Intel® 64 and IA-32 Architectures Optimization Reference Manual

INTEL® 64 AND IA-32 PROCESSOR ARCHITECTURESSSE2 instructions are useful for 3D graphics, video decoding/encoding, and encryption.2.8.1.4 Streaming SIMD Extensions 3Streaming SIMD extensions 3 add the following:• SIMD floating-point instructions for asymmetric and horizontal computation• a special-purpose 128-bit load instruction to avoid cache line splits• an x87 FPU instruction to convert to integer independent of the floating-pointcontrol word (FCW)• instructions to support thread synchronizationSSE3 instructions are useful for scientific, video and multi-threaded applications.2.8.1.5 Supplemental Streaming SIMD Extensions 3The Supplemental Streaming SIMD Extensions 3 introduces 32 new instructions toaccelerate eight types of computations on packed integers. These include:• 12 instructions that perform horizontal addition or subtraction operations• 6 instructions that evaluate the absolute values• 2 instructions that perform multiply and add operations and speed up theevaluation of dot products• 2 instructions that accelerate packed-integer multiply operations and produceinteger values with scaling• 2 instructions that perform a byte-wise, in-place shuffle according to the secondshuffle control operand• 6 instructions that negate packed integers in the destination operand if the signsof the corresponding element in the source operand is less than zero• 2 instructions that align data from the composite of two operands2-49