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
<recstr>:
  endbr64
  push   %r13
  mov    $0x4,%edx
  xor    %ecx,%ecx
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %edi,%ebx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rsi
  call   <recv@plt>
  mov    0x4(%rsp),%edi
  call   <ntohl@plt>
  lea    D10(%rip),%rdi
  mov    %eax,%esi
  mov    %eax,0x4(%rsp)
  call   <printf@plt>
  mov    0x4(%rsp),%edi
  call   <malloc@plt>
  mov    0x4(%rsp),%edx
  mov    %rax,%r13
  test   %rax,%rax
  jne    L52
  jmp    L3
  nopl   0x0(%rax)
L55:
  test   %eax,%eax
  je     L67
  mov    0x4(%rsp),%edx
  add    %eax,%r12d
  cmp    %r12d,%edx
  jle    L67
L52:
  sub    %r12d,%edx
  xor    %ecx,%ecx
  xor    %eax,%eax
  mov    %r13,%rsi
  mov    %ebx,%edi
  call   <recv@plt>
  cmp    $0xffffffff,%eax
  jne    L55
  lea    D15(%rip),%rdi
  xor    %r12d,%r12d
  call   <perror@plt>
  mov    %r13,%rdi
  call   <free@plt>
  jmp    L9
  nop
L67:
  mov    %r13,0x0(%rbp)
L9:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L40
  add    $0x18,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L3:
  lea    D4(%rip),%rdi
  call   <perror@plt>
  jmp    L9
L40:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D10
type: string
name: retrieve_data
arguments: tag: D15
type: string
name: retrieve_data
arguments: tag: D4
type: string

tool: D10: recstr received string size: %d


tool: D15: recstr

tool: D4: recstr (malloc)

assistant: ```c
int recstr(int sockfd, char **str) {
  ssize_t numbytes = 0;
  int total = 0, rv = 0, size;
  recv(sockfd, &size, sizeof(size), 0);
  size = ntohl(size);
  printf("recstr received string size: %d\n", size);
  char *s = malloc(size);
  if (!s) {
    perror("recstr (malloc)");
    goto exit;
  }
  do {
    numbytes = recv(sockfd, s, size - total, 0);
    if (numbytes == -1) {
      perror("recstr");
      goto memory_cleanup;
    } else if (numbytes == 0) {
      break;
    }
    total += numbytes;
  } while (total < size);
  rv = total;
  *str = s;
  goto exit;
memory_cleanup:
  free(s);
exit:
  return rv;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<recstr>:
  endbr64
  push   %r13
  mov    $0x4,%edx
  xor    %ecx,%ecx
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %edi,%ebx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  lea    0x4(%rsp),%rsi
  call   <recv@plt>
  mov    0x4(%rsp),%edi
  call   <ntohl@plt>
  lea    D13(%rip),%rdi
  mov    %eax,%esi
  mov    %eax,0x4(%rsp)
  call   <printf@plt>
  mov    0x4(%rsp),%edi
  call   <malloc@plt>
  mov    0x4(%rsp),%edx
  mov    %rax,%r13
  test   %rax,%rax
  jne    L15
  jmp    L3
  nopl   0x0(%rax)
L4:
  test   %eax,%eax
  je     L67
  mov    0x4(%rsp),%edx
  add    %eax,%r12d
  cmp    %r12d,%edx
  jle    L67
L15:
  sub    %r12d,%edx
  xor    %ecx,%ecx
  xor    %eax,%eax
  mov    %r13,%rsi
  mov    %ebx,%edi
  call   <recv@plt>
  cmp    $0xffffffff,%eax
  jne    L4
  lea    D19(%rip),%rdi
  xor    %r12d,%r12d
  call   <perror@plt>
  mov    %r13,%rdi
  call   <free@plt>
  jmp    L56
  nop
L67:
  mov    %r13,0x0(%rbp)
L56:
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L46
  add    $0x18,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopw   0x0(%rax,%rax,1)
L3:
  lea    D11(%rip),%rdi
  call   <perror@plt>
  jmp    L56
L46:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: retrieve_data
arguments: tag: D13
data_type: string
name: retrieve_data
arguments: tag: D19
data_type: string
name: retrieve_data
arguments: tag: D11
data_type: string

tool: D13: recstr received string size: %d


tool: D19: recstr

tool: D11: recstr (malloc)

