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

```asm
<reverse>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  call   <strlen@plt>
  cltq
  lea    -0x1(%rbx,%rax,1),%rax
  cmp    %rax,%rbx
  jae    L3
  nopl   0x0(%rax)
L14:
  movzbl (%rax),%edx
  movzbl (%rbx),%ecx
  sub    $0x1,%rax
  add    $0x1,%rbx
  mov    %cl,0x1(%rax)
  mov    %dl,-0x1(%rbx)
  cmp    %rbx,%rax
  ja     L14
L3:
  pop    %rbx
  ret
```

assistant: ```c
void reverse(register char *buf) {
  register char *cp = buf + strlen(buf) - 1;
  register char tmp;
  while (buf < cp) {
    tmp = *cp;
    *cp-- = *buf;
    *buf++ = tmp;
  }
}
```
user: What is the c source code of the assembly code below?

```asm
<v4l_format_s_height>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    -0x8(%rbp),%rax
  mov    (%rax),%eax
  add    $0xffffff80,%eax
  cmp    $0x5,%eax
  ja     L17
  mov    %eax,%eax
  lea    0x0(,%rax,4),%rdx
  lea    D10(%rip),%rax
  mov    (%rdx,%rax,1),%eax
  cltq
  lea    D10(%rip),%rdx
  add    %rdx,%rax
  notrack jmp *%rax
  mov    -0x8(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,0x18(%rax)
  jmp    L17
  mov    -0x8(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,0x10(%rax)
  jmp    L17
  mov    -0x8(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  mov    %rdx,0x8(%rax)
  nop
L17:
  nop
  pop    %rbp
  ret
```

assistant: ```c
void v4l_format_s_height(struct v4l2_format *fmt, __u32 height) {
  switch (fmt->type) {
  case V4L2_BUF_TYPE_VIDEO_CAPTURE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT:
    fmt->fmt.pix.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
    fmt->fmt.pix_mp.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_OVERLAY:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
    fmt->fmt.win.w.height = height;
    break;
  }
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<v4l_format_s_height>:
  endbr64
  mov    (%rdi),%eax
  add    $0xffffff80,%eax
  cmp    $0x5,%eax
  ja     L9
  mov    %eax,%eax
  lea    D1(%rip),%rdx
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  mov    %rsi,0x18(%rdi)
  ret
  mov    %rsi,0x10(%rdi)
  ret
  mov    %rsi,0x8(%rdi)
L9:
  ret
```

assistant: ```c
void v4l_format_s_height(struct v4l2_format *fmt, __u32 height) {
  switch (fmt->type) {
  case V4L2_BUF_TYPE_VIDEO_CAPTURE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT:
    fmt->fmt.pix.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
    fmt->fmt.pix_mp.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_OVERLAY:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
    fmt->fmt.win.w.height = height;
    break;
  }
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<v4l_format_s_height>:
  endbr64
  mov    (%rdi),%eax
  add    $0xffffff80,%eax
  cmp    $0x5,%eax
  ja     L3
  lea    D0(%rip),%rdx
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  nop
  mov    %rsi,0x8(%rdi)
L3:
  ret
  nopl   (%rax)
  mov    %rsi,0x10(%rdi)
  ret
  nopl   (%rax)
  mov    %rsi,0x18(%rdi)
  ret
```

assistant: ```c
void v4l_format_s_height(struct v4l2_format *fmt, __u32 height) {
  switch (fmt->type) {
  case V4L2_BUF_TYPE_VIDEO_CAPTURE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT:
    fmt->fmt.pix.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
    fmt->fmt.pix_mp.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_OVERLAY:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
    fmt->fmt.win.w.height = height;
    break;
  }
}
```
user: What is the c source code of the assembly code below:

```asm
<v4l_format_s_height>:
  endbr64
  mov    (%rdi),%eax
  add    $0xffffff80,%eax
  cmp    $0x5,%eax
  ja     L0
  lea    D7(%rip),%rdx
  movslq (%rdx,%rax,4),%rax
  add    %rdx,%rax
  notrack jmp *%rax
  nop
  mov    %rsi,0x8(%rdi)
L0:
  ret
  nopl   (%rax)
  mov    %rsi,0x10(%rdi)
  ret
  nopl   (%rax)
  mov    %rsi,0x18(%rdi)
  ret
```

assistant: ```c
void v4l_format_s_height(struct v4l2_format *fmt, __u32 height) {
  switch (fmt->type) {
  case V4L2_BUF_TYPE_VIDEO_CAPTURE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT:
    fmt->fmt.pix.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
    fmt->fmt.pix_mp.height = height;
    break;
  case V4L2_BUF_TYPE_VIDEO_OVERLAY:
  case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
    fmt->fmt.win.w.height = height;
    break;
  }
}
```
user: 这段汇编代码用C语言表示是什么样的?

