user: Demonstrate the C code that generates the assembly output below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x1000,%rsp
  orq    $0x0,(%rsp)
  sub    $0x8c8,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x18b8(%rsp)
  xor    %eax,%eax
  lea    0xb0(%rsp),%rdx
  mov    %rdx,0x68(%rsp)
  lea    0x8b0(%rsp),%rcx
  mov    %rcx,0x78(%rsp)
  lea    0x10b0(%rsp),%rax
  mov    %rax,0x70(%rsp)
  mov    %rax,%rsi
  mov    $0x0,%r8d
  mov    $0xff,%r10d
  mov    $0x0,%r9d
L94:
  cmp    $0x1,%r8d
  mov    %r9d,%edi
  cmovle %r10d,%edi
  mov    $0x0,%eax
L140:
  mov    %edi,(%rdx,%rax,1)
  movl   $0x0,(%rcx,%rax,1)
  movl   $0x0,(%rsi,%rax,1)
  add    $0x4,%rax
  cmp    $0x200,%rax
  jne    L140
  add    $0x1,%r8d
  add    $0x200,%rdx
  add    $0x200,%rcx
  add    $0x200,%rsi
  cmp    $0x4,%r8d
  jne    L94
  mov    $0x0,%r14d
  lea    0x10b4(%rsp),%rax
  mov    %rax,0x30(%rsp)
  lea    0x10b8(%rsp),%rax
  mov    %rax,0x38(%rsp)
  lea    0xb4(%rsp),%rax
  mov    %rax,0x40(%rsp)
  lea    0xb8(%rsp),%rax
  mov    %rax,0x50(%rsp)
  jmp    L67
L47:
  movl   $0x1,0x80(%rsp)
  movl   $0x2,0x84(%rsp)
  movl   $0x1,0x88(%rsp)
  movl   $0x2,0x8c(%rsp)
  movl   $0x4,0x90(%rsp)
  movl   $0x2,0x94(%rsp)
  movl   $0x1,0x98(%rsp)
  movl   $0x2,0x9c(%rsp)
  movl   $0x1,0xa0(%rsp)
L226:
  lea    0x80(%rsp),%rax
  lea    0xa4(%rsp),%rsi
  mov    $0x0,%edx
L45:
  mov    (%rax),%edi
  mov    %edi,%ecx
  neg    %ecx
  cmovs  %edi,%ecx
  add    %ecx,%edx
  mov    0x4(%rax),%edi
  mov    %edi,%ecx
  neg    %ecx
  cmovs  %edi,%ecx
  add    %edx,%ecx
  mov    0x8(%rax),%edi
  mov    %edi,%edx
  neg    %edx
  cmovs  %edi,%edx
  add    %ecx,%edx
  add    $0xc,%rax
  cmp    %rsi,%rax
  jne    L45
  test   %edx,%edx
  mov    $0x1,%eax
  cmovne %edx,%eax
  mov    %eax,0x2c(%rsp)
  mov    0x80(%rsp),%eax
  mov    %eax,0x8(%rsp)
  mov    0x84(%rsp),%eax
  mov    %eax,0xc(%rsp)
  mov    0x88(%rsp),%eax
  mov    %eax,0x10(%rsp)
  mov    0x8c(%rsp),%eax
  mov    %eax,0x14(%rsp)
  mov    0x90(%rsp),%eax
  mov    %eax,0x18(%rsp)
  mov    0x94(%rsp),%eax
  mov    %eax,0x1c(%rsp)
  mov    0x98(%rsp),%eax
  mov    %eax,0x20(%rsp)
  mov    0x9c(%rsp),%eax
  mov    %eax,0x24(%rsp)
  mov    0xa0(%rsp),%eax
  mov    %eax,0x28(%rsp)
  mov    0x70(%rsp),%rax
  mov    %rax,0x60(%rsp)
  mov    0x68(%rsp),%rax
  mov    %rax,0x58(%rsp)
  movq   $0x3f8,(%rsp)
  lea    0x8b4(%rsp),%rax
  mov    %rax,0x48(%rsp)
  jmp    L48
L68:
  movl   $0x1,0x80(%rsp)
  movl   $0x0,0x84(%rsp)
  movl   $0xffffffff,0x88(%rsp)
  movl   $0x2,0x8c(%rsp)
  movl   $0x0,0x90(%rsp)
  movl   $0xfffffffe,0x94(%rsp)
  movl   $0x1,0x98(%rsp)
  movl   $0x0,0x9c(%rsp)
  movl   $0xffffffff,0xa0(%rsp)
  jmp    L226
L65:
  mov    (%r12),%eax
  mov    0x4(%r12),%r11d
  mov    0x8(%r12),%r10d
  mov    0xb0(%rsp,%rcx,1),%r9d
  mov    0x40(%rsp),%rdx
  mov    (%rdx,%rcx,1),%r8d
  mov    0x50(%rsp),%rdi
  mov    (%rdi,%rcx,1),%edi
  mov    0x0(%r13),%esi
  mov    0x4(%r13),%edx
  mov    0x8(%r13),%r15d
  jmp    L24
L71:
  mov    0x30(%rsp),%rsi
  mov    %eax,(%rsi,%rcx,1)
