* config/tc-w65.c, config/tc-w65.h, config/w65.mt: Newfiles.

	* config/obj-coff.h: Cope with w65.
	* configure, configure.in: Recognize w65.

3 files changed, 1299 insertions, 0 deletions

diff --git a/gas/config/tc-w65.c b/gas/config/tc-w65.c
new file mode 100644
index 0000000..b700ead
--- /dev/null
+++ b/gas/config/tc-w65.c
@@ -0,0 +1,1250 @@
+/* tc-w65.c -- Assemble code for the W65816
+
+   Copyright (C) 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/*
+   Written By Steve Chamberlain
+   sac@cygnus.com
+ */
+
+#include <stdio.h>
+#include "as.h"
+#include "bfd.h"
+#include "subsegs.h"
+#define DEFINE_TABLE
+#include "../opcodes/w65-opc.h"
+#include <ctype.h>
+
+const char comment_chars[] = "!";
+CONST char line_separator_chars[] = ";";
+const char line_comment_chars[] = "!#";
+
+/* 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
+ */
+
+#define OP_BCC	0x90
+#define OP_BCS	0xB0
+#define OP_BEQ	0xF0
+#define OP_BMI	0x30
+#define OP_BNE	0xD0
+#define OP_BPL	0x10
+#define OP_BRA	0x80
+#define OP_BRL	0x82
+#define OP_BVC	0x50
+#define OP_BVS	0x70
+
+void s_longa ();
+const pseudo_typeS md_pseudo_table[] =
+{
+  {"int", cons, 2},
+  {"word", cons, 2},
+  {"longa", s_longa, 0},
+  {"longi", s_longa, 1},
+  {0, 0, 0}
+};
+
+
+void cons ();
+void s_align_bytes ();
+
+
+/*int md_reloc_size; */
+
+static int relax;		/* set if -relax seen */
+
+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 */
+
+int M;				/* M flag */
+int X;				/* X flag */
+
+
+
+
+#define C(a,b) ENCODE_RELAX(a,b)
+#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
+
+#define GET_WHAT(x) ((x>>2))
+
+#define BYTE_DISP 1
+#define WORD_DISP 2
+#define UNDEF_BYTE_DISP 0
+#define UNDEF_WORD_DISP 3
+
+#define COND_BRANCH 	1
+#define UNCOND_BRANCH   2
+#define END 	3
+
+#define BYTE_F 127		/* How far we can branch forwards */
+#define BYTE_B -126		/* How far we can branch backwards */
+#define WORD_F 32767
+#define WORD_B 32768
+
+const relax_typeS md_relax_table[C (END, 0)];
+
+/*
+   This function is called once, at assembler startup time.  This should
+   set up all the tables, etc that the MD part of the assembler needs
+ */
+
+
+void
+s_longa (xmode)
+{
+  int *p = xmode ? &X : &M;
+  while (*input_line_pointer == ' ')
+    input_line_pointer++;
+  if (strncmp (input_line_pointer, "on", 2) == 0)
+    {
+      input_line_pointer += 2;
+      *p = 0;
+    }
+  else if (strncmp (input_line_pointer, "off", 3) == 0)
+    {
+      *p = 1;
+      input_line_pointer += 3;
+    }
+  else
+    as_bad ("need on or off.");
+  demand_empty_rest_of_line ();
+}
+void
+md_begin ()
+{
+  relax_typeS *table;
+  struct opinfo *opcode;
+  char *prev_name = "";
+
+  opcode_hash_control = hash_new ();
+
+  /* Insert unique names into hash table */
+  for (opcode = optable; opcode->name; opcode++)
+    {
+      if (strcmp (prev_name, opcode->name))
+	{
+	  prev_name = opcode->name;
+	  hash_insert (opcode_hash_control, opcode->name, (char *) opcode);
+	}
+      else
+	{
+	  /* Make all the opcodes with the same name point to the same
+	     string */
+	  opcode->name = prev_name;
+	}
+    }
+
+
+  /* Initialize the relax table.  We use a local variable to avoid
