Speedup filter2d by loop unrolling

diff --git a/modules/imgproc/src/filter.cpp b/modules/imgproc/src/filter.cpp
index 9107d00..85b4dd0 100644 (file)
--- a/modules/imgproc/src/filter.cpp
+++ b/modules/imgproc/src/filter.cpp
@@ -587,6 +587,7 @@ struct RowVec_8u32s
                 i += v_uint32::nlanes;
             }
         }
+        vx_cleanup();
         return i;
     }
 
@@ -1083,6 +1084,7 @@ struct SymmRowSmallVec_8u32s
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1106,6 +1108,8 @@ struct SymmColumnVec_32s8u
     int operator()(const uchar** _src, uchar* dst, int width) const
     {
         int _ksize = kernel.rows + kernel.cols - 1;
+        if( _ksize == 1 )
+            return 0;
         int ksize2 = _ksize/2;
         const float* ky = kernel.ptr<float>() + ksize2;
         int i = 0, k;
@@ -1115,9 +1119,8 @@ struct SymmColumnVec_32s8u
         v_float32 d4 = vx_setall_f32(delta);
         if( symmetrical )
         {
-            if (_ksize == 1)
-                return 0;
             v_float32 f0 = vx_setall_f32(ky[0]);
+            v_float32 f1 = vx_setall_f32(ky[1]);
             for( ; i <= width - v_uint8::nlanes; i += v_uint8::nlanes )
             {
                 const int* S = src[0] + i;
@@ -1125,11 +1128,17 @@ struct SymmColumnVec_32s8u
                 v_float32 s1 = v_muladd(v_cvt_f32(vx_load(S + v_int32::nlanes)), f0, d4);
                 v_float32 s2 = v_muladd(v_cvt_f32(vx_load(S + 2*v_int32::nlanes)), f0, d4);
                 v_float32 s3 = v_muladd(v_cvt_f32(vx_load(S + 3*v_int32::nlanes)), f0, d4);
-                for( k = 1; k <= ksize2; k++ )
+                const int* S0 = src[1] + i;
+                const int* S1 = src[-1] + i;
+                s0 = v_muladd(v_cvt_f32(vx_load(S0) + vx_load(S1)), f1, s0);
+                s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) + vx_load(S1 + v_int32::nlanes)), f1, s1);
+                s2 = v_muladd(v_cvt_f32(vx_load(S0 + 2 * v_int32::nlanes) + vx_load(S1 + 2 * v_int32::nlanes)), f1, s2);
+                s3 = v_muladd(v_cvt_f32(vx_load(S0 + 3 * v_int32::nlanes) + vx_load(S1 + 3 * v_int32::nlanes)), f1, s3);
+                for( k = 2; k <= ksize2; k++ )
                 {
                     v_float32 f = vx_setall_f32(ky[k]);
-                    const int* S0 = src[k] + i;
-                    const int* S1 = src[-k] + i;
+                    S0 = src[k] + i;
+                    S1 = src[-k] + i;
                     s0 = v_muladd(v_cvt_f32(vx_load(S0) + vx_load(S1)), f, s0);
                     s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) + vx_load(S1 + v_int32::nlanes)), f, s1);
                     s2 = v_muladd(v_cvt_f32(vx_load(S0 + 2*v_int32::nlanes) + vx_load(S1 + 2*v_int32::nlanes)), f, s2);
@@ -1142,11 +1151,15 @@ struct SymmColumnVec_32s8u
                 const int* S = src[0] + i;
                 v_float32 s0 = v_muladd(v_cvt_f32(vx_load(S)), f0, d4);
                 v_float32 s1 = v_muladd(v_cvt_f32(vx_load(S + v_int32::nlanes)), f0, d4);
-                for( k = 1; k <= ksize2; k++ )
+                const int* S0 = src[1] + i;
+                const int* S1 = src[-1] + i;
+                s0 = v_muladd(v_cvt_f32(vx_load(S0) + vx_load(S1)), f1, s0);
+                s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) + vx_load(S1 + v_int32::nlanes)), f1, s1);
+                for( k = 2; k <= ksize2; k++ )
                 {
                     v_float32 f = vx_setall_f32(ky[k]);
-                    const int* S0 = src[k] + i;
-                    const int* S1 = src[-k] + i;
+                    S0 = src[k] + i;
+                    S1 = src[-k] + i;
                     s0 = v_muladd(v_cvt_f32(vx_load(S0) + vx_load(S1)), f, s0);
                     s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) + vx_load(S1 + v_int32::nlanes)), f, s1);
                 }
@@ -1160,7 +1173,8 @@ struct SymmColumnVec_32s8u
 #endif
             {
                 v_float32x4 s0 = v_muladd(v_cvt_f32(v_load(src[0] + i)), v_setall_f32(ky[0]), v_setall_f32(delta));
-                for( k = 1; k <= ksize2; k++ )
+                s0 = v_muladd(v_cvt_f32(v_load(src[1] + i) + v_load(src[-1] + i)), v_setall_f32(ky[1]), s0);
+                for( k = 2; k <= ksize2; k++ )
                     s0 = v_muladd(v_cvt_f32(v_load(src[k] + i) + v_load(src[-k] + i)), v_setall_f32(ky[k]), s0);
                 v_int32x4 s32 = v_round(s0);
                 v_int16x8 s16 = v_pack(s32, s32);
@@ -1170,17 +1184,20 @@ struct SymmColumnVec_32s8u
         }
         else
         {
+            v_float32 f1 = vx_setall_f32(ky[1]);
             for( ; i <= width - v_uint8::nlanes; i += v_uint8::nlanes )
             {
-                v_float32 s0 = d4;
-                v_float32 s1 = d4;
-                v_float32 s2 = d4;
-                v_float32 s3 = d4;
-                for ( k = 1; k <= ksize2; k++ )
+                const int* S0 = src[1] + i;
+                const int* S1 = src[-1] + i;
+                v_float32 s0 = v_muladd(v_cvt_f32(vx_load(S0) - vx_load(S1)), f1, d4);
+                v_float32 s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) - vx_load(S1 + v_int32::nlanes)), f1, d4);
+                v_float32 s2 = v_muladd(v_cvt_f32(vx_load(S0 + 2 * v_int32::nlanes) - vx_load(S1 + 2 * v_int32::nlanes)), f1, d4);
+                v_float32 s3 = v_muladd(v_cvt_f32(vx_load(S0 + 3 * v_int32::nlanes) - vx_load(S1 + 3 * v_int32::nlanes)), f1, d4);
+                for ( k = 2; k <= ksize2; k++ )
                 {
                     v_float32 f = vx_setall_f32(ky[k]);
-                    const int* S0 = src[k] + i;
-                    const int* S1 = src[-k] + i;
+                    S0 = src[k] + i;
+                    S1 = src[-k] + i;
                     s0 = v_muladd(v_cvt_f32(vx_load(S0) - vx_load(S1)), f, s0);
                     s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) - vx_load(S1 + v_int32::nlanes)), f, s1);
                     s2 = v_muladd(v_cvt_f32(vx_load(S0 + 2*v_int32::nlanes) - vx_load(S1 + 2*v_int32::nlanes)), f, s2);
@@ -1190,13 +1207,15 @@ struct SymmColumnVec_32s8u
             }
             if( i <= width - v_uint16::nlanes )
             {
-                v_float32 s0 = d4;
-                v_float32 s1 = d4;
-                for ( k = 1; k <= ksize2; k++ )
+                const int* S0 = src[1] + i;
+                const int* S1 = src[-1] + i;
+                v_float32 s0 = v_muladd(v_cvt_f32(vx_load(S0) - vx_load(S1)), f1, d4);
+                v_float32 s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) - vx_load(S1 + v_int32::nlanes)), f1, d4);
+                for ( k = 2; k <= ksize2; k++ )
                 {
                     v_float32 f = vx_setall_f32(ky[k]);
-                    const int* S0 = src[k] + i;
-                    const int* S1 = src[-k] + i;
+                    S0 = src[k] + i;
+                    S1 = src[-k] + i;
                     s0 = v_muladd(v_cvt_f32(vx_load(S0) - vx_load(S1)), f, s0);
                     s1 = v_muladd(v_cvt_f32(vx_load(S0 + v_int32::nlanes) - vx_load(S1 + v_int32::nlanes)), f, s1);
                 }
@@ -1209,8 +1228,8 @@ struct SymmColumnVec_32s8u
             if( i <= width - v_int32x4::nlanes )
 #endif
             {
-                v_float32x4 s0 = v_setall_f32(delta);
-                for (k = 1; k <= ksize2; k++)
+                v_float32x4 s0 = v_muladd(v_cvt_f32(v_load(src[1] + i) - v_load(src[-1] + i)), v_setall_f32(ky[1]), v_setall_f32(delta));
+                for (k = 2; k <= ksize2; k++)
                     s0 = v_muladd(v_cvt_f32(v_load(src[k] + i) - v_load(src[-k] + i)), v_setall_f32(ky[k]), s0);
                 v_int32x4 s32 = v_round(s0);
                 v_int16x8 s16 = v_pack(s32, s32);
@@ -1219,6 +1238,7 @@ struct SymmColumnVec_32s8u
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1250,57 +1270,104 @@ struct SymmColumnSmallVec_32s16s
         short* dst = (short*)_dst;
 
