Added "popptr1" which is of common use to save some bytes.

2018-05-20 15:30:18 +02:00
parent 3a6430b13d
commit c95ed4b8b5
35 changed files with 113 additions and 151 deletions
--- a/libsrc/common/_swap.s
+++ b/libsrc/common/_swap.s
@@ -5,7 +5,7 @@
 ;

        .export         __swap
-        .import         popax
+        .import         popax, popptr1
        .importzp       ptr1, ptr2, ptr3


@@ -19,13 +19,11 @@ __swap: eor     #$FF
        sta     ptr2
        stx     ptr2+1

-        jsr     popax           ; Get p
-        sta     ptr1
-        stx     ptr1+1
+        jsr     popptr1         ; Get p

 ; Prepare for swap

-        ldy     #$00
+        ; ldy     #$00          is guaranteed by popptr1

 ; Swap loop