More module splits

git-svn-id: svn://svn.cc65.org/cc65/trunk@393 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/runtime/incsp2.s

@@ -0,0 +1,44 @@
+;
+; Ullrich von Bassewitz, 25.10.2000
+;
+; CC65 runtime: Increment the stackpointer by 2. For performance reasons,
+; 		this modules does also contain the popax function.
+
+       	.export		popax, incsp2
+	.importzp	sp
+
+; Pop a/x from stack. This function will run directly into incsp2
+
+.proc	popax
+
+	ldy  	#1
+   	lda	(sp),y		; get hi byte
+       	tax	     		; into x
+   	dey
+   	lda	(sp),y		; get lo byte
+
+.endproc
+
+
+
+.proc	incsp2
+
+	ldy	sp		; 3
+       	iny			; 2
+       	beq    	@L1		; 2
+       	iny			; 2
+       	beq	@L2		; 2
+       	sty	sp		; 3
+       	rts
+
+@L1:   	iny			; 2
+@L2:   	sty	sp		; 3
+       	inc	sp+1		; 5
+       	rts
+
+.endproc
+
+
+
+
+