ylfeng/ReF-Decompile-dataset huggingface dataset:
user: What would the C source look like for the assembly code provided here:

```asm
<main>:
  endbr64
  sub    $0x18,%rsp
  lea    D28(%rip),%rdi
  mov    %fs:0x28,%rax
  mov    %rax,0x8(%rsp)
  xor    %eax,%eax
  call   <printf@plt>
  lea    0x4(%rsp),%rsi
  lea    D0(%rip),%rdi
  call   <scanf@plt>
  mov    0x4(%rsp),%eax
  mov    %eax,%esi
  mov    %eax,%ecx
  mov    %eax,%edx
  mov    %eax,%edi
  imul   %eax,%esi
  imul   %esi,%ecx
  imul   %ecx,%edx
  lea    (%rcx,%rcx,4),%ecx
  imul   %edx,%edi
  lea    (%rdi,%rdi,2),%edi
  lea    (%rdi,%rdx,2),%edx
  lea    D1(%rip),%rdi
  sub    %ecx,%edx
  lea    0x0(,%rax,8),%ecx
  sub    %eax,%ecx
  sub    %esi,%edx
  xor    %eax,%eax
  lea    -0x6(%rdx,%rcx,1),%esi
  call   <printf@plt>
  mov    0x8(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L0
  xor    %eax,%eax
  add    $0x18,%rsp
  ret
L0:
  call   <__stack_chk_fail@plt>
```

tool_calls: name: read_data
arguments: data_label: D28
datatype: string
name: read_data
arguments: data_label: D0
datatype: string
name: read_data
arguments: data_label: D1
datatype: string

tool: D28: Enter x: 

tool: D0: %d

tool: D1: Result = %d


assistant: ```c
int main(void) {
  int x, result;
  printf("Enter x: ");
  scanf("%d", &x);
  result = (3 * (x * x * x * x * x)) + (2 * (x * x * x * x)) - (5 * (x * x * x)) - (x * x) + (7 * x) - 6;
  printf("Result = %d\n", result);
  return 0;
}
```
user: 请将以下的汇编代码转换成C语言代码：

```asm
<netlookup>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %rdi,-0x18(%rbp)
  mov    %rsi,-0x20(%rbp)
  mov    -0x20(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <parseip@plt>
  test   %rax,%rax
  js     L35
  mov    $0x0,%eax
  jmp    L9
L35:
  lea    D4(%rip),%rax
  mov    %rax,%rdi
  call   <taskState@plt>
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <gethostbyname@plt>
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L17
  mov    -0x8(%rbp),%rax
  mov    (%rax),%rax
  mov    (%rax),%edx
  mov    -0x20(%rbp),%rax
  mov    %edx,(%rax)
  lea    D6(%rip),%rax
  mov    %rax,%rdi
  call   <taskState@plt>
  mov    $0x0,%eax
  jmp    L9
L17:
  lea    D18(%rip),%rax
  mov    %rax,%rdi
  call   <taskState@plt>
  mov    $0xffffffff,%eax
L9:
  leave
  ret
```

tool_calls: name: read_data
arguments: tag: D4
type_guessed: string
name: read_data
arguments: tag: D6
type_guessed: string
name: read_data
arguments: tag: D18
type_guessed: string

tool: D4: netlookup

tool: D6: netlookup succeeded

tool: D18: netlookup failed

assistant: ```c
int netlookup(char *name, uint32_t *ip) {
  struct hostent *he;
  if (parseip(name, ip) >= 0)
    return 0;
  taskState("netlookup");
  if ((he = gethostbyname(name)) != 0) {
    *ip = *(uint32_t *)he->h_addr;
    taskState("netlookup succeeded");
    return 0;
  }
  taskState("netlookup failed");
  return -1;
}
```
user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<netlookup>:
  endbr64
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdi,%rbx
  mov    %rsi,%rbp
  call   <parseip@plt>
  mov    %rax,%rdx
  mov    $0x0,%eax
  test   %rdx,%rdx
  js     L27
L12:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  ret
L27:
  lea    D0(%rip),%rdi
  call   <taskState@plt>
  mov    %rbx,%rdi
  call   <gethostbyname@plt>
  test   %rax,%rax
  je     L2
  mov    (%rax),%rax
  mov    (%rax),%eax
  mov    %eax,0x0(%rbp)
  lea    D20(%rip),%rdi
  call   <taskState@plt>
  mov    $0x0,%eax
  jmp    L12
L2:
  lea    D23(%rip),%rdi
  call   <taskState@plt>
  mov    $0xffffffff,%eax
  jmp    L12
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D0
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D20
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D23
type_guessed: string

