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/memcmp.s
+++ b/libsrc/common/memcmp.s
@@ -5,7 +5,7 @@
 ;

        .export         _memcmp
-        .import         popax, return0
+        .import         popax, popptr1, return0
        .importzp       ptr1, ptr2, ptr3

 _memcmp:
@@ -24,14 +24,12 @@ _memcmp:
        jsr     popax           ; Get p2
        sta     ptr2
        stx     ptr2+1
-        jsr     popax           ; Get p1
-        sta     ptr1
-        stx     ptr1+1
+        jsr     popptr1         ; Get p1

 ; Loop initialization

+        ;ldy     #$00           ; Initialize pointer (Y=0 guaranteed by popptr1)
        ldx     ptr3            ; Load low counter byte into X
-        ldy     #$00            ; Initialize pointer

 ; Head of compare loop: Test for the end condition