L224:
  add    $0x4,%r12
  add    $0x4,%r13
  add    $0x4,%rbx
  add    $0x4,%rbp
  add    $0x4,%rcx
  cmp    (%rsp),%rcx
  je     L156
L83:
  test   %r14d,%r14d
  je     L65
  mov    (%rbx),%eax
  mov    0x4(%rbx),%r11d
  mov    0x8(%rbx),%r10d
  mov    0x10b0(%rsp,%rcx,1),%r9d
  mov    0x30(%rsp),%rsi
  mov    (%rsi,%rcx,1),%r8d
  mov    0x38(%rsp),%rdi
  mov    (%rdi,%rcx,1),%edi
  mov    0x0(%rbp),%esi
  mov    0x4(%rbp),%edx
  mov    0x8(%rbp),%r15d
L24:
  imul   0x8(%rsp),%eax
  imul   0xc(%rsp),%r11d
  add    %eax,%r11d
  imul   0x10(%rsp),%r10d
  add    %r11d,%r10d
  imul   0x14(%rsp),%r9d
  add    %r10d,%r9d
  imul   0x18(%rsp),%r8d
  add    %r9d,%r8d
  imul   0x1c(%rsp),%edi
  add    %r8d,%edi
  imul   0x20(%rsp),%esi
  add    %edi,%esi
  imul   0x24(%rsp),%edx
  add    %esi,%edx
  imul   0x28(%rsp),%r15d
  lea    (%rdx,%r15,1),%eax
  cltd
  idivl  0x2c(%rsp)
  test   %r14d,%r14d
  je     L71
  cmp    $0x1,%r14d
  je     L59
  mov    0x48(%rsp),%rsi
  mov    %eax,(%rsi,%rcx,1)
  jmp    L224
L59:
  mov    0x40(%rsp),%rdx
  mov    %eax,(%rdx,%rcx,1)
  jmp    L224
L156:
  addq   $0x200,(%rsp)
  mov    (%rsp),%rax
  addq   $0x200,0x58(%rsp)
  addq   $0x200,0x60(%rsp)
  cmp    $0x7f8,%rax
  je     L23
L48:
  mov    0x58(%rsp),%r12
  lea    0x400(%r12),%r13
  mov    0x60(%rsp),%rbx
  lea    0x400(%rbx),%rbp
  mov    (%rsp),%rax
  lea    -0x1f8(%rax),%rcx
  jmp    L83
L23:
  add    $0x1,%r14d
  cmp    $0x3,%r14d
  je     L147
L67:
  test   %r14d,%r14d
  je     L47
  cmp    $0x1,%r14d
  je     L68
  cmp    $0x2,%r14d
  jne    L226
  movl   $0x1,0x80(%rsp)
  movl   $0x2,0x84(%rsp)
  movl   $0x1,0x88(%rsp)
  movl   $0x0,0x8c(%rsp)
  movl   $0x0,0x90(%rsp)
  movl   $0x0,0x94(%rsp)
  movl   $0xffffffff,0x98(%rsp)
  movl   $0xfffffffe,0x9c(%rsp)
  movl   $0xffffffff,0xa0(%rsp)
  jmp    L226
L147:
  mov    0x68(%rsp),%r11
  lea    0x800(%r11),%r10
  mov    $0x0,%edi
  mov    $0xff,%r9d
  mov    $0x0,%r8d
  mov    0x78(%rsp),%rbx
L159:
  mov    $0x0,%edx
L120:
  mov    (%r11,%rdx,1),%ecx
  mov    %ecx,%eax
  neg    %eax
  cmovs  %ecx,%eax
  mov    (%rbx,%rdx,1),%esi
  mov    %esi,%ecx
  neg    %ecx
  cmovs  %esi,%ecx
  cmp    %ecx,%eax
  cmovl  %ecx,%eax
  cmp    $0x7f,%eax
  mov    %r8d,%eax
  cmovg  %r9d,%eax
  add    %eax,%edi
  add    $0x4,%rdx
  cmp    $0x200,%rdx
  jne    L120
  add    $0x200,%r11
  add    $0x200,%rbx
  cmp    %r11,%r10
  jne    L159
  cmp    $0x817e,%edi
  mov    $0xbadbeef,%eax
  mov    $0xbad,%edx
  cmovne %edx,%eax
  mov    0x18b8(%rsp),%rdx
  sub    %fs:0x28,%rdx
  jne    L11
  add    $0x18c8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L11:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  int temp1, temp2, temp3, temp4;
  int i;
  int j;
  int checksum, iter;
  int r;
  int c;
  int dead_rows;
  int dead_cols;
  int sum;
  int normal_factor;
  int image_buffer1[4][128];
  int image_buffer2[4][128];
  int image_buffer3[4][128];
  int filter[3][3];
  for (i = 0; i < 4; i++)
    for (j = 0; j < 128; j++) {
      image_buffer1[i][j] = (i < 4 / 2) ? 255 : 0;
