Subversion Repositories tendra.SVN

/*

    		 Crown Copyright (c) 1997

    This TenDRA(r) Computer Program is subject to Copyright

    owned by the United Kingdom Secretary of State for Defence

    acting through the Defence Evaluation and Research Agency

    (DERA).  It is made available to Recipients with a

    royalty-free licence for its use, reproduction, transfer

    to other parties and amendment for any purpose not excluding

    product development provided that any such use et cetera

    shall be deemed to be acceptance of the following conditions:-

        (1) Its Recipients shall ensure that this Notice is

        reproduced upon any copies or amended versions of it;

        (2) Any amended version of it shall be clearly marked to

        show both the nature of and the organisation responsible

        for the relevant amendment or amendments;

        (3) Its onward transfer from a recipient to another

        party shall be deemed to be that party's acceptance of

        these conditions;

        (4) DERA gives no warranty or assurance as to its

        quality or suitability for any purpose and DERA accepts

        no liability whatsoever in relation to any use to which

        it may be put.

*/

/* svr4/assembler.c */

/**********************************************************************

$Author: release $

$Date: 1998/01/17 15:55:53 $

$Revision: 1.1.1.1 $

$Log: assembler.c,v $

 * Revision 1.1.1.1  1998/01/17  15:55:53  release

 * First version to be checked into rolling release.

 *

 * Revision 1.7  1997/03/24  12:43:46  pwe

 * outn int->long

 *

 * Revision 1.6  1995/10/23  17:34:52  pwe

 * dynamic initialisation PIC, and sco diags

 *

 * Revision 1.5  1995/10/09  15:14:48  pwe

 * dynamic initialisation etc

 *

 * Revision 1.4  1995/07/07  15:22:39  pwe

 * prepare for 4.0, and correct PIC switch

 *

 * Revision 1.3  1995/02/20  09:50:56  pwe

 * alignment of bitfield global data

 *

 * Revision 1.2  1995/01/30  12:57:39  pwe

 * Ownership -> PWE, tidy banners

 *

 * Revision 1.1  1994/10/27  12:16:59  jmf

 * Initial revision

 *

 * Revision 1.2  1994/07/13  07:51:05  jmf

 * Added Log

 *

**********************************************************************/

#include "config.h"

#include "common_types.h"

#include "out.h"

#include "expmacs.h"

#include "exp.h"

#include "localflags.h"

#include "shapemacs.h"

#include "operand.h"

#include "machine.h"

#include "flags.h"

#include "basicread.h"

/* PROCEDURES */

void outbyte

    PROTO_Z ()

{

  outs(".byte ");

  return;

}

void outshort

    PROTO_Z ()

{

  outs(".2byte ");

  return;

}

void outlong

    PROTO_Z ()

{

  outs(".4byte ");

  return;

}

void align_label

    PROTO_N ( (f, jr) )

    PROTO_T ( int f X exp jr )

{

  if (is80486 && !is80586 && ptno(jr) != last_jump_label)  {

/* forward jump and continued into

    if (f==0)

      outs(".align 16,7,1");

*/

    if (f == 1)	/* repeat jump */

      outs(".align 16,7,1");

    if (f == 2)	/* preceded by a jmp or ret */

      outs(".align 16,7,1");

    if (f == 3)

      outs(".align 4");

    outs("\n");

  };

  if (is80586 && ptno(jr) != last_jump_label)  {

    if (f >= 1 && f <= 3)

      outs(".align 4\n");

  };

  return;

}

void eval_postlude

    PROTO_N ( (s, c) )

    PROTO_T ( char * s X exp c )

{

    outs(".size ");

    outs (s);

    outs (",");

    outn((long)(shape_size(sh(c))+7)/8);

    outnl();

    outs(".type ");

    outs (s);

    outs (",@object");

    outnl();

    return;

}

void out_readonly_section

    PROTO_Z ()

{

  outs (".section .rodata");

  return;

}

void out_dot_comm

    PROTO_N ( (id, sha) )

    PROTO_T ( char * id X shape sha )

{

	outs (".comm ");

	outs (id);

	outs (",");

        outn((long)shape_size(sha)/ 8);

	outs (",");

        if (is80486 && (name(sha) == realhd ||

             (name(sha) == nofhd && ptno(sha) == realhd) ||

		shape_size(sha) >= 512))

                /* the pt field of an nof is used to hold the

		   shapemacs.h hd description of the shape and is set in

		   f_nof */

          outn((long)8);

        else

	if (shape_align(sha)<8) {	/* alignment of bitfields */

	  int nbytes = (shape_size(sha)+7)/8;

	  outn ((long)((nbytes<4) ? nbytes : 4));

	}

	else

	  outn((long)shape_align(sha)/8);

	outnl ();

  return;

}

void out_dot_lcomm

    PROTO_N ( (id, sha) )

    PROTO_T ( char * id X shape sha )

{

	outs (".lcomm ");

	outs (id);

	outs (",");

        outn((long)shape_size(sha)/ 8);

	outs (",");

        if (is80486 && (name(sha) == realhd ||

             (name(sha) == nofhd && ptno(sha) == realhd) ||

		shape_size(sha) >= 512))

