More module splits

git-svn-id: svn://svn.cc65.org/cc65/trunk@393 b7a2c559-68d2-44c3-8de9-860c34a00d81
2000-10-25 19:53:22 +00:00
parent e3a8e6bbe4
commit dd0ddc94e3
25 changed files with 552 additions and 231 deletions
--- a/libsrc/runtime/subysp.s
+++ b/libsrc/runtime/subysp.s
@@ -0,0 +1,28 @@
+;
+; Ullrich von Bassewitz, 25.10.2000
+;
+; CC65 runtime: Decrement the stackpointer by value in y
+;
+
+       	.export	  	subysp
+	.importzp	sp, tmp1
+
+.proc	subysp
+
+	pha			; Save A
+       	sty    	tmp1		; Save the value
+	lda	sp    		; Get lo byte
+	sec
+	sbc	tmp1   	       	; Subtract y value
+	sta	sp  	  	; Put result back
+	bcs	@L1
+	dec	sp+1
+@L1:	pla	   		; Restore A
+	rts			; Done
+
+.endproc
+
+
+
+
+