```asm
<trap>:
  endbr64
  mov    %esi,%eax
  mov    $0x0,%esi
  cmp    $0x1,%eax
  jle    L60
  mov    (%rdi),%r8d
  mov    %eax,%r10d
  mov    %r8d,%esi
  mov    $0x1,%edx
  mov    $0x0,%r9d
  jmp    L106
L149:
  add    $0x1,%rdx
  cmp    %r10,%rdx
  je     L111
L106:
  mov    (%rdi,%rdx,4),%ecx
  cmp    %esi,%ecx
  jle    L149
  mov    %edx,%r9d
  mov    %ecx,%esi
  jmp    L149
L111:
  cmp    $0x1,%r9d
  jle    L93
  lea    0x4(%rdi),%rdx
  lea    -0x2(%r9),%ecx
  lea    0x8(%rdi,%rcx,4),%r10
  mov    $0x0,%esi
  jmp    L21
L56:
  mov    %ecx,%r8d
L121:
  add    $0x4,%rdx
  cmp    %r10,%rdx
  je     L96
L21:
  mov    (%rdx),%ecx
  cmp    %r8d,%ecx
  jg     L56
  mov    %r8d,%r11d
  sub    %ecx,%r11d
  add    %r11d,%esi
  jmp    L121
L93:
  mov    $0x0,%esi
L96:
  movslq %eax,%rdx
  mov    -0x4(%rdi,%rdx,4),%ecx
  sub    $0x2,%eax
  cmp    %eax,%r9d
  jge    L60
  cltq
  jmp    L65
L147:
  mov    %edx,%ecx
L57:
  sub    $0x1,%rax
  cmp    %eax,%r9d
  jge    L60
L65:
  mov    (%rdi,%rax,4),%edx
  cmp    %ecx,%edx
  jg     L147
  mov    %ecx,%r8d
  sub    %edx,%r8d
  add    %r8d,%esi
  jmp    L57
L60:
  mov    %esi,%eax
  ret
```

assistant: ```c
int trap(int *height, int heightSize) {
  if (heightSize < 2)
    return 0;
  int i, heightest, pos, water;
  heightest = height[0];
  pos = 0;
  for (i = 1; i < heightSize; ++i) {
    if (heightest < height[i]) {
      heightest = height[i];
      pos = i;
    }
  }
  water = 0;
  heightest = height[0];
  for (i = 1; i < pos; ++i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  heightest = height[heightSize - 1];
  for (i = heightSize - 2; i > pos; --i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  return water;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<trap>:
  endbr64
  xor    %r8d,%r8d
  cmp    $0x1,%esi
  jle    L98
  mov    %rdi,%rcx
  mov    (%rdi),%edi
  movslq %esi,%r10
  mov    $0x1,%eax
  xor    %r9d,%r9d
  mov    %edi,%r8d
  nopl   0x0(%rax,%rax,1)
L165:
  mov    (%rcx,%rax,4),%edx
  cmp    %r8d,%edx
  jle    L138
  mov    %eax,%r9d
  mov    %edx,%r8d
L138:
  add    $0x1,%rax
  cmp    %r10,%rax
  jne    L165
  cmp    $0x1,%r9d
  jle    L41
  lea    -0x2(%r9),%edx
  lea    0x4(%rcx),%rax
  xor    %r8d,%r8d
  lea    0x8(%rcx,%rdx,4),%r11
L166:
  mov    (%rax),%edx
  cmp    %edi,%edx
  jle    L153
  add    $0x4,%rax
  mov    %edx,%edi
  cmp    %r11,%rax
  jne    L166
L49:
  sub    $0x2,%esi
  mov    -0x4(%rcx,%r10,4),%edi
  cmp    %esi,%r9d
  jge    L98
  movslq %esi,%rax
  jmp    L15
