ylfeng/ReF-Decompile-dataset huggingface dataset:
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<csql_rand_fill_16>:
  endbr64
  push   %r12
  lea    0x10(%rdi),%r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rbp
L8:
  xor    %eax,%eax
  call   <csql_rand_get@plt>
  mov    %rbx,%rdi
  mov    $0x4,%edx
  mov    %rbp,%rsi
  add    $0x4,%rbx
  mov    %eax,0x4(%rsp)
  call   <memcpy@plt>
  cmp    %r12,%rbx
  jne    L8
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L14
  add    $0x10,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L14:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void csql_rand_fill_16(char *buf) {
  unsigned int randint, i, times;
  times = 16 / sizeof(unsigned int);
  for (i = 0; i < times; i++) {
    randint = csql_rand_get();
    memcpy(buf + (i * sizeof(unsigned int)), &randint, sizeof(unsigned int));
  }
}
```
user: Translate the below assembly code into C programming language:

```asm
<str_replace>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,%ecx
  mov    %edx,%eax
  mov    %ecx,%edx
  mov    %dl,-0x1c(%rbp)
  mov    %al,-0x20(%rbp)
  movl   $0x0,-0x4(%rbp)
  jmp    L1
L7:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    %al,-0x1c(%rbp)
  jne    L26
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rax,%rdx
  movzbl -0x20(%rbp),%eax
  mov    %al,(%rdx)
L26:
  addl   $0x1,-0x4(%rbp)
L1:
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  cmp    %eax,-0x4(%rbp)
  jl     L7
  nop
  nop
  leave
  ret
```

assistant: ```c
void str_replace(char *text, char zn, char one) {
  for (int i = 0; i < strlen(text); i++) {
    if (text[i] == zn) {
      text[i] = one;
    }
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<str_replace>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbp
  mov    %esi,%r12d
  mov    %edx,%r13d
  mov    $0x0,%ebx
  jmp    L6
L28:
  add    $0x1,%rbx
L6:
  mov    %rbp,%rdi
  call   <strlen@plt>
  cmp    %ebx,%eax
  jle    L33
  cmp    %r12b,0x0(%rbp,%rbx,1)
  jne    L28
  mov    %r13b,0x0(%rbp,%rbx,1)
  jmp    L28
L33:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
void str_replace(char *text, char zn, char one) {
  for (int i = 0; i < strlen(text); i++) {
    if (text[i] == zn) {
      text[i] = one;
    }
  }
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<str_replace>:
  endbr64
  push   %r13
  mov    %edx,%r13d
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  xor    %ebx,%ebx
  sub    $0x8,%rsp
  jmp    L24
  nopl   0x0(%rax,%rax,1)
L4:
  cmp    %r12b,0x0(%rbp,%rbx,1)
  jne    L15
  mov    %r13b,0x0(%rbp,%rbx,1)
L15:
  add    $0x1,%rbx
L24:
  mov    %rbp,%rdi
  call   <strlen@plt>
  cmp    %ebx,%eax
  jg     L4
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
void str_replace(char *text, char zn, char one) {
  for (int i = 0; i < strlen(text); i++) {
    if (text[i] == zn) {
      text[i] = one;
    }
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<str_replace>:
  endbr64
  push   %r13
  mov    %edx,%r13d
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  xor    %ebx,%ebx
  sub    $0x8,%rsp
  jmp    L13
  nopl   0x0(%rax,%rax,1)
L12:
  cmp    %r12b,0x0(%rbp,%rbx,1)
  jne    L8
  mov    %r13b,0x0(%rbp,%rbx,1)
L8:
  add    $0x1,%rbx
L13:
  mov    %rbp,%rdi
  call   <strlen@plt>
  cmp    %ebx,%eax
  jg     L12
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
void str_replace(char *text, char zn, char one) {
  for (int i = 0; i < strlen(text); i++) {
    if (text[i] == zn) {
      text[i] = one;
    }
  }
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<setup_gpio>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <export_gpio_pin@plt>
  test   %rax,%rax
  jns    L55
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L4
L55:
  mov    $0x2,%edi
  call   <sleep@plt>
  mov    -0x8(%rbp),%rax
  mov    %rax,%rdi
  call   <set_gpio_direction@plt>
  test   %rax,%rax
  jns    L33
  lea    D16(%rip),%rax
  mov    %rax,%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L4
L33:
  mov    -0x10(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <set_gpio_trigger_mode@plt>
  test   %rax,%rax
  jns    L50
  lea    D24(%rip),%rax
  mov    %rax,%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L4
L50:
  mov    $0x0,%eax
L4:
  leave
  ret
```

