ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Translate the below assembly code into C programming language:

```asm
<r_read>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %edi,%r12d
  mov    %rsi,%rbp
  mov    %rdx,%rbx
L14:
  mov    %rbx,%rdx
  mov    %rbp,%rsi
  mov    %r12d,%edi
  call   <read@plt>
  cmp    $0xffffffff,%eax
  jne    L4
  mov    D9(%rip),%rcx
  mov    D5(%rip),%rdx
  mov    (%rdx),%rsi
  cmp    %rsi,(%rcx)
  je     L14
L4:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
ssize_t r_read(int fd, void *buf, size_t size) {
  ssize_t retval;
  while (retval = read(fd, buf, size), retval == -1 && errno == EINTR)
    ;
  return retval;
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<r_read>:
  endbr64
  push   %r12
  mov    %edi,%r12d
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdx,%rbx
  jmp    L4
  nopl   0x0(%rax,%rax,1)
L13:
  mov    D4(%rip),%rdx
  mov    D3(%rip),%rcx
  mov    (%rdx),%rsi
  cmp    %rsi,(%rcx)
  jne    L21
L4:
  mov    %rbx,%rdx
  mov    %rbp,%rsi
  mov    %r12d,%edi
  call   <read@plt>
  cmp    $0xffffffff,%eax
  je     L13
L21:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
ssize_t r_read(int fd, void *buf, size_t size) {
  ssize_t retval;
  while (retval = read(fd, buf, size), retval == -1 && errno == EINTR)
    ;
  return retval;
}
```
user: Translate the below assembly code into C programming language:

```asm
<r_read>:
  endbr64
  push   %r12
  mov    %edi,%r12d
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdx,%rbx
  jmp    L27
  nopl   0x0(%rax,%rax,1)
L25:
  mov    D2(%rip),%rdx
  mov    D17(%rip),%rcx
  mov    (%rdx),%rsi
  cmp    %rsi,(%rcx)
  jne    L8
L27:
  mov    %rbx,%rdx
  mov    %rbp,%rsi
  mov    %r12d,%edi
  call   <read@plt>
  cmp    $0xffffffff,%eax
  je     L25
L8:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
ssize_t r_read(int fd, void *buf, size_t size) {
  ssize_t retval;
  while (retval = read(fd, buf, size), retval == -1 && errno == EINTR)
    ;
  return retval;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<init_array>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,%edi
  call   <srand@plt>
  movl   $0x0,-0x4(%rbp)
  jmp    L2
L7:
  mov    $0x0,%eax
  call   <rand@plt>
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,4),%rcx
  mov    -0x18(%rbp),%rax
  lea    (%rcx,%rax,1),%rsi
  movslq %edx,%rax
  imul   $0x66666667,%rax,%rax
  shr    $0x20,%rax
  sar    %eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  mov    %eax,%ecx
  shl    $0x2,%ecx
  add    %eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  mov    %eax,(%rsi)
  addl   $0x1,-0x4(%rbp)
L2:
  mov    -0x4(%rbp),%eax
  cmp    $0xbffff,%eax
  jbe    L7
  nop
  nop
  leave
  ret
```

assistant: ```c
void init_array(int *start) {
  int i;
  srand(time(NULL));
  for (i = 0; i < 3 * 1024 * 1024 / sizeof(int); i++) {
    start[i] = rand() % 5;
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<init_array>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbp
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,%edi
  call   <srand@plt>
  mov    %rbp,%rbx
  add    $0x300000,%rbp
L7:
  mov    $0x0,%eax
  call   <rand@plt>
  movslq %eax,%rdx
  imul   $0x66666667,%rdx,%rdx
  sar    $0x21,%rdx
  mov    %eax,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,4),%edx
  sub    %edx,%eax
  mov    %eax,(%rbx)
  add    $0x4,%rbx
  cmp    %rbp,%rbx
  jne    L7
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

assistant: ```c
void init_array(int *start) {
  int i;
  srand(time(NULL));
  for (i = 0; i < 3 * 1024 * 1024 / sizeof(int); i++) {
    start[i] = rand() % 5;
  }
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<init_array>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  xor    %edi,%edi
  push   %rbx
  lea    0x300000(%rbp),%rbx
  sub    $0x8,%rsp
  call   <time@plt>
  mov    %eax,%edi
  call   <srand@plt>
  nopw   0x0(%rax,%rax,1)
L8:
  xor    %eax,%eax
  add    $0x4,%rbp
  call   <rand@plt>
  movslq %eax,%rdx
  mov    %eax,%ecx
  imul   $0x66666667,%rdx,%rdx
  sar    $0x1f,%ecx
  sar    $0x21,%rdx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,4),%edx
  sub    %edx,%eax
  mov    %eax,-0x4(%rbp)
  cmp    %rbx,%rbp
  jne    L8
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

