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

```asm
<p3dZeroPadding2D_16>:
  endbr64
  lea    (%r8,%r8,1),%eax
  push   %r15
  mov    %ecx,%r15d
  push   %r14
  lea    (%rax,%rdx,1),%r14d
  add    %ecx,%eax
  push   %r13
  imul   %r14d,%eax
  mov    %r8d,%r13d
  push   %r12
  mov    %rdi,%r12
  push   %rbp
  mov    %edx,%ebp
  push   %rbx
  mov    %rsi,%rbx
  lea    (%rax,%rax,1),%edx
  xor    %esi,%esi
  mov    %rbx,%rdi
  sub    $0x48,%rsp
  mov    %ecx,0x28(%rsp)
  mov    %r14d,0xc(%rsp)
  call   <memset@plt>
  test   %r15d,%r15d
  jle    L144
  test   %ebp,%ebp
  jle    L144
  mov    %r14d,%r9d
  movslq %ebp,%rax
  movslq %r13d,%rdi
  mov    %r12,%rdx
  imul   %r13d,%r9d
  mov    %rax,0x18(%rsp)
  add    %rax,%rax
  xor    %r8d,%r8d
  mov    %rax,0x20(%rsp)
  movslq %r14d,%rax
  xor    %r10d,%r10d
  xor    %r14d,%r14d
  mov    %rax,0x10(%rsp)
  movslq %r9d,%rax
  add    %rax,%rdi
  lea    -0x1(%rbp),%eax
  mov    %eax,0x8(%rsp)
  mov    %ebp,%eax
  shr    $0x3,%eax
  lea    -0x1(%rax),%esi
  mov    %ebp,%eax
  and    $0xfffffff8,%eax
  add    $0x1,%rsi
  mov    %eax,0x2c(%rsp)
  mov    %ebp,%eax
  shl    $0x4,%rsi
  and    $0x7,%eax
  mov    %eax,0x30(%rsp)
  sub    $0x1,%eax
  mov    %eax,0x34(%rsp)
  mov    %ebp,%eax
  mov    %rax,0x38(%rsp)
L42:
  lea    (%rbx,%rdi,2),%rax
  lea    0x2(%rdx),%r11
  mov    %rax,%rcx
  sub    %r11,%rcx
  cmp    $0xc,%rcx
  jbe    L67
  cmpl   $0x2,0x8(%rsp)
  jbe    L67
  cmpl   $0x6,0x8(%rsp)
  jbe    L29
  xor    %ecx,%ecx
L5:
  movdqu (%rdx,%rcx,1),%xmm0
  movups %xmm0,(%rax,%rcx,1)
  add    $0x10,%rcx
  cmp    %rsi,%rcx
  jne    L5
  mov    0x2c(%rsp),%eax
  cmp    %eax,%ebp
  je     L13
  cmpl   $0x2,0x34(%rsp)
  mov    0x30(%rsp),%r11d
  mov    %eax,%ecx
  jbe    L75
L64:
  lea    (%r8,%rcx,1),%r15
  add    %rdi,%rcx
  mov    (%r12,%r15,2),%r15
  mov    %r15,(%rbx,%rcx,2)
  mov    %r11d,%ecx
  and    $0xfffffffc,%ecx
  add    %ecx,%eax
  cmp    %ecx,%r11d
  je     L13
L75:
  lea    (%r10,%rax,1),%ecx
  movslq %ecx,%rcx
  movzwl (%r12,%rcx,2),%r11d
  lea    0x0(%r13,%rax,1),%ecx
  add    %r9d,%ecx
  movslq %ecx,%rcx
  mov    %r11w,(%rbx,%rcx,2)
  lea    0x1(%rax),%ecx
  cmp    %ecx,%ebp
  jle    L13
  lea    (%r10,%rcx,1),%r11d
  add    %r13d,%ecx
  add    $0x2,%eax
  movslq %r11d,%r11
  add    %r9d,%ecx
  movzwl (%r12,%r11,2),%r11d
  movslq %ecx,%rcx
  mov    %r11w,(%rbx,%rcx,2)
  cmp    %eax,%ebp
  jle    L13
  lea    (%r10,%rax,1),%ecx
  add    %r13d,%eax
  movslq %ecx,%rcx
  add    %r9d,%eax
  movzwl (%r12,%rcx,2),%ecx
  cltq
  mov    %cx,(%rbx,%rax,2)
L13:
  add    $0x1,%r14d
  add    0x20(%rsp),%rdx
  add    %ebp,%r10d
  add    0xc(%rsp),%r9d
  add    0x18(%rsp),%r8
  add    0x10(%rsp),%rdi
  cmp    %r14d,0x28(%rsp)
  jne    L42
L144:
  add    $0x48,%rsp
  mov    $0x2,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  xchg   %ax,%ax
L67:
  mov    0x38(%rsp),%r15
  xor    %ecx,%ecx
  nopw   0x0(%rax,%rax,1)
L140:
  movzwl (%rdx,%rcx,2),%r11d
  mov    %r11w,(%rax,%rcx,2)
  add    $0x1,%rcx
  cmp    %r15,%rcx
  jne    L140
  jmp    L13
L29:
  mov    %ebp,%r11d
  xor    %ecx,%ecx
  xor    %eax,%eax
  jmp    L64
```

assistant: ```c
int p3dZeroPadding2D_16(unsigned short *in_im, unsigned short *out_im, const int dimx, const int dimy, const int size, int (*wr_log)(const char *, ...), int (*wr_progress)(const int, ...)) {
  int a_dimx, a_dimy;
  int i, j;
  a_dimx = dimx + size * 2;
  a_dimy = dimy + size * 2;
  memset(out_im, 0, a_dimx * a_dimy * sizeof(unsigned short));
  for (j = 0; j < dimy; j++)
    for (i = 0; i < dimx; i++)
      out_im[((j + size) * (a_dimx) + (i + size))] = in_im[((j) * (dimx) + (i))];
  return 2;
}
```