sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 92 insertions, 0 deletions

diff --git a/device/lib/pic16/libsdcc/gptr/gptrget2.c b/device/lib/pic16/libsdcc/gptr/gptrget2.c
new file mode 100644
index 0000000..4fd7b05
--- /dev/null
+++ b/device/lib/pic16/libsdcc/gptr/gptrget2.c
@@ -0,0 +1,92 @@
+/*-------------------------------------------------------------------------
+   gptrget2.c - get 2 byte value from 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.
+-------------------------------------------------------------------------*/
+
+/* the return value is expected to be in (FSR0H, PRODH, PRODL, WREG),
+ * therefore we choose return type void here. Generic pointer is expected
+ * to be in (WREG, PRODL, FSR0L), so function arguments are void, too */
+
+extern int POSTINC0;
+extern int INDF0;
+extern int FSR0L;
+extern int FSR0H;
+extern int WREG;
+extern int TBLPTRL;
+extern int TBLPTRH;
+extern int TBLPTRU;
+extern int TABLAT;
+extern int PRODL;
+extern int __eeprom_gptrget2;
+
+void _gptrget2(void) __naked
+{
+  __asm
+    /* decode generic pointer MSB (in WREG) bits 6 and 7:
+     * 00 -> code
+     * 01 -> EEPROM
+     * 10 -> data
+     * 11 -> data
+     *
+     * address in (WREG, PRODL, FSR0L)
+     * result in (FSR0L, PRODH, PRODL, WREG)
+     */
+    btfss	_WREG, 7, 0
+    bra		_lab_01_
+    
+    /* data pointer  */
+    /* FSR0L is already set up */
+    movff	_PRODL, _FSR0H
+    
+    movf	_POSTINC0, 0, 0
+    movff	_POSTINC0, _PRODL
+    
+    return
+    
+
+_lab_01_:
+    /* code or eeprom */
+    btfsc	_WREG, 6, 0
+    goto        ___eeprom_gptrget2
+    
+    ; code pointer
+    movff	_FSR0L, _TBLPTRL    
+    movff	_PRODL, _TBLPTRH
+    movwf	_TBLPTRU, 0
+    
+    /* fetch first byte */
+    TBLRD*+
+    movf	_TABLAT, 0, 0
+
+    /* fetch second byte  */
+    TBLRD*+
+    movff	_TABLAT, _PRODL
+    
+    return 
+
+  __endasm;
+}