         v_float32 df4 = vx_setall_f32(delta);
-        v_int32 d4 = v_round(df4);
+        int d = cvRound(delta);
+        v_int16 d8 = vx_setall_s16((short)d);
         if( symmetrical )
         {
             if( ky[0] == 2 && ky[1] == 1 )
             {
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
+                    v_int32 s0 = vx_load(S1 + i);
+                    v_int32 s1 = vx_load(S1 + i + v_int32::nlanes);
+                    v_int32 s2 = vx_load(S1 + i + 2*v_int32::nlanes);
+                    v_int32 s3 = vx_load(S1 + i + 3*v_int32::nlanes);
+                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) + (s0 + s0), vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) + (s1 + s1)) + d8);
+                    v_store(dst + i + v_int16::nlanes, v_pack(vx_load(S0 + i + 2*v_int32::nlanes) + vx_load(S2 + i + 2*v_int32::nlanes) + (s2 + s2),
+                                                              vx_load(S0 + i + 3*v_int32::nlanes) + vx_load(S2 + i + 3*v_int32::nlanes) + (s3 + s3)) + d8);
+                }
+                if( i <= width - v_int16::nlanes )
                 {
                     v_int32 sl = vx_load(S1 + i);
                     v_int32 sh = vx_load(S1 + i + v_int32::nlanes);
-                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) + d4 + (sl + sl), vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) + d4 + (sh + sh)));
+                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) + (sl + sl), vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) + (sh + sh)) + d8);
+                    i += v_int16::nlanes;
                 }
                 if( i <= width - v_int32::nlanes )
                 {
                     v_int32 s = vx_load(S1 + i);
-                    v_pack_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + d4 + (s + s));
+                    v_pack_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + vx_setall_s32(d) + (s + s));
                     i += v_int32::nlanes;
                 }
             }
             else if( ky[0] == -2 && ky[1] == 1 )
             {
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
+                    v_int32 s0 = vx_load(S1 + i);
+                    v_int32 s1 = vx_load(S1 + i + v_int32::nlanes);
+                    v_int32 s2 = vx_load(S1 + i + 2*v_int32::nlanes);
+                    v_int32 s3 = vx_load(S1 + i + 3*v_int32::nlanes);
+                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) - (s0 + s0),
+                                            vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) - (s1 + s1)) + d8);
+                    v_store(dst + i + v_int16::nlanes, v_pack(vx_load(S0 + i + 2*v_int32::nlanes) + vx_load(S2 + i + 2*v_int32::nlanes) - (s2 + s2),
+                                                              vx_load(S0 + i + 3*v_int32::nlanes) + vx_load(S2 + i + 3*v_int32::nlanes) - (s3 + s3)) + d8);
+                }
+                if( i <= width - v_int16::nlanes )
                 {
                     v_int32 sl = vx_load(S1 + i);
                     v_int32 sh = vx_load(S1 + i + v_int32::nlanes);
-                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) + d4 - (sl + sl), vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) + d4 - (sh + sh)));
+                    v_store(dst + i, v_pack(vx_load(S0 + i) + vx_load(S2 + i) - (sl + sl), vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes) - (sh + sh)) + d8);
+                    i += v_int16::nlanes;
                 }
                 if( i <= width - v_int32::nlanes )
                 {
                     v_int32 s = vx_load(S1 + i);
-                    v_pack_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + d4 - (s + s));
+                    v_pack_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + vx_setall_s32(d) - (s + s));
                     i += v_int32::nlanes;
                 }
             }
+#if CV_NEON
             else if( ky[0] == (float)((int)ky[0]) && ky[1] == (float)((int)ky[1]) )
             {
                 v_int32 k0 = vx_setall_s32((int)ky[0]), k1 = vx_setall_s32((int)ky[1]);
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+                v_int32 d4 = vx_setall_s32(d);
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
                     v_store(dst + i, v_pack(v_muladd(vx_load(S0 + i) + vx_load(S2 + i), k1, v_muladd(vx_load(S1 + i), k0, d4)),
                                             v_muladd(vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes), k1, v_muladd(vx_load(S1 + i + v_int32::nlanes), k0, d4))));
+                    v_store(dst + i + v_int16::nlanes, v_pack(v_muladd(vx_load(S0 + i + 2*v_int32::nlanes) + vx_load(S2 + i + 2*v_int32::nlanes), k1, v_muladd(vx_load(S1 + i + 2*v_int32::nlanes), k0, d4)),
+                                                              v_muladd(vx_load(S0 + i + 3*v_int32::nlanes) + vx_load(S2 + i + 3*v_int32::nlanes), k1, v_muladd(vx_load(S1 + i + 3*v_int32::nlanes), k0, d4))));
+                }
+                if( i <= width - v_int16::nlanes )
+                {
+                    v_store(dst + i, v_pack(v_muladd(vx_load(S0 + i) + vx_load(S2 + i), k1, v_muladd(vx_load(S1 + i), k0, d4)),
+                                            v_muladd(vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes), k1, v_muladd(vx_load(S1 + i + v_int32::nlanes), k0, d4))));
