/* unlike Keil CARM Compiler, in ARM's RealView compiler, don't save and
restore registers into the stack in RVD as the compiler does that for you.
See RVD ARM compiler Inline and embedded assemblers, "Rules for
using __asm and asm keywords. */
static DWORD sysreg; /* used as LR register */
#define IENABLE __asm { MRS sysreg, SPSR; MSR CPSR_c, #SYS32Mode }
#define IDISABLE __asm { MSR CPSR_c, #(IRQ32Mode|I_Bit); MSR SPSR_cxsf, sysreg }