ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Converte this assembly snippet into its equivalent C code:

```asm
<alpha_map>:
  endbr64
  cmp    $0x47,%dil
  ja     L6
  movzbl %dil,%eax
  lea    D1(%rip),%rdx
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  mov    $0x20,%eax
  ret
  lea    0x30(%rdi),%eax
  ret
  lea    0x36(%rdi),%eax
  ret
  lea    0x3c(%rdi),%eax
  ret
  mov    $0x2d,%eax
  ret
  mov    $0x25,%eax
  ret
  mov    $0x2f,%eax
  ret
  mov    $0x28,%eax
  ret
  mov    $0x29,%eax
  ret
  mov    $0x2a,%eax
  ret
  mov    $0x2b,%eax
  ret
  mov    $0x2e,%eax
  ret
  mov    $0x3a,%eax
  ret
L6:
  mov    $0x3f,%eax
  ret
```

assistant: ```c
char alpha_map(unsigned char c) {
  char a = '?';
  switch (c) {
  case 0:
  case 1:
  case 2:
  case 3:
  case 4:
  case 5:
  case 6:
  case 7:
  case 8:
  case 9:
    a = '0' + c;
    break;
  case 10:
    a = ' ';
    break;
  case 11:
  case 12:
  case 13:
  case 14:
  case 15:
  case 16:
  case 17:
  case 18:
  case 19:
  case 20:
  case 21:
  case 22:
  case 23:
  case 24:
  case 25:
  case 26:
  case 27:
  case 28:
  case 29:
  case 30:
  case 31:
  case 32:
  case 33:
  case 34:
  case 35:
  case 36:
    a = 'A' + c - 11;
    break;
  case 37:
  case 38:
  case 39:
  case 40:
  case 41:
  case 42:
  case 43:
  case 44:
  case 45:
  case 46:
  case 47:
  case 48:
  case 49:
  case 50:
  case 51:
  case 52:
  case 53:
  case 54:
  case 55:
  case 56:
  case 57:
  case 58:
  case 59:
  case 60:
  case 61:
  case 62:
    a = 'a' + c - 37;
    break;
  case 63:
    a = '-';
    break;
  case 64:
    a = '%';
    break;
  case 65:
    a = '/';
    break;
  case 66:
    a = '(';
    break;
  case 67:
    a = ')';
    break;
  case 68:
    a = '*';
    break;
  case 69:
    a = '+';
    break;
  case 70:
    a = '.';
    break;
  case 71:
    a = ':';
    break;
  case 72:
    a = '?';
    break;
  default:
    break;
  }
  return a;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<alpha_map>:
  endbr64
  cmp    $0x47,%dil
  ja     1040 <alpha_map.cold>
  lea    D5(%rip),%rdx
  movzbl %dil,%eax
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  nopl   0x0(%rax,%rax,1)
  lea    0x3c(%rdi),%eax
  ret
  nopl   0x0(%rax)
  lea    0x36(%rdi),%eax
  ret
  nopl   0x0(%rax)
  lea    0x30(%rdi),%eax
  ret
  nopl   0x0(%rax)
  mov    $0x2e,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x3a,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2d,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x25,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2f,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x28,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x29,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2a,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2b,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x20,%eax
  ret
```

assistant: ```c
char alpha_map(unsigned char c) {
  char a = '?';
  switch (c) {
  case 0:
  case 1:
  case 2:
  case 3:
  case 4:
  case 5:
  case 6:
  case 7:
  case 8:
  case 9:
    a = '0' + c;
    break;
  case 10:
    a = ' ';
    break;
  case 11:
  case 12:
  case 13:
  case 14:
  case 15:
  case 16:
  case 17:
  case 18:
  case 19:
  case 20:
  case 21:
  case 22:
  case 23:
  case 24:
  case 25:
  case 26:
  case 27:
  case 28:
  case 29:
  case 30:
  case 31:
  case 32:
  case 33:
  case 34:
  case 35:
  case 36:
    a = 'A' + c - 11;
    break;
  case 37:
  case 38:
  case 39:
  case 40:
  case 41:
  case 42:
  case 43:
  case 44:
  case 45:
  case 46:
  case 47:
  case 48:
  case 49:
  case 50:
  case 51:
  case 52:
  case 53:
  case 54:
  case 55:
  case 56:
  case 57:
  case 58:
  case 59:
  case 60:
  case 61:
  case 62:
    a = 'a' + c - 37;
    break;
  case 63:
    a = '-';
