ASMB,R,L,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 "DCOS" EXTENDED PRECISION COSINE
      NAM DCOS,6 24998-1X094 REV.2001 750701
      ENT DCOS
      EXT DSIN,.ENTP,.XADD
      EXT .ZRNT 
XADD  EQU .XADD 
      SPC 1 
* 
*     EXTENDED PRECISION COSINE (COS(X) = SIN(X+PI/2))
*     CALLING SEQUENCE: 
*     JSB DCOS
*         DEF *+3 
*         DEF Y     Y = COS(X)
*         DEF X 
      SPC 1 
TDB   NOP 
      DEC 8 
      NOP 
X1    REP 3 
      NOP 
Y     NOP 
X     NOP 
      SPC 1 
DCOS  NOP 
      JSB .ZRNT 
      DEF LIBX
      JSB .ENTP 
      DEF Y 
      STA TDB+2 
      JSB XADD
      DEF X1
      DEF X,I 
      DEF PI2 
      JSB DSIN      Y = DSIN(X1)
      DEF *+3 
      DEF Y,I 
      DEF X1
LIBX  JMP TDB+2,I 
      DEF TDB 
      DEC 0 
      SPC 1 
PI2   OCT 62207,166521,10402
      END 
* 
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