X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=opcodes%2Fpdp11-dis.c;h=02d46a9760d1741d2f1bf8215f5336e5e899e587;hb=50d036364fb2a71b3ac9a0b0cdbe58296832a1b2;hp=1d9eaa5a511c337e366eaf30214341209d882128;hpb=219d1afa89d0d53ca93a684cac341f16470f3ca0;p=deliverable%2Fbinutils-gdb.git

diff --git a/opcodes/pdp11-dis.c b/opcodes/pdp11-dis.c
index 1d9eaa5a51..02d46a9760 100644
--- a/opcodes/pdp11-dis.c
+++ b/opcodes/pdp11-dis.c
@@ -1,5 +1,5 @@
 /* Print DEC PDP-11 instructions.
-   Copyright (C) 2001-2018 Free Software Foundation, Inc.
+   Copyright (C) 2001-2020 Free Software Foundation, Inc.
 
    This file is part of the GNU opcodes library.
 
@@ -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)