Inlining Failed AVX-512

ofmrew

I am trying to use AVX-512 but I get the inlining failed error. I am using Qt6 Creator and my processor is 11700 which supports AVX-512. I use #include <immintrin.h>, but I must be missing a compiler flag. Any suggestions or fixes? Thanks.

kshegunov

#include <x86intrin.h>

Also for gcc either -mnative or at the very least -mavx512f.

... also provide the full error texts and the relevant code, beside compiler/environment information.

ofmrew

@kshegunov said in Inlining Failed AVX-512:

-mnative

Thanks for the fast response. Anything else I can provide.
CONFIG += c++11 -mavx512f -mnative

Program

   int n = 512;
    double c[8*8];
    double b[8*8];

    __m512d sv = _mm512_set1_pd(1.0);
    for (int i = 0;i<n/8 ;i++ ) {
        __m512d cv = _mm512_loadu_pd(&c[8*i]);
        __m512d bv = _mm512_loadu_pd(&b[8*i]);
        __m512d t1 = _mm512_mul_pd(bv, sv);
                cv = _mm512_add_pd(t1, cv);
                _mm512_store_pd(&c[8*i], cv);
    }

Errors

D:\QtPrograms\TryIntrinsics2\mainwindow.cpp:17: warning: AVX512F vector return without AVX512F enabled changes the ABI [-Wpsabi]
..\TryIntrinsics2\mainwindow.cpp:17:36: warning: AVX512F vector return without AVX512F enabled changes the ABI [-Wpsabi]
     __m512d sv = _mm512_set1_pd(1.0);


                                    ^D:\Qt\Tools\mingw810_64\lib\gcc\x86_64-w64-mingw32\8.1.0\include\avx512fintrin.h:190: error: inlining failed in call to always_inline '__m512d _mm512_set1_pd(double)': target specific option mismatch
                                    
                                    In file included from D:/Qt/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/immintrin.h:45,
                                    
                                                     from ..\TryIntrinsics2\mainwindow.h:6,
                                    
                                                     from ..\TryIntrinsics2\mainwindow.cpp:1:
                                    
                                    D:/Qt/Tools/mingw810_64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/avx512fintrin.h:190:1: error: inlining failed in call to always_inline '__m512d _mm512_set1_pd(double)': target specific option mismatch
                                    
                                     _mm512_set1_pd (double __A)
                                    
                                     ^~~~~~~~~~~~~~
                                    
                                    ..\TryIntrinsics2\mainwindow.cpp:17:32: note: called from here
                                    
                                         __m512d sv = _mm512_set1_pd(1.0);
                                    
                                                      ~~~~~~~~~~~~~~^~~~~

ofmrew

I should have added that the OS is Win 11 and the compiler is MinGW 64

kshegunov

Please format your posts.

CONFIG += c++11 -mavx512f -mnative

doesn't do anything.
-mnative and -mavx512f are flags that should be passed to the compiler. They've nothing to do with the CONFIG variable of a project file. Here:
https://doc.qt.io/qt-5/qmake-variable-reference.html#qmake-cxxflags

ofmrew

I added:
QMAKE_CXXFLAGS += -mavx512f -mnative

and the compile had this error

:-1: error: error: unrecognized command line option '-mnative'

I removed -mnative and it compiled with no errors.

I have used Qt for many years and I learned something new. Thanks for the help.

Konstantin Tokarev

@ofmrew said in Inlining Failed AVX-512:

-mnative

Correct spelling of this options is -march=native