ylfeng/ReF-Decompile-dataset huggingface dataset:
user: Please show me the C implementation that matches the assembly code listed below:

```asm
<sdram_no_memory>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  lea    D9(%rip),%rax
  mov    %rax,%rdi
  call   <print_err@plt>
L7:
  mov    $0x0,%eax
  call   <hlt@plt>
  jmp    L7
```

tool_calls: name: extract_symbolic_data
arguments: data_label: D9
type_infered: string

tool: D9: No memory!!


assistant: ```c
void sdram_no_memory(void) {
  print_err("No memory!!\r\n");
  while (1) {
    hlt();
  }
}
```
user: 下面的汇编指令对应的C源代码是什么:

```asm
<sdram_no_memory>:
  endbr64
  sub    $0x8,%rsp
  lea    D4(%rip),%rdi
  call   <print_err@plt>
L3:
  mov    $0x0,%eax
  call   <hlt@plt>
  jmp    L3
```

tool_calls: name: retrieve_data
arguments: label: D4
datatype: string

tool: D4: No memory!!


assistant: ```c
void sdram_no_memory(void) {
  print_err("No memory!!\r\n");
  while (1) {
    hlt();
  }
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<sdram_no_memory>:
  endbr64
  sub    $0x8,%rsp
  lea    D7(%rip),%rdi
  call   <print_err@plt>
  nopl   0x0(%rax)
L4:
  xor    %eax,%eax
  call   <hlt@plt>
  jmp    L4
```

tool_calls: name: read_data
arguments: tag: D7
data_type: string

tool: D7: No memory!!


assistant: ```c
void sdram_no_memory(void) {
  print_err("No memory!!\r\n");
  while (1) {
    hlt();
  }
}
```
user: Translate the below assembly code into C programming language:

```asm
<sdram_no_memory>:
  endbr64
  sub    $0x8,%rsp
  lea    D2(%rip),%rdi
  call   <print_err@plt>
  nopl   0x0(%rax)
L7:
  xor    %eax,%eax
  call   <hlt@plt>
  jmp    L7
```

tool_calls: name: parse_data
arguments: data_tag: D2
type: string

tool: D2: No memory!!


assistant: ```c
void sdram_no_memory(void) {
  print_err("No memory!!\r\n");
  while (1) {
    hlt();
  }
}
```
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
  sub    $0x20,%rsp
  mov    %edi,-0x14(%rbp)
  mov    %rsi,-0x20(%rbp)
  movl   $0x0,-0x4(%rbp)
  mov    $0x1,%edi
  call   <func1@plt>
  mov    %eax,-0x4(%rbp)
  mov    $0x0,%eax
  leave
  ret
```

assistant: ```c
int main(int argc, char **argv) {
  int ret = 0;
  ret = func1(1);
  return 0;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  mov    $0x1,%edi
  call   <func1@plt>
  mov    $0x0,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char **argv) {
  int ret = 0;
  ret = func1(1);
  return 0;
}
```
user: 这段汇编代码用C语言表示是什么样的？

```asm
<main>:
  endbr64
  sub    $0x8,%rsp
  mov    $0x1,%edi
  call   <func1@plt>
  xor    %eax,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char **argv) {
  int ret = 0;
  ret = func1(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
<main>:
  endbr64
  sub    $0x8,%rsp
  mov    $0x1,%edi
  call   <func1@plt>
  xor    %eax,%eax
  add    $0x8,%rsp
  ret
```

