19990502 sourceware importbinu_ss_19990502

1 files changed, 359 insertions, 0 deletions

diff --git a/opcodes/cgen-asm.c b/opcodes/cgen-asm.c
new file mode 100644
index 00000000000..4ed69363a9d
--- /dev/null
+++ b/opcodes/cgen-asm.c
@@ -0,0 +1,359 @@
+/* CGEN generic assembler support code.
+
+   Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
+
+   This file is part of the GNU Binutils and GDB, the GNU debugger.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License along
+   with this program; if not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "sysdep.h"
+#include <stdio.h>
+#include <ctype.h>
+#include "ansidecl.h"
+#include "libiberty.h"
+#include "bfd.h"
+#include "symcat.h"
+#include "opcode/cgen.h"
+#include "opintl.h"
+
+/* Set the cgen_parse_operand_fn callback.  */
+
+void
+cgen_set_parse_operand_fn (cd, fn)
+     CGEN_CPU_DESC cd;
+     cgen_parse_operand_fn fn;
+{
+  cd->parse_operand_fn = fn;
+}
+
+/* Called whenever starting to parse an insn.  */
+
+void
+cgen_init_parse_operand (cd)
+     CGEN_CPU_DESC cd;
+{
+  /* This tells the callback to re-initialize.  */
+  (void) (* cd->parse_operand_fn)
+    (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL);
+}
+
+/* Subroutine of build_asm_hash_table to add INSNS to the hash table.
+
+   COUNT is the number of elements in INSNS.
+   ENTSIZE is sizeof (CGEN_IBASE) for the target.
+   ??? No longer used but leave in for now.
+   HTABLE points to the hash table.
+   HENTBUF is a pointer to sufficiently large buffer of hash entries.
+   The result is a pointer to the next entry to use.
+
+   The table is scanned backwards as additions are made to the front of the
+   list and we want earlier ones to be prefered.  */
+
+static CGEN_INSN_LIST *
+hash_insn_array (cd, insns, count, entsize, htable, hentbuf)
+     CGEN_CPU_DESC cd;
+     const CGEN_INSN *insns;
+     int count;
+     int entsize;
+     CGEN_INSN_LIST **htable;
+     CGEN_INSN_LIST *hentbuf;
+{
+  int i;
+
+  for (i = count - 1; i >= 0; --i, ++hentbuf)
+    {
+      unsigned int hash;
+      const CGEN_INSN *insn = &insns[i];
+
+      if (! (* cd->asm_hash_p) (insn))
+	continue;
+      hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn));
+      hentbuf->next = htable[hash];
+      hentbuf->insn = insn;
+      htable[hash] = hentbuf;
+    }
+
+  return hentbuf;
+}
+
+/* Subroutine of build_asm_hash_table to add INSNS to the hash table.
+   This function is identical to hash_insn_array except the insns are
+   in a list.  */
+
+static CGEN_INSN_LIST *
+hash_insn_list (cd, insns, htable, hentbuf)
+     CGEN_CPU_DESC cd;
+     const CGEN_INSN_LIST *insns;
+     CGEN_INSN_LIST **htable;
+     CGEN_INSN_LIST *hentbuf;
+{
+  const CGEN_INSN_LIST *ilist;
+
+  for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
+    {
+      unsigned int hash;
+
+      if (! (* cd->asm_hash_p) (ilist->insn))
+	continue;
+      hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
+      hentbuf->next = htable[hash];
+      hentbuf->insn = ilist->insn;
+      htable[hash] = hentbuf;
+    }
+
+  return hentbuf;
+}
+
+/* Build the assembler instruction hash table.  */
+
+static void
+build_asm_hash_table (cd)
+     CGEN_CPU_DESC cd;
+{
+  int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
+  CGEN_INSN_TABLE *insn_table = &cd->insn_table;
+  CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table;
+  unsigned int hash_size = cd->asm_hash_size;
+  CGEN_INSN_LIST *hash_entry_buf;
+  CGEN_INSN_LIST **asm_hash_table;
+  CGEN_INSN_LIST *asm_hash_table_entries;
+
+  /* The space allocated for the hash table consists of two parts:
+     the hash table and the hash lists.  */
+
+  asm_hash_table = (CGEN_INSN_LIST **)
+    xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
+  memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
+  asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
+    xmalloc (count * sizeof (CGEN_INSN_LIST));
+
+  /* Add compiled in insns.
+     Don't include the first one as it is a reserved entry.  */
+  /* ??? It was the end of all hash chains, and also the special
+     "invalid insn" marker.  May be able to do it differently now.  */
+
+  hash_entry_buf = hash_insn_array (cd,
+				    insn_table->init_entries + 1,
+				    insn_table->num_init_entries - 1,
+				    insn_table->entry_size,
+				    asm_hash_table, hash_entry_buf);
+
+  /* Add compiled in macro-insns.  */
+
+  hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
+				    macro_insn_table->num_init_entries,
+				    macro_insn_table->entry_size,
+				    asm_hash_table, hash_entry_buf);
+
+  /* Add runtime added insns.