tool: D0: netlookup

tool: D20: netlookup succeeded

tool: D23: netlookup failed

assistant: ```c
int netlookup(char *name, uint32_t *ip) {
  struct hostent *he;
  if (parseip(name, ip) >= 0)
    return 0;
  taskState("netlookup");
  if ((he = gethostbyname(name)) != 0) {
    *ip = *(uint32_t *)he->h_addr;
    taskState("netlookup succeeded");
    return 0;
  }
  taskState("netlookup failed");
  return -1;
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<netlookup>:
  endbr64
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %rsi,%rbx
  call   <parseip@plt>
  test   %rax,%rax
  js     L21
L10:
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax,%rax,1)
L21:
  lea    D26(%rip),%rdi
  call   <taskState@plt>
  mov    %rbp,%rdi
  call   <gethostbyname@plt>
  test   %rax,%rax
  je     L24
  mov    (%rax),%rax
  lea    D12(%rip),%rdi
  mov    (%rax),%eax
  mov    %eax,(%rbx)
  call   <taskState@plt>
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L24:
  lea    D16(%rip),%rdi
  mov    $0xffffffff,%r12d
  call   <taskState@plt>
  jmp    L10
```

tool_calls: name: disassemble_data
arguments: data_label: D26
type: string
name: disassemble_data
arguments: data_label: D12
type: string
name: disassemble_data
arguments: data_label: D16
type: string

tool: D26: netlookup

tool: D12: netlookup succeeded

tool: D16: netlookup failed

assistant: ```c
int netlookup(char *name, uint32_t *ip) {
  struct hostent *he;
  if (parseip(name, ip) >= 0)
    return 0;
  taskState("netlookup");
  if ((he = gethostbyname(name)) != 0) {
    *ip = *(uint32_t *)he->h_addr;
    taskState("netlookup succeeded");
    return 0;
  }
  taskState("netlookup failed");
  return -1;
}
```
user: What is the c source code of the assembly code below?

```asm
<netlookup>:
  endbr64
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %rdi,%rbp
  push   %rbx
  mov    %rsi,%rbx
  call   <parseip@plt>
  test   %rax,%rax
  js     L7
L22:
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  nopl   0x0(%rax,%rax,1)
L7:
  lea    D16(%rip),%rdi
  call   <taskState@plt>
  mov    %rbp,%rdi
  call   <gethostbyname@plt>
  test   %rax,%rax
  je     L1
  mov    (%rax),%rax
  lea    D9(%rip),%rdi
  mov    (%rax),%eax
  mov    %eax,(%rbx)
  call   <taskState@plt>
  mov    %r12d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
L1:
  lea    D0(%rip),%rdi
  mov    $0xffffffff,%r12d
  call   <taskState@plt>
  jmp    L22
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D16
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D9
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D0
type_guessed: string

tool: D16: netlookup

tool: D9: netlookup succeeded

tool: D0: netlookup failed

assistant: ```c
int netlookup(char *name, uint32_t *ip) {
  struct hostent *he;
  if (parseip(name, ip) >= 0)
    return 0;
  taskState("netlookup");
  if ((he = gethostbyname(name)) != 0) {
    *ip = *(uint32_t *)he->h_addr;
    taskState("netlookup succeeded");
    return 0;
  }
  taskState("netlookup failed");
  return -1;
}
```
user: What would the C source look like for the assembly code provided here:

```asm
<createArr>:
  endbr64
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbp
  mov    %rsi,%rbx
  mov    (%rdx),%eax
  cmp    $0x3,%eax
  je     L89
  jg     L138
  cmp    $0x1,%eax
  je     L108
  cmp    $0x2,%eax
  jne    L130
  mov    $0x98967f,%edx
  mov    $0x0,%eax
  cmpl   $0x0,(%rsi)
  jle    L130
L86:
  mov    %edx,0x0(%rbp,%rax,4)
  add    $0x1,%rax
  sub    $0x3,%edx
  cmp    %eax,(%rbx)
  jg     L86
  jmp    L130
L138:
  cmp    $0x4,%eax
  jne    L130
  mov    $0x3a08,%edi
  call   <srandom@plt>
  cmpl   $0x0,(%rbx)
  jle    L130
  mov    $0x0,%r12d
L26:
  mov    $0x0,%eax
  call   <random@plt>
  movslq %eax,%rdx
  imul   $0x2419bc59,%rdx,%rdx
  sar    $0x2b,%rdx
  sar    $0x1f,%eax
  sub    %eax,%edx
  mov    %edx,0x0(%rbp,%r12,4)
  add    $0x1,%r12
  cmp    %r12d,(%rbx)
  jg     L26
  jmp    L130
L89:
  mov    $0x186a0,%esi
  mov    $0x2b6a,%ecx
  mov    $0x0,%edx
  cmpl   $0x0,(%rbx)
  jle    L130
L133:
  movslq %edx,%rax
  imul   $0x66666667,%rax,%rax
  sar    $0x21,%rax
  mov    %edx,%edi
  sar    $0x1f,%edi
  sub    %edi,%eax
  lea    (%rax,%rax,4),%eax
  cmp    %edx,%eax
  mov    %ecx,%eax
  cmovne %esi,%eax
  mov    %eax,0x0(%rbp,%rdx,4)
  add    $0x1,%rdx
  add    $0x21,%ecx
  add    $0x32,%esi
  cmp    %edx,(%rbx)
  jg     L133
  jmp    L130
L108:
  cmpl   $0x0,(%rsi)
  jle    L130
  mov    $0x186a0,%edx
  mov    $0x0,%eax
L154:
  mov    %edx,0x0(%rbp,%rax,4)
  add    $0x1,%rax
  add    $0x2b,%edx
  cmp    %eax,(%rbx)
  jg     L154
L130:
  lea    D3(%rip),%rdi
  call   <printf@plt>
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
```

