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

```asm
<double_matrix>:
  endbr64
  push   %r15
  mov    %esi,%eax
  push   %r14
  sub    %edi,%eax
  push   %r13
  mov    %ecx,%r13d
  push   %r12
  mov    %edi,%r12d
  lea    0x8(,%rax,8),%edi
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  movslq %edx,%rbx
  sub    $0x8,%rsp
  call   <space@plt>
  mov    %rax,%r15
  test   %rax,%rax
  je     L61
L24:
  movslq %r12d,%r14
  lea    0x0(,%r14,8),%rax
  sub    %rax,%r15
  cmp    %r12d,%ebp
  jl     L68
  sub    %ebx,%r13d
  shl    $0x3,%rbx
  lea    0x8(,%r13,8),%r12d
  neg    %rbx
  lea    D9(%rip),%r13
  jmp    L33
  nopw   0x0(%rax,%rax,1)
L63:
  add    %rbx,%rax
  mov    %rax,(%r15,%r14,8)
  add    $0x1,%r14
  cmp    %r14d,%ebp
  jl     L68
L33:
  mov    %r12d,%edi
  call   <space@plt>
  mov    %rax,(%r15,%r14,8)
  test   %rax,%rax
  jne    L63
  mov    %r13,%rdi
  call   <nrerror@plt>
  mov    (%r15,%r14,8),%rax
  add    %rbx,%rax
  mov    %rax,(%r15,%r14,8)
  add    $0x1,%r14
  cmp    %r14d,%ebp
  jge    L33
L68:
  add    $0x8,%rsp
  mov    %r15,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nop
L61:
  lea    D14(%rip),%rdi
  call   <nrerror@plt>
  jmp    L24
```

tool_calls: name: disassemble_data
arguments: tag: D9
datatype: string
name: disassemble_data
arguments: tag: D14
datatype: string

tool: D9: MATRIX, allocation failure 2.

tool: D14: MATRIX, allocation failure 1.

assistant: ```c
double **double_matrix(int nrl, int nrh, int ncl, int nch) {
  int i;
  double **m;
  m = (double **)space((unsigned)(nrh - nrl + 1) * sizeof(double *));
  if (!m)
    nrerror("MATRIX, allocation failure 1.");
  m -= nrl;
  for (i = nrl; i <= nrh; i++) {
    m[i] = (double *)space((unsigned)(nch - ncl + 1) * sizeof(double));
    if (!m[i])
      nrerror("MATRIX, allocation failure 2.");
    m[i] -= ncl;
  }
  return m;
}
```
user: Translate the below assembly code into C programming language:

```asm
<double_matrix>:
  endbr64
  push   %r15
  mov    %esi,%eax
  push   %r14
  sub    %edi,%eax
  push   %r13
  mov    %ecx,%r13d
  push   %r12
  mov    %edi,%r12d
  lea    0x8(,%rax,8),%edi
  push   %rbp
  mov    %esi,%ebp
  push   %rbx
  movslq %edx,%rbx
  sub    $0x8,%rsp
  call   <space@plt>
  mov    %rax,%r15
  test   %rax,%rax
  je     L2
L45:
  movslq %r12d,%r14
  lea    0x0(,%r14,8),%rax
  sub    %rax,%r15
  cmp    %r12d,%ebp
  jl     L8
  sub    %ebx,%r13d
  shl    $0x3,%rbx
  lea    0x8(,%r13,8),%r12d
  neg    %rbx
  lea    D18(%rip),%r13
  nopl   (%rax)
L30:
  mov    %r12d,%edi
  call   <space@plt>
  mov    %rax,(%r15,%r14,8)
  test   %rax,%rax
  je     L13
  add    %rbx,%rax
  mov    %rax,(%r15,%r14,8)
  add    $0x1,%r14
  cmp    %r14d,%ebp
  jge    L30
L8:
  add    $0x8,%rsp
  mov    %r15,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   0x0(%rax,%rax,1)
L13:
  mov    %r13,%rdi
  call   <nrerror@plt>
  add    %rbx,(%r15,%r14,8)
  add    $0x1,%r14
  cmp    %r14d,%ebp
  jge    L30
  jmp    L8
  nopw   0x0(%rax,%rax,1)
L2:
  lea    D0(%rip),%rdi
  call   <nrerror@plt>
  jmp    L45
```

tool_calls: name: disassemble_data
arguments: tag: D18
datatype: string
name: disassemble_data
arguments: tag: D0
datatype: string

tool: D18: MATRIX, allocation failure 2.

