2005-06-15 Dave Brolley <brolley@redhat.com>

        Contribute Morpho ms1 on behalf of Red Hat
        * ms1-asm.c, ms1-desc.c, ms1-dis.c, ms1-ibld.c, ms1-opc.c,
        ms1-opc.h: New files, Morpho ms1 target.

        2004-05-14  Stan Cox  <scox@redhat.com>

        * disassemble.c (ARCH_ms1): Define.
        (disassembler): Handle bfd_arch_ms1

        2004-05-13  Michael Snyder  <msnyder@redhat.com>

        * Makefile.am, Makefile.in: Add ms1 target.
        * configure.in: Ditto.

1 files changed, 978 insertions, 0 deletions

diff --git a/opcodes/ms1-asm.c b/opcodes/ms1-asm.c
new file mode 100644
index 0000000..0b65226
--- /dev/null
+++ b/opcodes/ms1-asm.c
@@ -0,0 +1,978 @@
+/* Assembler interface for targets using CGEN. -*- C -*-
+   CGEN: Cpu tools GENerator
+
+THIS FILE IS MACHINE GENERATED WITH CGEN.
+- the resultant file is machine generated, cgen-asm.in isn't
+
+Copyright 1996, 1997, 1998, 1999, 2000, 2001 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.,
+51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* ??? Eventually more and more of this stuff can go to cpu-independent files.
+   Keep that in mind.  */
+
+#include "sysdep.h"
+#include <stdio.h>
+#include "ansidecl.h"
+#include "bfd.h"
+#include "symcat.h"
+#include "ms1-desc.h"
+#include "ms1-opc.h"
+#include "opintl.h"
+#include "xregex.h"
+#include "libiberty.h"
+#include "safe-ctype.h"
+
+#undef  min
+#define min(a,b) ((a) < (b) ? (a) : (b))
+#undef  max
+#define max(a,b) ((a) > (b) ? (a) : (b))
+
+static const char * parse_insn_normal
+  (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
+
+/* -- assembler routines inserted here.  */
+
+/* -- asm.c */
+static int signed_out_of_bounds (long);
+static const char * parse_imm16 (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_dup   (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_ball  (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_xmode (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_rc    (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_cbrb  (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_rbbc  (CGEN_CPU_DESC, const char **, int, long *);
+static const char * parse_type  (CGEN_CPU_DESC, const char **, int, long *);
+
+/* Range checking for signed numbers.  Returns 0 if acceptable
+   and 1 if the value is out of bounds for a signed quantity.  */
+
+static int 
+signed_out_of_bounds (long val)
+{
+  if ((val < -32768) || (val > 32767))
+    return 1;
+  return 0;
+}
+
+static const char *
+parse_imm16 (CGEN_CPU_DESC cd,
+	     const char **strp,
+	     int opindex,
+	     long *valuep)
+{
+  const char *errmsg;
+  enum cgen_parse_operand_result result_type;
+  bfd_reloc_code_real_type code = BFD_RELOC_NONE;
+  bfd_vma value;
+
+  /* Is it a control transfer instructions?  */ 
+  if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_IMM16O)
+    {
+      code = BFD_RELOC_16_PCREL;
+      errmsg = cgen_parse_address (cd, strp, opindex, code,
+                                   & result_type, & value);
+      if (errmsg == NULL)
+	{
+	  if (signed_out_of_bounds (value))
+	    errmsg = _("Operand out of range. Must be between -32768 and 32767.");
+	}
+      *valuep = value;
+      return errmsg;
+    }
+
+  /* If it's not a control transfer instruction, then
+     we have to check for %OP relocating operators.  */
+  if (strncmp (*strp, "%hi16", 5) == 0)
+    {
+      *strp += 5;
+      code = BFD_RELOC_HI16;
+    }
+  else if (strncmp (*strp, "%lo16", 5) == 0)
+    {
+      *strp += 5;
+      code = BFD_RELOC_LO16;
+    }
+
+  /* If we found a %OP relocating operator, then parse it as an address.
