diff --git a/modules/calib3d/src/stereobm.cpp b/modules/calib3d/src/stereobm.cpp
index 92a0238213..0257fd572b 100644
--- a/modules/calib3d/src/stereobm.cpp
+++ b/modules/calib3d/src/stereobm.cpp
@@ -204,10 +204,6 @@ prefilterXSobel( const Mat& src, Mat& dst, int ftzero )
         tab[x] = (uchar)(x - OFS < -ftzero ? 0 : x - OFS > ftzero ? ftzero*2 : x - OFS + ftzero);
     uchar val0 = tab[0 + OFS];
 
-#if CV_SIMD128
-    bool useSIMD = hasSIMD128();
-#endif
-
     for( y = 0; y < size.height-1; y += 2 )
     {
         const uchar* srow1 = src.ptr<uchar>(y);
@@ -221,7 +217,6 @@ prefilterXSobel( const Mat& src, Mat& dst, int ftzero )
         x = 1;
 
 #if CV_SIMD128
-        if( useSIMD )
         {
             v_int16x8 ftz = v_setall_s16((short) ftzero);
             v_int16x8 ftz2 = v_setall_s16((short)(ftzero*2));
@@ -268,7 +263,6 @@ prefilterXSobel( const Mat& src, Mat& dst, int ftzero )
         uchar* dptr = dst.ptr<uchar>(y);
         x = 0;
 #if CV_SIMD128
-        if( useSIMD )
         {
             v_uint8x16 val0_16 = v_setall_u8(val0);
             for(; x <= size.width-16; x+=16 )
@@ -594,8 +588,6 @@ findStereoCorrespondenceBM( const Mat& left, const Mat& right,
     mType FILTERED = (mType)((mindisp - 1) << disp_shift);
 
 #if CV_SIMD128
-    bool useSIMD = hasSIMD128();
-    if( useSIMD )
     {
         CV_Assert (ndisp % 8 == 0);
     }
@@ -637,7 +629,6 @@ findStereoCorrespondenceBM( const Mat& left, const Mat& right,
             int lval = lptr[0];
             d = 0;
 #if CV_SIMD128
-            if( useSIMD )
             {
                 v_uint8x16 lv = v_setall_u8((uchar)lval);
 
@@ -706,7 +697,6 @@ findStereoCorrespondenceBM( const Mat& left, const Mat& right,
             int lval = lptr[0];
             d = 0;
 #if CV_SIMD128
-            if( useSIMD )
             {
                 v_uint8x16 lv = v_setall_u8((uchar)lval);
                 for( ; d <= ndisp - 16; d += 16 )
@@ -769,7 +759,6 @@ findStereoCorrespondenceBM( const Mat& left, const Mat& right,
         {
             d = 0;
 #if CV_SIMD128
-            if( useSIMD )
             {
                 for( d = 0; d <= ndisp-8; d += 8 )
                 {
@@ -799,7 +788,6 @@ findStereoCorrespondenceBM( const Mat& left, const Mat& right,
             hsad_sub = hsad0 + MAX(y - wsz2 - 1, -dy0)*ndisp;
             d = 0;
 #if CV_SIMD128
-            if( useSIMD )
             {
                 v_int32x4 d0_4 = v_int32x4(0, 1, 2, 3);
                 v_int32x4 dd_4 = v_setall_s32(4);
@@ -1003,9 +991,6 @@ struct FindStereoCorrespInvoker : public ParallelLoopBody
         validDisparityRect = _validDisparityRect;
         slidingSumBuf = &_slidingSumBuf;
         cost = &_cost;
-#if CV_SIMD128
-        useSIMD = hasSIMD128();
-#endif
     }
 
     void operator()(const Range& range) const CV_OVERRIDE
@@ -1043,7 +1028,7 @@ struct FindStereoCorrespInvoker : public ParallelLoopBody
         Mat cost_i = state->disp12MaxDiff >= 0 ? cost->rowRange(row0, row1) : Mat();
 