assistant: ```c
int recstr(int sockfd, char **str) {
  ssize_t numbytes = 0;
  int total = 0, rv = 0, size;
  recv(sockfd, &size, sizeof(size), 0);
  size = ntohl(size);
  printf("recstr received string size: %d\n", size);
  char *s = malloc(size);
  if (!s) {
    perror("recstr (malloc)");
    goto exit;
  }
  do {
    numbytes = recv(sockfd, s, size - total, 0);
    if (numbytes == -1) {
      perror("recstr");
      goto memory_cleanup;
    } else if (numbytes == 0) {
      break;
    }
    total += numbytes;
  } while (total < size);
  rv = total;
  *str = s;
  goto exit;
memory_cleanup:
  free(s);
exit:
  return rv;
}
```
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
  push   %rbp
  mov    %rsp,%rbp
  lea    D30(%rip),%rax
  mov    %rax,%rcx
  mov    $0x140,%edx
  lea    D54(%rip),%rax
  mov    %rax,%rsi
  lea    D21(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <debug_stdout@plt>
  mov    $0x0,%edi
  mov    $0x0,%eax
  call   <test_1@plt>
  mov    $0x2,%edi
  mov    $0x0,%eax
  call   <test_1@plt>
  mov    $0x0,%eax
  call   <tests_errors@plt>
  mov    $0x0,%eax
  call   <tests_0k@plt>
  mov    $0x0,%eax
  call   <test_max@plt>
  mov    $0x0,%eax
  call   <tests_realloc@plt>
  mov    $0x0,%eax
  call   <tests_corr@plt>
  lea    D30(%rip),%rax
  mov    %rax,%rcx
  mov    $0x148,%edx
  lea    D54(%rip),%rax
  mov    %rax,%rsi
  lea    D23(%rip),%rax
  mov    %rax,%rdi
  mov    $0x0,%eax
  call   <debug_stdout@plt>
  mov    $0x0,%eax
  pop    %rbp
  ret
```

tool_calls: name: read_data
arguments: data_tag: D30
type_guessed: string
name: read_data
arguments: data_tag: D54
type_guessed: string
name: read_data
arguments: data_tag: D21
type_guessed: string
name: read_data
arguments: data_tag: D23
type_guessed: string

tool: D30: main

tool: D54: /scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c

tool: D21: main:INIT

tool: D23: main:END

assistant: ```c
int main(void) {
  debug_stdout("main:INIT", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 320, __FUNCTION__);
  test_1(0);
  test_1(2);
  tests_errors();
  tests_0k();
  test_max();
  tests_realloc();
  tests_corr();
  debug_stdout("main:END", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 328, __FUNCTION__);
  return (0);
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<main>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  lea    D28(%rip),%rbp
  mov    %rbp,%rcx
  mov    $0x140,%edx
  lea    D22(%rip),%rbx
  mov    %rbx,%rsi
  lea    D17(%rip),%rdi
  mov    $0x0,%eax
  call   <debug_stdout@plt>
  mov    $0x0,%edi
  mov    $0x0,%eax
  call   <test_1@plt>
  mov    $0x2,%edi
  mov    $0x0,%eax
  call   <test_1@plt>
  mov    $0x0,%eax
  call   <tests_errors@plt>
  mov    $0x0,%eax
  call   <tests_0k@plt>
  mov    $0x0,%eax
  call   <test_max@plt>
  mov    $0x0,%eax
  call   <tests_realloc@plt>
  mov    $0x0,%eax
  call   <tests_corr@plt>
  mov    %rbp,%rcx
  mov    $0x148,%edx
  mov    %rbx,%rsi
  lea    D13(%rip),%rdi
  mov    $0x0,%eax
  call   <debug_stdout@plt>
  mov    $0x0,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

tool_calls: name: unpack_data
arguments: data_label: D28
type: string
name: unpack_data
arguments: data_label: D22
type: string
name: unpack_data
arguments: data_label: D17
type: string
name: unpack_data
arguments: data_label: D13
type: string