tool_calls: name: read_data
arguments: tag: D18
data_type: string
name: read_data
arguments: tag: D16
data_type: string
name: read_data
arguments: tag: D24
data_type: string

tool: D18: export_gpio_pin() failed

tool: D16: set_gpio_direction() failed

tool: D24: set_gpio_trigger_mode() failed

assistant: ```c
int setup_gpio(const char *gpio_pin, const char *gpio_trigger_mode) {
  if (export_gpio_pin(gpio_pin) < 0) {
    warnx("export_gpio_pin() failed");
    return -1;
  }
  sleep(2);
  if (set_gpio_direction(gpio_pin) < 0) {
    warnx("set_gpio_direction() failed");
    return -1;
  }
  if (set_gpio_trigger_mode(gpio_pin, gpio_trigger_mode) < 0) {
    warnx("set_gpio_trigger_mode() failed");
    return -1;
  }
  return 0;
}
```
user: What is the c source code of the assembly code below:

```asm
<setup_gpio>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  call   <export_gpio_pin@plt>
  test   %rax,%rax
  js     L0
  mov    $0x2,%edi
  call   <sleep@plt>
  mov    %rbx,%rdi
  call   <set_gpio_direction@plt>
  test   %rax,%rax
  js     L9
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <set_gpio_trigger_mode@plt>
  test   %rax,%rax
  js     L1
  mov    $0x0,%eax
L31:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
L0:
  lea    D27(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L31
L9:
  lea    D22(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L31
L1:
  lea    D16(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L31
```

tool_calls: name: unpack_data
arguments: data_tag: D27
type_infered: string
name: unpack_data
arguments: data_tag: D22
type_infered: string
name: unpack_data
arguments: data_tag: D16
type_infered: string

tool: D27: export_gpio_pin() failed

tool: D22: set_gpio_direction() failed

tool: D16: set_gpio_trigger_mode() failed

assistant: ```c
int setup_gpio(const char *gpio_pin, const char *gpio_trigger_mode) {
  if (export_gpio_pin(gpio_pin) < 0) {
    warnx("export_gpio_pin() failed");
    return -1;
  }
  sleep(2);
  if (set_gpio_direction(gpio_pin) < 0) {
    warnx("set_gpio_direction() failed");
    return -1;
  }
  if (set_gpio_trigger_mode(gpio_pin, gpio_trigger_mode) < 0) {
    warnx("set_gpio_trigger_mode() failed");
    return -1;
  }
  return 0;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<setup_gpio>:
  endbr64
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x8,%rsp
  call   <export_gpio_pin@plt>
  test   %rax,%rax
  js     L4
  mov    $0x2,%edi
  call   <sleep@plt>
  mov    %rbp,%rdi
  call   <set_gpio_direction@plt>
  test   %rax,%rax
  js     L46
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <set_gpio_trigger_mode@plt>
  test   %rax,%rax
  js     L36
  xor    %eax,%eax
L15:
  add    $0x8,%rsp
  pop    %rbp
  pop    %r12
  ret
L4:
  lea    D6(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L15
L46:
  lea    D3(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L15
L36:
  lea    D27(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L15
```

tool_calls: name: parse_data
arguments: label: D6
data_type: string
name: parse_data
arguments: label: D3
data_type: string
name: parse_data
arguments: label: D27
data_type: string

