X86: Properly handle bad FPU opcode

Since Bad_Opcode and FGRPd9_2 were the same in i386-dis.c, all
Bad_Opcode entries in float_reg were displaced as FGRPd9_2.  This
patch adds an entry for Bad_Opcode in fgrps to avoid treating it
as FGRPd9_2.

gas/

	PR binutils/20775
	* testsuite/gas/i386/i386.exp: Run fpu-bad.
	* testsuite/gas/i386/fpu-bad.d: New file.
	* testsuite/gas/i386/fpu-bad.s: Likewise.

opcodes/

	PR binutils/20775
	* i386-dis.c (FGRPd9_2): Replace 0 with 1.
	(FGRPd9_4): Replace 1 with 2.
	(FGRPd9_5): Replace 2 with 3.
	(FGRPd9_6): Replace 3 with 4.
	(FGRPd9_7): Replace 4 with 5.
	(FGRPda_5): Replace 5 with 6.
	(FGRPdb_4): Replace 6 with 7.
	(FGRPde_3): Replace 7 with 8.
	(FGRPdf_4): Replace 8 with 9.
	(fgrps): Add an entry for Bad_Opcode.

6 files changed, 60 insertions, 18 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 6cdfc69..e8481a3 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,10 @@
+2016-11-07  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/20775
+	* testsuite/gas/i386/i386.exp: Run fpu-bad.
+	* testsuite/gas/i386/fpu-bad.d: New file.
+	* testsuite/gas/i386/fpu-bad.s: Likewise.
+
 2016-11-04  Nathan Sidwell  <nathan@acm.org>
 
 	gas/
diff --git a/gas/testsuite/gas/i386/fpu-bad.d b/gas/testsuite/gas/i386/fpu-bad.d
new file mode 100644
index 0000000..ea1fe24
--- /dev/null
+++ b/gas/testsuite/gas/i386/fpu-bad.d
@@ -0,0 +1,11 @@
+#as: --32
+#objdump: -dw
+#name: i386 fpu bad opcodes
+
+.*: +file format .*
+
+Disassembly of section .text:
+
+0+ <start>:
+ +[a-f0-9]+:	dd f0                	\(bad\)  
+#pass
diff --git a/gas/testsuite/gas/i386/fpu-bad.s b/gas/testsuite/gas/i386/fpu-bad.s
new file mode 100644
index 0000000..a038170
--- /dev/null
+++ b/gas/testsuite/gas/i386/fpu-bad.s
@@ -0,0 +1,4 @@
+	.text
+start:
+	.byte 0xdd
+	.byte 0xf0
diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index 11c342a..1b28fa1 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -378,6 +378,7 @@ if [expr ([istarget "i*86-*-*"] ||  [istarget "x86_64-*-*"]) && [gas_32_check]]
     run_dump_test "ptwrite-intel"
     run_list_test "avx512vl-1" "-al"
     run_list_test "avx512vl-2" "-al"
+    run_dump_test "fpu-bad"
 
     # These tests require support for 8 and 16 bit relocs,
     # so we only run them for ELF and COFF targets.
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index b58ad90..438e770 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,17 @@
+2016-11-07  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR binutils/20775
+	* i386-dis.c (FGRPd9_2): Replace 0 with 1.
+	(FGRPd9_4): Replace 1 with 2.
+	(FGRPd9_5): Replace 2 with 3.
+	(FGRPd9_6): Replace 3 with 4.
+	(FGRPd9_7): Replace 4 with 5.
+	(FGRPda_5): Replace 5 with 6.
+	(FGRPdb_4): Replace 6 with 7.
+	(FGRPde_3): Replace 7 with 8.
+	(FGRPdf_4): Replace 8 with 9.
+	(fgrps): Add an entry for Bad_Opcode.
+
 2016-11-04  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* arc-opc.c (arc_flag_operands): Add F_DI14.
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index 22f77aa..ec4a697 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -13830,15 +13830,15 @@ static const unsigned char float_mem_mode[] = {
 #define ST { OP_ST, 0 }
 #define STi { OP_STi, 0 }
 
-#define FGRPd9_2 NULL, { { NULL, 0 } }, 0
-#define FGRPd9_4 NULL, { { NULL, 1 } }, 0
-#define FGRPd9_5 NULL, { { NULL, 2 } }, 0
-#define FGRPd9_6 NULL, { { NULL, 3 } }, 0
-#define FGRPd9_7 NULL, { { NULL, 4 } }, 0
-#define FGRPda_5 NULL, { { NULL, 5 } }, 0
-#define FGRPdb_4 NULL, { { NULL, 6 } }, 0
-#define FGRPde_3 NULL, { { NULL, 7 } }, 0
-#define FGRPdf_4 NULL, { { NULL, 8 } }, 0
+#define FGRPd9_2 NULL, { { NULL, 1 } }, 0
+#define FGRPd9_4 NULL, { { NULL, 2 } }, 0
+#define FGRPd9_5 NULL, { { NULL, 3 } }, 0
+#define FGRPd9_6 NULL, { { NULL, 4 } }, 0
+#define FGRPd9_7 NULL, { { NULL, 5 } }, 0
+#define FGRPda_5 NULL, { { NULL, 6 } }, 0
+#define FGRPdb_4 NULL, { { NULL, 7 } }, 0
+#define FGRPde_3 NULL, { { NULL, 8 } }, 0
+#define FGRPdf_4 NULL, { { NULL, 9 } }, 0
 
 static const struct dis386 float_reg[][8] = {
   /* d8 */
@@ -13932,48 +13932,53 @@ static const struct dis386 float_reg[][8] = {
 };
 
 static char *fgrps[][8] = {
-  /* d9_2  0 */
+  /* Bad opcode 0 */
+  {
+    "(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
+  },
+
+  /* d9_2  1 */
   {
     "fnop","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
   },
 
-  /* d9_4  1 */
+  /* d9_4  2 */
   {
     "fchs","fabs","(bad)","(bad)","ftst","fxam","(bad)","(bad)",
   },
 
-  /* d9_5  2 */
+  /* d9_5  3 */
   {
     "fld1","fldl2t","fldl2e","fldpi","fldlg2","fldln2","fldz","(bad)",
   },
 
-  /* d9_6  3 */
+  /* d9_6  4 */
   {
     "f2xm1","fyl2x","fptan","fpatan","fxtract","fprem1","fdecstp","fincstp",
   },
 
-  /* d9_7  4 */
+  /* d9_7  5 */
   {
     "fprem","fyl2xp1","fsqrt","fsincos","frndint","fscale","fsin","fcos",
   },
 
-  /* da_5  5 */
+  /* da_5  6 */
   {
     "(bad)","fucompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
   },
 
-  /* db_4  6 */
+  /* db_4  7 */
   {
     "fNeni(8087 only)","fNdisi(8087 only)","fNclex","fNinit",
     "fNsetpm(287 only)","frstpm(287 only)","(bad)","(bad)",
   },
 
-  /* de_3  7 */
+  /* de_3  8 */
   {
     "(bad)","fcompp","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
   },
 
-  /* df_4  8 */
+  /* df_4  9 */
   {
     "fNstsw","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)","(bad)",
   },