+                    i += v_int16::nlanes;
+                }
                 if( i <= width - v_int32::nlanes )
                 {
                     v_pack_store(dst + i, v_muladd(vx_load(S0 + i) + vx_load(S2 + i), k1, v_muladd(vx_load(S1 + i), k0, d4)));
                     i += v_int32::nlanes;
                 }
             }
+#endif
             else
             {
                 v_float32 k0 = vx_setall_f32(ky[0]), k1 = vx_setall_f32(ky[1]);
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
+                    v_store(dst + i, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S0 + i) + vx_load(S2 + i)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i)), k0, df4))),
+                                            v_round(v_muladd(v_cvt_f32(vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i + v_int32::nlanes)), k0, df4)))));
+                    v_store(dst + i + v_int16::nlanes, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S0 + i + 2*v_int32::nlanes) + vx_load(S2 + i + 2*v_int32::nlanes)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i + 2*v_int32::nlanes)), k0, df4))),
+                                                              v_round(v_muladd(v_cvt_f32(vx_load(S0 + i + 3*v_int32::nlanes) + vx_load(S2 + i + 3*v_int32::nlanes)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i + 3*v_int32::nlanes)), k0, df4)))));
+                }
+                if( i <= width - v_int16::nlanes )
+                {
                     v_store(dst + i, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S0 + i) + vx_load(S2 + i)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i)), k0, df4))),
                                             v_round(v_muladd(v_cvt_f32(vx_load(S0 + i + v_int32::nlanes) + vx_load(S2 + i + v_int32::nlanes)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i + v_int32::nlanes)), k0, df4)))));
+                    i += v_int16::nlanes;
+                }
                 if( i <= width - v_int32::nlanes )
                 {
                     v_pack_store(dst + i, v_round(v_muladd(v_cvt_f32(vx_load(S0 + i) + vx_load(S2 + i)), k1, v_muladd(v_cvt_f32(vx_load(S1 + i)), k0, df4))));
@@ -1314,20 +1381,38 @@ struct SymmColumnSmallVec_32s16s
             {
                 if( ky[1] < 0 )
                     std::swap(S0, S2);
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
-                    v_store(dst + i, v_pack(vx_load(S2 + i) - vx_load(S0 + i) + d4, vx_load(S2 + i + v_int32::nlanes) - vx_load(S0 + i + v_int32::nlanes) + d4));
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
+                    v_store(dst + i, v_pack(vx_load(S2 + i) - vx_load(S0 + i), vx_load(S2 + i + v_int32::nlanes) - vx_load(S0 + i + v_int32::nlanes)) + d8);
+                    v_store(dst + i + v_int16::nlanes, v_pack(vx_load(S2 + i + 2*v_int32::nlanes) - vx_load(S0 + i + 2*v_int32::nlanes), vx_load(S2 + i + 3*v_int32::nlanes) - vx_load(S0 + i + 3*v_int32::nlanes)) + d8);
+                }
+                if( i <= width - v_int16::nlanes )
+                {
+                    v_store(dst + i, v_pack(vx_load(S2 + i) - vx_load(S0 + i), vx_load(S2 + i + v_int32::nlanes) - vx_load(S0 + i + v_int32::nlanes)) + d8);
+                    i += v_int16::nlanes;
+                }
                 if( i <= width - v_int32::nlanes )
                 {
-                    v_pack_store(dst + i, vx_load(S2 + i) - vx_load(S0 + i) + d4);
+                    v_pack_store(dst + i, vx_load(S2 + i) - vx_load(S0 + i) + vx_setall_s32(d));
                     i += v_int32::nlanes;
                 }
             }
             else
             {
                 v_float32 k1 = vx_setall_f32(ky[1]);
-                for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+                for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+                {
+                    v_store(dst + i, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S2 + i) - vx_load(S0 + i)), k1, df4)),
+                                            v_round(v_muladd(v_cvt_f32(vx_load(S2 + i + v_int32::nlanes) - vx_load(S0 + i + v_int32::nlanes)), k1, df4))));
+                    v_store(dst + i + v_int16::nlanes, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S2 + i + 2*v_int32::nlanes) - vx_load(S0 + i + 2*v_int32::nlanes)), k1, df4)),
+                                                              v_round(v_muladd(v_cvt_f32(vx_load(S2 + i + 3*v_int32::nlanes) - vx_load(S0 + i + 3*v_int32::nlanes)), k1, df4))));
+                }
+                if( i <= width - v_int16::nlanes )
+                {
                     v_store(dst + i, v_pack(v_round(v_muladd(v_cvt_f32(vx_load(S2 + i) - vx_load(S0 + i)), k1, df4)),
                                             v_round(v_muladd(v_cvt_f32(vx_load(S2 + i + v_int32::nlanes) - vx_load(S0 + i + v_int32::nlanes)), k1, df4))));
+                    i += v_int16::nlanes;
+                }
                 if( i <= width - v_int32::nlanes )
                 {
                     v_pack_store(dst + i, v_round(v_muladd(v_cvt_f32(vx_load(S2 + i) - vx_load(S0 + i)), k1, df4)));
@@ -1336,6 +1421,7 @@ struct SymmColumnSmallVec_32s16s
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1362,19 +1448,43 @@ struct RowVec_16s32f
         const float* _kx = kernel.ptr<float>();
         width *= cn;
 