+     warnings about modifying a supposedly const data structure.  */
+  table = (relax_typeS *) md_relax_table;
+  table[C (COND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
+  table[C (COND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
+  table[C (COND_BRANCH, BYTE_DISP)].rlx_length = 2;
+  table[C (COND_BRANCH, BYTE_DISP)].rlx_more = C (COND_BRANCH, WORD_DISP);
+
+  table[C (COND_BRANCH, WORD_DISP)].rlx_forward = WORD_F;
+  table[C (COND_BRANCH, WORD_DISP)].rlx_backward = WORD_B;
+  table[C (COND_BRANCH, WORD_DISP)].rlx_length = 5;
+  table[C (COND_BRANCH, WORD_DISP)].rlx_more = 0;
+
+  table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_forward = BYTE_F;
+  table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_backward = BYTE_B;
+  table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_length = 2;
+  table[C (UNCOND_BRANCH, BYTE_DISP)].rlx_more = C (UNCOND_BRANCH, WORD_DISP);
+
+  table[C (UNCOND_BRANCH, WORD_DISP)].rlx_forward = WORD_F;
+  table[C (UNCOND_BRANCH, WORD_DISP)].rlx_backward = WORD_B;
+  table[C (UNCOND_BRANCH, WORD_DISP)].rlx_length = 3;
+  table[C (UNCOND_BRANCH, WORD_DISP)].rlx_more = 0;
+
+  flag_signed_overflow_ok = 1;
+}
+
+static expressionS immediate;	/* absolute expression */
+static expressionS immediate1;	/* absolute expression */
+
+
+static symbolS *
+dot ()
+{
+  const char *fake;
+
+  /* JF: '.' is pseudo symbol with value of current location
+     in current segment.  */
+  fake = FAKE_LABEL_NAME;
+  return symbol_new (fake,
+		     now_seg,
+		     (valueT) frag_now_fix (),
+		     frag_now);
+
+}
+
+int expr_size;
+int expr_shift;
+int tc_cons_reloc;
+void
+w65_expression (dest, bytes)
+     expressionS *dest;
+     unsigned int bytes;
+{
+  expr_size = 0;
+  expr_shift = 0;
+  tc_cons_reloc = 0;
+  while (*input_line_pointer == ' ')
+    input_line_pointer++;
+
+  if (*input_line_pointer == '<')
+    {
+      expr_size = 1;
+      input_line_pointer++;
+    }
+  else if (*input_line_pointer == '>')
+    {
+      expr_shift = 1;
+      input_line_pointer++;
+    }
+  else if (*input_line_pointer == '^')
+    {
+      expr_shift = 2;
+      input_line_pointer++;
+    }
+
+  expr (0, dest);
+}
+
+int amode;
+static
+char *
+parse_exp (s, bytes)
+     char *s;
+     int bytes;
+{
+  char *save;
+  char *new;
+
+  save = input_line_pointer;
+  input_line_pointer = s;
+  w65_expression (&immediate, bytes);
+  if (immediate.X_op == O_absent)
+    as_bad ("missing operand");
+  new = input_line_pointer;
+  input_line_pointer = save;
+  return new;
+}
+
+
+static
+char *
+get_operands (info, ptr)
+     struct opinfo *info;
+     char *ptr;
+{
+  register int override_len = 0;
+  register int bytes = 0;
+  while (*ptr == ' ')
+    ptr++;
+
+  if (ptr[0] == '#')
+    {
+      ptr++;
+      switch (info->amode)
+	{
+	case ADDR_IMMTOI:
+	  bytes = X ? 1 : 2;
+	  amode = ADDR_IMMTOI;
+	  break;
+	case ADDR_IMMTOA:
+	  bytes = M ? 1 : 2;
+	  amode = ADDR_IMMTOA;
+	  break;
+	case ADDR_IMMCOP:
+	  bytes = 1;
+	  amode = ADDR_IMMCOP;
+	  break;
+	case ADDR_DIR:
+	  bytes = 2;
+	  amode = ADDR_ABS;
+	  break;
+	default:
+	  abort ();
+	  break;
+	}
+      ptr = parse_exp (ptr);
+    }
+  else if (ptr[0] == '!')