assistant: ```c
int main(int argc, char **argv) {
  int ret = 0;
  ret = func1(1);
  return 0;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<init_out_lens>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    %edx,-0x24(%rbp)
  mov    %ecx,-0x28(%rbp)
  mov    -0x20(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x28(%rbp),%eax
  cltq
  add    %rax,%rdx
  mov    -0x18(%rbp),%rax
  mov    (%rax),%rax
  sub    $0x1,%rdx
  mov    %rdx,(%rax)
  movl   $0x1,-0x4(%rbp)
  jmp    L5
L7:
  mov    -0x18(%rbp),%rax
  mov    (%rax),%rdx
  mov    -0x4(%rbp),%eax
  cltq
  shl    $0x3,%rax
  sub    $0x8,%rax
  add    %rdx,%rax
  mov    (%rax),%rcx
  mov    -0x4(%rbp),%eax
  cltq
  lea    0x0(,%rax,8),%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    -0x4(%rbp),%edx
  movslq %edx,%rdx
  shl    $0x3,%rdx
  lea    -0x8(%rdx),%rsi
  mov    -0x20(%rbp),%rdx
  add    %rsi,%rdx
  mov    (%rdx),%rdx
  sub    %rdx,%rax
  lea    (%rcx,%rax,1),%rdx
  mov    -0x28(%rbp),%eax
  cltq
  add    %rax,%rdx
  mov    -0x18(%rbp),%rax
  mov    (%rax),%rcx
  mov    -0x4(%rbp),%eax
  cltq
  shl    $0x3,%rax
  add    %rcx,%rax
  sub    $0x1,%rdx
  mov    %rdx,(%rax)
  addl   $0x1,-0x4(%rbp)
L5:
  mov    -0x4(%rbp),%eax
  cmp    -0x24(%rbp),%eax
  jl     L7
  nop
  nop
  pop    %rbp
  ret
```

assistant: ```c
void init_out_lens(long **out_lens, long *lens, int b_size, int kern_w) {
  (*out_lens)[0] = (lens[0] + kern_w - 1);
  for (int i = 1; i < b_size; i++) {
    (*out_lens)[i] = (*out_lens)[i - 1] + (lens[i] - lens[i - 1]) + kern_w - 1;
  }
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<init_out_lens>:
  endbr64
  mov    %rdi,%r9
  mov    %rsi,%rdi
  movslq %ecx,%r8
  mov    (%r9),%rcx
  mov    %r8,%rax
  add    (%rsi),%rax
  sub    $0x1,%rax
  mov    %rax,(%rcx)
  cmp    $0x1,%edx
  jle    L18
  lea    -0x1(%rdx),%r10d
  shl    $0x3,%r10
  mov    $0x0,%edx
L8:
  mov    (%r9),%rsi
  mov    %rdx,%rcx
  add    $0x8,%rdx
  mov    0x8(%rdi,%rcx,1),%rax
  sub    (%rdi,%rcx,1),%rax
  add    (%rsi,%rcx,1),%rax
  lea    -0x1(%r8,%rax,1),%rax
  mov    %rax,(%rsi,%rdx,1)
  cmp    %r10,%rdx
  jne    L8
L18:
  ret
```

assistant: ```c
void init_out_lens(long **out_lens, long *lens, int b_size, int kern_w) {
  (*out_lens)[0] = (lens[0] + kern_w - 1);
  for (int i = 1; i < b_size; i++) {
    (*out_lens)[i] = (*out_lens)[i - 1] + (lens[i] - lens[i - 1]) + kern_w - 1;
  }
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<init_out_lens>:
  endbr64
  mov    (%rsi),%rax
  movslq %ecx,%rcx
  mov    (%rdi),%r8
  add    %rcx,%rax
  sub    $0x1,%rax
  mov    %rax,(%r8)
  cmp    $0x1,%edx
  jle    L2
  lea    -0x2(%rdx),%edi
  xor    %edx,%edx
  shl    $0x3,%rdi
  jmp    L27
  nopw   0x0(%rax,%rax,1)
L21:
  add    $0x8,%rdx
L27:
  add    0x8(%rsi,%rdx,1),%rax
  sub    (%rsi,%rdx,1),%rax
  lea    -0x1(%rcx,%rax,1),%rax
  mov    %rax,0x8(%r8,%rdx,1)
  cmp    %rdi,%rdx
  jne    L21
L2:
  ret
```

assistant: ```c
void init_out_lens(long **out_lens, long *lens, int b_size, int kern_w) {
  (*out_lens)[0] = (lens[0] + kern_w - 1);
  for (int i = 1; i < b_size; i++) {
    (*out_lens)[i] = (*out_lens)[i - 1] + (lens[i] - lens[i - 1]) + kern_w - 1;
  }
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<init_out_lens>:
  endbr64
  mov    (%rsi),%rax
  movslq %ecx,%rcx
  mov    (%rdi),%r8
  add    %rcx,%rax
  sub    $0x1,%rax
  mov    %rax,(%r8)
  cmp    $0x1,%edx
  jle    L15
  movslq %edx,%rdx
  mov    $0x1,%edi
  nopl   0x0(%rax)
L5:
  add    (%rsi,%rdi,8),%rax
  sub    -0x8(%rsi,%rdi,8),%rax
  lea    -0x1(%rcx,%rax,1),%rax
  mov    %rax,(%r8,%rdi,8)
  add    $0x1,%rdi
  cmp    %rdi,%rdx
  jne    L5
L15:
  ret
```