-        for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+        for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
+        {
+            const short* src = (const short*)_src + i;
+            v_float32 s0 = vx_setzero_f32();
+            v_float32 s1 = vx_setzero_f32();
+            v_float32 s2 = vx_setzero_f32();
+            v_float32 s3 = vx_setzero_f32();
+            for( k = 0; k < _ksize; k++, src += cn )
+            {
+                v_float32 f = vx_setall_f32(_kx[k]);
+                v_int16 xl = vx_load(src);
+                v_int16 xh = vx_load(src + v_int16::nlanes);
+                s0 = v_muladd(v_cvt_f32(v_expand_low(xl)), f, s0);
+                s1 = v_muladd(v_cvt_f32(v_expand_high(xl)), f, s1);
+                s2 = v_muladd(v_cvt_f32(v_expand_low(xh)), f, s2);
+                s3 = v_muladd(v_cvt_f32(v_expand_high(xh)), f, s3);
+            }
+            v_store(dst + i, s0);
+            v_store(dst + i + v_float32::nlanes, s1);
+            v_store(dst + i + 2*v_float32::nlanes, s2);
+            v_store(dst + i + 3*v_float32::nlanes, s3);
+        }
+        if( i <= width - v_int16::nlanes )
         {
             const short* src = (const short*)_src + i;
             v_float32 s0 = vx_setzero_f32();
             v_float32 s1 = vx_setzero_f32();
             for( k = 0; k < _ksize; k++, src += cn )
             {
+                v_float32 f = vx_setall_f32(_kx[k]);
                 v_int16 x = vx_load(src);
-                s0 = v_muladd(v_cvt_f32(v_expand_low(x)), vx_setall_f32(_kx[k]), s0);
-                s1 = v_muladd(v_cvt_f32(v_expand_high(x)), vx_setall_f32(_kx[k]), s1);
+                s0 = v_muladd(v_cvt_f32(v_expand_low(x)), f, s0);
+                s1 = v_muladd(v_cvt_f32(v_expand_high(x)), f, s1);
             }
             v_store(dst + i, s0);
             v_store(dst + i + v_float32::nlanes, s1);
+            i += v_int16::nlanes;
         }
         if( i <= width - v_float32::nlanes )
         {
@@ -1385,6 +1495,7 @@ struct RowVec_16s32f
             v_store(dst + i, s0);
             i += v_float32::nlanes;
         }
+        vx_cleanup();
         return i;
     }
 
