Remove more shifts for sign/zero extension

[deliverable/binutils-gdb.git] / opcodes / pdp11-dis.c

diff --git a/opcodes/pdp11-dis.c b/opcodes/pdp11-dis.c
index e9708e639eeac8abdc6475ca6fd6ebad014c12ee..a19fbc0f3d9d6ccd8b67a6ffc55cd48dd72e55c5 100644 (file)
--- a/opcodes/pdp11-dis.c
+++ b/opcodes/pdp11-dis.c
@@ -31,8 +31,7 @@
 #define F      info->stream
 
 /* Sign-extend a 16-bit number in an int.  */
-#define SIGN_BITS      (8 * sizeof (int) - 16)
-#define sign_extend(x) (((x) << SIGN_BITS) >> SIGN_BITS)
+#define sign_extend(x) ((((x) & 0xffff) ^ 0x8000) - 0x8000)
 
 static int
 read_word (bfd_vma memaddr, int *word, disassemble_info *info)