From bfb45b27e6d5f3b11b4e579fb8d77b3bef7ff1cf Mon Sep 17 00:00:00 2001
From: Ilya Lavrenov <ilya.lavrenov@itseez.com>
Date: Mon, 12 Jan 2015 10:59:29 +0300
Subject: [PATCH] column sum 32s

---
 modules/imgproc/src/smooth.cpp | 152 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)

diff --git a/modules/imgproc/src/smooth.cpp b/modules/imgproc/src/smooth.cpp
index 5ab70d9..b7c3004 100644
--- a/modules/imgproc/src/smooth.cpp
+++ b/modules/imgproc/src/smooth.cpp
@@ -714,6 +714,158 @@ struct ColumnSum<int, ushort> :
 };
 
 template<>
+struct ColumnSum<int, int> :
+        public BaseColumnFilter
+{
+    ColumnSum( int _ksize, int _anchor, double _scale ) :
+        BaseColumnFilter()
+    {
+        ksize = _ksize;
+        anchor = _anchor;
+        scale = _scale;
+        sumCount = 0;
+    }
+
+    virtual void reset() { sumCount = 0; }
+
+    virtual void operator()(const uchar** src, uchar* dst, int dststep, int count, int width)
+    {
+        int i;
+        int* SUM;
+        bool haveScale = scale != 1;
+        double _scale = scale;
+
+        printf("bgfbffbbfg\n");
+
+        #if CV_SSE2
+            bool haveSSE2 = checkHardwareSupport(CV_CPU_SSE2);
+        #endif
+
+        if( width != (int)sum.size() )
+        {
+            sum.resize(width);
+            sumCount = 0;
+        }
+        SUM = &sum[0];
+        if( sumCount == 0 )
+        {
+            memset((void*)SUM, 0, width*sizeof(int));
+            for( ; sumCount < ksize - 1; sumCount++, src++ )
+            {
+                const int* Sp = (const int*)src[0];
+                i = 0;
+                #if CV_SSE2
+                if(haveSSE2)
+                {
+                    for( ; i <= width-4; i+=4 )
+                    {
+                        __m128i _sum = _mm_loadu_si128((const __m128i*)(SUM+i));
+                        __m128i _sp = _mm_loadu_si128((const __m128i*)(Sp+i));
+                        _mm_storeu_si128((__m128i*)(SUM+i),_mm_add_epi32(_sum, _sp));
+                    }
+                }
+                #elif CV_NEON
+                for( ; i <= width - 4; i+=4 )
+                    vst1q_s32(SUM + i, vaddq_s32(vld1q_s32(SUM + i), vld1q_s32(Sp + i)));
+                #endif
+                for( ; i < width; i++ )
+                    SUM[i] += Sp[i];
+            }
+        }
+        else
+        {
+            CV_Assert( sumCount == ksize-1 );
+            src += ksize-1;
+        }
+
+        for( ; count--; src++ )
+        {
+            const int* Sp = (const int*)src[0];
+            const int* Sm = (const int*)src[1-ksize];
+            int* D = (int*)dst;
+            if( haveScale )
+            {
+                i = 0;
+                #if CV_SSE2
+                if(haveSSE2)
+                {
+                    const __m128 scale4 = _mm_set1_ps((float)_scale);
+                    for( ; i <= width-4; i+=4 )
+                    {
+                        __m128i _sm   = _mm_loadu_si128((const __m128i*)(Sm+i));
+
+                        __m128i _s0  = _mm_add_epi32(_mm_loadu_si128((const __m128i*)(SUM+i)),
+                                                     _mm_loadu_si128((const __m128i*)(Sp+i)));
+
+                        __m128i _s0T  = _mm_cvtps_epi32(_mm_mul_ps(scale4, _mm_cvtepi32_ps(_s0)));
+
+                        _mm_storeu_si128((__m128i*)(D+i), _s0T);
+                        _mm_storeu_si128((__m128i*)(SUM+i),_mm_sub_epi32(_s0,_sm));
+                    }
+                }
+                #elif CV_NEON
+                float32x4_t v_scale = vdupq_n_f32((float)_scale);
+                for( ; i <= width-4; i+=4 )
+                {
+                    int32x4_t v_s0 = vaddq_s32(vld1q_s32(SUM + i), vld1q_s32(Sp + i));
+
+                    int32x4_t v_s0d = cv_vrndq_s32_f32(vmulq_f32(vcvtq_f32_s32(v_s0), v_scale));
+                    vst1q_s32(D + i, v_s0d);
+
+                    vst1q_s32(SUM + i, vsubq_s32(v_s0, vld1q_s32(Sm + i)));
+                }
+                #endif
+                for( ; i < width; i++ )
+                {
+                    int s0 = SUM[i] + Sp[i];
+                    D[i] = saturate_cast<int>(s0*_scale);
+                    SUM[i] = s0 - Sm[i];
+                }
+            }
+            else
+            {
+                i = 0;
+                #if CV_SSE2
+                if(haveSSE2)
+                {
+                    for( ; i <= width-4; i+=4 )
+                    {
+                        __m128i _sm  = _mm_loadu_si128((const __m128i*)(Sm+i));
+                        __m128i _s0  = _mm_add_epi32(_mm_loadu_si128((const __m128i*)(SUM+i)),
+                                                     _mm_loadu_si128((const __m128i*)(Sp+i)));
+
+                        _mm_storeu_si128((__m128i*)(D+i), _s0);
+                        _mm_storeu_si128((__m128i*)(SUM+i), _mm_sub_epi32(_s0,_sm));
+                    }
+                }
+                #elif CV_NEON
+                for( ; i <= width-4; i+=4 )
+                {
+                    int32x4_t v_s0 = vaddq_s32(vld1q_s32(SUM + i), vld1q_s32(Sp + i));
+
+                    vst1q_s32(D + i, v_s01);
+                    vst1q_s32(SUM + i, vsubq_s32(v_s0, vld1q_s32(Sm + i)));
+                }
+                #endif
+
+                for( ; i < width; i++ )
+                {
+                    int s0 = SUM[i] + Sp[i];
+                    D[i] = s0;
+                    SUM[i] = s0 - Sm[i];
+                }
+            }
+            dst += dststep;
+        }
+    }
+
+    double scale;
+    int sumCount;
+    std::vector<int> sum;
+};
+
+
+template<>
 struct ColumnSum<int, float> :
         public BaseColumnFilter
 {
-- 
2.7.4