user: What would the C source look like for the assembly code provided here:

```asm
<highbd_transpose6x6_sse2>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %rcx,-0x40(%rbp)
  mov    %r8,-0x48(%rbp)
  mov    %r9,-0x50(%rbp)
  mov    -0x30(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x28(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi16@plt>
  mov    %eax,-0x1c(%rbp)
  mov    -0x40(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi16@plt>
  mov    %eax,-0x18(%rbp)
  mov    -0x50(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x48(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi16@plt>
  mov    %eax,-0x14(%rbp)
  mov    -0x18(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi32@plt>
  mov    %eax,-0x10(%rbp)
  mov    -0x14(%rbp),%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi64@plt>
  mov    0x10(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x14(%rbp),%eax
  mov    $0x4,%esi
  mov    %eax,%edi
  call   <_mm_srli_si128@plt>
  mov    %eax,%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi64@plt>
  mov    0x18(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x18(%rbp),%edx
  mov    -0x1c(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi32@plt>
  mov    %eax,-0x10(%rbp)
  mov    -0x14(%rbp),%eax
  mov    $0x8,%esi
  mov    %eax,%edi
  call   <_mm_srli_si128@plt>
  mov    %eax,%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi64@plt>
  mov    0x20(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x30(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x28(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi16@plt>
  mov    %eax,-0xc(%rbp)
  mov    -0x40(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi16@plt>
  mov    %eax,-0x8(%rbp)
  mov    -0x50(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x48(%rbp),%rax
  mov    (%rax),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi16@plt>
  mov    %eax,-0x4(%rbp)
  mov    -0x14(%rbp),%eax
  mov    $0x4,%esi
  mov    %eax,%edi
  call   <_mm_srli_si128@plt>
  mov    %eax,%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi64@plt>
  mov    0x28(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x8(%rbp),%edx
  mov    -0xc(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi32@plt>
  mov    %eax,-0x10(%rbp)
  mov    -0x4(%rbp),%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpacklo_epi64@plt>
  mov    0x30(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x4(%rbp),%eax
  mov    $0x4,%esi
  mov    %eax,%edi
  call   <_mm_slli_si128@plt>
  mov    %eax,%edx
  mov    -0x10(%rbp),%eax
  mov    %edx,%esi
  mov    %eax,%edi
  call   <_mm_unpackhi_epi64@plt>
  mov    0x38(%rbp),%rdx
  mov    %eax,(%rdx)
  nop
  leave
  ret
```

assistant: ```c
void highbd_transpose6x6_sse2(__m128i *x0, __m128i *x1, __m128i *x2, __m128i *x3, __m128i *x4, __m128i *x5, __m128i *d0, __m128i *d1, __m128i *d2, __m128i *d3, __m128i *d4, __m128i *d5) {
  __m128i w0, w1, w2, w3, w4, w5, ww0;
  w0 = _mm_unpacklo_epi16(*x0, *x1);
  w1 = _mm_unpacklo_epi16(*x2, *x3);
  w2 = _mm_unpacklo_epi16(*x4, *x5);
  ww0 = _mm_unpacklo_epi32(w0, w1);
  *d0 = _mm_unpacklo_epi64(ww0, w2);
  *d1 = _mm_unpackhi_epi64(ww0, _mm_srli_si128(w2, 4));
  ww0 = _mm_unpackhi_epi32(w0, w1);
  *d2 = _mm_unpacklo_epi64(ww0, _mm_srli_si128(w2, 8));
  w3 = _mm_unpackhi_epi16(*x0, *x1);
  w4 = _mm_unpackhi_epi16(*x2, *x3);
  w5 = _mm_unpackhi_epi16(*x4, *x5);
  *d3 = _mm_unpackhi_epi64(ww0, _mm_srli_si128(w2, 4));
  ww0 = _mm_unpacklo_epi32(w3, w4);
  *d4 = _mm_unpacklo_epi64(ww0, w5);
  *d5 = _mm_unpackhi_epi64(ww0, _mm_slli_si128(w5, 4));
}
```