                /* the pt field of an nof is used to hold the

		   shapemacs.h hd description of the shape and is set in

		   f_nof */

          outn((long)8);

        else

	if (shape_align(sha)<8) {	/* alignment of bitfields */

	  int nbytes = (shape_size(sha)+7)/8;

	  outn ((long)((nbytes<4) ? nbytes : 4));

	}

	else

	  outn((long)shape_align(sha)/8);

	outnl ();

  return;

}

void out_bss

    PROTO_N ( (id, sha) )

    PROTO_T ( char * id X shape sha )

{

	outs (".bss ");

	outs (id);

	outs (",");

	outn ((long)((( shape_size(sha)/ 8) + 3) / 4) * 4);

	outnl ();

  return;

}

static int pic_label;

void pic_prelude

    PROTO_Z ()

{

  int n = next_lab();

  pic_label = n;

  outs(" call .L"); outn((long)n); outnl();

  outs(".L"); outn((long)n); outs(":"); outnl();

  outs(" popl %ebx"); outnl();

  outs(" addl $_GLOBAL_OFFSET_TABLE_+[.-.L"); outn((long)n); outs("],%ebx");

    outnl();

  return;

}

void out_rename

    PROTO_N ( (oldid, newid) )

    PROTO_T ( char * oldid X char * newid )

{

  outs(".set "); outs(oldid); outs(","); outs(newid); outnl();

  return;

}

void out_switch_jump

    PROTO_N ( (tab, a, min) )

    PROTO_T ( int tab X where a X int min )

{

  if (PIC_code)  {

    outs(" leal ");

    outs(local_prefix);

    outn((long)tab);

    outs("@GOTOFF(%ebx,");

    operand (32, a, 1, 0);

    outs(",4),%eax");

    outnl();

    outs(" movl ");

    outs("-");

    outn((long)(4 * min));

    outs ("(%eax),%eax");

    outnl();

    outs(" addl %ebx,%eax");

    outnl();

    outs(" subl $_GLOBAL_OFFSET_TABLE_+[.-.L"); outn((long)pic_label);

      outs("],%eax"); outnl();

    outs(" jmp *%eax");

    outnl();

    return;

    /* MODIFY FOR NEW CASE !!!!! */

  }

  else  {

    outs (" jmp *");

    outs(local_prefix);

    outn((long)tab);

    outs("-");

    outn((long)(4 * min));

    outs ("(,");

    operand (32, a, 1, 0);

    outs (",4)");

    outnl ();

    return;

  };

}

void out_switch_table

    PROTO_N ( (tab, min, max, v, absent) )

    PROTO_T ( int tab X int min X int max X int * v X int absent )

{

  int i;

  if (PIC_code)  {

    outs(".section .rodata");

    outnl();

    outs(".align 4");

    outnl();

    outs(local_prefix);

    outn ((long)tab);

    outs (":");

    outnl ();

    for (i = min; i <= max; ++i) {

      outs (".long ");

      if (v[i - min] != -1)  {

        outs(local_prefix);

        outn ((long)v[i - min]);

        outs("-");

        outs(local_prefix);

        outn((long)pic_label);

      }

      else  {

	if (absent == -1)

	  outn((long)0);

        else {

          outs(local_prefix);

          outn ((long)absent);

          outs("-");

          outs(local_prefix);

          outn((long)pic_label);

	};

      };

      outnl ();

    };

    outs(".text");

    outnl();

    return;

  }

  else  {

    outs(".section .rodata");

    outnl();

    outs(".align 4");

    outnl();

    outs(local_prefix);

    outn ((long)tab);

    outs (":");

    outnl ();

    for (i = min; i <= max; ++i) {

      outs (".long ");

      if (v[i - min] != -1)  {

        outs(local_prefix);

        outn ((long)v[i - min]);

      }

      else  {

	if (absent == -1)

          outn ((long)0);

	else {

          outs(local_prefix);

          outn ((long)absent);

	};

      };

      outnl ();

    };

    outs(".text");

    outnl();

    return;

  };

}

void proc_size

    PROTO_N ( (s) )

    PROTO_T ( char * s )

{

  outs(".align 16,7,4");

  outnl();

  outs(".size ");

  outs(s);

  outs(", .-");

  outs(s);

  outnl();

}

void proc_type

    PROTO_N ( (s) )

    PROTO_T ( char * s )

{

  outs(".type ");

  outs(s);

  outs(",@function");

  outnl();

  return;

}

void dot_align

    PROTO_N ( (n) )

    PROTO_T ( int n )

{

  outs(".align "); outn((long)n); outnl();

  return;

}

void outend

    PROTO_Z ()

{		/* close the output */

  int   st = fclose (fpout);

  if (st == EOF) {

    failer ("failed to close file");

    exit(EXIT_FAILURE);

  };

}

void outopenbr

    PROTO_Z ()

{

  outs("[");

  return;

}

void outclosebr

    PROTO_Z ()

{

  outs("]");

  return;

}

void outdivsym

    PROTO_Z ()

{

  outs("\\/");

  return;

}

void out_initialiser

    PROTO_N ( (id) )

    PROTO_T ( char* id )

{

  outs (".section .init\n");

  outs (" call ");

  outs (id);

  if (PIC_code)

    outs ("@PLT");

  outnl ();

  outnl ();

  return;

}