assistant: ```c
void init_array(int *start) {
  int i;
  srand(time(NULL));
  for (i = 0; i < 3 * 1024 * 1024 / sizeof(int); i++) {
    start[i] = rand() % 5;
  }
}
```
user: What is the c source code of the assembly code below:

```asm
<init_array>:
  endbr64
  push   %rbp
  mov    %rdi,%rbp
  xor    %edi,%edi
  push   %rbx
  lea    0x300000(%rbp),%rbx
  sub    $0x8,%rsp
  call   <time@plt>
  mov    %eax,%edi
  call   <srand@plt>
  nopw   0x0(%rax,%rax,1)
L0:
  xor    %eax,%eax
  add    $0x4,%rbp
  call   <rand@plt>
  movslq %eax,%rdx
  mov    %eax,%ecx
  imul   $0x66666667,%rdx,%rdx
  sar    $0x1f,%ecx
  sar    $0x21,%rdx
  sub    %ecx,%edx
  lea    (%rdx,%rdx,4),%edx
  sub    %edx,%eax
  mov    %eax,-0x4(%rbp)
  cmp    %rbx,%rbp
  jne    L0
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
```

assistant: ```c
void init_array(int *start) {
  int i;
  srand(time(NULL));
  for (i = 0; i < 3 * 1024 * 1024 / sizeof(int); i++) {
    start[i] = rand() % 5;
  }
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<wfh_writeint>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    %edx,-0x20(%rbp)
  mov    -0x1c(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L15
L8:
  mov    -0x8(%rbp),%eax
  cltd
  shr    $0x18,%edx
  add    %edx,%eax
  movzbl %al,%eax
  sub    %edx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x8(%rbp),%eax
  lea    0xff(%rax),%edx
  test   %eax,%eax
  cmovs  %edx,%eax
  sar    $0x8,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x18(%rbp),%rdx
  mov    -0x4(%rbp),%eax
  mov    %rdx,%rsi
  mov    %eax,%edi
  call   <fputc@plt>
  addl   $0x1,-0xc(%rbp)
L15:
  mov    -0xc(%rbp),%eax
  cmp    -0x20(%rbp),%eax
  jl     L8
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <fflush@plt>
  mov    D0(%rip),%rax
  mov    (%rax),%edx
  mov    -0x18(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <fseek@plt>
  nop
  leave
  ret
```

assistant: ```c
void wfh_writeint(FILE *file1, int data, int len) {
  int i;
  int d;
  d = data;
  for (i = 0; i < len; i++) {
    int w;
    w = d % 256;
    d = d / 256;
    fputc(w, file1);
  }
  fflush(file1);
  fseek(file1, 0, SEEK_CUR);
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<wfh_writeint>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%r12
  test   %edx,%edx
  jle    L2
  mov    %esi,%ebx
  mov    %edx,%r13d
  mov    $0x0,%ebp
L1:
  mov    %ebx,%eax
  sar    $0x1f,%eax
  shr    $0x18,%eax
  lea    (%rbx,%rax,1),%edi
  movzbl %dil,%edi
  sub    %eax,%edi
  lea    0xff(%rbx),%eax
  test   %ebx,%ebx
  cmovns %ebx,%eax
  sar    $0x8,%eax
  mov    %eax,%ebx
  mov    %r12,%rsi
  call   <fputc@plt>
  add    $0x1,%ebp
  cmp    %ebp,%r13d
  jne    L1
L2:
  mov    %r12,%rdi
  call   <fflush@plt>
  mov    D0(%rip),%rax
  mov    (%rax),%edx
  mov    $0x0,%esi
  mov    %r12,%rdi
  call   <fseek@plt>
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
```

assistant: ```c
void wfh_writeint(FILE *file1, int data, int len) {
  int i;
  int d;
  d = data;
  for (i = 0; i < len; i++) {
    int w;
    w = d % 256;
    d = d / 256;
    fputc(w, file1);
  }
  fflush(file1);
  fseek(file1, 0, SEEK_CUR);
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<wfh_writeint>:
  endbr64
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %edx,%edx
  jle    L11
  mov    %esi,%ebx
  mov    %edx,%ebp
  xor    %r12d,%r12d
  nopl   0x0(%rax)
L8:
  mov    %ebx,%eax
  mov    %r13,%rsi
  sar    $0x1f,%eax
  shr    $0x18,%eax
  lea    (%rbx,%rax,1),%edi
  movzbl %dil,%edi
  sub    %eax,%edi
  test   %ebx,%ebx
  lea    0xff(%rbx),%eax
  cmovs  %eax,%ebx
  add    $0x1,%r12d
  call   <fputc@plt>
  sar    $0x8,%ebx
  cmp    %r12d,%ebp
  jne    L8
L11:
  mov    %r13,%rdi
  call   <fflush@plt>
  mov    D5(%rip),%rax
  mov    %r13,%rdi
  xor    %esi,%esi
  mov    (%rax),%edx
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  jmp    1090 <fseek@plt>
```

