July 2008
Intermediate to advanced
544 pages
16h 52m
English
Content preview from Computers as Components, 2nd Edition
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2.3 TI C55x DSP 83
This instruction performs HI(ACy) HI(Lmem) HI(ACx) and LO(ACy)
LO(Lmem) LO(ACx). The operation is performed in 40-bit mode, but the lower
16 and upper 24 bits of the result are separated.
The MPY instruction performs an integer multiplication:
MPY src,dst
Multiplications are performed on 16-bit values. Multiplication may be performed
on accumulators,temporary registers,constants,or memory locations.The memory
locations may be addressed either directly or using the coefficient addressing mode.
A multiply and accumulate is performed by the MAC instruction. It takes the
same basic types of operands as does MPY. In the form
MAC