 #if CV_SIMD128
-        if( useSIMD && useShorts )
+        if (useShorts)
         {
             if( disp_i.type() == CV_16S)
                 findStereoCorrespondenceBM_SIMD<short>( left_i, right_i, disp_i, cost_i, *state, ptr, row0, rows - row1 );
@@ -1083,7 +1068,6 @@ protected:
     size_t stripeBufSize;
     bool useShorts;
     Rect validDisparityRect;
-    bool useSIMD;
 };
 
 class StereoBMImpl CV_FINAL : public StereoBM
diff --git a/modules/calib3d/src/stereosgbm.cpp b/modules/calib3d/src/stereosgbm.cpp
index cd198885f0..afc57c4cb2 100644
--- a/modules/calib3d/src/stereosgbm.cpp
+++ b/modules/calib3d/src/stereosgbm.cpp
@@ -140,9 +140,6 @@ static void calcPixelCostBT( const Mat& img1, const Mat& img2, int y,
     int width2 = maxX2 - minX2;
     const PixType *row1 = img1.ptr<PixType>(y), *row2 = img2.ptr<PixType>(y);
     PixType *prow1 = buffer + width2*2, *prow2 = prow1 + width*cn*2;
-#if CV_SIMD128
-    bool useSIMD = hasSIMD128();
-#endif
 
     tab += tabOfs;
 
@@ -224,7 +221,7 @@ static void calcPixelCostBT( const Mat& img1, const Mat& img2, int y,
             int u1 = std::max(ul, ur); u1 = std::max(u1, u);
 
         #if CV_SIMD128
-            if( useSIMD )
+            if (true)
             {
                 v_uint8x16 _u  = v_setall_u8((uchar)u), _u0 = v_setall_u8((uchar)u0);
                 v_uint8x16 _u1 = v_setall_u8((uchar)u1);
@@ -304,8 +301,6 @@ static void computeDisparitySGBM( const Mat& img1, const Mat& img2,
         5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0
     };
     static const v_uint16x8 v_LSB = v_uint16x8(0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80);
-
-    bool useSIMD = hasSIMD128();
 #endif
 
     const int ALIGN = 16;
@@ -450,7 +445,7 @@ static void computeDisparitySGBM( const Mat& img1, const Mat& img2,
                                 const CostType* pixSub = pixDiff + std::max(x - (SW2+1)*D, 0);
 
                             #if CV_SIMD128
-                                if( useSIMD )
+                                if (true)
                                 {
                                     for( d = 0; d < D; d += 8 )
                                     {
@@ -547,7 +542,7 @@ static void computeDisparitySGBM( const Mat& img1, const Mat& img2,
                 CostType* Sp = S + x*D;
 
             #if CV_SIMD128
-                if( useSIMD )
+                if (true)
                 {
                     v_int16x8 _P1 = v_setall_s16((short)P1);
 
@@ -681,7 +676,7 @@ static void computeDisparitySGBM( const Mat& img1, const Mat& img2,
                         const CostType* Cp = C + x*D;
 
                     #if CV_SIMD128
-                        if( useSIMD )
+                        if (true)
                         {
                             v_int16x8 _P1 = v_setall_s16((short)P1);
                             v_int16x8 _delta0 = v_setall_s16((short)delta0);
@@ -753,7 +748,7 @@ static void computeDisparitySGBM( const Mat& img1, const Mat& img2,
                     else
                     {
                     #if CV_SIMD128
-                        if( useSIMD )
+                        if (true)
                         {
                             v_int16x8 _minS = v_setall_s16(MAX_COST), _bestDisp = v_setall_s16(-1);
                             v_int16x8 _d8 = v_int16x8(0, 1, 2, 3, 4, 5, 6, 7), _8 = v_setall_s16(8);
@@ -868,7 +863,6 @@ struct CalcVerticalSums: public ParallelLoopBody
         Cbuf = alignedBuf;
         Sbuf = Cbuf + CSBufSize;
         hsumBuf = Sbuf + CSBufSize;
-        useSIMD = hasSIMD128();
     }
 
     void operator()(const Range& range) const CV_OVERRIDE
@@ -957,7 +951,7 @@ struct CalcVerticalSums: public ParallelLoopBody
                                     const CostType* pixSub = pixDiff + std::max(x - (SW2+1)*D, 0);
 
                                 #if CV_SIMD128
-                                    if( useSIMD )
+                                    if (true)
                                     {
                                         for( d = 0; d < D; d += 8 )
                                         {
@@ -1034,7 +1028,7 @@ struct CalcVerticalSums: public ParallelLoopBody
                     CostType* Sp = S + x*D;
 
                 #if CV_SIMD128
-                    if( useSIMD )
+                    if (true)
                     {
                         v_int16x8 _P1 = v_setall_s16((short)P1);
 
@@ -1121,7 +1115,6 @@ struct CalcVerticalSums: public ParallelLoopBody
     size_t LrSize;
     size_t hsumBufNRows;
     int ftzero;
-    bool useSIMD;
 };
 
 struct CalcHorizontalSums: public ParallelLoopBody
@@ -1149,7 +1142,6 @@ struct CalcHorizontalSums: public ParallelLoopBody
         LrSize = 2 * D2;
         Cbuf = alignedBuf;
         Sbuf = Cbuf + CSBufSize;
-        useSIMD = hasSIMD128();
     }
 
     void operator()(const Range& range) const CV_OVERRIDE
@@ -1204,7 +1196,7 @@ struct CalcHorizontalSums: public ParallelLoopBody
                 CostType* Sp = S + x*D;
 
