: ```c
int olsame_(char *ca, char *cb) {
  int ret_val;
  static int inta, intb, zcode;
  ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
  if (ret_val) {
    return ret_val;
  }
  zcode = 'Z';
  inta = *(unsigned char *)ca;
  intb = *(unsigned char *)cb;
  if (zcode == 90 || zcode == 122) {
    if (inta >= 97 && inta <= 122) {
      inta += -32;
    }
    if (intb >= 97 && intb <= 122) {
      intb += -32;
    }
  } else if (zcode == 233 || zcode == 169) {
    if (inta >= 129 && inta <= 137 || inta >= 145 && inta <= 153 || inta >= 162 && inta <= 169) {
      inta += 64;
    }
    if (intb >= 129 && intb <= 137 || intb >= 145 && intb <= 153 || intb >= 162 && intb <= 169) {
      intb += 64;
    }
  } else if (zcode == 218 || zcode == 250) {
    if (inta >= 225 && inta <= 250) {
      inta += -32;
    }
    if (intb >= 225 && intb <= 250) {
      intb += -32;
    }
  }
  ret_val = inta == intb;
  return ret_val;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<olsame_>:
  endbr64
  movzbl (%rdi),%eax
  movzbl (%rsi),%edx
  mov    $0x1,%r8d
  cmp    %dl,%al
  je     L26
  lea    -0x61(%rax),%esi
  mov    %eax,D6(%rip)
  mov    %edx,%ecx
  mov    %edx,D23(%rip)
  cmp    $0x19,%esi
  ja     L38
  sub    $0x20,%eax
  mov    %eax,D37(%rip)
L38:
  lea    -0x61(%rdx),%esi
  cmp    $0x19,%esi
  jbe    L18
L4:
  xor    %r8d,%r8d
  cmp    %ecx,%eax
  sete   %r8b
L26:
  mov    %r8d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L18:
  lea    -0x20(%rdx),%ecx
  mov    %ecx,D37(%rip)
  jmp    L4
```

assistant: ```c
int olsame_(char *ca, char *cb) {
  int ret_val;
  static int inta, intb, zcode;
  ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
  if (ret_val) {
    return ret_val;
  }
  zcode = 'Z';
  inta = *(unsigned char *)ca;
  intb = *(unsigned char *)cb;
  if (zcode == 90 || zcode == 122) {
    if (inta >= 97 && inta <= 122) {
      inta += -32;
    }
    if (intb >= 97 && intb <= 122) {
      intb += -32;
    }
  } else if (zcode == 233 || zcode == 169) {
    if (inta >= 129 && inta <= 137 || inta >= 145 && inta <= 153 || inta >= 162 && inta <= 169) {
      inta += 64;
    }
    if (intb >= 129 && intb <= 137 || intb >= 145 && intb <= 153 || intb >= 162 && intb <= 169) {
      intb += 64;
    }
  } else if (zcode == 218 || zcode == 250) {
    if (inta >= 225 && inta <= 250) {
      inta += -32;
    }
    if (intb >= 225 && intb <= 250) {
      intb += -32;
    }
  }
  ret_val = inta == intb;
  return ret_val;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<strtol>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  movq   $0x0,-0x8(%rbp)
L26:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  mov    %al,-0xd(%rbp)
  cmpb   $0x2f,-0xd(%rbp)
  jle    L83
  cmpb   $0x39,-0xd(%rbp)
  jg     L83
  movsbl -0xd(%rbp),%eax
  sub    $0x30,%eax
  mov    %eax,-0xc(%rbp)
  jmp    L25
L83:
  cmpb   $0x60,-0xd(%rbp)
  jle    L45
  cmpb   $0x7a,-0xd(%rbp)
  jg     L45
