[AArch64][Patch 4/5] Support HINT aliases taking operands.

The Statistical Profile Extension adds the instruction PSB CSYNC as an
alias for the HINT #17 instruction. This patch adds support for aliases
of HINT which take an operand, adding a table to store operand names and
their matching hint number as well as encoding and decoding functions
for such operands. Parsing and printing the operands are deferred to any
support added for aliases with such operands.

include/opcode/
2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64.h (aarch64_hint_options): Declare.
	(aarch64_opnd_info): Add field hint_option.

opcodes/
2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>

	* aarch64-asm.c (aarch64_ins_hint): New.
	* aarch64-asm.h (aarch64_ins_hint): Declare.
	* aarch64-dis.c (aarch64_ext_hint): New.
	* aarch64-dis.h (aarch64_ext_hint): Declare.
	* aarch64-opc-2.c: Regenerate.
	* aarch64-opc.c (aarch64_hint_options): New.
	* aarch64-tbl.h (AARCH64_OPERANDS): Fix typos.

Change-Id: I2205038fc1c47d3025d1f0bc2fbf405b5575b287

8 files changed, 68 insertions, 4 deletions

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index ace1392..3fdf63b 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,5 +1,15 @@
 2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
 
+	* aarch64-asm.c (aarch64_ins_hint): New.
+	* aarch64-asm.h (aarch64_ins_hint): Declare.
+	* aarch64-dis.c (aarch64_ext_hint): New.
+	* aarch64-dis.h (aarch64_ext_hint): Declare.
+	* aarch64-opc-2.c: Regenerate.
+	* aarch64-opc.c (aarch64_hint_options): New.
+	* aarch64-tbl.h (AARCH64_OPERANDS): Fix typos.
+
+2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
+
 	* aarch64-gen.c (find_alias_opcode): Set max_num_aliases to 16.
 
 2015-12-11  Matthew Wahab  <matthew.wahab@arm.com>
diff --git a/opcodes/aarch64-asm.c b/opcodes/aarch64-asm.c
index ef64501..cf4e440 100644
--- a/opcodes/aarch64-asm.c
+++ b/opcodes/aarch64-asm.c
@@ -667,6 +667,19 @@ aarch64_ins_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED,
   return NULL;
 }
 
+/* Encode the hint number for instructions that alias HINT but take an
+   operand.  */
+
+const char *
+aarch64_ins_hint (const aarch64_operand *self ATTRIBUTE_UNUSED,
+		  const aarch64_opnd_info *info, aarch64_insn *code,
+		  const aarch64_inst *inst ATTRIBUTE_UNUSED)
+{
+  /* CRm:op2.  */
+  insert_fields (code, info->hint_option->value, 0, 2, FLD_op2, FLD_CRm);
+  return NULL;
+}
+
 /* Encode the extended register operand for e.g.
      STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}].  */
 const char *
diff --git a/opcodes/aarch64-asm.h b/opcodes/aarch64-asm.h
index 386b2a3..64361eb 100644
--- a/opcodes/aarch64-asm.h
+++ b/opcodes/aarch64-asm.h
@@ -64,6 +64,7 @@ AARCH64_DECL_OPD_INSERTER (ins_sysreg);
 AARCH64_DECL_OPD_INSERTER (ins_pstatefield);
 AARCH64_DECL_OPD_INSERTER (ins_sysins_op);
 AARCH64_DECL_OPD_INSERTER (ins_barrier);
+AARCH64_DECL_OPD_INSERTER (ins_hint);
 AARCH64_DECL_OPD_INSERTER (ins_prfop);
 AARCH64_DECL_OPD_INSERTER (ins_reg_extended);
 AARCH64_DECL_OPD_INSERTER (ins_reg_shifted);
diff --git a/opcodes/aarch64-dis.c b/opcodes/aarch64-dis.c
index 631f076..6763c36 100644
--- a/opcodes/aarch64-dis.c
+++ b/opcodes/aarch64-dis.c
@@ -1067,6 +1067,33 @@ aarch64_ext_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED,
   return 1;
 }
 