tool: D0: MATRIX, allocation failure 1.

assistant: ```c
double **double_matrix(int nrl, int nrh, int ncl, int nch) {
  int i;
  double **m;
  m = (double **)space((unsigned)(nrh - nrl + 1) * sizeof(double *));
  if (!m)
    nrerror("MATRIX, allocation failure 1.");
  m -= nrl;
  for (i = nrl; i <= nrh; i++) {
    m[i] = (double *)space((unsigned)(nch - ncl + 1) * sizeof(double));
    if (!m[i])
      nrerror("MATRIX, allocation failure 2.");
    m[i] -= ncl;
  }
  return m;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<check_unix>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x40,%rsp
  mov    %rdi,-0x38(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <assert@plt>
  movl   $0xffffffff,-0x2c(%rbp)
  mov    D1(%rip),%rax
  mov    (%rax),%ecx
  mov    D11(%rip),%rax
  mov    (%rax),%eax
  mov    $0x0,%edx
  mov    %ecx,%esi
  mov    %eax,%edi
  call   <socket@plt>
  mov    %eax,-0x28(%rbp)
  cmpl   $0xffffffff,-0x28(%rbp)
  jne    L24
  mov    -0x2c(%rbp),%eax
  jmp    L47
L24:
  lea    -0x20(%rbp),%rax
  mov    $0x10,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <memset@plt>
  mov    D11(%rip),%rax
  mov    (%rax),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x20(%rbp),%rax
  mov    -0x38(%rbp),%rcx
  mov    $0x7,%edx
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncpy@plt>
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  add    $0x4,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x40,%al
  jne    L5
  mov    -0x20(%rbp),%rax
  movb   $0x0,(%rax)
L5:
  mov    -0x24(%rbp),%edx
  lea    -0x20(%rbp),%rcx
  mov    -0x28(%rbp),%eax
  mov    %rcx,%rsi
  mov    %eax,%edi
  call   <connect@plt>
  test   %rax,%rax
  jne    L25
  movl   $0x0,-0x2c(%rbp)
L25:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <close@plt>
  mov    -0x2c(%rbp),%eax
L47:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L33
  call   <__stack_chk_fail@plt>
L33:
  leave
  ret
```

assistant: ```c
int check_unix(const char *sockfile) {
  assert(sockfile);
  int rv = -1;
  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
  if (sock == -1)
    return rv;
  struct sockaddr_un remote;
  memset(&remote, 0, sizeof(struct sockaddr_un));
  remote.sun_family = AF_UNIX;
  strncpy(remote.sun_path, sockfile, sizeof(remote.sun_path) - 1);
  int len = strlen(remote.sun_path) + sizeof(remote.sun_family);
  if (*sockfile == '@')
    remote.sun_path[0] = '\0';
  if (connect(sock, (struct sockaddr *)&remote, len) == 0)
    rv = 0;
  close(sock);
  return rv;
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<check_unix>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %rdi,%rbp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  call   <assert@plt>
  mov    $0x0,%edx
  mov    D22(%rip),%rax
  mov    (%rax),%esi
  mov    D27(%rip),%rax
  mov    (%rax),%edi
  call   <socket@plt>
  mov    %eax,%ebx
  cmp    $0xffffffff,%eax
  je     L36
  mov    %rsp,%rdi
  mov    $0x10,%edx
  mov    $0x0,%esi
  call   <memset@plt>
  mov    D27(%rip),%rax
  mov    (%rax),%eax
  mov    %eax,0x8(%rsp)
  mov    $0x7,%edx
  mov    %rbp,%rsi
  mov    (%rsp),%rdi
  call   <strncpy@plt>
  mov    (%rsp),%rdi
  call   <strlen@plt>
  lea    0x4(%rax),%edx