  movsbl -0xd(%rbp),%eax
  sub    $0x57,%eax
  mov    %eax,-0xc(%rbp)
  jmp    L25
L45:
  cmpb   $0x40,-0xd(%rbp)
  jle    L100
  cmpb   $0x5a,-0xd(%rbp)
  jg     L100
  movsbl -0xd(%rbp),%eax
  sub    $0x37,%eax
  mov    %eax,-0xc(%rbp)
L25:
  mov    -0x24(%rbp),%eax
  cmp    -0xc(%rbp),%eax
  jle    L81
  mov    -0x24(%rbp),%eax
  cltq
  imul   -0x8(%rbp),%rax
  mov    %rax,%rdx
  mov    -0xc(%rbp),%eax
  cltq
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  addq   $0x1,-0x18(%rbp)
  jmp    L26
L100:
  nop
  jmp    L87
L81:
  nop
L87:
  cmpq   $0x0,-0x20(%rbp)
  je     L3
  mov    -0x20(%rbp),%rax
  mov    -0x18(%rbp),%rdx
  mov    %rdx,(%rax)
L3:
  mov    -0x8(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
long strtol(const char *nptr, char **endptr, int base) {
  long l = 0;
  char c;
  int n;
  while (1) {
    c = *nptr;
    if ('0' <= c && c <= '9')
      n = c - '0';
    else if ('a' <= c && c <= 'z')
      n = c - 'a' + 10;
    else if ('A' <= c && c <= 'Z')
      n = c - 'A' + 10;
    else
      goto exit;
    if (base <= n)
      goto exit;
    l = l * base + n;
    nptr++;
  }
exit:
  if (endptr)
    *endptr = (char *)nptr;
  return l;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<strtol>:
  endbr64
  mov    %rsi,%r9
  mov    $0x0,%eax
  movslq %edx,%r8
  jmp    L25
L57:
  movsbl %cl,%ecx
  sub    $0x30,%ecx
L5:
  cmp    %edx,%ecx
  jge    L60
  imul   %r8,%rax
  movslq %ecx,%rcx
  add    %rcx,%rax
  add    $0x1,%rdi
L25:
  movzbl (%rdi),%ecx
  lea    -0x30(%rcx),%esi
  cmp    $0x9,%sil
  jbe    L57
  lea    -0x61(%rcx),%esi
  cmp    $0x19,%sil
  ja     L12
  movsbl %cl,%ecx
  sub    $0x57,%ecx
  jmp    L5
L12:
  lea    -0x41(%rcx),%esi
  cmp    $0x19,%sil
  ja     L60
  movsbl %cl,%ecx
  sub    $0x37,%ecx
  jmp    L5
L60:
  test   %r9,%r9
  je     L14
  mov    %rdi,(%r9)
L14:
  ret
```

assistant: ```c
long strtol(const char *nptr, char **endptr, int base) {
  long l = 0;
  char c;
  int n;
  while (1) {
    c = *nptr;
    if ('0' <= c && c <= '9')
      n = c - '0';
    else if ('a' <= c && c <= 'z')
      n = c - 'a' + 10;
    else if ('A' <= c && c <= 'Z')
      n = c - 'A' + 10;
    else
      goto exit;
    if (base <= n)
      goto exit;
    l = l * base + n;
    nptr++;
  }
exit:
  if (endptr)
    *endptr = (char *)nptr;
  return l;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<strtol>:
  endbr64
  mov    %rsi,%r9
  xor    %eax,%eax
  movslq %edx,%r8
  jmp    L64
  xchg   %ax,%ax
L29:
  movsbq %cl,%rcx
L31:
  cmp    %edx,%ecx
  jge    L57
L25:
  imul   %r8,%rax
  add    $0x1,%rdi
  add    %rcx,%rax
L64:
  movzbl (%rdi),%esi
  lea    -0x30(%rsi),%ecx
  cmp    $0x9,%cl
  jbe    L29
  lea    -0x61(%rsi),%ecx
  cmp    $0x19,%cl
  ja     L78
  sub    $0x57,%esi
  movsbq %sil,%rcx
  cmp    %edx,%ecx
  jl     L25
L57:
  test   %r9,%r9
  je     L68
  mov    %rdi,(%r9)
L68:
  ret
  nopw   0x0(%rax,%rax,1)
L78:
  lea    -0x41(%rsi),%ecx
