diff --git a/gas/ChangeLog b/gas/ChangeLog
index b76ae780e6a..7272221aecd 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,12 @@
+2019-06-25  Jan Beulich  <jbeulich@suse.com>
+
+	* tc-i386.c (acc32, acc64): Delete.
+	(pi): Make first parameter pinter-to-const.
+	(type_names): Remove Acc. Add acc8, acc16, acc32, and acc64.
+	(pt): Use operand_type_equal().
+	(match_template): Replace use of acc32.
+	(process_suffix): Replace use of acc64.
+
 2019-06-25  Jan Beulich  <jbeulich@suse.com>
 
 	* doc/c-i386.texi: Mark -mavxscalar= and -mvexwig as dangrous to
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 8263b15d6de..6c5d5b46c74 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -1895,8 +1895,6 @@ operand_type_xor (i386_operand_type x, i386_operand_type y)
   return x;
 }
 
-static const i386_operand_type acc32 = OPERAND_TYPE_ACC32;
-static const i386_operand_type acc64 = OPERAND_TYPE_ACC64;
 static const i386_operand_type disp16 = OPERAND_TYPE_DISP16;
 static const i386_operand_type disp32 = OPERAND_TYPE_DISP32;
 static const i386_operand_type disp32s = OPERAND_TYPE_DISP32S;
@@ -3004,7 +3002,7 @@ static void pe (expressionS *);
 static void ps (symbolS *);
 
 static void
-pi (char *line, i386_insn *x)
+pi (const char *line, i386_insn *x)
 {
   unsigned int j;
 
@@ -3105,6 +3103,10 @@ const type_names[] =
   { OPERAND_TYPE_REG16, "r16" },
   { OPERAND_TYPE_REG32, "r32" },
   { OPERAND_TYPE_REG64, "r64" },
+  { OPERAND_TYPE_ACC8, "acc8" },
+  { OPERAND_TYPE_ACC16, "acc16" },
+  { OPERAND_TYPE_ACC32, "acc32" },
+  { OPERAND_TYPE_ACC64, "acc64" },
   { OPERAND_TYPE_IMM8, "i8" },
   { OPERAND_TYPE_IMM8, "i8s" },
   { OPERAND_TYPE_IMM16, "i16" },
@@ -3127,7 +3129,6 @@ const type_names[] =
   { OPERAND_TYPE_FLOATACC, "FAcc" },
   { OPERAND_TYPE_SREG2, "SReg2" },
   { OPERAND_TYPE_SREG3, "SReg3" },
-  { OPERAND_TYPE_ACC, "Acc" },
   { OPERAND_TYPE_JUMPABSOLUTE, "Jump Absolute" },
   { OPERAND_TYPE_REGMMX, "rMMX" },
   { OPERAND_TYPE_REGXMM, "rXMM" },
@@ -3146,7 +3147,7 @@ pt (i386_operand_type t)
   for (j = 0; j < ARRAY_SIZE (type_names); j++)
     {
       a = operand_type_and (t, type_names[j].mask);
-      if (!operand_type_all_zero (&a))
+      if (operand_type_equal (&a, &type_names[j].mask))
 	fprintf (stdout, "%s, ",  type_names[j].name);
     }
   fflush (stdout);
@@ -5814,8 +5815,8 @@ match_template (char mnem_suffix)
 	     zero-extend %eax to %rax.  */
 	  if (flag_code == CODE_64BIT
 	      && t->base_opcode == 0x90
-	      && operand_type_equal (&i.types [0], &acc32)
-	      && operand_type_equal (&i.types [1], &acc32))
+	      && i.types[0].bitfield.acc && i.types[0].bitfield.dword
+	      && i.types[1].bitfield.acc && i.types[1].bitfield.dword)
 	    continue;
 	  /* xrelease mov %eax, <disp> is another special case. It must not
 	     match the accumulator-only encoding of mov.  */
@@ -6409,8 +6410,8 @@ process_suffix (void)
 	  && ! (i.operands == 2
 		&& i.tm.base_opcode == 0x90
 		&& i.tm.extension_opcode == None
-		&& operand_type_equal (&i.types [0], &acc64)
-		&& operand_type_equal (&i.types [1], &acc64)))
+		&& i.types[0].bitfield.acc && i.types[0].bitfield.qword
+		&& i.types[1].bitfield.acc && i.types[1].bitfield.qword))
 	i.rex |= REX_W;
 
