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ximgproc: optimize guidedfilter function for ARM64 using NEON intrinsics #3979

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ximgproc: optimize guidedfilter function for ARM64 using NEON intrinsics #3979

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27 changes: 27 additions & 0 deletions modules/ximgproc/src/edgeaware_filters_common.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,19 @@ inline bool CPU_SUPPORT_SSE1()
} // end
#endif

#if CV_NEON
namespace
{

inline bool CPU_SUPPORT_NEON()
{
static const bool is_supported = cv::checkHardwareSupport(CV_CPU_NEON);
return is_supported;
}

} // end
#endif

namespace cv
{
namespace ximgproc
Expand Down Expand Up @@ -288,6 +301,20 @@ void add_mul(float *dst, float *src1, float *src2, int w)
_mm_storeu_ps(dst + j, c);
}
}
#elif CV_NEON
if (CPU_SUPPORT_NEON())
{
float32x4_t a, b, c;
for (; j < w - 3; j += 4)
{
a = vld1q_f32(src1 + j);
b = vld1q_f32(src2 + j);
b = vmulq_f32(b, a);
c = vld1q_f32(dst + j);
c = vaddq_f32(c, b);
vst1q_f32(dst + j, c);
}
}
#endif
for (; j < w; j++)
{
Expand Down