  cmpb   $0x40,0x0(%rbp)
  je     L46
L17:
  mov    %rsp,%rsi
  mov    %ebx,%edi
  call   <connect@plt>
  neg    %rax
  sbb    %ebp,%ebp
  mov    %ebx,%edi
  call   <close@plt>
L10:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L5
  mov    %ebp,%eax
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  ret
L46:
  mov    (%rsp),%rax
  movb   $0x0,(%rax)
  jmp    L17
L36:
  mov    %eax,%ebp
  jmp    L10
L5:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int check_unix(const char *sockfile) {
  assert(sockfile);
  int rv = -1;
  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
  if (sock == -1)
    return rv;
  struct sockaddr_un remote;
  memset(&remote, 0, sizeof(struct sockaddr_un));
  remote.sun_family = AF_UNIX;
  strncpy(remote.sun_path, sockfile, sizeof(remote.sun_path) - 1);
  int len = strlen(remote.sun_path) + sizeof(remote.sun_family);
  if (*sockfile == '@')
    remote.sun_path[0] = '\0';
  if (connect(sock, (struct sockaddr *)&remote, len) == 0)
    rv = 0;
  close(sock);
  return rv;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<check_unix>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  call   <assert@plt>
  mov    D5(%rip),%r12
  mov    D18(%rip),%rax
  xor    %edx,%edx
  mov    (%rax),%esi
  mov    (%r12),%edi
  call   <socket@plt>
  cmp    $0xffffffff,%eax
  je     L19
  mov    %rsp,%r13
  xor    %esi,%esi
  mov    $0x10,%edx
  mov    %eax,%ebp
  mov    %r13,%rdi
  call   <memset@plt>
  mov    (%r12),%eax
  mov    (%rsp),%rdi
  mov    %rbx,%rsi
  mov    $0x7,%edx
  mov    %eax,0x8(%rsp)
  call   <strncpy@plt>
  mov    (%rsp),%rdi
  call   <strlen@plt>
  cmpb   $0x40,(%rbx)
  lea    0x4(%rax),%edx
  jne    L18
  mov    (%rsp),%rax
  movb   $0x0,(%rax)
L18:
  mov    %ebp,%edi
  mov    %r13,%rsi
  call   <connect@plt>
  mov    %ebp,%edi
  neg    %rax
  sbb    %r12d,%r12d
  call   <close@plt>
L16:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L7
  add    $0x28,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L19:
  mov    $0xffffffff,%r12d
  jmp    L16
L7:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int check_unix(const char *sockfile) {
  assert(sockfile);
  int rv = -1;
  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
  if (sock == -1)
    return rv;
  struct sockaddr_un remote;
  memset(&remote, 0, sizeof(struct sockaddr_un));
  remote.sun_family = AF_UNIX;
  strncpy(remote.sun_path, sockfile, sizeof(remote.sun_path) - 1);
  int len = strlen(remote.sun_path) + sizeof(remote.sun_family);
  if (*sockfile == '@')
    remote.sun_path[0] = '\0';
  if (connect(sock, (struct sockaddr *)&remote, len) == 0)
    rv = 0;
  close(sock);
  return rv;
}
```
user: Demonstrate the C code that generates the assembly output below:

```asm
<check_unix>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  sub    $0x28,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18(%rsp)
  xor    %eax,%eax
  call   <assert@plt>
  mov    D18(%rip),%r12
  mov    D2(%rip),%rax
  xor    %edx,%edx
  mov    (%rax),%esi
  mov    (%r12),%edi
  call   <socket@plt>
  cmp    $0xffffffff,%eax
  je     L0
  mov    %rsp,%r13
  xor    %esi,%esi
  mov    $0x10,%edx
  mov    %eax,%ebp
