Code review adaptations, removed "cc65_" prefix from functions

2019-03-29 22:36:01 +01:00
parent 435f417c64
commit 3d8c3a4948
21 changed files with 107 additions and 148 deletions
--- a/libsrc/common/idiv32by16r16.s
+++ b/libsrc/common/idiv32by16r16.s
@@ -0,0 +1,39 @@
+;
+; Ullrich von Bassewitz, 2009-11-04
+;
+; CC65 library: 32by16 => 16 signed division
+;
+
+        .export         _idiv32by16r16
+        .import         idiv32by16r16, incsp4
+
+        .include        "zeropage.inc"
+
+
+;---------------------------------------------------------------------------
+; 32by16 division.
+
+.proc   _idiv32by16r16
+
+        pha                     ; Save rhs
+
+; Copy from stack to zeropage. This assumes ptr1 and ptr2 are adjacent.
+
+        ldy     #3
+@L1:    lda     (sp),y
+        sta     ptr1,y
+        dey
+        bpl     @L1
+
+        lda     #4
+        clc
+        adc     sp
+        sta     sp
+        bcc     @L2
+        inc     sp+1
+
+@L2:    pla                     ; Old rhs
+        jmp     idiv32by16r16
+
+.endproc
+