+     If not, we need to parse it as an integer, either signed or unsigned
+     depending on which operand type we have.  */
+  if (code != BFD_RELOC_NONE)
+    {
+       /* %OP relocating operator found.  */
+       errmsg = cgen_parse_address (cd, strp, opindex, code,
+                                   & result_type, & value);
+       if (errmsg == NULL)
+	 {
+           switch (result_type)
+	     {
+	     case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
+	       if (code == BFD_RELOC_HI16)
+		 value = (value >> 16) & 0xFFFF;
+	       else if (code == BFD_RELOC_LO16)
+		 value = value  & 0xFFFF;
+	       else 
+		 errmsg = _("Biiiig Trouble in parse_imm16!");
+	       break;
+
+	     case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
+	       /* No special processing for this case.  */
+	       break;
+
+	     default:
+	       errmsg = _("%operator operand is not a symbol");
+	       break;
+             }
+	 }
+       *valuep = value;
+    }
+  else
+    {
+      /* Parse hex values like 0xffff as unsigned, and sign extend
+	 them manually.  */
+      int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MS1_OPERAND_IMM16);
+
+      if ((*strp)[0] == '0'
+	  && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
+	parse_signed = 0;
+
+      /* No relocating operator.  Parse as an number.  */
+      if (parse_signed)
+	{
+          /* Parse as as signed integer.  */
+ 
+          errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
+
+          if (errmsg == NULL) 
+	    {
+#if 0
+	      /* Manual range checking is needed for the signed case.  */
+	      if (*valuep & 0x8000)
+                value = 0xffff0000 | *valuep;
+	      else 
+                value = *valuep;
+
+	      if (signed_out_of_bounds (value))
+	        errmsg = _("Operand out of range. Must be between -32768 and 32767.");
+	      /* Truncate to 16 bits. This is necessary
+		 because cgen will have sign extended *valuep.  */
+	      *valuep &= 0xFFFF; 
+#endif
+	    }
+	}
+      else  
+	{
+          /* MS1_OPERAND_IMM16Z.  Parse as an unsigned integer.  */
+          errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+	  if (opindex == (CGEN_OPERAND_TYPE)MS1_OPERAND_IMM16
+	      && *valuep >= 0x8000
+	      && *valuep <= 0xffff)
+	    *valuep -= 0x10000;
+	}
+    }
+
+  return errmsg;
+}
+
+
+static const char *
+parse_dup (CGEN_CPU_DESC cd,
+	   const char **strp,
+	   int opindex,
+	   long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 0;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+
+static const char *
+parse_ball (CGEN_CPU_DESC cd,
+	    const char **strp,
+	    int opindex,
+	    long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 0;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+static const char *
+parse_xmode (CGEN_CPU_DESC cd,
+	     const char **strp,
+	     int opindex,
+	     long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 0;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+static const char *
+parse_rc (CGEN_CPU_DESC cd,
+	  const char **strp,
+	  int opindex,
+	  long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
+    {
+      *strp += 1;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
+    {
+      *strp += 1;
+      *valuep = 0;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+static const char *
+parse_cbrb (CGEN_CPU_DESC cd,
+	    const char **strp,
+	    int opindex,
+	    long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 0;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+static const char *
+parse_rbbc (CGEN_CPU_DESC cd,
+	    const char **strp,
+	    int opindex,
+	    long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 0;
+    }
+  else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 2;
+    }
+  else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 3;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+  return errmsg;
+}
+
+static const char *
+parse_type (CGEN_CPU_DESC cd,
+	    const char **strp,
+	    int opindex,
+	    long *valuep)
+{
+  const char *errmsg = NULL;
+
+  if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
+    {
+      *strp += 3;
+      *valuep = 0;
+    }
+  else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
+    {
+      *strp += 4;
+      *valuep = 1;
+    }
+  else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
+    {
+      *strp += 2;
+      *valuep = 2;
+    }
+  else
+    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
+
+ if ((errmsg == NULL) && (*valuep == 3))
+    errmsg = _("invalid operand.  type may have values 0,1,2 only.");
+
+  return errmsg;
+}
+
+/* -- dis.c */
+
+const char * ms1_cgen_parse_operand
+  PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *));
+
+/* Main entry point for operand parsing.
+
+   This function is basically just a big switch statement.  Earlier versions
+   used tables to look up the function to use, but
+   - if the table contains both assembler and disassembler functions then
+     the disassembler contains much of the assembler and vice-versa,
+   - there's a lot of inlining possibilities as things grow,
+   - using a switch statement avoids the function call overhead.