tool: D6: export_gpio_pin() failed

tool: D3: set_gpio_direction() failed

tool: D27: set_gpio_trigger_mode() failed

assistant: ```c
int setup_gpio(const char *gpio_pin, const char *gpio_trigger_mode) {
  if (export_gpio_pin(gpio_pin) < 0) {
    warnx("export_gpio_pin() failed");
    return -1;
  }
  sleep(2);
  if (set_gpio_direction(gpio_pin) < 0) {
    warnx("set_gpio_direction() failed");
    return -1;
  }
  if (set_gpio_trigger_mode(gpio_pin, gpio_trigger_mode) < 0) {
    warnx("set_gpio_trigger_mode() failed");
    return -1;
  }
  return 0;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<setup_gpio>:
  endbr64
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x8,%rsp
  call   <export_gpio_pin@plt>
  test   %rax,%rax
  js     L41
  mov    $0x2,%edi
  call   <sleep@plt>
  mov    %rbp,%rdi
  call   <set_gpio_direction@plt>
  test   %rax,%rax
  js     L22
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <set_gpio_trigger_mode@plt>
  test   %rax,%rax
  js     L31
  xor    %eax,%eax
L0:
  add    $0x8,%rsp
  pop    %rbp
  pop    %r12
  ret
L41:
  lea    D16(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L0
L22:
  lea    D15(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L0
L31:
  lea    D3(%rip),%rdi
  call   <warnx@plt>
  mov    $0xffffffff,%eax
  jmp    L0
```

tool_calls: name: unpack_data
arguments: data_tag: D16
type_infered: string
name: unpack_data
arguments: data_tag: D15
type_infered: string
name: unpack_data
arguments: data_tag: D3
type_infered: string

tool: D16: export_gpio_pin() failed

tool: D15: set_gpio_direction() failed

tool: D3: set_gpio_trigger_mode() failed

assistant: ```c
int setup_gpio(const char *gpio_pin, const char *gpio_trigger_mode) {
  if (export_gpio_pin(gpio_pin) < 0) {
    warnx("export_gpio_pin() failed");
    return -1;
  }
  sleep(2);
  if (set_gpio_direction(gpio_pin) < 0) {
    warnx("set_gpio_direction() failed");
    return -1;
  }
  if (set_gpio_trigger_mode(gpio_pin, gpio_trigger_mode) < 0) {
    warnx("set_gpio_trigger_mode() failed");
    return -1;
  }
  return 0;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<RandomFunc>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x18(%rbp),%rax
  movzwl (%rax),%eax
  movzwl %ax,%eax
  shr    $0x3,%rax
  or     $0xbab5,%ax
  mov    %ax,-0xa(%rbp)
  movw   $0x0,-0xc(%rbp)
  nop
  movzwl -0xa(%rbp),%eax
  and    $0x7c57,%ax
  mov    %eax,%edx
  mov    -0x20(%rbp),%rax
  mov    %dx,(%rax)
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L0
  call   <__stack_chk_fail@plt>
L0:
  leave
  ret
```

assistant: ```c
void RandomFunc(unsigned short input[1], unsigned short output[1]) {
  unsigned short state[1];
  unsigned short local1;
  char copy11;
  char copy14;
  {
    state[0UL] = (input[0UL] | 51238316UL) >> (unsigned short)3;
    local1 = 0UL;
    while (local1 < (unsigned short)0) {
      if (state[0UL] > local1) {
        copy11 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy11;
      } else {
        copy14 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy14;
        copy14 = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = copy14;
      }
      if (state[0UL] <= local1) {
        state[local1] |= state[0UL];
      }
      local1 += 2UL;
    }
    output[0UL] = state[0UL] & 638614615UL;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<RandomFunc>:
  endbr64
  movzwl (%rdi),%eax
  shr    $0x3,%rax
  and    $0x7c57,%ax
  or     $0x3815,%ax
  mov    %ax,(%rsi)
  ret
```

assistant: ```c
void RandomFunc(unsigned short input[1], unsigned short output[1]) {
  unsigned short state[1];
  unsigned short local1;
  char copy11;
  char copy14;
  {
    state[0UL] = (input[0UL] | 51238316UL) >> (unsigned short)3;
    local1 = 0UL;
    while (local1 < (unsigned short)0) {
      if (state[0UL] > local1) {
        copy11 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy11;
      } else {
        copy14 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy14;
        copy14 = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = copy14;
      }
      if (state[0UL] <= local1) {
        state[local1] |= state[0UL];
      }
      local1 += 2UL;
    }
    output[0UL] = state[0UL] & 638614615UL;
  }
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<RandomFunc>:
  endbr64
  movzwl (%rdi),%eax
  shr    $0x3,%rax
  and    $0x7c57,%ax
  or     $0x3815,%ax
  mov    %ax,(%rsi)
  ret
```