@@ -1406,6 +1517,8 @@ struct SymmColumnVec_32f16s
     int operator()(const uchar** _src, uchar* _dst, int width) const
     {
         int _ksize = kernel.rows + kernel.cols - 1;
+        if( _ksize == 1 )
+            return 0;
         int ksize2 = _ksize / 2;
         const float* ky = kernel.ptr<float>() + ksize2;
         int i = 0, k;
@@ -1416,25 +1529,49 @@ struct SymmColumnVec_32f16s
         v_float32 d4 = vx_setall_f32(delta);
         if( symmetrical )
         {
-            if (_ksize == 1)
-                return 0;
             v_float32 k0 = vx_setall_f32(ky[0]);
-            for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+            v_float32 k1 = vx_setall_f32(ky[1]);
+            for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
             {
                 v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
                 v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), k0, d4);
-                for( k = 1; k <= ksize2; k++ )
+                v_float32 s2 = v_muladd(vx_load(src[0] + i + 2*v_float32::nlanes), k0, d4);
+                v_float32 s3 = v_muladd(vx_load(src[0] + i + 3*v_float32::nlanes), k0, d4);
+                s0 = v_muladd(vx_load(src[1] + i) + vx_load(src[-1] + i), k1, s0);
+                s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) + vx_load(src[-1] + i + v_float32::nlanes), k1, s1);
+                s2 = v_muladd(vx_load(src[1] + i + 2*v_float32::nlanes) + vx_load(src[-1] + i + 2*v_float32::nlanes), k1, s2);
+                s3 = v_muladd(vx_load(src[1] + i + 3*v_float32::nlanes) + vx_load(src[-1] + i + 3*v_float32::nlanes), k1, s3);
+                for( k = 2; k <= ksize2; k++ )
                 {
-                    v_float32 k1 = vx_setall_f32(ky[k]);
-                    s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), k1, s0);
-                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) + vx_load(src[-k] + i + v_float32::nlanes), k1, s1);
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) + vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
+                    s2 = v_muladd(vx_load(src[k] + i + 2*v_float32::nlanes) + vx_load(src[-k] + i + 2*v_float32::nlanes), k2, s2);
+                    s3 = v_muladd(vx_load(src[k] + i + 3*v_float32::nlanes) + vx_load(src[-k] + i + 3*v_float32::nlanes), k2, s3);
+                }
+                v_store(dst + i, v_pack(v_round(s0), v_round(s1)));
+                v_store(dst + i + v_int16::nlanes, v_pack(v_round(s2), v_round(s3)));
+            }
+            if( i <= width - v_int16::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
+                v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), k0, d4);
+                s0 = v_muladd(vx_load(src[1] + i) + vx_load(src[-1] + i), k1, s0);
+                s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) + vx_load(src[-1] + i + v_float32::nlanes), k1, s1);
+                for( k = 2; k <= ksize2; k++ )
+                {
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) + vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
                 }
                 v_store(dst + i, v_pack(v_round(s0), v_round(s1)));
+                i += v_int16::nlanes;
             }
             if( i <= width - v_float32::nlanes )
             {
                 v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
-                for( k = 1; k <= ksize2; k++ )
+                s0 = v_muladd(vx_load(src[1] + i) + vx_load(src[-1] + i), k1, s0);
+                for( k = 2; k <= ksize2; k++ )
                     s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), vx_setall_f32(ky[k]), s0);
                 v_pack_store(dst + i, v_round(s0));
                 i += v_float32::nlanes;
@@ -1442,28 +1579,48 @@ struct SymmColumnVec_32f16s
         }
         else
         {
-            for( ; i <= width - v_int16::nlanes; i += v_int16::nlanes )
+            v_float32 k1 = vx_setall_f32(ky[1]);
+            for( ; i <= width - 2*v_int16::nlanes; i += 2*v_int16::nlanes )
             {
-                v_float32 s0 = d4;
-                v_float32 s1 = d4;
-                for( k = 1; k <= ksize2; k++ )
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                v_float32 s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) - vx_load(src[-1] + i + v_float32::nlanes), k1, d4);
+                v_float32 s2 = v_muladd(vx_load(src[1] + i + 2*v_float32::nlanes) - vx_load(src[-1] + i + 2*v_float32::nlanes), k1, d4);
+                v_float32 s3 = v_muladd(vx_load(src[1] + i + 3*v_float32::nlanes) - vx_load(src[-1] + i + 3*v_float32::nlanes), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
                 {
-                    v_float32 k1 = vx_setall_f32(ky[k]);
-                    s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), k1, s0);
-                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) - vx_load(src[-k] + i + v_float32::nlanes), k1, s1);
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) - vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
+                    s0 = v_muladd(vx_load(src[k] + i + 2*v_float32::nlanes) - vx_load(src[-k] + i + 2*v_float32::nlanes), k2, s2);
+                    s1 = v_muladd(vx_load(src[k] + i + 3*v_float32::nlanes) - vx_load(src[-k] + i + 3*v_float32::nlanes), k2, s3);
+                }
+                v_store(dst + i, v_pack(v_round(s0), v_round(s1)));
+                v_store(dst + i + v_int16::nlanes, v_pack(v_round(s2), v_round(s3)));
+            }
+            if( i <= width - v_int16::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                v_float32 s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) - vx_load(src[-1] + i + v_float32::nlanes), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
+                {
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) - vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
                 }
                 v_store(dst + i, v_pack(v_round(s0), v_round(s1)));
+                i += v_int16::nlanes;
             }
             if( i <= width - v_float32::nlanes )
             {
-                v_float32 s0 = d4;
-                for( k = 1; k <= ksize2; k++ )
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
                     s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), vx_setall_f32(ky[k]), s0);
                 v_pack_store(dst + i, v_round(s0));
                 i += v_float32::nlanes;
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1505,6 +1662,7 @@ struct RowVec_32f
         }
 #endif
         int _ksize = kernel.rows + kernel.cols - 1;
+        CV_DbgAssert(_ksize > 0);
         const float* src0 = (const float*)_src;
         float* dst = (float*)_dst;
         const float* _kx = kernel.ptr<float>();
@@ -1516,14 +1674,55 @@ struct RowVec_32f
         if (haveAVX2)
             return RowVec_32f_AVX(src0, _kx, dst, width, cn, _ksize);
 #endif
-        for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+        v_float32 k0 = vx_setall_f32(_kx[0]);
+        for( ; i <= width - 4*v_float32::nlanes; i += 4*v_float32::nlanes )
         {
             const float* src = src0 + i;
-            v_float32 s0 = vx_setzero_f32();
-            for( k = 0; k < _ksize; k++, src += cn )
+            v_float32 s0 = vx_load(src) * k0;
+            v_float32 s1 = vx_load(src + v_float32::nlanes) * k0;
+            v_float32 s2 = vx_load(src + 2*v_float32::nlanes) * k0;
+            v_float32 s3 = vx_load(src + 3*v_float32::nlanes) * k0;
+            src += cn;
+            for( k = 1; k < _ksize; k++, src += cn )
+            {
+                v_float32 k1 = vx_setall_f32(_kx[k]);
+                s0 = v_muladd(vx_load(src), k1, s0);
+                s1 = v_muladd(vx_load(src + v_float32::nlanes), k1, s1);
+                s2 = v_muladd(vx_load(src + 2*v_float32::nlanes), k1, s2);
+                s3 = v_muladd(vx_load(src + 3*v_float32::nlanes), k1, s3);
+            }
+            v_store(dst + i, s0);
+            v_store(dst + i + v_float32::nlanes, s1);
+            v_store(dst + i + 2*v_float32::nlanes, s2);
+            v_store(dst + i + 3*v_float32::nlanes, s3);
+        }
+        if( i <= width - 2*v_float32::nlanes )
+        {
+            const float* src = src0 + i;
+            v_float32 s0 = vx_load(src) * k0;
+            v_float32 s1 = vx_load(src + v_float32::nlanes) * k0;
+            src += cn;
+            for( k = 1; k < _ksize; k++, src += cn )
+            {
+                v_float32 k1 = vx_setall_f32(_kx[k]);
+                s0 = v_muladd(vx_load(src), k1, s0);
+                s1 = v_muladd(vx_load(src + v_float32::nlanes), k1, s1);
+            }
+            v_store(dst + i, s0);
+            v_store(dst + i + v_float32::nlanes, s1);
+            i += 2*v_float32::nlanes;
+        }
+        if( i <= width - v_float32::nlanes )
+        {
+            const float* src = src0 + i;
+            v_float32 s0 = vx_load(src) * k0;
+            src += cn;
+            for( k = 1; k < _ksize; k++, src += cn )
                 s0 = v_muladd(vx_load(src), vx_setall_f32(_kx[k]), s0);
             v_store(dst + i, s0);
+            i += v_float32::nlanes;
         }
+        vx_cleanup();
         return i;
     }
 
