--- mstools/h/varargs.h	2018/08/09 18:20:01	1.1.1.1
+++ mstools/h/varargs.h	2018/08/09 18:23:08	1.1.1.3
@@ -25,6 +25,9 @@ typedef char *va_list;
 #define _VA_LIST_DEFINED
 #endif
 
+
+
+#ifdef _X86_
 /*
  * define a macro to compute the size of a type, variable or expression,
  * rounded up to the nearest multiple of sizeof(int). This number is its
@@ -36,8 +39,26 @@ typedef char *va_list;
 
 #define va_dcl va_list va_alist;
 #define va_start(ap) ap = (va_list)&va_alist
-#define va_arg(ap,t) ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
+#define va_arg(ap,t)    ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
 #define va_end(ap) ap = (va_list)0
+#endif
+
+
+#if defined(_M_MRX000)
+#define va_dcl int va_alist;
+#define va_start(list) list = (char *) &va_alist
+#define va_end(list)
+#define va_arg(list, mode) ((mode *)(list =\
+ (char *) ((((int)list + (__builtin_alignof(mode)<=4?3:7)) &\
+ (__builtin_alignof(mode)<=4?-4:-8))+sizeof(mode))))[-1]
+/*  +++++++++++++++++++++++++++++++++++++++++++
+    Because of parameter passing conventions in C:
+    use mode=int for char, and short types
+    use mode=double for float types
+    use a pointer for array types
+    +++++++++++++++++++++++++++++++++++++++++++ */
+#endif
+
 
 #ifdef __cplusplus
 }