currently im implementing ECDSA key verifying algorithm on a mcf51qm128 coldfire controller. Unfortunately my first implementation using pure c language and parts of the GMP Library makes it very slow, so I have to improve my algorithm.
Therefore I found the application not an3038 which handles multiplying using EMAC unit.I would need some support how I implement this assembly function in my c project (codewarrior development studio 10.2).
I create the mp_mul64.c and mult_add64.s File. But when im trying compile it I get the following error:
Instructions must occur within code section "mul_add64.s"
Is there anything I have to observe when using assembly code in c project or maybe there already exists any implemantion for verifying an ecdsa signature on coldfire platform ?
Thanks for help