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

```asm
<main>:
  endbr64
  lea    D6(%rip),%rcx
  lea    0x5f5e100(%rcx),%rdx
  add    $0x5f62f20,%rcx
L15:
  lea    -0x5f5e100(%rdx),%rax
L17:
  addl   $0x1,(%rax)
  add    $0x4e20,%rax
  cmp    %rdx,%rax
  jne    L17
  lea    0x4(%rax),%rdx
  cmp    %rcx,%rdx
  jne    L15
  xor    %eax,%eax
  ret
```

assistant: ```c
int main() {
  static int x[5000][5000];
  for (int i = 0; i < 5000; i++) {
    for (int j = 0; j < 5000; j++) {
      x[j][i]++;
    }
  }
  return 0;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<main>:
  endbr64
  lea    D12(%rip),%rdx
  movdqa D11(%rip),%xmm1
  lea    0x5f5e100(%rdx),%rcx
L17:
  xor    %eax,%eax
  nopl   0x0(%rax)
L6:
  movdqa (%rdx,%rax,1),%xmm0
  paddd  %xmm1,%xmm0
  movaps %xmm0,(%rdx,%rax,1)
  add    $0x10,%rax
  cmp    $0x4e20,%rax
  jne    L6
  add    $0x4e20,%rdx
  cmp    %rcx,%rdx
  jne    L17
  xor    %eax,%eax
  ret
```

tool_calls: name: parse_data
arguments: tag: D11
data_type: byte[16]

tool: {"D11": [0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00]}

assistant: ```c
int main() {
  static int x[5000][5000];
  for (int i = 0; i < 5000; i++) {
    for (int j = 0; j < 5000; j++) {
      x[j][i]++;
    }
  }
  return 0;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<freePid>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  mov    %rdx,-0x18(%rbp)
  mov    -0x8(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0xffffffff,%eax
  je     L6
  mov    -0x8(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,%edi
  call   <close@plt>
  mov    -0x8(%rbp),%rax
  movl   $0xffffffff,(%rax)
L6:
  mov    -0x10(%rbp),%rax
  mov    (%rax),%eax
  test   %eax,%eax
  js     L5
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <unlink@plt>
  mov    -0x10(%rbp),%rax
  movl   $0xffffffff,(%rax)
L5:
  nop
  leave
  ret
```

assistant: ```c
void freePid(int *pid_file, int *pid, const char *pid_path) {
  if (*pid_file != -1) {
    close(*pid_file);
    *pid_file = -1;
  }
  if (*pid >= 0) {
    unlink(pid_path);
    *pid = -1;
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<freePid>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %rdx,%r12
  mov    (%rdi),%edi
  cmp    $0xffffffff,%edi
  jne    L29
L28:
  cmpl   $0x0,0x0(%rbp)
  jns    L22
L31:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L29:
  call   <close@plt>
  movl   $0xffffffff,(%rbx)
  jmp    L28
L22:
  mov    %r12,%rdi
  call   <unlink@plt>
  movl   $0xffffffff,0x0(%rbp)
  jmp    L31
```

assistant: ```c
void freePid(int *pid_file, int *pid, const char *pid_path) {
  if (*pid_file != -1) {
    close(*pid_file);
    *pid_file = -1;
  }
  if (*pid >= 0) {
    unlink(pid_path);
    *pid = -1;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<freePid>:
  endbr64
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    (%rdi),%edi
  cmp    $0xffffffff,%edi
  je     L6
  call   <close@plt>
  movl   $0xffffffff,(%rbx)
L6:
  mov    0x0(%rbp),%eax
  test   %eax,%eax
  js     L14
  mov    %r12,%rdi
  call   <unlink@plt>
  movl   $0xffffffff,0x0(%rbp)
L14:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
void freePid(int *pid_file, int *pid, const char *pid_path) {
  if (*pid_file != -1) {
    close(*pid_file);
    *pid_file = -1;
  }
  if (*pid >= 0) {
    unlink(pid_path);
    *pid = -1;
  }
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<freePid>:
  endbr64
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    (%rdi),%edi
  cmp    $0xffffffff,%edi
  je     L13
  call   <close@plt>
  movl   $0xffffffff,(%rbx)
L13:
  mov    0x0(%rbp),%eax
  test   %eax,%eax
  js     L4
  mov    %r12,%rdi
  call   <unlink@plt>
  movl   $0xffffffff,0x0(%rbp)
L4:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
