few 6502 and some 65SC02 optimizations

2017-03-12 23:21:43 +01:00
parent 0ec4534bd6
commit 0de44517ac
23 changed files with 272 additions and 78 deletions
--- a/libsrc/runtime/lsave.s
+++ b/libsrc/runtime/lsave.s
@@ -1,5 +1,6 @@
 ;
 ; Ullrich von Bassewitz, 08.08.1998
+; Christian Krueger, 11-Mar-2017, optimization
 ;
 ; CC65 runtime: save ax into temp storage/restore ax from temp storage
 ;
@@ -10,11 +11,10 @@
 saveeax:
        sta     regsave
        stx     regsave+1
-        lda     sreg
-        sta     regsave+2
-        lda     sreg+1
-        sta     regsave+3
-        lda     regsave
+        ldy     sreg
+        sty     regsave+2
+        ldy     sreg+1
+        sty     regsave+3
        rts

 resteax: