1 /*-------------------------------------------------------------------------
3 _gptrget.c :- get value for a generic pointer
5 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1999)
7 This library is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Library General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU Library General Public License for more details.
17 You should have received a copy of the GNU Library General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 In other words, you are welcome to use, share and improve this program.
22 You are forbidden to forbid anyone else to use, share and improve
23 what you give them. Help stamp out software-hoarding!
24 -------------------------------------------------------------------------*/
26 #define P2_PAGES_PDATA 0 /* not all devices use P2 to page pdata memory */
28 /* the return value is expected to be in acc, and not in the standard
29 * location dpl. Therefore we choose return type void here: */
33 gptr; /* hush the compiler */
38 ; depending on the pointer type acc. to SDCCsymt.h
48 dec a ; 4 skip generic pointer
52 ; any other value for type
57 ; Pointer to data space
62 mov r0,dpl ; use only low order address
69 ; pointer to xternal data
75 ; pointer to code area
82 ; pointer to xternal stack or pdata
86 mov dph,p2 ; p2 holds high byte for pdata access
103 /* the return value is expected to be in acc/_ap, and not in the standard
104 * location dpl/dph. Therefore we choose return type void here: */
106 _gptrgetWord (unsigned *gptr)
108 gptr; /* hush the compiler */
112 ; depending on the pointer type acc. to SDCCsymt.h
122 dec a ; 4 skip generic pointer
126 ; any other value for type
131 ; Pointer to data space
135 mov r0,dpl ; use only low order address
142 ; pointer to xternal data
151 ; pointer to code area
162 ; pointer to xternal stack