assistant: ```c
void RandomFunc(unsigned short input[1], unsigned short output[1]) {
  unsigned short state[1];
  unsigned short local1;
  char copy11;
  char copy14;
  {
    state[0UL] = (input[0UL] | 51238316UL) >> (unsigned short)3;
    local1 = 0UL;
    while (local1 < (unsigned short)0) {
      if (state[0UL] > local1) {
        copy11 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy11;
      } else {
        copy14 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy14;
        copy14 = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = copy14;
      }
      if (state[0UL] <= local1) {
        state[local1] |= state[0UL];
      }
      local1 += 2UL;
    }
    output[0UL] = state[0UL] & 638614615UL;
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<RandomFunc>:
  endbr64
  movzwl (%rdi),%eax
  shr    $0x3,%rax
  and    $0x7c57,%ax
  or     $0x3815,%ax
  mov    %ax,(%rsi)
  ret
```

assistant: ```c
void RandomFunc(unsigned short input[1], unsigned short output[1]) {
  unsigned short state[1];
  unsigned short local1;
  char copy11;
  char copy14;
  {
    state[0UL] = (input[0UL] | 51238316UL) >> (unsigned short)3;
    local1 = 0UL;
    while (local1 < (unsigned short)0) {
      if (state[0UL] > local1) {
        copy11 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy11;
      } else {
        copy14 = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = copy14;
        copy14 = *((char *)(&state[local1]) + 0);
        *((char *)(&state[local1]) + 0) = *((char *)(&state[local1]) + 1);
        *((char *)(&state[local1]) + 1) = copy14;
      }
      if (state[0UL] <= local1) {
        state[local1] |= state[0UL];
      }
      local1 += 2UL;
    }
    output[0UL] = state[0UL] & 638614615UL;
  }
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<option_alloc>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %esi,%r12d
  mov    %edx,%ebp
  mov    %ecx,%r13d
  lea    -0x4(%rdx),%eax
  test   $0xfffffffb,%eax
  je     L45
  lea    -0x1(%rdx),%eax
  mov    $0x0,%r14d
  cmp    $0x1,%eax
  ja     L23
L45:
  mov    $0x0,%r14d
  cmp    $0x7,%r13d
  ja     L23
  mov    (%rbx),%r14
  mov    $0x0,%edi
  call   <CMSG_LEN@plt>
  sub    %eax,%r14d
  sete   %dil
  movzbl %dil,%edi
  mov    $0x0,%esi
  call   <__builtin_expect@plt>
  test   %rax,%rax
  je     L3
  addq   $0x4,(%rbx)
  mov    $0x4,%r14d
L3:
  lea    -0x1(%rbp),%eax
  and    %eax,%r14d
  sub    %r14d,%ebp
  and    %eax,%ebp
  lea    0x0(%rbp,%r13,1),%esi
  mov    %rbx,%rdi
  call   <add_pad@plt>
  mov    %rbx,%rdi
  call   <CMSG_DATA@plt>
  mov    %rax,%rbp
  mov    (%rbx),%r15
  mov    $0x0,%edi
  call   <CMSG_LEN@plt>
  mov    %rax,%r13
  movslq %r12d,%r12
  add    (%rbx),%r12
  mov    %r12,(%rbx)
  mov    $0x0,%edi
  call   <CMSG_LEN@plt>
  mov    %eax,%esi
  sub    %r12d,%esi
  and    $0x7,%esi
  mov    %rbx,%rdi
  call   <add_pad@plt>
  mov    (%rbx),%r12
  mov    $0x0,%edi
  call   <CMSG_LEN@plt>
  sub    %rax,%r12
  test   $0x7,%r12b
  sete   %dil
  movzbl %dil,%edi
  call   <assert@plt>
  mov    (%rbx),%r12
  mov    $0x0,%edi
  call   <CMSG_LEN@plt>
  mov    %rax,%rdx
  mov    %r12,%rax
  sub    %rdx,%rax
  lea    0x7(%rax),%r12
  cmovns %rax,%r12
  sar    $0x3,%r12
  sub    $0x1,%r12d
