sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 75 insertions, 0 deletions

diff --git a/device/lib/pic16/libsdcc/gptr/gptrput2.c b/device/lib/pic16/libsdcc/gptr/gptrput2.c
new file mode 100644
index 0000000..2d62a36
--- /dev/null
+++ b/device/lib/pic16/libsdcc/gptr/gptrput2.c
@@ -0,0 +1,75 @@
+/*-------------------------------------------------------------------------
+   gptrput2.c - put 2 byte value at generic pointer
+
+   Copyright (C) 1999, Sandeep Dutta . sandeep.dutta@usa.net
+   Adopted for pic16 port by Vangelis Rokas, 2004 <vrokas AT otenet.gr>
+
+   This library is free software; you can redistribute it and/or modify it
+   under the terms of the GNU 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License 
+   along with this library; see the file COPYING. If not, write to the
+   Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
+   MA 02110-1301, USA.
+
+   As a special exception, if you link this library with other files,
+   some of which are compiled with SDCC, to produce an executable,
+   this library does not by itself cause the resulting executable to
+   be covered by the GNU General Public License. This exception does
+   not however invalidate any other reasons why the executable file
+   might be covered by the GNU General Public License.
+-------------------------------------------------------------------------*/
+
+/* write address is expected to be in WREG:PRODL:FSR0L while
+ * write value is in TBLPTRH:TBLPTRL:PRODH:[stack] */
+ 
+extern int FSR0H;
+extern int POSTINC0;
+extern int PREINC1;
+extern int PRODH;
+extern int PRODL;
+extern int WREG;
+extern int __eeprom_gptrput2;
+
+void _gptrput2(void) __naked
+{
+  __asm
+    /* decode generic pointer MSB (in WREG) bits 6 and 7:
+     * 00 -> code (unimplemented)
+     * 01 -> EEPROM
+     * 10 -> data
+     * 11 -> data
+     *
+     * address: (WREG, PRODL, FSR0L)
+     * value: (TBLPTRH, TBLPTRL, PRODH, STACK1[+1])
+     */
+    btfss	_WREG, 7
+    bra		_lab_01_
+    
+    /* data pointer  */
+    /* FSR0L is already set up */
+    movff	_PRODL, _FSR0H
+    
+    movff	_PREINC1, _POSTINC0
+    movff	_PRODH, _POSTINC0
+    
+    return
+    
+
+_lab_01_:
+    /* code or eeprom */
+    btfsc	_WREG, 6
+    goto        ___eeprom_gptrput2
+
+    /* code pointer, cannot write code pointers */
+    return
+
+  __endasm;
+}