void freePid(int *pid_file, int *pid, const char *pid_path) {
  if (*pid_file != -1) {
    close(*pid_file);
    *pid_file = -1;
  }
  if (*pid >= 0) {
    unlink(pid_path);
    *pid = -1;
  }
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<read_tsc>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  rdtsc
  mov    %eax,-0x10(%rbp)
  mov    %edx,-0xc(%rbp)
  mov    -0x10(%rbp),%edx
  mov    -0xc(%rbp),%eax
  shl    $0x20,%rax
  or     %rdx,%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
unsigned long long read_tsc() {
  unsigned int l, h;
  unsigned long long result;
  asm volatile("rdtsc  \n" : "=a"(l), "=d"(h));
  result = (unsigned long long)l | ((unsigned long long)h << 32);
  return result;
}
```
user: What is the c source code of the assembly code below:

```asm
<read_tsc>:
  endbr64
  rdtsc
  shl    $0x20,%rdx
  mov    %eax,%eax
  or     %rdx,%rax
  ret
```

assistant: ```c
unsigned long long read_tsc() {
  unsigned int l, h;
  unsigned long long result;
  asm volatile("rdtsc  \n" : "=a"(l), "=d"(h));
  result = (unsigned long long)l | ((unsigned long long)h << 32);
  return result;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<read_tsc>:
  endbr64
  rdtsc
  shl    $0x20,%rdx
  mov    %eax,%eax
  or     %rdx,%rax
  ret
```

assistant: ```c
unsigned long long read_tsc() {
  unsigned int l, h;
  unsigned long long result;
  asm volatile("rdtsc  \n" : "=a"(l), "=d"(h));
  result = (unsigned long long)l | ((unsigned long long)h << 32);
  return result;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<read_tsc>:
  endbr64
  rdtsc
  shl    $0x20,%rdx
  mov    %eax,%eax
  or     %rdx,%rax
  ret
```

assistant: ```c
unsigned long long read_tsc() {
  unsigned int l, h;
  unsigned long long result;
  asm volatile("rdtsc  \n" : "=a"(l), "=d"(h));
  result = (unsigned long long)l | ((unsigned long long)h << 32);
  return result;
}
```
user: Translate the below assembly code into C programming language:

```asm
<sys_initpath>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  lea    D64(%rip),%rax
  mov    %rax,%rdi
  call   <getenv@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x10(%rbp)
  jne    L21
  lea    D27(%rip),%rax
  mov    %rax,-0x18(%rbp)
  lea    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    $0x1,%esi
  lea    D24(%rip),%rax
  mov    %rax,%rdi
  call   <rc_setvar@plt>
  lea    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    $0x1,%esi
  lea    D55(%rip),%rax
  mov    %rax,%rdi
  call   <rc_setvar@plt>
  jmp    L9
L21:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    $0xf,%rax
  mov    %rax,%rdi
  call   <malloc@plt>
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  lea    D50(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    $0x1,%esi
  lea    D24(%rip),%rax
  mov    %rax,%rdi
  call   <rc_setvar@plt>
  mov    -0x18(%rbp),%rax
  mov    -0x10(%rbp),%rdx
  lea    D43(%rip),%rcx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <sprintf@plt>
  lea    -0x18(%rbp),%rax
  mov    %rax,%rdx
  mov    $0x1,%esi
  lea    D55(%rip),%rax
  mov    %rax,%rdi
  call   <rc_setvar@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <free@plt>
L9:
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L18
  call   <__stack_chk_fail@plt>
L18:
  leave
  ret
```

tool_calls: name: retrieve_data
arguments: data_label: D64
data_type: string
name: retrieve_data
arguments: data_label: D27
data_type: string
name: retrieve_data
arguments: data_label: D24
data_type: string
name: retrieve_data
arguments: data_label: D55
data_type: string
name: retrieve_data
arguments: data_label: D50
data_type: string
name: retrieve_data
arguments: data_label: D43
data_type: string

tool: D64: HOME

tool: D27: .

tool: D24: rcpath

tool: D55: savedir

tool: D50: %s/.gnuboy:.