  cmp    $0x19,%cl
  ja     L57
  sub    $0x37,%esi
  movsbq %sil,%rcx
  jmp    L31
```

assistant: ```c
long strtol(const char *nptr, char **endptr, int base) {
  long l = 0;
  char c;
  int n;
  while (1) {
    c = *nptr;
    if ('0' <= c && c <= '9')
      n = c - '0';
    else if ('a' <= c && c <= 'z')
      n = c - 'a' + 10;
    else if ('A' <= c && c <= 'Z')
      n = c - 'A' + 10;
    else
      goto exit;
    if (base <= n)
      goto exit;
    l = l * base + n;
    nptr++;
  }
exit:
  if (endptr)
    *endptr = (char *)nptr;
  return l;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<strtol>:
  endbr64
  mov    %rsi,%r9
  xor    %eax,%eax
  movslq %edx,%r8
  jmp    L23
  xchg   %ax,%ax
L28:
  movsbq %cl,%rcx
L4:
  cmp    %edx,%ecx
  jge    L43
L39:
  imul   %r8,%rax
  add    $0x1,%rdi
  add    %rcx,%rax
L23:
  movzbl (%rdi),%esi
  lea    -0x30(%rsi),%ecx
  cmp    $0x9,%cl
  jbe    L28
  lea    -0x61(%rsi),%ecx
  cmp    $0x19,%cl
  ja     L53
  sub    $0x57,%esi
  movsbq %sil,%rcx
  cmp    %edx,%ecx
  jl     L39
L43:
  test   %r9,%r9
  je     L29
  mov    %rdi,(%r9)
L29:
  ret
  nopw   0x0(%rax,%rax,1)
L53:
  lea    -0x41(%rsi),%ecx
  cmp    $0x19,%cl
  ja     L43
  sub    $0x37,%esi
  movsbq %sil,%rcx
  jmp    L4
```

assistant: ```c
long strtol(const char *nptr, char **endptr, int base) {
  long l = 0;
  char c;
  int n;
  while (1) {
    c = *nptr;
    if ('0' <= c && c <= '9')
      n = c - '0';
    else if ('a' <= c && c <= 'z')
      n = c - 'a' + 10;
    else if ('A' <= c && c <= 'Z')
      n = c - 'A' + 10;
    else
      goto exit;
    if (base <= n)
      goto exit;
    l = l * base + n;
    nptr++;
  }
exit:
  if (endptr)
    *endptr = (char *)nptr;
  return l;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<utf8len>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  movl   $0x1,-0x4(%rbp)
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L15
  mov    $0x0,%eax
  jmp    L21
L15:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,%edi
  call   <isascii@plt>
  test   %rax,%rax
  jne    L40
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  and    $0xc0,%eax
  cmp    $0x80,%eax
  jne    L34
L40:
  mov    $0x0,%eax
  jmp    L21
L34:
  addq   $0x1,-0x18(%rbp)
  jmp    L55
L56:
  addl   $0x1,-0x4(%rbp)
L55:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  and    $0xc0,%eax
  cmp    $0x80,%eax
  je     L56
  mov    -0x4(%rbp),%eax
L21:
  leave
  ret
```

assistant: ```c
int utf8len(const char *p) {
  int len = 1;
  if (*p == '\0')
    return 0;
  if (isascii((unsigned char)*p) || (((unsigned char)*p) & 0xc0) == 0x80)
    return 0;
  p++;
  while ((((unsigned char)*p++) & 0xc0) == 0x80)
    len++;
  return len;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<utf8len>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  movzbl (%rdi),%edi
  mov    $0x0,%ecx
  test   %dil,%dil
  jne    L22
L2:
  mov    %ecx,%eax
  pop    %rbx
  ret
