How to compile eigen with AVX instructions
1
I have been having trouble finding documentation on how I can compile the eigen library to utilize AVX instructions? How can I best take advantage of a modern processor in eigen?
c++ eigen simd avx
asked Nov 15 '18 at 2:32
KyleKyle
912
add a comment |
1
I have been having trouble finding documentation on how I can compile the eigen library to utilize AVX instructions? How can I best take advantage of a modern processor in eigen?
c++ eigen simd avx
asked Nov 15 '18 at 2:32
KyleKyle
912
2
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile withgcc -march=native -O3 -ffast-math. I think Eigen checks#ifdef __AVX__.
– Peter Cordes
Nov 15 '18 at 2:45
1
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
4
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can docmake . -DCMAKE_CXX_FLAGS="-march native".
– ggael
Nov 15 '18 at 9:09
... or add it to the CMakeLists.txt withtarget_compile_options
– MSalters
Nov 15 '18 at 13:16
add a comment |
1
1
1
I have been having trouble finding documentation on how I can compile the eigen library to utilize AVX instructions? How can I best take advantage of a modern processor in eigen?
c++ eigen simd avx
asked Nov 15 '18 at 2:32
KyleKyle
912
I have been having trouble finding documentation on how I can compile the eigen library to utilize AVX instructions? How can I best take advantage of a modern processor in eigen?
c++ eigen simd avx
c++ eigen simd avx
asked Nov 15 '18 at 2:32
KyleKyle
912
asked Nov 15 '18 at 2:32
KyleKyle
912
asked Nov 15 '18 at 2:32
KyleKyle
912
asked Nov 15 '18 at 2:32
KyleKyle
912
asked Nov 15 '18 at 2:32
KyleKyle
912
912
2
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile withgcc -march=native -O3 -ffast-math. I think Eigen checks#ifdef __AVX__.
– Peter Cordes
Nov 15 '18 at 2:45
1
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
4
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can docmake . -DCMAKE_CXX_FLAGS="-march native".
– ggael
Nov 15 '18 at 9:09
... or add it to the CMakeLists.txt withtarget_compile_options
– MSalters
Nov 15 '18 at 13:16
add a comment |
2
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile withgcc -march=native -O3 -ffast-math. I think Eigen checks#ifdef __AVX__.
– Peter Cordes
Nov 15 '18 at 2:45
1
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
4
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can docmake . -DCMAKE_CXX_FLAGS="-march native".
– ggael
Nov 15 '18 at 9:09
... or add it to the CMakeLists.txt withtarget_compile_options
– MSalters
Nov 15 '18 at 13:16
2
2
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile with
gcc -march=native -O3 -ffast-math. I think Eigen checks #ifdef __AVX__.– Peter Cordes
Nov 15 '18 at 2:45
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile with
gcc -march=native -O3 -ffast-math. I think Eigen checks #ifdef __AVX__.– Peter Cordes
Nov 15 '18 at 2:45
1
1
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
4
4
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can do
cmake . -DCMAKE_CXX_FLAGS="-march native".– ggael
Nov 15 '18 at 9:09
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can do
cmake . -DCMAKE_CXX_FLAGS="-march native".– ggael
Nov 15 '18 at 9:09
... or add it to the CMakeLists.txt with
target_compile_options– MSalters
Nov 15 '18 at 13:16
... or add it to the CMakeLists.txt with
target_compile_options– MSalters
Nov 15 '18 at 13:16
add a comment |
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2
If you can use compile-time flags to make binaries that won't run on non-AVX CPUs, compile with
gcc -march=native -O3 -ffast-math. I think Eigen checks#ifdef __AVX__.– Peter Cordes
Nov 15 '18 at 2:45
1
What is the supported way of adding the flags? Should I edit the Makefile generated after running cmake?
– Kyle
Nov 15 '18 at 2:47
4
Eigen is header only, so there is nothing to compile/configure on Eigen's side. You have to configure your own project to enable AVX. If your project is cmake-based, then you can do
cmake . -DCMAKE_CXX_FLAGS="-march native".– ggael
Nov 15 '18 at 9:09
... or add it to the CMakeLists.txt with
target_compile_options– MSalters
Nov 15 '18 at 13:16