--- gforth/prim	2010/12/31 18:09:02	1.257
+++ gforth/prim	2011/12/19 19:43:29	1.263
@@ -1103,6 +1103,22 @@ lshift	( u1 n -- u2 )		core	l_shift
 :
     0 ?DO 2* LOOP ;
 
+umax	( u1 u2 -- u )	core
+if (u1<u2)
+  u = u2;
+else
+  u = u1;
+:
+ 2dup u< IF swap THEN drop ;
+
+umin	( u1 u2 -- u )	core
+if (u1<u2)
+  u = u1;
+else
+  u = u2;
+:
+ 2dup u> IF swap THEN drop ;
+
 \g compare
 
 \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
@@ -1804,6 +1820,8 @@ if (a_addr1==NULL)
 else
   a_addr2 = (Cell *)realloc(a_addr1, u);
 wior = IOR(a_addr2==NULL);	/* !! Define a return code */
+if (a_addr2==NULL)
+  a_addr2 = a_addr1;
 
 strerror	( n -- c_addr u )	gforth
 c_addr = (Char *)strerror(n);
@@ -2031,6 +2049,19 @@ duser = timeval2us(&time1);
 dsystem = DZERO;
 #endif
 
+ntime	( -- dtime )	gforth
+""Report the current time in nanoseconds since some epoch.""
+struct timespec time1;
+#ifdef HAVE_CLOCK_GETTIME
+clock_gettime(CLOCK_REALTIME,&time1);
+#else
+struct timeval time2;
+gettimeofday(&time2,NULL);
+time1.tv_sec = time2.tv_sec;
+time1.tv_nsec = time2.tv_usec*1000;
+#endif
+dtime = timespec2ns(&time1);
+
 \+
 
 \+floating