ARM Cortex-M3 DSP

[dknguyen]

DOes anyone know if the ARM Cortex-M3 has a barrel shifter or MAC? I don't seen it anywhere but I seem to be under the impression that it has them.

 

[Ubergeek63]

DOes anyone know if the ARM Cortex-M3 has a barrel shifter or MAC? I don't seen it anywhere but I seem to be under the impression that it has them.

All ARM cores have a limited barrel shifter accessed with the multiply instructions. I forget which argument is the 8 bitter, but it takes one or two cycles + 1 for each 8 bits of the 8 bitter while the other can be as large as you want in all ARMs with more extensive multiply instructions available depending on the core version.

http://www.electro-tech-online.com/custompdfs/2009/02/QRC0001_UAL.pdf
ARM Information Center

Dan