* Makefile.am: Add cgen support.

	* Makefile.in: Regenerate.
	* configure.in: Add cgen support.
	* configure: Regenerate.
	* aclocal.m4: Regenerate.
	* cgen.sh, cgen-asm.in, cgen-dis.in: New files.

1 files changed, 394 insertions, 0 deletions

diff --git a/opcodes/cgen-asm.in b/opcodes/cgen-asm.in
new file mode 100644
index 0000000..8a5099b
--- /dev/null
+++ b/opcodes/cgen-asm.in
@@ -0,0 +1,394 @@
+/* Assembler interface for targets using CGEN. -*- C -*-
+   CGEN: Cpu tools GENerator
+
+This file is used to generate @arch@-asm.c.
+
+Copyright (C) 1996, 1997 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 <ctype.h>
+#include <stdio.h>
+#include "ansidecl.h"
+#include "bfd.h"
+#include "@arch@-opc.h"
+
+/* ??? The layout of this stuff is still work in progress.
+   For speed in assembly/disassembly, we use inline functions.  That of course
+   will only work for GCC.  When this stuff is finished, we can decide whether
+   to keep the inline functions (and only get the performance increase when
+   compiled with GCC), or switch to macros, or use something else.
+*/
+
+static const char *parse_insn_normal
+     PARAMS ((const CGEN_INSN *, const char **, CGEN_FIELDS *));
+static void insert_insn_normal
+     PARAMS ((const CGEN_INSN *, CGEN_FIELDS *, cgen_insn_t *));
+
+/* Default insertion routine.
+
+   SHIFT is negative for left shifts, positive for right shifts.
+   All bits of VALUE to be inserted must be valid as we don't handle
+   signed vs unsigned shifts.
+
+   ATTRS is a mask of the boolean attributes.  We don't need any at the
+   moment, but for consistency with extract_normal we have them.  */
+
+/* FIXME: This duplicates functionality with bfd's howto table and
+   bfd_install_relocation.  */
+/* FIXME: For architectures where insns can be representable as ints,
+   store insn in `field' struct and add registers, etc. while parsing.  */
+
+static CGEN_INLINE void
+insert_normal (value, attrs, start, length, shift, total_length, buffer)
+     long value;
+     unsigned int attrs;
+     int start, length, shift, total_length;
+     char *buffer;
+{
+  bfd_vma x;
+
+#if 0 /*def CGEN_INT_INSN*/
+  *buffer |= ((value & ((1 << length) - 1))
+	      << (total_length - (start + length)));
+#else
+  switch (total_length)
+    {
+    case 8:
+      x = *(unsigned char *) buffer;
+      break;
+    case 16:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	x = bfd_getb16 (buffer);
+      else
+	x = bfd_getl16 (buffer);
+      break;
+    case 32:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	x = bfd_getb32 (buffer);
+      else
+	x = bfd_getl32 (buffer);
+      break;
+    default :
+      abort ();
+    }
+
+  if (shift < 0)
+    value <<= -shift;
+  else
+    value >>= shift;
+
+  x |= ((value & ((1 << length) - 1))
+	<< (total_length - (start + length)));
+
+  switch (total_length)
+    {
+    case 8:
+      *buffer = value;
+      break;
+    case 16:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	bfd_putb16 (x, buffer);
+      else
+	bfd_putl16 (x, buffer);
+      break;
+    case 32:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	bfd_putb32 (x, buffer);
+      else
+	bfd_putl32 (x, buffer);
+      break;
+    default :
+      abort ();
+    }
+#endif
+}
+
+/* -- assembler routines inserted here */
+
+/* Default insn parser.
+
+   The syntax string is scanned and operands are parsed and stored in FIELDS.
+   Relocs are queued as we go via other callbacks.
+
+   ??? Note that this is currently an all-or-nothing parser.  If we fail to
+   parse the instruction, we return 0 and the caller will start over from
+   the beginning.  Backtracking will be necessary in parsing subexpressions,
+   but that can be handled there.  Not handling backtracking here may get
+   expensive in the case of the m68k.  Deal with later.
+
+   Returns NULL for success, an error message for failure.