@@ -1584,6 +1783,8 @@ struct SymmRowSmallVec_32f
     int operator()(const uchar* _src, uchar* _dst, int width, int cn) const
     {
         int i = 0, _ksize = kernel.rows + kernel.cols - 1;
+        if( _ksize == 1 )
+            return 0;
         float* dst = (float*)_dst;
         const float* src = (const float*)_src + (_ksize/2)*cn;
         bool symmetrical = (symmetryType & KERNEL_SYMMETRICAL) != 0;
@@ -1592,15 +1793,28 @@ struct SymmRowSmallVec_32f
 
         if( symmetrical )
         {
-            if( _ksize == 1 )
-                return 0;
             if( _ksize == 3 )
             {
                 if( fabs(kx[0]) == 2 && kx[1] == 1 )
                 {
+#if CV_FMA3 || CV_AVX2
                     v_float32 k0 = vx_setall_f32(kx[0]);
                     for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes, src += v_float32::nlanes )
                         v_store(dst + i, v_muladd(vx_load(src), k0, vx_load(src - cn) + vx_load(src + cn)));
+#else
+                    if( kx[0] > 0 )
+                        for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes, src += v_float32::nlanes )
+                        {
+                            v_float32 x = vx_load(src);
+                            v_store(dst + i, vx_load(src - cn) + vx_load(src + cn) + (x + x));
+                        }
+                    else
+                        for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes, src += v_float32::nlanes )
+                        {
+                            v_float32 x = vx_load(src);
+                            v_store(dst + i, vx_load(src - cn) + vx_load(src + cn) - (x + x));
+                        }
+#endif
                 }
                 else
                 {
@@ -1613,9 +1827,17 @@ struct SymmRowSmallVec_32f
             {
                 if( kx[0] == -2 && kx[1] == 0 && kx[2] == 1 )
                 {
+#if CV_FMA3 || CV_AVX2
                     v_float32 k0 = vx_setall_f32(-2);
                     for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes, src += v_float32::nlanes )
                         v_store(dst + i, v_muladd(vx_load(src), k0, vx_load(src - 2*cn) + vx_load(src + 2*cn)));
+#else
+                    for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes, src += v_float32::nlanes )
+                    {
+                        v_float32 x = vx_load(src);
+                        v_store(dst + i, vx_load(src - 2*cn) + vx_load(src + 2*cn) - (x + x));
+                    }
+#endif
                 }
                 else
                 {
@@ -1647,6 +1869,7 @@ struct SymmRowSmallVec_32f
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1688,12 +1911,47 @@ struct SymmColumnVec_32f
                 return SymmColumnVec_32f_Symm_AVX(src, ky, dst, delta, width, ksize2);
 #endif
             const v_float32 d4 = vx_setall_f32(delta);
-            for ( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+            const v_float32 k0 = vx_setall_f32(ky[0]);
+            for( ; i <= width - 4*v_float32::nlanes; i += 4*v_float32::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
+                v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), k0, d4);
+                v_float32 s2 = v_muladd(vx_load(src[0] + i + 2*v_float32::nlanes), k0, d4);
+                v_float32 s3 = v_muladd(vx_load(src[0] + i + 3*v_float32::nlanes), k0, d4);
+                for( k = 1; k <= ksize2; k++ )
+                {
+                    v_float32 k1 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), k1, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) + vx_load(src[-k] + i + v_float32::nlanes), k1, s1);
+                    s2 = v_muladd(vx_load(src[k] + i + 2*v_float32::nlanes) + vx_load(src[-k] + i + 2*v_float32::nlanes), k1, s2);
+                    s3 = v_muladd(vx_load(src[k] + i + 3*v_float32::nlanes) + vx_load(src[-k] + i + 3*v_float32::nlanes), k1, s3);
+                }
+                v_store(dst + i, s0);
+                v_store(dst + i + v_float32::nlanes, s1);
+                v_store(dst + i + 2*v_float32::nlanes, s2);
+                v_store(dst + i + 3*v_float32::nlanes, s3);
+            }
+            if( i <= width - 2*v_float32::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
+                v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), k0, d4);
+                for( k = 1; k <= ksize2; k++ )
+                {
+                    v_float32 k1 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), k1, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) + vx_load(src[-k] + i + v_float32::nlanes), k1, s1);
+                }
+                v_store(dst + i, s0);
+                v_store(dst + i + v_float32::nlanes, s1);
+                i += 2*v_float32::nlanes;
+            }
+            if( i <= width - v_float32::nlanes )
             {
-                v_float32 s0 = v_muladd(vx_load(src[0] + i), vx_setall_f32(ky[0]), d4);
+                v_float32 s0 = v_muladd(vx_load(src[0] + i), k0, d4);
                 for( k = 1; k <= ksize2; k++ )
                     s0 = v_muladd(vx_load(src[k] + i) + vx_load(src[-k] + i), vx_setall_f32(ky[k]), s0);
                 v_store(dst + i, s0);
+                i += v_float32::nlanes;
             }
         }
         else
@@ -1702,16 +1960,53 @@ struct SymmColumnVec_32f
             if (haveAVX2)
                 return SymmColumnVec_32f_Unsymm_AVX(src, ky, dst, delta, width, ksize2);
 #endif
+            CV_DbgAssert(ksize2 > 0);
             const v_float32 d4 = vx_setall_f32(delta);
-            for ( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+            const v_float32 k1 = vx_setall_f32(ky[1]);
+            for( ; i <= width - 4*v_float32::nlanes; i += 4*v_float32::nlanes )
             {
-                v_float32 s0 = d4;
-                for( k = 1; k <= ksize2; k++ )
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                v_float32 s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) - vx_load(src[-1] + i + v_float32::nlanes), k1, d4);
+                v_float32 s2 = v_muladd(vx_load(src[1] + i + 2*v_float32::nlanes) - vx_load(src[-1] + i + 2*v_float32::nlanes), k1, d4);
+                v_float32 s3 = v_muladd(vx_load(src[1] + i + 3*v_float32::nlanes) - vx_load(src[-1] + i + 3*v_float32::nlanes), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
+                {
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) - vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
+                    s2 = v_muladd(vx_load(src[k] + i + 2*v_float32::nlanes) - vx_load(src[-k] + i + 2*v_float32::nlanes), k2, s2);
+                    s3 = v_muladd(vx_load(src[k] + i + 3*v_float32::nlanes) - vx_load(src[-k] + i + 3*v_float32::nlanes), k2, s3);
+                }
+                v_store(dst + i, s0);
+                v_store(dst + i + v_float32::nlanes, s1);
+                v_store(dst + i + 2*v_float32::nlanes, s2);
+                v_store(dst + i + 3*v_float32::nlanes, s3);
+            }
+            if( i <= width - 2*v_float32::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                v_float32 s1 = v_muladd(vx_load(src[1] + i + v_float32::nlanes) - vx_load(src[-1] + i + v_float32::nlanes), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
+                {
+                    v_float32 k2 = vx_setall_f32(ky[k]);
+                    s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), k2, s0);
+                    s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes) - vx_load(src[-k] + i + v_float32::nlanes), k2, s1);
+                }
+                v_store(dst + i, s0);
+                v_store(dst + i + v_float32::nlanes, s1);
+                i += 2*v_float32::nlanes;
+            }
+            if( i <= width - v_float32::nlanes )
+            {
+                v_float32 s0 = v_muladd(vx_load(src[1] + i) - vx_load(src[-1] + i), k1, d4);
+                for( k = 2; k <= ksize2; k++ )
                     s0 = v_muladd(vx_load(src[k] + i) - vx_load(src[-k] + i), vx_setall_f32(ky[k]), s0);
                 v_store(dst + i, s0);
+                i += v_float32::nlanes;
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1748,9 +2043,24 @@ struct SymmColumnSmallVec_32f
         {
             if( fabs(ky[0]) == 2 && ky[1] == 1 )
             {
+#if CV_FMA3 || CV_AVX2
                 v_float32 k0 = vx_setall_f32(ky[0]);
-                for ( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+                for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
                     v_store(dst + i, v_muladd(vx_load(S1 + i), k0, vx_load(S0 + i) + vx_load(S2 + i) + d4));
+#else
+                if(ky[0] > 0)
+                    for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+                    {
+                        v_float32 x = vx_load(S1 + i);
+                        v_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + d4 + (x + x));
+                    }
+                else
+                    for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+                    {
+                        v_float32 x = vx_load(S1 + i);
+                        v_store(dst + i, vx_load(S0 + i) + vx_load(S2 + i) + d4 - (x + x));
+                    }
+#endif
             }
             else
             {
@@ -1776,6 +2086,7 @@ struct SymmColumnSmallVec_32f
             }
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1804,19 +2115,27 @@ struct FilterVec_8u
 