+
+   This function could be moved into `parse_insn_normal', but keeping it
+   separate makes clear the interface between `parse_insn_normal' and each of
+   the handlers.  */
+
+const char *
+ms1_cgen_parse_operand (cd, opindex, strp, fields)
+     CGEN_CPU_DESC cd;
+     int opindex;
+     const char ** strp;
+     CGEN_FIELDS * fields;
+{
+  const char * errmsg = NULL;
+  /* Used by scalar operands that still need to be parsed.  */
+  long junk ATTRIBUTE_UNUSED;
+
+  switch (opindex)
+    {
+    case MS1_OPERAND_A23 :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_A23, (unsigned long *) (& fields->f_a23));
+      break;
+    case MS1_OPERAND_BALL :
+      errmsg = parse_ball (cd, strp, MS1_OPERAND_BALL, (unsigned long *) (& fields->f_ball));
+      break;
+    case MS1_OPERAND_BALL2 :
+      errmsg = parse_ball (cd, strp, MS1_OPERAND_BALL2, (unsigned long *) (& fields->f_ball2));
+      break;
+    case MS1_OPERAND_BANKADDR :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_BANKADDR, (unsigned long *) (& fields->f_bankaddr));
+      break;
+    case MS1_OPERAND_BRC :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_BRC, (unsigned long *) (& fields->f_brc));
+      break;
+    case MS1_OPERAND_BRC2 :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_BRC2, (unsigned long *) (& fields->f_brc2));
+      break;
+    case MS1_OPERAND_CBRB :
+      errmsg = parse_cbrb (cd, strp, MS1_OPERAND_CBRB, (unsigned long *) (& fields->f_cbrb));
+      break;
+    case MS1_OPERAND_CBS :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CBS, (unsigned long *) (& fields->f_cbs));
+      break;
+    case MS1_OPERAND_CBX :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CBX, (unsigned long *) (& fields->f_cbx));
+      break;
+    case MS1_OPERAND_CCB :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CCB, (unsigned long *) (& fields->f_ccb));
+      break;
+    case MS1_OPERAND_CDB :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CDB, (unsigned long *) (& fields->f_cdb));
+      break;
+    case MS1_OPERAND_CELL :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CELL, (unsigned long *) (& fields->f_cell));
+      break;
+    case MS1_OPERAND_COLNUM :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_COLNUM, (unsigned long *) (& fields->f_colnum));
+      break;
+    case MS1_OPERAND_CONTNUM :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CONTNUM, (unsigned long *) (& fields->f_contnum));
+      break;
+    case MS1_OPERAND_CR :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CR, (unsigned long *) (& fields->f_cr));
+      break;
+    case MS1_OPERAND_CTXDISP :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_CTXDISP, (unsigned long *) (& fields->f_ctxdisp));
+      break;
+    case MS1_OPERAND_DUP :
+      errmsg = parse_dup (cd, strp, MS1_OPERAND_DUP, (unsigned long *) (& fields->f_dup));
+      break;
+    case MS1_OPERAND_FBDISP :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_FBDISP, (unsigned long *) (& fields->f_fbdisp));
+      break;
+    case MS1_OPERAND_FBINCR :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_FBINCR, (unsigned long *) (& fields->f_fbincr));
+      break;
+    case MS1_OPERAND_FRDR :
+      errmsg = cgen_parse_keyword (cd, strp, & ms1_cgen_opval_h_spr, & fields->f_dr);
+      break;
+    case MS1_OPERAND_FRDRRR :
+      errmsg = cgen_parse_keyword (cd, strp, & ms1_cgen_opval_h_spr, & fields->f_drrr);
+      break;
+    case MS1_OPERAND_FRSR1 :
+      errmsg = cgen_parse_keyword (cd, strp, & ms1_cgen_opval_h_spr, & fields->f_sr1);
+      break;
+    case MS1_OPERAND_FRSR2 :
+      errmsg = cgen_parse_keyword (cd, strp, & ms1_cgen_opval_h_spr, & fields->f_sr2);
+      break;
+    case MS1_OPERAND_ID :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_ID, (unsigned long *) (& fields->f_id));