assistant: ```c
void init_out_lens(long **out_lens, long *lens, int b_size, int kern_w) {
  (*out_lens)[0] = (lens[0] + kern_w - 1);
  for (int i = 1; i < b_size; i++) {
    (*out_lens)[i] = (*out_lens)[i - 1] + (lens[i] - lens[i - 1]) + kern_w - 1;
  }
}
```
user: 请将这段汇编代码片段转换成等效的C代码：

```asm
<bitSqrt>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %edi,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  je     L38
  cmpl   $0x1,-0x14(%rbp)
  jne    L22
L38:
  mov    -0x14(%rbp),%eax
  jmp    L32
L22:
  movl   $0x0,-0xc(%rbp)
  jmp    L66
L40:
  addl   $0x1,-0xc(%rbp)
L66:
  mov    -0xc(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  movslq %eax,%rdx
  mov    -0xc(%rbp),%eax
  mov    $0x1,%esi
  mov    %eax,%ecx
  shl    %cl,%esi
  mov    %esi,%eax
  cltq
  imul   %rax,%rdx
  mov    -0x14(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jle    L40
  subl   $0x1,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  sub    $0x1,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0xc(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  mov    %eax,-0x4(%rbp)
  jmp    L13
L42:
  mov    -0x8(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  or     -0x4(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x8(%rbp),%eax
  mov    $0x1,%esi
  mov    %eax,%ecx
  shl    %cl,%esi
  mov    %esi,%eax
  or     -0x4(%rbp),%eax
  cltq
  imul   %rax,%rdx
  mov    -0x14(%rbp),%eax
  cltq
  cmp    %rax,%rdx
  jg     L78
  mov    -0x8(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  or     %eax,-0x4(%rbp)
L78:
  subl   $0x1,-0x8(%rbp)
L13:
  cmpl   $0x0,-0x8(%rbp)
  jns    L42
  mov    -0x4(%rbp),%eax
L32:
  pop    %rbp
  ret
```

assistant: ```c
int bitSqrt(int x) {
  if (x == 0 || x == 1)
    return x;
  int h = 0;
  while ((long)(1 << h) * (long)(1 << h) <= x)
    h++;
  h--;
  int d = h - 1;
  int res = (1 << h);
  while (d >= 0) {
    if ((long)(res | 1 << d) * (long)(res | 1 << d) <= x)
      res |= (1 << d);
    d--;
  }
  return res;
}
```
user: Translate the below assembly code into C programming language:

```asm
<bitSqrt>:
  endbr64
  mov    %edi,%eax
  cmp    $0x1,%edi
  jbe    L19
  movslq %edi,%rdi
  test   %rdi,%rdi
  jle    L37
  mov    $0x0,%ecx
  mov    $0x1,%esi
L39:
  mov    %ecx,%edx
  add    $0x1,%ecx
  mov    %esi,%eax
  shl    %cl,%eax
  cltq
  imul   %rax,%rax
  cmp    %rdi,%rax
  jle    L39
  mov    $0x1,%eax
  mov    %edx,%ecx
  shl    %cl,%eax
  sub    $0x1,%edx
  mov    %edx,%ecx
  js     L19
L33:
  mov    %eax,%esi
  bts    %ecx,%esi
  movslq %esi,%rdx
  imul   %rdx,%rdx
  cmp    %rdi,%rdx
  cmovle %esi,%eax
  sub    $0x1,%ecx
  cmp    $0xffffffff,%ecx
  jne    L33
  ret
L37:
  mov    $0x1,%eax
  mov    $0xffffffff,%ecx
  shl    %cl,%eax
L19:
  ret
```