    break;
  case 64:
    a = '%';
    break;
  case 65:
    a = '/';
    break;
  case 66:
    a = '(';
    break;
  case 67:
    a = ')';
    break;
  case 68:
    a = '*';
    break;
  case 69:
    a = '+';
    break;
  case 70:
    a = '.';
    break;
  case 71:
    a = ':';
    break;
  case 72:
    a = '?';
    break;
  default:
    break;
  }
  return a;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<alpha_map>:
  endbr64
  cmp    $0x47,%dil
  ja     1040 <alpha_map.cold>
  lea    D8(%rip),%rdx
  movzbl %dil,%eax
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  nopl   0x0(%rax,%rax,1)
  lea    0x3c(%rdi),%eax
  ret
  nopl   0x0(%rax)
  lea    0x36(%rdi),%eax
  ret
  nopl   0x0(%rax)
  lea    0x30(%rdi),%eax
  ret
  nopl   0x0(%rax)
  mov    $0x2e,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x3a,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2d,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x25,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2f,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x28,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x29,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2a,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x2b,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
  mov    $0x20,%eax
  ret
```

assistant: ```c
char alpha_map(unsigned char c) {
  char a = '?';
  switch (c) {
  case 0:
  case 1:
  case 2:
  case 3:
  case 4:
  case 5:
  case 6:
  case 7:
  case 8:
  case 9:
    a = '0' + c;
    break;
  case 10:
    a = ' ';
    break;
  case 11:
  case 12:
  case 13:
  case 14:
  case 15:
  case 16:
  case 17:
  case 18:
  case 19:
  case 20:
  case 21:
  case 22:
  case 23:
  case 24:
  case 25:
  case 26:
  case 27:
  case 28:
  case 29:
  case 30:
  case 31:
  case 32:
  case 33:
  case 34:
  case 35:
  case 36:
    a = 'A' + c - 11;
    break;
  case 37:
  case 38:
  case 39:
  case 40:
  case 41:
  case 42:
  case 43:
  case 44:
  case 45:
  case 46:
  case 47:
  case 48:
  case 49:
  case 50:
  case 51:
  case 52:
  case 53:
  case 54:
  case 55:
  case 56:
  case 57:
  case 58:
  case 59:
  case 60:
  case 61:
  case 62:
    a = 'a' + c - 37;
    break;
  case 63:
    a = '-';
    break;
  case 64:
    a = '%';
    break;
  case 65:
    a = '/';
    break;
  case 66:
    a = '(';
    break;
  case 67:
    a = ')';
    break;
  case 68:
    a = '*';
    break;
  case 69:
    a = '+';
    break;
  case 70:
    a = '.';
    break;
  case 71:
    a = ':';
    break;
  case 72:
    a = '?';
    break;
  default:
    break;
  }
  return a;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<deduplicate_strings>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  movq   $0x0,-0x10(%rbp)
  jmp    L38
L56:
  mov    -0x10(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  test   %rax,%rax
  je     L5
  movq   $0x0,-0x8(%rbp)
  jmp    L76
L41:
  mov    -0x8(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  test   %rax,%rax
  je     L37
  mov    -0x8(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x10(%rbp),%rax
  lea    0x0(,%rax,8),%rcx
  mov    -0x18(%rbp),%rax
  add    %rcx,%rax
  mov    (%rax),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L65
  mov    -0x8(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movq   $0x0,(%rax)
  jmp    L65
L37:
  nop
L65:
  addq   $0x1,-0x8(%rbp)
L76:
  mov    -0x8(%rbp),%rax
  cmp    -0x10(%rbp),%rax
  jb     L41
  jmp    L80
L5:
  nop
L80:
  addq   $0x1,-0x10(%rbp)
L38:
  mov    -0x10(%rbp),%rax
  cmp    -0x20(%rbp),%rax
  jb     L56
  nop
  nop
  leave
  ret
```

assistant: ```c
void deduplicate_strings(const char **strs, size_t strs_len) {
  for (size_t i = 0; i < strs_len; i++) {
    if (strs[i] == NULL)
      continue;
    for (size_t j = 0; j < i; j++) {
