Multiplier
Multiplier
Multiply Unit
P Register (32)
ACC (32)
Shift (PM)
32x32 Multiply Unit
16x16
Data Mem
or Register
Prog Mem (16)
or
Immed (8,16)
XT Register
MUX
T Register
Digital signal processors require many multiply and add math intensive operations. The single
cycle multiplier is the second major component in the execution unit. The C28x has the
traditional 16-bit-by-16-bit multiplier as previous TI DSP families. In-addition, the C28x has a
single cycle 32-bit-by-32-bit multiplier to perform extended precision math operations. The large
multiplier allows the C28x to support higher performance control systems requirement while
maintaining small or reduce code.
The following slides introduce instructions that use the 16-bit-by-16-bit multiplier and multiply
and add (MAC) operations. The 32-bit-by-32-bit multiplication will be covered in the appendix.
C28x - Appendix C - Assembly Programming C - 9
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