6809: implement * and : operators

include/m6809/m6809_math.mfk

@@ -0,0 +1,30 @@
+
+#if not(ARCH_6809)
+#warn m6809_math module should be used only on 6809-like targets
+#endif
+
+noinline asm word __mul_u16u16u16(word register(x) x, word register(d) d) {
+    pshs d,x
+    exg d,x
+    lda ,s
+    mul
+    tfr d,x
+    ldd 1,s
+    mul
+    abx
+    tfr x,d
+    tfr b,a
+    ldb #0
+    tfr d,x
+    puls d
+    lda 1,s
+    mul
+    leax d,x
+    tfr x,d
+    leas 2,s
+    rts
+}
+
+noinline asm word __divmod_u16u16u16u16(word register(x) x, word register(d) d) {
+
+}

include/m6809/stdlib_6809.mfk

@@ -4,6 +4,8 @@
 #warn stdlib_6809 module should be only used on 6809-compatible targets
 #endif
 
+import m6809/m6809_math
+
 word nmi_routine_addr   @$FFFC
 word reset_routine_addr @$FFFE
 word irq_routine_addr   @$FFF8