tool_calls: name: parse_data
arguments: data_tag: D3
type_guessed: string

tool: D3: 
	List created!

assistant: ```c
void createArr(int arr[], int *len, int *mode) {
  int offset, i;
  switch (*mode) {
  case 1:
    offset = 100000;
    for (i = 0; i < *len; i++)
      arr[i] = offset + 43 * i;
    break;
  case 2:
    offset = 9999999;
    for (i = 0; i < *len; i++)
      arr[i] = offset - 3 * i;
    break;
  case 3:
    offset = 100000;
    for (i = 0; i < *len; i++) {
      if (i % 5 == 0)
        arr[i] = 11114 + 33 * i;
      else
        arr[i] = offset + 50 * i;
    }
    break;
  case 4:
    offset = 100000;
    srandom(14856);
    for (i = 0; i < *len; i++)
      arr[i] = random() / 14523;
    break;
  }
  printf("\n\tList created!");
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<createArr>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    (%rdx),%eax
  mov    %rdi,%rbx
  cmp    $0x3,%eax
  je     L34
  jg     L7
  cmp    $0x1,%eax
  je     L69
  cmp    $0x2,%eax
  jne    L90
  mov    (%rsi),%ecx
  mov    $0x98967f,%edx
  xor    %eax,%eax
  test   %ecx,%ecx
  jle    L90
  cs nopw 0x0(%rax,%rax,1)
L108:
  mov    %edx,(%rbx,%rax,4)
  add    $0x1,%rax
  sub    $0x3,%edx
  cmp    %eax,0x0(%rbp)
  jg     L108
L90:
  pop    %rbx
  lea    D14(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nop
L7:
  cmp    $0x4,%eax
  jne    L90
  mov    $0x3a08,%edi
  call   <srandom@plt>
  mov    0x0(%rbp),%eax
  test   %eax,%eax
  jle    L90
  xor    %r12d,%r12d
  nopl   0x0(%rax)
L33:
  xor    %eax,%eax
  call   <random@plt>
  movslq %eax,%rdx
  sar    $0x1f,%eax
  imul   $0x2419bc59,%rdx,%rdx
  sar    $0x2b,%rdx
  sub    %eax,%edx
  mov    %edx,(%rbx,%r12,4)
  add    $0x1,%r12
  cmp    %r12d,0x0(%rbp)
  jg     L33
  pop    %rbx
  lea    D14(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nopl   0x0(%rax,%rax,1)
L69:
  mov    (%rsi),%edx
  test   %edx,%edx
  jle    L90
  mov    $0x186a0,%edx
  xor    %eax,%eax
  nopl   (%rax)
L104:
  mov    %edx,(%rbx,%rax,4)
  add    $0x1,%rax
  add    $0x2b,%edx
  cmp    %eax,0x0(%rbp)
  jg     L104
  pop    %rbx
  lea    D14(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nop
L34:
  mov    (%rsi),%esi
  mov    $0x186a0,%ecx
  mov    $0x2b6a,%edx
  xor    %eax,%eax
  test   %esi,%esi
  jle    L90
  cs nopw 0x0(%rax,%rax,1)
L17:
  imul   $0xcccccccd,%eax,%esi
  cmp    $0x33333333,%esi
  mov    %edx,%esi
  cmova  %ecx,%esi
  add    $0x1,%eax
  add    $0x21,%edx
  add    $0x32,%ecx
  add    $0x4,%rbx
  mov    %esi,-0x4(%rbx)
  cmp    %eax,0x0(%rbp)
  jg     L17
  jmp    L90
```

