[binutils-gdb] aarch64: Add +d128 architectural feature support

[Victor Do Nascimento]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=7b08cc32165912395838e7bb995d880f623fe636

commit 7b08cc32165912395838e7bb995d880f623fe636
Author: Victor Do Nascimento <victor.donascimento@arm.com>
Date:   Wed Nov 15 12:21:33 2023 +0000

    aarch64: Add +d128 architectural feature support
    
    Indicating the presence of the Armv9.4-a features concerning 128-bit
    Page Table Descriptors, 128-bit System Registers and Instructions,
    the "+d128" architectural extension flag is added to the list of
    possible -march options in Binutils, together with the necessary macro
    for encoding d128 instructions.

Diff:
---
 gas/config/tc-aarch64.c  | 2 ++
 gas/doc/c-aarch64.texi   | 2 ++
 include/opcode/aarch64.h | 3 +++
 opcodes/aarch64-tbl.h    | 5 +++++
 4 files changed, 12 insertions(+)

diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index cf586267ee8..b28c05fbd82 100644
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -10286,6 +10286,8 @@ static const struct aarch64_option_cpu_value_table aarch64_features[] = {
   {"the",		AARCH64_FEATURE (THE), AARCH64_NO_FEATURES},
   {"rasv2",		AARCH64_FEATURE (RASv2), AARCH64_FEATURE (RAS)},
   {"ite",		AARCH64_FEATURE (ITE), AARCH64_NO_FEATURES},
+  {"d128",		AARCH64_FEATURE (D128),
+			AARCH64_FEATURE (LSE128)},
   {NULL,		AARCH64_NO_FEATURES, AARCH64_NO_FEATURES},
 };
 
diff --git a/gas/doc/c-aarch64.texi b/gas/doc/c-aarch64.texi
index 97233b5c0e5..ccf18ee2661 100644
--- a/gas/doc/c-aarch64.texi
+++ b/gas/doc/c-aarch64.texi
@@ -274,6 +274,8 @@ automatically cause those extensions to be disabled.
  @tab Enable Prediction instructions.
 @item @code{ite} @tab N/A @tab no
  @tab Enable TRCIT instruction.
+@item @code{d128} @tab Armv9.4-A @tab No
+ @tab Enable the 128-bit Page Descriptor Extension.  This implies @code{lse128}.
 @end multitable
 
 @node AArch64 Syntax
diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index cc172afc879..7b7b15ae1a2 100644
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -201,6 +201,9 @@ enum aarch64_feature_bit {
   AARCH64_FEATURE_PREDRES2,
   /* Instrumentation Extension.  */
   AARCH64_FEATURE_ITE,
+  /* 128-bit page table descriptor, system registers
+     and isntructions.  */
+  AARCH64_FEATURE_D128,
   AARCH64_NUM_FEATURES
 };
 
diff --git a/opcodes/aarch64-tbl.h b/opcodes/aarch64-tbl.h
index 5058cc9c492..27550fd1c8b 100644
--- a/opcodes/aarch64-tbl.h
+++ b/opcodes/aarch64-tbl.h
@@ -2582,6 +2582,8 @@ static const aarch64_feature_set aarch64_feature_gcs =
   AARCH64_FEATURE (GCS);
 static const aarch64_feature_set aarch64_feature_ite =
   AARCH64_FEATURE (ITE);
+static const aarch64_feature_set aarch64_feature_d128 =
+  AARCH64_FEATURE (D128);
 
 #define CORE		&aarch64_feature_v8
 #define FP		&aarch64_feature_fp
@@ -2645,6 +2647,7 @@ static const aarch64_feature_set aarch64_feature_ite =
 #define CHK	  &aarch64_feature_chk
 #define GCS	  &aarch64_feature_gcs
 #define ITE	  &aarch64_feature_ite
+#define D128	  &aarch64_feature_d128
 
 #define CORE_INSN(NAME,OPCODE,MASK,CLASS,OP,OPS,QUALS,FLAGS) \
   { NAME, OPCODE, MASK, CLASS, OP, CORE, OPS, QUALS, FLAGS, 0, 0, NULL }
@@ -2798,6 +2801,8 @@ static const aarch64_feature_set aarch64_feature_ite =
   { NAME, OPCODE, MASK, ic_system, 0, CHK, OPS, QUALS, FLAGS, 0, 0, NULL }
 #define GCS_INSN(NAME, OPCODE, MASK, OPS, QUALS, FLAGS) \
   { NAME, OPCODE, MASK, gcs, 0, GCS, OPS, QUALS, FLAGS, 0, 0, NULL }
+#define D128_INSN(NAME,OPCODE,MASK,OPS,QUALS,FLAGS) \
+  { NAME, OPCODE, MASK, ic_system, 0, D128, OPS, QUALS, FLAGS, 0, 0, NULL }
 
 #define MOPS_CPY_OP1_OP2_PME_INSN(NAME, OPCODE, MASK, FLAGS, CONSTRAINTS) \
   MOPS_INSN (NAME, OPCODE, MASK, 0, \