Developer Guide and Reference

Contents

Data Alignment

Memory operations using the Intel® Streaming SIMD Extensions should be performed on 16-byte-aligned data whenever possible. Memory operations using the Intel® Advanced Vector Extensions should be performed on 32-byte-aligned data whenever possible.
F32vec4
and
F64vec2
object variables are properly aligned by default. Note that floating point arrays are not automatically aligned. To get 16-byte alignment, you can use the alignment
__declspec
:
__declspec( align(16) ) float A[4];

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804