  mov    %r13,%rdi
  call   <memset@plt>
  mov    (%r12),%eax
  mov    (%rsp),%rdi
  mov    %rbx,%rsi
  mov    $0x7,%edx
  mov    %eax,0x8(%rsp)
  call   <strncpy@plt>
  mov    (%rsp),%rdi
  call   <strlen@plt>
  cmpb   $0x40,(%rbx)
  lea    0x4(%rax),%edx
  jne    L14
  mov    (%rsp),%rax
  movb   $0x0,(%rax)
L14:
  mov    %ebp,%edi
  mov    %r13,%rsi
  call   <connect@plt>
  mov    %ebp,%edi
  neg    %rax
  sbb    %r12d,%r12d
  call   <close@plt>
L34:
  mov    0x18(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L27
  add    $0x28,%rsp
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L0:
  mov    $0xffffffff,%r12d
  jmp    L34
L27:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int check_unix(const char *sockfile) {
  assert(sockfile);
  int rv = -1;
  int sock = socket(AF_UNIX, SOCK_STREAM, 0);
  if (sock == -1)
    return rv;
  struct sockaddr_un remote;
  memset(&remote, 0, sizeof(struct sockaddr_un));
  remote.sun_family = AF_UNIX;
  strncpy(remote.sun_path, sockfile, sizeof(remote.sun_path) - 1);
  int len = strlen(remote.sun_path) + sizeof(remote.sun_family);
  if (*sockfile == '@')
    remote.sun_path[0] = '\0';
  if (connect(sock, (struct sockaddr *)&remote, len) == 0)
    rv = 0;
  close(sock);
  return rv;
}
```
user: 请将这段汇编代码片段转换成等效的C代码:

```asm
<compare_hostnames>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0xc(%rbp)
  jmp    L8
L16:
  movl   $0x0,-0x8(%rbp)
  movl   $0x0,-0x4(%rbp)
  jmp    L102
L122:
  mov    -0x8(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  add    %eax,%eax
  mov    %eax,%ecx
  mov    -0x18(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x18(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  add    %ecx,%eax
  sub    $0x30,%eax
  mov    %eax,-0x8(%rbp)
L102:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L178
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L122
  jmp    L178
L69:
  mov    -0x4(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  add    %eax,%eax
  mov    %eax,%ecx
  mov    -0x20(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x20(%rbp)
  movzbl (%rax),%eax
  movsbl %al,%eax
  add    %ecx,%eax
  sub    $0x30,%eax
  mov    %eax,-0x4(%rbp)
L178:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L81
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  cmp    $0x2e,%al
  jne    L69
L81:
  mov    -0x8(%rbp),%eax
  cmp    -0x4(%rbp),%eax
  je     L132
  mov    -0x8(%rbp),%eax
  sub    -0x4(%rbp),%eax
  jmp    L2
L132:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L71
  addq   $0x1,-0x18(%rbp)
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L44
  jmp    L43
L71:
  mov    -0x20(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L14
  mov    $0xffffffff,%eax
  jmp    L2
L14:
  mov    $0x0,%eax
  jmp    L2
L43:
  addq   $0x1,-0x20(%rbp)
  jmp    L117
L44:
  mov    $0x1,%eax
  jmp    L2
L117:
  addl   $0x1,-0xc(%rbp)
L8:
  cmpl   $0x3,-0xc(%rbp)
  jle    L16
  mov    $0x0,%eax
L2:
  pop    %rbp
  ret
```

assistant: ```c
int compare_hostnames(char *pa, char *pb) {
  int i;
  for (i = 0; i < 4; i++) {
    int ia = 0, ib = 0;
    while ((*pa) && (*pa != '.'))
      ia = ia * 10 + *pa++ - '0';
    while ((*pb) && (*pb != '.'))