tool_calls: name: read_data
arguments: label: D14
type_guessed: string

tool: D14: 
	List created!

assistant: ```c
void createArr(int arr[], int *len, int *mode) {
  int offset, i;
  switch (*mode) {
  case 1:
    offset = 100000;
    for (i = 0; i < *len; i++)
      arr[i] = offset + 43 * i;
    break;
  case 2:
    offset = 9999999;
    for (i = 0; i < *len; i++)
      arr[i] = offset - 3 * i;
    break;
  case 3:
    offset = 100000;
    for (i = 0; i < *len; i++) {
      if (i % 5 == 0)
        arr[i] = 11114 + 33 * i;
      else
        arr[i] = offset + 50 * i;
    }
    break;
  case 4:
    offset = 100000;
    srandom(14856);
    for (i = 0; i < *len; i++)
      arr[i] = random() / 14523;
    break;
  }
  printf("\n\tList created!");
}
```
user: 这段汇编代码用C语言表示是什么样的?

```asm
<createArr>:
  endbr64
  push   %r12
  push   %rbp
  mov    %rsi,%rbp
  push   %rbx
  mov    (%rdx),%eax
  mov    %rdi,%rbx
  cmp    $0x3,%eax
  je     L32
  jg     L14
  cmp    $0x1,%eax
  je     L35
  cmp    $0x2,%eax
  jne    L55
  mov    (%rsi),%ecx
  mov    $0x98967f,%edx
  xor    %eax,%eax
  test   %ecx,%ecx
  jle    L55
  cs nopw 0x0(%rax,%rax,1)
L139:
  mov    %edx,(%rbx,%rax,4)
  add    $0x1,%rax
  sub    $0x3,%edx
  cmp    %eax,0x0(%rbp)
  jg     L139
L55:
  pop    %rbx
  lea    D10(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nop
L14:
  cmp    $0x4,%eax
  jne    L55
  mov    $0x3a08,%edi
  call   <srandom@plt>
  mov    0x0(%rbp),%eax
  test   %eax,%eax
  jle    L55
  xor    %r12d,%r12d
  nopl   0x0(%rax)
L65:
  xor    %eax,%eax
  call   <random@plt>
  movslq %eax,%rdx
  sar    $0x1f,%eax
  imul   $0x2419bc59,%rdx,%rdx
  sar    $0x2b,%rdx
  sub    %eax,%edx
  mov    %edx,(%rbx,%r12,4)
  add    $0x1,%r12
  cmp    %r12d,0x0(%rbp)
  jg     L65
  pop    %rbx
  lea    D10(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nopl   0x0(%rax,%rax,1)
L35:
  mov    (%rsi),%edx
  test   %edx,%edx
  jle    L55
  mov    $0x186a0,%edx
  xor    %eax,%eax
  nopl   (%rax)
L54:
  mov    %edx,(%rbx,%rax,4)
  add    $0x1,%rax
  add    $0x2b,%edx
  cmp    %eax,0x0(%rbp)
  jg     L54
  pop    %rbx
  lea    D10(%rip),%rdi
  pop    %rbp
  pop    %r12
  jmp    1080 <printf@plt>
  nop
L32:
  mov    (%rsi),%esi
  mov    $0x2b6a,%ecx
  mov    $0x186a0,%edx
  xor    %eax,%eax
  test   %esi,%esi
  jle    L55
  cs nopw 0x0(%rax,%rax,1)
L96:
  imul   $0xcccccccd,%eax,%esi
  cmp    $0x33333333,%esi
  mov    %ecx,%esi
  cmova  %edx,%esi
  add    $0x1,%eax
  add    $0x32,%edx
  add    $0x21,%ecx
  add    $0x4,%rbx
  mov    %esi,-0x4(%rbx)
  cmp    %eax,0x0(%rbp)
  jg     L96
  jmp    L55
```

