19990502 sourceware importbinu_ss_19990502

1 files changed, 1589 insertions, 0 deletions

diff --git a/gas/config/tc-z8k.c b/gas/config/tc-z8k.c
new file mode 100644
index 0000000..1611341
--- /dev/null
+++ b/gas/config/tc-z8k.c
@@ -0,0 +1,1589 @@
+/* tc-z8k.c -- Assemble code for the Zilog Z800n
+   Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation.
+
+   This file is part of GAS, the GNU Assembler.
+
+   GAS 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.
+
+   GAS 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 GAS; see the file COPYING.  If not, write to the Free
+   Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+/*
+  Written By Steve Chamberlain
+  sac@cygnus.com
+  */
+#define DEFINE_TABLE
+#include <stdio.h>
+
+#include "opcodes/z8k-opc.h"
+
+#include "as.h"
+#include "bfd.h"
+#include <ctype.h>
+
+const char comment_chars[] =
+{'!', 0};
+const char line_separator_chars[] =
+{';', 0};
+const char line_comment_chars[] =
+{'#', 0};
+
+extern int machine;
+extern int coff_flags;
+int segmented_mode;
+const int md_reloc_size;
+
+/* This table describes all the machine specific pseudo-ops the assembler
+   has to support.  The fields are:
+   pseudo-op name without dot
+   function to call to execute this pseudo-op
+   Integer arg to pass to the function
+   */
+
+void cons ();
+
+void
+s_segm ()
+{
+  segmented_mode = 1;
+  machine = bfd_mach_z8001;
+  coff_flags = F_Z8001;
+}
+
+void
+s_unseg ()
+{
+  segmented_mode = 0;
+  machine = bfd_mach_z8002;
+  coff_flags = F_Z8002;
+}
+
+static
+void
+even ()
+{
+  frag_align (1, 0, 0);
+  record_alignment (now_seg, 1);
+}
+
+void obj_coff_section ();
+
+int
+tohex (c)
+     int c;
+{
+  if (isdigit (c))
+    return c - '0';
+  if (islower (c))
+    return c - 'a' + 10;
+  return c - 'A' + 10;
+}
+
+void
+sval ()
+{
+
+  SKIP_WHITESPACE ();
+  if (*input_line_pointer == '\'')
+    {
+      int c;
+      input_line_pointer++;
+      c = *input_line_pointer++;
+      while (c != '\'')
+	{
+	  if (c == '%')
+	    {
+	      c = (tohex (input_line_pointer[0]) << 4)
+		| tohex (input_line_pointer[1]);
+	      input_line_pointer += 2;
+	    }
+	  FRAG_APPEND_1_CHAR (c);
+	  c = *input_line_pointer++;
+	}
+      demand_empty_rest_of_line ();
+    }
+
+}
+const pseudo_typeS md_pseudo_table[] =
+{
+  {"int", cons, 2},
+  {"data.b", cons, 1},
+  {"data.w", cons, 2},
+  {"data.l", cons, 4},
+  {"form", listing_psize, 0},
+  {"heading", listing_title, 0},
+  {"import", s_ignore, 0},
+  {"page", listing_eject, 0},
+  {"program", s_ignore, 0},
+  {"z8001", s_segm, 0},
+  {"z8002", s_unseg, 0},
+
+
+  {"segm", s_segm, 0},
+  {"unsegm", s_unseg, 0},
+  {"unseg", s_unseg, 0},
+  {"name", s_app_file, 0},
+  {"global", s_globl, 0},
+  {"wval", cons, 2},
+  {"lval", cons, 4},
+  {"bval", cons, 1},
+  {"sval", sval, 0},
+  {"rsect", obj_coff_section, 0},
+  {"sect", obj_coff_section, 0},
+  {"block", s_space, 0},
+  {"even", even, 0},
+  {0, 0, 0}
+};
+
+const char EXP_CHARS[] = "eE";
+
+/* Chars that mean this number is a floating point constant */
+/* As in 0f12.456 */
+/* or    0d1.2345e12 */
+const char FLT_CHARS[] = "rRsSfFdDxXpP";
+
+static struct hash_control *opcode_hash_control;	/* Opcode mnemonics */
+
+void
+md_begin ()
+{
+  opcode_entry_type *opcode;
+  char *prev_name = "";
+  int idx = 0;
+
+  opcode_hash_control = hash_new ();
+
+  for (opcode = z8k_table; opcode->name; opcode++)
+    {
+      /* Only enter unique codes into the table */
+      char *src = opcode->name;
+
+      if (strcmp (opcode->name, prev_name))
+	{
+	  hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+	  idx++;
+	}
+      opcode->idx = idx;
+      prev_name = opcode->name;
+    }
+
+  /* default to z8002 */
+  s_unseg ();
+
+  /* insert the pseudo ops too */
+  for (idx = 0; md_pseudo_table[idx].poc_name; idx++)
+    {
+      opcode_entry_type *fake_opcode;
+      fake_opcode = (opcode_entry_type *) malloc (sizeof (opcode_entry_type));