tool: D28: main

tool: D22: /scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c

tool: D17: main:INIT

tool: D13: main:END

assistant: ```c
int main(void) {
  debug_stdout("main:INIT", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 320, __FUNCTION__);
  test_1(0);
  test_1(2);
  tests_errors();
  tests_0k();
  test_max();
  tests_realloc();
  tests_corr();
  debug_stdout("main:END", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 328, __FUNCTION__);
  return (0);
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<main>:
  endbr64
  push   %r12
  lea    D0(%rip),%r12
  mov    $0x140,%edx
  xor    %eax,%eax
  push   %rbp
  lea    D27(%rip),%rbp
  mov    %r12,%rcx
  lea    D20(%rip),%rdi
  mov    %rbp,%rsi
  sub    $0x8,%rsp
  call   <debug_stdout@plt>
  xor    %edi,%edi
  xor    %eax,%eax
  call   <test_1@plt>
  mov    $0x2,%edi
  xor    %eax,%eax
  call   <test_1@plt>
  xor    %eax,%eax
  call   <tests_errors@plt>
  xor    %eax,%eax
  call   <tests_0k@plt>
  xor    %eax,%eax
  call   <test_max@plt>
  xor    %eax,%eax
  call   <tests_realloc@plt>
  xor    %eax,%eax
  call   <tests_corr@plt>
  mov    %r12,%rcx
  mov    %rbp,%rsi
  mov    $0x148,%edx
  lea    D29(%rip),%rdi
  xor    %eax,%eax
  call   <debug_stdout@plt>
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: disassemble_data
arguments: data_label: D0
type_infered: string
name: disassemble_data
arguments: data_label: D27
type_infered: string
name: disassemble_data
arguments: data_label: D20
type_infered: string
name: disassemble_data
arguments: data_label: D29
type_infered: string

tool: D0: main

tool: D27: /scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c

tool: D20: main:INIT

tool: D29: main:END

assistant: ```c
int main(void) {
  debug_stdout("main:INIT", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 320, __FUNCTION__);
  test_1(0);
  test_1(2);
  tests_errors();
  tests_0k();
  test_max();
  tests_realloc();
  tests_corr();
  debug_stdout("main:END", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 328, __FUNCTION__);
  return (0);
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<main>:
  endbr64
  push   %r12
  lea    D8(%rip),%r12
  mov    $0x140,%edx
  xor    %eax,%eax
  push   %rbp
  lea    D14(%rip),%rbp
  mov    %r12,%rcx
  lea    D12(%rip),%rdi
  mov    %rbp,%rsi
  sub    $0x8,%rsp
  call   <debug_stdout@plt>
  xor    %edi,%edi
  xor    %eax,%eax
  call   <test_1@plt>
  mov    $0x2,%edi
  xor    %eax,%eax
  call   <test_1@plt>
  xor    %eax,%eax
  call   <tests_errors@plt>
  xor    %eax,%eax
  call   <tests_0k@plt>
  xor    %eax,%eax
  call   <test_max@plt>
  xor    %eax,%eax
  call   <tests_realloc@plt>
  xor    %eax,%eax
  call   <tests_corr@plt>
  mov    %r12,%rcx
  mov    %rbp,%rsi
  mov    $0x148,%edx
  lea    D9(%rip),%rdi
  xor    %eax,%eax
  call   <debug_stdout@plt>
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D8
datatype: string
name: extract_symbolic_data
arguments: data_tag: D14
datatype: string
name: extract_symbolic_data
arguments: data_tag: D12
datatype: string
name: extract_symbolic_data
arguments: data_tag: D9
datatype: string

tool: D8: main

tool: D14: /scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c

tool: D12: main:INIT

tool: D9: main:END

assistant: ```c
int main(void) {
  debug_stdout("main:INIT", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 320, __FUNCTION__);
  test_1(0);
  test_1(2);
  tests_errors();
  tests_0k();
  test_max();
  tests_realloc();
  tests_corr();
  debug_stdout("main:END", "/scratch/repos/new/home/jordi_armengol_estape/c-scraper/outputs/2022-01-22/02-19-57/repos/gmange/malloc/refs/heads/master/test/main_test.c", 328, __FUNCTION__);
  return (0);
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<array_item_remove_with_shift_with_shrink>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x8(%rbp)
  mov    %rsi,-0x10(%rbp)
  movss  %xmm0,-0x14(%rbp)
  mov    -0x10(%rbp),%rdx
  mov    -0x8(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <array_item_remove_with_shift@plt>
  mov    -0x14(%rbp),%edx
  mov    -0x8(%rbp),%rax
  movd   %edx,%xmm0
  mov    %rax,%rdi
  call   <array_shrink_with_ratio@plt>
  nop
  leave
  ret
```

assistant: ```c
void array_item_remove_with_shift_with_shrink(struct array_s *a, unsigned long n, float ratio) {
  array_item_remove_with_shift(a, n);
  array_shrink_with_ratio(a, ratio);
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<array_item_remove_with_shift_with_shrink>:
  endbr64
  push   %rbx
  sub    $0x10,%rsp
  mov    %rdi,%rbx
  movss  %xmm0,0xc(%rsp)
  call   <array_item_remove_with_shift@plt>
  movss  0xc(%rsp),%xmm0
  mov    %rbx,%rdi
  call   <array_shrink_with_ratio@plt>
  add    $0x10,%rsp
  pop    %rbx
  ret
```

