RISC-V: Add bfd/cpu-riscv.h to support all spec versions controlling.

Make the opcode/riscv-opc.c and include/opcode/riscv.h tidy, move the
spec versions stuff to bfd/cpu-riscv.h.  Also move the csr stuff and
ext_version_table to gas/config/tc-riscv.c for internal use.  To avoid
too many repeated code, define general RISCV_GET_SPEC_NAME/SPEC_CLASS
macros.  Therefore, assembler/dis-assembler/linker/gdb can get all spec
versions related stuff from cpu-riscv.h and cpu-riscv.c, since the stuff
are defined there uniformly.

bfd/
    * Makefile.am: Added cpu-riscv.h.
    * Makefile.in: Regenerated.
    * po/SRC-POTFILES.in: Regenerated.
    * cpu-riscv.h: Added to support spec versions controlling.
    Also added extern arrays and functions for cpu-riscv.c.
    (enum riscv_spec_class): Define all spec classes here uniformly.
    (struct riscv_spec): Added for all specs.
    (RISCV_GET_SPEC_CLASS): Added to reduce repeated code.
    (RISCV_GET_SPEC_NAME): Likewise.
    (RISCV_GET_ISA_SPEC_CLASS): Added to get ISA spec class.
    (RISCV_GET_PRIV_SPEC_CLASS): Added to get privileged spec class.
    (RISCV_GET_PRIV_SPEC_NAME): Added to get privileged spec name.
    * cpu-riscv.c (struct priv_spec_t): Replaced with struct riscv_spec.
    (riscv_get_priv_spec_class): Replaced with RISCV_GET_PRIV_SPEC_CLASS.
    (riscv_get_priv_spec_name): Replaced with RISCV_GET_PRIV_SPEC_NAME.
    (riscv_priv_specs): Moved below.
    (riscv_get_priv_spec_class_from_numbers): Likewise, updated.
    (riscv_isa_specs): Moved from include/opcode/riscv.h.
    * elfnn-riscv.c: Included cpu-riscv.h.
    (riscv_merge_attributes): Initialize in_priv_spec and out_priv_spec.
    * elfxx-riscv.c: Included cpu-riscv.h and opcode/riscv.h.
    (RISCV_UNKNOWN_VERSION): Moved from include/opcode/riscv.h.
    * elfxx-riscv.h: Removed extern functions to cpu-riscv.h.
gas/
    * config/tc-riscv.c: Included cpu-riscv.h.
    (enum riscv_csr_clas): Moved from include/opcode/riscv.h.
    (struct riscv_csr_extra): Likewise.
    (struct riscv_ext_version): Likewise.
    (ext_version_table): Moved from opcodes/riscv-opc.c.
    (default_isa_spec): Updated type to riscv_spec_class.
    (default_priv_spec): Likewise.
    (riscv_set_default_isa_spec): Updated.
    (init_ext_version_hash): Likewise.
    (riscv_init_csr_hash): Likewise, also fixed indent.
include/
    * opcode/riscv.h: Moved stuff and make the file tidy.
opcodes/
    * riscv-dis.c: Included cpu-riscv.h, and removed elfxx-riscv.h.
    (default_priv_spec): Updated type to riscv_spec_class.
    (parse_riscv_dis_option): Updated.
    * riscv-opc.c: Moved stuff and make the file tidy.

3 files changed, 20 insertions, 95 deletions

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index 03acd4d7..162aafcb 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,10 @@
+2021-02-18  Nelson Chu  <nelson.chu@sifive.com>
+
+	* riscv-dis.c: Included cpu-riscv.h, and removed elfxx-riscv.h.
+	(default_priv_spec): Updated type to riscv_spec_class.
+	(parse_riscv_dis_option): Updated.
+	* riscv-opc.c: Moved stuff and make the file tidy.
+
 2021-02-17  Alan Modra  <amodra@gmail.com>
 
 	* wasm32-dis.c: Include limits.h.
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index b5883c3..667dbd8 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -27,12 +27,12 @@
 #include "opintl.h"
 #include "elf-bfd.h"
 #include "elf/riscv.h"
-#include "elfxx-riscv.h"
+#include "cpu-riscv.h"
 