      ib = ib * 10 + *pb++ - '0';
    if (ia != ib)
      return ia - ib;
    if (*pa)
      pa++;
    else if (*pb)
      return -1;
    else
      return 0;
    if (*pb)
      pb++;
    else
      return 1;
  }
  return 0;
}
```
user: What is the c source code of the assembly code below:

```asm
<compare_hostnames>:
  endbr64
  mov    $0x4,%r9d
  mov    $0x0,%r10d
  jmp    L61
L20:
  mov    %r10d,%r8d
L121:
  cmp    %r8d,%eax
  jne    L112
  test   %cl,%cl
  je     L41
  add    $0x1,%rdi
  test   %dl,%dl
  je     L81
  add    $0x1,%rsi
  sub    $0x1,%r9d
  je     L79
L61:
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L38
  mov    %r10d,%eax
  cmp    $0x2e,%cl
  je     L38
L76:
  add    $0x1,%rdi
  lea    (%rax,%rax,4),%eax
  movsbl %cl,%ecx
  lea    -0x30(%rcx,%rax,2),%eax
  movzbl (%rdi),%ecx
  test   %cl,%cl
  je     L99
  cmp    $0x2e,%cl
  jne    L76
L99:
  movzbl (%rsi),%edx
  test   %dl,%dl
  je     L20
  cmp    $0x2e,%dl
  je     L20
  mov    %r10d,%r8d
L135:
  add    $0x1,%rsi
  lea    (%r8,%r8,4),%r8d
  movsbl %dl,%edx
  lea    -0x30(%rdx,%r8,2),%r8d
  movzbl (%rsi),%edx
  test   %dl,%dl
  je     L121
  cmp    $0x2e,%dl
  jne    L135
  jmp    L121
L112:
  sub    %r8d,%eax
  ret
L81:
  mov    $0x1,%eax
  ret
L41:
  neg    %dl
  sbb    %eax,%eax
  ret
L38:
  mov    %r10d,%eax
  jmp    L99
L79:
  mov    $0x0,%eax
  ret
```

assistant: ```c
int compare_hostnames(char *pa, char *pb) {
  int i;
  for (i = 0; i < 4; i++) {
    int ia = 0, ib = 0;
    while ((*pa) && (*pa != '.'))
      ia = ia * 10 + *pa++ - '0';
    while ((*pb) && (*pb != '.'))
      ib = ib * 10 + *pb++ - '0';
    if (ia != ib)
      return ia - ib;
    if (*pa)
      pa++;
    else if (*pb)
      return -1;
    else
      return 0;
    if (*pb)
      pb++;
    else
      return 1;
  }
  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
<compare_hostnames>:
  endbr64
  mov    $0x4,%r9d
L158:
  movsbl (%rdi),%edx
  cmp    $0x2e,%dl
  je     L28
  xor    %eax,%eax
  test   %dl,%dl
  je     L28
  nopl   0x0(%rax,%rax,1)
L127:
  add    $0x1,%rdi
  lea    (%rax,%rax,4),%eax
  lea    -0x30(%rdx,%rax,2),%eax
  movsbl (%rdi),%edx
  test   %dl,%dl
  je     L72
  cmp    $0x2e,%dl
  jne    L127
L72:
  movsbl (%rsi),%ecx
  test   %cl,%cl
  je     L20
  cmp    $0x2e,%cl
  je     L20
L19:
  xor    %r8d,%r8d
  cs nopw 0x0(%rax,%rax,1)
L74:
  add    $0x1,%rsi
  lea    (%r8,%r8,4),%r8d
  lea    -0x30(%rcx,%r8,2),%r8d
  movsbl (%rsi),%ecx
  test   %cl,%cl
  je     L63
  cmp    $0x2e,%cl
  jne    L74
L63:
  cmp    %r8d,%eax
  jne    L97
L92:
  test   %dl,%dl
  je     L82
  add    $0x1,%rdi
  test   %cl,%cl
  je     L84
  add    $0x1,%rsi
  sub    $0x1,%r9d
  jne    L158
  xor    %eax,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L28:
  movsbl (%rsi),%ecx
  cmp    $0x2e,%cl
  je     L92
  xor    %eax,%eax
  test   %cl,%cl
  jne    L19
  jmp    L92
L20:
  xor    %r8d,%r8d
  jmp    L63
L97:
  sub    %r8d,%eax
  ret
L82:
  neg    %cl
  sbb    %eax,%eax
  ret
L84:
  mov    $0x1,%eax
  ret
```

assistant: ```c
int compare_hostnames(char *pa, char *pb) {
  int i;
  for (i = 0; i < 4; i++) {
    int ia = 0, ib = 0;
    while ((*pa) && (*pa != '.'))
      ia = ia * 10 + *pa++ - '0';
    while ((*pb) && (*pb != '.'))