assistant: ```c
void array_item_remove_with_shift_with_shrink(struct array_s *a, unsigned long n, float ratio) {
  array_item_remove_with_shift(a, n);
  array_shrink_with_ratio(a, ratio);
}
```
user: What is the c source code of the assembly code below?

```asm
<array_item_remove_with_shift_with_shrink>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x10,%rsp
  movss  %xmm0,0xc(%rsp)
  call   <array_item_remove_with_shift@plt>
  movss  0xc(%rsp),%xmm0
  add    $0x10,%rsp
  mov    %rbp,%rdi
  pop    %rbp
  jmp    1060 <array_shrink_with_ratio@plt>
```

assistant: ```c
void array_item_remove_with_shift_with_shrink(struct array_s *a, unsigned long n, float ratio) {
  array_item_remove_with_shift(a, n);
  array_shrink_with_ratio(a, ratio);
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<array_item_remove_with_shift_with_shrink>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  sub    $0x10,%rsp
  movss  %xmm0,0xc(%rsp)
  call   <array_item_remove_with_shift@plt>
  movss  0xc(%rsp),%xmm0
  add    $0x10,%rsp
  mov    %rbp,%rdi
  pop    %rbp
  jmp    1060 <array_shrink_with_ratio@plt>
```

assistant: ```c
void array_item_remove_with_shift_with_shrink(struct array_s *a, unsigned long n, float ratio) {
  array_item_remove_with_shift(a, n);
  array_shrink_with_ratio(a, ratio);
}
```
user: 这段汇编代码用C语言表示是什么样的：

```asm
<libhl_cmp_keys_uint64>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %rcx,-0x30(%rbp)
  cmpq   $0x3,-0x20(%rbp)
  jbe    L10
  cmpq   $0x3,-0x30(%rbp)
  jbe    L10
  mov    -0x20(%rbp),%rax
  cmp    -0x30(%rbp),%rax
  je     L30
L10:
  mov    -0x20(%rbp),%rax
  mov    %eax,%edx
  mov    -0x30(%rbp),%rax
  mov    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  jmp    L33
L30:
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x28(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x8(%rbp),%eax
  sub    -0x4(%rbp),%eax
L33:
  pop    %rbp
  ret
```

assistant: ```c
int libhl_cmp_keys_uint64(void *k1, size_t k1size, void *k2, size_t k2size) {
  {
    if (k1size < sizeof(uint64_t) || k2size < sizeof(uint64_t) || k1size != k2size)
      return k1size - k2size;
    uint64_t _k1i = *((uint64_t *)k1);
    uint64_t _k2i = *((uint64_t *)k2);
    return _k1i - _k2i;
  };
}
```
user: What is the c source code of the assembly code below?

```asm
<libhl_cmp_keys_uint64>:
  endbr64
  cmp    $0x3,%rsi
  setbe  %al
  cmp    %rcx,%rsi
  setne  %r8b
  or     %r8b,%al
  jne    L0
  cmp    $0x3,%rcx
  ja     L19
L0:
  mov    %esi,%eax
  sub    %ecx,%eax
  ret
L19:
  mov    (%rdi),%esi
  mov    %esi,%eax
  sub    (%rdx),%eax
  ret
```

