Vodafone SS 08 - Manual (Page 13)

TU Dresden, 4/29/2008 Slide 13
chair
Hardware vs. Microcode multiplication
ƒ DSP processors are optimized to perform
multiplication and addition operations.
ƒ Multiplication and addition are done in
hardware and in one cycle.
ƒ Example: 4-bit multiply (unsigned).
1011 1011
x 1110 x 1110
1011 1011
x 1110 x 1110
Hardware Hardware Microcode Microcode
10011010 10011010 0000 0000
1011. 1011.
1011.. 1011..
1011... 1011...
10011010 10011010
Cycle 1 Cycle 1
Cycle 2 Cycle 2
Cycle 3 Cycle 3
Cycle 4 Cycle 4
Cycle 5 Cycle 5