diff --git a/lang/cem/libcc/gen/ext_comp.c b/lang/cem/libcc/gen/ext_comp.c
index e6b1edc15..ca37b8549 100644
--- a/lang/cem/libcc/gen/ext_comp.c
+++ b/lang/cem/libcc/gen/ext_comp.c
@@ -185,17 +185,14 @@ static int
 cmp_ext(e1, e2)
 	struct EXTEND *e1, *e2;
 {
-	int sign = e1->sign ? -1 : 1;
+	struct EXTEND tmp;
 
-	if (e1->sign > e2->sign) return -1;
-	if (e1->sign < e2->sign) return 1;
-	if (e1->exp < e2->exp) return -sign;
-	if (e1->exp > e2->exp) return sign;
-	if (e1->m1 < e2->m1) return -sign;
-	if (e1->m1 > e2->m1) return sign;
-	if (e1->m2 < e2->m2) return -sign;
-	if (e1->m2 > e2->m2) return sign;
-	return 0;
+	e2->sign = ! e2->sign;
+	add_ext(e1, e2, &tmp);
+	e2->sign = ! e2->sign;
+	if (tmp.m1 == 0 && tmp.m2 == 0) return 0;
+	if (tmp->sign) return -1;
+	return 1;
 }
 
 static
diff --git a/lang/cem/libcc/gen/malloc.c b/lang/cem/libcc/gen/malloc.c
index b422a14e1..f72d08a7d 100644
--- a/lang/cem/libcc/gen/malloc.c
+++ b/lang/cem/libcc/gen/malloc.c
@@ -14,7 +14,11 @@
 #define	ptrint		long
 #endif
 
+#if EM_PSIZE == 2
+#define BRKSIZE		1024
+#else
 #define BRKSIZE		4096
+#endif
 #define	PTRSIZE		sizeof(char *)
 #define Align(x,a)	(((x) + (a - 1)) & ~(a - 1))
 #define NextSlot(p)	(* (char **) ((p) - PTRSIZE))