+/* Decode the hint number for an alias taking an operand.  Set info->hint_option
+   to the matching name/value pair in aarch64_hint_options.  */
+
+int
+aarch64_ext_hint (const aarch64_operand *self ATTRIBUTE_UNUSED,
+		  aarch64_opnd_info *info,
+		  aarch64_insn code,
+		  const aarch64_inst *inst ATTRIBUTE_UNUSED)
+{
+  /* CRm:op2.  */
+  unsigned hint_number;
+  int i;
+
+  hint_number = extract_fields (code, 0, 2, FLD_CRm, FLD_op2);
+
+  for (i = 0; aarch64_hint_options[i].name != NULL; i++)
+    {
+      if (hint_number == aarch64_hint_options[i].value)
+	{
+	  info->hint_option = &(aarch64_hint_options[i]);
+	  return 1;
+	}
+    }
+
+  return 0;
+}
+
 /* Decode the extended register operand for e.g.
      STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}].  */
 int
diff --git a/opcodes/aarch64-dis.h b/opcodes/aarch64-dis.h
index 767191c..3704f53 100644
--- a/opcodes/aarch64-dis.h
+++ b/opcodes/aarch64-dis.h
@@ -86,6 +86,7 @@ AARCH64_DECL_OPD_EXTRACTOR (ext_sysreg);
 AARCH64_DECL_OPD_EXTRACTOR (ext_pstatefield);
 AARCH64_DECL_OPD_EXTRACTOR (ext_sysins_op);
 AARCH64_DECL_OPD_EXTRACTOR (ext_barrier);
+AARCH64_DECL_OPD_EXTRACTOR (ext_hint);
 AARCH64_DECL_OPD_EXTRACTOR (ext_prfop);
 AARCH64_DECL_OPD_EXTRACTOR (ext_reg_extended);
 AARCH64_DECL_OPD_EXTRACTOR (ext_reg_shifted);
diff --git a/opcodes/aarch64-opc-2.c b/opcodes/aarch64-opc-2.c
index 968e99c..ef7e0a4 100644
--- a/opcodes/aarch64-opc-2.c
+++ b/opcodes/aarch64-opc-2.c
@@ -107,11 +107,11 @@ const struct aarch64_operand aarch64_operands[] =
   {AARCH64_OPND_CLASS_SYSTEM, "PSTATEFIELD", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "a PSTATE field name"},
   {AARCH64_OPND_CLASS_SYSTEM, "SYSREG_AT", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "an address translation operation specifier"},
   {AARCH64_OPND_CLASS_SYSTEM, "SYSREG_DC", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "a data cache maintenance operation specifier"},
-  {AARCH64_OPND_CLASS_SYSTEM, "SYSREG_IC", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "an instructin cache maintenance operation specifier"},
+  {AARCH64_OPND_CLASS_SYSTEM, "SYSREG_IC", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "an instruction cache maintenance operation specifier"},
   {AARCH64_OPND_CLASS_SYSTEM, "SYSREG_TLBI", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "a TBL invalidation operation specifier"},
   {AARCH64_OPND_CLASS_SYSTEM, "BARRIER", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "a barrier option name"},
   {AARCH64_OPND_CLASS_SYSTEM, "BARRIER_ISB", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "the ISB option name SY or an optional 4-bit unsigned immediate"},
-  {AARCH64_OPND_CLASS_SYSTEM, "PRFOP", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "an prefetch operation specifier"},
+  {AARCH64_OPND_CLASS_SYSTEM, "PRFOP", OPD_F_HAS_INSERTER | OPD_F_HAS_EXTRACTOR, {}, "a prefetch operation specifier"},
   {AARCH64_OPND_CLASS_NIL, "", 0, {0}, "DUMMY"},
 };
 
diff --git a/opcodes/aarch64-opc.c b/opcodes/aarch64-opc.c
index a75c415..5f65f8c 100644
--- a/opcodes/aarch64-opc.c
+++ b/opcodes/aarch64-opc.c
@@ -335,6 +335,18 @@ const struct aarch64_name_value_pair aarch64_barrier_options[16] =
     { "sy",    0xf },
 };
 
+/* Table describing the operands supported by the aliases of the HINT
+   instruction.
+
+   The name column is the operand that is accepted for the alias.  The value
+   column is the hint number of the alias.  The list of operands is terminated
+   by NULL in the name column.  */
+
+const struct aarch64_name_value_pair aarch64_hint_options[] =
+{
+  { NULL, 0x0 },
+};
+
 /* op -> op:       load = 0 instruction = 1 store = 2
    l  -> level:    1-3
    t  -> temporal: temporal (retained) = 0 non-temporal (streaming) = 1   */
diff --git a/opcodes/aarch64-tbl.h b/opcodes/aarch64-tbl.h
index 91d8dcf..9e743db 100644
--- a/opcodes/aarch64-tbl.h
+++ b/opcodes/aarch64-tbl.h
@@ -2654,7 +2654,7 @@ struct aarch64_opcode aarch64_opcode_table[] =
     Y(SYSTEM, sysins_op, "SYSREG_DC", 0, F(),				\
       "a data cache maintenance operation specifier")			\
     Y(SYSTEM, sysins_op, "SYSREG_IC", 0, F(),				\
-      "an instructin cache maintenance operation specifier")		\
+      "an instruction cache maintenance operation specifier")		\
     Y(SYSTEM, sysins_op, "SYSREG_TLBI", 0, F(),				\
       "a TBL invalidation operation specifier")				\
     Y(SYSTEM, barrier, "BARRIER", 0, F(),				\
@@ -2662,4 +2662,4 @@ struct aarch64_opcode aarch64_opcode_table[] =
     Y(SYSTEM, barrier, "BARRIER_ISB", 0, F(),				\
       "the ISB option name SY or an optional 4-bit unsigned immediate")	\
     Y(SYSTEM, prfop, "PRFOP", 0, F(),					\
-      "an prefetch operation specifier")
+      "a prefetch operation specifier")