+      break;
+    case MS1_OPERAND_IMM16 :
+      errmsg = parse_imm16 (cd, strp, MS1_OPERAND_IMM16, (long *) (& fields->f_imm16s));
+      break;
+    case MS1_OPERAND_IMM16O :
+      errmsg = parse_imm16 (cd, strp, MS1_OPERAND_IMM16O, (unsigned long *) (& fields->f_imm16s));
+      break;
+    case MS1_OPERAND_IMM16Z :
+      errmsg = parse_imm16 (cd, strp, MS1_OPERAND_IMM16Z, (unsigned long *) (& fields->f_imm16u));
+      break;
+    case MS1_OPERAND_INCAMT :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_INCAMT, (unsigned long *) (& fields->f_incamt));
+      break;
+    case MS1_OPERAND_INCR :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_INCR, (unsigned long *) (& fields->f_incr));
+      break;
+    case MS1_OPERAND_LENGTH :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_LENGTH, (unsigned long *) (& fields->f_length));
+      break;
+    case MS1_OPERAND_MASK :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
+      break;
+    case MS1_OPERAND_MASK1 :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_MASK1, (unsigned long *) (& fields->f_mask1));
+      break;
+    case MS1_OPERAND_MODE :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_MODE, (unsigned long *) (& fields->f_mode));
+      break;
+    case MS1_OPERAND_PERM :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_PERM, (unsigned long *) (& fields->f_perm));
+      break;
+    case MS1_OPERAND_RBBC :
+      errmsg = parse_rbbc (cd, strp, MS1_OPERAND_RBBC, (unsigned long *) (& fields->f_rbbc));
+      break;
+    case MS1_OPERAND_RC :
+      errmsg = parse_rc (cd, strp, MS1_OPERAND_RC, (unsigned long *) (& fields->f_rc));
+      break;
+    case MS1_OPERAND_RC1 :
+      errmsg = parse_rc (cd, strp, MS1_OPERAND_RC1, (unsigned long *) (& fields->f_rc1));
+      break;
+    case MS1_OPERAND_RC2 :
+      errmsg = parse_rc (cd, strp, MS1_OPERAND_RC2, (unsigned long *) (& fields->f_rc2));
+      break;
+    case MS1_OPERAND_RCNUM :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_RCNUM, (unsigned long *) (& fields->f_rcnum));
+      break;
+    case MS1_OPERAND_RDA :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_RDA, (unsigned long *) (& fields->f_rda));
+      break;
+    case MS1_OPERAND_ROWNUM :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_ROWNUM, (unsigned long *) (& fields->f_rownum));
+      break;
+    case MS1_OPERAND_ROWNUM1 :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_ROWNUM1, (unsigned long *) (& fields->f_rownum1));
+      break;
+    case MS1_OPERAND_ROWNUM2 :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_ROWNUM2, (unsigned long *) (& fields->f_rownum2));
+      break;
+    case MS1_OPERAND_SIZE :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_SIZE, (unsigned long *) (& fields->f_size));
+      break;
+    case MS1_OPERAND_TYPE :
+      errmsg = parse_type (cd, strp, MS1_OPERAND_TYPE, (unsigned long *) (& fields->f_type));
+      break;
+    case MS1_OPERAND_WR :
+      errmsg = cgen_parse_unsigned_integer (cd, strp, MS1_OPERAND_WR, (unsigned long *) (& fields->f_wr));
+      break;
+    case MS1_OPERAND_XMODE :
+      errmsg = parse_xmode (cd, strp, MS1_OPERAND_XMODE, (unsigned long *) (& fields->f_xmode));
+      break;
+
+    default :
+      /* xgettext:c-format */
+      fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
+      abort ();
+  }
+
+  return errmsg;
+}
+
+cgen_parse_fn * const ms1_cgen_parse_handlers[] = 
+{
+  parse_insn_normal,
+};
+
+void
+ms1_cgen_init_asm (cd)
+     CGEN_CPU_DESC cd;
+{
+  ms1_cgen_init_opcode_table (cd);
+  ms1_cgen_init_ibld_table (cd);
+  cd->parse_handlers = & ms1_cgen_parse_handlers[0];
+  cd->parse_operand = ms1_cgen_parse_operand;
+}
+
+
+
+/* Regex construction routine.