             #if CV_SIMD128
-                if( useSIMD )
+                if (true)
                 {
                     v_int16x8 _P1 = v_setall_s16((short)P1);
 
@@ -1277,7 +1269,7 @@ struct CalcHorizontalSums: public ParallelLoopBody
                 minLr = MAX_COST;
 
             #if CV_SIMD128
-                if( useSIMD )
+                if (true)
                 {
                     v_int16x8 _P1 = v_setall_s16((short)P1);
 
@@ -1424,7 +1416,6 @@ struct CalcHorizontalSums: public ParallelLoopBody
     int INVALID_DISP_SCALED;
     int uniquenessRatio;
     int disp12MaxDiff;
-    bool useSIMD;
 };
 /*
  computes disparity for "roi" in img1 w.r.t. img2 and write it to disp1buf.
@@ -1536,10 +1527,6 @@ struct SGBM3WayMainLoop : public ParallelLoopBody
     int costBufSize, hsumBufNRows;
     int TAB_OFS, ftzero;
 
-#if CV_SIMD128
-    bool useSIMD;
-#endif
-
     PixType* clipTab;
 
     SGBM3WayMainLoop(Mat *_buffers, const Mat& _img1, const Mat& _img2, Mat* _dst_disp, const StereoSGBMParams& params, PixType* _clipTab, int _nstripes, int _stripe_overlap);
@@ -1569,10 +1556,6 @@ buffers(_buffers), img1(&_img1), img2(&_img2), dst_disp(_dst_disp), clipTab(_cli
     hsumBufNRows = SH2*2 + 2;
     TAB_OFS = 256*4;
     ftzero = std::max(params.preFilterCap, 15) | 1;
-
-#if CV_SIMD128
-    useSIMD = hasSIMD128();
-#endif
 }
 
 void getBufferPointers(Mat& buffer, int width, int width1, int D, int num_ch, int SH2, int P2,
@@ -1673,7 +1656,7 @@ void SGBM3WayMainLoop::getRawMatchingCost(CostType* C, // target cost-volume row
                     const CostType* pixSub = pixDiff + std::max(x - (SW2+1)*D, 0);
 
 #if CV_SIMD128
-                    if(useSIMD)
+                    if (true)
                     {
                         v_int16x8 hv_reg;
                         for( d = 0; d < D; d+=8 )
@@ -1734,7 +1717,7 @@ inline void accumulateCostsLeftTop(CostType* leftBuf, CostType* leftBuf_prev, Co
                                    CostType& leftMinCost, CostType& topMinCost, int D, int P1, int P2)
 {
 #if CV_SIMD128
-    if(hasSIMD128())
+    if (true)
     {
         v_int16x8 P1_reg = v_setall_s16(cv::saturate_cast<CostType>(P1));
 
@@ -1846,7 +1829,7 @@ inline void accumulateCostsRight(CostType* rightBuf, CostType* topBuf, CostType*
                                  CostType& rightMinCost, int D, int P1, int P2, int& optimal_disp, CostType& min_cost)
 {
 #if CV_SIMD128
-    if(hasSIMD128())
+    if (true)
     {
         v_int16x8 P1_reg = v_setall_s16(cv::saturate_cast<CostType>(P1));
 
@@ -2012,7 +1995,7 @@ void SGBM3WayMainLoop::operator () (const Range& range) const
             if(uniquenessRatio>0)
             {
 #if CV_SIMD128
-                if(useSIMD)
+                if (true)
                 {
                     horPassCostVolume+=x;
                     int thresh = (100*min_cost)/(100-uniquenessRatio);
diff --git a/modules/core/include/opencv2/core/hal/intrin_avx.hpp b/modules/core/include/opencv2/core/hal/intrin_avx.hpp
index f765c22a10..15ec47f7ef 100644
--- a/modules/core/include/opencv2/core/hal/intrin_avx.hpp
+++ b/modules/core/include/opencv2/core/hal/intrin_avx.hpp
@@ -2774,15 +2774,6 @@ inline void v_pack_store(float16_t* ptr, const v_float32x8& a)
 
 inline void v256_cleanup() { _mm256_zeroall(); }
 
-//! @name Check SIMD256 support
-//! @{
-//! @brief Check CPU capability of SIMD operation
-static inline bool hasSIMD256()
-{
-    return (CV_CPU_HAS_SUPPORT_AVX2) ? true : false;
-}
-//! @}
-
 CV_CPU_OPTIMIZATION_HAL_NAMESPACE_END
 