assistant: ```c
void wfh_writeint(FILE *file1, int data, int len) {
  int i;
  int d;
  d = data;
  for (i = 0; i < len; i++) {
    int w;
    w = d % 256;
    d = d / 256;
    fputc(w, file1);
  }
  fflush(file1);
  fseek(file1, 0, SEEK_CUR);
}
```
user: What is the c source code of the assembly code below:

```asm
<wfh_writeint>:
  endbr64
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %edx,%edx
  jle    L12
  mov    %esi,%ebx
  mov    %edx,%ebp
  xor    %r12d,%r12d
  nopl   0x0(%rax)
L6:
  mov    %ebx,%eax
  mov    %r13,%rsi
  sar    $0x1f,%eax
  shr    $0x18,%eax
  lea    (%rbx,%rax,1),%edi
  movzbl %dil,%edi
  sub    %eax,%edi
  test   %ebx,%ebx
  lea    0xff(%rbx),%eax
  cmovs  %eax,%ebx
  add    $0x1,%r12d
  call   <fputc@plt>
  sar    $0x8,%ebx
  cmp    %r12d,%ebp
  jne    L6
L12:
  mov    %r13,%rdi
  call   <fflush@plt>
  mov    D1(%rip),%rax
  mov    %r13,%rdi
  xor    %esi,%esi
  mov    (%rax),%edx
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  jmp    1090 <fseek@plt>
```

assistant: ```c
void wfh_writeint(FILE *file1, int data, int len) {
  int i;
  int d;
  d = data;
  for (i = 0; i < len; i++) {
    int w;
    w = d % 256;
    d = d / 256;
    fputc(w, file1);
  }
  fflush(file1);
  fseek(file1, 0, SEEK_CUR);
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<trampoline_delete_code>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    -0x18(%rbp),%rax
  mov    -0x20(%rbp),%rcx
  mov    -0x28(%rbp),%rdx
  mov    %rax,%rdi
  mov    %rcx,%rsi
  lea    D5(%rip),%r11
  mov    %r11,%fs:0x20
  jmp    *%gs:0x100f8
  mov    %rax,-0x8(%rbp)
  mov    -0x8(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
__attribute__((no)) long trampoline_delete_code(unsigned long n1, unsigned long n2, unsigned long n3) {
  long ret;
  __asm__ __volatile__("leaq 1f(%%rip), %%r11\n\t"
                       "movq %%r11, %%fs:0x20\n\t"
                       "jmpq *%%gs:0x10000+"
                       "0xF8"
                       "\n\t"
                       "1:\n\t"
                       : "=a"(ret)
                       : "D"(n1), "S"(n2), "d"(n3)
                       : "memory");
  return ret;
}
```
user: Translate the below assembly code into C programming language:

```asm
<trampoline_delete_code>:
  endbr64
  lea    D7(%rip),%r11
  mov    %r11,%fs:0x20
  jmp    *%gs:0x100f8
  ret
```