+      fake_opcode->name = md_pseudo_table[idx].poc_name,
+	fake_opcode->func = (void *) (md_pseudo_table + idx);
+      fake_opcode->opcode = 250;
+      hash_insert (opcode_hash_control, fake_opcode->name, fake_opcode);
+    }
+
+  linkrelax = 1;
+}
+
+struct z8k_exp
+{
+  char *e_beg;
+  char *e_end;
+  expressionS e_exp;
+};
+typedef struct z8k_op
+{
+  char regsize;			/* 'b','w','r','q' */
+  unsigned int reg;		/* 0..15 */
+
+  int mode;
+
+  unsigned int x_reg;		/* any other register associated with the mode */
+  expressionS exp;		/* any expression */
+}
+
+op_type;
+
+static expressionS *da_operand;
+static expressionS *imm_operand;
+
+int reg[16];
+int the_cc;
+int the_ctrl;
+int the_flags;
+int the_interrupt;
+
+char *
+DEFUN (whatreg, (reg, src),
+       int *reg AND
+       char *src)
+{
+  if (isdigit (src[1]))
+    {
+      *reg = (src[0] - '0') * 10 + src[1] - '0';
+      return src + 2;
+    }
+  else
+    {
+      *reg = (src[0] - '0');
+      return src + 1;
+    }
+}
+
+/*
+  parse operands
+
+  rh0-rh7, rl0-rl7
+  r0-r15
+  rr0-rr14
+  rq0--rq12
+  WREG r0,r1,r2,r3,r4,r5,r6,r7,fp,sp
+  r0l,r0h,..r7l,r7h
+  @WREG
+  @WREG+
+  @-WREG
+  #const
+
+  */
+
+/* try and parse a reg name, returns number of chars consumed */
+char *
+DEFUN (parse_reg, (src, mode, reg),
+       char *src AND
+       int *mode AND
+       unsigned int *reg)
+{
+  char *res = 0;
+  char regno;
+
+  if (src[0] == 's' && src[1] == 'p')
+    {
+      if (segmented_mode)
+        {
+          *mode = CLASS_REG_LONG;
+          *reg = 14;
+        }
+      else
+        {
+          *mode = CLASS_REG_WORD;
+          *reg = 15;
+        }
+      return src + 2;
+    }
+  if (src[0] == 'r')
+    {
+      if (src[1] == 'r')
+        {
+          *mode = CLASS_REG_LONG;
+          res = whatreg (reg, src + 2);
+	  regno = *reg;
+	  if (regno > 14)
+          	as_warn (_("register rr%d, out of range."),regno);
+        }
+      else if (src[1] == 'h')
+        {
+          *mode = CLASS_REG_BYTE;
+          res = whatreg (reg, src + 2);
+	  regno = *reg;
+	  if (regno > 7)
+          	as_warn (_("register rh%d, out of range."),regno);
+        }
+      else if (src[1] == 'l')
+        {
+          *mode = CLASS_REG_BYTE;
+          res = whatreg (reg, src + 2);
+	  regno = *reg;
+	  if (regno > 7)
+          	as_warn (_("register rl%d, out of range."),regno);
+          *reg += 8;
+        }
+      else if (src[1] == 'q')
+        {
+          *mode = CLASS_REG_QUAD;
+          res = whatreg (reg, src + 2);
+	  regno = *reg;
+	  if (regno > 12)
+          	as_warn (_("register rq%d, out of range."),regno);
+        }
+      else
+        {
+          *mode = CLASS_REG_WORD;
+          res = whatreg (reg, src + 1);
+	  regno = *reg;
+	  if (regno > 15)
+          	as_warn (_("register r%d, out of range."),regno);
+        }
+    }
+  return res;
+
+}
+
+char *
+DEFUN (parse_exp, (s, op),
+       char *s AND
+       expressionS * op)
+{
+  char *save = input_line_pointer;
+  char *new;
+
+  input_line_pointer = s;
+  expression (op);
+  if (op->X_op == O_absent)
+    as_bad (_("missing operand"));
+  new = input_line_pointer;
+  input_line_pointer = save;
+  return new;
+}
+
+/* The many forms of operand:
+
+   <rb>
+   <r>
+   <rr>
+   <rq>
+   @r
+   #exp
+   exp
+   exp(r)
+   r(#exp)
+   r(r)
+
+
+
+   */
+
+static
+char *
+DEFUN (checkfor, (ptr, what),
+       char *ptr AND
+       char what)
+{
+  if (*ptr == what)
+    ptr++;
+  else
+    {
+      as_bad (_("expected %c"), what);
+    }
+  return ptr;
+}
+
+/* Make sure the mode supplied is the size of a word */
+static void
+DEFUN (regword, (mode, string),
+       int mode AND
+       char *string)
+{
+  int ok;
+
+  ok = CLASS_REG_WORD;
+  if (ok != mode)
+    {
+      as_bad (_("register is wrong size for a word %s"), string);
+    }
+}
+
+/* Make sure the mode supplied is the size of an address */
+static void
+DEFUN (regaddr, (mode, string),
+       int mode AND
+       char *string)
+{
+  int ok;
+
+  ok = segmented_mode ? CLASS_REG_LONG : CLASS_REG_WORD;
+  if (ok != mode)
+    {
+      as_bad (_("register is wrong size for address %s"), string);
+    }
+}
+
+struct ctrl_names
+{
+   int value;
+   char *name;
+};
+
+struct ctrl_names ctrl_table[] =
+{
+   0x2, "fcw",
+   0X3, "refresh",
+   0x4, "psapseg",
+   0x5, "psapoff",
+   0x5, "psap",
+   0x6, "nspseg",
+   0x7, "nspoff",
+   0x7, "nsp",
+   0, 0
+};
+   
+static void
+DEFUN (get_ctrl_operand, (ptr, mode, dst),
+       char **ptr AND
+       struct z8k_op *mode AND
+       unsigned int dst)
+{
+  char *src = *ptr;
+  int r;
+  int i;
+
+  while (*src == ' ')
+    src++;
+
+  mode->mode = CLASS_CTRL;
+  for (i = 0; ctrl_table[i].name; i++)
+    {
+      int j;
+
+      for (j = 0; ctrl_table[i].name[j]; j++)
+        {
+          if (ctrl_table[i].name[j] != src[j])
+            goto fail;
+        }
+      the_ctrl = ctrl_table[i].value;
+      *ptr = src + j;
+      return;
+    fail:;
+    }
+  the_ctrl = 0;
+  return;
+}
+
+struct flag_names
+{
+  int value;
+  char *name;
+
+};
+
+struct flag_names flag_table[] =
+{
+  0x1, "p",
+  0x1, "v",
+  0x2, "s",
+  0x4, "z",
+  0x8, "c",
+  0x0, "+",
+  0, 0
+};
+
+static void
+DEFUN (get_flags_operand, (ptr, mode, dst),
+       char **ptr AND
+       struct z8k_op *mode AND
+       unsigned int dst)
+{
+  char *src = *ptr;
+  int r;
+  int i;
+  int j;
+
+  while (*src == ' ')
+    src++;
+
+  mode->mode = CLASS_FLAGS;
+  the_flags = 0;
+  for (j = 0; j <= 9; j++)
+    {
+     if (!src[j])
+	goto done;
+     for (i = 0; flag_table[i].name; i++)
+        {
+          if (flag_table[i].name[0] == src[j])
+		{
+	        the_flags = the_flags | flag_table[i].value;
+		goto match;
+		}
+        }
+      goto done;
+    match:
+     ;
+    }
+  done:
+  *ptr = src + j;
+  return;
+}
+
+
+struct interrupt_names
+{
+  int value;
+  char *name;
+
+};
+
+struct interrupt_names intr_table[] =
+{
+  0x1, "nvi",
+  0x2, "vi",
+  0x3, "both",
+  0x3, "all",
+  0, 0
+};
+
+static void
+DEFUN (get_interrupt_operand, (ptr, mode, dst),
+       char **ptr AND
+       struct z8k_op *mode AND
+       unsigned int dst)
+{
+  char *src = *ptr;
+  int r;
+  int i;
+
+  while (*src == ' ')
+    src++;
+
+  mode->mode = CLASS_IMM;
+  for (i = 0; intr_table[i].name; i++)
+    {
+      int j;
+
+      for (j = 0; intr_table[i].name[j]; j++)
+        {
+          if (intr_table[i].name[j] != src[j])
+            goto fail;
+        }
+      the_interrupt = intr_table[i].value;
+      *ptr = src + j;
+      return;
+    fail:;
+    }
+  the_interrupt = 0x0;
+  return;
+}
+
+struct cc_names
+{
+  int value;
+  char *name;
+
+};
+
+struct cc_names table[] =
+{
+  0x0, "f",
+  0x1, "lt",
+  0x2, "le",
+  0x3, "ule",
+  0x4, "ov",
+  0x4, "pe",
+  0x5, "mi",
+  0x6, "eq",
+  0x6, "z",
+  0x7, "c",
+  0x7, "ult",
+  0x8, "t",
+  0x9, "ge",
+  0xa, "gt",
+  0xb, "ugt",
+  0xc, "nov",
+  0xc, "po",
+  0xd, "pl",
+  0xe, "ne",
+  0xe, "nz",
+  0xf, "nc",
+  0xf, "uge",
+  0, 0
+};
+
+static void
+DEFUN (get_cc_operand, (ptr, mode, dst),
+       char **ptr AND
+       struct z8k_op *mode AND
+       unsigned int dst)
+{
+  char *src = *ptr;
+  int r;
+  int i;
+
+  while (*src == ' ')
+    src++;
+
+  mode->mode = CLASS_CC;
+  for (i = 0; table[i].name; i++)
+    {
+      int j;
+
+      for (j = 0; table[i].name[j]; j++)
+	{
+	  if (table[i].name[j] != src[j])
+	    goto fail;
+	}
+      the_cc = table[i].value;
+      *ptr = src + j;
+      return;
+    fail:;
+    }
+  the_cc = 0x8;
+}
+
+static void
+get_operand (ptr, mode, dst)
+     char **ptr;
+     struct z8k_op *mode;
+     unsigned int dst;
+{
+  char *src = *ptr;
+  char *end;
+  unsigned int num;
+  unsigned int len;
+  unsigned int size;
+
+  mode->mode = 0;
+
+  while (*src == ' ')
+    src++;
+  if (*src == '#')
+    {
+      mode->mode = CLASS_IMM;
+      imm_operand = &(mode->exp);
+      src = parse_exp (src + 1, &(mode->exp));
+    }
+  else if (*src == '@')
+    {
+      int d;
+
+      mode->mode = CLASS_IR;
+      src = parse_reg (src + 1, &d, &mode->reg);
+    }
+  else
+    {
+      int regn;
+
+      end = parse_reg (src, &mode->mode, &regn);
+
+      if (end)
+	{
+	  int nw, nr;
+
+	  src = end;
+	  if (*src == '(')
+	    {
+	      src++;
+	      end = parse_reg (src, &nw, &nr);
+	      if (end)
+		{
+		  /* Got Ra(Rb) */
+		  src = end;
+
+		  if (*src != ')')
+		    {
+		      as_bad (_("Missing ) in ra(rb)"));
+		    }
+		  else
+		    {
+		      src++;
+		    }
+
+		  regaddr (mode->mode, "ra(rb) ra");
+/*		  regword (mode->mode, "ra(rb) rb");*/
+		  mode->mode = CLASS_BX;
+		  mode->reg = regn;
+		  mode->x_reg = nr;
+		  reg[ARG_RX] = nr;
+		}
+	      else
+		{
+		  /* Got Ra(disp) */
+		  if (*src == '#')
+		    src++;
+		  src = parse_exp (src, &(mode->exp));
+		  src = checkfor (src, ')');
+		  mode->mode = CLASS_BA;
+		  mode->reg = regn;
+		  mode->x_reg = 0;
+		  imm_operand = &(mode->exp);
+		}
+	    }
+	  else
+	    {
+	      mode->reg = regn;
+	      mode->x_reg = 0;
+	    }
+	}
+      else
+	{
+	  /* No initial reg */
+	  src = parse_exp (src, &(mode->exp));
+	  if (*src == '(')
+	    {
+	      src++;
+	      end = parse_reg (src, &(mode->mode), &regn);
+	      regword (mode->mode, "addr(Ra) ra");
+	      mode->mode = CLASS_X;
+	      mode->reg = regn;
+	      mode->x_reg = 0;
+	      da_operand = &(mode->exp);
+	      src = checkfor (end, ')');
+	    }
+	  else
+	    {
+	      /* Just an address */
+	      mode->mode = CLASS_DA;
+	      mode->reg = 0;
+	      mode->x_reg = 0;
+	      da_operand = &(mode->exp);
+	    }
+	}
+    }
+  *ptr = src;
+}
+
+static
+char *
+get_operands (opcode, op_end, operand)
+     opcode_entry_type *opcode;
+     char *op_end;
+     op_type *operand;
+{
+  char *ptr = op_end;
+char *savptr;
+  switch (opcode->noperands)
+    {
+    case 0:
+      operand[0].mode = 0;
+      operand[1].mode = 0;
+      break;
+
+    case 1:
+      ptr++;
+      if (opcode->arg_info[0] == CLASS_CC)
+        {
+          get_cc_operand (&ptr, operand + 0, 0);
+        }
+      else if (opcode->arg_info[0] == CLASS_FLAGS)
+        {
+          get_flags_operand (&ptr, operand + 0, 0);
+        }
+      else if (opcode->arg_info[0] == (CLASS_IMM +(ARG_IMM2)))
+        {
+          get_interrupt_operand (&ptr, operand + 0, 0);
+        }
+      else
+        {
+          get_operand (&ptr, operand + 0, 0);
+        }
+      operand[1].mode = 0;
+      break;
+
+    case 2:
+      ptr++;
+      savptr = ptr;
+      if (opcode->arg_info[0] == CLASS_CC)
+        {
+          get_cc_operand (&ptr, operand + 0, 0);
+        }
+      else if (opcode->arg_info[0] == CLASS_CTRL)
+             {
+               get_ctrl_operand (&ptr, operand + 0, 0);
+               if (the_ctrl == 0)
+                 {
+                   ptr = savptr;
+                   get_operand (&ptr, operand + 0, 0);
+                   if (ptr == 0)
+                     return;
+                   if (*ptr == ',')
+                     ptr++;
+                   get_ctrl_operand (&ptr, operand + 1, 1);
+                   return ptr;
+                 }
+             }
+      else
+        {
+          get_operand (&ptr, operand + 0, 0);
+        }
+      if (ptr == 0)
+        return;
+      if (*ptr == ',')
+        ptr++;
+      get_operand (&ptr, operand + 1, 1);
+      break;
+
+    case 3:
+      ptr++;
+      get_operand (&ptr, operand + 0, 0);
+      if (*ptr == ',')
+	ptr++;
+      get_operand (&ptr, operand + 1, 1);
+      if (*ptr == ',')
+	ptr++;
+      get_operand (&ptr, operand + 2, 2);
+      break;
+
+    case 4:
+      ptr++;
+      get_operand (&ptr, operand + 0, 0);
+      if (*ptr == ',')
+	ptr++;
+      get_operand (&ptr, operand + 1, 1);
+      if (*ptr == ',')
+	ptr++;
+      get_operand (&ptr, operand + 2, 2);
+      if (*ptr == ',')
+	ptr++;
+      get_cc_operand (&ptr, operand + 3, 3);
+      break;
+    default:
+      abort ();
+    }
+
+  return ptr;
+}
+
+/* Passed a pointer to a list of opcodes which use different
+   addressing modes, return the opcode which matches the opcodes
+   provided
+   */
+
+static
+opcode_entry_type *
+DEFUN (get_specific, (opcode, operands),
+       opcode_entry_type * opcode AND
+       op_type * operands)
+
+{
+  opcode_entry_type *this_try = opcode;
+  int found = 0;
+  unsigned int noperands = opcode->noperands;
+
+  unsigned int dispreg;
+  unsigned int this_index = opcode->idx;
+
+  while (this_index == opcode->idx && !found)
+    {
+      unsigned int i;
+
+      this_try = opcode++;
+      for (i = 0; i < noperands; i++)
+	{
+	  int mode = operands[i].mode;
+
+	  if ((mode & CLASS_MASK) != (this_try->arg_info[i] & CLASS_MASK))
+	    {
+	      /* it could be an pc rel operand, if this is a da mode and
+	   we like disps, then insert it */
+
+	      if (mode == CLASS_DA && this_try->arg_info[i] == CLASS_DISP)
+		{
+		  /* This is the case */
+		  operands[i].mode = CLASS_DISP;
+		}
+	      else if (mode == CLASS_BA && this_try->arg_info[i])
+		{
+		  /* Can't think of a way to turn what we've been given into
+	     something that's ok */
+		  goto fail;
+		}
+	      else if (this_try->arg_info[i] & CLASS_PR)
+		{
+		  if (mode == CLASS_REG_LONG && segmented_mode)
+		    {
+		      /* ok */
+		    }
+		  else if (mode == CLASS_REG_WORD && !segmented_mode)
+		    {
+		      /* ok */
+		    }
+		  else
+		    goto fail;
+		}
+	      else
+		goto fail;
+	    }
+	  switch (mode & CLASS_MASK)
+	    {
+	    default:
+	      break;
+	    case CLASS_X:
+	    case CLASS_IR:
+	    case CLASS_BA:
+	    case CLASS_BX:
+	    case CLASS_DISP:
+	    case CLASS_REG:
+	    case CLASS_REG_WORD:
+	    case CLASS_REG_BYTE:
+	    case CLASS_REG_QUAD:
+	    case CLASS_REG_LONG:
+	    case CLASS_REGN0:
+	      reg[this_try->arg_info[i] & ARG_MASK] = operands[i].reg;
+	      break;
+	    }
+	}
+
+      found = 1;
+    fail:;
+    }
+  if (found)
+    return this_try;
+  else
+    return 0;
+}
+
+static void
+DEFUN (check_operand, (operand, width, string),
+       struct z8k_op *operand AND
+       unsigned int width AND
+       char *string)
+{
+  if (operand->exp.X_add_symbol == 0
+      && operand->exp.X_op_symbol == 0)
+    {
+
+      /* No symbol involved, let's look at offset, it's dangerous if any of
+       the high bits are not 0 or ff's, find out by oring or anding with
+       the width and seeing if the answer is 0 or all fs*/
+      if ((operand->exp.X_add_number & ~width) != 0 &&
+	  (operand->exp.X_add_number | width) != (~0))
+	{
+	  as_warn (_("operand %s0x%x out of range."), string, operand->exp.X_add_number);
+	}
+    }
+
+}
+
+static char buffer[20];
+
+static void
+DEFUN (newfix, (ptr, type, operand),
+       int ptr AND
+       int type AND
+       expressionS * operand)
+{
+  if (operand->X_add_symbol
+      || operand->X_op_symbol
+      || operand->X_add_number)
+    {
+      fix_new_exp (frag_now,
+		   ptr,
+		   1,
+		   operand,
+		   0,
+		   type);
+    }
+}
+
+static char *
+DEFUN (apply_fix, (ptr, type, operand, size),
+       char *ptr AND
+       int type AND
+       expressionS * operand AND
+       int size)
+{
+  int n = operand->X_add_number;
+
+  operand->X_add_number = n;
+  newfix ((ptr - buffer) / 2, type, operand);
+#if 1
+  switch (size)
+    {
+    case 8:			/* 8 nibbles == 32 bits */
+      *ptr++ = n >> 28;
+      *ptr++ = n >> 24;
+      *ptr++ = n >> 20;
+      *ptr++ = n >> 16;
+    case 4:			/* 4 niblles == 16 bits */
+      *ptr++ = n >> 12;
+      *ptr++ = n >> 8;
+    case 2:
+      *ptr++ = n >> 4;
+    case 1:
+      *ptr++ = n >> 0;
+      break;
+    }
+#endif
+  return ptr;
+
+}
+
+/* Now we know what sort of opcodes it is, lets build the bytes -
+ */
+#define INSERT(x,y) *x++ = y>>24; *x++ = y>> 16; *x++=y>>8; *x++ =y;
+static void
+build_bytes (this_try, operand)
+     opcode_entry_type * this_try;
+     struct z8k_op *operand;
+{
