Merge branch 'master' into popptr1

2018-05-21 13:33:14 +02:00
parent 839aa93198 a795a27689
commit 32bbacbb78
321 changed files with 9563 additions and 2667 deletions
--- a/libsrc/runtime/incaxy.s
+++ b/libsrc/runtime/incaxy.s
@@ -1,7 +1,7 @@
 ;
 ; Ullrich von Bassewitz, 05.08.1998
 ;
-; CC65 runtime: Increment ax by valie in y
+; CC65 runtime: Increment ax by value in y
 ;

        .export         incaxy, incax4
--- a/libsrc/runtime/incsp2.s
+++ b/libsrc/runtime/incsp2.s
@@ -2,7 +2,7 @@
 ; Ullrich von Bassewitz, 25.10.2000
 ;
 ; CC65 runtime: Increment the stackpointer by 2. For performance reasons,
-;               this modules does also contain the popax function.
+;               this module also contains the popax function.

        .export         popax, incsp2
        .importzp       sp
--- a/libsrc/runtime/jmpvec.s
+++ b/libsrc/runtime/jmpvec.s
@@ -1,7 +1,7 @@
 ;
 ; Ullrich von Bassewitz, 2002-12-26
 ;
-; CC65 runtime: Jump vector that resides in the data segment so it's address 
+; CC65 runtime: Jump vector that resides in the data segment so its address
 ; may be patched at runtime.
 ;

--- a/libsrc/runtime/ldec.s
+++ b/libsrc/runtime/ldec.s
@@ -1,5 +1,6 @@
 ;
-; Ullrich von Bassewitz, 29.12.1999
+; Piotr Fusik, 09.03.2018
+; originally by Ullrich von Bassewitz
 ;
 ; CC65 runtime: Decrement eax by value in Y
 ;
@@ -11,16 +12,25 @@ deceaxy:
        sty     tmp1
        sec
        sbc     tmp1
-        sta     tmp1
-        txa
-        sbc     #0
-        tax
-        lda     sreg
-        sbc     #0
-        sta     sreg
-        lda     sreg+1
-        sbc     #0
-        sta     sreg+1
-        lda     tmp1
-        rts
+        bcs     @L9
+
+; Borrow from X.
+
+        dex
+        cpx     #$FF
+        bne     @L9
+
+; X wrapped from zero to $FF, borrow from sreg.
+
+        dec     sreg
+        cpx     sreg
+        bne     @L9
+
+; sreg wrapped from zero to $FF, borrow from sreg+1.
+
+        dec     sreg+1
+
+; Done.
+
+@L9:    rts

--- a/libsrc/runtime/mulax3.s
+++ b/libsrc/runtime/mulax3.s
@@ -1,7 +1,7 @@
 ;
 ; Ullrich von Bassewitz, 04.10.2001
 ;
-; CC65 runtime: Multiply the primary register
+; CC65 runtime: Multiply the primary register by 3
 ;

        .export         mulax3
--- a/libsrc/runtime/mulax5.s
+++ b/libsrc/runtime/mulax5.s
@@ -1,7 +1,7 @@
 ;
 ; Ullrich von Bassewitz, 04.10.2001
 ;
-; CC65 runtime: Multiply the primary register
+; CC65 runtime: Multiply the primary register by 5
 ;

        .export         mulax5