       break;
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index f7890e03c1c..e669421a964 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,11 @@
+2019-06-25  Jan Beulich  <jbeulich@suse.com>
+
+	* i386-gen.c (operand_type_init): Correct OPERAND_TYPE_DEBUG
+	entry. Drop OPERAND_TYPE_ACC entry. Add OPERAND_TYPE_ACC8 and
+	OPERAND_TYPE_ACC16 entries. Adjust OPERAND_TYPE_ACC32 and
+	OPERAND_TYPE_ACC64 entries.
+	* i386-init.h: Re-generate.
+
 2019-06-25  Jan Beulich  <jbeulich@suse.com>
 
 	* i386-dis.c (Edqa, dqa_mode, EVEX_W_0F2A_P_1, EVEX_W_0F7B_P_1):
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index e80085a8357..c0325ed16b9 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -435,7 +435,7 @@ static initializer operand_type_init[] =
   { "OPERAND_TYPE_TEST",
     "Test" },
   { "OPERAND_TYPE_DEBUG",
-    "FloatReg" },
+    "Debug" },
   { "OPERAND_TYPE_FLOATREG",
     "FloatReg" },
   { "OPERAND_TYPE_FLOATACC",
@@ -444,8 +444,6 @@ static initializer operand_type_init[] =
     "SReg2" },
   { "OPERAND_TYPE_SREG3",
     "SReg3" },
-  { "OPERAND_TYPE_ACC",
-    "Acc" },
   { "OPERAND_TYPE_JUMPABSOLUTE",
     "JumpAbsolute" },
   { "OPERAND_TYPE_REGMMX",
@@ -460,10 +458,14 @@ static initializer operand_type_init[] =
     "RegMask" },
   { "OPERAND_TYPE_ESSEG",
     "EsSeg" },
+  { "OPERAND_TYPE_ACC8",
+    "Acc|Byte" },
+  { "OPERAND_TYPE_ACC16",
+    "Acc|Word" },
   { "OPERAND_TYPE_ACC32",
-    "Reg32|Acc|Dword" },
+    "Acc|Dword" },
   { "OPERAND_TYPE_ACC64",
-    "Reg64|Acc|Qword" },
+    "Acc|Qword" },
   { "OPERAND_TYPE_DISP16_32",
     "Disp16|Disp32" },
   { "OPERAND_TYPE_ANYDISP",
diff --git a/opcodes/i386-init.h b/opcodes/i386-init.h
index 1d9c17f922e..735403a34c4 100644
--- a/opcodes/i386-init.h
+++ b/opcodes/i386-init.h
@@ -1458,8 +1458,8 @@
       0, 0 } }
 
 #define OPERAND_TYPE_DEBUG \
-  { { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, \
+  { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0 } }
 
 #define OPERAND_TYPE_FLOATREG \
@@ -1482,11 +1482,6 @@
       0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0 } }
 
-#define OPERAND_TYPE_ACC \
-  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-      0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
-      0, 0 } }
-
 #define OPERAND_TYPE_JUMPABSOLUTE \
   { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
@@ -1522,13 +1517,23 @@
       0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0 } }
 
+#define OPERAND_TYPE_ACC8 \
+  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+      0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+      0, 0 } }
+
+#define OPERAND_TYPE_ACC16 \
+  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+      0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+      0, 0 } }
+
 #define OPERAND_TYPE_ACC32 \
-  { { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 0 } }
 
 #define OPERAND_TYPE_ACC64 \
-  { { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+  { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
       0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, \
       0, 0 } }