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

```asm
<neoscrypt_chacha>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x58(%rbp)
  mov    %esi,-0x5c(%rbp)
  mov    -0x58(%rbp),%rax
  mov    (%rax),%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x4(%rax),%eax
  mov    %eax,-0x40(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x8(%rax),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0xc(%rax),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x10(%rax),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x14(%rax),%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x18(%rax),%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x1c(%rax),%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x20(%rax),%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x24(%rax),%eax
  mov    %eax,-0x20(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x28(%rax),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x2c(%rax),%eax
  mov    %eax,-0x18(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x30(%rax),%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x34(%rax),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x38(%rax),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x58(%rbp),%rax
  mov    0x3c(%rax),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L11
L3:
  mov    -0x34(%rbp),%eax
  add    %eax,-0x44(%rbp)
  mov    -0x14(%rbp),%eax
  xor    -0x44(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  add    %eax,-0x24(%rbp)
  mov    -0x34(%rbp),%eax
  xor    -0x24(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  add    %eax,-0x44(%rbp)
  mov    -0x14(%rbp),%eax
  xor    -0x44(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  add    %eax,-0x24(%rbp)
  mov    -0x34(%rbp),%eax
  xor    -0x24(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x30(%rbp),%eax
  add    %eax,-0x40(%rbp)
  mov    -0x10(%rbp),%eax
  xor    -0x40(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  add    %eax,-0x20(%rbp)
  mov    -0x30(%rbp),%eax
  xor    -0x20(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x30(%rbp),%eax
  add    %eax,-0x40(%rbp)
  mov    -0x10(%rbp),%eax
  xor    -0x40(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  add    %eax,-0x20(%rbp)
  mov    -0x30(%rbp),%eax
  xor    -0x20(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x2c(%rbp),%eax
  add    %eax,-0x3c(%rbp)
  mov    -0xc(%rbp),%eax
  xor    -0x3c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x2c(%rbp),%eax
  xor    -0x1c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x2c(%rbp),%eax
  add    %eax,-0x3c(%rbp)
  mov    -0xc(%rbp),%eax
  xor    -0x3c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x2c(%rbp),%eax
  xor    -0x1c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x28(%rbp),%eax
  add    %eax,-0x38(%rbp)
  mov    -0x8(%rbp),%eax
  xor    -0x38(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x18(%rbp)
  mov    -0x28(%rbp),%eax
  xor    -0x18(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  add    %eax,-0x38(%rbp)
  mov    -0x8(%rbp),%eax
  xor    -0x38(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x18(%rbp)
  mov    -0x28(%rbp),%eax
  xor    -0x18(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x30(%rbp),%eax
  add    %eax,-0x44(%rbp)
  mov    -0x8(%rbp),%eax
  xor    -0x44(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x30(%rbp),%eax
  xor    -0x1c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x30(%rbp),%eax
  add    %eax,-0x44(%rbp)
  mov    -0x8(%rbp),%eax
  xor    -0x44(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x30(%rbp),%eax
  xor    -0x1c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x2c(%rbp),%eax
  add    %eax,-0x40(%rbp)
  mov    -0x14(%rbp),%eax
  xor    -0x40(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  add    %eax,-0x18(%rbp)
  mov    -0x2c(%rbp),%eax
  xor    -0x18(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x2c(%rbp),%eax
  add    %eax,-0x40(%rbp)
  mov    -0x14(%rbp),%eax
  xor    -0x40(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x14(%rbp)
  mov    -0x14(%rbp),%eax
  add    %eax,-0x18(%rbp)
  mov    -0x2c(%rbp),%eax
  xor    -0x18(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x28(%rbp),%eax
  add    %eax,-0x3c(%rbp)
  mov    -0x10(%rbp),%eax
  xor    -0x3c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  add    %eax,-0x24(%rbp)
  mov    -0x28(%rbp),%eax
  xor    -0x24(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x28(%rbp),%eax
  add    %eax,-0x3c(%rbp)
  mov    -0x10(%rbp),%eax
  xor    -0x3c(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x10(%rbp),%eax
  add    %eax,-0x24(%rbp)
  mov    -0x28(%rbp),%eax
  xor    -0x24(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x28(%rbp)
  mov    -0x34(%rbp),%eax
  add    %eax,-0x38(%rbp)
  mov    -0xc(%rbp),%eax
  xor    -0x38(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x10,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  add    %eax,-0x20(%rbp)
  mov    -0x34(%rbp),%eax
  xor    -0x20(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0xc,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x34(%rbp),%eax
  add    %eax,-0x38(%rbp)
  mov    -0xc(%rbp),%eax
  xor    -0x38(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x8,%eax
  mov    %eax,-0xc(%rbp)
  mov    -0xc(%rbp),%eax
  add    %eax,-0x20(%rbp)
  mov    -0x34(%rbp),%eax
  xor    -0x20(%rbp),%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  rol    $0x7,%eax
  mov    %eax,-0x34(%rbp)
  subl   $0x2,-0x5c(%rbp)