 #include "bfd_stdint.h"
 #include <ctype.h>
 
-static enum riscv_priv_spec_class default_priv_spec = PRIV_SPEC_CLASS_NONE;
+static enum riscv_spec_class default_priv_spec = PRIV_SPEC_CLASS_NONE;
 
 struct riscv_private_data
 {
@@ -99,17 +99,22 @@ parse_riscv_dis_option (const char *option)
   value = equal + 1;
   if (strcmp (option, "priv-spec") == 0)
     {
-      enum riscv_priv_spec_class priv_spec = PRIV_SPEC_CLASS_NONE;
-      if (!riscv_get_priv_spec_class (value, &priv_spec))
+      enum riscv_spec_class priv_spec = PRIV_SPEC_CLASS_NONE;
+      const char *name = NULL;
+
+      RISCV_GET_PRIV_SPEC_CLASS (value, priv_spec);
+      if (priv_spec == PRIV_SPEC_CLASS_NONE)
 	opcodes_error_handler (_("unknown privileged spec set by %s=%s"),
 			       option, value);
       else if (default_priv_spec == PRIV_SPEC_CLASS_NONE)
 	default_priv_spec = priv_spec;
       else if (default_priv_spec != priv_spec)
-	opcodes_error_handler (_("mis-matched privilege spec set by %s=%s, "
-				 "the elf privilege attribute is %s"),
-			       option, value,
-			       riscv_get_priv_spec_name (default_priv_spec));
+	{
+	  RISCV_GET_PRIV_SPEC_NAME (name, default_priv_spec);
+	  opcodes_error_handler (_("mis-matched privilege spec set by %s=%s, "
+				   "the elf privilege attribute is %s"),
+				 option, value, name);
+	}
     }
   else
     {
diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index b072ee2..50a3f30 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -886,90 +886,3 @@ const struct riscv_opcode riscv_insn_types[] =
 /* Terminate the list.  */
 {0, 0, INSN_CLASS_NONE, 0, 0, 0, 0, 0}
 };
-
-/* All standard extensions defined in all supported ISA spec.  */
-const struct riscv_ext_version riscv_ext_version_table[] =
-{
-/* name, ISA spec, major version, minor version.  */
-{"e", ISA_SPEC_CLASS_20191213, 1, 9},
-{"e", ISA_SPEC_CLASS_20190608, 1, 9},
-{"e", ISA_SPEC_CLASS_2P2,      1, 9},
-
-{"i", ISA_SPEC_CLASS_20191213, 2, 1},
-{"i", ISA_SPEC_CLASS_20190608, 2, 1},
-{"i", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"m", ISA_SPEC_CLASS_20191213, 2, 0},
-{"m", ISA_SPEC_CLASS_20190608, 2, 0},
-{"m", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"a", ISA_SPEC_CLASS_20191213, 2, 1},
-{"a", ISA_SPEC_CLASS_20190608, 2, 0},
-{"a", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"f", ISA_SPEC_CLASS_20191213, 2, 2},
-{"f", ISA_SPEC_CLASS_20190608, 2, 2},
-{"f", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"d", ISA_SPEC_CLASS_20191213, 2, 2},
-{"d", ISA_SPEC_CLASS_20190608, 2, 2},
-{"d", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"q", ISA_SPEC_CLASS_20191213, 2, 2},
-{"q", ISA_SPEC_CLASS_20190608, 2, 2},
-{"q", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"c", ISA_SPEC_CLASS_20191213, 2, 0},
-{"c", ISA_SPEC_CLASS_20190608, 2, 0},
-{"c", ISA_SPEC_CLASS_2P2,      2, 0},
-
-{"zicsr", ISA_SPEC_CLASS_20191213, 2, 0},
-{"zicsr", ISA_SPEC_CLASS_20190608, 2, 0},
-
-{"zifencei", ISA_SPEC_CLASS_20191213, 2, 0},
-{"zifencei", ISA_SPEC_CLASS_20190608, 2, 0},
-
-{"zihintpause", ISA_SPEC_CLASS_DRAFT, 1, 0},
-
-/* Terminate the list.  */
-{NULL, 0, 0, 0}
-};
-
-struct isa_spec_t
-{
-  const char *name;
-  enum riscv_isa_spec_class class;
-};
-
-/* List for all supported ISA spec versions.  */
-static const struct isa_spec_t isa_specs[] =
-{
-  {"2.2",      ISA_SPEC_CLASS_2P2},
-  {"20190608", ISA_SPEC_CLASS_20190608},
-  {"20191213", ISA_SPEC_CLASS_20191213},
-
-  /* Terminate the list.  */
-  {NULL, 0}
-};
-
-/* Get the corresponding ISA spec class by giving a ISA spec string.  */
-
-int
-riscv_get_isa_spec_class (const char *s,
-                         enum riscv_isa_spec_class *class)
-{
-  const struct isa_spec_t *version;
-
-  if (s == NULL)
-    return 0;
-
-  for (version = &isa_specs[0]; version->name != NULL; ++version)
-    if (strcmp (version->name, s) == 0)
-      {
-       *class = version->class;
-       return 1;
-      }
-
-  /* Can not find the supported ISA spec.  */
-  return 0;
-}