Add C callable special multiplication routines.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4440 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/Makefile

@@ -87,7 +87,7 @@ S_OBJS = 	_cwd.o          \
 		_fopen.o	        \
 	 	_heap.o	 	        \
 	       	_heapadd.o 	        \
-                _heapblocksize.o\
+                _heapblocksize.o        \
                 _heapmaxavail.o         \
                 _heapmemavail.o         \
 	 	_oserror.o	        \
@@ -99,7 +99,9 @@ S_OBJS = 	_cwd.o          \
 		atexit.o  	        \
 		atoi.o	  	        \
 		calloc.o  	        \
+                cc65_imul16x16r32.o     \
                 cc65_sincos.o           \
+                cc65_umul16x16r32.o     \
                 chdir.o                 \
 		copydata.o	        \
                 creat.o                 \

libsrc/common/cc65_imul16x16r32.s

@@ -0,0 +1,24 @@
+;
+; Ullrich von Bassewitz, 2010-11-03
+;
+; CC65 library: 16x16 => 32 signed multiplication
+;
+
+        .export         _cc65_imul16x16r32
+        .import         imul16x16r32, popax
+    	.importzp     	ptr1
+
+
+;---------------------------------------------------------------------------
+; 16x16 => 32 signed multiplication routine.
+
+
+.proc   _cc65_imul16x16r32
+
+        sta     ptr1
+        stx     ptr1+1
+        jsr     popax
+        jmp     imul16x16r32
+
+.endproc
+

libsrc/common/cc65_umul16x16r32.s

@@ -0,0 +1,24 @@
+;
+; Ullrich von Bassewitz, 2010-11-03
+;
+; CC65 library: 16x16 => 32 unsigned multiplication
+;
+
+        .export         _cc65_umul16x16r32
+        .import         umul16x16r32, popax
+    	.importzp      	ptr1
+
+
+;---------------------------------------------------------------------------
+; 16x16 => 32 unsigned multiplication routine.
+
+.proc   _cc65_umul16x16r32
+
+        sta     ptr1
+        stx     ptr1+1
+        jsr     popax
+        jmp     umul16x16r32
+
+.endproc
+
+