assistant: ```c
int bitSqrt(int x) {
  if (x == 0 || x == 1)
    return x;
  int h = 0;
  while ((long)(1 << h) * (long)(1 << h) <= x)
    h++;
  h--;
  int d = h - 1;
  int res = (1 << h);
  while (d >= 0) {
    if ((long)(res | 1 << d) * (long)(res | 1 << d) <= x)
      res |= (1 << d);
    d--;
  }
  return res;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<bitSqrt>:
  endbr64
  mov    %edi,%eax
  cmp    $0x1,%edi
  jbe    L23
  movslq %edi,%rdi
  test   %rdi,%rdi
  jle    L26
  xor    %ecx,%ecx
  mov    $0x1,%eax
  nopw   0x0(%rax,%rax,1)
L16:
  mov    %ecx,%r8d
  mov    %eax,%edx
  add    $0x1,%ecx
  shl    %cl,%edx
  movslq %edx,%rdx
  imul   %rdx,%rdx
  cmp    %rdi,%rdx
  jle    L16
  mov    %r8d,%ecx
  lea    -0x1(%r8),%esi
  shl    %cl,%eax
  test   %r8d,%r8d
  je     L23
  nopl   0x0(%rax)
L37:
  mov    %eax,%ecx
  bts    %esi,%ecx
  movslq %ecx,%rdx
  imul   %rdx,%rdx
  cmp    %rdi,%rdx
  cmovle %ecx,%eax
  sub    $0x1,%esi
  jae    L37
  ret
L26:
  mov    $0x1,%eax
  mov    $0xffffffff,%ecx
  shl    %cl,%eax
L23:
  ret
```

assistant: ```c
int bitSqrt(int x) {
  if (x == 0 || x == 1)
    return x;
  int h = 0;
  while ((long)(1 << h) * (long)(1 << h) <= x)
    h++;
  h--;
  int d = h - 1;
  int res = (1 << h);
  while (d >= 0) {
    if ((long)(res | 1 << d) * (long)(res | 1 << d) <= x)
      res |= (1 << d);
    d--;
  }
  return res;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<bitSqrt>:
  endbr64
  mov    %edi,%eax
  cmp    $0x1,%edi
  jbe    L29
  movslq %edi,%rdi
  test   %rdi,%rdi
  jle    L40
  xor    %ecx,%ecx
  mov    $0x1,%eax
  nopw   0x0(%rax,%rax,1)
L6:
  mov    %ecx,%r8d
  mov    %eax,%edx
  add    $0x1,%ecx
  shl    %cl,%edx
  movslq %edx,%rdx
  imul   %rdx,%rdx
  cmp    %rdi,%rdx
  jle    L6
  mov    %r8d,%ecx
  lea    -0x1(%r8),%esi
  shl    %cl,%eax
  test   %r8d,%r8d
  je     L29
  nopl   0x0(%rax)
L49:
  mov    %eax,%ecx
  bts    %esi,%ecx
  movslq %ecx,%rdx
  imul   %rdx,%rdx
  cmp    %rdx,%rdi
  cmovge %ecx,%eax
  sub    $0x1,%esi
  jae    L49
  ret
L40:
  mov    $0x1,%eax
  mov    $0xffffffff,%ecx
  shl    %cl,%eax
L29:
  ret
```

assistant: ```c
int bitSqrt(int x) {
  if (x == 0 || x == 1)
    return x;
  int h = 0;
  while ((long)(1 << h) * (long)(1 << h) <= x)
    h++;
  h--;
  int d = h - 1;
  int res = (1 << h);
  while (d >= 0) {
    if ((long)(res | 1 << d) * (long)(res | 1 << d) <= x)
      res |= (1 << d);
    d--;
  }
  return res;
}
```
user: Translate the below assembly code into C programming language:

```asm
<ft_preformat4>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    -0x18(%rbp),%rax
  add    $0x10,%rax
  mov    (%rax),%eax
  test   %eax,%eax
  jne    L70
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  cmp    %eax,-0x1c(%rbp)
  jge    L70
  movl   $0xffffffff,-0x4(%rbp)
  jmp    L1
L67:
  mov    -0x18(%rbp),%rax
  add    $0xc,%rax
  mov    (%rax),%eax
  test   %eax,%eax
  je     L52
  mov    -0x18(%rbp),%rax
  add    $0x4,%rax
  mov    (%rax),%eax
  cmp    $0xffffffff,%eax
  jne    L52
  mov    $0x30,%edi
  call   <ft_putchar@plt>
  jmp    L1
L52:
  mov    $0x20,%edi
  call   <ft_putchar@plt>
L1:
  addl   $0x1,-0x4(%rbp)
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  sub    -0x1c(%rbp),%eax
  cmp    %eax,-0x4(%rbp)
  jl     L67
  mov    -0x18(%rbp),%rax
  mov    (%rax),%eax
  sub    -0x1c(%rbp),%eax
  jmp    L60
L70:
  mov    $0x0,%eax
L60:
  leave
  ret
```

assistant: ```c
int ft_preformat4(int fl[8], int len) {
  int index;
  if (!fl[4] && fl[0] > len) {
    index = -1;
    while (++index < fl[0] - len)
      (fl[3] && fl[1] == -1) ? ft_putchar('0') : ft_putchar(' ');
    return (fl[0] - len);
  }
  return (0);
}
```
user: What is the c source code of the assembly code below?

```asm
<ft_preformat4>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    0x10(%rdi),%ebp
  test   %ebp,%ebp
  jne    L23
  mov    %rdi,%rbx
  mov    %esi,%r12d
  cmp    %esi,(%rdi)
  jle    L73
  jmp    L66
L7:
  mov    $0x20,%edi
  call   <ft_putchar@plt>
L60:
  add    $0x1,%ebp
  mov    (%rbx),%eax
  sub    %r12d,%eax
  cmp    %ebp,%eax
  jle    L50
L66:
  cmpl   $0x0,0xc(%rbx)
  je     L7
  cmpl   $0xffffffff,0x4(%rbx)
  jne    L7
  mov    $0x30,%edi
  call   <ft_putchar@plt>
  jmp    L60
L50:
  mov    %eax,%ebp
  jmp    L73
L23:
  mov    $0x0,%ebp
L73:
  mov    %ebp,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
int ft_preformat4(int fl[8], int len) {
  int index;
  if (!fl[4] && fl[0] > len) {
    index = -1;
    while (++index < fl[0] - len)
      (fl[3] && fl[1] == -1) ? ft_putchar('0') : ft_putchar(' ');
    return (fl[0] - len);
  }
  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
<ft_preformat4>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    0x10(%rdi),%r12d
  test   %r12d,%r12d
  jne    L0
  mov    %rdi,%rbx
  mov    %esi,%ebp
  cmp    %esi,(%rdi)
  jg     L9
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L28:
  mov    $0x20,%edi
  add    $0x1,%r12d
  call   <ft_putchar@plt>
  mov    (%rbx),%eax
  sub    %ebp,%eax
  cmp    %r12d,%eax
  jle    L26
L9:
  mov    0xc(%rbx),%eax
  test   %eax,%eax
  je     L28
  cmpl   $0xffffffff,0x4(%rbx)
  jne    L28
  mov    $0x30,%edi
  add    $0x1,%r12d
  call   <ft_putchar@plt>
  mov    (%rbx),%eax
  sub    %ebp,%eax
  cmp    %r12d,%eax
  jg     L9
L26:
  mov    %eax,%r12d
  pop    %rbx
  pop    %rbp
  mov    %r12d,%eax
  pop    %r12
  ret
  xchg   %ax,%ax
L0:
  xor    %r12d,%r12d
  pop    %rbx
  pop    %rbp
  mov    %r12d,%eax
  pop    %r12
  ret
```

assistant: ```c
int ft_preformat4(int fl[8], int len) {
  int index;
  if (!fl[4] && fl[0] > len) {
    index = -1;
    while (++index < fl[0] - len)
      (fl[3] && fl[1] == -1) ? ft_putchar('0') : ft_putchar(' ');
    return (fl[0] - len);
  }
  return (0);
}
```
user: 请从给定的汇编指令推导出C源代码:

```asm
<ft_preformat4>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    0x10(%rdi),%r12d
  test   %r12d,%r12d
  jne    L46
  mov    %rdi,%rbx
  mov    %esi,%ebp
  cmp    %esi,(%rdi)
  jg     L48
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopw   0x0(%rax,%rax,1)
L38:
  mov    $0x20,%edi
  add    $0x1,%r12d
  call   <ft_putchar@plt>
  mov    (%rbx),%eax
  sub    %ebp,%eax
  cmp    %r12d,%eax
  jle    L1
L48:
  mov    0xc(%rbx),%eax
  test   %eax,%eax
  je     L38
  cmpl   $0xffffffff,0x4(%rbx)
  jne    L38
  mov    $0x30,%edi
  add    $0x1,%r12d
  call   <ft_putchar@plt>
  mov    (%rbx),%eax
  sub    %ebp,%eax
  cmp    %r12d,%eax
  jg     L48
L1:
  mov    %eax,%r12d
  pop    %rbx
  pop    %rbp
  mov    %r12d,%eax
  pop    %r12
  ret
  xchg   %ax,%ax
L46:
  xor    %r12d,%r12d
  pop    %rbx
  pop    %rbp
  mov    %r12d,%eax
  pop    %r12
  ret
```

assistant: ```c
int ft_preformat4(int fl[8], int len) {
  int index;
  if (!fl[4] && fl[0] > len) {
    index = -1;
    while (++index < fl[0] - len)
      (fl[3] && fl[1] == -1) ? ft_putchar('0') : ft_putchar(' ');
    return (fl[0] - len);
  }
  return (0);
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<write_zero>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %edi,-0x24(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    -0x30(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  jmp    L40
L48:
  movb   $0x0,-0x11(%rbp)
  lea    -0x11(%rbp),%rcx
  mov    -0x24(%rbp),%eax
  mov    $0x1,%edx
  mov    %rcx,%rsi
  mov    %eax,%edi
  call   <do_write@plt>
  test   %rax,%rax
  jns    L40
  mov    $0xffffffff,%eax
  jmp    L30
L40:
  mov    -0x10(%rbp),%rax
  lea    -0x1(%rax),%rdx
  mov    %rdx,-0x10(%rbp)
  test   %rax,%rax
  jne    L48
  mov    -0x30(%rbp),%rax
L30:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L35
  call   <__stack_chk_fail@plt>
L35:
  leave
  ret
```

assistant: ```c
ssize_t write_zero(int fd, size_t len) {
  size_t i = len;
  while (i--) {
    const char x = 0;
    if (do_write(fd, &x, 1) < 0)
      return -1;
  }
  return len;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<write_zero>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %rsi,%r13
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  test   %rsi,%rsi
  je     L21
  mov    %edi,%ebp
  lea    -0x1(%rsi),%rbx
  lea    0x7(%rsp),%r12
L35:
  movb   $0x0,0x7(%rsp)
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %ebp,%edi
  call   <do_write@plt>
  test   %rax,%rax
  js     L25
  sub    $0x1,%rbx
  cmp    $0xffffffffffffffff,%rbx
  jne    L35
L21:
  mov    %r13d,%eax
L28:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L46
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L25:
  mov    $0xffffffff,%eax
  jmp    L28
L46:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
ssize_t write_zero(int fd, size_t len) {
  size_t i = len;
  while (i--) {
    const char x = 0;
    if (do_write(fd, &x, 1) < 0)
      return -1;
  }
  return len;
}
```
user: 请将以下的汇编代码转换成C语言代码:

```asm
<write_zero>:
  endbr64
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  test   %rsi,%rsi
  je     L1
  mov    %edi,%ebp
  lea    -0x1(%rsi),%rbx
  lea    0x7(%rsp),%r12
  jmp    L49
  nopl   0x0(%rax,%rax,1)
L39:
  sub    $0x1,%rbx
  jb     L1
L49:
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %ebp,%edi
  movb   $0x0,0x7(%rsp)
  call   <do_write@plt>
  test   %rax,%rax
  jns    L39
  mov    $0xffffffff,%eax
  jmp    L57
  xchg   %ax,%ax
L1:
  mov    %r13d,%eax
L57:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L50
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L50:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
ssize_t write_zero(int fd, size_t len) {
  size_t i = len;
  while (i--) {
    const char x = 0;
    if (do_write(fd, &x, 1) < 0)
      return -1;
  }
  return len;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<write_zero>:
  endbr64
  push   %r13
  mov    %rsi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  test   %rsi,%rsi
  je     L4
  mov    %edi,%ebp
  lea    -0x1(%rsi),%rbx
  lea    0x7(%rsp),%r12
  jmp    L39
  nopl   0x0(%rax,%rax,1)
L16:
  sub    $0x1,%rbx
  jb     L4
L39:
  mov    $0x1,%edx
  mov    %r12,%rsi
  mov    %ebp,%edi
  movb   $0x0,0x7(%rsp)
  call   <do_write@plt>
  test   %rax,%rax
  jns    L16
  mov    $0xffffffff,%eax
  jmp    L10
  xchg   %ax,%ax
L4:
  mov    %r13d,%eax
L10:
  mov    0x8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L53
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L53:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
ssize_t write_zero(int fd, size_t len) {
  size_t i = len;
  while (i--) {
    const char x = 0;
    if (do_write(fd, &x, 1) < 0)
      return -1;
  }
  return len;
}
```
user: 下面的汇编指令对应的C源代码是什么：