      ib = ib * 10 + *pb++ - '0';
    if (ia != ib)
      return ia - ib;
    if (*pa)
      pa++;
    else if (*pb)
      return -1;
    else
      return 0;
    if (*pb)
      pb++;
    else
      return 1;
  }
  return 0;
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<compare_hostnames>:
  endbr64
  mov    $0x4,%r9d
L39:
  movsbl (%rdi),%edx
  cmp    $0x2e,%dl
  je     L141
  xor    %eax,%eax
  test   %dl,%dl
  je     L141
  nopl   0x0(%rax,%rax,1)
L45:
  add    $0x1,%rdi
  lea    (%rax,%rax,4),%eax
  lea    -0x30(%rdx,%rax,2),%eax
  movsbl (%rdi),%edx
  test   %dl,%dl
  je     L97
  cmp    $0x2e,%dl
  jne    L45
L97:
  movsbl (%rsi),%ecx
  test   %cl,%cl
  je     L23
  cmp    $0x2e,%cl
  je     L23
L38:
  xor    %r8d,%r8d
  cs nopw 0x0(%rax,%rax,1)
L80:
  add    $0x1,%rsi
  lea    (%r8,%r8,4),%r8d
  lea    -0x30(%rcx,%r8,2),%r8d
  movsbl (%rsi),%ecx
  test   %cl,%cl
  je     L46
  cmp    $0x2e,%cl
  jne    L80
L46:
  cmp    %eax,%r8d
  jne    L68
L72:
  test   %dl,%dl
  je     L31
  add    $0x1,%rdi
  test   %cl,%cl
  je     L26
  add    $0x1,%rsi
  sub    $0x1,%r9d
  jne    L39
  xor    %eax,%eax
  ret
  nopw   0x0(%rax,%rax,1)
L141:
  movsbl (%rsi),%ecx
  cmp    $0x2e,%cl
  je     L72
  xor    %eax,%eax
  test   %cl,%cl
  jne    L38
  jmp    L72
L23:
  xor    %r8d,%r8d
  jmp    L46
L68:
  sub    %r8d,%eax
  ret
L31:
  neg    %cl
  sbb    %eax,%eax
  ret
L26:
  mov    $0x1,%eax
  ret
```

assistant: ```c
int compare_hostnames(char *pa, char *pb) {
  int i;
  for (i = 0; i < 4; i++) {
    int ia = 0, ib = 0;
    while ((*pa) && (*pa != '.'))
      ia = ia * 10 + *pa++ - '0';
    while ((*pb) && (*pb != '.'))
      ib = ib * 10 + *pb++ - '0';
    if (ia != ib)
      return ia - ib;
    if (*pa)
      pa++;
    else if (*pb)
      return -1;
    else
      return 0;
    if (*pb)
      pb++;
    else
      return 1;
  }
  return 0;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<skipwhite>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x10,%rsp
  mov    %rdi,-0x8(%rbp)
  jmp    L1
L13:
  addq   $0x1,-0x8(%rbp)
L1:
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L42
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  movsbl %al,%eax
  mov    %eax,%edi
  call   <isspace@plt>
  test   %rax,%rax
  jne    L13
L42:
  mov    -0x8(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  je     L11
  mov    -0x8(%rbp),%rax
  jmp    L8
L11:
  mov    $0x0,%eax
L8:
  leave
  ret
```

assistant: ```c
char *skipwhite(char *s) {
  while (*s && isspace(*s))
    s++;
  return *s ? s : NULL;
}
```
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<skipwhite>:
  endbr64
  push   %rbx
  mov    %rdi,%rbx
  movzbl (%rdi),%edi
  test   %dil,%dil
  je     L0
L34:
  movsbl %dil,%edi
  call   <isspace@plt>
  test   %rax,%rax
  je     L26
  add    $0x1,%rbx
  movzbl (%rbx),%edi
  test   %dil,%dil
  jne    L34
L0:
  mov    $0x0,%eax
  jmp    L11
L26:
  cmpb   $0x0,(%rbx)
  cmovne %rbx,%rax
L11:
  pop    %rbx
  ret
```

assistant: ```c
char *skipwhite(char *s) {
  while (*s && isspace(*s))
    s++;
  return *s ? s : NULL;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<skipwhite>:
  endbr64
  push   %r12
  mov    %rdi,%r12
  movsbl (%rdi),%edi
  test   %dil,%dil
  jne    L36
  jmp    L24
  nopl   0x0(%rax,%rax,1)
L1:
  movsbl 0x1(%r12),%edi
  add    $0x1,%r12
  test   %dil,%dil
  je     L24
L36:
  call   <isspace@plt>
  test   %rax,%rax
  jne    L1
  cmpb   $0x0,(%r12)
  je     L24
  mov    %r12,%rax
  pop    %r12
  ret
  xchg   %ax,%ax
L24:
  xor    %r12d,%r12d
  mov    %r12,%rax
  pop    %r12
  ret
```

assistant: ```c
char *skipwhite(char *s) {
  while (*s && isspace(*s))
    s++;
  return *s ? s : NULL;
}
```
user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<skipwhite>:
  endbr64
  push   %r12
  mov    %rdi,%r12
  movsbl (%rdi),%edi
  test   %dil,%dil
  jne    L44
  jmp    L16
  nopl   0x0(%rax,%rax,1)
L42:
  movsbl 0x1(%r12),%edi
  add    $0x1,%r12
  test   %dil,%dil
  je     L16
L44:
  call   <isspace@plt>
  test   %rax,%rax
  jne    L42
  cmpb   $0x0,(%r12)
  je     L16
  mov    %r12,%rax
  pop    %r12
  ret
  xchg   %ax,%ax
L16:
  xor    %r12d,%r12d
  mov    %r12,%rax
  pop    %r12
  ret
```

assistant: ```c
char *skipwhite(char *s) {
  while (*s && isspace(*s))
    s++;
  return *s ? s : NULL;
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  movq   $0xb0000,-0x8(%rbp)
  movl   $0x0,-0x1c(%rbp)
  movl   $0x0,-0x18(%rbp)
  movl   $0x1,-0x14(%rbp)
  movl   $0x1,-0x10(%rbp)
  movl   $0x0,-0xc(%rbp)
  mov    -0x18(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  add    %eax,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movb   $0x48,(%rax)
  mov    -0x18(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movb   $0xf,(%rax)
L56:
  mov    -0x14(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x10(%rbp),%eax
  add    %eax,-0x18(%rbp)
  cmpl   $0x4f,-0x1c(%rbp)
  jne    L24
  movl   $0xffffffff,-0x14(%rbp)
L24:
  cmpl   $0x0,-0x1c(%rbp)
  jne    L23
  movl   $0x1,-0x14(%rbp)
L23:
  cmpl   $0x18,-0x18(%rbp)
  jne    L55
  movl   $0xffffffff,-0x10(%rbp)
L55:
  cmpl   $0x0,-0x18(%rbp)
  jne    L39
  movl   $0x1,-0x10(%rbp)
L39:
  mov    -0x18(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  add    %eax,%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movb   $0x48,(%rax)
  mov    -0x18(%rbp),%edx
  mov    %edx,%eax
  shl    $0x2,%eax
  add    %edx,%eax
  shl    $0x4,%eax
  mov    %eax,%edx
  mov    -0x1c(%rbp),%eax
  add    %edx,%eax
  add    %eax,%eax
  cltq
  lea    0x1(%rax),%rdx
  mov    -0x8(%rbp),%rax
  add    %rdx,%rax
  movb   $0xf,(%rax)
  movl   $0x0,-0xc(%rbp)
  jmp    L32
L64:
  addl   $0x1,-0xc(%rbp)
L32:
  cmpl   $0x1f3,-0xc(%rbp)
  jle    L64
  jmp    L56
```

assistant: ```c
int main() {
  unsigned char *vga_mem = (unsigned char *)(0xb0000);
  int x = 0, y = 0, xinc = 1, yinc = 1;
  int pause = 0;
  vga_mem[2 * x + 2 * y * 80] = 'H';
  vga_mem[2 * x + 2 * y * 80 + 1] = 15;
  while (1) {
    x += xinc;
    y += yinc;
    if (x == 80 - 1)
      xinc = -1;
    if (x == 0)
      xinc = 1;
    if (y == 25 - 1)
      yinc = -1;
    if (y == 0)
      yinc = 1;
    vga_mem[2 * x + 2 * y * 80] = 'H';
    vga_mem[2 * x + 2 * y * 80 + 1] = 15;
    for (pause = 0; pause < 500; pause++)
      ;
  }
}
```