tool: D43: %s/.gnuboy/saves

assistant: ```c
void sys_initpath() {
  char *buf, *home = getenv("HOME");
  if (!home) {
    buf = ".";
    rc_setvar("rcpath", 1, &buf);
    rc_setvar("savedir", 1, &buf);
    return;
  }
  buf = malloc(strlen(home) + strlen(".gnuboy") + 8);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          ":.",
          home);
  rc_setvar("rcpath", 1, &buf);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          "/saves",
          home);
  rc_setvar("savedir", 1, &buf);
  free(buf);
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<sys_initpath>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    D42(%rip),%rdi
  call   <getenv@plt>
  test   %rax,%rax
  je     L12
  mov    %rax,%rbx
  mov    %rax,%rdi
  call   <strlen@plt>
  lea    0xf(%rax),%rdi
  call   <malloc@plt>
  mov    %rax,%rdi
  mov    %rax,(%rsp)
  mov    %rbx,%rdx
  lea    D33(%rip),%rsi
  call   <sprintf@plt>
  mov    %rsp,%rbp
  mov    %rbp,%rdx
  mov    $0x1,%esi
  lea    D40(%rip),%rdi
  call   <rc_setvar@plt>
  mov    %rbx,%rdx
  lea    D64(%rip),%rsi
  mov    (%rsp),%rdi
  call   <sprintf@plt>
  mov    %rbp,%rdx
  mov    $0x1,%esi
  lea    D3(%rip),%rdi
  call   <rc_setvar@plt>
  mov    (%rsp),%rdi
  call   <free@plt>
L14:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L13
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  ret
L12:
  lea    D68(%rip),%rax
  mov    %rax,(%rsp)
  mov    %rsp,%rbx
  mov    %rbx,%rdx
  mov    $0x1,%esi
  lea    D40(%rip),%rdi
  call   <rc_setvar@plt>
  mov    %rbx,%rdx
  mov    $0x1,%esi
  lea    D3(%rip),%rdi
  call   <rc_setvar@plt>
  jmp    L14
L13:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: parse_data
arguments: data_label: D42
type_infered: string
name: parse_data
arguments: data_label: D33
type_infered: string
name: parse_data
arguments: data_label: D40
type_infered: string
name: parse_data
arguments: data_label: D64
type_infered: string
name: parse_data
arguments: data_label: D3
type_infered: string
name: parse_data
arguments: data_label: D68
type_infered: string

tool: D42: HOME

tool: D33: %s/.gnuboy:.

tool: D40: rcpath

tool: D64: %s/.gnuboy/saves

tool: D3: savedir

tool: D68: .

assistant: ```c
void sys_initpath() {
  char *buf, *home = getenv("HOME");
  if (!home) {
    buf = ".";
    rc_setvar("rcpath", 1, &buf);
    rc_setvar("savedir", 1, &buf);
    return;
  }
  buf = malloc(strlen(home) + strlen(".gnuboy") + 8);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          ":.",
          home);
  rc_setvar("rcpath", 1, &buf);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          "/saves",
          home);
  rc_setvar("savedir", 1, &buf);
  free(buf);
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<sys_initpath>:
  endbr64
  push   %r13
  lea    D18(%rip),%rdi
  push   %r12
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  call   <getenv@plt>
  test   %rax,%rax
  je     L2
  mov    %rax,%rdi
  mov    %rax,%r12
  mov    %rsp,%r13
  call   <strlen@plt>
  lea    0xf(%rax),%rdi
  call   <malloc@plt>
  mov    %r12,%rdx
  lea    D37(%rip),%rsi
  mov    %rax,%rdi
  mov    %rax,(%rsp)
  call   <sprintf@plt>
  mov    %r13,%rdx
  mov    $0x1,%esi
  lea    D16(%rip),%rdi
  call   <rc_setvar@plt>
  mov    (%rsp),%rdi
  mov    %r12,%rdx
  lea    D36(%rip),%rsi
  call   <sprintf@plt>
  lea    D38(%rip),%rdi
  mov    %r13,%rdx
  mov    $0x1,%esi
  call   <rc_setvar@plt>
  mov    (%rsp),%rdi
  call   <free@plt>
L26:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  add    $0x18,%rsp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L2:
  mov    %rsp,%r12
  lea    D53(%rip),%rax
  mov    $0x1,%esi
  mov    %r12,%rdx
  lea    D16(%rip),%rdi
  mov    %rax,(%rsp)
  call   <rc_setvar@plt>
  mov    %r12,%rdx
  mov    $0x1,%esi
  lea    D38(%rip),%rdi
  call   <rc_setvar@plt>
  jmp    L26
L5:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D18
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D37
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D16
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D36
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D38
type_infered: string
name: extract_symbolic_data
arguments: data_tag: D53
type_infered: string

tool: D18: HOME

tool: D37: %s/.gnuboy:.

