[PATCH] x86: drop stray VEX opcode 82 references

[Jan Beulich]

No such ModR/M-less opcode has ever existed in public documentation
afaict, so I can't see why it had been added in the first place.
Furthermore opcode 77 is special only with implied prefix 0F.

opcodes/
2017-02-21  Jan Beulich  <jbeulich@suse.com>

	* i386-dis.c (get_valid_dis386): Don't special case VEX opcode
	82. For 3-byte VEX only special case opcode 77 in VEX_0F space.

--- 2017-02-21/opcodes/i386-dis.c
+++ 2017-02-21/opcodes/i386-dis.c
@@ -12771,8 +12771,8 @@ get_valid_dis386 (const struct dis386 *d
       vindex = *codep++;
       dp = &vex_table[vex_table_index][vindex];
       end_codep = codep;
-      /* There is no MODRM byte for VEX [82|77].  */
-      if (vindex != 0x77 && vindex != 0x82)
+      /* There is no MODRM byte for VEX0F 77.  */
+      if (vex_table_index != VEX_0F || vindex != 0x77)
 	{
 	  FETCH_DATA (info, codep + 1);
 	  modrm.mod = (*codep >> 6) & 3;
@@ -12814,8 +12814,8 @@ get_valid_dis386 (const struct dis386 *d
       vindex = *codep++;
       dp = &vex_table[dp->op[1].bytemode][vindex];
       end_codep = codep;
-      /* There is no MODRM byte for VEX [82|77].  */
-      if (vindex != 0x77 && vindex != 0x82)
+      /* There is no MODRM byte for VEX 77.  */
+      if (vindex != 0x77)
 	{
 	  FETCH_DATA (info, codep + 1);
 	  modrm.mod = (*codep >> 6) & 3;