+     Later added insns will be prefered over earlier ones.  */
+
+  hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
+				   asm_hash_table, hash_entry_buf);
+
+  /* Add runtime added macro-insns.  */
+
+  hash_insn_list (cd, macro_insn_table->new_entries,
+		  asm_hash_table, hash_entry_buf);
+
+  cd->asm_hash_table = asm_hash_table;
+  cd->asm_hash_table_entries = asm_hash_table_entries;
+}
+
+/* Return the first entry in the hash list for INSN.  */
+
+CGEN_INSN_LIST *
+cgen_asm_lookup_insn (cd, insn)
+     CGEN_CPU_DESC cd;
+     const char *insn;
+{
+  unsigned int hash;
+
+  if (cd->asm_hash_table == NULL)
+    build_asm_hash_table (cd);
+
+  hash = (* cd->asm_hash) (insn);
+  return cd->asm_hash_table[hash];
+}
+
+/* Keyword parser.
+   The result is NULL upon success or an error message.
+   If successful, *STRP is updated to point passed the keyword.
+
+   ??? At present we have a static notion of how to pick out a keyword.
+   Later we can allow a target to customize this if necessary [say by
+   recording something in the keyword table].  */
+
+const char *
+cgen_parse_keyword (cd, strp, keyword_table, valuep)
+     CGEN_CPU_DESC cd;
+     const char **strp;
+     CGEN_KEYWORD *keyword_table;
+     long *valuep;
+{
+  const CGEN_KEYWORD_ENTRY *ke;
+  char buf[256];
+  const char *p,*start;
+
+  p = start = *strp;
+
+  /* Allow any first character.
+     Note that this allows recognizing ",a" for the annul flag in sparc
+     even though "," is subsequently not a valid keyword char.  */
+  if (*p)
+    ++p;
+
+  /* Now allow letters, digits, and _.  */
+  while (((p - start) < (int) sizeof (buf))
+	 && (isalnum ((unsigned char) *p) || *p == '_'))
+    ++p;
+
+  if (p - start >= (int) sizeof (buf))
+    return _("unrecognized keyword/register name");
+
+  memcpy (buf, start, p - start);
+  buf[p - start] = 0;
+
+  ke = cgen_keyword_lookup_name (keyword_table, buf);
+
+  if (ke != NULL)
+    {
+      *valuep = ke->value;
+      /* Don't advance pointer if we recognized the null keyword.  */
+      if (ke->name[0] != 0)
+	*strp = p;
+      return NULL;
+    }
+
+  return "unrecognized keyword/register name";
+}
+
+/* Parse a small signed integer parser.
+   ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
+   Note that if the caller expects a bfd_vma result, it should call
+   cgen_parse_address.  */
+
+const char *
+cgen_parse_signed_integer (cd, strp, opindex, valuep)
+     CGEN_CPU_DESC cd;
+     const char **strp;
+     int opindex;
+     long *valuep;
+{
+  bfd_vma value;
+  enum cgen_parse_operand_result result;
+  const char *errmsg;
+
+  errmsg = (* cd->parse_operand_fn)
+    (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
+     &result, &value);
+  /* FIXME: Examine `result'.  */
+  if (!errmsg)
+    *valuep = value;
+  return errmsg;
+}
+
+/* Parse a small unsigned integer parser.
+   ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
+   Note that if the caller expects a bfd_vma result, it should call
+   cgen_parse_address.  */
+
+const char *
+cgen_parse_unsigned_integer (cd, strp, opindex, valuep)
+     CGEN_CPU_DESC cd;
+     const char **strp;
+     int opindex;
+     unsigned long *valuep;
+{
+  bfd_vma value;
+  enum cgen_parse_operand_result result;
+  const char *errmsg;
+
+  errmsg = (* cd->parse_operand_fn)
+    (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
+     &result, &value);
+  /* FIXME: Examine `result'.  */
+  if (!errmsg)
+    *valuep = value;
+  return errmsg;
+}
+
+/* Address parser.  */
+
+const char *
+cgen_parse_address (cd, strp, opindex, opinfo, resultp, valuep)
+     CGEN_CPU_DESC cd;
+     const char **strp;
+     int opindex;
+     int opinfo;
+     enum cgen_parse_operand_result *resultp;
+     bfd_vma *valuep;
+{
+  bfd_vma value;
+  enum cgen_parse_operand_result result_type;
+  const char *errmsg;
+
+  errmsg = (* cd->parse_operand_fn)
+    (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
+     &result_type, &value);
+  /* FIXME: Examine `result'.  */
+  if (!errmsg)
+    {
+      if (resultp != NULL)
+	*resultp = result_type;
+      *valuep = value;
+    }
+  return errmsg;
+}
+
+/* Signed integer validation routine.  */
+
+const char *
+cgen_validate_signed_integer (value, min, max)
+     long value, min, max;
+{
+  if (value < min || value > max)
+    {
+      static char buf[100];
+
+      /* xgettext:c-format */
+      sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
+		      value, min, max);
+      return buf;
+    }
+
+  return NULL;
+}
+
+/* Unsigned integer validation routine.
+   Supplying `min' here may seem unnecessary, but we also want to handle
+   cases where min != 0 (and max > LONG_MAX).  */
+
+const char *
+cgen_validate_unsigned_integer (value, min, max)
+     unsigned long value, min, max;
+{
+  if (value < min || value > max)
+    {
+      static char buf[100];
+
+      /* xgettext:c-format */
+      sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),
+	       value, min, max);
+      return buf;
+    }
+
+  return NULL;
+}