L11:
  cmpl   $0x0,-0x5c(%rbp)
  jne    L3
  mov    -0x58(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x44(%rbp),%eax
  add    %eax,%edx
  mov    -0x58(%rbp),%rax
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x4,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x4,%rax
  mov    -0x40(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x8,%rax
  mov    -0x3c(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0xc,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0xc,%rax
  mov    -0x38(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x10,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x10,%rax
  mov    -0x34(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x14,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x14,%rax
  mov    -0x30(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x18,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x18,%rax
  mov    -0x2c(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x1c,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x1c,%rax
  mov    -0x28(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x20,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x20,%rax
  mov    -0x24(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x24,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x24,%rax
  mov    -0x20(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x28,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x28,%rax
  mov    -0x1c(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x2c,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x2c,%rax
  mov    -0x18(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x30,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x30,%rax
  mov    -0x14(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x34,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x34,%rax
  mov    -0x10(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x38,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x38,%rax
  mov    -0xc(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  mov    -0x58(%rbp),%rax
  add    $0x3c,%rax
  mov    (%rax),%ecx
  mov    -0x58(%rbp),%rax
  add    $0x3c,%rax
  mov    -0x8(%rbp),%edx
  add    %ecx,%edx
  mov    %edx,(%rax)
  nop
  pop    %rbp
  ret
```

assistant: ```c
void neoscrypt_chacha(unsigned int *X, unsigned int rounds) {
  unsigned int x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, t;
  x0 = X[0];
  x1 = X[1];
  x2 = X[2];
  x3 = X[3];
  x4 = X[4];
  x5 = X[5];
  x6 = X[6];
  x7 = X[7];
  x8 = X[8];
  x9 = X[9];
  x10 = X[10];
  x11 = X[11];
  x12 = X[12];
  x13 = X[13];
  x14 = X[14];
  x15 = X[15];
  for (; rounds; rounds -= 2) {
    x0 += x4;
    t = x12 ^ x0;
    x12 = (((t) << (16)) | ((t) >> (32 - 16)));
    x8 += x12;
    t = x4 ^ x8;
    x4 = (((t) << (12)) | ((t) >> (32 - 12)));
    x0 += x4;
    t = x12 ^ x0;
    x12 = (((t) << (8)) | ((t) >> (32 - 8)));
    x8 += x12;
    t = x4 ^ x8;
    x4 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x1 += x5;
    t = x13 ^ x1;
    x13 = (((t) << (16)) | ((t) >> (32 - 16)));
    x9 += x13;
    t = x5 ^ x9;
    x5 = (((t) << (12)) | ((t) >> (32 - 12)));
    x1 += x5;
    t = x13 ^ x1;
    x13 = (((t) << (8)) | ((t) >> (32 - 8)));
    x9 += x13;
    t = x5 ^ x9;
    x5 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x2 += x6;
    t = x14 ^ x2;
    x14 = (((t) << (16)) | ((t) >> (32 - 16)));
    x10 += x14;
    t = x6 ^ x10;
    x6 = (((t) << (12)) | ((t) >> (32 - 12)));
    x2 += x6;
    t = x14 ^ x2;
    x14 = (((t) << (8)) | ((t) >> (32 - 8)));
    x10 += x14;
    t = x6 ^ x10;
    x6 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x3 += x7;
    t = x15 ^ x3;
    x15 = (((t) << (16)) | ((t) >> (32 - 16)));
    x11 += x15;
    t = x7 ^ x11;
    x7 = (((t) << (12)) | ((t) >> (32 - 12)));
    x3 += x7;
    t = x15 ^ x3;
    x15 = (((t) << (8)) | ((t) >> (32 - 8)));
    x11 += x15;
    t = x7 ^ x11;
    x7 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x0 += x5;
    t = x15 ^ x0;
    x15 = (((t) << (16)) | ((t) >> (32 - 16)));
    x10 += x15;
    t = x5 ^ x10;
    x5 = (((t) << (12)) | ((t) >> (32 - 12)));
    x0 += x5;
    t = x15 ^ x0;
    x15 = (((t) << (8)) | ((t) >> (32 - 8)));
    x10 += x15;
    t = x5 ^ x10;
    x5 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x1 += x6;
    t = x12 ^ x1;
    x12 = (((t) << (16)) | ((t) >> (32 - 16)));
    x11 += x12;
    t = x6 ^ x11;
    x6 = (((t) << (12)) | ((t) >> (32 - 12)));
    x1 += x6;
    t = x12 ^ x1;
    x12 = (((t) << (8)) | ((t) >> (32 - 8)));
    x11 += x12;
    t = x6 ^ x11;
    x6 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x2 += x7;
    t = x13 ^ x2;
    x13 = (((t) << (16)) | ((t) >> (32 - 16)));
    x8 += x13;
    t = x7 ^ x8;
    x7 = (((t) << (12)) | ((t) >> (32 - 12)));
    x2 += x7;
    t = x13 ^ x2;
    x13 = (((t) << (8)) | ((t) >> (32 - 8)));
    x8 += x13;
    t = x7 ^ x8;
    x7 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
    x3 += x4;
    t = x14 ^ x3;
    x14 = (((t) << (16)) | ((t) >> (32 - 16)));
    x9 += x14;
    t = x4 ^ x9;
    x4 = (((t) << (12)) | ((t) >> (32 - 12)));
    x3 += x4;
    t = x14 ^ x3;
    x14 = (((t) << (8)) | ((t) >> (32 - 8)));
    x9 += x14;
    t = x4 ^ x9;
    x4 = (((t) << (7)) | ((t) >> (32 - 7)));
    ;
  }
  X[0] += x0;
  X[1] += x1;
  X[2] += x2;
  X[3] += x3;
  X[4] += x4;
  X[5] += x5;
  X[6] += x6;
  X[7] += x7;
  X[8] += x8;
  X[9] += x9;
  X[10] += x10;
  X[11] += x11;
  X[12] += x12;
  X[13] += x13;
  X[14] += x14;
  X[15] += x15;
}
```