+
+   This translates an opcode syntax string into a regex string,
+   by replacing any non-character syntax element (such as an
+   opcode) with the pattern '.*'
+
+   It then compiles the regex and stores it in the opcode, for
+   later use by ms1_cgen_assemble_insn
+
+   Returns NULL for success, an error message for failure.  */
+
+char * 
+ms1_cgen_build_insn_regex (CGEN_INSN *insn)
+{  
+  CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
+  const char *mnem = CGEN_INSN_MNEMONIC (insn);
+  char rxbuf[CGEN_MAX_RX_ELEMENTS];
+  char *rx = rxbuf;
+  const CGEN_SYNTAX_CHAR_TYPE *syn;
+  int reg_err;
+
+  syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
+
+  /* Mnemonics come first in the syntax string.  */
+  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
+    return _("missing mnemonic in syntax string");
+  ++syn;
+
+  /* Generate a case sensitive regular expression that emulates case
+     insensitive matching in the "C" locale.  We cannot generate a case
+     insensitive regular expression because in Turkish locales, 'i' and 'I'
+     are not equal modulo case conversion.  */
+
+  /* Copy the literal mnemonic out of the insn.  */
+  for (; *mnem; mnem++)
+    {
+      char c = *mnem;
+
+      if (ISALPHA (c))
+	{
+	  *rx++ = '[';
+	  *rx++ = TOLOWER (c);
+	  *rx++ = TOUPPER (c);
+	  *rx++ = ']';
+	}
+      else
+	*rx++ = c;
+    }
+
+  /* Copy any remaining literals from the syntax string into the rx.  */
+  for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
+    {
+      if (CGEN_SYNTAX_CHAR_P (* syn)) 
+	{
+	  char c = CGEN_SYNTAX_CHAR (* syn);
+
+	  switch (c) 
+	    {
+	      /* Escape any regex metacharacters in the syntax.  */
+	    case '.': case '[': case '\\': 
+	    case '*': case '^': case '$': 
+
+#ifdef CGEN_ESCAPE_EXTENDED_REGEX
+	    case '?': case '{': case '}': 
+	    case '(': case ')': case '*':
+	    case '|': case '+': case ']':
+#endif
+	      *rx++ = '\\';
+	      *rx++ = c;
+	      break;
+
+	    default:
+	      if (ISALPHA (c))
+		{
+		  *rx++ = '[';
+		  *rx++ = TOLOWER (c);
+		  *rx++ = TOUPPER (c);
+		  *rx++ = ']';
+		}
+	      else
+		*rx++ = c;
+	      break;
+	    }
+	}
+      else
+	{
+	  /* Replace non-syntax fields with globs.  */
+	  *rx++ = '.';
+	  *rx++ = '*';
+	}
+    }
+
+  /* Trailing whitespace ok.  */
+  * rx++ = '['; 
+  * rx++ = ' '; 
+  * rx++ = '\t'; 
+  * rx++ = ']'; 
+  * rx++ = '*'; 
+
+  /* But anchor it after that.  */
+  * rx++ = '$'; 
+  * rx = '\0';
+
+  CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
+  reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
+
+  if (reg_err == 0) 
+    return NULL;
+  else
+    {
+      static char msg[80];
+
+      regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
+      regfree ((regex_t *) CGEN_INSN_RX (insn));
+      free (CGEN_INSN_RX (insn));
+      (CGEN_INSN_RX (insn)) = NULL;
+      return msg;
+    }
+}
+
+
+/* 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 (CGEN_CPU_DESC cd,
+		   const CGEN_INSN *insn,
+		   const char **strp,
+		   CGEN_FIELDS *fields)
+{
+  /* ??? Runtime added insns not handled yet.  */
+  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
+  const char *str = *strp;
+  const char *errmsg;
+  const char *p;
+  const CGEN_SYNTAX_CHAR_TYPE * syn;
+#ifdef CGEN_MNEMONIC_OPERANDS
+  /* FIXME: wip */
+  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.
