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cv::sqrt

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This commit is contained in:
Ilya Lavrenov 2014-04-04 12:20:18 +04:00
parent c224cfa628
commit 49d1691a3e
1 changed files with 21 additions and 0 deletions
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21
modules/core/src/mathfuncs.cpp
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@ -2175,6 +2175,27 @@ void pow( InputArray _src, double power, OutputArray _dst )
}
else if( fabs(fabs(power) - 0.5) < DBL_EPSILON )
{
#ifdef HAVE_IPP
if (power > 0 && (src.dims <= 2 || (src.isContinuous() && dst.isContinuous()))) // power is 0.5
{
Size size = src.size();
int srcstep = (int)src.step, dststep = (int)dst.step, esz = src.elemSize();
if (src.isContinuous() && dst.isContinuous())
{
srcstep = dststep = (int)src.total() * esz;
size.width = (int)src.total();
size.height = 1;
}
size.width *= cn;
IppStatus status = ippiSqrt_32f_C1R((const Ipp32f *)src.data, srcstep, (Ipp32f *)dst.data, dststep,
ippiSize(size.width, size.height));
if (status == ippStsNoErr)
return;
}
#endif
MathFunc func = power < 0 ?
(depth == CV_32F ? (MathFunc)InvSqrt_32f : (MathFunc)InvSqrt_64f) :
(depth == CV_32F ? (MathFunc)Sqrt_32f : (MathFunc)Sqrt_64f);