Fix varargs/stdarg on PowerPC Windows NT

From-SVN: r12637

gcc/ginclude/stdarg.h

@@ -38,7 +38,7 @@
 #if defined (__H8300__) || defined (__H8300H__) || defined (__H8300S__)
 #include <va-h8300.h>
 #else
-#if defined (__PPC__) && defined (_CALL_SYSV)
+#if defined (__PPC__) && (defined (_CALL_SYSV) || defined (__WIN32__))
 #include <va-ppc.h>
 #else
 #ifdef __sh__

gcc/ginclude/va-ppc.h

@@ -1,5 +1,7 @@
-/* GNU C varargs support for the PowerPC with V.4 calling sequence */
+/* GNU C varargs support for the PowerPC with either the V.4 or Windows NT calling sequences */
 
+#ifndef __WIN32__
+/* System V.4 support */
 /* Define __gnuc_va_list.  */
 
 #ifndef __GNUC_VA_LIST
@@ -167,3 +169,56 @@ __extension__ (*({							\
 #define va_end(AP)	((void)0)
 
 #endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
+
+
+#else
+/* Windows NT */
+/* Define __gnuc_va_list.  */
+
+#ifndef __GNUC_VA_LIST
+#define __GNUC_VA_LIST
+typedef char *__gnuc_va_list;
+#endif /* not __GNUC_VA_LIST */
+
+/* If this is for internal libc use, don't define anything but
+   __gnuc_va_list.  */
+#if defined (_STDARG_H) || defined (_VARARGS_H)
+
+#define __va_start_common(AP, LASTARG, FAKE)				\
+  ((__builtin_saveregs ()), ((AP) = ((char *) &LASTARG) + __va_rounded_size (AP)), 0)
+
+#ifdef _STDARG_H /* stdarg.h support */
+
+/* Calling __builtin_next_arg gives the proper error message if LASTARG is
+   not indeed the last argument.  */
+#define va_start(AP,LASTARG)						\
+  (__builtin_saveregs (),						\
+   (AP) = __builtin_next_arg (LASTARG),					\
+   0)
+
+#else /* varargs.h support */
+
+#define va_start(AP)							\
+  (__builtin_saveregs (),						\
+   (AP) = __builtin_next_arg (__va_1st_arg) - sizeof (int),		\
+   0)
+
+#define va_alist __va_1st_arg
+#define va_dcl register int __va_1st_arg; ...
+
+#endif /* _STDARG_H */
+
+#define __va_rounded_size(TYPE) ((sizeof (TYPE) + 3) & ~3)
+#define __va_align(AP, TYPE)						\
+     ((((unsigned long)(AP)) + ((sizeof (TYPE) >= 8) ? 7 : 3))		\
+      & ~((sizeof (TYPE) >= 8) ? 7 : 3))
+
+#define va_arg(AP,TYPE)							\
+( *(TYPE *)((AP = (char *) (__va_align(AP, TYPE)			\
+			    + __va_rounded_size(TYPE)))			\
+	    - __va_rounded_size(TYPE)))
+
+#define va_end(AP)	((void)0)
+
+#endif /* defined (_STDARG_H) || defined (_VARARGS_H) */
+#endif /* Windows NT */

gcc/ginclude/varargs.h

@@ -36,7 +36,7 @@
 #if defined (__H8300__) || defined (__H8300H__) || defined (__H8300S__)
 #include <va-h8300.h>
 #else
-#if defined (__PPC__) && defined (_CALL_SYSV)
+#if defined (__PPC__) && (defined (_CALL_SYSV) || defined (__WIN32__))
 #include <va-ppc.h>
 #else
 #ifdef __sh__