In C program,I had wroten a declaration like this: __global_reg(4) int Reg_R7; I wish r7 register be reserved,but it dose not work: r7 register still be used by compiler in orther work. How can I do? Thank a lot!
"Would you please tell me what shoud I do."
What you should have started with, was to give a very good and convincing reason why you want to steal one register from the compiler and make it into a global variable - is your program so special that this actually gains you any advantage?