Overview: Intrinsics for Short Vector Math Library (SVML) Functions

The Intel® C++ Compiler provides short vector math library (SVML) intrinsics to compute vector math functions. These intrinsics are available for IA-32 and Intel® 64 architectures running on supported operating systems.

The SVML intrinsics are vector variants of corresponding scalar math operations using __m128, __m128d, __m256, __m256d, and __m256i data types. They take packed vector arguments, perform the operation on each element of the packed vector argument, and return a packed vector result.

For example, the argument to the _mm_sin_ps intrinsic is a packed 128-bit vector of four 32-bit precision floating point numbers. The intrinsic computes the sine of each of these four numbers and returns the four results in a packed 128-bit vector.

Using SVML intrinsics is faster than repeatedly calling the scalar math functions. However, the intrinsics differ from the scalar functions in accuracy.

The SVML intrinsics do not have any corresponding instructions. The prototypes for the SVML intrinsics are available in the immintrin.h file.

Note

Many routines in the svml library are more highly optimized for Intel® microprocessors than for non-Intel microprocessors.

For more complete information about compiler optimizations, see our Optimization Notice.