Convert the following Decryption function in C to x86 Assembly to be compiled in Nasm

unsigned short int r;

unsigned short int c1 = 52845;

unsigned short int c2 = 22719;

unsigned char Decrypt(cipher) unsigned char cipher;

{unsigned char plain;

plain = (cipher ^ (r>>8));

r = (cipher + r) * c1 + c2;

return plain; }