tool: D16: rcpath

tool: D36: %s/.gnuboy/saves

tool: D38: savedir

tool: D53: .

assistant: ```c
void sys_initpath() {
  char *buf, *home = getenv("HOME");
  if (!home) {
    buf = ".";
    rc_setvar("rcpath", 1, &buf);
    rc_setvar("savedir", 1, &buf);
    return;
  }
  buf = malloc(strlen(home) + strlen(".gnuboy") + 8);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          ":.",
          home);
  rc_setvar("rcpath", 1, &buf);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          "/saves",
          home);
  rc_setvar("savedir", 1, &buf);
  free(buf);
}
```
user: Translate the below assembly code into C programming language:

```asm
<sys_initpath>:
  endbr64
  push   %r13
  lea    D26(%rip),%rdi
  push   %r12
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  call   <getenv@plt>
  test   %rax,%rax
  je     L15
  mov    %rax,%rdi
  mov    %rax,%r12
  mov    %rsp,%r13
  call   <strlen@plt>
  lea    0xf(%rax),%rdi
  call   <malloc@plt>
  mov    %r12,%rdx
  lea    D24(%rip),%rsi
  mov    %rax,%rdi
  mov    %rax,(%rsp)
  call   <sprintf@plt>
  mov    %r13,%rdx
  mov    $0x1,%esi
  lea    D48(%rip),%rdi
  call   <rc_setvar@plt>
  mov    (%rsp),%rdi
  mov    %r12,%rdx
  lea    D15(%rip),%rsi
  call   <sprintf@plt>
  lea    D28(%rip),%rdi
  mov    %r13,%rdx
  mov    $0x1,%esi
  call   <rc_setvar@plt>
  mov    (%rsp),%rdi
  call   <free@plt>
L26:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L0
  add    $0x18,%rsp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax,%rax,1)
L15:
  mov    %rsp,%r12
  lea    D64(%rip),%rax
  mov    $0x1,%esi
  mov    %r12,%rdx
  lea    D48(%rip),%rdi
  mov    %rax,(%rsp)
  call   <rc_setvar@plt>
  mov    %r12,%rdx
  mov    $0x1,%esi
  lea    D28(%rip),%rdi
  call   <rc_setvar@plt>
  jmp    L26
L0:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: extract_symbolic_data
arguments: tag: D26
type: string
name: extract_symbolic_data
arguments: tag: D24
type: string
name: extract_symbolic_data
arguments: tag: D48
type: string
name: extract_symbolic_data
arguments: tag: D15
type: string
name: extract_symbolic_data
arguments: tag: D28
type: string
name: extract_symbolic_data
arguments: tag: D64
type: string

tool: D26: HOME

tool: D24: %s/.gnuboy:.

tool: D48: rcpath

tool: D15: %s/.gnuboy/saves

tool: D28: savedir

tool: D64: .

