File: mulax10.s

package info (click to toggle)
cc65 2.19-2
  • links: PTS
  • area: main
  • in suites: forky, sid, trixie
  • size: 20,268 kB
  • sloc: ansic: 117,151; asm: 66,339; pascal: 4,248; makefile: 1,009; perl: 607
file content (32 lines) | stat: -rw-r--r-- 513 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
;
; Piotr Fusik, 24.10.2003
; originally by Ullrich von Bassewitz
;
; CC65 runtime: Multiply the primary register by 10
;

        .export         mulax10
        .importzp       ptr1

.proc   mulax10

        sta     ptr1
        stx     ptr1+1
        asl     a
        rol     ptr1+1
        asl     a
        rol     ptr1+1
        clc
        adc     ptr1
        sta     ptr1
        txa
        adc     ptr1+1
        asl     ptr1
        rol     a
        tax
        lda     ptr1
        rts

.endproc