sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 52 insertions, 0 deletions

diff --git a/device/lib/_decdptr.c b/device/lib/_decdptr.c
new file mode 100644
index 0000000..222846b
--- /dev/null
+++ b/device/lib/_decdptr.c
@@ -0,0 +1,52 @@
+/*-------------------------------------------------------------------------
+   _decdptr.c - decrement dptr by 1
+
+   Copyright (C) 1999, Jean-Louis Vern <jlvern AT gmail.com>
+
+   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.
+-------------------------------------------------------------------------*/
+
+static void
+dummy (void) __naked
+{
+// void _decdptr (char *gptr)
+/* the return value is already in dph/dpl */
+        __asm
+        .globl  __decdptr
+__decdptr:
+
+#ifdef __SDCC_ds390
+        orl     dps, #0xc0
+        inc     dptr
+        anl     dps, #0x3f
+#else
+        xch     a,dpl
+        jnz     00001$
+        dec     dph
+00001$:
+        dec     a
+        xch     a,dpl
+#endif
+        ret
+        __endasm;
+}