assistant: ```c
__attribute__((no)) long trampoline_delete_code(unsigned long n1, unsigned long n2, unsigned long n3) {
  long ret;
  __asm__ __volatile__("leaq 1f(%%rip), %%r11\n\t"
                       "movq %%r11, %%fs:0x20\n\t"
                       "jmpq *%%gs:0x10000+"
                       "0xF8"
                       "\n\t"
                       "1:\n\t"
                       : "=a"(ret)
                       : "D"(n1), "S"(n2), "d"(n3)
                       : "memory");
  return ret;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<trampoline_delete_code>:
  endbr64
  lea    D1(%rip),%r11
  mov    %r11,%fs:0x20
  jmp    *%gs:0x100f8
  ret
```

assistant: ```c
__attribute__((no)) long trampoline_delete_code(unsigned long n1, unsigned long n2, unsigned long n3) {
  long ret;
  __asm__ __volatile__("leaq 1f(%%rip), %%r11\n\t"
                       "movq %%r11, %%fs:0x20\n\t"
                       "jmpq *%%gs:0x10000+"
                       "0xF8"
                       "\n\t"
                       "1:\n\t"
                       : "=a"(ret)
                       : "D"(n1), "S"(n2), "d"(n3)
                       : "memory");
  return ret;
}
```
user: 这段汇编代码用C语言表示是什么样的:

```asm
<trampoline_delete_code>:
  endbr64
  lea    D9(%rip),%r11
  mov    %r11,%fs:0x20
  jmp    *%gs:0x100f8
  ret
```

assistant: ```c
__attribute__((no)) long trampoline_delete_code(unsigned long n1, unsigned long n2, unsigned long n3) {
  long ret;
  __asm__ __volatile__("leaq 1f(%%rip), %%r11\n\t"
                       "movq %%r11, %%fs:0x20\n\t"
                       "jmpq *%%gs:0x10000+"
                       "0xF8"
                       "\n\t"
                       "1:\n\t"
                       : "=a"(ret)
                       : "D"(n1), "S"(n2), "d"(n3)
                       : "memory");
  return ret;
}
```
user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<clean_line>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <skipsp@plt>
  mov    %rax,-0x18(%rbp)
  movl   $0x0,-0x4(%rbp)
  jmp    L22
L67:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x23,%al
  jne    L46
  cmpl   $0x0,-0x4(%rbp)
  je     L6
  mov    -0x4(%rbp),%eax
  cltq
  lea    -0x1(%rax),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x5c,%al
  jne    L6
L46:
  addl   $0x1,-0x4(%rbp)
L22:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0xa,%al
  je     L6
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0xd,%al
  je     L6
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L67
L6:
  mov    -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  mov    -0x18(%rbp),%rax
  leave
  ret
```

assistant: ```c
char *clean_line(char *s) {
  int i;
  s = skipsp(s);
  for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++)
    if (s[i] == '#' && (i == 0 || s[i - 1] != '\\'))
      break;
  s[i] = '\0';
  return (s);
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<clean_line>:
  endbr64
  sub    $0x8,%rsp
  call   <skipsp@plt>
  movzbl (%rax),%edx
  cmp    $0xd,%dl
  ja     L16
  mov    $0x2401,%ecx
  bt     %rdx,%rcx
  jb     L10
  mov    %rax,%rcx
  mov    $0x0,%esi
  jmp    L101
L16:
  mov    %rax,%rcx
  mov    $0x0,%esi
L101:
  mov    $0x2401,%edi
L95:
  cmp    $0x23,%dl
  je     L79
L8:
  add    $0x1,%esi
  add    $0x1,%rcx
  movzbl (%rcx),%edx
  cmp    $0xd,%dl
  ja     L95
  bt     %rdx,%rdi
  jae    L95
  jmp    L15
L79:
  test   %esi,%esi
  jne    L30
L15:
  movb   $0x0,(%rcx)
  add    $0x8,%rsp
  ret
L30:
  cmpb   $0x5c,-0x1(%rcx)
  je     L8
  jmp    L15
L10:
  mov    %rax,%rcx
  jmp    L15
```

assistant: ```c
char *clean_line(char *s) {
  int i;
  s = skipsp(s);
  for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++)
    if (s[i] == '#' && (i == 0 || s[i - 1] != '\\'))
      break;
  s[i] = '\0';
  return (s);
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<clean_line>:
  endbr64
  sub    $0x8,%rsp
  call   <skipsp@plt>
  movzbl (%rax),%edx
  cmp    $0xd,%dl
  ja     L10
  mov    $0xffffffffffffdbfe,%rcx
  bt     %rdx,%rcx
  mov    %rax,%rcx
  jae    L44
L12:
  xor    %esi,%esi
  mov    $0xffffffffffffdbfe,%rdi
L86:
  cmp    $0x23,%dl
  je     L40
L68:
  movzbl 0x1(%rcx),%edx
  add    $0x1,%rcx
  add    $0x1,%esi
  cmp    $0xd,%dl
  ja     L86
  bt     %rdx,%rdi
  jb     L86
L44:
  movb   $0x0,(%rcx)
  add    $0x8,%rsp
  ret
  nopl   0x0(%rax)
L40:
  test   %esi,%esi
  je     L44
  cmpb   $0x5c,-0x1(%rcx)
  je     L68
  jmp    L44
  nopl   0x0(%rax)
L10:
  mov    %rax,%rcx
  jmp    L12
```