  nopl   0x0(%rax)
L84:
  mov    %edi,%esi
  sub    $0x1,%rax
  sub    %edx,%esi
  add    %esi,%r8d
  cmp    %eax,%r9d
  jge    L98
L15:
  mov    (%rcx,%rax,4),%edx
  cmp    %edi,%edx
  jle    L84
  sub    $0x1,%rax
  mov    %edx,%edi
  cmp    %eax,%r9d
  jl     L15
L98:
  mov    %r8d,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
L153:
  push   %rbx
L2:
  mov    %edi,%ebx
  add    $0x4,%rax
  sub    %edx,%ebx
  add    %ebx,%r8d
  cmp    %r11,%rax
  je     L76
L187:
  mov    (%rax),%edx
  cmp    %edi,%edx
  jle    L2
  add    $0x4,%rax
  mov    %edx,%edi
  cmp    %r11,%rax
  jne    L187
L76:
  sub    $0x2,%esi
  mov    -0x4(%rcx,%r10,4),%edi
  cmp    %esi,%r9d
  jge    L113
  movslq %esi,%rax
  jmp    L108
  nopl   0x0(%rax)
L14:
  mov    %edi,%esi
  sub    $0x1,%rax
  sub    %edx,%esi
  add    %esi,%r8d
  cmp    %eax,%r9d
  jge    L113
L108:
  mov    (%rcx,%rax,4),%edx
  cmp    %edi,%edx
  jle    L14
  sub    $0x1,%rax
  mov    %edx,%edi
  cmp    %eax,%r9d
  jl     L108
L113:
  mov    %r8d,%eax
  pop    %rbx
  ret
  nop
L41:
  xor    %r8d,%r8d
  jmp    L49
```

assistant: ```c
int trap(int *height, int heightSize) {
  if (heightSize < 2)
    return 0;
  int i, heightest, pos, water;
  heightest = height[0];
  pos = 0;
  for (i = 1; i < heightSize; ++i) {
    if (heightest < height[i]) {
      heightest = height[i];
      pos = i;
    }
  }
  water = 0;
  heightest = height[0];
  for (i = 1; i < pos; ++i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  heightest = height[heightSize - 1];
  for (i = heightSize - 2; i > pos; --i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  return water;
}
```
user: What is the c source code of the assembly code below:

```asm
<trap>:
  endbr64
  xor    %r8d,%r8d
  cmp    $0x1,%esi
  jle    L67
  mov    %rdi,%rcx
  mov    (%rdi),%edi
  movslq %esi,%r10
  mov    $0x1,%eax
  xor    %r9d,%r9d
  mov    %edi,%r8d
  nopl   0x0(%rax,%rax,1)
L122:
  mov    (%rcx,%rax,4),%edx
  cmp    %edx,%r8d
  jge    L146
  mov    %eax,%r9d
  mov    %edx,%r8d
L146:
  add    $0x1,%rax
  cmp    %r10,%rax
  jne    L122
  cmp    $0x1,%r9d
  jle    L173
  lea    -0x2(%r9),%edx
  lea    0x4(%rcx),%rax
  xor    %r8d,%r8d
  lea    0x8(%rcx,%rdx,4),%r11
L30:
  mov    (%rax),%edx
  cmp    %edx,%edi
  jge    L191
  add    $0x4,%rax
  mov    %edx,%edi
  cmp    %r11,%rax
  jne    L30
L170:
  sub    $0x2,%esi
  mov    -0x4(%rcx,%r10,4),%edi
  cmp    %r9d,%esi
  jle    L67
  movslq %esi,%rax
  jmp    L132
  nopl   0x0(%rax)
L98:
  mov    %edi,%esi