+  unsigned int i;
+
+  int length;
+  char *output;
+  char *output_ptr = buffer;
+  char part;
+  int c;
+  char high;
+  int nib;
+  int nibble;
+  unsigned int *class_ptr;
+
+  frag_wane (frag_now);
+  frag_new (0);
+
+  memset (buffer, 20, 0);
+  class_ptr = this_try->byte_info;
+top:;
+
+  for (nibble = 0; c = *class_ptr++; nibble++)
+    {
+
+      switch (c & CLASS_MASK)
+	{
+	default:
+
+	  abort ();
+	case CLASS_ADDRESS:
+	  /* Direct address, we don't cope with the SS mode right now */
+	  if (segmented_mode)
+	    {
+	      da_operand->X_add_number |= 0x80000000;
+	      output_ptr = apply_fix (output_ptr, R_IMM32, da_operand, 8);
+	    }
+	  else
+	    {
+	      output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
+	    }
+	  da_operand = 0;
+	  break;
+	case CLASS_DISP8:
+	  /* pc rel 8 bit */
+	  output_ptr = apply_fix (output_ptr, R_JR, da_operand, 2);
+	  da_operand = 0;
+	  break;
+
+	case CLASS_0DISP7:
+	  /* pc rel 7 bit */
+	  *output_ptr = 0;
+	  output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
+	  da_operand = 0;
+	  break;
+
+	case CLASS_1DISP7:
+	  /* pc rel 7 bit */
+	  *output_ptr = 0x80;
+	  output_ptr = apply_fix (output_ptr, R_DISP7, da_operand, 2);
+          output_ptr[-2] =  0x8;
+	  da_operand = 0;
+	  break;
+
+	case CLASS_BIT_1OR2:
+	  *output_ptr = c & 0xf;
+	  if (imm_operand)
+	    {
+	      if (imm_operand->X_add_number == 2)
+		{
+		  *output_ptr |= 2;
+		}
+	      else if (imm_operand->X_add_number != 1)
+		{
+		  as_bad (_("immediate must be 1 or 2"));
+		}
+	    }
+	  else
+	    {
+	      as_bad (_("immediate 1 or 2 expected"));
+	    }
+	  output_ptr++;
+	  break;
+	case CLASS_CC:
+	  *output_ptr++ = the_cc;
+	  break;
+        case CLASS_0CCC:
+          *output_ptr++ = the_ctrl;
+          break;
+        case CLASS_1CCC:
+          *output_ptr++ = the_ctrl | 0x8;
+          break;
+        case CLASS_00II:
+          *output_ptr++ = (~the_interrupt & 0x3);
+          break;
+        case CLASS_01II:
+          *output_ptr++ = (~the_interrupt & 0x3) | 0x4;
+          break;
+        case CLASS_FLAGS:
+          *output_ptr++ = the_flags;
+          break;
+	case CLASS_BIT:
+	  *output_ptr++ = c & 0xf;
+	  break;
+	case CLASS_REGN0:
+	  if (reg[c & 0xf] == 0)
+	    {
+	      as_bad (_("can't use R0 here"));
+	    }
+	case CLASS_REG:
+	case CLASS_REG_BYTE:
+	case CLASS_REG_WORD:
+	case CLASS_REG_LONG:
+	case CLASS_REG_QUAD:
+	  /* Insert bit mattern of
+	 right reg */
+	  *output_ptr++ = reg[c & 0xf];
+	  break;
+	case CLASS_DISP:
+	  output_ptr = apply_fix (output_ptr, R_IMM16, da_operand, 4);
+	  da_operand = 0;
+	  break;
+
+	case CLASS_IMM:
+	  {
+	    nib = 0;
+	    switch (c & ARG_MASK)
+	      {
+	      case ARG_IMM4:
+		output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
+		break;
+	      case ARG_IMM4M1:
+		imm_operand->X_add_number--;
+		output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
+		break;
+	      case ARG_IMMNMINUS1:
+		imm_operand->X_add_number--;
+		output_ptr = apply_fix (output_ptr, R_IMM4L, imm_operand, 1);
+		break;
+	      case ARG_NIM8:
+		imm_operand->X_add_number = -imm_operand->X_add_number;
+	      case ARG_IMM8:
+		output_ptr = apply_fix (output_ptr, R_IMM8, imm_operand, 2);
+		break;
+	      case ARG_IMM16:
+		output_ptr = apply_fix (output_ptr, R_IMM16, imm_operand, 4);
+		break;
+
+	      case ARG_IMM32:
+		output_ptr = apply_fix (output_ptr, R_IMM32, imm_operand, 8);
+		break;
+
+	      default:
+		abort ();
+	      }
+	  }
+	}
+    }
+
+  /* Copy from the nibble buffer into the frag */
+
+  {
+    int length = (output_ptr - buffer) / 2;
+    char *src = buffer;
+    char *fragp = frag_more (length);
+
+    while (src < output_ptr)
+      {
+	*fragp = (src[0] << 4) | src[1];
+	src += 2;
+	fragp++;
+      }
+
+  }
+
+}
+
+/* This is the guts of the machine-dependent assembler.  STR points to a
+   machine dependent instruction.  This funciton is supposed to emit
+   the frags/bytes it assembles to.
