asmsupt.lst

来自「DOS SOURCE CODE,DOS-C started in 1988 as」· LST 代码 · 共 200 行

Turbo Assembler	 Version 3.1	    04/11/13 12:54:49	    Page 1
ASMSUPT.ASM



      1				     ; File:
      2				     ;			       asmsupt.asm
      3				     ; Description:
      4				     ;	     Assembly support routines for miscellaneous functions
      5				     ;
      6				     ;			     Copyright (c) 1995
      7				     ;			     Pasquale J. Villani
      8				     ;			     All Rights	Reserved
      9				     ;
     10				     ; This file is part of DOS-C.
     11				     ;
     12				     ; DOS-C is	free software; you can redistribute it and/or
     13				     ; modify it under the terms of the	GNU General Public License
     14				     ; as published by the Free	Software Foundation; either version
     15				     ; 2, or (at your option) any later	version.
     16				     ;
     17				     ; DOS-C is	distributed in the hope	that it	will be	useful,	but
     18				     ; WITHOUT ANY WARRANTY; without even the implied warranty of
     19				     ; MERCHANTABILITY or FITNESS FOR A	PARTICULAR PURPOSE.  See
     20				     ; the GNU General Public License for more details.
     21				     ;
     22				     ; You should have received	a copy of the GNU General Public
     23				     ; License along with DOS-C; see the file COPYING.	If not,
     24				     ; write to	the Free Software Foundation, 675 Mass Ave,
     25				     ; Cambridge, MA 02139, USA.
     26				     ;
     27				     ; $Logfile:   C:/dos-c/src/kernel/asmsupt.asv  $
     28				     ;
     29				     ; $Header:	  C:/dos-c/src/kernel/asmsupt.asv   1.3	  03 Jan 1998  8:36:44	 patv  $
     30				     ;
     31				     ; $Log:   C:/dos-c/src/kernel/asmsupt.asv	$
     32				     ;
     33				     ;	  Rev 1.3   03 Jan 1998	 8:36:44   patv
     34				     ; Converted data area to SDA format
     35				     ;
     36				     ;	  Rev 1.2   29 May 1996	21:03:38   patv
     37				     ; bug fixes for v0.91a
     38				     ;
     39				     ;	  Rev 1.1   01 Sep 1995	17:54:26   patv
     40				     ; First GPL release.
     41				     ;
     42				     ;	  Rev 1.0   05 Jul 1995	11:38:42   patv
     43				     ; Initial revision.
     44				     ;
     45
     46
     47	0000			     _TEXT	     segment byte public 'CODE'
     48				     DGROUP	     group   _DATA,_BSS,_BSSEND		     ; small model
     49						     assume  cs:_TEXT,ds:DGROUP,ss:DGROUP
     50	0000			     _TEXT	     ends
     51
     52	0000			     _DATA	     segment word public 'DATA'
     53	0000			     _DATA	     ends
     54
     55	0000			     _BSS	     segment word public 'BSS'
Turbo Assembler	 Version 3.1	    04/11/13 12:54:49	    Page 2
ASMSUPT.ASM



