* 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, 340 insertions, 0 deletions

diff --git a/opcodes/cgen-dis.in b/opcodes/cgen-dis.in
new file mode 100644
index 0000000..af3dfc6
--- /dev/null
+++ b/opcodes/cgen-dis.in
@@ -0,0 +1,340 @@
+/* Disassembler interface for targets using CGEN. -*- C -*-
+   CGEN: Cpu tools GENerator
+
+This file is used to generate @arch@-dis.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 <stdio.h>
+#include "ansidecl.h"
+#include "dis-asm.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.
+*/
+
+/* Default text to print if an instruction isn't recognized.  */
+#define UNKNOWN_INSN_MSG "*unknown*"
+
+/* FIXME: Machine generate.  */
+#ifndef CGEN_PCREL_OFFSET
+#define CGEN_PCREL_OFFSET 0
+#endif
+
+static int print_insn PARAMS ((bfd_vma, disassemble_info *, char *, int));
+
+static int extract_insn_normal
+     PARAMS ((const CGEN_INSN *, void *, cgen_insn_t, CGEN_FIELDS *));
+static void print_insn_normal
+     PARAMS ((void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int));
+
+/* Default extraction routine.
+
+   ATTRS is a mask of the boolean attributes.  We only need `unsigned',
+   but for generality we take a bitmask of all of them.  */
+
+static int
+extract_normal (buf_ctrl, insn_value, attrs, start, length, shift, total_length, valuep)
+     void *buf_ctrl;
+     cgen_insn_t insn_value;
+     unsigned int attrs;
+     int start, length, shift, total_length;
+     long *valuep;
+{
+  long value;
+
+#ifdef CGEN_INT_INSN
+#if 0
+  value = ((insn_value >> (CGEN_BASE_INSN_BITSIZE - (start + length)))
+	   & ((1 << length) - 1));
+#else
+  value = ((insn_value >> (total_length - (start + length)))
+	   & ((1 << length) - 1));
+#endif
+  if (! (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED))
+      && (value & (1 << (length - 1))))
+    value -= 1 << length;
+#else
+  /* FIXME: unfinished */
+#endif
+
+  /* This is backwards as we undo the effects of insert_normal.  */
+  if (shift < 0)
+    value >>= -shift;
+  else
+    value <<= shift;
+
+  *valuep = value;
+  return 1;
+}
+
+/* Default print handler.  */
+
+static void
+print_normal (dis_info, value, attrs, pc, length)
+     void *dis_info;
+     long value;
+     unsigned int attrs;
+     unsigned long pc; /* FIXME: should be bfd_vma */
+     int length;
+{
+  disassemble_info *info = dis_info;
+
+  /* Print the operand as directed by the attributes.  */
+  if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_FAKE))
+    ; /* nothing to do (??? at least not yet) */
+  else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_PCREL_ADDR))
+    (*info->print_address_func) (pc + CGEN_PCREL_OFFSET + value, info);
+  /* ??? Not all cases of this are currently caught.  */
+  else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_ABS_ADDR))
+    /* FIXME: Why & 0xffffffff?  */
+    (*info->print_address_func) ((bfd_vma) value & 0xffffffff, info);
+  else if (attrs & CGEN_ATTR_MASK (CGEN_OPERAND_UNSIGNED))
+    (*info->fprintf_func) (info->stream, "0x%lx", value);
+  else
+    (*info->fprintf_func) (info->stream, "%ld", value);
+}
+
+/* Keyword print handler.  */
+
+static void
+print_keyword (dis_info, keyword_table, value, attrs)
+     void *dis_info;
+     CGEN_KEYWORD *keyword_table;
+     long value;
+     CGEN_ATTR *attrs;
+{
+  disassemble_info *info = dis_info;
+  const CGEN_KEYWORD_ENTRY *ke;
+
+  ke = cgen_keyword_lookup_value (keyword_table, value);
+  if (ke != NULL)
+    (*info->fprintf_func) (info->stream, "%s", ke->name);
+  else
+    (*info->fprintf_func) (info->stream, "???");
+}
+
+/* -- disassembler routines inserted here */
+
+/* Default insn extractor.
+
+   The extracted fields are stored in DIS_FLDS.
+   BUF_CTRL is used to handle reading variable length insns (FIXME: not done).
+   Return the length of the insn in bits, or 0 if no match.  */
+
+static int
+extract_insn_normal (insn, buf_ctrl, insn_value, fields)
+     const CGEN_INSN *insn;
+     void *buf_ctrl;
+     cgen_insn_t insn_value;
+     CGEN_FIELDS *fields;
+{
+  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+  const unsigned char *syn;
+
+  CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
+
+  CGEN_INIT_EXTRACT ();
+
+  for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
+    {
+      int length;
+
+      if (CGEN_SYNTAX_CHAR_P (*syn))
+	continue;
+
+      length = @arch@_cgen_extract_operand (CGEN_SYNTAX_FIELD (*syn),
+					   buf_ctrl, insn_value, fields);
+      if (length == 0)
+	return 0;
+    }
+
+  /* We recognized and successfully extracted this insn.  */
+  return CGEN_INSN_BITSIZE (insn);
+}
+
+/* Default insn printer.
