SW_R16 91 arch/nios2/include/asm/entry.h stw r16, SW_R16(sp) SW_R16 105 arch/nios2/include/asm/entry.h ldw r16, SW_R16(sp) SW_R16 54 arch/nios2/kernel/asm-offsets.c OFFSET(SW_R16, switch_stack, r16);