      if (strs[j] == NULL)
        continue;
      if (strcmp(strs[i], strs[j]) == 0)
        strs[j] = NULL;
    }
  }
}
```
user: What is the c source code of the assembly code below:

```asm
<deduplicate_strings>:
  endbr64
  test   %rsi,%rsi
  je     L2
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%r12
  mov    %rsi,%r13
  mov    $0x0,%ebp
  jmp    L68
L6:
  add    $0x1,%rbx
  cmp    %rbp,%rbx
  je     L81
L49:
  mov    (%r12,%rbx,8),%rsi
  test   %rsi,%rsi
  je     L6
  mov    (%r12,%rbp,8),%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L6
  movq   $0x0,(%r12,%rbx,8)
  jmp    L6
L81:
  add    $0x1,%rbp
  cmp    %rbp,%r13
  je     L19
L68:
  cmpq   $0x0,(%r12,%rbp,8)
  je     L81
  test   %rbp,%rbp
  je     L81
  mov    $0x0,%ebx
  jmp    L49
L19:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L2:
  ret
```

assistant: ```c
void deduplicate_strings(const char **strs, size_t strs_len) {
  for (size_t i = 0; i < strs_len; i++) {
    if (strs[i] == NULL)
      continue;
    for (size_t j = 0; j < i; j++) {
      if (strs[j] == NULL)
        continue;
      if (strcmp(strs[i], strs[j]) == 0)
        strs[j] = NULL;
    }
  }
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<deduplicate_strings>:
  endbr64
  test   %rsi,%rsi
  je     L26
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  nopl   (%rax)
L43:
  cmpq   $0x0,0x0(%rbp)
  je     L41
  test   %r12,%r12
  je     L41
  mov    %r14,%rbx
  nop
L61:
  mov    (%rbx),%rsi
  test   %rsi,%rsi
  je     L36
  mov    0x0(%rbp),%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L36
  movq   $0x0,(%rbx)
L36:
  add    $0x8,%rbx
  cmp    %rbp,%rbx
  jne    L61
L41:
  add    $0x1,%r12
  add    $0x8,%rbp
  cmp    %r12,%r13
  jne    L43
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L26:
  ret
```

assistant: ```c
void deduplicate_strings(const char **strs, size_t strs_len) {
  for (size_t i = 0; i < strs_len; i++) {
    if (strs[i] == NULL)
      continue;
    for (size_t j = 0; j < i; j++) {
      if (strs[j] == NULL)
        continue;
      if (strcmp(strs[i], strs[j]) == 0)
        strs[j] = NULL;
    }
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<deduplicate_strings>:
  endbr64
  test   %rsi,%rsi
  je     L6
  push   %r14
  mov    %rdi,%r14
  push   %r13
  mov    %rsi,%r13
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  nopl   (%rax)
L19:
  cmpq   $0x0,0x0(%rbp)
  je     L53
  test   %r12,%r12
  je     L53
  mov    %r14,%rbx
  nop
L50:
  mov    (%rbx),%rsi
  test   %rsi,%rsi
  je     L27
  mov    0x0(%rbp),%rdi
  call   <strcmp@plt>
  test   %rax,%rax
  jne    L27
  movq   $0x0,(%rbx)
L27:
  add    $0x8,%rbx
  cmp    %rbp,%rbx
  jne    L50
L53:
  add    $0x1,%r12
  add    $0x8,%rbp
  cmp    %r12,%r13
  jne    L19
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
L6:
  ret
```

assistant: ```c
void deduplicate_strings(const char **strs, size_t strs_len) {
  for (size_t i = 0; i < strs_len; i++) {
    if (strs[i] == NULL)
      continue;
    for (size_t j = 0; j < i; j++) {
      if (strs[j] == NULL)
        continue;
      if (strcmp(strs[i], strs[j]) == 0)
        strs[j] = NULL;
    }
  }
}
```
user: 这段汇编代码用C语言表示是什么样的:

```asm
<i2c_smbus_access>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %edx,%eax
  mov    %ecx,-0x40(%rbp)
  mov    %r8,-0x48(%rbp)
  mov    %esi,%edx
  mov    %dl,-0x38(%rbp)
  mov    %al,-0x3c(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movzbl -0x38(%rbp),%eax
  mov    %al,-0x20(%rbp)
  movzbl -0x3c(%rbp),%eax
  mov    %al,-0x1f(%rbp)
  mov    -0x40(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    D16(%rip),%rax
  mov    (%rax),%ecx
  lea    -0x20(%rbp),%rdx
  mov    -0x34(%rbp),%eax
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <ioctl@plt>