  sub    $0x1,%rax
  sub    %edx,%esi
  add    %esi,%r8d
  cmp    %eax,%r9d
  jge    L67
L132:
  mov    (%rcx,%rax,4),%edx
  cmp    %edi,%edx
  jle    L98
  sub    $0x1,%rax
  mov    %edx,%edi
  cmp    %eax,%r9d
  jl     L132
L67:
  mov    %r8d,%eax
  ret
  cs nopw 0x0(%rax,%rax,1)
L191:
  push   %rbx
L103:
  mov    %edi,%ebx
  add    $0x4,%rax
  sub    %edx,%ebx
  add    %ebx,%r8d
  cmp    %r11,%rax
  je     L18
L80:
  mov    (%rax),%edx
  cmp    %edx,%edi
  jge    L103
  add    $0x4,%rax
  mov    %edx,%edi
  cmp    %r11,%rax
  jne    L80
L18:
  sub    $0x2,%esi
  mov    -0x4(%rcx,%r10,4),%edi
  cmp    %r9d,%esi
  jle    L136
  movslq %esi,%rax
  jmp    L35
  nopl   0x0(%rax)
L198:
  mov    %edi,%esi
  sub    $0x1,%rax
  sub    %edx,%esi
  add    %esi,%r8d
  cmp    %eax,%r9d
  jge    L136
L35:
  mov    (%rcx,%rax,4),%edx
  cmp    %edi,%edx
  jle    L198
  sub    $0x1,%rax
  mov    %edx,%edi
  cmp    %eax,%r9d
  jl     L35
L136:
  mov    %r8d,%eax
  pop    %rbx
  ret
  nop
L173:
  xor    %r8d,%r8d
  jmp    L170
```

assistant: ```c
int trap(int *height, int heightSize) {
  if (heightSize < 2)
    return 0;
  int i, heightest, pos, water;
  heightest = height[0];
  pos = 0;
  for (i = 1; i < heightSize; ++i) {
    if (heightest < height[i]) {
      heightest = height[i];
      pos = i;
    }
  }
  water = 0;
  heightest = height[0];
  for (i = 1; i < pos; ++i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  heightest = height[heightSize - 1];
  for (i = heightSize - 2; i > pos; --i) {
    if (height[i] > heightest)
      heightest = height[i];
    else
      water += heightest - height[i];
  }
  return water;
}
```
user: What is the c source code of the assembly code below:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %edi,-0x4(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    $0x0,%eax
  call   <test_setPosition@plt>
  mov    $0x0,%eax
  call   <test_loopPosition@plt>
  mov    D5(%rip),%rax
  mov    (%rax),%eax
  leave
  ret
```

assistant: ```c
int main(int argc, char *argv[]) {
  test_setPosition();
  test_loopPosition();
  return EXIT_SUCCESS;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  mov    $0x0,%eax
  call   <test_setPosition@plt>
  mov    $0x0,%eax
  call   <test_loopPosition@plt>
  mov    D8(%rip),%rax
  mov    (%rax),%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char *argv[]) {
  test_setPosition();
  test_loopPosition();
  return EXIT_SUCCESS;
}
```
user: What is the c source code of the assembly code below?