assistant: ```c
char *clean_line(char *s) {
  int i;
  s = skipsp(s);
  for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++)
    if (s[i] == '#' && (i == 0 || s[i - 1] != '\\'))
      break;
  s[i] = '\0';
  return (s);
}
```
user: 这段汇编代码用C语言表示是什么样的:

```asm
<clean_line>:
  endbr64
  sub    $0x8,%rsp
  call   <skipsp@plt>
  movzbl (%rax),%edx
  cmp    $0xd,%dl
  ja     L53
  mov    $0xffffffffffffdbfe,%rcx
  bt     %rdx,%rcx
  mov    %rax,%rcx
  jae    L11
L65:
  xor    %esi,%esi
  mov    $0xffffffffffffdbfe,%rdi
L8:
  cmp    $0x23,%dl
  je     L12
L60:
  movzbl 0x1(%rcx),%edx
  add    $0x1,%rcx
  add    $0x1,%esi
  cmp    $0xd,%dl
  ja     L8
  bt     %rdx,%rdi
  jb     L8
L11:
  movb   $0x0,(%rcx)
  add    $0x8,%rsp
  ret
  nopl   0x0(%rax)
L12:
  test   %esi,%esi
  je     L11
  cmpb   $0x5c,-0x1(%rcx)
  je     L60
  jmp    L11
  nopl   0x0(%rax)
L53:
  mov    %rax,%rcx
  jmp    L65
```

assistant: ```c
char *clean_line(char *s) {
  int i;
  s = skipsp(s);
  for (i = 0; s[i] != '\n' && s[i] != '\r' && s[i] != '\0'; i++)
    if (s[i] == '#' && (i == 0 || s[i - 1] != '\\'))
      break;
  s[i] = '\0';
  return (s);
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<SDL_imageFilterAbsDiff>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %rsi,-0x40(%rbp)
  mov    %rdx,-0x48(%rbp)
  mov    %ecx,-0x4c(%rbp)
  mov    $0x0,%eax
  call   <SDL_imageFilterMMXdetect@plt>
  test   %rax,%rax
  je     L15
  cmpl   $0x7,-0x4c(%rbp)
  jle    L15
  mov    -0x4c(%rbp),%ecx
  mov    -0x48(%rbp),%rdx
  mov    -0x40(%rbp),%rsi
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <SDL_imageFilterAbsDiffMMX@plt>
  mov    -0x4c(%rbp),%eax
  and    $0x7,%eax
  test   %eax,%eax
  jle    L27
  mov    -0x4c(%rbp),%eax
  and    $0xfffffff8,%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x20(%rbp),%edx
  mov    -0x38(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x20(%rbp),%edx
  mov    -0x40(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x20(%rbp),%edx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x8(%rbp)
  jmp    L40
L27:
  mov    $0x0,%eax
  jmp    L23
L15:
  movl   $0x0,-0x20(%rbp)
  mov    -0x38(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x40(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x8(%rbp)
L40:
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  jmp    L25
L45:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  mov    %eax,%edx
  neg    %edx
  cmovns %edx,%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x1c(%rbp),%eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%rax
  mov    %dl,(%rax)
  addq   $0x1,-0x18(%rbp)
  addq   $0x1,-0x10(%rbp)
  addq   $0x1,-0x8(%rbp)
  addl   $0x1,-0x24(%rbp)
L25:
  mov    -0x4c(%rbp),%eax
  cmp    %eax,-0x24(%rbp)
  jb     L45
  mov    $0x0,%eax
L23:
  leave
  ret
```

