/*-------------------------------------------------------------------------
- _gptrput.c :- put value for a generic pointer
+ _gptrput.c :- put value for a generic pointer
Written By - Sandeep Dutta . sandeep.dutta@usa.net (1999)
under the terms of the GNU Library General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
-
+
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Library General Public License for more details.
-
+
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
+
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding!
+ what you give them. Help stamp out software-hoarding!
-------------------------------------------------------------------------*/
-unsigned char _gptrput ()
+/* not all devices use P2 to page pdata memory, therefore __XPAGE was
+ introduced. On some targets __XPAGE itself is a paged SFR so it is
+ not safe for all platforms to set this. Furthermore some targets
+ can be configured to behave differently for movx @dptr vs. movx @Ri
+ (don't drive high byte of address bus for movx @Ri only) */
+#define USE_PDATA_PAGING_REGISTER 0
+
+__sbit __at (0xF7) B_7;
+__sbit __at (0xF6) B_6;
+__sbit __at (0xF5) B_5;
+
+#if defined DSDCC_MODEL_HUGE
+void
+_gptrput (char *gptr, char c) __naked
{
- _asm
- xch a,r0
- push acc
- xch a,r0
- push acc
+/* This is the banked version with pointers up to 22 bits.
+ B cannot be trashed */
+
+ gptr; c; /* hush the compiler */
+
+ __asm
+ ;
+ ; depending on the pointer type according to SDCCsymt.h
+ ;
+ jb _B_7,codeptr$ ; >0x80 code ; 3
+ jnb _B_6,xdataptr$ ; <0x40 far ; 3
+
+ mov dph,r0 ; save r0 independant of regbank ; 2
+ mov r0,dpl ; use only low order address ; 2
+
+ jb _B_5,pdataptr$ ; >0x60 pdata ; 3
+ ;
+ ; store into near/idata space
+ ;
+ mov @r0,a ; 1
+ dataptrrestore$:
+ mov r0,dph ; restore r0 ; 2
+ mov dph,#0 ; restore dph ; 2
+
+ codeptr$:
+ ret ; 1
+ ;
+ ; store into external stack/pdata space
+ ;
+ pdataptr$:
+ movx @r0,a ; 1
+ sjmp dataptrrestore$ ; 2
+ ;
+ ; store into far space
+ ;
+ xdataptr$:
+ mov _P3,b ; 3
+
+ movx @dptr,a ; 1
+ ret ; 1
+
+ ;===
+ ;27 bytes
+ __endasm;
+}
+
+#elif defined DSDCC_MODEL_MEDIUM
+
+void
+_gptrput (char *gptr, char c) __naked
+{
+/* This is the non-banked version with pointers up to 14 bits.
+ Assumes B is free to be used */
+
+ gptr; c; /* hush the compiler */
+
+ __asm
+ ;
+ ; depending on the pointer type according to SDCCsymt.h
+ ;
+ mov b,dph ; 3
+ jb _B_7,codeptr$ ; >0x80 code ; 3
+ jnb _B_6,xdataptr$ ; <0x40 far ; 3
+
+ mov b,r0 ; save r0 independant of regbank ; 2
+ mov r0,dpl ; use only low order address ; 2
+
+ jb _B_5,pdataptr$ ; >0x60 pdata ; 3
+ ;
+ ; store into near/idata space
+ ;
+ mov @r0,a ; 1
+ dataptrrestore$:
+ mov r0,b ; restore r0 ; 2
+
+ codeptr$:
+ ret ; 1
+ ;
+ ; store into external stack/pdata space
+ ;
+ pdataptr$:
+ movx @r0,a ; 1
+ sjmp dataptrrestore$ ; 2
+ ;
+ ; store into far space, max 14 bits
+ ;
+ xdataptr$:
+ ; 0 <= dptr <= 0x3FFF
+ movx @dptr,a ; 1
+ ret ; 1
+ ;===
+ ;25 bytes
+ __endasm;
+}
+
+#else
+
+void
+_gptrput (char *gptr, char c) __naked
+{
+/* This is the new version with pointers up to 16 bits.
+ B cannot be trashed */
+
+ gptr; c; /* hush the compiler */
+
+ __asm
+ ;
+ ; depending on the pointer type according to SDCCsymt.h
+ ;
+ jb _B_7,codeptr$ ; >0x80 code ; 3
+ jnb _B_6,xdataptr$ ; <0x40 far ; 3
+
+ mov dph,r0 ; save r0 independant of regbank ; 2
+ mov r0,dpl ; use only low order address ; 2
+
+ jb _B_5,pdataptr$ ; >0x60 pdata ; 3
+ ;
+ ; store into near/idata space
+ ;
+ mov @r0,a ; 1
+ dataptrrestore$:
+ mov r0,dph ; restore r0 ; 2
+ mov dph,#0 ; restore dph ; 2
+
+ codeptr$:
+ ret ; 1
+ ;
+ ; store into external stack/pdata space
+ ;
+ pdataptr$:
+ movx @r0,a ; 1
+ sjmp dataptrrestore$ ; 2
+ ;
+ ; store into far space
+ ;
+ xdataptr$:
+ movx @dptr,a ; 1
+ ret ; 1
+
+ ;===
+ ;24 bytes
+ __endasm;
+}
+
+#endif
+
+#ifdef SDCC_ds390
+
+void
+_gptrputWord ()
+{
+ __asm
;
; depending on the pointer type acc. to SDCCsymt.h
;
- mov a,b
- jz 00001$ ; 0 near
- dec a
- jz 00002$ ; 1 far
- dec a
- jz 00003$ ; 2 code
- dec a
- jz 00004$
- dec a ; 4 skip generic pointer
- dec a
- jz 00001$ ; 5 idata
- pop acc
- sjmp 00005$
+ jb _B_7,00013$ ; >0x80 code
+ jnb _B_6,00012$ ; <0x40 far
+
+ mov dph,r0 ; save r0 independant of regbank
+ mov r0,dpl ; use only low order address
+
+ jb _B_5,00014$ ; >0x60 pdata
;
; store into near space
;
- 00001$:
- pop acc
- mov r0,dpl
- mov @r0,a
- sjmp 00005$
-
- 00002$:
- pop acc
- movx @dptr,a
- sjmp 00005$
-
- 00003$:
- pop acc ; do nothing
- sjmp 00005$
-
- 00004$:
- pop acc
- mov r0,dpl
- movx @r0,a
- 00005$:
- xch a,r0
- pop acc
- xch a,r0
-_endasm;
+ mov @r0,_ap
+ inc r0
+ mov @r0,a
+ sjmp 00015$
+;
+; store into far space
+;
+ 00012$:
+ xch a,_ap
+ movx @dptr,a
+ inc dptr
+ xch a,_ap
+ movx @dptr,a
+ sjmp 00016$
+;
+; store into code space
+;
+ 00013$:
+ inc dptr ; do nothing
+ sjmp 00016$
+;
+; store into xstack space
+;
+ 00014$:
+ xch a,_ap
+ movx @r0,a
+ inc r0
+ xch a,_ap
+ movx @r0, a
+ 00015$:
+ mov dpl,r0
+ mov r0,dph ; restore r0
+ mov dph,#0 ; restore dph
+ 00016$:
+ __endasm;
}
+
+#endif
projects / fw / sdcc / blobdiff