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Merge pull request #13672 from arnaudbrejeon:bug_fix_12961

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PyrDown: Fix bug #12961 (#13672)

* Force unaligned pointer and create test

* More cross-platform solution

* MSVC expects a proper order

* Remove useless clang macro
This commit is contained in:
Arnaud Brejeon
2019-01-28 10:36:00 -08:00
committed by Alexander Alekhin
parent 3585522b24
commit d998e70a25
2 changed files with 11 additions and 1 deletions
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modules/imgproc/src/pyramids.cpp
+2 -1
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@@ -112,6 +112,7 @@ struct PyrDownVec_32s8u
v_rshr_pack_store<8>(dst + x, t0);
x += v_uint16::nlanes;
}
typedef int CV_DECL_ALIGNED(1) unaligned_int;
for ( ; x <= width - v_int32x4::nlanes; x += v_int32x4::nlanes)
{
v_int32x4 r0, r1, r2, r3, r4, t0;
@@ -122,7 +123,7 @@ struct PyrDownVec_32s8u
r4 = v_load(row4 + x);
t0 = r0 + r4 + (r2 + r2) + ((r1 + r3 + r2) << 2);
*(int*)(dst + x) = v_reinterpret_as_s32(v_rshr_pack<8>(v_pack_u(t0, t0), v_setzero_u16())).get0();
*((unaligned_int*) (dst + x)) = v_reinterpret_as_s32(v_rshr_pack<8>(v_pack_u(t0, t0), v_setzero_u16())).get0();
}
return x;