  mov    %rax,-0x28(%rbp)
  cmpq   $0xffffffffffffffff,-0x28(%rbp)
  jne    L4
  mov    D17(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
  mov    %rax,-0x28(%rbp)
L4:
  mov    -0x28(%rbp),%rax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L15
  call   <__stack_chk_fail@plt>
L15:
  leave
  ret
```

assistant: ```c
long i2c_smbus_access(int file, char read_write, unsigned char command, int size, union i2c_smbus_data *data) {
  struct i2c_smbus_ioctl_data args;
  long err;
  args.read_write = read_write;
  args.command = command;
  args.size = size;
  args.data = data;
  err = ioctl(file, I2C_SMBUS, &args);
  if (err == -1)
    err = -errno;
  return err;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<i2c_smbus_access>:
  endbr64
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  mov    %sil,(%rsp)
  mov    %dl,0x1(%rsp)
  mov    %ecx,0x4(%rsp)
  mov    %r8,0x8(%rsp)
  mov    %rsp,%rdx
  mov    D5(%rip),%rax
  mov    (%rax),%esi
  call   <ioctl@plt>
  cmp    $0xffffffffffffffff,%rax
  je     L28
L25:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L20
  add    $0x28,%rsp
  ret
L28:
  mov    D16(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
  jmp    L25
L20:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
long i2c_smbus_access(int file, char read_write, unsigned char command, int size, union i2c_smbus_data *data) {
  struct i2c_smbus_ioctl_data args;
  long err;
  args.read_write = read_write;
  args.command = command;
  args.size = size;
  args.data = data;
  err = ioctl(file, I2C_SMBUS, &args);
  if (err == -1)
    err = -errno;
  return err;
}
```
user: Translate the below assembly code into C programming language:

```asm
<i2c_smbus_access>:
  endbr64
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  mov    D18(%rip),%rax
  mov    %sil,(%rsp)
  mov    %dl,0x1(%rsp)
  mov    %rsp,%rdx
  mov    (%rax),%esi
  mov    %ecx,0x4(%rsp)
  mov    %r8,0x8(%rsp)
  call   <ioctl@plt>
  cmp    $0xffffffffffffffff,%rax
  jne    L2
  mov    D3(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
L2:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L3
  add    $0x28,%rsp
  ret
L3:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
long i2c_smbus_access(int file, char read_write, unsigned char command, int size, union i2c_smbus_data *data) {
  struct i2c_smbus_ioctl_data args;
  long err;
  args.read_write = read_write;
  args.command = command;
  args.size = size;
  args.data = data;
  err = ioctl(file, I2C_SMBUS, &args);
  if (err == -1)
    err = -errno;
  return err;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<i2c_smbus_access>:
  endbr64
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  mov    D19(%rip),%rax
  mov    %sil,(%rsp)
  mov    %dl,0x1(%rsp)
  mov    %rsp,%rdx
  mov    (%rax),%esi
  mov    %ecx,0x4(%rsp)
  mov    %r8,0x8(%rsp)
  call   <ioctl@plt>
  cmp    $0xffffffffffffffff,%rax
  jne    L12
  mov    D7(%rip),%rax
  mov    (%rax),%rax
  neg    %rax
L12:
  mov    0x18(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L2
  add    $0x28,%rsp
  ret
L2:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
long i2c_smbus_access(int file, char read_write, unsigned char command, int size, union i2c_smbus_data *data) {
  struct i2c_smbus_ioctl_data args;
  long err;
  args.read_write = read_write;
  args.command = command;
  args.size = size;
  args.data = data;
  err = ioctl(file, I2C_SMBUS, &args);
  if (err == -1)
    err = -errno;
  return err;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<strrindex>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0x4(%rbp)
  movl   $0x0,-0x10(%rbp)
  jmp    L20
L46:
  mov    -0x10(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  movl   $0x0,-0x8(%rbp)
  jmp    L34
L76:
  addl   $0x1,-0xc(%rbp)