+    {
+      ptr = parse_exp (ptr + 1);
+      if (ptr[0] == ',')
+	{
+	  if (ptr[1] == 'y')
+	    {
+	      amode = ADDR_ABS_IDX_Y;
+	      bytes = 2;
+	      ptr += 2;
+	    }
+	  else if (ptr[1] == 'x')
+	    {
+	      amode = ADDR_ABS_IDX_X;
+	      bytes = 2;
+	      ptr += 2;
+	    }
+	  else
+	    {
+	      as_bad ("syntax error after <exp");
+	    }
+	}
+      else
+	{
+	  amode = ADDR_ABS;
+	  bytes = 2;
+	}
+    }
+  else if (ptr[0] == '>')
+    {
+      ptr = parse_exp (ptr + 1);
+      if (ptr[0] == ',' && ptr[1] == 'x')
+	{
+	  amode = ADDR_ABS_LONG_IDX_X;
+	  bytes = 3;
+	  ptr += 2;
+	}
+      else
+	{
+	  amode = ADDR_ABS_LONG;
+	  bytes = 3;
+	}
+    }
+  else if (ptr[0] == '<')
+    {
+      ptr = parse_exp (ptr + 1);
+      if (ptr[0] == ',')
+	{
+	  if (ptr[1] == 'y')
+	    {
+	      amode = ADDR_DIR_IDX_Y;
+	      ptr += 2;
+	      bytes = 2;
+	    }
+	  else if (ptr[1] == 'x')
+	    {
+	      amode = ADDR_DIR_IDX_X;
+	      ptr += 2;
+	      bytes = 2;
+	    }
+	  else
+	    {
+	      as_bad ("syntax error after <exp");
+	    }
+	}
+      else
+	{
+	  amode = ADDR_DIR;
+	  bytes = 1;
+	}
+    }
+  else if (ptr[0] == 'a')
+    {
+      amode = ADDR_ACC;
+    }
+  else if (ptr[0] == '(')
+    {
+      /* Look for (exp),y
+	 (<exp),y
+	 (exp,x)
+	 (<exp,x)
+	 (exp)
+	 (!exp)
+	 (exp)
+	 (<exp)
+	 (exp,x)
+	 (!exp,x)
+	 (exp,s)
+	 (exp,s),y */
+
+      ptr++;
+      if (ptr[0] == '<')
+	{
+	  override_len = 1;
+	  ptr++;
+	}
+      else if (ptr[0] == '!')
+	{
+	  override_len = 2;
+	  ptr++;
+	}
+      else if (ptr[0] == '>')
+	{
+	  override_len = 3;
+	  ptr++;
+	}
+      else
+	{
+	  override_len = 0;
+	}
+      ptr = parse_exp (ptr);
+
+      if (ptr[0] == ',')
+	{
+	  ptr++;
+	  if (ptr[0] == 'x' && ptr[1] == ')')
+	    {
+	      ptr += 2;
+
+	      if (override_len == 1)
+		{
+		  amode = ADDR_DIR_IDX_IND_X;
+		  bytes = 2;
+		}
+	      else
+		{
+		  amode = ADDR_ABS_IND_IDX;
+		  bytes = 2;
+		}
+	    }
+	  else if (ptr[0] == 's' && ptr[1] == ')' && ptr[2] == ',' && ptr[3] == 'y')
+	    {
+	      amode = ADDR_STACK_REL_INDX_IDX;
+	      bytes = 1;
+	      ptr += 4;
+	    }
+	}
+      else if (ptr[0] == ')')
+	{
+	  if (ptr[1] == ',' && ptr[2] == 'y')
+	    {
+	      amode = ADDR_DIR_IND_IDX_Y;
+	      ptr += 3;
+	      bytes = 2;
+	    }
+	  else
+	    {
+	      if (override_len == 1)
+		{
+		  amode = ADDR_DIR_IND;
+		  bytes = 1;
+		}
+	      else
+		{
+		  amode = ADDR_ABS_IND;
+		  bytes = 2;
+		}
+	      ptr++;
+
+	    }
+	}
+
+    }
