u8 fpregs_in_use; // FP regs in use x3A-x3A
u8 pmcregs_in_use; // PMC regs in use x3B-x3B
volatile u32 saved_decr; // Saved Decr Value x3C-x3F
u8 fpregs_in_use; // FP regs in use x3A-x3A
u8 pmcregs_in_use; // PMC regs in use x3B-x3B
volatile u32 saved_decr; // Saved Decr Value x3C-x3F