#if defined (__powerpc__)

unsigned int mach64MemReg = 0xDEADBEAF;

static inline void old_regw(volatile unsigned long regindex, unsigned long regdata)
{
  register unsigned long base_addr = (unsigned long)mach64MemReg;

  asm("stwbrx %0,%1,%2": : "r"(regdata), "r"(regindex), "r"(base_addr));
}

static inline unsigned long old_regr(volatile unsigned long regindex)
{
  register unsigned long base_addr = (unsigned long)mach64MemReg, val;

  asm("lwbrx %0,%1,%2": "=r"(val):"r"(regindex), "r"(base_addr));
  return(val);
}

static inline void regw(volatile unsigned long regindex, unsigned long regdata)
{
  register unsigned long base_addr = (unsigned long)mach64MemReg;

  asm("stwbrx %0,%1,%2": : "r"(regdata), "b"(regindex), "r"(base_addr));
}

static inline unsigned long regr(volatile unsigned long regindex)
{
  register unsigned long base_addr = (unsigned long)mach64MemReg, val;

  asm("lwbrx %0,%1,%2": "=r"(val):"b"(regindex), "r"(base_addr));
  return(val);
}
#endif

int main() {
 int offset=10;
 int data=12;
 int input, input2;
 
 input = regr(offset);
 input = old_regr(offset);

 regw(offset,data);
 old_regw(offset,data);

}