+     GAS's input scrubber will ensure mnemonics are lowercase, but we may
+     not be called from GAS.  */
+  p = CGEN_INSN_MNEMONIC (insn);
+  while (*p && TOLOWER (*p) == TOLOWER (*str))
+    ++p, ++str;
+
+  if (* p)
+    return _("unrecognized instruction");
+
+#ifndef CGEN_MNEMONIC_OPERANDS
+  if (* str && ! ISSPACE (* str))
+    return _("unrecognized instruction");
+#endif
+
+  CGEN_INIT_PARSE (cd);
+  cgen_init_parse_operand (cd);
+#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 (syntax);
+
+  /* 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.  */
+      if (CGEN_SYNTAX_CHAR_P (* syn))
+	{
+	  /* FIXME: While we allow for non-GAS callers above, we assume the
+	     first char after the mnemonic part is a space.  */
+	  /* FIXME: We also take inappropriate advantage of the fact that
+	     GAS's input scrubber will remove extraneous blanks.  */
+	  if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
+	    {
+#ifdef CGEN_MNEMONIC_OPERANDS
+	      if (CGEN_SYNTAX_CHAR(* syn) == ' ')
+		past_opcode_p = 1;
+#endif
+	      ++ syn;
+	      ++ str;
+	    }
+	  else if (*str)
+	    {
+	      /* Syntax char didn't match.  Can't be this insn.  */
+	      static char msg [80];
+
+	      /* xgettext:c-format */
+	      sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
+		       CGEN_SYNTAX_CHAR(*syn), *str);
+	      return msg;
+	    }
+	  else
+	    {
+	      /* Ran out of input.  */
+	      static char msg [80];
+
+	      /* xgettext:c-format */
+	      sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
+		       CGEN_SYNTAX_CHAR(*syn));
+	      return msg;
+	    }
+	  continue;
+	}
+
+      /* We have an operand of some sort.  */
+      errmsg = cd->parse_operand (cd, 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");
+}
+
+/* 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 assembled instruction, less any fixups, is stored in BUF.
+   Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
+   still needs to be converted to target byte order, otherwise BUF is an array
+   of bytes in target byte order.
+   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).
+
+   Note that when processing (non-alias) macro-insns,
+   this function recurses.
+
+   ??? It's possible to make this cpu-independent.
+   One would have to deal with a few minor things.
+   At this point in time doing so would be more of a curiosity than useful
+   [for example this file isn't _that_ big], but keeping the possibility in
+   mind helps keep the design clean.  */
+
+const CGEN_INSN *
+ms1_cgen_assemble_insn (CGEN_CPU_DESC cd,
+			   const char *str,
+			   CGEN_FIELDS *fields,
+			   CGEN_INSN_BYTES_PTR buf,
+			   char **errmsg)
+{
+  const char *start;
+  CGEN_INSN_LIST *ilist;
+  const char *parse_errmsg = NULL;
+  const char *insert_errmsg = NULL;
+  int recognized_mnemonic = 0;
+
+  /* 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 (cd, 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;
+      recognized_mnemonic = 1;
+
+#ifdef CGEN_VALIDATE_INSN_SUPPORTED 
+      /* Not usually needed as unsupported opcodes
+	 shouldn't be in the hash lists.  */
+      /* Is this insn supported by the selected cpu?  */
+      if (! ms1_cgen_insn_supported (cd, insn))
+	continue;
+#endif
+      /* If the RELAXED 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_VALUE (insn, CGEN_INSN_RELAXED) != 0)
+	continue;
+
+      str = start;
+
+      /* Skip this insn if str doesn't look right lexically.  */
+      if (CGEN_INSN_RX (insn) != NULL &&
+	  regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
+	continue;
+
+      /* Allow parse/insert handlers to obtain length of insn.  */
+      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
+
+      parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
+      if (parse_errmsg != NULL)
+	continue;
+
+      /* ??? 0 is passed for `pc'.  */
+      insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
+						 (bfd_vma) 0);
+      if (insert_errmsg != NULL)
+        continue;
+
+      /* It is up to the caller to actually output the insn and any
+         queued relocs.  */
+      return insn;
+    }
+
+  {
+    static char errbuf[150];
+#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
+    const char *tmp_errmsg;
+
+    /* If requesting verbose error messages, use insert_errmsg.
+       Failing that, use parse_errmsg.  */
+    tmp_errmsg = (insert_errmsg ? insert_errmsg :
+		  parse_errmsg ? parse_errmsg :
+		  recognized_mnemonic ?
+		  _("unrecognized form of instruction") :
+		  _("unrecognized instruction"));
+
+    if (strlen (start) > 50)
+      /* xgettext:c-format */
+      sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
+    else 
+      /* xgettext:c-format */
+      sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
+#else
+    if (strlen (start) > 50)
+      /* xgettext:c-format */
+      sprintf (errbuf, _("bad instruction `%.50s...'"), start);
+    else 
+      /* xgettext:c-format */
+      sprintf (errbuf, _("bad instruction `%.50s'"), start);
+#endif
+      
+    *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
+ms1_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, 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 (! ms1_cgen_opval_supported (ke))
+	continue;
+#endif
+      cgen_asm_record_register (cd, ke->name, ke->value);
+    }
+}
+
+#endif /* 0 */