Difference between ARM instruction set,Thumb and Thumb-2

[chandu.kurapati]

Hi every one,
I'm working on STM controller, i read about the ARM instruction set, Thumb and Thumb-2 but they are don't understandable for me.

No examples for it please can any one explain about their significance with the example.

Thanks & Regards,
Chandu.Kurapati.

 

[jbeniston]

ARM = 32-bit instructions. Thumb = 16 bit instructions. Better performance / bigger code size in ARM mode vs Thumb.
Thumb 2 is mixed 32/16 bit instructions. Somewhere in between the two.

 

[chandu.kurapati]

Hi jbeniston,

How the ARM instruction set, thumb and thumb-2 instruction sets are look like?????

i read some notes about the instruction sets, but i cannot understand that why thumb is better than arm instruction set? what is the reason for it??

Thanks & Regards,
Chandu.Kurapati.