+   */
+
+void
+DEFUN (md_assemble, (str),
+       char *str)
+{
+  char *op_start;
+  char *op_end;
+  unsigned int i;
+  struct z8k_op operand[3];
+  opcode_entry_type *opcode;
+  opcode_entry_type *prev_opcode;
+
+  char *dot = 0;
+  char c;
+
+  /* Drop leading whitespace */
+  while (*str == ' ')
+    str++;
+
+  /* find the op code end */
+  for (op_start = op_end = str;
+       *op_end != 0 && *op_end != ' ';
+       op_end++)
+    {
+    }
+
+  ;
+
+  if (op_end == op_start)
+    {
+      as_bad (_("can't find opcode "));
+    }
+  c = *op_end;
+
+  *op_end = 0;
+
+  opcode = (opcode_entry_type *) hash_find (opcode_hash_control,
+					    op_start);
+
+
+  if (opcode == NULL)
+    {
+      as_bad (_("unknown opcode"));
+      return;
+    }
+
+  if (opcode->opcode == 250)
+    {
+      /* was really a pseudo op */
+
+      pseudo_typeS *p;
+      char oc;
+
+      char *old = input_line_pointer;
+      *op_end = c;
+
+
+      input_line_pointer = op_end;
+
+      oc = *old;
+      *old = '\n';
+      while (*input_line_pointer == ' ')
+	input_line_pointer++;
+      p = (pseudo_typeS *) (opcode->func);
+
+      (p->poc_handler) (p->poc_val);
+      input_line_pointer = old;
+      *old = oc;
+    }
+  else
+    {
+      input_line_pointer = get_operands (opcode, op_end,
+					 operand);
+      prev_opcode = opcode;
+
+      opcode = get_specific (opcode, operand);
+
+      if (opcode == 0)
+	{
+	  /* Couldn't find an opcode which matched the operands */
+	  char *where = frag_more (2);
+
+	  where[0] = 0x0;
+	  where[1] = 0x0;
+
+	  as_bad (_("Can't find opcode to match operands"));
+	  return;
+	}
+
+      build_bytes (opcode, operand);
+    }
+}
+
+void
+DEFUN (tc_crawl_symbol_chain, (headers),
+       object_headers * headers)
+{
+  printf (_("call to tc_crawl_symbol_chain \n"));
+}
+
+symbolS *
+DEFUN (md_undefined_symbol, (name),
+       char *name)
+{
+  return 0;
+}
+
+void
+DEFUN (tc_headers_hook, (headers),
+       object_headers * headers)
+{
+  printf (_("call to tc_headers_hook \n"));
+}
+
+/* Various routines to kill one day */
+/* Equal to MAX_PRECISION in atof-ieee.c */
+#define MAX_LITTLENUMS 6
+
+/* Turn a string in input_line_pointer into a floating point constant of type
+   type, and store the appropriate bytes in *litP.  The number of LITTLENUMS
+   emitted is stored in *sizeP .  An error message is returned, or NULL on OK.
+   */
+char *
+md_atof (type, litP, sizeP)
+     char type;
+     char *litP;
+     int *sizeP;
+{
+  int prec;
+  LITTLENUM_TYPE words[MAX_LITTLENUMS];
+  LITTLENUM_TYPE *wordP;
+  char *t;
+  char *atof_ieee ();
+
+  switch (type)
+    {
+    case 'f':
+    case 'F':
+    case 's':
+    case 'S':
+      prec = 2;
+      break;
+
+    case 'd':
+    case 'D':
+    case 'r':
+    case 'R':
+      prec = 4;
+      break;
+
+    case 'x':
+    case 'X':
+      prec = 6;
+      break;
+
+    case 'p':
+    case 'P':
+      prec = 6;
+      break;
+
+    default:
+      *sizeP = 0;
+      return _("Bad call to MD_ATOF()");
+    }
+  t = atof_ieee (input_line_pointer, type, words);
+  if (t)
+    input_line_pointer = t;
+
+  *sizeP = prec * sizeof (LITTLENUM_TYPE);
+  for (wordP = words; prec--;)
+    {
+      md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE));
+      litP += sizeof (LITTLENUM_TYPE);
+    }
+  return 0;
+}
+
+CONST char *md_shortopts = "z:";
+struct option md_longopts[] = {
+  {NULL, no_argument, NULL, 0}
+};
+size_t md_longopts_size = sizeof(md_longopts);
+
+int
+md_parse_option (c, arg)
+     int c;
+     char *arg;
+{
+  switch (c)
+    {
+    case 'z':
+      if (!strcmp (arg, "8001"))
+	s_segm ();
+      else if (!strcmp (arg, "8002"))
+	s_unseg ();
+      else
+	{