L22:
  movzbl %dil,%edi
  call   <isascii@plt>
  mov    $0x0,%ecx
  test   %rax,%rax
  jne    L2
  movzbl (%rbx),%eax
  and    $0xffffffc0,%eax
  cmp    $0x80,%al
  je     L2
  lea    0x2(%rbx),%rax
  movzbl 0x1(%rbx),%edx
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  jne    L57
  neg    %ebx
L42:
  lea    (%rbx,%rax,1),%ecx
  add    $0x1,%rax
  movzbl -0x1(%rax),%edx
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  je     L42
  jmp    L2
L57:
  mov    $0x1,%ecx
  jmp    L2
```

assistant: ```c
int utf8len(const char *p) {
  int len = 1;
  if (*p == '\0')
    return 0;
  if (isascii((unsigned char)*p) || (((unsigned char)*p) & 0xc0) == 0x80)
    return 0;
  p++;
  while ((((unsigned char)*p++) & 0xc0) == 0x80)
    len++;
  return len;
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<utf8len>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  movzbl (%rdi),%edi
  test   %dil,%dil
  jne    L55
L52:
  xor    %r8d,%r8d
L50:
  mov    %r8d,%eax
  pop    %rbx
  ret
  nopl   0x0(%rax,%rax,1)
L55:
  call   <isascii@plt>
  test   %rax,%rax
  jne    L52
  movzbl (%rbx),%eax
  and    $0xffffffc0,%eax
  cmp    $0x80,%al
  je     L52
  movzbl 0x1(%rbx),%edx
  lea    0x2(%rbx),%rax
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  jne    L33
  mov    $0x2,%ecx
  sub    %eax,%ecx
  nopl   0x0(%rax,%rax,1)
L9:
  lea    (%rcx,%rax,1),%r8d
  movzbl (%rax),%edx
  add    $0x1,%rax
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  je     L9
  mov    %r8d,%eax
  pop    %rbx
  ret
  nopl   0x0(%rax,%rax,1)
L33:
  mov    $0x1,%r8d
  jmp    L50
```

assistant: ```c
int utf8len(const char *p) {
  int len = 1;
  if (*p == '\0')
    return 0;
  if (isascii((unsigned char)*p) || (((unsigned char)*p) & 0xc0) == 0x80)
    return 0;
  p++;
  while ((((unsigned char)*p++) & 0xc0) == 0x80)
    len++;
  return len;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<utf8len>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  movzbl (%rdi),%edi
  test   %dil,%dil
  jne    L31
L57:
  xor    %r8d,%r8d
L0:
  mov    %r8d,%eax
  pop    %rbx
  ret
  nopl   0x0(%rax,%rax,1)
L31:
  call   <isascii@plt>
  test   %rax,%rax
  jne    L57
  movzbl (%rbx),%eax
  and    $0xffffffc0,%eax
  cmp    $0x80,%al
  je     L57
  movzbl 0x1(%rbx),%edx
  lea    0x2(%rbx),%rax
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  jne    L39
  mov    $0x2,%ecx
  sub    %eax,%ecx
  nopl   0x0(%rax,%rax,1)
L52:
  lea    (%rcx,%rax,1),%r8d
  movzbl (%rax),%edx
  add    $0x1,%rax
  and    $0xffffffc0,%edx
  cmp    $0x80,%dl
  je     L52
  mov    %r8d,%eax
  pop    %rbx
  ret
  nopl   0x0(%rax,%rax,1)
L39:
  mov    $0x1,%r8d
  jmp    L0
```

assistant: ```c
int utf8len(const char *p) {
  int len = 1;
  if (*p == '\0')
    return 0;
  if (isascii((unsigned char)*p) || (((unsigned char)*p) & 0xc0) == 0x80)
    return 0;
  p++;
  while ((((unsigned char)*p++) & 0xc0) == 0x80)
    len++;
  return len;
}
```