 //! @endcond
diff --git a/modules/core/include/opencv2/core/hal/intrin_cpp.hpp b/modules/core/include/opencv2/core/hal/intrin_cpp.hpp
index 97756af5fa..f069609a0d 100644
--- a/modules/core/include/opencv2/core/hal/intrin_cpp.hpp
+++ b/modules/core/include/opencv2/core/hal/intrin_cpp.hpp
@@ -2357,16 +2357,6 @@ inline void v_cleanup() {}
 
 //! @}
 
-//! @name Check SIMD support
-//! @{
-//! @brief Check CPU capability of SIMD operation
-static inline bool hasSIMD128()
-{
-    return false;
-}
-
-//! @}
-
 #ifndef CV_DOXYGEN
 CV_CPU_OPTIMIZATION_HAL_NAMESPACE_END
 #endif
diff --git a/modules/core/include/opencv2/core/hal/intrin_neon.hpp b/modules/core/include/opencv2/core/hal/intrin_neon.hpp
index 468872a677..9547a860db 100644
--- a/modules/core/include/opencv2/core/hal/intrin_neon.hpp
+++ b/modules/core/include/opencv2/core/hal/intrin_neon.hpp
@@ -1910,16 +1910,6 @@ inline void v_pack_store(float16_t* ptr, const v_float32x4& v)
 
 inline void v_cleanup() {}
 
-//! @name Check SIMD support
-//! @{
-//! @brief Check CPU capability of SIMD operation
-static inline bool hasSIMD128()
-{
-    return (CV_CPU_HAS_SUPPORT_NEON) ? true : false;
-}
-
-//! @}
-
 CV_CPU_OPTIMIZATION_HAL_NAMESPACE_END
 
 //! @endcond
diff --git a/modules/core/include/opencv2/core/hal/intrin_sse.hpp b/modules/core/include/opencv2/core/hal/intrin_sse.hpp
index 7b7e97c561..a01c99fa99 100644
--- a/modules/core/include/opencv2/core/hal/intrin_sse.hpp
+++ b/modules/core/include/opencv2/core/hal/intrin_sse.hpp
@@ -3043,16 +3043,6 @@ inline void v_pack_store(float16_t* ptr, const v_float32x4& v)
 
 inline void v_cleanup() {}
 
-//! @name Check SIMD support
-//! @{
-//! @brief Check CPU capability of SIMD operation
-static inline bool hasSIMD128()
-{
-    return (CV_CPU_HAS_SUPPORT_SSE2) ? true : false;
-}
-
-//! @}
-
 CV_CPU_OPTIMIZATION_HAL_NAMESPACE_END
 
 //! @endcond
diff --git a/modules/core/include/opencv2/core/hal/intrin_vsx.hpp b/modules/core/include/opencv2/core/hal/intrin_vsx.hpp
index 1a118ae270..4d98809a34 100644
--- a/modules/core/include/opencv2/core/hal/intrin_vsx.hpp
+++ b/modules/core/include/opencv2/core/hal/intrin_vsx.hpp
@@ -1355,16 +1355,6 @@ OPENCV_HAL_IMPL_VSX_TRANSPOSE4x4(v_uint32x4, vec_uint4)
 OPENCV_HAL_IMPL_VSX_TRANSPOSE4x4(v_int32x4, vec_int4)
 OPENCV_HAL_IMPL_VSX_TRANSPOSE4x4(v_float32x4, vec_float4)
 
-//! @name Check SIMD support
-//! @{
-//! @brief Check CPU capability of SIMD operation
-static inline bool hasSIMD128()
-{
-    return (CV_CPU_HAS_SUPPORT_VSX) ? true : false;
-}
-
-//! @}
-
 CV_CPU_OPTIMIZATION_HAL_NAMESPACE_END
 