     int operator()(const uchar** src, uchar* dst, int width) const
     {
+        CV_DbgAssert(_nz > 0);
         const float* kf = (const float*)&coeffs[0];
         int i = 0, k, nz = _nz;
 
         v_float32 d4 = vx_setall_f32(delta);
+        v_float32 f0 = vx_setall_f32(kf[0]);
         for( ; i <= width - v_uint8::nlanes; i += v_uint8::nlanes )
         {
-            v_float32 s0 = d4, s1 = d4, s2 = d4, s3 = d4;
-            for( k = 0; k < nz; k++ )
+            v_uint16 xl, xh;
+            v_expand(vx_load(src[0] + i), xl, xh);
+            v_uint32 x0, x1, x2, x3;
+            v_expand(xl, x0, x1);
+            v_expand(xh, x2, x3);
+            v_float32 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x0)), f0, d4);
+            v_float32 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x1)), f0, d4);
+            v_float32 s2 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x2)), f0, d4);
+            v_float32 s3 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x3)), f0, d4);
+            for( k = 1; k < nz; k++ )
             {
                 v_float32 f = vx_setall_f32(kf[k]);
-                v_uint16 xl, xh;
                 v_expand(vx_load(src[k] + i), xl, xh);
-                v_uint32 x0, x1, x2, x3;
                 v_expand(xl, x0, x1);
                 v_expand(xh, x2, x3);
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x0)), f, s0);
@@ -1828,11 +2147,13 @@ struct FilterVec_8u
         }
         if( i <= width - v_uint16::nlanes )
         {
-            v_float32 s0 = d4, s1 = d4;
-            for( k = 0; k < nz; k++ )
+            v_uint32 x0, x1;
+            v_expand(vx_load_expand(src[0] + i), x0, x1);
+            v_float32 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x0)), f0, d4);
+            v_float32 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x1)), f0, d4);
+            for( k = 1; k < nz; k++ )
             {
                 v_float32 f = vx_setall_f32(kf[k]);
-                v_uint32 x0, x1;
                 v_expand(vx_load_expand(src[k] + i), x0, x1);
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x0)), f, s0);
                 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(x1)), f, s1);
@@ -1846,8 +2167,8 @@ struct FilterVec_8u
         if( i <= width - v_int32x4::nlanes )
 #endif
         {
-            v_float32x4 s0 = v_setall_f32(delta);
-            for( k = 0; k < nz; k++ )
+            v_float32x4 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_load_expand_q(src[0] + i))), v_setall_f32(kf[0]), v_setall_f32(delta));
+            for( k = 1; k < nz; k++ )
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_load_expand_q(src[k] + i))), v_setall_f32(kf[k]), s0);
             v_int32x4 s32 = v_round(s0);
             v_int16x8 s16 = v_pack(s32, s32);
@@ -1855,6 +2176,7 @@ struct FilterVec_8u
             i += v_int32x4::nlanes;
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1879,18 +2201,24 @@ struct FilterVec_8u16s
 
