void lines_scale2(const unsigned char *src, unsigned y, unsigned char *dst1, unsigned char *dst2, unsigned nPix)
{
const unsigned char
*u = src + ((y-1) & 7)*sc2lines_width,
*m = src + ((y+0) & 7)*sc2lines_width,
*l = src + ((y+1) & 7)*sc2lines_width;
for (unsigned i = 0; i < nPix; i += 4) {
if (*(unsigned*)(u+i) ^ *(unsigned*)(l+i)) {
__m64 mm = *(__m64*)(m+i-2);
__m64 uu = *(__m64*)(u+i-2);
__m64 ll = *(__m64*)(l+i-2);
__m64 md = _mm_slli_si64(mm,8);
__m64 mf = _mm_srli_si64(mm,8);
__m64 maskall = _mm_or_si64(_mm_cmpeq_pi8(md,mf), _mm_cmpeq_pi8(uu,ll));
__m64 e0, e1, v1, v2;
e0 = _mm_cmpeq_pi8(md,uu);
e0 = _mm_andnot_si64(maskall, e0);
e0 = _mm_srli_si64(e0,16);
e0 = _mm_unpacklo_pi8(e0, _mm_setzero_si64());
e1 = _mm_cmpeq_pi8(mf,uu);
e1 = _mm_andnot_si64(maskall, e1);
e1 = _mm_srli_si64(e1,16);
e1 = _mm_unpacklo_pi8(_mm_setzero_si64(), e1);
e0 = _mm_or_si64(e0, e1);
v1 = _m_from_int(*(unsigned*)(m+i));
v2 = _m_from_int(*(unsigned*)(u+i));
v1 = _mm_unpacklo_pi8(v1,v1);
v2 = _mm_unpacklo_pi8(v2,v2);
*(__m64*)(dst1 + 2*i) = _mm_or_si64( _mm_and_si64(e0,v2), _mm_andnot_si64(e0,v1) );
e0 = _mm_cmpeq_pi8(md,ll);
e0 = _mm_andnot_si64(maskall, e0);
e0 = _mm_srli_si64(e0,16);
e0 = _mm_unpacklo_pi8(e0, _mm_setzero_si64());
e1 = _mm_cmpeq_pi8(mf,ll);
e1 = _mm_andnot_si64(maskall, e1);
e1 = _mm_srli_si64(e1,16);
e1 = _mm_unpacklo_pi8(_mm_setzero_si64(), e1);
e0 = _mm_or_si64(e0, e1);
v1 = _m_from_int(*(unsigned*)(m+i));
v2 = _m_from_int(*(unsigned*)(l+i));
v1 = _mm_unpacklo_pi8(v1,v1);
v2 = _mm_unpacklo_pi8(v2,v2);
*(__m64*)(dst2 + 2*i) = _mm_or_si64( _mm_and_si64(e0,v2), _mm_andnot_si64(e0,v1) );
} else {
__m64 v1 = _m_from_int(*(unsigned*)(m+i));
v1 = _mm_unpacklo_pi8(v1,v1);
*(__m64*)(dst1 + 2*i) = v1;
*(__m64*)(dst2 + 2*i) = v1;
}
}
}
__m64 test84(__m64 a, __m64 b) {
// CHECK: pcmpeqb
return _mm_cmpeq_pi8(a, b);
}