      image_buffer2[i][j] = 0;
      image_buffer3[i][j] = 0;
    }
  for (iter = 0; iter < 3; iter++) {
    if (iter == 0) {
      filter[0][0] = 1;
      filter[0][1] = 2;
      filter[0][2] = 1;
      filter[1][0] = 2;
      filter[1][1] = 4;
      filter[1][2] = 2;
      filter[2][0] = 1;
      filter[2][1] = 2;
      filter[2][2] = 1;
    }
    if (iter == 1) {
      filter[0][0] = 1;
      filter[0][1] = 0;
      filter[0][2] = -1;
      filter[1][0] = 2;
      filter[1][1] = 0;
      filter[1][2] = -2;
      filter[2][0] = 1;
      filter[2][1] = 0;
      filter[2][2] = -1;
    }
    if (iter == 2) {
      filter[0][0] = 1;
      filter[0][1] = 2;
      filter[0][2] = 1;
      filter[1][0] = 0;
      filter[1][1] = 0;
      filter[1][2] = 0;
      filter[2][0] = -1;
      filter[2][1] = -2;
      filter[2][2] = -1;
    }
    dead_rows = 1;
    dead_cols = 1;
    normal_factor = 0;
    for (r = 0; r < 3; r++)
      for (c = 0; c < 3; c++) {
        int tmp = filter[r][c];
        if (tmp < 0)
          tmp = -tmp;
        normal_factor = normal_factor + tmp;
      }
    if (normal_factor == 0)
      normal_factor = 1;
    for (r = 0; r < 4 - 2; r++)
      for (c = 0; c < 128 - 2; c++) {
        int out, in0, in1, in2, in3, in4, in5, in6, in7, in8;
        in0 = (iter == 0) ? image_buffer1[r + 0][c + 0] : image_buffer3[r + 0][c + 0];
        in1 = (iter == 0) ? image_buffer1[r + 0][c + 1] : image_buffer3[r + 0][c + 1];
        in2 = (iter == 0) ? image_buffer1[r + 0][c + 2] : image_buffer3[r + 0][c + 2];
        in3 = (iter == 0) ? image_buffer1[r + 1][c + 0] : image_buffer3[r + 1][c + 0];
        in4 = (iter == 0) ? image_buffer1[r + 1][c + 1] : image_buffer3[r + 1][c + 1];
        in5 = (iter == 0) ? image_buffer1[r + 1][c + 2] : image_buffer3[r + 1][c + 2];
        in6 = (iter == 0) ? image_buffer1[r + 2][c + 0] : image_buffer3[r + 2][c + 0];
        in7 = (iter == 0) ? image_buffer1[r + 2][c + 1] : image_buffer3[r + 2][c + 1];
        in8 = (iter == 0) ? image_buffer1[r + 2][c + 2] : image_buffer3[r + 2][c + 2];
        sum = in0 * filter[0][0] + in1 * filter[0][1] + in2 * filter[0][2] + in3 * filter[1][0] + in4 * filter[1][1] + in5 * filter[1][2] + in6 * filter[2][0] + in7 * filter[2][1] + in8 * filter[2][2];
        out = sum / normal_factor;
        if (iter == 0)
          image_buffer3[r + dead_rows][c + dead_cols] = out;
        else if (iter == 1)
          image_buffer1[r + dead_rows][c + dead_cols] = out;
        else
          image_buffer2[r + dead_rows][c + dead_cols] = out;
      }
  }
  checksum = 0;
  for (i = 0; i < 4; i++)
    for (j = 0; j < 128; j++) {
      temp1 = image_buffer1[i][j];
      if (temp1 < 0)
        temp1 = -temp1;
      temp2 = image_buffer2[i][j];
      if (temp2 < 0)
        temp2 = -temp2;
      temp3 = (temp2 < temp1) ? temp1 : temp2;
      temp4 = (127 < temp3) ? 255 : 0;
      image_buffer3[i][j] = temp4;
      checksum += temp4;
    }
  if (checksum == 33150) {
    return 0xbadbeef;
  } else {
    return 0xbad;
  }
}
```