tool_calls: name: read_data
arguments: data_tag: D10
type_infered: string

tool: D10: 
	List created!

assistant: ```c
void createArr(int arr[], int *len, int *mode) {
  int offset, i;
  switch (*mode) {
  case 1:
    offset = 100000;
    for (i = 0; i < *len; i++)
      arr[i] = offset + 43 * i;
    break;
  case 2:
    offset = 9999999;
    for (i = 0; i < *len; i++)
      arr[i] = offset - 3 * i;
    break;
  case 3:
    offset = 100000;
    for (i = 0; i < *len; i++) {
      if (i % 5 == 0)
        arr[i] = 11114 + 33 * i;
      else
        arr[i] = offset + 50 * i;
    }
    break;
  case 4:
    offset = 100000;
    srandom(14856);
    for (i = 0; i < *len; i++)
      arr[i] = random() / 14523;
    break;
  }
  printf("\n\tList created!");
}
```
user: What is the c source code of the assembly code below:

```asm
<SDL_imageFilterMultDivby2>:
  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)
  cmpq   $0x0,-0x38(%rbp)
  je     L87
  cmpq   $0x0,-0x40(%rbp)
  je     L87
  cmpq   $0x0,-0x48(%rbp)
  jne    L84
L87:
  mov    $0xffffffff,%eax
  jmp    L90
L84:
  cmpl   $0x0,-0x4c(%rbp)
  jne    L5
  mov    $0x0,%eax
  jmp    L90
L5:
  mov    $0x0,%eax
  call   <SDL_imageFilterMMXdetect@plt>
  test   %rax,%rax
  je     L66
  cmpl   $0x7,-0x4c(%rbp)
  jbe    L66
  mov    -0x4c(%rbp),%ecx
  mov    -0x48(%rbp),%rdx
  mov    -0x40(%rbp),%rsi
  mov    -0x38(%rbp),%rax
  mov    %rax,%rdi
  call   <SDL_imageFilterMultDivby2MMX@plt>
  mov    -0x4c(%rbp),%eax
  and    $0x7,%eax
  test   %eax,%eax
  je     L11
  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    L0
L11:
  mov    $0x0,%eax
  jmp    L90
L66:
  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)
L0:
  mov    -0x20(%rbp),%eax
  mov    %eax,-0x24(%rbp)
  jmp    L88
L94:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  shr    %al
  movzbl %al,%edx
  mov    -0x10(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  mov    %eax,-0x1c(%rbp)
  cmpl   $0xff,-0x1c(%rbp)
  jle    L13
  movl   $0xff,-0x1c(%rbp)
L13:
  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)
L88:
  mov    -0x24(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jb     L94
  mov    $0x0,%eax
L90:
  leave
  ret
```

assistant: ```c
int SDL_imageFilterMultDivby2(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((Src1 == NULL) || (Src2 == NULL) || (Dest == NULL))
    return (-1);
  if (length == 0)
    return (0);
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterMultDivby2MMX(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 = ((int)*cursrc1 / 2) * (int)*cursrc2;
    if (result > 255)
      result = 255;
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```
user: What would the C source look like for the assembly code provided here?

```asm
<SDL_imageFilterMultDivby2>:
  endbr64
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    %rdx,%r12
  test   %rsi,%rsi
  sete   %al
  test   %rdx,%rdx
  sete   %dl
