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Reworked v_popcount implementation to provide number of bits in a single lane

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This commit is contained in:
Vitaly Tuzov
2019-04-01 19:27:50 +03:00
parent b998c06d08
commit 96ab78dc4f
5 changed files with 296 additions and 127 deletions
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modules/core/src/stat.simd.hpp
+10 -14
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@@ -70,16 +70,14 @@ int normHamming(const uchar* a, int n)
}
#endif // CV_POPCNT
#if CV_SIMD128
#if CV_SIMD
{
v_uint32x4 t = v_setzero_u32();
for(; i <= n - v_uint8x16::nlanes; i += v_uint8x16::nlanes)
{
t += v_popcount(v_load(a + i));
}
v_uint64 t = vx_setzero_u64();
for(; i <= n - v_uint8::nlanes; i += v_uint8::nlanes)
t += v_popcount(v_reinterpret_as_u64(vx_load(a + i)));
result += v_reduce_sum(t);
}
#endif // CV_SIMD128
#endif // CV_SIMD
#if CV_ENABLE_UNROLLED
for(; i <= n - 4; i += 4)
{
@@ -141,16 +139,14 @@ int normHamming(const uchar* a, const uchar* b, int n)
}
#endif // CV_POPCNT
#if CV_SIMD128
#if CV_SIMD
{
v_uint32x4 t = v_setzero_u32();
for(; i <= n - v_uint8x16::nlanes; i += v_uint8x16::nlanes)
{
t += v_popcount(v_load(a + i) ^ v_load(b + i));
}
v_uint64 t = vx_setzero_u64();
for(; i <= n - v_uint8::nlanes; i += v_uint8::nlanes)
t += v_popcount(v_reinterpret_as_u64(vx_load(a + i) ^ vx_load(b + i)));
result += v_reduce_sum(t);
}
#endif // CV_SIMD128
#endif // CV_SIMD
#if CV_ENABLE_UNROLLED
for(; i <= n - 4; i += 4)
{