+  else if (ptr[0] == '[')
+    {
+      ptr = parse_exp (ptr + 1);
+      if (ptr[0] == ']')
+	{
+	  ptr++;
+	  if (ptr[0] == ',' && ptr[1] == 'y')
+	    {
+	      bytes = 1;
+	      amode = ADDR_DIR_IND_IDX_Y_LONG;
+	      ptr += 2;
+	    }
+	  else
+	    {
+	      if (info->code == O_jmp) 
+		{
+		bytes = 2;
+		amode = ADDR_ABS_IND_LONG;
+	      } 
+	      else 
+{
+		bytes = 1;
+	      
+		amode = ADDR_DIR_IND_LONG;
+	      }
+	    }
+	}
+    }
+  else
+    {
+      ptr = parse_exp (ptr, 2);
+      if (ptr[0] == ',')
+	{
+	  if (ptr[1] == 'y')
+	    {
+	      if (override_len == 1)
+		{
+		  bytes = 1;
+		  amode = ADDR_DIR_IDX_Y;
+		}
+	      else
+		{
+		  amode = ADDR_ABS_IDX_Y;
+		  bytes = 2;
+		}
+	      ptr += 2;
+	    }
+	  else if (ptr[1] == 'x')
+	    {
+	      if (override_len == 1)
+		{
+		  amode = ADDR_DIR_IDX_X;
+		  bytes = 1;
+		}
+	      else
+		{
+		  amode = ADDR_ABS_IDX_X;
+		  bytes = 2;
+		}
+	      ptr += 2;
+	    }
+	  else if (ptr[1] == 's')
+	    {
+	      bytes = 1;
+	      amode = ADDR_STACK_REL;
+	      ptr += 2;
+	    }
+	  else
+	    {
+	      bytes = 1;
+	      immediate1 = immediate;
+	      ptr = parse_exp (ptr + 1);
+	      amode = ADDR_BLOCK_MOVE;
+	    }
+	}
+      else
+	{
+	  switch (info->amode)
+	    {
+	    case ADDR_PC_REL:
+	      amode = ADDR_PC_REL;
+	      bytes = 1;
+	      break;
+	    case ADDR_PC_REL_LONG:
+	      amode = ADDR_PC_REL_LONG;
+	      bytes = 2;
+	      break;
+	    default:
+	      if (override_len == 1)
+		{
+		  amode = ADDR_DIR;
+		  bytes = 1;
+		}
+	      else if (override_len == 3)
+		{
+		  bytes = 3;
+		  amode = ADDR_ABS_LONG;
+		}
+	      else
+		{
+		  amode = ADDR_ABS;
+		  bytes = 2;
+		}
+	    }
+	}
+    }
+
+  switch (bytes)
+    {
+    case 1:
+      switch (expr_shift)
+	{
+	case 0:
+	  if (amode == ADDR_DIR)
+	tc_cons_reloc = R_W65_DP;
+	  else
+tc_cons_reloc = R_W65_ABS8;
+	  break;
+	case 1:
+	  tc_cons_reloc = R_W65_ABS8S8;
+	  break;
+	case 2:
+	  tc_cons_reloc = R_W65_ABS8S16;
+	  break;
+	}
+      break;
+    case 2:
+      switch (expr_shift)
+	{
+	case 0:
+	  tc_cons_reloc = R_W65_ABS16;
+	  break;
+	case 1:
+	  tc_cons_reloc = R_W65_ABS16S8;
+	  break;
+	case 2:
+	  tc_cons_reloc = R_W65_ABS16S16;
+	  break;
+	}
+    }
+  return ptr;
+}
+
+/* Passed a pointer to a list of opcodes which use different
+   addressing modes, return the opcode which matches the opcodes
+   provided
+ */
+
+static
+struct opinfo *
+get_specific (opcode)
+     struct opinfo *opcode;
+{