assistant: ```c
int libhl_cmp_keys_uint64(void *k1, size_t k1size, void *k2, size_t k2size) {
  {
    if (k1size < sizeof(uint64_t) || k2size < sizeof(uint64_t) || k1size != k2size)
      return k1size - k2size;
    uint64_t _k1i = *((uint64_t *)k1);
    uint64_t _k2i = *((uint64_t *)k2);
    return _k1i - _k2i;
  };
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<libhl_cmp_keys_uint64>:
  endbr64
  cmp    $0x3,%rsi
  setbe  %al
  cmp    %rcx,%rsi
  setne  %r8b
  or     %r8b,%al
  jne    L1
  cmp    $0x3,%rcx
  ja     L13
L1:
  mov    %esi,%eax
  sub    %ecx,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L13:
  mov    (%rdi),%eax
  sub    (%rdx),%eax
  ret
```

assistant: ```c
int libhl_cmp_keys_uint64(void *k1, size_t k1size, void *k2, size_t k2size) {
  {
    if (k1size < sizeof(uint64_t) || k2size < sizeof(uint64_t) || k1size != k2size)
      return k1size - k2size;
    uint64_t _k1i = *((uint64_t *)k1);
    uint64_t _k2i = *((uint64_t *)k2);
    return _k1i - _k2i;
  };
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<libhl_cmp_keys_uint64>:
  endbr64
  cmp    $0x3,%rsi
  setbe  %al
  cmp    %rcx,%rsi
  setne  %r8b
  or     %r8b,%al
  jne    L5
  cmp    $0x3,%rcx
  ja     L8
L5:
  mov    %esi,%eax
  sub    %ecx,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L8:
  mov    (%rdi),%eax
  sub    (%rdx),%eax
  ret
```

assistant: ```c
int libhl_cmp_keys_uint64(void *k1, size_t k1size, void *k2, size_t k2size) {
  {
    if (k1size < sizeof(uint64_t) || k2size < sizeof(uint64_t) || k1size != k2size)
      return k1size - k2size;
    uint64_t _k1i = *((uint64_t *)k1);
    uint64_t _k2i = *((uint64_t *)k2);
    return _k1i - _k2i;
  };
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<memrchr>:
  endbr64
  mov    %rdi,%rax
  mov    %esi,%edi
  add    %rdx,%rax
  test   %rdx,%rdx
  je     L82
  test   $0x7,%al
  je     L3
L90:
  sub    $0x1,%rax
  cmp    %dil,(%rax)
  je     L25
  sub    $0x1,%rdx
  je     L82
  test   $0x7,%al
  jne    L90
L3:
  movzbl %sil,%esi
  mov    %esi,%ecx
  shl    $0x8,%ecx
  or     %esi,%ecx
  movslq %ecx,%rcx
  mov    %rcx,%r8
  shl    $0x10,%r8
  or     %rcx,%r8
  cmp    $0x7,%rdx
  ja     L49
  jmp    L4
L119:
  lea    -0x5(%r9),%rax
  ret
L33:
  lea    -0x6(%r9),%rax
  ret
L32:
  lea    -0x7(%r9),%rax
  ret
L145:
  sub    $0x8,%rdx
  cmp    $0x7,%rdx
  jbe    L4
L49:
  mov    %rax,%r9
  sub    $0x8,%rax
  mov    %r8,%rsi
  xor    (%rax),%rsi
  lea    0x7efefeff(%rsi),%rcx
  xor    %rsi,%rcx
  or     $0x7efefeff,%rcx
  cmp    $0xffffffffffffffff,%rcx
  je     L145
  cmp    %dil,0x3(%rax)
  je     L119
  cmp    %dil,0x2(%rax)
  je     L33
  cmp    %dil,0x1(%rax)
  je     L32
  cmp    %dil,(%rax)
  jne    L145
L25:
  ret
L152:
  mov    $0x0,%eax
  ret
L82:
  mov    $0x0,%edx
L4:
  mov    %rax,%rcx
  sub    %rdx,%rcx
L18:
  cmp    %rcx,%rax
  je     L152
  sub    $0x1,%rax
  cmp    %dil,(%rax)
  jne    L18
  jmp    L25
```

assistant: ```c
void *memrchr(const void *s, int c_in, size_t n) {
  const unsigned char *char_ptr;
  const unsigned long int *longword_ptr;
  unsigned long int longword, magic_bits, charmask;
  unsigned char c;
  c = (unsigned char)c_in;
  for (char_ptr = (const unsigned char *)s + n; n > 0 && ((size_t)char_ptr & (sizeof(longword) - 1)) != 0; --n)
    if (*--char_ptr == c)
      return (void *)char_ptr;
  longword_ptr = (const unsigned long int *)char_ptr;
  if (sizeof(longword) != 4 && sizeof(longword) != 8)
    abort();
  magic_bits = 0x7efefeff;
  charmask = c | (c << 8);
  charmask |= charmask << 16;
  while (n >= sizeof(longword)) {
    longword = *--longword_ptr ^ charmask;
    if ((((longword + magic_bits) ^ ~longword) & ~magic_bits) != 0) {
      const unsigned char *cp = (const unsigned char *)longword_ptr;
      if (cp[3] == c)
        return (void *)&cp[3];
      if (cp[2] == c)
        return (void *)&cp[2];
      if (cp[1] == c)
        return (void *)&cp[1];
      if (cp[0] == c)
        return (void *)cp;
    }
    n -= sizeof(longword);
  }
  char_ptr = (const unsigned char *)longword_ptr;
  while (n-- > 0) {
    if (*--char_ptr == c)
      return (void *)char_ptr;
  }
  return 0;
}
```
user: Translate the below assembly code into C programming language:

```asm
<memrchr>:
  endbr64
  mov    %rdi,%r8
  mov    %esi,%edi
  lea    (%r8,%rdx,1),%rax
  test   %rdx,%rdx
  jne    L94
  jmp    L50
  nopw   0x0(%rax,%rax,1)
L126:
  sub    $0x1,%rax
  cmp    %dil,(%rax)
  je     L69
  sub    $0x1,%rdx
  je     L6
L94:
  test   $0x7,%al
  jne    L126
  movzbl %sil,%esi
  mov    %esi,%ecx
  shl    $0x8,%ecx
  or     %esi,%ecx
  movslq %ecx,%rcx
  mov    %rcx,%r8
  shl    $0x10,%r8
  or     %rcx,%r8
  cmp    $0x7,%rdx
  jbe    L6
  nopl   (%rax)
L49:
  mov    %rax,%r9
  mov    -0x8(%rax),%rsi
  sub    $0x8,%rax
  xor    %r8,%rsi
  lea    0x7efefeff(%rsi),%rcx
  xor    %rsi,%rcx
  or     $0x7efefeff,%rcx
  cmp    $0xffffffffffffffff,%rcx
  je     L59
  cmp    %dil,0x3(%rax)
  je     L61
  cmp    %dil,0x2(%rax)
  je     L29
  cmp    %dil,0x1(%rax)
  je     L30
  cmp    %dil,(%rax)
  je     L69
L59:
  sub    $0x8,%rdx
  cmp    $0x7,%rdx
  ja     L49
L6:
  mov    %rax,%rcx
  sub    %rdx,%rcx
  nopl   0x0(%rax)
L37:
  cmp    %rcx,%rax
  je     L50
  sub    $0x1,%rax
  cmp    %dil,(%rax)
  jne    L37
L69:
  ret
  nopw   0x0(%rax,%rax,1)
L61:
  lea    -0x5(%r9),%rax
  ret
  nopl   (%rax)
L29:
  lea    -0x6(%r9),%rax
  ret
  nopl   (%rax)
L30:
  lea    -0x7(%r9),%rax
  ret
  nopl   (%rax)
L50:
  xor    %eax,%eax
  ret
```