  addl   $0x1,-0x8(%rbp)
L34:
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L18
  mov    -0xc(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%edx
  mov    -0x8(%rbp),%eax
  movslq %eax,%rcx
  mov    -0x20(%rbp),%rax
  add    %rcx,%rax
  movzbl (%rax),%eax
  cmp    %al,%dl
  je     L76
L18:
  cmpl   $0x0,-0x8(%rbp)
  jle    L52
  mov    -0x8(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L52
  mov    -0x10(%rbp),%eax
  mov    %eax,-0x4(%rbp)
L52:
  addl   $0x1,-0x10(%rbp)
L20:
  mov    -0x10(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L46
  cmpl   $0x0,-0x4(%rbp)
  je     L50
  mov    -0x4(%rbp),%eax
  jmp    L35
L50:
  mov    $0xffffffff,%eax
L35:
  pop    %rbp
  ret
```

assistant: ```c
int strrindex(char s[], char f[]) {
  int i, j, k, saved;
  saved = 0;
  for (i = 0; s[i] != '\0'; i++) {
    for (j = i, k = 0; f[k] != '\0' && s[j] == f[k]; j++, k++) {
      ;
    }
    if (k > 0 && f[k] == '\0') {
      saved = i;
    }
  }
  if (saved) {
    return saved;
  } else {
    return -1;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<strrindex>:
  endbr64
  cmpb   $0x0,(%rdi)
  je     L0
  movzbl (%rsi),%r9d
  mov    $0x0,%r10d
  mov    $0x0,%r8d
  jmp    L79
L56:
  test   %dl,%dl
  jne    L72
  test   %ecx,%ecx
  cmovg  %r8d,%r10d
L72:
  add    $0x1,%r8d
  add    $0x1,%rdi
  cmpb   $0x0,(%rdi)
  je     L16
L79:
  mov    %r9d,%edx
  mov    $0x0,%eax
  test   %r9b,%r9b
  je     L72
L12:
  mov    %eax,%ecx
  cmp    %dl,(%rdi,%rax,1)
  jne    L56
  lea    0x1(%rax),%ecx
  add    $0x1,%rax
  movzbl (%rsi,%rax,1),%edx
  test   %dl,%dl
  jne    L12
  jmp    L56
L16:
  test   %r10d,%r10d
  je     L66
L38:
  mov    %r10d,%eax
  ret
L66:
  mov    $0xffffffff,%r10d
  jmp    L38
L0:
  mov    $0xffffffff,%r10d
  jmp    L38
```

assistant: ```c
int strrindex(char s[], char f[]) {
  int i, j, k, saved;
  saved = 0;
  for (i = 0; s[i] != '\0'; i++) {
    for (j = i, k = 0; f[k] != '\0' && s[j] == f[k]; j++, k++) {
      ;
    }
    if (k > 0 && f[k] == '\0') {
      saved = i;
    }
  }
  if (saved) {
    return saved;
  } else {
    return -1;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<strrindex>:
  endbr64
  cmpb   $0x0,(%rdi)
  je     L29
  movzbl (%rsi),%r8d
  xor    %ecx,%ecx
  xor    %r10d,%r10d
  nopw   0x0(%rax,%rax,1)
L46:
  mov    %ecx,%r9d
  mov    %rcx,%rax
  mov    %r8d,%edx
  test   %r8b,%r8b
  jne    L2
  jmp    L57
  nopl   0x0(%rax,%rax,1)
L49:
  add    $0x1,%rax
  movzbl (%rsi,%rax,1),%edx
  test   %dl,%dl
  je     L34
L2:
  cmp    %dl,(%rdi,%rax,1)
  je     L49
L57:
  movzbl 0x1(%rdi,%rcx,1),%eax
  sub    $0x1,%rsi
  add    $0x1,%rcx
  test   %al,%al
  jne    L46
  test   %r10d,%r10d
  je     L29
  mov    %r10d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L34:
  mov    %r9d,%r10d
  jmp    L57
L29:
  mov    $0xffffffff,%r10d
  mov    %r10d,%eax
  ret
```

assistant: ```c
int strrindex(char s[], char f[]) {
  int i, j, k, saved;
  saved = 0;
  for (i = 0; s[i] != '\0'; i++) {
    for (j = i, k = 0; f[k] != '\0' && s[j] == f[k]; j++, k++) {
      ;
    }
    if (k > 0 && f[k] == '\0') {
      saved = i;
    }
  }
  if (saved) {
    return saved;
  } else {
    return -1;
  }
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<strrindex>:
  endbr64
  cmpb   $0x0,(%rdi)
  je     L13
  movzbl (%rsi),%r8d
  xor    %ecx,%ecx
  xor    %r10d,%r10d
  nopw   0x0(%rax,%rax,1)
L30:
  mov    %ecx,%r9d
  mov    %rcx,%rax
  mov    %r8d,%edx
  test   %r8b,%r8b
  jne    L55
  jmp    L65
  nopl   0x0(%rax,%rax,1)
L50:
  add    $0x1,%rax
  movzbl (%rsi,%rax,1),%edx
  test   %dl,%dl
  je     L10
L55:
  cmp    %dl,(%rdi,%rax,1)
  je     L50
L65:
  movzbl 0x1(%rdi,%rcx,1),%eax
  sub    $0x1,%rsi
  add    $0x1,%rcx
  test   %al,%al
  jne    L30
  test   %r10d,%r10d
  je     L13