+  int ocode = opcode->code;
+
+  for (; opcode->code == ocode; opcode++)
+    {
+      if (opcode->amode == amode)
+	return opcode;
+    }
+  return 0;
+}
+
+int
+check (operand, low, high)
+     expressionS *operand;
+     int low;
+     int high;
+{
+  if (operand->X_op != O_constant
+      || operand->X_add_number < low
+      || operand->X_add_number > high)
+    {
+      as_bad ("operand must be absolute in range %d..%d", low, high);
+    }
+  return operand->X_add_number;
+}
+
+
+static int log2[] =
+{0, 0, 1, 0, 2};
+
+/* Now we know what sort of opcodes it is, lets build the bytes -
+ */
+static void
+build_Mytes (opcode)
+     struct opinfo *opcode;
+{
+  int size;
+  int type;
+  int pcrel;
+  char *output;
+
+  if (opcode->amode == ADDR_IMPLIED)
+    {
+      output = frag_more (1);
+    }
+  else if (opcode->amode == ADDR_PC_REL)
+    {
+      int type;
+      /* This is a relaxable insn, so we do some special handling */
+      type = opcode->val == OP_BRA ? UNCOND_BRANCH : COND_BRANCH;
+      output = frag_var (rs_machine_dependent,
+			 md_relax_table[C (type, WORD_DISP)].rlx_length,
+			 md_relax_table[C (type, BYTE_DISP)].rlx_length,
+			 C (type, UNDEF_BYTE_DISP),
+			 immediate.X_add_symbol,
+			 immediate.X_add_number,
+			 0);
+    }
+  else
+    {
+      switch (opcode->amode)
+	{
+	  GETINFO (size, type, pcrel);
+	}
+
+      /* If something special was done in the
+	 expression modify the reloc type */
+      if (tc_cons_reloc)
+	{
+	  type = tc_cons_reloc;
+	}
+
+
+
+      /* 1 byte for the opcode + the bytes for the addrmode */
+      output = frag_more (size + 1);
+
+      if (opcode->amode == ADDR_BLOCK_MOVE)
+	{
+	  /* Two relocs for this one */
+	  fix_new_exp (frag_now,
+		       output + 1 - frag_now->fr_literal,
+		       1,
+		       &immediate,
+		       0,
+		       R_W65_ABS8S16);
+
+	  fix_new_exp (frag_now,
+		       output + 2 - frag_now->fr_literal,
+		       1,
+		       &immediate1,
+		       0,
+		       R_W65_ABS8S16);
+	}
+      else if (type >= 0
+	       && opcode->amode != ADDR_IMPLIED
+	       && opcode->amode != ADDR_ACC
+	       && opcode->amode != ADDR_STACK)
+	{
+	  fix_new_exp (frag_now,
+		       output + 1 - frag_now->fr_literal,
+		       size,
+		       &immediate,
+		       pcrel,
+		       type);
+	}
+    }
+  output[0] = opcode->val;
+}
+
+/* This is the guts of the machine-dependent assembler.  STR points to a
+   machine dependent instruction.  This function is supposed to emit
+   the frags/bytes it assembles to.
