SSE3,
Streaming SIMD Extensions 3, also known by its
Intel code name
Prescott New Instructions (PNI), is the third iteration of the
SSE instruction set for the
IA-32 (x86) architecture. Intel introduced SSE3 in early 2004 with the Prescott revision of their
Pentium 4 CPU. In April 2005,
AMD introduced a subset of SSE3 in revision E (Venice and San Diego) of their
Athlon 64 CPUs. The earlier
SIMD instruction sets on the
x86 platform, from oldest to newest, are
MMX,
3DNow! (developed by AMD),
SSE and
SSE2.