 //! @endcond
diff --git a/modules/features2d/src/fast.cpp b/modules/features2d/src/fast.cpp
index 2c69bbf670..76d23cbab9 100644
--- a/modules/features2d/src/fast.cpp
+++ b/modules/features2d/src/fast.cpp
@@ -64,7 +64,6 @@ void FAST_t(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bo
 #if CV_SIMD128
     const int quarterPatternSize = patternSize/4;
     v_uint8x16 delta = v_setall_u8(0x80), t = v_setall_u8((char)threshold), K16 = v_setall_u8((char)K);
-    bool hasSimd = hasSIMD128();
 #if CV_TRY_AVX2
     Ptr<opt_AVX2::FAST_t_patternSize16_AVX2> fast_t_impl_avx2;
     if(CV_CPU_HAS_SUPPORT_AVX2)
@@ -102,7 +101,6 @@ void FAST_t(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bo
         {
             j = 3;
 #if CV_SIMD128
-            if( hasSimd )
             {
                 if( patternSize == 16 )
                 {
diff --git a/modules/features2d/src/fast_score.cpp b/modules/features2d/src/fast_score.cpp
index 9076e0b53a..73126e647b 100644
--- a/modules/features2d/src/fast_score.cpp
+++ b/modules/features2d/src/fast_score.cpp
@@ -126,7 +126,7 @@ int cornerScore<16>(const uchar* ptr, const int pixel[], int threshold)
         d[k] = (short)(v - ptr[pixel[k]]);
 
 #if CV_SIMD128
-    if (hasSIMD128())
+    if (true)
     {
         v_int16x8 q0 = v_setall_s16(-1000), q1 = v_setall_s16(1000);
         for (k = 0; k < 16; k += 8)
@@ -223,7 +223,7 @@ int cornerScore<12>(const uchar* ptr, const int pixel[], int threshold)
 #endif
 
 #if CV_SIMD128
-    if (hasSIMD128())
+    if (true)
     {
         v_int16x8 q0 = v_setall_s16(-1000), q1 = v_setall_s16(1000);
         for (k = 0; k < 16; k += 8)
@@ -304,7 +304,7 @@ int cornerScore<8>(const uchar* ptr, const int pixel[], int threshold)
         d[k] = (short)(v - ptr[pixel[k]]);
 
 #if CV_SIMD128
-    if (hasSIMD128())
+    if (true)
     {
         v_int16x8 v0 = v_load(d + 1);
         v_int16x8 v1 = v_load(d + 2);
diff --git a/modules/imgproc/src/canny.cpp b/modules/imgproc/src/canny.cpp
index 355cf37447..38fd30acc0 100644
--- a/modules/imgproc/src/canny.cpp
+++ b/modules/imgproc/src/canny.cpp
@@ -318,8 +318,7 @@ public:
         low(_low), high(_high), aperture_size(_aperture_size), L2gradient(_L2gradient)
     {
 #if CV_SIMD128
-        haveSIMD = hasSIMD128();
-        if(haveSIMD)
+        if (true)
             _map.create(src.rows + 2, (int)alignSize((size_t)(src.cols + CV_MALLOC_SIMD128 + 1), CV_MALLOC_SIMD128), CV_8UC1);
         else
 #endif
@@ -338,8 +337,7 @@ public:
         low(_low), high(_high), aperture_size(0), L2gradient(_L2gradient)
     {
 #if CV_SIMD128
-        haveSIMD = hasSIMD128();
-        if(haveSIMD)
+        if (true)
             _map.create(src.rows + 2, (int)alignSize((size_t)(src.cols + CV_MALLOC_SIMD128 + 1), CV_MALLOC_SIMD128), CV_8UC1);
         else
 #endif
@@ -440,7 +438,6 @@ public:
                 {
                     int j = 0, width = src.cols * cn;
 #if CV_SIMD128
-                    if (haveSIMD)
                     {
                        for ( ; j <= width - 8; j += 8)
                         {
@@ -464,7 +461,6 @@ public:
                 {
                     int j = 0, width = src.cols * cn;
 #if CV_SIMD128
-                    if (haveSIMD)
                     {
                         for(; j <= width - 8; j += 8)
                         {
@@ -525,7 +521,7 @@ public:
             // From here actual src row is (i - 1)
             // Set left and right border to 1
 #if CV_SIMD128
-            if(haveSIMD)
+            if (true)
                 _pmap = map.ptr<uchar>(i) + CV_MALLOC_SIMD128;
             else
 #endif
@@ -547,7 +543,6 @@ public:
             const int TG22 = 13573;
             int j = 0;
 #if CV_SIMD128
-            if (haveSIMD)
             {
                 const v_int32x4 v_low = v_setall_s32(low);
                 const v_int8x16 v_one = v_setall_s8(1);
@@ -806,9 +801,6 @@ private:
     bool L2gradient, needGradient;
     ptrdiff_t mapstep;
     int cn;
-#if CV_SIMD128
-    bool haveSIMD;
-#endif
     mutable Mutex mutex;
 };
 
@@ -820,9 +812,6 @@ public:
         map(_map), dst(_dst)
     {
         dst = _dst;
-#if CV_SIMD128
-        haveSIMD = hasSIMD128();
-#endif
     }
 
