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Merge pull request #29274 from vrabaud:ub_lut

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Fix undefined behavior with pointer alignment
This commit is contained in:
Alexander Smorkalov
2026-06-10 11:27:54 +03:00
committed by GitHub
parent b9a38df0e6 63b59865d3
commit 9780b3b329
1 changed files with 21 additions and 55 deletions
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modules/core/include/opencv2/core/hal/intrin_sse.hpp
+21 -55
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@@ -3060,39 +3060,25 @@ inline v_float64x2 v_cvt_f64(const v_int64x2& v)
inline v_int8x16 v_lut(const schar* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int8x16(_mm_setr_epi8(tab[idx[0]], tab[idx[1]], tab[idx[ 2]], tab[idx[ 3]], tab[idx[ 4]], tab[idx[ 5]], tab[idx[ 6]], tab[idx[ 7]],
tab[idx[8]], tab[idx[9]], tab[idx[10]], tab[idx[11]], tab[idx[12]], tab[idx[13]], tab[idx[14]], tab[idx[15]]));
#else
return v_int8x16(_mm_setr_epi64(
_mm_setr_pi8(tab[idx[0]], tab[idx[1]], tab[idx[ 2]], tab[idx[ 3]], tab[idx[ 4]], tab[idx[ 5]], tab[idx[ 6]], tab[idx[ 7]]),
_mm_setr_pi8(tab[idx[8]], tab[idx[9]], tab[idx[10]], tab[idx[11]], tab[idx[12]], tab[idx[13]], tab[idx[14]], tab[idx[15]])
));
#endif
return v_int8x16(tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]],
tab[idx[4]], tab[idx[5]], tab[idx[6]], tab[idx[7]],
tab[idx[8]], tab[idx[9]], tab[idx[10]], tab[idx[11]],
tab[idx[12]], tab[idx[13]], tab[idx[14]], tab[idx[15]]);
}
inline v_int8x16 v_lut_pairs(const schar* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int8x16(_mm_setr_epi16(*(const short*)(tab + idx[0]), *(const short*)(tab + idx[1]), *(const short*)(tab + idx[2]), *(const short*)(tab + idx[3]),
*(const short*)(tab + idx[4]), *(const short*)(tab + idx[5]), *(const short*)(tab + idx[6]), *(const short*)(tab + idx[7])));
#else
return v_int8x16(_mm_setr_epi64(
_mm_setr_pi16(*(const short*)(tab + idx[0]), *(const short*)(tab + idx[1]), *(const short*)(tab + idx[2]), *(const short*)(tab + idx[3])),
_mm_setr_pi16(*(const short*)(tab + idx[4]), *(const short*)(tab + idx[5]), *(const short*)(tab + idx[6]), *(const short*)(tab + idx[7]))
));
#endif
return v_int8x16(tab[idx[0]], tab[idx[0] + 1], tab[idx[1]], tab[idx[1] + 1],
tab[idx[2]], tab[idx[2] + 1], tab[idx[3]], tab[idx[3] + 1],
tab[idx[4]], tab[idx[4] + 1], tab[idx[5]], tab[idx[5] + 1],
tab[idx[6]], tab[idx[6] + 1], tab[idx[7]], tab[idx[7] + 1]);
}
inline v_int8x16 v_lut_quads(const schar* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int8x16(_mm_setr_epi32(*(const int*)(tab + idx[0]), *(const int*)(tab + idx[1]),
*(const int*)(tab + idx[2]), *(const int*)(tab + idx[3])));
#else
return v_int8x16(_mm_setr_epi64(
_mm_setr_pi32(*(const int*)(tab + idx[0]), *(const int*)(tab + idx[1])),
_mm_setr_pi32(*(const int*)(tab + idx[2]), *(const int*)(tab + idx[3]))