+ */
+
+void
+md_assemble (str)
+     char *str;
+{
+  unsigned char *op_start;
+  unsigned char *op_end;
+  struct opinfo *opcode;
+  char name[20];
+  int nlen = 0;
+  char *p;
+
+  /* Drop leading whitespace */
+  while (*str == ' ')
+    str++;
+
+  /* all opcodes are three letters */
+  name[0] = str[0];
+  name[1] = str[1];
+  name[2] = str[2];
+  name[3] = 0;
+
+  tc_cons_reloc = 0;
+  str += 3;
+  opcode = (struct opinfo *) hash_find (opcode_hash_control, name);
+
+  if (opcode == NULL)
+    {
+      as_bad ("unknown opcode");
+      return;
+    }
+
+  if (opcode->amode != ADDR_IMPLIED
+      && opcode->amode != ADDR_STACK)
+    {
+      get_operands (opcode, str);
+      opcode = get_specific (opcode);
+    }
+
+  if (opcode == 0)
+    {
+      /* Couldn't find an opcode which matched the operands */
+
+
+      char *where = frag_more (1);
+
+      where[0] = 0x0;
+      where[1] = 0x0;
+      as_bad ("invalid operands for opcode");
+      return;
+    }
+
+  build_Mytes (opcode);
+}
+
+
+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_NTOF()";
+    }
+  t = atof_ieee (input_line_pointer, type, words);
+  if (t)
+    input_line_pointer = t;
+
+  *sizeP = prec * sizeof (LITTLENUM_TYPE);
+  for (wordP = words + prec - 1; prec--;)
+    {
+      md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE));
+      litP += sizeof (LITTLENUM_TYPE);
+    }
+  return 0;
+}
+
+int
+md_parse_option (c,a)
+    int c;
+    char *a;
+
+{
+  return 1;
+}
+
+int md_short_jump_size;
+
+void
+tc_Nout_fix_to_chars ()
+{
+  printf ("call to tc_Nout_fix_to_chars \n");
+  abort ();
+}
+
+void
+md_create_short_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
+     char *ptr;
+     addressT from_Nddr;
+     addressT to_Nddr;
+     fragS *frag;
+     symbolS *to_symbol;
+{
+  as_fatal ("failed sanity check.");
+}
+
+void
+md_create_long_jump (ptr, from_Nddr, to_Nddr, frag, to_symbol)
+     char *ptr;
+     addressT from_Nddr, to_Nddr;
+     fragS *frag;
+     symbolS *to_symbol;
+{
+  as_fatal ("failed sanity check.");
+}
+
+
+/*
+called after relaxing, change the frags so they know how big they are
+*/
+void
+md_convert_frag (headers, fragP)
+     object_headers *headers;
+     fragS *fragP;
+
+{
+  int disp_size = 0;
+  int inst_size = 0;
+  unsigned char *buffer = (unsigned char *) (fragP->fr_fix + fragP->fr_literal);
+
+  switch (fragP->fr_subtype)
+    {
+    case C (COND_BRANCH, BYTE_DISP):
+    case C (UNCOND_BRANCH, BYTE_DISP):
+      disp_size = 1;
+      inst_size = 1;
+      break;
+
+      /* cond branches to a known 16 bit displacement */
+    case C (COND_BRANCH, WORD_DISP):
+      switch (buffer[0])
+	{
+	case OP_BCC:
+	case OP_BCS:
+	case OP_BEQ:
+	case OP_BMI:
+	case OP_BNE:
+	case OP_BPL:
+	case OP_BVS:
+	case OP_BVC:
+	  /* Invert the sense of the test */
+	  buffer[0] ^= 0x20;
+	  buffer[1] = 3;	/* Jump over following brl */
+	  buffer[2] = OP_BRL;
+	  buffer[3] = 0;
+	  buffer[4] = 0;
+	  disp_size = 2;
+	  inst_size = 3;
+	  break;
+	default:
+	  abort ();
+	}
+      break;
+    case C (UNCOND_BRANCH, WORD_DISP):
+      /* Unconditional branches to a known 16 bit displacement */
+
+      switch (buffer[0])
+	{
+	case OP_BRA:
+	  buffer[0] = OP_BRL;
+	  disp_size = 2;
+	  inst_size = 1;