```asm
<env_var_prefix_match>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x10(%rbp),%rdx
  mov    -0x20(%rbp),%rcx
  mov    -0x18(%rbp),%rax
  mov    %rcx,%rsi
  mov    %rax,%rdi
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L8
  mov    -0x18(%rbp),%rdx
  mov    -0x10(%rbp),%rax
  add    %rdx,%rax
  mov    $0x3d,%esi
  mov    %rax,%rdi
  call   <strchr@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L8
  mov    -0x8(%rbp),%rax
  add    $0x1,%rax
  jmp    L12
L8:
  mov    $0x0,%eax
L12:
  leave
  ret
```

assistant: ```c
char *env_var_prefix_match(char *env_str, const char *prefix) {
  size_t prefix_len = strlen(prefix);
  if (strncmp(env_str, prefix, prefix_len) == 0) {
    char *match = strchr(env_str + prefix_len, '=');
    if (match != NULL) {
      return match + 1;
    }
  }
  return NULL;
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<env_var_prefix_match>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  mov    %rsi,%rdi
  call   <strlen@plt>
  mov    %rax,%r12
  mov    %rax,%rdx
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  call   <strncmp@plt>
  mov    %rax,%rdx
  mov    $0x0,%eax
  test   %rdx,%rdx
  jne    L5
  lea    (%rbx,%r12,1),%rdi
  mov    $0x3d,%esi
  call   <strchr@plt>
  cmp    $0x1,%rax
  sbb    $0xffffffffffffffff,%rax
L5:
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
char *env_var_prefix_match(char *env_str, const char *prefix) {
  size_t prefix_len = strlen(prefix);
  if (strncmp(env_str, prefix, prefix_len) == 0) {
    char *match = strchr(env_str + prefix_len, '=');
    if (match != NULL) {
      return match + 1;
    }
  }
  return NULL;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<env_var_prefix_match>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    %rsi,%rdi
  call   <strlen@plt>
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  mov    %rax,%rdx
  mov    %rax,%r12
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L1
  lea    (%rbx,%r12,1),%rdi
  mov    $0x3d,%esi
  call   <strchr@plt>
  test   %rax,%rax
  je     L1
  pop    %rbx
  add    $0x1,%rax
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax,%rax,1)
L1:
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
char *env_var_prefix_match(char *env_str, const char *prefix) {
  size_t prefix_len = strlen(prefix);
  if (strncmp(env_str, prefix, prefix_len) == 0) {
    char *match = strchr(env_str + prefix_len, '=');
    if (match != NULL) {
      return match + 1;
    }
  }
  return NULL;
}
```
user: Converte this assembly snippet into its equivalent C code:

```asm
<env_var_prefix_match>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    %rsi,%rdi
  call   <strlen@plt>
  mov    %rbp,%rsi
  mov    %rbx,%rdi
  mov    %rax,%rdx
  mov    %rax,%r12
  call   <strncmp@plt>
  test   %rax,%rax
  jne    L3
  lea    (%rbx,%r12,1),%rdi
  mov    $0x3d,%esi
  call   <strchr@plt>
  test   %rax,%rax
  je     L3
  pop    %rbx
  add    $0x1,%rax
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax,%rax,1)
L3:
  pop    %rbx
  xor    %eax,%eax
  pop    %rbp
  pop    %r12
  ret
```

assistant: ```c
char *env_var_prefix_match(char *env_str, const char *prefix) {
  size_t prefix_len = strlen(prefix);
  if (strncmp(env_str, prefix, prefix_len) == 0) {
    char *match = strchr(env_str + prefix_len, '=');
    if (match != NULL) {
      return match + 1;
    }
  }
  return NULL;
}
```