  mov    %r10d,%eax
  ret
  nopl   0x0(%rax,%rax,1)
L10:
  mov    %r9d,%r10d
  jmp    L65
L13:
  mov    $0xffffffff,%r10d
  mov    %r10d,%eax
  ret
```

assistant: ```c
int strrindex(char s[], char f[]) {
  int i, j, k, saved;
  saved = 0;
  for (i = 0; s[i] != '\0'; i++) {
    for (j = i, k = 0; f[k] != '\0' && s[j] == f[k]; j++, k++) {
      ;
    }
    if (k > 0 && f[k] == '\0') {
      saved = i;
    }
  }
  if (saved) {
    return saved;
  } else {
    return -1;
  }
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<err_quit>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  nop
  leave
  ret
```

assistant: ```c
void err_quit(char *msg) {
  perror(msg);
  exit(1);
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<err_quit>:
  endbr64
  sub    $0x8,%rsp
  call   <perror@plt>
  mov    $0x1,%edi
  call   <exit@plt>
  add    $0x8,%rsp
  ret
```

assistant: ```c
void err_quit(char *msg) {
  perror(msg);
  exit(1);
}
```
user: Translate the below assembly code into C programming language:

```asm
<err_quit>:
  endbr64
  sub    $0x8,%rsp
  call   <perror@plt>
  mov    $0x1,%edi
  add    $0x8,%rsp
  jmp    1070 <exit@plt>
```

assistant: ```c
void err_quit(char *msg) {
  perror(msg);
  exit(1);
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<err_quit>:
  endbr64
  sub    $0x8,%rsp
  call   <perror@plt>
  mov    $0x1,%edi
  add    $0x8,%rsp
  jmp    1070 <exit@plt>
```

assistant: ```c
void err_quit(char *msg) {
  perror(msg);
  exit(1);
}
```
user: Translate the below assembly code into C programming language:

```asm
<identifier>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    $0x0,%ebx
  jmp    L19
L11:
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  mov    %ebx,%edx
  lea    0x1(%rdx),%ebx
  movslq %edx,%rcx
  mov    -0x20(%rbp),%rdx
  add    %rcx,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
L19:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isalnum@plt>
  test   %rax,%rax
  jne    L11
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x24,%al
  je     L11
  movslq %ebx,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x18(%rbp),%rax
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
char *identifier(char *expr, char *name) {
  register int l;
  l = 0;
  while (isalnum(*expr) || *expr == '$')
    name[l++] = *expr++;
  name[l] = '\0';
  return expr;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<identifier>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%r12
  mov    $0x0,%ebp
  jmp    L3
L21:
  add    $0x1,%rbx
  movzbl -0x1(%rbx),%eax
  mov    %al,(%r12,%rbp,1)
  add    $0x1,%rbp
L3:
  movsbl (%rbx),%edi
  call   <isalnum@plt>
  test   %rax,%rax
  jne    L21
  cmpb   $0x24,(%rbx)
  je     L21
  movslq %ebp,%r13
  movb   $0x0,(%r12,%r13,1)
  mov    %rbx,%rax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
char *identifier(char *expr, char *name) {
  register int l;
  l = 0;
  while (isalnum(*expr) || *expr == '$')
    name[l++] = *expr++;
  name[l] = '\0';
  return expr;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<identifier>:
  endbr64
  push   %r13
  mov    %rsi,%r13
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  push   %rbx
  xor    %ebx,%ebx
  sub    $0x8,%rsp
  jmp    L7
  nopl   0x0(%rax,%rax,1)
L28:
  mov    %al,0x0(%r13,%rbx,1)
  add    $0x1,%r12
  add    $0x1,%rbx
L7:
  movsbl (%r12),%edi
  movslq %ebx,%rbp
  call   <isalnum@plt>
  test   %rax,%rax
  movzbl (%r12),%eax
  jne    L28
  cmp    $0x24,%al
  je     L28
  movb   $0x0,0x0(%r13,%rbp,1)
  add    $0x8,%rsp
  mov    %r12,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
char *identifier(char *expr, char *name) {
  register int l;
  l = 0;
  while (isalnum(*expr) || *expr == '$')
    name[l++] = *expr++;
  name[l] = '\0';
  return expr;
}
```