_REG_O0
gr[_REG_O0] = (ulong)arg;
uc.uc_mcontext.__gregs[_REG_O0] = (val != 0 ? val : 1);
gr[_REG_O0 + i] = va_arg(ap, unsigned long);
gr[_REG_O0] = (ulong) arg;
uc.uc_mcontext.__gregs[_REG_O0] = val;
gr[_REG_O0 + i] = sp[i + 16] = va_arg(ap, unsigned long);
#define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_O0])
r[_REG_O0] = tf->tf_out[0];
tf->tf_out[0] = r[_REG_O0];
gr[_REG_O0] = tf->tf_out[0];
tf->tf_out[0] = (uint64_t)gr[_REG_O0];
gr[_REG_O0] = tf->tf_out[0];
tf->tf_out[0] = (uint64_t)gr[_REG_O0];