     ~finalPass() {}
@@ -836,13 +825,13 @@ public:
             uchar *pdst = dst.ptr<uchar>(i);
             const uchar *pmap = map.ptr<uchar>(i + 1);
 #if CV_SIMD128
-            if(haveSIMD)
+            if (true)
                 pmap += CV_MALLOC_SIMD128;
             else
 #endif
                 pmap += 1;
 #if CV_SIMD128
-            if(haveSIMD) {
+            {
                 const v_uint8x16 v_zero = v_setzero_u8();
                 const v_uint8x16 v_ff = ~v_zero;
                 const v_uint8x16 v_two(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2);
@@ -873,9 +862,6 @@ public:
 private:
     const Mat &map;
     Mat &dst;
-#if CV_SIMD128
-    bool haveSIMD;
-#endif
 
     finalPass(const finalPass&); // = delete
     finalPass& operator=(const finalPass&); // = delete
diff --git a/modules/imgproc/src/corner.cpp b/modules/imgproc/src/corner.cpp
index bb259ee218..65ed84af95 100644
--- a/modules/imgproc/src/corner.cpp
+++ b/modules/imgproc/src/corner.cpp
@@ -56,9 +56,6 @@ static void calcMinEigenVal( const Mat& _cov, Mat& _dst )
 #if CV_TRY_AVX
     bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
 #endif
-#if CV_SIMD128
-    bool haveSimd = hasSIMD128();
-#endif
 
     if( _cov.isContinuous() && _dst.isContinuous() )
     {
@@ -78,7 +75,6 @@ static void calcMinEigenVal( const Mat& _cov, Mat& _dst )
             j = 0;
 
 #if CV_SIMD128
-        if( haveSimd )
         {
             v_float32x4 half = v_setall_f32(0.5f);
             for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
@@ -112,9 +108,6 @@ static void calcHarris( const Mat& _cov, Mat& _dst, double k )
 #if CV_TRY_AVX
     bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
 #endif
-#if CV_SIMD128
-    bool haveSimd = hasSIMD128();
-#endif
 
     if( _cov.isContinuous() && _dst.isContinuous() )
     {
@@ -135,7 +128,6 @@ static void calcHarris( const Mat& _cov, Mat& _dst, double k )
             j = 0;
 
 #if CV_SIMD128
-        if( haveSimd )
         {
             v_float32x4 v_k = v_setall_f32((float)k);
 
@@ -254,9 +246,6 @@ cornerEigenValsVecs( const Mat& src, Mat& eigenv, int block_size,
 #if CV_TRY_AVX
     bool haveAvx = CV_CPU_HAS_SUPPORT_AVX;
 #endif
-#if CV_SIMD128
-    bool haveSimd = hasSIMD128();
-#endif
 
     int depth = src.depth();
     double scale = (double)(1 << ((aperture_size > 0 ? aperture_size : 3) - 1)) * block_size;
@@ -298,7 +287,6 @@ cornerEigenValsVecs( const Mat& src, Mat& eigenv, int block_size,
             j = 0;
 
 #if CV_SIMD128
-        if( haveSimd )
         {
             for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
             {
@@ -711,7 +699,6 @@ void cv::preCornerDetect( InputArray _src, OutputArray _dst, int ksize, int bord
     factor = 1./(factor * factor * factor);
 #if CV_SIMD128
     float factor_f = (float)factor;
-    bool haveSimd = hasSIMD128();
     v_float32x4 v_factor = v_setall_f32(factor_f), v_m2 = v_setall_f32(-2.0f);
 #endif
 
@@ -729,7 +716,6 @@ void cv::preCornerDetect( InputArray _src, OutputArray _dst, int ksize, int bord
         j = 0;
 
 #if CV_SIMD128
-        if (haveSimd)
         {
             for( ; j <= size.width - v_float32x4::nlanes; j += v_float32x4::nlanes )
             {
diff --git a/modules/imgproc/src/imgwarp.cpp b/modules/imgproc/src/imgwarp.cpp
index 0d6bb18959..e5914f748d 100644
--- a/modules/imgproc/src/imgwarp.cpp
+++ b/modules/imgproc/src/imgwarp.cpp
@@ -446,8 +446,7 @@ struct RemapVec_8u
     {
         int cn = _src.channels(), x = 0, sstep = (int)_src.step;
 
-        if( (cn != 1 && cn != 3 && cn != 4) || !hasSIMD128() ||
-            sstep > 0x8000 )
+        if( (cn != 1 && cn != 3 && cn != 4) || sstep > 0x8000 )
             return 0;
 
         const uchar *S0 = _src.ptr(), *S1 = _src.ptr(1);
@@ -1098,9 +1097,6 @@ public:
         int brows0 = std::min(128, dst->rows), map_depth = m1->depth();
         int bcols0 = std::min(buf_size/brows0, dst->cols);
         brows0 = std::min(buf_size/bcols0, dst->rows);
-#if CV_SIMD128
-        bool useSIMD = hasSIMD128();
-#endif
 