+*/
+
+static const char *
+parse_insn_normal (insn, strp, fields)
+     const CGEN_INSN *insn;
+     const char **strp;
+     CGEN_FIELDS *fields;
+{
+  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+  const char *str = *strp;
+  const char *errmsg;
+  const char *p;
+  const unsigned char *syn;
+#ifdef CGEN_MNEMONIC_OPERANDS
+  int past_opcode_p;
+#endif
+
+  /* For now we assume the mnemonic is first (there are no leading operands).
+     We can parse it without needing to set up operand parsing.  */
+  p = CGEN_INSN_MNEMONIC (insn);
+  while (*p && *p == *str)
+    ++p, ++str;
+  if (*p || (*str && !isspace (*str)))
+    return "unrecognized instruction";
+
+  CGEN_INIT_PARSE ();
+  cgen_init_parse_operand ();
+#ifdef CGEN_MNEMONIC_OPERANDS
+  past_opcode_p = 0;
+#endif
+
+  /* We don't check for (*str != '\0') here because we want to parse
+     any trailing fake arguments in the syntax string.  */
+  syn = CGEN_SYNTAX_STRING (CGEN_INSN_SYNTAX (insn));
+  /* Mnemonics come first for now, ensure valid string.  */
+  if (! CGEN_SYNTAX_MNEMONIC_P (*syn))
+    abort ();
+  ++syn;
+  while (*syn != 0)
+    {
+      /* Non operand chars must match exactly.  */
+      /* FIXME: Need to better handle whitespace.  */
+      if (CGEN_SYNTAX_CHAR_P (*syn))
+	{
+	  if (*str == CGEN_SYNTAX_CHAR (*syn))
+	    {
+#ifdef CGEN_MNEMONIC_OPERANDS
+	      if (*syn == ' ')
+		past_opcode_p = 1;
+#endif
+	      ++syn;
+	      ++str;
+	    }
+	  else
+	    {
+	      /* Syntax char didn't match.  Can't be this insn.  */
+	      /* FIXME: would like to return "expected char `c'" */
+	      return "syntax error";
+	    }
+	  continue;
+	}
+
+      /* We have an operand of some sort.  */
+      errmsg = @arch@_cgen_parse_operand (CGEN_SYNTAX_FIELD (*syn),
+					 &str, fields);
+      if (errmsg)
+	return errmsg;
+
+      /* Done with this operand, continue with next one.  */
+      ++syn;
+    }
+
+  /* If we're at the end of the syntax string, we're done.  */
+  if (*syn == '\0')
+    {
+      /* FIXME: For the moment we assume a valid `str' can only contain
+	 blanks now.  IE: We needn't try again with a longer version of
+	 the insn and it is assumed that longer versions of insns appear
+	 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
+      while (isspace (*str))
+	++str;
+
+      if (*str != '\0')
+	return "junk at end of line"; /* FIXME: would like to include `str' */
+
+      return NULL;
+    }
+
+  /* We couldn't parse it.  */
+  return "unrecognized instruction";
+}
+
+/* Default insn builder (insert handler).
+   The instruction is recorded in target byte order.  */
+
+static void
+insert_insn_normal (insn, fields, buffer)
+     const CGEN_INSN *insn;
+     CGEN_FIELDS *fields;
+     cgen_insn_t *buffer;
+{
+  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+  bfd_vma value;
+  const unsigned char *syn;
+
+  CGEN_INIT_INSERT ();
+  value = CGEN_INSN_VALUE (insn);
+
+  /* If we're recording insns as numbers (rather than a string of bytes),
+     target byte order handling is deferred until later.  */
+#undef min
+#define min(a,b) ((a) < (b) ? (a) : (b))
+#if 0 /*def CGEN_INT_INSN*/
+  *buffer = value;
+#else
+  switch (min (CGEN_BASE_INSN_BITSIZE, CGEN_FIELDS_BITSIZE (fields)))
+    {
+    case 8:
+      *buffer = value;
+      break;
+    case 16:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	bfd_putb16 (value, (char *) buffer);
+      else
+	bfd_putl16 (value, (char *) buffer);
+      break;
+    case 32:
+      if (CGEN_CURRENT_ENDIAN == CGEN_ENDIAN_BIG)
+	bfd_putb32 (value, (char *) buffer);
+      else
+	bfd_putl32 (value, (char *) buffer);
+      break;
+    default:
+      abort ();
+    }
+#endif
+
+  /* ??? Rather than scanning the syntax string again, we could store
+     in `fields' a null terminated list of the fields that are present.  */
+
+  for (syn = CGEN_SYNTAX_STRING (syntax); *syn != '\0'; ++syn)
+    {
+      if (CGEN_SYNTAX_CHAR_P (*syn))
+	continue;
+
+      @arch@_cgen_insert_operand (CGEN_SYNTAX_FIELD (*syn), fields, buffer);
+    }
+}
+
+/* Main entry point.