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  xor    %eax,%eax
  call   <test_setPosition@plt>
  xor    %eax,%eax
  call   <test_loopPosition@plt>
  mov    D1(%rip),%rax
  mov    (%rax),%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char *argv[]) {
  test_setPosition();
  test_loopPosition();
  return EXIT_SUCCESS;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  xor    %eax,%eax
  call   <test_setPosition@plt>
  xor    %eax,%eax
  call   <test_loopPosition@plt>
  mov    D0(%rip),%rax
  mov    (%rax),%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char *argv[]) {
  test_setPosition();
  test_loopPosition();
  return EXIT_SUCCESS;
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<do_getch>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x1,-0xc(%rbp)
  mov    D24(%rip),%rax
  mov    (%rax),%eax
  mov    -0xc(%rbp),%edx
  lea    -0xd(%rbp),%rcx
  mov    %rcx,%rsi
  mov    %eax,%edi
  call   <read@plt>
  mov    %eax,-0xc(%rbp)
  mov    D27(%rip),%rax
  mov    (%rax),%edx
  mov    D24(%rip),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <tcflush@plt>
  cmpl   $0x0,-0xc(%rbp)
  jns    L3
  mov    $0xffffffff,%eax
  jmp    L17
L3:
  movzbl -0xd(%rbp),%eax
L17:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L0
  call   <__stack_chk_fail@plt>
L0:
  leave
  ret
```

assistant: ```c
char do_getch(void) {
  char ch;
  int cnt = 1;
  cnt = read(STDIN_FILENO, &ch, cnt);
  tcflush(STDIN_FILENO, TCIFLUSH);
  if (cnt < 0)
    return -1;
  return ch;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<do_getch>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x7(%rsp),%rsi
  mov    D3(%rip),%rbp
  mov    $0x1,%edx
  mov    0x0(%rbp),%edi
  call   <read@plt>
  mov    %eax,%ebx
  mov    D14(%rip),%rax
  mov    (%rax),%esi
  mov    0x0(%rbp),%edi
  call   <tcflush@plt>
  test   %ebx,%ebx
  js     L0
  movzbl 0x7(%rsp),%eax
L1:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L15
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  ret
L0:
  mov    $0xffffffff,%eax
  jmp    L1
L15:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char do_getch(void) {
  char ch;
  int cnt = 1;
  cnt = read(STDIN_FILENO, &ch, cnt);
  tcflush(STDIN_FILENO, TCIFLUSH);
  if (cnt < 0)
    return -1;
  return ch;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<do_getch>:
  endbr64
  push   %rbp
  mov    $0x1,%edx
  push   %rbx
  sub    $0x18,%rsp
  mov    D8(%rip),%rbp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x7(%rsp),%rsi
  mov    0x0(%rbp),%edi
  call   <read@plt>
  mov    0x0(%rbp),%edi
  mov    %eax,%ebx
  mov    D12(%rip),%rax
  mov    (%rax),%esi
  call   <tcflush@plt>
  test   %ebx,%ebx
  js     L0
  movzbl 0x7(%rsp),%eax
L5:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L9
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  ret
L0:
  mov    $0xffffffff,%eax
  jmp    L5
L9:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char do_getch(void) {
  char ch;
  int cnt = 1;
  cnt = read(STDIN_FILENO, &ch, cnt);
  tcflush(STDIN_FILENO, TCIFLUSH);
  if (cnt < 0)
    return -1;
  return ch;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<do_getch>:
  endbr64
  push   %rbp
  mov    $0x1,%edx
  push   %rbx
  sub    $0x18,%rsp
  mov    D8(%rip),%rbp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x7(%rsp),%rsi
  mov    0x0(%rbp),%edi
  call   <read@plt>
  mov    0x0(%rbp),%edi
  mov    %eax,%ebx
  mov    D2(%rip),%rax
  mov    (%rax),%esi
  call   <tcflush@plt>
  test   %ebx,%ebx
  js     L7
  movzbl 0x7(%rsp),%eax
