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/* BFD library support routines for the i960 architecture.

   Copyright 1990, 1991, 1993, 1994, 1996, 1999, 2000, 2001

   Free Software Foundation, Inc.

   Hacked by Steve Chamberlain of Cygnus Support.

This file is part of BFD, the Binary File Descriptor library.

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 of the License, 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 "bfd.h"

#include "sysdep.h"

#include "libbfd.h"

static boolean scan_960_mach

  PARAMS ((const bfd_arch_info_type *, const char *));

static const bfd_arch_info_type *compatible

  PARAMS ((const bfd_arch_info_type *, const bfd_arch_info_type *));

/* This routine is provided a string, and tries to work out if it

   could possibly refer to the i960 machine pointed at in the

   info_struct pointer */

static boolean

scan_960_mach (ap, string)

     const bfd_arch_info_type *ap;

     const char *string;

{

  unsigned long machine;

  int fail_because_not_80960 = false;

  /* Look for the string i960 at the front of the string.  */

  if (strncasecmp ("i960", string, 4) == 0)

    {

      string += 4;

      /* i960 on it's own means core to us.  */

      if (* string == 0)

        return ap->mach == bfd_mach_i960_core;

      /* "i960:*" is valid, anything else is not.  */

      if (* string != ':')

        return false;

      string ++;

    }

  /* In some bfds the cpu-id is written as "80960KA", "80960KB",

     "80960CA" or "80960MC".  */

  else if (strncmp ("80960", string, 5) == 0)

    {

      string += 5;

      /* Sett his to true here.  If a correct matching postfix

         is detected below it will be reset to false.  */

      fail_because_not_80960 = true;

    }

  /* No match, can't be us.  */

  else

    return false;

  if (* string == '\0')

    return false;

  if (string[0] == 'c' && string[1] == 'o' && string[2] == 'r' &&

      string[3] == 'e' && string[4] == '\0')

    machine = bfd_mach_i960_core;

  else if (strcasecmp (string, "ka_sa") == 0)

    machine = bfd_mach_i960_ka_sa;

  else if (strcasecmp (string, "kb_sb") == 0)

    machine = bfd_mach_i960_kb_sb;

  else if (string[1] == '\0' || string[2] != '\0') /* rest are 2-char.  */

    return false;

  else if (string[0] == 'k' && string[1] == 'b')

    { machine = bfd_mach_i960_kb_sb; fail_because_not_80960 = false; }

  else if (string[0] == 's' && string[1] == 'b')

    machine = bfd_mach_i960_kb_sb;

  else if (string[0] == 'm' && string[1] == 'c')

    { machine = bfd_mach_i960_mc; fail_because_not_80960 = false; }

  else if (string[0] == 'x' && string[1] == 'a')

    machine = bfd_mach_i960_xa;

  else if (string[0] == 'c' && string[1] == 'a')

    { machine = bfd_mach_i960_ca; fail_because_not_80960 = false; }

  else if (string[0] == 'k' && string[1] == 'a')

    { machine = bfd_mach_i960_ka_sa; fail_because_not_80960 = false; }

  else if (string[0] == 's' && string[1] == 'a')

    machine = bfd_mach_i960_ka_sa;

  else if (string[0] == 'j' && string[1] == 'x')

    machine = bfd_mach_i960_jx;

  else if (string[0] == 'h' && string[1] == 'x')

    machine = bfd_mach_i960_hx;

  else

    return false;

  if (fail_because_not_80960)

    return false;

  if (machine == ap->mach)

    return true;

  return false;

}

/* This routine is provided two arch_infos and works out the i960

   machine which would be compatible with both and returns a pointer

   to its info structure */

static const bfd_arch_info_type *

compatible (a,b)

     const bfd_arch_info_type *a;

     const bfd_arch_info_type *b;

{

  /* The i960 has distinct subspecies which may not interbreed:

        CORE CA

        CORE KA KB MC XA

        CORE HX JX

     Any architecture on the same line is compatible, the one on

     the right is the least restrictive.

     We represent this information in an array, each machine to a side */

#define ERROR   0

#define CORE    bfd_mach_i960_core  /*1*/

#define KA      bfd_mach_i960_ka_sa /*2*/

#define KB      bfd_mach_i960_kb_sb /*3*/

#define MC      bfd_mach_i960_mc    /*4*/

#define XA      bfd_mach_i960_xa    /*5*/

#define CA      bfd_mach_i960_ca    /*6*/

#define JX      bfd_mach_i960_jx    /*7*/

#define HX      bfd_mach_i960_hx    /*8*/

#define MAX_ARCH ((int)HX)

  static const unsigned long matrix[MAX_ARCH+1][MAX_ARCH+1] =

    {

      { ERROR,  CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },

      { CORE,   CORE,   KA,     KB,     MC,     XA,     CA,     JX,     HX },

      { KA,     KA,     KA,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},

      { KB,     KB,     KB,     KB,     MC,     XA,     ERROR,  ERROR,  ERROR},

      { MC,     MC,     MC,     MC,     MC,     XA,     ERROR,  ERROR,  ERROR},

      { XA,     XA,     XA,     XA,     XA,     XA,     ERROR,  ERROR,  ERROR},

      { CA,     CA,     ERROR,  ERROR,  ERROR,  ERROR,  CA,     ERROR,  ERROR},

      { JX,     JX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  JX,     HX },

      { HX,     HX,     ERROR,  ERROR,  ERROR,  ERROR,  ERROR,  HX,     HX },

    };

  if (a->arch != b->arch || matrix[a->mach][b->mach] == ERROR)

    {

    return NULL;

    }

  else

    {

    return (a->mach  ==  matrix[a->mach][b->mach]) ?  a : b;

    }

}

#define N(a,b,d,n) \

{ 32, 32, 8,bfd_arch_i960,a,"i960",b,3,d,compatible,scan_960_mach,n,}

static const bfd_arch_info_type arch_info_struct[] =

{

  N(bfd_mach_i960_ka_sa,"i960:ka_sa",false, &arch_info_struct[1]),

  N(bfd_mach_i960_kb_sb,"i960:kb_sb",false, &arch_info_struct[2]),

  N(bfd_mach_i960_mc,   "i960:mc",   false, &arch_info_struct[3]),

  N(bfd_mach_i960_xa,   "i960:xa",   false, &arch_info_struct[4]),

  N(bfd_mach_i960_ca,   "i960:ca",   false, &arch_info_struct[5]),

  N(bfd_mach_i960_jx,   "i960:jx",   false, &arch_info_struct[6]),

  N(bfd_mach_i960_hx,   "i960:hx",   false, 0),

};

const bfd_arch_info_type bfd_i960_arch =

  N(bfd_mach_i960_core, "i960:core", true, &arch_info_struct[0]);