  mov    $0x0,%r14d
  cmp    $0xff,%r12d
  jg     L23
  add    %r15,%rbp
  mov    %rbp,%r14
  sub    %r13,%r14
  mov    %rbx,%rdi
  call   <CMSG_DATA@plt>
  mov    %r12d,(%rax)
L23:
  mov    %r14,%rax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
uint8_t *option_alloc(struct cmsghdr *cmsg, int datalen, int multx, int plusy) {
  if ((multx != 1 && multx != 2 && multx != 4 && multx != 8) || !(plusy >= 0 && plusy <= 7))
    return NULL;
  int dsize = cmsg->cmsg_len - CMSG_LEN(0);
  if (__builtin_expect(dsize == 0, 0)) {
    cmsg->cmsg_len += sizeof(struct ip6_ext);
    dsize = sizeof(struct ip6_ext);
  }
  add_pad(cmsg, ((multx - (dsize & (multx - 1))) & (multx - 1)) + plusy);
  uint8_t *result = CMSG_DATA(cmsg) + cmsg->cmsg_len - CMSG_LEN(0);
  cmsg->cmsg_len += datalen;
  dsize = cmsg->cmsg_len - CMSG_LEN(0);
  add_pad(cmsg, (8 - (dsize & (8 - 1))) & (8 - 1));
  assert(((cmsg->cmsg_len - CMSG_LEN(0)) % 8) == 0);
  int len8b = (cmsg->cmsg_len - CMSG_LEN(0)) / 8 - 1;
  if (len8b >= 256)
    return NULL;
  struct ip6_ext *ie = (void *)CMSG_DATA(cmsg);
  ie->ip6e_len = len8b;
  return result;
}
```
user: Translate the below assembly code into C programming language:

```asm
<option_alloc>:
  endbr64
  push   %r15
  lea    -0x4(%rdx),%eax
  push   %r14
  mov    %ecx,%r14d
  push   %r13
  push   %r12
  movslq %esi,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %edx,%ebx
  sub    $0x8,%rsp
  and    $0xfffffffb,%eax
  je     L45
  lea    -0x1(%rdx),%eax
  cmp    $0x1,%eax
  ja     L5
L45:
  cmp    $0x7,%r14d
  ja     L5
  xor    %edi,%edi
  mov    0x0(%rbp),%r13
  call   <CMSG_LEN@plt>
  xor    %edi,%edi
  sub    %eax,%r13d
  sete   %dil
  xor    %esi,%esi
  call   <__builtin_expect@plt>
  test   %rax,%rax
  je     L51
  addq   $0x4,0x0(%rbp)
  mov    $0x4,%r13d
L51:
  lea    -0x1(%rbx),%eax
  mov    %rbp,%rdi
  and    %eax,%r13d
  sub    %r13d,%ebx
  and    %eax,%ebx
  lea    (%rbx,%r14,1),%esi
  call   <add_pad@plt>
  mov    %rbp,%rdi
  call   <CMSG_DATA@plt>
  xor    %edi,%edi
  mov    0x0(%rbp),%r15
  mov    %rax,%r13
  call   <CMSG_LEN@plt>
  add    0x0(%rbp),%r12
  xor    %edi,%edi
  mov    %r12,0x0(%rbp)
  mov    %rax,%r14
  call   <CMSG_LEN@plt>
  mov    %rbp,%rdi
  mov    %eax,%esi
  sub    %r12d,%esi
  and    $0x7,%esi
  call   <add_pad@plt>
  xor    %edi,%edi
  mov    0x0(%rbp),%rbx
  call   <CMSG_LEN@plt>
  xor    %edi,%edi
  sub    %rax,%rbx
  and    $0x7,%ebx
  sete   %dil
  call   <assert@plt>
  mov    0x0(%rbp),%rbx
  xor    %edi,%edi
  call   <CMSG_LEN@plt>
  mov    %rax,%r8
  mov    %rbx,%rax
  sub    %r8,%rax
  lea    0x7(%rax),%rbx
  cmovns %rax,%rbx
  sar    $0x3,%rbx
  sub    $0x1,%ebx
  cmp    $0xff,%ebx
  jg     L5
  mov    %rbp,%rdi
  add    %r15,%r13
  call   <CMSG_DATA@plt>
  sub    %r14,%r13
  mov    %ebx,(%rax)
  jmp    L57
  xchg   %ax,%ax
L5:
  xor    %r13d,%r13d
L57:
  add    $0x8,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
uint8_t *option_alloc(struct cmsghdr *cmsg, int datalen, int multx, int plusy) {
  if ((multx != 1 && multx != 2 && multx != 4 && multx != 8) || !(plusy >= 0 && plusy <= 7))
    return NULL;
  int dsize = cmsg->cmsg_len - CMSG_LEN(0);
  if (__builtin_expect(dsize == 0, 0)) {