));
#endif
return v_int8x16(
tab[idx[0]], tab[idx[0] + 1], tab[idx[0] + 2], tab[idx[0] + 3],
tab[idx[1]], tab[idx[1] + 1], tab[idx[1] + 2], tab[idx[1] + 3],
tab[idx[2]], tab[idx[2] + 1], tab[idx[2] + 2], tab[idx[2] + 3],
tab[idx[3]], tab[idx[3] + 1], tab[idx[3] + 2], tab[idx[3] + 3]);
}
inline v_uint8x16 v_lut(const uchar* tab, const int* idx) { return v_reinterpret_as_u8(v_lut((const schar *)tab, idx)); }
inline v_uint8x16 v_lut_pairs(const uchar* tab, const int* idx) { return v_reinterpret_as_u8(v_lut_pairs((const schar *)tab, idx)); }
@@ -3100,31 +3086,19 @@ inline v_uint8x16 v_lut_quads(const uchar* tab, const int* idx) { return v_reint
inline v_int16x8 v_lut(const short* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int16x8(_mm_setr_epi16(tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]],
tab[idx[4]], tab[idx[5]], tab[idx[6]], tab[idx[7]]));
#else
return v_int16x8(_mm_setr_epi64(
_mm_setr_pi16(tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]]),
_mm_setr_pi16(tab[idx[4]], tab[idx[5]], tab[idx[6]], tab[idx[7]])
));
#endif
return v_int16x8(tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]],
tab[idx[4]], tab[idx[5]], tab[idx[6]], tab[idx[7]]);
}
inline v_int16x8 v_lut_pairs(const short* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int16x8(_mm_setr_epi32(*(const int*)(tab + idx[0]), *(const int*)(tab + idx[1]),
*(const int*)(tab + idx[2]), *(const int*)(tab + idx[3])));
#else
return v_int16x8(_mm_setr_epi64(
_mm_setr_pi32(*(const int*)(tab + idx[0]), *(const int*)(tab + idx[1])),
_mm_setr_pi32(*(const int*)(tab + idx[2]), *(const int*)(tab + idx[3]))
));
#endif
return v_int16x8(tab[idx[0]], tab[idx[0] + 1], tab[idx[1]], tab[idx[1] + 1],
tab[idx[2]], tab[idx[2] + 1], tab[idx[3]], tab[idx[3] + 1]);
}
inline v_int16x8 v_lut_quads(const short* tab, const int* idx)
{
return v_int16x8(_mm_set_epi64x(*(const int64_t*)(tab + idx[1]), *(const int64_t*)(tab + idx[0])));
return v_int16x8(tab[idx[0]], tab[idx[0] + 1], tab[idx[0] + 2],
tab[idx[0] + 3], tab[idx[1]], tab[idx[1] + 1],
tab[idx[1] + 2], tab[idx[1] + 3]);
}
inline v_uint16x8 v_lut(const ushort* tab, const int* idx) { return v_reinterpret_as_u16(v_lut((const short *)tab, idx)); }
inline v_uint16x8 v_lut_pairs(const ushort* tab, const int* idx) { return v_reinterpret_as_u16(v_lut_pairs((const short *)tab, idx)); }
@@ -3132,15 +3106,7 @@ inline v_uint16x8 v_lut_quads(const ushort* tab, const int* idx) { return v_rein
inline v_int32x4 v_lut(const int* tab, const int* idx)
{
#if defined(_MSC_VER)
return v_int32x4(_mm_setr_epi32(tab[idx[0]], tab[idx[1]],
tab[idx[2]], tab[idx[3]]));
#else
return v_int32x4(_mm_setr_epi64(
_mm_setr_pi32(tab[idx[0]], tab[idx[1]]),
_mm_setr_pi32(tab[idx[2]], tab[idx[3]])
));
#endif
return v_int32x4(tab[idx[0]], tab[idx[1]], tab[idx[2]], tab[idx[3]]);
}
inline v_int32x4 v_lut_pairs(const int* tab, const int* idx)
{