+	  as_bad (_("invalid architecture -z%s"), arg);
+	  return 0;
+	}
+      break;
+
+    default:
+      return 0;
+    }
+
+  return 1;
+}
+
+void
+md_show_usage (stream)
+     FILE *stream;
+{
+  fprintf(stream, _("\
+Z8K options:\n\
+-z8001			generate segmented code\n\
+-z8002			generate unsegmented code\n"));
+}
+
+void
+tc_aout_fix_to_chars ()
+{
+  printf (_("call to tc_aout_fix_to_chars \n"));
+  abort ();
+}
+
+void
+md_convert_frag (headers, seg, fragP)
+     object_headers *headers;
+     segT seg;
+     fragS *fragP;
+{
+  printf (_("call to md_convert_frag \n"));
+  abort ();
+}
+
+valueT
+DEFUN (md_section_align, (seg, size),
+       segT seg AND
+       valueT size)
+{
+  return ((size + (1 << section_alignment[(int) seg]) - 1) & (-1 << section_alignment[(int) seg]));
+
+}
+
+void
+md_apply_fix (fixP, val)
+     fixS *fixP;
+     long val;
+{
+  char *buf = fixP->fx_where + fixP->fx_frag->fr_literal;
+
+  switch (fixP->fx_r_type)
+    {
+    case R_IMM4L:
+      buf[0] = (buf[0] & 0xf0) | ((buf[0] + val) & 0xf);
+      break;
+
+    case R_JR:
+
+      *buf++ = val;
+      /*    if (val != 0) abort();*/
+      break;
+
+    case R_DISP7:
+
+      *buf++ += val;
+      /*    if (val != 0) abort();*/
+      break;
+
+    case R_IMM8:
+      buf[0] += val;
+      break;
+    case R_IMM16:
+      *buf++ = (val >> 8);
+      *buf++ = val;
+      break;
+    case R_IMM32:
+      *buf++ = (val >> 24);
+      *buf++ = (val >> 16);
+      *buf++ = (val >> 8);
+      *buf++ = val;
+      break;
+#if 0
+    case R_DA | R_SEG:
+      *buf++ = (val >> 16);
+      *buf++ = 0x00;
+      *buf++ = (val >> 8);
+      *buf++ = val;
+      break;
+#endif
+
+    case 0:
+      md_number_to_chars (buf, val, fixP->fx_size);
+      break;
+
+    default:
+      abort ();
+
+    }
+}
+
+int
+md_estimate_size_before_relax (fragP, segment_type)
+     register fragS *fragP;
+     register segT segment_type;
+{
+  printf (_("call tomd_estimate_size_before_relax \n"));
+  abort ();
+}
+
+/* Put number into target byte order */
+
+void
+DEFUN (md_number_to_chars, (ptr, use, nbytes),
+       char *ptr AND
+       valueT use AND
+       int nbytes)
+{
+  number_to_chars_bigendian (ptr, use, nbytes);
+}
+long
+md_pcrel_from (fixP)
+     fixS *fixP;
+{
+  abort ();
+}
+
+void
+tc_coff_symbol_emit_hook (s)
+     struct symbol *s;
+{
+}
+
+void
+tc_reloc_mangle (fix_ptr, intr, base)
+     fixS *fix_ptr;
+     struct internal_reloc *intr;
+     bfd_vma base;
+
+{
+  symbolS *symbol_ptr;
+
+  if (fix_ptr->fx_addsy &&
+      fix_ptr->fx_subsy) 
+    {
+      symbolS *add = fix_ptr->fx_addsy;
+      symbolS *sub = fix_ptr->fx_subsy;
+      if (S_GET_SEGMENT(add) != S_GET_SEGMENT(sub))
+	{
+	  as_bad(_("Can't subtract symbols in different sections %s %s"),
+		 S_GET_NAME(add), S_GET_NAME(sub));
+	}
+      else {
+	int diff = S_GET_VALUE(add) - S_GET_VALUE(sub);
+	fix_ptr->fx_addsy = 0;
+	fix_ptr->fx_subsy = 0;
+	fix_ptr->fx_offset += diff;
+      }
+    }
+  symbol_ptr = fix_ptr->fx_addsy;
+
+  /* If this relocation is attached to a symbol then it's ok
+     to output it */
+  if (fix_ptr->fx_r_type == 0)
+    {
+      /* cons likes to create reloc32's whatever the size of the reloc.. */
+      switch (fix_ptr->fx_size)
+	{
+	case 2:
+	  intr->r_type = R_IMM16;
+	  break;
+	case 1:
+	  intr->r_type = R_IMM8;
+	  break;
+	case 4:
+	  intr->r_type = R_IMM32;
+	  break;
+	default:
+	  abort ();
+	}
+
+    }
+  else
+    {
+      intr->r_type = fix_ptr->fx_r_type;
+    }
+
+  intr->r_vaddr = fix_ptr->fx_frag->fr_address + fix_ptr->fx_where + base;
+  intr->r_offset = fix_ptr->fx_offset;
+
+  if (symbol_ptr)
+    intr->r_symndx = symbol_ptr->sy_number;
+  else
+    intr->r_symndx = -1;
+}
+