OMAP 3530 multipliers

Jose Tijerina

Other Parts Discussed in Thread: OMAP3530

I'm working with the OMAP3530's C64x DSP and I'm investigating its multiply capabilities. From the data sheet, I see the following:

· Two Multipliers Support Four 16 x 16-Bit Multiplies (32-Bit Results) per ClockCycle or Eight 8 x 8-Bit Multiplies (16-Bit Results) per Clock Cycle

Is this performance achieved only by using the multiply instrinsics or does this not matter?

What performance do I get if I do 32x32-bit multiplies? Do I get one of those multiplies per cycle? And will my result be a 64-bit or 40-bit result?

Is the C64x considered a 16-bit or 32-bit processor?

over 14 years ago

0 HRi over 14 years ago

Guru 10750 points

Joe Joe,

The C64x+ is a 32 bit machine, as you have 8 functional units you can have 8 commands in parallel per cycle (depends on the command), you can have 2 32x32 multiplication every cycle and the result can be 32/64bit, please review spru732 - TMS320C64xC64x+ DSP CPU and Instruction Set Reference Guide, you can find an explanation for the various commands,

BR,

0 Jose Tijerina over 14 years ago in reply to HRi

Intellectual 380 points

Thanks for the reference, I'll check out this doc.

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OMAP 3530 multipliers