L28:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L9
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  ret
L7:
  mov    $0xffffffff,%eax
  jmp    L28
L9:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
char do_getch(void) {
  char ch;
  int cnt = 1;
  cnt = read(STDIN_FILENO, &ch, cnt);
  tcflush(STDIN_FILENO, TCIFLUSH);
  if (cnt < 0)
    return -1;
  return ch;
}
```
user: What is the c source code of the assembly code below:

```asm
<ipv6_pfx_cmp>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  sar    $0x3,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x24(%rbp),%eax
  and    $0x7,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x20(%rbp),%rax
  mov    (%rax),%rcx
  mov    -0x18(%rbp),%rax
  mov    (%rax),%rax
  mov    -0xc(%rbp),%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <memcmp@plt>
  mov    %eax,-0x4(%rbp)
  cmpl   $0x0,-0x4(%rbp)
  jne    L12
  cmpl   $0x0,-0x8(%rbp)
  jne    L17
L12:
  mov    -0x4(%rbp),%eax
  jmp    L2
L17:
  mov    -0x18(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0xc(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rdx,%rax
  mov    (%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    (%rax),%rcx
  mov    -0xc(%rbp),%eax
  cltq
  shl    $0x2,%rax
  add    %rcx,%rax
  mov    (%rax),%eax
  xor    %eax,%edx
  mov    -0x8(%rbp),%eax
  mov    $0xff00,%esi
  mov    %eax,%ecx
  sar    %cl,%esi
  mov    %esi,%eax
  and    %edx,%eax
L2:
  leave
  ret
```

assistant: ```c
int ipv6_pfx_cmp(const struct in6_addr *p1, const struct in6_addr *p2, int plen) {
  int o = plen >> 3, b = plen & 0x7;
  int res;
  if ((res = memcmp(p1->s6_addr, p2->s6_addr, o)) != 0 || b == 0)
    return res;
  return (p1->s6_addr[o] ^ p2->s6_addr[o]) & (0xff00 >> b);
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<ipv6_pfx_cmp>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%r12
  mov    %rsi,%rbp
  mov    %edx,%ebx
  mov    %edx,%r13d
  sar    $0x3,%r13d
  and    $0x7,%ebx
  mov    %r13d,%edx
  mov    (%rsi),%rsi
  mov    (%rdi),%rdi
  call   <memcmp@plt>
  test   %ebx,%ebx
  je     L2
  test   %eax,%eax
  jne    L2
  movslq %r13d,%r13
  mov    (%r12),%rax
  mov    0x0(%rbp),%rdx
  mov    (%rax,%r13,4),%eax
  xor    (%rdx,%r13,4),%eax
  mov    $0xff00,%edx
  mov    %ebx,%ecx
  sar    %cl,%edx
  and    %edx,%eax
L2:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int ipv6_pfx_cmp(const struct in6_addr *p1, const struct in6_addr *p2, int plen) {
  int o = plen >> 3, b = plen & 0x7;
  int res;
  if ((res = memcmp(p1->s6_addr, p2->s6_addr, o)) != 0 || b == 0)
    return res;
  return (p1->s6_addr[o] ^ p2->s6_addr[o]) & (0xff00 >> b);
}
```
user: Translate the below assembly code into C programming language:

```asm
<ipv6_pfx_cmp>:
  endbr64
  push   %r13
  mov    %edx,%r13d
  push   %r12
  sar    $0x3,%r13d
  mov    %rdi,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %edx,%ebx
  mov    %r13d,%edx
  sub    $0x8,%rsp
  mov    (%rsi),%rsi
  mov    (%rdi),%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  jne    L13
  mov    %ebx,%eax
  and    $0x7,%eax
  je     L13
  mov    (%r12),%rcx
  mov    0x0(%rbp),%rdx
  movslq %r13d,%r13
  mov    (%rcx,%r13,4),%esi
  mov    %eax,%ecx
  xor    (%rdx,%r13,4),%esi
  mov    $0xff00,%edx
  sar    %cl,%edx
  mov    %esi,%eax
  and    %edx,%eax
L13:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int ipv6_pfx_cmp(const struct in6_addr *p1, const struct in6_addr *p2, int plen) {
  int o = plen >> 3, b = plen & 0x7;
  int res;