  or     %dl,%al
  jne    L39
  mov    %rdi,%r13
  mov    %rsi,%rbp
  mov    %ecx,%ebx
  test   %rdi,%rdi
  je     L39
  mov    $0x0,%eax
  test   %ecx,%ecx
  jne    L38
L40:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
L38:
  call   <SDL_imageFilterMMXdetect@plt>
  cmp    $0x7,%ebx
  jbe    L51
  test   %rax,%rax
  jne    L16
L51:
  mov    $0x0,%esi
L77:
  mov    $0x0,%edx
L94:
  movzbl 0x0(%r13,%rdx,1),%eax
  shr    %al
  movzbl %al,%eax
  movzbl 0x0(%rbp,%rdx,1),%ecx
  imul   %ecx,%eax
  mov    $0xff,%ecx
  cmp    %ecx,%eax
  cmovg  %ecx,%eax
  mov    %al,(%r12,%rdx,1)
  add    $0x1,%rdx
  lea    (%rsi,%rdx,1),%eax
  cmp    %eax,%ebx
  ja     L94
  mov    $0x0,%eax
  jmp    L40
L16:
  mov    %ebx,%ecx
  mov    %r12,%rdx
  mov    %rbp,%rsi
  mov    %r13,%rdi
  call   <SDL_imageFilterMultDivby2MMX@plt>
  mov    $0x0,%eax
  test   $0x7,%bl
  je     L40
  mov    %ebx,%esi
  and    $0xfffffff8,%esi
  cmp    %esi,%ebx
  jbe    L40
  mov    %esi,%eax
  add    %rax,%r13
  add    %rax,%rbp
  add    %rax,%r12
  jmp    L77
L39:
  mov    $0xffffffff,%eax
  jmp    L40
```

assistant: ```c
int SDL_imageFilterMultDivby2(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((Src1 == NULL) || (Src2 == NULL) || (Dest == NULL))
    return (-1);
  if (length == 0)
    return (0);
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterMultDivby2MMX(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 = ((int)*cursrc1 / 2) * (int)*cursrc2;
    if (result > 255)
      result = 255;
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  return (0);
}
```
user: 请从给定的汇编指令推导出C源代码：

```asm
<SDL_imageFilterMultDivby2>:
  endbr64
  push   %r13
  push   %r12
  mov    %rdx,%r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  test   %rsi,%rsi
  sete   %al
  test   %rdx,%rdx
  sete   %dl
  or     %dl,%al
  jne    L22
  mov    %rdi,%r13
  test   %rdi,%rdi
  je     L22
  mov    %ecx,%ebx
  test   %ecx,%ecx
  jne    L15
L72:
  xor    %eax,%eax
L94:
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  ret
  nopl   0x0(%rax)
L15:
  xor    %eax,%eax
  mov    %rsi,%rbp
  call   <SDL_imageFilterMMXdetect@plt>
  test   %rax,%rax
  je     L57
  cmp    $0x7,%ebx
  ja     L7
L57:
  xor    %esi,%esi
L1:
  xor    %edx,%edx
L104:
  movzbl 0x0(%r13,%rdx,1),%eax
  movzbl 0x0(%rbp,%rdx,1),%ecx
  shr    %al
  movzbl %al,%eax
  imul   %ecx,%eax
  mov    $0xff,%ecx
  cmp    %ecx,%eax
  cmovg  %ecx,%eax
  mov    %al,(%r12,%rdx,1)
  add    $0x1,%rdx
  lea    (%rsi,%rdx,1),%eax
  cmp    %eax,%ebx
  ja     L104
  jmp    L72
  xchg   %ax,%ax
L7:
  mov    %ebx,%ecx
  mov    %r12,%rdx
  mov    %rbp,%rsi
  mov    %r13,%rdi
  call   <SDL_imageFilterMultDivby2MMX@plt>
  test   $0x7,%bl
  je     L72
  mov    %ebx,%esi
  and    $0xfffffff8,%esi
  cmp    %esi,%ebx
  jbe    L72
  mov    %esi,%eax
  add    %rax,%r13
  add    %rax,%rbp
  add    %rax,%r12
  jmp    L1
L22:
  mov    $0xffffffff,%eax
  jmp    L94
```