     56	0000			     _BSS	     ends
     57
     58	0000			     _BSSEND	     segment byte public 'STACK'
     59	0000			     _BSSEND	     ends
     60
     61
     62
     63	0000			     _TEXT	     segment byte public 'CODE'
     64				     ;
     65				     ;	     VOID bcopy(s, d, n)
     66				     ;	     REG BYTE *s, *d;
     67				     ;	     REG COUNT n;
     68				     ;
     69				     ;
     70						     assume  cs:_TEXT
     71						     public  _bcopy
     72	0000			     _bcopy	     proc    near
     73	0000  55				     push    bp			     ; Standard	C entry
     74	0001  8B EC				     mov     bp,sp
     75	0003  56				     push    si
     76	0004  57				     push    di
     77	0005  06				     push    es
     78
     79						     ; Get the repitition count, n
     80	0006  8B 4E 08				     mov     cx,[bp+8]
     81	0009  0B C9				     or	     cx,cx
     82	000B  74 0D				     jz	     short bcopy_exit
     83
     84						     ; Set both	ds and es to same segment (for near copy)
     85	000D  8C D8				     mov	     ax,ds
     86	000F  8E C0				     mov	     es,ax
     87
     88						     ; Get the source pointer, ss
     89	0011  8B 76 04				     mov	     si,[bp+4]
     90
     91						     ; and the destination pointer, d
     92	0014  8B 7E 06				     mov	     di,[bp+6]
     93
     94						     ; Set direction to	autoincrement
     95	0017  FC				     cld
     96
     97						     ; And do the built-in byte	copy
     98	0018  F3> A4				     rep     movsb
     99
    100						     ; Finally do a C exit to return
    101	001A  07		     bcopy_exit:     pop     es
    102	001B  5F				     pop     di
    103	001C  5E				     pop     si
    104	001D  5D				     pop     bp
    105	001E  C3				     ret
    106	001F			     _bcopy	     endp
    107
    108
    109				     ;
    110				     ;	     VOID fbcopy(s, d, n)
Turbo Assembler	 Version 3.1	    04/11/13 12:54:49	    Page 3
ASMSUPT.ASM



    111				     ;
    112				     ;	     REG VOID FAR *s, FAR *d;
    113				     ;	     REG COUNT n;
    114						     assume  cs:_TEXT
    115						     public  _fbcopy
    116	001F			     _fbcopy	     proc    near
    117	001F  55				     push    bp		     ; Standard	C entry
    118	0020  8B EC				     mov     bp,sp
    119	0022  56				     push    si
    120	0023  57				     push    di
    121
    122						     ; Save ds,	since we won't necessarily be within our
    123						     ; small/tiny environment
    124	0024  1E				     push    ds
    125	0025  06				     push    es
    126
    127						     ; Get the repititon count,	n
    128	0026  8B 4E 0C				     mov     cx,[bp+12]
    129	0029  0B C9				     or	     cx,cx
    130	002B  74 09				     jz	     short fbcopy_exit
    131
    132						     ; Get the far source pointer, s
    133	002D  C5 76 04				     lds     si,DWORD PTR [bp+4]
    134
    135						     ; Get the far destination pointer d
    136	0030  C4 7E 08				     les     di,DWORD PTR [bp+8]
    137
    138						     ; Set direction to	autoincrement
    139	0033  FC				     cld
    140
    141						     ; And do the built-in byte	copy
    142	0034  F3> A4				     rep     movsb
    143
    144						     ; recover ds
    145	0036  07		     fbcopy_exit:    pop     es
    146	0037  1F				     pop     ds
    147
    148						     ; Do a standard C exit and	return
    149	0038  5F				     pop     di
    150	0039  5E				     pop     si
    151	003A  5D				     pop     bp
    152	003B  C3				     ret
    153	003C			     _fbcopy	     endp
    154	003C			     _TEXT	     ENDS
    155						     end
Turbo Assembler	 Version 3.1	    04/11/13 12:54:49	    Page 4
Symbol Table




Symbol Name			  Type	 Value

??DATE				  Text	 "04/11/13"
??FILENAME			  Text	 "ASMSUPT "
??TIME				  Text	 "12:54:49"
??VERSION			  Number 030A
@CPU				  Text	 0101H
@CURSEG				  Text	 _TEXT
@FILENAME			  Text	 ASMSUPT
@WORDSIZE			  Text	 2
BCOPY_EXIT			  Near	 _TEXT:001A
FBCOPY_EXIT			  Near	 _TEXT:0036
STANDALONE			  Text	 1
_BCOPY (_bcopy)			  Near	 _TEXT:0000
_FBCOPY	(_fbcopy)		  Near	 _TEXT:001F

Groups & Segments		  Bit Size Align  Combine Class

DGROUP				  Group
  _BSS				  16  0000 Word	  Public  BSS
  _BSSEND			  16  0000 Byte	  Public  STACK
  _DATA				  16  0000 Word	  Public  DATA
_TEXT				  16  003C Byte	  Public  CODE