assistant: ```c
void sys_initpath() {
  char *buf, *home = getenv("HOME");
  if (!home) {
    buf = ".";
    rc_setvar("rcpath", 1, &buf);
    rc_setvar("savedir", 1, &buf);
    return;
  }
  buf = malloc(strlen(home) + strlen(".gnuboy") + 8);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          ":.",
          home);
  rc_setvar("rcpath", 1, &buf);
  sprintf(buf,
          "%s/"
          ".gnuboy"
          "/saves",
          home);
  rc_setvar("savedir", 1, &buf);
  free(buf);
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<memcpy>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    -0x48(%rbp),%rdx
  mov    -0x50(%rbp),%rax
  or     %rdx,%rax
  and    $0x7,%eax
  test   %rax,%rax
  je     L7
  mov    -0x50(%rbp),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x30(%rbp)
  jmp    L10
L42:
  mov    -0x38(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x38(%rbp)
  mov    -0x30(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x30(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L10:
  mov    -0x58(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x58(%rbp)
  test   %rax,%rax
  jne    L42
  jmp    L48
L7:
  mov    -0x50(%rbp),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x58(%rbp),%rax
  shr    $0x2,%rax
  mov    %rax,-0x18(%rbp)
  jmp    L74
L53:
  mov    -0x28(%rbp),%rdx
  lea    0x8(%rdx),%rax
  mov    %rax,-0x28(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x8(%rax),%rcx
  mov    %rcx,-0x20(%rbp)
  mov    (%rdx),%rdx
  mov    %rdx,(%rax)
L74:
  mov    -0x18(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  test   %rax,%rax
  jne    L53
  mov    -0x58(%rbp),%rax
  and    $0xfffffffffffffffc,%rax
  mov    %rax,%rdx
  mov    -0x50(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x58(%rbp),%rax
  and    $0xfffffffffffffffc,%rax
  mov    %rax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  mov    -0x58(%rbp),%rax
  and    $0x3,%eax
  mov    %rax,-0x18(%rbp)
  jmp    L20
L2:
  mov    -0x10(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x8(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x8(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L20:
  mov    -0x18(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  test   %rax,%rax
  jne    L2
L48:
  mov    -0x48(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
void *memcpy(void *dest, const void *src, size_t n) {
  if ((sizeof(unsigned long) - 1) & ((unsigned long)dest | (unsigned long)src)) {
    char *cs = (char *)src;
    char *cd = (char *)dest;
    while (n--)
      *cd++ = *cs++;
  } else {
    long *ls = (long *)src;
    long *ld = (long *)dest;
    size_t cnt = n >> 2;
    while (cnt--)
      *ld++ = *ls++;
    char *cs = (char *)(src + (n & ~0x03));
    char *cd = (char *)(dest + (n & ~0x03));
    cnt = n & 0x3;
    while (cnt--)
      *cd++ = *cs++;
  }
  return dest;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<memcpy>:
  endbr64
  mov    %rdi,%rax
  or     %rsi,%rax
  and    $0x7,%eax
  je     L67
  test   %rdx,%rdx
  je     L11
  mov    $0x0,%eax
L14:
  movzbl (%rsi,%rax,1),%ecx
  mov    %cl,(%rdi,%rax,1)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L14
L11:
  mov    %rdi,%rax
  ret
L67:
  mov    %rdx,%r9
  shr    $0x2,%r9
  je     L5
  mov    %rax,%rcx
L0:
  mov    (%rsi,%rcx,8),%r8
  mov    %r8,(%rdi,%rcx,8)
  add    $0x1,%rcx
  cmp    %rcx,%r9
  jne    L0
L5:
  mov    %rdx,%r8
  and    $0xfffffffffffffffc,%r8
  add    %r8,%rsi
  add    %rdi,%r8
  and    $0x3,%edx
  je     L11
L68:
  movzbl (%rsi,%rax,1),%ecx
  mov    %cl,(%r8,%rax,1)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L68
  jmp    L11
```

assistant: ```c
void *memcpy(void *dest, const void *src, size_t n) {
  if ((sizeof(unsigned long) - 1) & ((unsigned long)dest | (unsigned long)src)) {
    char *cs = (char *)src;
    char *cd = (char *)dest;
    while (n--)
      *cd++ = *cs++;
  } else {
    long *ls = (long *)src;
    long *ld = (long *)dest;
    size_t cnt = n >> 2;
    while (cnt--)
      *ld++ = *ls++;
    char *cs = (char *)(src + (n & ~0x03));
    char *cd = (char *)(dest + (n & ~0x03));
    cnt = n & 0x3;
    while (cnt--)
      *cd++ = *cs++;
  }
  return dest;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<memcpy>:
  endbr64
  mov    %rdi,%rcx
  mov    %rdi,%r8
  or     %rsi,%rcx