+	  break;
+	default:
+	  abort ();
+	}
+      break;
+      /* got to create a branch over a reloc here */
+    case C (COND_BRANCH, UNDEF_WORD_DISP):
+      buffer[0] ^= 0x20;	/* invert test */
+      buffer[1] = 3;
+      buffer[2] = OP_BRL;
+      buffer[3] = 0;
+      buffer[4] = 0;
+      fix_new (fragP,
+	       fragP->fr_fix + 3,
+	       4,
+	       fragP->fr_symbol,
+	       fragP->fr_offset,
+	       0,
+	       R_W65_PCR16);
+
+      fragP->fr_fix += disp_size + inst_size;
+      fragP->fr_var = 0;
+      break;
+    case C (UNCOND_BRANCH, UNDEF_WORD_DISP):
+      buffer[0] = OP_BRL;
+      buffer[1] = 0;
+      buffer[2] = 0;
+      fix_new (fragP,
+	       fragP->fr_fix + 1,
+	       4,
+	       fragP->fr_symbol,
+	       fragP->fr_offset,
+	       0,
+	       R_W65_PCR16);
+
+      fragP->fr_fix += disp_size + inst_size;
+      fragP->fr_var = 0;
+      break;
+    default:
+      abort ();
+    }
+  if (inst_size)
+    {
+      /* Get the address of the end of the instruction */
+      int next_inst = fragP->fr_fix + fragP->fr_address + disp_size + inst_size;
+      int targ_addr = (S_GET_VALUE (fragP->fr_symbol) +
+		       fragP->fr_offset);
+      int disp = targ_addr - next_inst;
+
+      md_number_to_chars (buffer + inst_size, disp, disp_size);
+      fragP->fr_fix += disp_size + inst_size;
+      fragP->fr_var = 0;
+    }
+}
+
+
+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;
+  int addr = fixP->fx_frag->fr_address + fixP->fx_where;
+
+  if (fixP->fx_r_type == 0)
+    {
+      if (fixP->fx_size == 1)
+	fixP->fx_r_type = R_W65_ABS8;
+      else
+	fixP->fx_r_type = R_W65_ABS16;
+    }
+
+  switch (fixP->fx_r_type)
+    {
+    case R_W65_ABS8S16:
+      val >>= 8;
+    case R_W65_ABS8S8:
+      val >>= 8;
+    case R_W65_ABS8:
+      *buf++ = val;
+      break;
+    case R_W65_ABS16S16:
+      val >>= 8;
+    case R_W65_ABS16S8:
+      val >>= 8;
+    case R_W65_ABS16:
+      *buf++ = val >> 0;
+      *buf++ = val >> 8;
+      break;
+    case R_W65_ABS24:
+      *buf++ = val >> 0;
+      *buf++ = val >> 8;
+      *buf++ = val >> 16;
+      break;
+    case R_W65_PCR8:
+      *buf++ = val - addr - 1;
+      break;
+    case R_W65_PCR16:
+      val = val - addr - 1;
+      *buf++ = val;
+      *buf++ = val >> 8;
+      break;
+    case R_W65_DP:
+      *buf++ = val;
+      break;
+
+    default:
+      abort ();
+    }
+}
+
+void
+DEFUN (md_operand, (expressionP), expressionS * expressionP)
+{
+}
+
+int md_long_jump_size;
+
+/* Put number into target byte order */
+
+void
+md_number_to_chars (ptr, use, nbytes)
+     char *ptr;
+     valueT use;
+     int nbytes;
+{
+  number_to_chars_littleendian (ptr, use, nbytes);
+}
+
+long
+md_pcrel_from (fixP)
+     fixS *fixP;
+{
+  int gap = fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address - 1;
+  return gap;
+}
+
+void
+tc_coff_symbol_emit_hook (x)
+    struct symbol *x;
+{
+}
+
+short
+tc_coff_fix2rtype (fix_ptr)
+     fixS *fix_ptr;
+{
+  return fix_ptr->fx_r_type;
+}
+
+void
+tc_reloc_mangle (fix_ptr, intr, base)
+     fixS *fix_ptr;
+     struct internal_reloc *intr;
+     bfd_vma base;
+
+{
+  symbolS *symbol_ptr;
+
+  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 == RELOC_32)
+    {