assistant: ```c
int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterAbsDiffMMX(Src1, Src2, Dest, length);
    if ((length & 7) > 0) {
      istart = length & 0xfffffff8;
      cursrc1 = &Src1[istart];
      cursrc2 = &Src2[istart];
      curdst = &Dest[istart];
    } else {
      return (0);
    }
  } else {
    istart = 0;
    cursrc1 = Src1;
    cursrc2 = Src2;
    curdst = Dest;
  }
  for (i = istart; i < length; i++) {
    result = abs((int)*cursrc1 - (int)*cursrc2);
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<SDL_imageFilterAbsDiff>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %rdx,%r12
  mov    %ecx,%r13d
  mov    $0x0,%eax
  call   <SDL_imageFilterMMXdetect@plt>
  cmp    $0x7,%r13d
  jle    L7
  test   %rax,%rax
  jne    L30
L7:
  mov    $0x0,%eax
L10:
  cmp    %r13d,%eax
  jae    L48
  lea    -0x1(%r13),%esi
  sub    %eax,%esi
  mov    $0x0,%eax
L40:
  movzbl (%rbx,%rax,1),%edx
  movzbl 0x0(%rbp,%rax,1),%ecx
  sub    %ecx,%edx
  mov    %edx,%ecx
  neg    %ecx
  cmovns %ecx,%edx
  mov    %dl,(%r12,%rax,1)
  mov    %rax,%rdx
  add    $0x1,%rax
  cmp    %rsi,%rdx
  jne    L40
L48:
  mov    $0x0,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L30:
  mov    %r13d,%ecx
  mov    %r12,%rdx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <SDL_imageFilterAbsDiffMMX@plt>
  test   $0x7,%r13b
  je     L48
  mov    %r13d,%eax
  and    $0xfffffff8,%eax
  mov    %eax,%edx
  add    %rdx,%rbx
  add    %rdx,%rbp
  add    %rdx,%r12
  jmp    L10
```

assistant: ```c
int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterAbsDiffMMX(Src1, Src2, Dest, length);
    if ((length & 7) > 0) {
      istart = length & 0xfffffff8;
      cursrc1 = &Src1[istart];
      cursrc2 = &Src2[istart];
      curdst = &Dest[istart];
    } else {
      return (0);
    }
  } else {
    istart = 0;
    cursrc1 = Src1;
    cursrc2 = Src2;
    curdst = Dest;
  }
  for (i = istart; i < length; i++) {
    result = abs((int)*cursrc1 - (int)*cursrc2);
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```
user: 这段汇编代码用C语言表示是什么样的?

```asm
<SDL_imageFilterAbsDiff>:
  endbr64
  push   %r13
  xor    %eax,%eax
  mov    %rdx,%r13
  push   %r12
  mov    %rsi,%r12
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %ecx,%ebx
  sub    $0x8,%rsp
  call   <SDL_imageFilterMMXdetect@plt>
  test   %rax,%rax
  je     L39
  cmp    $0x7,%ebx
  jg     L41
L39:
  xor    %eax,%eax
L24:
  cmp    %ebx,%eax
  jae    L13
  lea    -0x1(%rbx),%ecx
  sub    %eax,%ecx
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L47:
  movzbl (%r12,%rax,1),%esi
  movzbl 0x0(%rbp,%rax,1),%edx
  sub    %esi,%edx
  mov    %edx,%esi
  neg    %esi
  cmovns %esi,%edx
  mov    %dl,0x0(%r13,%rax,1)
  mov    %rax,%rdx
  add    $0x1,%rax
  cmp    %rcx,%rdx
  jne    L47
L13:
  add    $0x8,%rsp
  xor    %eax,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L41:
  mov    %ebx,%ecx
  mov    %r13,%rdx
  mov    %r12,%rsi
  mov    %rbp,%rdi
  call   <SDL_imageFilterAbsDiffMMX@plt>
  test   $0x7,%bl
  je     L13
  mov    %ebx,%eax
  and    $0xfffffff8,%eax
  mov    %eax,%edx
  add    %rdx,%rbp
  add    %rdx,%r12
  add    %rdx,%r13
  jmp    L24
```

assistant: ```c
int SDL_imageFilterAbsDiff(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterAbsDiffMMX(Src1, Src2, Dest, length);
    if ((length & 7) > 0) {
      istart = length & 0xfffffff8;
      cursrc1 = &Src1[istart];
      cursrc2 = &Src2[istart];
      curdst = &Dest[istart];
    } else {
      return (0);
    }
  } else {
    istart = 0;
    cursrc1 = Src1;
    cursrc2 = Src2;
    curdst = Dest;
  }
  for (i = istart; i < length; i++) {
    result = abs((int)*cursrc1 - (int)*cursrc2);
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```