    cmsg->cmsg_len += sizeof(struct ip6_ext);
    dsize = sizeof(struct ip6_ext);
  }
  add_pad(cmsg, ((multx - (dsize & (multx - 1))) & (multx - 1)) + plusy);
  uint8_t *result = CMSG_DATA(cmsg) + cmsg->cmsg_len - CMSG_LEN(0);
  cmsg->cmsg_len += datalen;
  dsize = cmsg->cmsg_len - CMSG_LEN(0);
  add_pad(cmsg, (8 - (dsize & (8 - 1))) & (8 - 1));
  assert(((cmsg->cmsg_len - CMSG_LEN(0)) % 8) == 0);
  int len8b = (cmsg->cmsg_len - CMSG_LEN(0)) / 8 - 1;
  if (len8b >= 256)
    return NULL;
  struct ip6_ext *ie = (void *)CMSG_DATA(cmsg);
  ie->ip6e_len = len8b;
  return result;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<option_alloc>:
  endbr64
  push   %r15
  lea    -0x4(%rdx),%eax
  push   %r14
  mov    %ecx,%r14d
  push   %r13
  push   %r12
  movslq %esi,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %edx,%ebx
  sub    $0x8,%rsp
  and    $0xfffffffb,%eax
  je     L49
  lea    -0x1(%rdx),%eax
  cmp    $0x1,%eax
  ja     L18
L49:
  cmp    $0x7,%r14d
  ja     L18
  xor    %edi,%edi
  mov    0x0(%rbp),%r13
  call   <CMSG_LEN@plt>
  xor    %edi,%edi
  sub    %eax,%r13d
  sete   %dil
  xor    %esi,%esi
  call   <__builtin_expect@plt>
  test   %rax,%rax
  je     L17
  addq   $0x4,0x0(%rbp)
  mov    $0x4,%r13d
L17:
  lea    -0x1(%rbx),%eax
  mov    %rbp,%rdi
  and    %eax,%r13d
  sub    %r13d,%ebx
  and    %eax,%ebx
  lea    (%rbx,%r14,1),%esi
  call   <add_pad@plt>
  mov    %rbp,%rdi
  call   <CMSG_DATA@plt>
  xor    %edi,%edi
  mov    0x0(%rbp),%r15
  mov    %rax,%r13
  call   <CMSG_LEN@plt>
  add    0x0(%rbp),%r12
  xor    %edi,%edi
  mov    %r12,0x0(%rbp)
  mov    %rax,%r14
  call   <CMSG_LEN@plt>
  mov    %rbp,%rdi
  mov    %eax,%esi
  sub    %r12d,%esi
  and    $0x7,%esi
  call   <add_pad@plt>
  xor    %edi,%edi
  mov    0x0(%rbp),%rbx
  call   <CMSG_LEN@plt>
  xor    %edi,%edi
  sub    %rax,%rbx
  and    $0x7,%ebx
  sete   %dil
  call   <assert@plt>
  mov    0x0(%rbp),%rbx
  xor    %edi,%edi
  call   <CMSG_LEN@plt>
  mov    %rax,%r8
  mov    %rbx,%rax
  sub    %r8,%rax
  lea    0x7(%rax),%rbx
  cmovns %rax,%rbx
  sar    $0x3,%rbx
  sub    $0x1,%ebx
  cmp    $0xff,%ebx
  jg     L18
  mov    %rbp,%rdi
  add    %r15,%r13
  call   <CMSG_DATA@plt>
  sub    %r14,%r13
  mov    %ebx,(%rax)
  jmp    L42
  xchg   %ax,%ax
L18:
  xor    %r13d,%r13d
L42:
  add    $0x8,%rsp
  mov    %r13,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
uint8_t *option_alloc(struct cmsghdr *cmsg, int datalen, int multx, int plusy) {
  if ((multx != 1 && multx != 2 && multx != 4 && multx != 8) || !(plusy >= 0 && plusy <= 7))
    return NULL;
  int dsize = cmsg->cmsg_len - CMSG_LEN(0);
  if (__builtin_expect(dsize == 0, 0)) {
    cmsg->cmsg_len += sizeof(struct ip6_ext);
    dsize = sizeof(struct ip6_ext);
  }
  add_pad(cmsg, ((multx - (dsize & (multx - 1))) & (multx - 1)) + plusy);
  uint8_t *result = CMSG_DATA(cmsg) + cmsg->cmsg_len - CMSG_LEN(0);
  cmsg->cmsg_len += datalen;
  dsize = cmsg->cmsg_len - CMSG_LEN(0);
  add_pad(cmsg, (8 - (dsize & (8 - 1))) & (8 - 1));
  assert(((cmsg->cmsg_len - CMSG_LEN(0)) % 8) == 0);
  int len8b = (cmsg->cmsg_len - CMSG_LEN(0)) / 8 - 1;
  if (len8b >= 256)
    return NULL;
  struct ip6_ext *ie = (void *)CMSG_DATA(cmsg);
  ie->ip6e_len = len8b;
  return result;
}
```