core(mathfuncs_core): cpu optimization dispatched code

modules/core/CMakeLists.txt

 set(the_description "The Core Functionality")
+
+ocv_add_dispatched_file(mathfuncs_core SSE2 AVX AVX2)
+
 ocv_add_module(core
                "${OPENCV_HAL_LINKER_LIBS}"
                OPTIONAL opencv_cudev

modules/core/src/mathfuncs_core.dispatch.cpp

+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#include "precomp.hpp"
+
+#include "mathfuncs_core.simd.hpp"
+#include "mathfuncs_core.simd_declarations.hpp" // defines CV_CPU_DISPATCH_MODES_ALL=AVX2,...,BASELINE based on CMakeLists.txt content
+
+namespace cv { namespace hal {
+
+///////////////////////////////////// ATAN2 ////////////////////////////////////
+
+void fastAtan32f(const float *Y, const float *X, float *angle, int len, bool angleInDegrees )
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(fastAtan32f, cv_hal_fastAtan32f, Y, X, angle, len, angleInDegrees);
+
+    CV_CPU_DISPATCH(fastAtan32f, (Y, X, angle, len, angleInDegrees),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void fastAtan64f(const double *Y, const double *X, double *angle, int len, bool angleInDegrees)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(fastAtan64f, cv_hal_fastAtan64f, Y, X, angle, len, angleInDegrees);
+
+    CV_CPU_DISPATCH(fastAtan64f, (Y, X, angle, len, angleInDegrees),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+// deprecated
+void fastAtan2(const float *Y, const float *X, float *angle, int len, bool angleInDegrees )
+{
+    CV_INSTRUMENT_REGION()
+
+    fastAtan32f(Y, X, angle, len, angleInDegrees);
+}
+
+void magnitude32f(const float* x, const float* y, float* mag, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(magnitude32f, cv_hal_magnitude32f, x, y, mag, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsMagnitude_32f, x, y, mag, len) >= 0);
+
+    CV_CPU_DISPATCH(magnitude32f, (x, y, mag, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void magnitude64f(const double* x, const double* y, double* mag, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(magnitude64f, cv_hal_magnitude64f, x, y, mag, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsMagnitude_64f, x, y, mag, len) >= 0);
+
+    CV_CPU_DISPATCH(magnitude64f, (x, y, mag, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+
+void invSqrt32f(const float* src, float* dst, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(invSqrt32f, cv_hal_invSqrt32f, src, dst, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsInvSqrt_32f_A21, src, dst, len) >= 0);
+
+    CV_CPU_DISPATCH(invSqrt32f, (src, dst, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+
+void invSqrt64f(const double* src, double* dst, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(invSqrt64f, cv_hal_invSqrt64f, src, dst, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsInvSqrt_64f_A50, src, dst, len) >= 0);
+
+    CV_CPU_DISPATCH(invSqrt64f, (src, dst, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+
+void sqrt32f(const float* src, float* dst, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(sqrt32f, cv_hal_sqrt32f, src, dst, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsSqrt_32f_A21, src, dst, len) >= 0);
+
+    CV_CPU_DISPATCH(sqrt32f, (src, dst, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+
+void sqrt64f(const double* src, double* dst, int len)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(sqrt64f, cv_hal_sqrt64f, src, dst, len);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsSqrt_64f_A50, src, dst, len) >= 0);
+
+    CV_CPU_DISPATCH(sqrt64f, (src, dst, len),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void exp32f(const float *src, float *dst, int n)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(exp32f, cv_hal_exp32f, src, dst, n);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsExp_32f_A21, src, dst, n) >= 0);
+
+    CV_CPU_DISPATCH(exp32f, (src, dst, n),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void exp64f(const double *src, double *dst, int n)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(exp64f, cv_hal_exp64f, src, dst, n);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsExp_64f_A50, src, dst, n) >= 0);
+
+    CV_CPU_DISPATCH(exp64f, (src, dst, n),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void log32f(const float *src, float *dst, int n)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(log32f, cv_hal_log32f, src, dst, n);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsLn_32f_A21, src, dst, n) >= 0);
+
+    CV_CPU_DISPATCH(log32f, (src, dst, n),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+void log64f(const double *src, double *dst, int n)
+{
+    CV_INSTRUMENT_REGION()
+
+    CALL_HAL(log64f, cv_hal_log64f, src, dst, n);
+    CV_IPP_RUN_FAST(CV_INSTRUMENT_FUN_IPP(ippsLn_64f_A50, src, dst, n) >= 0);
+
+    CV_CPU_DISPATCH(log64f, (src, dst, n),
+        CV_CPU_DISPATCH_MODES_ALL);
+}
+
+//=============================================================================
+// for compatibility with 3.0
+
+void exp(const float* src, float* dst, int n)
+{
+    exp32f(src, dst, n);
+}
+
+void exp(const double* src, double* dst, int n)
+{
+    exp64f(src, dst, n);
+}
+
+void log(const float* src, float* dst, int n)
+{
+    log32f(src, dst, n);
+}
+
+void log(const double* src, double* dst, int n)
+{
+    log64f(src, dst, n);
+}
+
+void magnitude(const float* x, const float* y, float* dst, int n)
+{
+    magnitude32f(x, y, dst, n);
+}
+
+void magnitude(const double* x, const double* y, double* dst, int n)
+{
+    magnitude64f(x, y, dst, n);
+}
+
+void sqrt(const float* src, float* dst, int len)
+{
+    sqrt32f(src, dst, len);
+}
+
+void sqrt(const double* src, double* dst, int len)
+{
+    sqrt64f(src, dst, len);
+}
+
+void invSqrt(const float* src, float* dst, int len)
+{
+    invSqrt32f(src, dst, len);
+}
+
+void invSqrt(const double* src, double* dst, int len)
+{
+    invSqrt64f(src, dst, len);
+}
+
+}} // namespace cv::hal::
+
+float cv::fastAtan2( float y, float x )
+{
+    using namespace cv::hal;
+    CV_CPU_CALL_BASELINE(fastAtan2, (y, x));
+}