     int operator()(const uchar** src, uchar* _dst, int width) const
     {
+        CV_DbgAssert(_nz > 0);
         const float* kf = (const float*)&coeffs[0];
         short* dst = (short*)_dst;
         int i = 0, k, nz = _nz;
 
         v_float32 d4 = vx_setall_f32(delta);
+        v_float32 f0 = vx_setall_f32(kf[0]);
         for( ; i <= width - v_uint8::nlanes; i += v_uint8::nlanes )
         {
-            v_float32 s0 = d4, s1 = d4, s2 = d4, s3 = d4;
-            for( k = 0; k < nz; k++ )
+            v_uint16 xl, xh;
+            v_expand(vx_load(src[0] + i), xl, xh);
+            v_float32 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_low(xl))), f0, d4);
+            v_float32 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_high(xl))), f0, d4);
+            v_float32 s2 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_low(xh))), f0, d4);
+            v_float32 s3 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_high(xh))), f0, d4);
+            for( k = 1; k < nz; k++ )
             {
                 v_float32 f = vx_setall_f32(kf[k]);
-                v_uint16 xl, xh;
                 v_expand(vx_load(src[k] + i), xl, xh);
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_low(xl))), f, s0);
                 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_high(xl))), f, s1);
@@ -1902,11 +2230,13 @@ struct FilterVec_8u16s
         }
         if( i <= width - v_uint16::nlanes )
         {
-            v_float32 s0 = d4, s1 = d4;
-            for( k = 0; k < nz; k++ )
+            v_uint16 x = vx_load_expand(src[0] + i);
+            v_float32 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_low(x))), f0, d4);
+            v_float32 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_high(x))), f0, d4);
+            for( k = 1; k < nz; k++ )
             {
                 v_float32 f = vx_setall_f32(kf[k]);
-                v_uint16 x = vx_load_expand(src[k] + i);
+                x = vx_load_expand(src[k] + i);
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_low(x))), f, s0);
                 s1 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(v_expand_high(x))), f, s1);
             }
@@ -1915,13 +2245,14 @@ struct FilterVec_8u16s
         }
         if( i <= width - v_int32::nlanes )
         {
-            v_float32 s0 = d4;
-            for( k = 0; k < nz; k++ )
+            v_float32 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(vx_load_expand_q(src[0] + i))), f0, d4);
+            for( k = 1; k < nz; k++ )
                 s0 = v_muladd(v_cvt_f32(v_reinterpret_as_s32(vx_load_expand_q(src[k] + i))), vx_setall_f32(kf[k]), s0);
             v_pack_store(dst + i, v_round(s0));
             i += v_int32::nlanes;
         }
 
+        vx_cleanup();
         return i;
     }
 
@@ -1950,14 +2281,50 @@ struct FilterVec_32f
         int i = 0, k, nz = _nz;
 
         v_float32 d4 = vx_setall_f32(delta);
-        for( ; i <= width - v_float32::nlanes; i += v_float32::nlanes )
+        v_float32 f0 = vx_setall_f32(kf[0]);
+        for( ; i <= width - 4*v_float32::nlanes; i += 4*v_float32::nlanes )
         {
-            v_float32 s0 = d4;
-            for( k = 0; k < nz; k++ )
+            v_float32 s0 = v_muladd(vx_load(src[0] + i), f0, d4);
+            v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), f0, d4);
+            v_float32 s2 = v_muladd(vx_load(src[0] + i + 2*v_float32::nlanes), f0, d4);
+            v_float32 s3 = v_muladd(vx_load(src[0] + i + 3*v_float32::nlanes), f0, d4);
+            for( k = 1; k < nz; k++ )
+            {
+                v_float32 f1 = vx_setall_f32(kf[k]);
+                s0 = v_muladd(vx_load(src[k] + i), f1, s0);
+                s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes), f1, s1);
+                s2 = v_muladd(vx_load(src[k] + i + 2*v_float32::nlanes), f1, s2);
+                s3 = v_muladd(vx_load(src[k] + i + 3*v_float32::nlanes), f1, s3);
+            }
+            v_store(dst + i, s0);
+            v_store(dst + i + v_float32::nlanes, s1);
+            v_store(dst + i + 2*v_float32::nlanes, s2);
+            v_store(dst + i + 3*v_float32::nlanes, s3);
+        }
+        if( i <= width - 2*v_float32::nlanes )
+        {
+            v_float32 s0 = v_muladd(vx_load(src[0] + i), f0, d4);
+            v_float32 s1 = v_muladd(vx_load(src[0] + i + v_float32::nlanes), f0, d4);
+            for( k = 1; k < nz; k++ )
+            {
+                v_float32 f1 = vx_setall_f32(kf[k]);
+                s0 = v_muladd(vx_load(src[k] + i), f1, s0);
+                s1 = v_muladd(vx_load(src[k] + i + v_float32::nlanes), f1, s1);
+            }
+            v_store(dst + i, s0);
+            v_store(dst + i + v_float32::nlanes, s1);
+            i += 2*v_float32::nlanes;
+        }
+        if( i <= width - v_float32::nlanes )
+        {
+            v_float32 s0 = v_muladd(vx_load(src[0] + i), f0, d4);
+            for( k = 1; k < nz; k++ )
                 s0 = v_muladd(vx_load(src[k] + i), vx_setall_f32(kf[k]), s0);
             v_store(dst + i, s0);
+            i += v_float32::nlanes;
         }
 
+        vx_cleanup();
         return i;
     }