topic Quote:Frances Roth (Intel) in Software Archive

error:"Opcode unsupported on target architecture: movaps"

Vincent_L_ — Mon, 14 Jul 2014 04:48:55 GMT

Hi, I am a new developer for mic. Rencent I met a problem confused me a lot.

the code like that:

__declspec (aligned(128)) float farray[] = {0.0, 2.0, 4.0, 6.0, 8.0, 10.0, 12.0, 14.0};
F32vec16 vecConst;
vecConst = *(F32vec16*)&farray[0];

first I compile in native mode like:

icpc -mmic -openmp......

it work well and run well in mic.

but when I want to use a offload mode (the code is in a #pragma offload region) and I compile with:

icpc -openmp ......

it report compile error: "error #13393: *MIC* Opcode unsupported on target architecture: movaps" in the line "vecConst = *(SIMDType*)&farray[0];"

I can not figure it out why?

Thanks.

That problem sounded familiar

Frances_R_Intel — Tue, 15 Jul 2014 01:16:18 GMT

That problem sounded familiar so I search in the User and Reference Guide for the Intel® C++ Compiler and found in the section "Use of C++ Classes for SIMD Operations on Intel® Many Integrated Core Architecture (Intel® MIC Architecture)":

"You can enable these classes within native code or within offloaded code that is written to contain target-specific code typically protected by the __MIC__ macro."

You might want to do something like what it says in the section "Writing Target-Specific Code Using a Pragma" in the User and Reference Guide.

You can find the software documentation at: https://software.intel.com/en-us/intel-software-technical-documentation. The section "Writing Target-Specific Code Using a Pragma", in the 14.0 version of the manual is at https://software.intel.com/en-us/node/512551

Quote:Frances Roth (Intel)

Vincent_L_ — Wed, 16 Jul 2014 00:12:53 GMT

Frances Roth (Intel) wrote:

That problem sounded familiar so I search in the User and Reference Guide for the Intel® C++ Compiler and found in the section "Use of C++ Classes for SIMD Operations on Intel® Many Integrated Core Architecture (Intel® MIC Architecture)":

"You can enable these classes within native code or within offloaded code that is written to contain target-specific code typically protected by the __MIC__ macro."

You might want to do something like what it says in the section "Writing Target-Specific Code Using a Pragma" in the User and Reference Guide.

You can find the software documentation at: https://software.intel.com/en-us/intel-software-technical-documentation. The section "Writing Target-Specific Code Using a Pragma", in the 14.0 version of the manual is at https://software.intel.com/en-us/node/512551

Thanks! You reply is very helpful! I rewrite the code in the AVX immintrin form and add comment "ifdef __MIC__" and it work well.In offload mode it need the annotation "__MIC__" to tell the compiler that the code will be run on the mic.