+      /* 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;
+	default:
+	  abort ();
+	}
+    }
+  else
+    {
+      if (fix_ptr->fx_size == 4)
+	intr->r_type = R_W65_ABS24;
+      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;
+
+  /* Turn the segment of the symbol into an offset.  */
+  if (symbol_ptr)
+    {
+      symbolS *dot;
+
+      dot = segment_info[S_GET_SEGMENT (symbol_ptr)].dot;
+      if (dot)
+	{
+	  intr->r_offset += S_GET_VALUE (symbol_ptr);
+	  intr->r_symndx = dot->sy_number;
+	}
+      else
+	{
+	  intr->r_symndx = symbol_ptr->sy_number;
+	}
+    }
+  else
+    {
+      intr->r_symndx = -1;
+    }
+}
+
+int
+tc_coff_sizemachdep (frag)
+     fragS *frag;
+{
+  return md_relax_table[frag->fr_subtype].rlx_length;
+}
+
+
+
+
+
+/*
+called just before address relaxation, return the length
+by which a fragment must grow to reach it's destination
+*/
+int
+md_estimate_size_before_relax (fragP, segment_type)
+     register fragS *fragP;
+     register segT segment_type;
+{
+  int what = GET_WHAT (fragP->fr_subtype);
+
+  switch (fragP->fr_subtype)
+    {
+    default:
+      abort ();
+    case C (COND_BRANCH, UNDEF_BYTE_DISP):
+    case C (UNCOND_BRANCH, UNDEF_BYTE_DISP):
+      /* used to be a branch to somewhere which was unknown */
+      if (S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
+	{
+	  /* Got a symbol and it's defined in this segment, become byte
+	 sized - maybe it will fix up */
+	  fragP->fr_subtype = C (what, BYTE_DISP);
+	  fragP->fr_var = md_relax_table[C (what, BYTE_DISP)].rlx_length;
+	}
+      else
+	{
+	  /* Its got a segment, but its not ours, so it will always be long */
+	  fragP->fr_subtype = C (what, UNDEF_WORD_DISP);
+	  fragP->fr_var = md_relax_table[C (what, WORD_DISP)].rlx_length;
+	  return md_relax_table[C (what, WORD_DISP)].rlx_length;
+	}
+    }
+  return fragP->fr_var;
+}
+
+
+
+CONST char *md_shortopts = "";
+struct option md_longopts[] = {
+#define OPTION_RELAX (OPTION_MD_BASE)
+  {NULL, no_argument, NULL, 0}
+};
+
+void
+md_show_usage (stream)
+     FILE *stream;
+{
+
+}
+
+size_t md_longopts_size = sizeof(md_longopts);
diff --git a/gas/config/tc-w65.h b/gas/config/tc-w65.h
new file mode 100644
index 0000000..bc0d203
--- /dev/null
+++ b/gas/config/tc-w65.h
@@ -0,0 +1,47 @@
+/* This file is tc-w65.h
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+#define TC_W65
+
+/* This macro translates between an internal fix and an coff reloc type */
+#define TC_COFF_FIX2RTYPE(fixP) tc_coff_fix2rtype(fixP)
+
+#define BFD_ARCH bfd_arch_w65
+#define COFF_MAGIC 0x6500
+
+#define IGNORE_NONSTANDARD_ESCAPES
+
+#define TC_RELOC_MANGLE(a,b,c) tc_reloc_mangle(a,b,c)
+
+#define DO_NOT_STRIP 0
+#define DO_STRIP 0
+#define LISTING_HEADER "W65816 GAS "
+#define NEED_FX_R_TYPE 1
+#define RELOC_32 1234
+
+#define TC_COFF_SIZEMACHDEP(frag) tc_coff_sizemachdep(frag)
+#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) w65_expression (EXP, NBYTES)
+#define TC_COUNT_RELOC(x) (1)
+#define TC_CONS_RELOC tc_cons_reloc
+#define DONT_OVERFLOW
+int tc_cons_reloc;
+/* end of tc-w65.h */
+
diff --git a/gas/config/w65.mt b/gas/config/w65.mt
new file mode 100755
index 0000000..b39faae
--- /dev/null
+++ b/gas/config/w65.mt
@@ -0,0 +1,2 @@
+TARG_CPU_DEPENDENTS=$(srcdir)/../opcodes/w65-opc.h
+