+
+   DIS_INFO is defined as `void *' so the disassembler needn't know anything
+   about disassemble_info.
+*/
+
+static void
+print_insn_normal (dis_info, insn, fields, pc, length)
+     void *dis_info;
+     const CGEN_INSN *insn;
+     CGEN_FIELDS *fields;
+     bfd_vma pc;
+     int length;
+{
+  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+  disassemble_info *info = dis_info;
+  const unsigned char *syn;
+
+  CGEN_INIT_PRINT ();
+
+  for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
+    {
+      if (CGEN_SYNTAX_MNEMONIC_P (*syn))
+	{
+	  (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
+	  continue;
+	}
+      if (CGEN_SYNTAX_CHAR_P (*syn))
+	{
+	  (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
+	  continue;
+	}
+
+      /* We have an operand.  */
+      @arch@_cgen_print_operand (CGEN_SYNTAX_FIELD (*syn), info,
+				fields, CGEN_INSN_ATTRS (insn), pc, length);
+    }
+}
+
+/* Default value for CGEN_PRINT_INSN.
+   Given BUFLEN bytes (target byte order) read into BUF, look up the
+   insn in the instruction table and disassemble it.
+
+   The result is the size of the insn in bytes.  */
+
+#ifndef CGEN_PRINT_INSN
+#define CGEN_PRINT_INSN print_insn
+#endif
+
+static int
+print_insn (pc, info, buf, buflen)
+     bfd_vma pc;
+     disassemble_info *info;
+     char *buf;
+     int buflen;
+{
+  int i;
+  unsigned long insn_value;
+  const CGEN_INSN_LIST *insn_list;
+
+  switch (buflen)
+    {
+    case 8:
+      insn_value = buf[0];
+      break;
+    case 16:
+      insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb16 (buf) : bfd_getl16 (buf);
+      break;
+    case 32:
+      insn_value = info->endian == BFD_ENDIAN_BIG ? bfd_getb32 (buf) : bfd_getl32 (buf);
+      break;
+    default:
+      abort ();
+    }
+
+  /* The instructions are stored in hash lists.
+     Pick the first one and keep trying until we find the right one.  */
+
+  insn_list = CGEN_DIS_LOOKUP_INSN (buf, insn_value);
+  while (insn_list != NULL)
+    {
+      const CGEN_INSN *insn = insn_list->insn;
+      const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+      CGEN_FIELDS fields;
+      int length;
+
+#if 0 /* not needed as insn shouldn't be in hash lists if not supported */
+      /* Supported by this cpu?  */
+      if (! @arch@_cgen_insn_supported (insn))
+	continue;
+#endif
+
+      /* Basic bit mask must be correct.  */
+      /* ??? May wish to allow target to defer this check until the extract
+	 handler.  */
+      if ((insn_value & CGEN_INSN_MASK (insn)) == CGEN_INSN_VALUE (insn))
+	{
+	  /* Printing is handled in two passes.  The first pass parses the
+	     machine insn and extracts the fields.  The second pass prints
+	     them.  */
+
+	  length = (*CGEN_EXTRACT_FN (insn)) (insn, NULL, insn_value, &fields);
+	  if (length > 0)
+	    {
+	      (*CGEN_PRINT_FN (insn)) (info, insn, &fields, pc, length);
+	      /* length is in bits, result is in bytes */
+	      return length / 8;
+	    }
+	}
+
+      insn_list = CGEN_DIS_NEXT_INSN (insn_list);
+    }
+
+  return 0;
+}
+
+/* Main entry point.
+   Print one instruction from PC on INFO->STREAM.
+   Return the size of the instruction (in bytes).  */
+
+int
+print_insn_@arch@ (pc, info)
+     bfd_vma pc;
+     disassemble_info *info;
+{
+  char buffer[CGEN_MAX_INSN_SIZE];
+  int status, length;
+  static int initialized = 0;
+  static int current_mach = 0;
+  static int current_big_p = 0;
+  int mach = info->mach;
+  int big_p = info->endian == BFD_ENDIAN_BIG;
+
+  /* If we haven't initialized yet, or if we've switched cpu's, initialize.  */
+  if (!initialized || mach != current_mach || big_p != current_big_p)
+    {
+      initialized = 1;
+      current_mach = mach;
+      current_big_p = big_p;
+      @arch@_cgen_init_dis (mach, big_p ? CGEN_ENDIAN_BIG : CGEN_ENDIAN_LITTLE);
+    }
+
+  /* Read enough of the insn so we can look it up in the hash lists.  */
+
+  status = (*info->read_memory_func) (pc, buffer, CGEN_BASE_INSN_SIZE, info);
+  if (status != 0)
+    {
+      (*info->memory_error_func) (status, pc, info);
+      return -1;
+    }
+
+  /* We try to have as much common code as possible.
+     But at this point some targets need to take over.  */
+  /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
+     but if not possible try to move this hook elsewhere rather than
+     have two hooks.  */
+  length = CGEN_PRINT_INSN (pc, info, buffer, CGEN_BASE_INSN_BITSIZE);
+  if (length)
+    return length;
+
+  (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
+  return CGEN_DEFAULT_INSN_SIZE;
+}