         Mat _bufxy(brows0, bcols0, CV_16SC2), _bufa;
         if( !nnfunc )
@@ -1147,7 +1143,6 @@ public:
                             x1 = 0;
 
                             #if CV_SIMD128
-                            if( useSIMD )
                             {
                                 int span = v_float32x4::nlanes;
                                 for( ; x1 <= bcols - span * 2; x1 += span * 2 )
@@ -1189,7 +1184,6 @@ public:
                         x1 = 0;
 
                         #if CV_SIMD128
-                        if (useSIMD)
                         {
                             v_uint16x8 v_scale = v_setall_u16(INTER_TAB_SIZE2 - 1);
                             int span = v_uint16x8::nlanes;
@@ -1207,7 +1201,6 @@ public:
 
                         x1 = 0;
                         #if CV_SIMD128
-                        if( useSIMD )
                         {
                             v_float32x4 v_scale = v_setall_f32((float)INTER_TAB_SIZE);
                             v_int32x4 v_scale2 = v_setall_s32(INTER_TAB_SIZE - 1);
@@ -1245,7 +1238,6 @@ public:
                         x1 = 0;
 
                         #if CV_SIMD128
-                        if( useSIMD )
                         {
                             v_float32x4 v_scale = v_setall_f32((float)INTER_TAB_SIZE);
                             v_int32x4 v_scale2 = v_setall_s32(INTER_TAB_SIZE - 1), v_scale3 = v_setall_s32(INTER_TAB_SIZE);
@@ -1898,9 +1890,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
         size.height = 1;
     }
 
-#if CV_SIMD128
-    bool useSIMD = hasSIMD128();
-#endif
 #if CV_TRY_SSE4_1
     bool useSSE4_1 = CV_CPU_HAS_SUPPORT_SSE4_1;
 #endif
@@ -1931,7 +1920,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
                 #endif
                 {
                     #if CV_SIMD128
-                    if( useSIMD )
                     {
                         int span = v_int16x8::nlanes;
                         for( ; x <= size.width - span; x += span )
@@ -1961,7 +1949,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
                 #endif
                 {
                     #if CV_SIMD128
-                    if( useSIMD )
                     {
                         v_float32x4 v_scale = v_setall_f32((float)INTER_TAB_SIZE);
                         v_int32x4 v_mask = v_setall_s32(INTER_TAB_SIZE - 1);
@@ -2002,10 +1989,11 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
             {
                 #if CV_SIMD128
                 int span = v_float32x4::nlanes;
-                if( useSIMD )
+                {
                     for( ; x <= (size.width << 1) - span * 2; x += span * 2 )
                         v_store(dst1 + x, v_pack(v_round(v_load(src1f + x)),
                                                  v_round(v_load(src1f + x + span))));
+                }
                 #endif
                 for( ; x < size.width; x++ )
                 {
@@ -2022,7 +2010,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
                 #endif
                 {
                     #if CV_SIMD128
-                    if( useSIMD )
                     {
                         v_float32x4 v_scale = v_setall_f32((float)INTER_TAB_SIZE);
                         v_int32x4 v_mask = v_setall_s32(INTER_TAB_SIZE - 1);
@@ -2063,7 +2050,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
         else if( m1type == CV_16SC2 && dstm1type == CV_32FC1 )
         {
             #if CV_SIMD128
-            if( useSIMD )
             {
                 v_uint16x8 v_mask2 =  v_setall_u16(INTER_TAB_SIZE2-1);
                 v_uint32x4 v_zero =   v_setzero_u32(), v_mask = v_setall_u32(INTER_TAB_SIZE-1);
@@ -2113,7 +2099,6 @@ void cv::convertMaps( InputArray _map1, InputArray _map2,
         else if( m1type == CV_16SC2 && dstm1type == CV_32FC2 )
         {
             #if CV_SIMD128
-            if( useSIMD )
             {
                 v_int16x8 v_mask2 = v_setall_s16(INTER_TAB_SIZE2-1);
                 v_int32x4 v_zero = v_setzero_s32(), v_mask = v_setall_s32(INTER_TAB_SIZE-1);
@@ -2189,9 +2174,6 @@ public:
     #if CV_TRY_AVX2
         bool useAVX2 = CV_CPU_HAS_SUPPORT_AVX2;
     #endif
-    #if CV_SIMD128
-        bool useSIMD = hasSIMD128();
-    #endif
     #if CV_TRY_SSE4_1
         bool useSSE4_1 = CV_CPU_HAS_SUPPORT_SSE4_1;
     #endif
@@ -2226,7 +2208,6 @@ public:
                         #endif
                         {
                             #if CV_SIMD128
-                            if( useSIMD )
                             {
                                 v_int32x4 v_X0 = v_setall_s32(X0), v_Y0 = v_setall_s32(Y0);
                                 int span = v_uint16x8::nlanes;
@@ -2260,7 +2241,6 @@ public:
                             x1 = opt_AVX2::warpAffineBlockline(adelta + x, bdelta + x, xy, alpha, X0, Y0, bw);
                         #endif
                         #if CV_SIMD128
-                        if( useSIMD )
                         {
                             v_int32x4 v__X0 = v_setall_s32(X0), v__Y0 = v_setall_s32(Y0);
                             v_int32x4 v_mask = v_setall_s32(INTER_TAB_SIZE - 1);
diff --git a/modules/imgproc/src/moments.cpp b/modules/imgproc/src/moments.cpp
index 6a0a960b19..1f1e5922cd 100644
--- a/modules/imgproc/src/moments.cpp
+++ b/modules/imgproc/src/moments.cpp
@@ -218,14 +218,13 @@ struct MomentsInTile_SIMD<uchar, int, int>
 {
     MomentsInTile_SIMD()
     {
-        useSIMD = checkHardwareSupport(CV_CPU_SSE2);
+        // nothing
     }
 
