// Special g++ Options: -fno-strict-aliasing
// Origin: Mark Mitchell <mark@codesourcery.com>
+/* Generally, the lowest bit of the ptr is used to indicate whether a
+ ptr-to-mem-func points to a virtual or a non-virtual member
+ function. However, some platforms use all bits to encode a
+ function pointer. Such platforms use the lowest bit of the delta,
+ that is shifted left by one bit. */
+#if defined __MN10300__ || defined __arm__ || defined __thumb__
+#define ADJUST_PTRFN(func, virt) ((void (*)())(func))
+#define ADJUST_DELTA(delta, virt) (((delta) << 1) + !!(virt))
+#else
+#define ADJUST_PTRFN(func, virt) ((void (*)())((ptrdiff_t)(func) + !!(virt)))
+#define ADJUST_DELTA(delta, virt) (delta)
+#endif
+
#if defined (__GXX_ABI_VERSION) && __GXX_ABI_VERSION >= 100
// Check that pointers-to-member functions are represented correctly.
// There should be no adjustment for the `T' version, and an
// appropriate adjustment for the `S' version.
y = &T::f;
- if (yp->ptr != &_ZN1T1fEv)
+ if (yp->ptr != ADJUST_PTRFN (&_ZN1T1fEv, 0))
return 5;
- if (yp->adj != 0)
+ if (yp->adj != ADJUST_DELTA (0, 0))
return 6;
x = (sp) y;
- if (xp->ptr != &_ZN1T1fEv)
+ if (xp->ptr != ADJUST_PTRFN (&_ZN1T1fEv, 0))
return 7;
- if (xp->adj != delta)
+ if (xp->adj != ADJUST_DELTA (delta, 0))
return 8;
// For a virtual function, we should see the vtable offset, plus
// one. `T::h' is in the second slot: the vtable pointer points to
// the first virtual function.
y = &T::h;
- if ((ptrdiff_t) yp->ptr != sizeof (void *) + 1)
+ if (yp->ptr != ADJUST_PTRFN (sizeof (void *), 1))
return 9;
- if (yp->adj != 0)
+ if (yp->adj != ADJUST_DELTA (0, 1))
return 10;
x = (sp) y;
- if ((ptrdiff_t) xp->ptr != sizeof (void *) + 1)
+ if (xp->ptr != ADJUST_PTRFN (sizeof (void *), 1))
return 11;
- if (xp->adj != delta)
+ if (xp->adj != ADJUST_DELTA (delta, 1))
return 12;
// Pointers-to-data-members should have the same size and alignment