assistant: ```c
void *memrchr(const void *s, int c_in, size_t n) {
  const unsigned char *char_ptr;
  const unsigned long int *longword_ptr;
  unsigned long int longword, magic_bits, charmask;
  unsigned char c;
  c = (unsigned char)c_in;
  for (char_ptr = (const unsigned char *)s + n; n > 0 && ((size_t)char_ptr & (sizeof(longword) - 1)) != 0; --n)
    if (*--char_ptr == c)
      return (void *)char_ptr;
  longword_ptr = (const unsigned long int *)char_ptr;
  if (sizeof(longword) != 4 && sizeof(longword) != 8)
    abort();
  magic_bits = 0x7efefeff;
  charmask = c | (c << 8);
  charmask |= charmask << 16;
  while (n >= sizeof(longword)) {
    longword = *--longword_ptr ^ charmask;
    if ((((longword + magic_bits) ^ ~longword) & ~magic_bits) != 0) {
      const unsigned char *cp = (const unsigned char *)longword_ptr;
      if (cp[3] == c)
        return (void *)&cp[3];
      if (cp[2] == c)
        return (void *)&cp[2];
      if (cp[1] == c)
        return (void *)&cp[1];
      if (cp[0] == c)
        return (void *)cp;
    }
    n -= sizeof(longword);
  }
  char_ptr = (const unsigned char *)longword_ptr;
  while (n-- > 0) {
    if (*--char_ptr == c)
      return (void *)char_ptr;
  }
  return 0;
}
```