How to rotate array in mkl

[caden_g_]

int arrA[]={1,2,3,..........100};

I want to get arrB={100,.......3,2,1};

What's the fastest fun?

[caden_g_]

If I want to get arrA={100,.......3,2,1},too;

What's the fastest fun?

[Gennady_F_Intel]

MKL doesn't have such functions, but you may have a look at the existing IPP functionality ( ippsFlip_*,* or ippsSortAscend/Descend ). 

https://software.intel.com/en-us/node/502149.

[TimP]

C++ reverse_copy() is optimized for the designated architecture by Intel C++ and g++.  A plain loop would work as well.

[mecej4]

By the way, note that "Rotate" is not an apt word for what you want to do. "Reverse", "Reflect" or the more flippant "Flip" would be more appropriate.

[caden_g_]

Gennady Fedorov (Intel) wrote:

MKL doesn't have such functions, but you may have a look at the existing IPP functionality ( ippsFlip_*,* or ippsSortAscend/Descend ). 

https://software.intel.com/en-us/node/502149.

ok,thank you

[caden_g_]

Tim P. wrote:

C++ reverse_copy() is optimized for the designated architecture by Intel C++ and g++.  A plain loop would work as well.

ok thank you

[caden_g_]

mecej4 wrote:

By the way, note that "Rotate" is not an apt word for what you want to do. "Reverse", "Reflect" or the more flippant "Flip" would be more appropriate.

yes, you are right.