     int operator() (const uchar * ptr, int len, int & x0, int & x1, int & x2, int & x3)
     {
         int x = 0;
 
-        if( useSIMD )
         {
             __m128i dx = _mm_set1_epi16(8);
             __m128i z = _mm_setzero_si128(), qx0 = z, qx1 = z, qx2 = z, qx3 = z, qx = _mm_setr_epi16(0, 1, 2, 3, 4, 5, 6, 7);
@@ -264,7 +263,6 @@ struct MomentsInTile_SIMD<uchar, int, int>
     }
 
     int CV_DECL_ALIGNED(16) buf[4];
-    bool useSIMD;
 };
 
 #elif CV_NEON
@@ -342,14 +340,13 @@ struct MomentsInTile_SIMD<ushort, int, int64>
 {
     MomentsInTile_SIMD()
     {
-        useSIMD = checkHardwareSupport(CV_CPU_SSE4_1);
+        // nothing
     }
 
     int operator() (const ushort * ptr, int len, int & x0, int & x1, int & x2, int64 & x3)
     {
         int x = 0;
 
-        if (useSIMD)
         {
             __m128i v_delta = _mm_set1_epi32(4), v_zero = _mm_setzero_si128(), v_x0 = v_zero,
                 v_x1 = v_zero, v_x2 = v_zero, v_x3 = v_zero, v_ix0 = _mm_setr_epi32(0, 1, 2, 3);
@@ -395,7 +392,6 @@ struct MomentsInTile_SIMD<ushort, int, int64>
 
     int CV_DECL_ALIGNED(16) buf[4];
     int64 CV_DECL_ALIGNED(16) buf64[2];
-    bool useSIMD;
 };
 
 #endif
diff --git a/modules/video/src/lkpyramid.cpp b/modules/video/src/lkpyramid.cpp
index e831af9a95..3436c741a3 100644
--- a/modules/video/src/lkpyramid.cpp
+++ b/modules/video/src/lkpyramid.cpp
@@ -71,7 +71,6 @@ static void calcSharrDeriv(const cv::Mat& src, cv::Mat& dst)
 
 #if CV_SIMD128
     v_int16x8 c3 = v_setall_s16(3), c10 = v_setall_s16(10);
-    bool haveSIMD = checkHardwareSupport(CV_CPU_SSE2) || checkHardwareSupport(CV_CPU_NEON);
 #endif
 
     for( y = 0; y < rows; y++ )
@@ -84,7 +83,6 @@ static void calcSharrDeriv(const cv::Mat& src, cv::Mat& dst)
         // do vertical convolution
         x = 0;
 #if CV_SIMD128
-        if(haveSIMD)
         {
             for( ; x <= colsn - 8; x += 8 )
             {
@@ -120,7 +118,6 @@ static void calcSharrDeriv(const cv::Mat& src, cv::Mat& dst)
         // do horizontal convolution, interleave the results and store them to dst
         x = 0;
 #if CV_SIMD128
-        if(haveSIMD)
         {
             for( ; x <= colsn - 8; x += 8 )
             {