Getting an understandable error using __m512 intel intrinsic

Question

Hi i'm trying to use intel intrinsics. So I've made some macros that contains the intrinsics like this:

#define __M512_MM_SET_PS(dest, e15, e14, e13, e12, e11, e10, e9, e8, e7, e6, e5, e4, e3, e2, e1, e0)\
 {                                                                                                   \
dest = _mm512_set_ps(e15, e14, e13, e12, e11, e10, e9, e8, e7, e6, e5, e4, e3, e2, e1, e0);      \
 }

andtest them like so :

void test_intel_512()
{
__M512_MM_SET_PS(vec1,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0,7.0);
__M512_MM_SET_PS(vec2,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0,2.0);
__M512_MM_ADD_PS(res,vec1,vec2);
if (res[0]==9 && res[1]==9 &&res[2]==9 && res[3]==9 && res[4]==9 && res[5]==9 && res[6]==9 && res[7]==9 &&
    res[8]==9 && res[9]==9 && res[10]==9 && res[11]==9 && res[12]==9 && res[13]==9 && res[14]==9 && res[15]==9 )
    printf("Addition : OK!\n");
else
    printf("Addition : FAILED!\n");
}

Notice : I'm using gcc-4.9 with Ubuntu 12.04 and Eclipse Mars as IDE I'm also including immintrin.h and using the the flags -mavx512f. Sadly, i'm getting these errors:

make all 
gcc -g -c -Wall -O0 -mavx -mavx512f test_inst.c -lm -o test_inst.o

Assembler messages:
Error: no such instruction: `vinsertf64x4 $0x1,%ymm1,%zmm0,%zmm0'
Error: bad register name `%zmm0'
Error: no such instruction: `vinsertf64x4 $0x1,%ymm1,%zmm0,%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm0'
Error: bad register name `%zmm1'
Error: no such instruction: `kmovw %eax,%k1'
Error: bad register name `%zmm1'
Error: bad register name `%zmm0'

could someone explain to me the problem or what is wrong with this ?? Thank you

It seems that the assembler in your toolchain does not come with support for AVX512 syntax ... can you please update the question with the versions of `gcc` and `as` ? — Ferenc Deak, Aug 01 '16 at 11:29
I doubt the assembler shipped by a distro from April 2012 supports AVX512. I'm surprised the compiler and immintrin.h support `-mavx512`, unless those were backported. Anyway, the current Ubuntu LTS release is 16.04, four years newer. — Peter Cordes, Aug 01 '16 at 13:35

chqrlie · Accepted Answer · 2016-08-01T21:25:34.053

2

Your macro is defined in an error prone way. It cannot be used as a statement commanded by an if. You should use either:

#define __M512_MM_SET_PS(dest,e15,e14,e13,e12,e11,e10,e9,e8,e7,e6,e5,e4,e3,e2,e1,e0) \
        (dest) = _mm512_set_ps(e15,e14,e13,e12,e11,e10,e9,e8,e7,e6,e5,e4,e3,e2,e1,e0)

or

#define __M512_MM_SET_PS(dest,e15,e14,e13,e12,e11,e10,e9,e8,e7,e6,e5,e4,e3,e2,e1,e0) \
       do { \
           (dest) = _mm512_set_ps(e15,e14,e13,e12,e11,e10,e9,e8,e7,e6,e5,e4,e3,e2,e1,e0); \
       } while (0)

Regarding your question, the compiler configuration must be incomplete, inconsistent or outdated. Upgrade to a newer Ubuntu release.

edited Aug 01 '16 at 21:25

answered Aug 01 '16 at 14:43

chqrlie

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I hope the OP doesn't plan to declare + initialize a variable with something like `__M512_MM_SET_PS(__m512 tmp, ...)`. Really though, I don't see the point of a macro for that, especially not if you're going to give it a name even longer than Intel's intrinsic name. – Peter Cordes Aug 01 '16 at 15:48
@PeterCordes : Putting the intrinsics in macros has a purpose in my project otherwise i will not even take the trouble of making these macros. – A.nechi Aug 02 '16 at 08:49
@chqrlie : I'm not sure about upgrading Ubuntu because I'm using a simulator called gem5 that could be incompatible with newer versions of Ubuntu. – A.nechi Aug 02 '16 at 08:52
@A.nechi: [Intel's SDE](https://software.intel.com/en-us/articles/intel-software-development-emulator) works on the latest Ubuntu. You could also just install a newer compiler, like clang-3.8 ([repos for Ubuntu, including 12.04 Precise](http://apt.llvm.org/). There's probably a gcc & binutils backport repo as well. Using compilers / assemblers that only just added support for an instruction set is not likely to be a good test, since later versions probably make better code. – Peter Cordes Aug 02 '16 at 14:07

Getting an understandable error using __m512 intel intrinsic

1 Answers1