Define EXTEND15().

sim/common/ChangeLog

@@ -2,7 +2,8 @@ Tue Apr 14 18:49:31 1998  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* sim-bits.h (EXTEND4): Define.
 	(EXTEND4): Ditto.
-
+	(EXTEND15): Ditto.
+	
 Tue Apr 14 16:31:35 1998  John Metzler  <jmetzler@cygnus.com>
 
 	* sim-memopt.c (parse_addr): Sunos 4.5 does not hane strtol

sim/common/sim-bits.h

@@ -461,6 +461,7 @@ INLINE_SIM_BITS(unsigned_word) MSINSERTED (unsigned_word val, int start, int sto
 #define EXTEND4(X)  (LSSEXT ((X), 3))
 #define EXTEND5(X)  (LSSEXT ((X), 4))
 #define EXTEND8(X)  ((signed_word)(signed8)(X))
+#define EXTEND15(X)  (LSSEXT ((X), 14))
 #define EXTEND16(X) ((signed_word)(signed16)(X))
 #define EXTEND32(X) ((signed_word)(signed32)(X))
 #define EXTEND64(X) ((signed_word)(signed64)(X))