commonly found in networking and telecommunications applications. Several compa -nies manufacture blades that conform to ATCA, an industry-standard platform speci -fication, including this and other similar stand-alone Freescale processors. Section 3.3
examines these platforms.
The MPC7448 has enjoyed popularity in a wide variety of signal-processing and
networking applications because of its advanced feature set:
• Operating clock rates in excess of 1.5GHz
• 1MB onboard L2 cache
• Advanced power-management capabilities, including multiple sleep modes
• Advanced AltiVec vector-execution unit
• Vo l t a g e s c a l i n g f o r r e d u c e d - p o w e r c o n f i g u r a t i o n s
The MPC7448 contains a Freescale technology called AltiVec to enable very fast
algorithmic computations and other data-crunching applications. The AltiVec unit
consists of a register file containing 32 very wide (128-bit) registers. Each value within
one of these AltiVec registers can be considered a vector of multiple elements. AltiVec
defines a set of instructions to manipulate this vector data effectively in parallel with
core CPU instruction processing. AltiVec operations include such computations as
sum-across, multiply-sum, simultaneous data distribute (store), and data gather (load)
instructions.
Programmers have used the AltiVec hardware to enable very fast software computa-tions commonly found in signal-processing and network elements. Examples include
fast Fourier Transform, digital signal processing such as filtering, MPEG video encod -ing and decoding, and fast generation of encryption protocols such as DES, MD5, and
SHA1.
Other chips in the Freescale lineup of stand-alone processors include the MPC7410,
MPC7445, MPC7447, MPC745x, and MPC7xx family.
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