  and    $0x7,%ecx
  je     L61
  test   %rdx,%rdx
  je     L54
  xor    %eax,%eax
  nopl   0x0(%rax)
L60:
  movzbl (%rsi,%rax,1),%ecx
  mov    %cl,(%r8,%rax,1)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L60
L54:
  mov    %r8,%rax
  ret
  nopl   (%rax)
L61:
  mov    %rdx,%r9
  shr    $0x2,%r9
  je     L56
  xor    %eax,%eax
  nopl   0x0(%rax,%rax,1)
L66:
  mov    (%rsi,%rax,8),%rdi
  mov    %rdi,(%r8,%rax,8)
  add    $0x1,%rax
  cmp    %rax,%r9
  jne    L66
L56:
  mov    %rdx,%rax
  and    $0xfffffffffffffffc,%rax
  add    %rax,%rsi
  add    %r8,%rax
  and    $0x3,%edx
  je     L54
L34:
  movzbl (%rsi,%rcx,1),%edi
  mov    %dil,(%rax,%rcx,1)
  add    $0x1,%rcx
  cmp    %rdx,%rcx
  jne    L34
  jmp    L54
```

assistant: ```c
void *memcpy(void *dest, const void *src, size_t n) {
  if ((sizeof(unsigned long) - 1) & ((unsigned long)dest | (unsigned long)src)) {
    char *cs = (char *)src;
    char *cd = (char *)dest;
    while (n--)
      *cd++ = *cs++;
  } else {
    long *ls = (long *)src;
    long *ld = (long *)dest;
    size_t cnt = n >> 2;
    while (cnt--)
      *ld++ = *ls++;
    char *cs = (char *)(src + (n & ~0x03));
    char *cd = (char *)(dest + (n & ~0x03));
    cnt = n & 0x3;
    while (cnt--)
      *cd++ = *cs++;
  }
  return dest;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<fat_expand_name>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x28(%rbp),%rcx
  mov    -0x38(%rbp),%rax
  mov    $0x8,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x30(%rbp),%rcx
  lea    -0xc(%rbp),%rax
  mov    $0x3,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x38(%rbp),%rax
  add    $0x8,%rax
  movb   $0x0,(%rax)
  movb   $0x0,-0x9(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x20(%rbp)
  jmp    L62
L57:
  addq   $0x1,-0x20(%rbp)
L62:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L78
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L57
L78:
  movzbl -0xc(%rbp),%eax
  test   %al,%al
  je     L38
  movzbl -0xc(%rbp),%eax
  cmp    $0x20,%al
  je     L38
  lea    -0xc(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movb   $0x2e,(%rax)
  jmp    L87
L46:
  mov    -0x18(%rbp),%rdx
  lea    0x1(%rdx),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,-0x20(%rbp)
  movzbl (%rdx),%edx
  mov    %dl,(%rax)
L87:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L38
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x20,%al
  jne    L46
L38:
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
  nop
  mov    -0x8(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L82
  call   <__stack_chk_fail@plt>
L82:
  leave
  ret
```

assistant: ```c
void fat_expand_name(char *name, char *_ext, char *buf) {
  char *p;
  char ext[4];
  strncpy(buf, name, 8);
  strncpy(ext, _ext, 3);
  buf[8] = 0;
  ext[3] = 0;
  p = buf;
  while ((*p != 0) && (*p != ' '))
    p++;
  if ((*ext != 0) && (*ext != ' ')) {
    char *e = ext;
    *p++ = '.';
    while ((*e != 0) && (*e != ' ')) {
      *p++ = *e++;
    }
  }
  *p = 0;
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<fat_expand_name>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,%rbp
  mov    %rdx,%rbx
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  mov    $0x8,%edx
  mov    %rdi,%rsi
  mov    %rbx,%rdi
  call   <strncpy@plt>
  lea    0x4(%rsp),%rdi
  mov    $0x3,%edx
  mov    %rbp,%rsi
  call   <strncpy@plt>
  movb   $0x0,0x8(%rbx)
  movb   $0x0,0x7(%rsp)
  testb  $0xdf,(%rbx)
  je     L10
L30:
  add    $0x1,%rbx
  testb  $0xdf,(%rbx)
  jne    L30
L10:
  movzbl 0x4(%rsp),%eax
  test   $0xdf,%al
  je     L9
  movb   $0x2e,(%rbx)
  lea    0x1(%rbx),%rbx
  lea    0x4(%rsp),%rdx
L39:
  add    $0x1,%rdx
  add    $0x1,%rbx
  mov    %al,-0x1(%rbx)
  movzbl (%rdx),%eax
  test   $0xdf,%al
  jne    L39
L9:
  movb   $0x0,(%rbx)
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L14
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  ret
L14:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
void fat_expand_name(char *name, char *_ext, char *buf) {
  char *p;
  char ext[4];
  strncpy(buf, name, 8);
  strncpy(ext, _ext, 3);
  buf[8] = 0;
  ext[3] = 0;
  p = buf;
  while ((*p != 0) && (*p != ' '))
    p++;
  if ((*ext != 0) && (*ext != ' ')) {
    char *e = ext;
    *p++ = '.';
    while ((*e != 0) && (*e != ' ')) {
      *p++ = *e++;
    }
  }
  *p = 0;
}
```