/** 
   -- miscellaneous useful extra words for DOUBLE-EXT
  
    Copyright (C) Tektronix, Inc. 1998 - 2001. All rights reserved.
  
    @see     GNU LGPL
    @author  Tektronix CTE              @(#) %derived_by: guidod %
    @version %version:  %
      (%date_modified:  %)
  
    @description
        Compatiblity with former standards, miscellaneous useful words.
        ... for DOUBLE-EXT  (which is almost complete... just almost)
 */
/*@{*/
#if defined(__version_control__) && defined(__GNUC__)
static char* id __attribute__((unused)) = 
"@(#) $Id: %full_filespec:   % $";
#endif

#define _P4_SOURCE 1

#include <pfe/pfe-base.h>
#include <pfe/double-sub.h>

#define UDP ((p4udcell *)SP)

/** 2ROT ( d1,d1 d2,d2 d3,d3 -- d2,d2 d3,d3 d1,d1 )
   the double-cell => ROT operation.
   actively moves six cells, i.e.
   ( x1 x2 x3 x4 x5 x6 -- x3 x4 x5 x6 x1 x2 )
 */
FCode (p4_two_rot)
{
    p4cell h;

    h = SP[4];
    SP[4] = SP[2];
    SP[2] = SP[0];
    SP[0] = h;
    h = SP[5];
    SP[5] = SP[3];
    SP[3] = SP[1];
    SP[1] = h;
}



/** DU< ( d1,d1 d2,d2 -- flag )
   the double-cell unsigned-is-less operation ( =>"U<" )
 */
FCode (p4_d_u_less)
{
    SP[3] = P4_FLAG (p4_d_u_less (&UDP[1], &UDP[0]));
    SP += 3;
}


/** LITERAL, ( value -- )
   take the value from stack (or cs-stack) and compile a runtime-code and
   the value as for => LITERAL ... this word is never state-smart, it
   is not immediate, and has therefore no complications with => POSTPONE
   (compare also with =>"COMPILE," to make a call-stub with an exectoken)
 */
FCode (p4_literal_comma)
{
    FX_COMPILE (p4_literal);
    FX_VCOMMA (*SP++);
}


/** 2LITERAL, ( x1,x2 -- )
   take the double-value from stack (or cs-stack) and compile a runtime-code 
   and the value as for => 2LITERAL ... this word is never state-smart, it
   is not immediate, and has therefore no complications with => POSTPONE
   (compare also with =>"COMPILE," to make a call-stub with an exectoken)
 */
FCode (p4_two_literal_comma)
{
    FX_COMPILE (p4_two_literal);
    FX_VCOMMA (((p4dcell*)SP)->hi);
    FX_VCOMMA (((p4dcell*)SP)->lo);
    FX_2DROP;
}


P4_LISTWORDS (double_misc) =
{
    P4_INTO ("FORTH", "[ANS]"),

    P4_FXco ("2ROT",         p4_two_rot),
    P4_FXco ("DU<",          p4_d_u_less),

    P4_FXco ("LITERAL,",     p4_literal_comma),
    P4_FXco ("2LITERAL,",    p4_two_literal_comma),
}
;
P4_COUNTWORDS (double_misc, "DOUBLE-Misc Compatibility words");

/*@}*/
/* 
   Local variables:
   c-file-style: "stroustrup"
   End:
 */