ASMB,L,R,C
* 
*  **************************************************************** 
*  * (C) COPYRIGHT HEWLETT-PACKARD COMPANY 1979.  ALL RIGHTS      * 
*  * RESERVED.  NO PART OF THIS PROGRAM MAY BE PHOTOCOPIED,       * 
*  * REPRODUCED OR TRANSLATED TO ANOTHER PROGRAM LANGUAGE WITHOUT * 
*  * THE PRIOR WRITTEN CONSENT OF HEWLETT-PACKARD COMPANY.        * 
*  **************************************************************** 
* 
*   NAME: PART OF MATH LIBRARY
*   SOURCE:  24998-18XXX  SEE NAM FOR LAST THREE DIGITS 
*   RELOC: PART OF 24998-12001
*   PGMR: BG & JTS
* 
      HED ".DDE" - DOUBLE INTEGER DECREMENT.
      NAM .DDE,7 24998-1X039 REV.2001 780818
* 
      ENT .DDE
* 
A     EQU 0 
B     EQU 1 
* 
*     .DDE SUBTRACTS ONE FROM A DOUBLE INTEGER. 
* 
*     CALLING SEQUENCE: 
* 
*                   DLD <ARG> 
*                   JSB .DDE
*                   <RETURN>   (A,B) = RESULT 
* 
*     IF THE ARGUMENT IS (100000,000000) THE VALUE (077777,177777)
*     IS RETURNED AND THE OVERFLOW BIT IS SET, ELSE IT IS CLEARED.
*     THE "E" BIT IS CHANGED ONLY IF BOTH IT AND THE ARGUMENT ARE ZERO. 
      SPC 4 
.DDE  NOP 
      CLO           NEGATE ARGUMENT.
      CMA 
      CMB 
      ISZ B 
      JMP *+2 
      INA 
      CMA           COMPLEMENT IT.
      CMB 
      JMP .DDE,I
* 
      END 
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