On Tue, May 14, 2013 at 8:34 PM, Richard Smith <[email protected]> wrote: > On Tue, May 14, 2013 at 4:07 PM, Charles Davis <[email protected]> wrote: >> >> >> On May 14, 2013, at 4:26 PM, Aaron Ballman wrote: >> > >> >> Do __sptr and __uptr get different manglings? >> > >> > They do: >> > >> > void func( int * __ptr32 p ) {} >> > void func2( int * __ptr64 p ) {} >> > >> > PUBLIC ?func@@YAXPAH@Z ; func >> > PUBLIC ?func2@@YAXPEAH@Z ; func2 >> > >> > Namely, the presence of E (rnk pointed this out previously). >> He was asking about __sptr and __uptr :). They don't by the way: >> >> > cl /c test.cpp >> [extraneous banner output omitted] >> > dumpbin /symbols test.obj >> [...] >> 00F 00000010 SECT4 notype () External | ?func@@YAXPAH@Z (void >> __cdecl func(int *)) >> 010 00000020 SECT4 notype () External | ?func2@@YAXPAH@Z (void >> __cdecl func2(int *)) > > > Thanks. One more thing: > > template<typename T> void f(void **p, T *q) { *p = *q; } > > void *g(int *__ptr32 __sptr a) { > void *result; > f(&result, &a); > return result; > } > void *h(char *__ptr32 __uptr a) { > void *result; > f(&result, &a); > return result; > } > > int main() { > printf("%p\n", g((int *__ptr32 __sptr)0xdeadbeef)); > printf("%p\n", h((char *__ptr32 __uptr)0xdeadbeef)); > } > > Does one of these get sign-extended and the other one get zero-extended?
The first is sign extended, and the second is zero extended in 64-bit. ~Aaron _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