  if ((res = memcmp(p1->s6_addr, p2->s6_addr, o)) != 0 || b == 0)
    return res;
  return (p1->s6_addr[o] ^ p2->s6_addr[o]) & (0xff00 >> b);
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<ipv6_pfx_cmp>:
  endbr64
  push   %r13
  mov    %edx,%r13d
  push   %r12
  sar    $0x3,%r13d
  mov    %rdi,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %edx,%ebx
  mov    %r13d,%edx
  sub    $0x8,%rsp
  mov    (%rsi),%rsi
  mov    (%rdi),%rdi
  call   <memcmp@plt>
  test   %eax,%eax
  jne    L16
  mov    %ebx,%eax
  and    $0x7,%eax
  je     L16
  mov    (%r12),%rcx
  mov    0x0(%rbp),%rdx
  movslq %r13d,%r13
  mov    (%rcx,%r13,4),%esi
  mov    %eax,%ecx
  xor    (%rdx,%r13,4),%esi
  mov    $0xff00,%edx
  sar    %cl,%edx
  mov    %esi,%eax
  and    %edx,%eax
L16:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
int ipv6_pfx_cmp(const struct in6_addr *p1, const struct in6_addr *p2, int plen) {
  int o = plen >> 3, b = plen & 0x7;
  int res;
  if ((res = memcmp(p1->s6_addr, p2->s6_addr, o)) != 0 || b == 0)
    return res;
  return (p1->s6_addr[o] ^ p2->s6_addr[o]) & (0xff00 >> b);
}
```
user: Translate the below assembly code into C programming language:

```asm
<transitive_closure>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbx
  mov    %rdi,-0x30(%rbp)
  mov    %esi,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  add    $0x1f,%eax
  lea    0x1f(%rax),%edx
  test   %eax,%eax
  cmovs  %edx,%eax
  sar    $0x5,%eax
  mov    %eax,%r12d
  mov    %r12d,%eax
  imul   -0x34(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rdx
  mov    -0x30(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,%r8
  mov    -0x30(%rbp),%r15
  mov    $0x0,%r13d
  mov    -0x30(%rbp),%r14
  jmp    L72
L62:
  mov    %r15,%rsi
  mov    -0x30(%rbp),%rbx
  jmp    L68
L85:
  mov    %rsi,%rax
  mov    (%rax),%edx
  mov    $0x1,%eax
  mov    %r13d,%ecx
  shl    %cl,%eax
  and    %edx,%eax
  test   %eax,%eax
  je     L45
  mov    %r14,%rdi
  movslq %r12d,%rax
  shl    $0x2,%rax
  add    %rbx,%rax
  mov    %rax,%r9
  jmp    L64
L35:
  mov    %rdi,%rax
  lea    0x4(%rax),%rdi
  mov    (%rax),%ecx
  mov    %rbx,%rax
  lea    0x4(%rax),%rbx
  mov    (%rax),%edx
  or     %ecx,%edx
  mov    %edx,(%rax)
L64:
  mov    %r9,%rax
  cmp    %rax,%rbx
  jb     L35
  jmp    L52
L45:
  movslq %r12d,%rax
  shl    $0x2,%rax
  add    %rax,%rbx
L52:
  movslq %r12d,%rax
  shl    $0x2,%rax
  add    %rax,%rsi
L68:
  mov    %r8,%rax
  cmp    %rax,%rbx
  jb     L85
  add    $0x1,%r13d
  cmp    $0x1f,%r13d
  jbe    L1
  mov    $0x0,%r13d
  add    $0x4,%r15
L1:
  movslq %r12d,%rax
  shl    $0x2,%rax
  add    %rax,%r14
L72:
  mov    %r8,%rax
  cmp    %rax,%r14
  jb     L62
  nop
  pop    %rbx
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  pop    %rbp
  ret
```

assistant: ```c
transitive_closure(R, n) unsigned *R;
int n;
{
  register int rowsize;
  register unsigned i;
  register unsigned *rowj;
  register unsigned *rp;
  register unsigned *rend;
  register unsigned *ccol;
  register unsigned *relend;
  register unsigned *cword;
  register unsigned *rowi;
  rowsize = (((n) + (32 - 1)) / 32);
  relend = R + n * rowsize;
  cword = R;
  i = 0;
  rowi = R;
  while (rowi < relend) {
    ccol = cword;
    rowj = R;
    while (rowj < relend) {
      if (*ccol & (1 << i)) {
        rp = rowi;
        rend = rowj + rowsize;
        while (rowj < rend)
          *rowj++ |= *rp++;
      } else {
        rowj += rowsize;
      }
      ccol += rowsize;
    }
    if (++i >= 32) {
      i = 0;
      cword++;
    }
    rowi += rowsize;
  }
}
```