+   This routine is called for each instruction to be assembled.
+   STR points to the insn to be assembled.
+   We assume all necessary tables have been initialized.
+   The result is a pointer to the insn's entry in the opcode table,
+   or NULL if an error occured (an error message will have already been
+   printed).  */
+
+const CGEN_INSN *
+@arch@_cgen_assemble_insn (str, fields, buf, errmsg)
+     const char *str;
+     CGEN_FIELDS *fields;
+     cgen_insn_t *buf;
+     char **errmsg;
+{
+  const char *start;
+  CGEN_INSN_LIST *ilist;
+
+  /* Skip leading white space.  */
+  while (isspace (*str))
+    ++str;
+
+  /* The instructions are stored in hashed lists.
+     Get the first in the list.  */
+  ilist = CGEN_ASM_LOOKUP_INSN (str);
+
+  /* Keep looking until we find a match.  */
+
+  start = str;
+  for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
+    {
+      const CGEN_INSN *insn = ilist->insn;
+
+#if 0 /* not needed as unsupported opcodes shouldn't be in the hash lists */
+      /* Is this insn supported by the selected cpu?  */
+      if (! @arch@_cgen_insn_supported (insn))
+	continue;
+#endif
+
+#if 1 /* FIXME: wip */
+      /* If the RELAX attribute is set, this is an insn that shouldn't be
+	 chosen immediately.  Instead, it is used during assembler/linker
+	 relaxation if possible.  */
+      if (CGEN_INSN_ATTR (insn, CGEN_INSN_RELAX) != 0)
+	continue;
+#endif
+
+      str = start;
+
+      /* Record a default length for the insn.  This will get set to the
+	 correct value while parsing.  */
+      /* FIXME: wip */
+      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
+
+      /* ??? The extent to which moving the parse and insert handlers into
+         this function (thus removing the function call) will speed things up
+	 is unclear.  The simplicity and flexibility of the current scheme is
+	 appropriate for now.  One could have the best of both worlds with
+	 inline functions but of course that would only work for gcc.  Since
+	 we're machine generating some code we could do that here too.  Maybe
+	 later.  */
+      if (! (*CGEN_PARSE_FN (insn)) (insn, &str, fields))
+	{
+	  (*CGEN_INSERT_FN (insn)) (insn, fields, buf);
+	  /* It is up to the caller to actually output the insn and any
+	     queued relocs.  */
+	  return insn;
+	}
+
+      /* Try the next entry.  */
+    }
+
+  /* FIXME: We can return a better error message than this.
+     Need to track why it failed and pick the right one.  */
+  {
+    static char errbuf[100];
+    sprintf (errbuf, "bad instruction `%.50s%s'",
+	     start, strlen (start) > 50 ? "..." : "");
+    *errmsg = errbuf;
+    return NULL;
+  }
+}
+
+#if 0 /* This calls back to GAS which we can't do without care.  */
+
+/* Record each member of OPVALS in the assembler's symbol table.
+   This lets GAS parse registers for us.
+   ??? Interesting idea but not currently used.  */
+
+/* Record each member of OPVALS in the assembler's symbol table.
+   FIXME: Not currently used.  */
+
+void
+@arch@_cgen_asm_hash_keywords (opvals)
+     CGEN_KEYWORD *opvals;
+{
+  CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
+  const CGEN_KEYWORD_ENTRY *ke;
+
+  while ((ke = cgen_keyword_search_next (&search)) != NULL)
+    {
+#if 0 /* Unnecessary, should be done in the search routine.  */
+      if (! @arch@_cgen_opval_supported (ke))
+	continue;
+#endif
+      cgen_asm_record_register (ke->name, ke->value);
+    }
+}
+
+#endif /* 0 */