topic Bear in mind that inline in Software Tuning, Performance Optimization & Platform Monitoring

Preformance between Intel Assembly vs Intel Intrinsics

Uday_Krishna__G_ — Wed, 12 Feb 2014 12:47:57 GMT

Deal All,

Am trying to optimize my codec application on Intel Platform. before kick start Is the any numbers for the performance comparison numbers between Intel Assembly vs Intel Intrinsics? Am in delima to choose between the two approaches.

If the specific intrinsic is

Bernard — Wed, 12 Feb 2014 14:21:18 GMT

If the specific intrinsic is directly compiled into single machine code instruction you will probably not see any difference in the performance when comparing inline assembly vs. compiler intrinsic.

The compiler has more

TimP — Wed, 12 Feb 2014 14:27:51 GMT

The compiler has more latitude to optimize intrinsics. For example, Intel C++ will choose more effective equivalent instructions, or switch from SSE to AVX-128, when permitted according to the architecture flag.

Bear in mind that inline

Bernard — Wed, 12 Feb 2014 15:19:48 GMT

Bear in mind that inline assembly code will not be optimized by the compiler at least this is the case with VS C++ compiler.