assistant: ```c
int SDL_imageFilterMultDivby2(unsigned char *Src1, unsigned char *Src2, unsigned char *Dest, unsigned int length) {
  unsigned int i, istart;
  unsigned char *cursrc1, *cursrc2, *curdst;
  int result;
  if ((Src1 == NULL) || (Src2 == NULL) || (Dest == NULL))
    return (-1);
  if (length == 0)
    return (0);
  if ((SDL_imageFilterMMXdetect()) && (length > 7)) {
    SDL_imageFilterMultDivby2MMX(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 = ((int)*cursrc1 / 2) * (int)*cursrc2;
    if (result > 255)
      result = 255;
    *curdst = (unsigned char)result;
    cursrc1++;
    cursrc2++;
    curdst++;
  }
  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   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x18,%rsp
  movq   $0x1,-0x18(%rbp)
  jmp    L16
L12:
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,-0x1c(%rbp)
  mov    $0x0,%edi
  call   <time@plt>
  sub    -0x1c(%rbp),%eax
  mov    %eax,%ebx
  mov    -0x18(%rbp),%rax
  mov    %rax,%rdi
  call   <seq@plt>
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %ebx,%ecx
  mov    %rax,%rsi
  lea    D5(%rip),%rax
  mov    %rax,%rdi
  call   <printf@plt>
  mov    -0x18(%rbp),%rdx
  mov    %rdx,%rax
  shl    $0x2,%rax
  add    %rdx,%rax
  add    %rax,%rax
  mov    %rax,-0x18(%rbp)
L16:
  pxor   %xmm1,%xmm1
  cvtsi2sdq -0x18(%rbp),%xmm1
  movsd  D2(%rip),%xmm0
  comisd %xmm1,%xmm0
  ja     L12
  mov    $0x0,%eax
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

tool_calls: name: disassemble_data
arguments: data_tag: D5
type_infered: string
name: disassemble_data
arguments: data_tag: D2
type_infered: f64

tool: D5: seq(%ld) = %ld (%ld s)


tool: D2: 10000000000

assistant: ```c
int main() {
  int start;
  for (long i = 1; i < 1e10; i *= 10) {
    start = time(NULL);
    printf("seq(%ld) = %ld (%ld s)\n", i, seq(i), time(NULL) - start);
  }
}
```