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cc65/libsrc/runtime/mulax6.s
cuz 854f23e945 Added a few more specialized multiply routines
git-svn-id: svn://svn.cc65.org/cc65/trunk@1193 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-03-16 20:27:50 +00:00

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299 B
ArmAsm

;
; Ullrich von Bassewitz, 16.03.2002
;
; CC65 runtime: Multiply the primary register
;
.export mulax6
.importzp ptr1
.proc mulax6
sta ptr1
stx ptr1+1
asl a
rol ptr1+1
clc
adc ptr1
pha
txa
adc ptr1+1
sta ptr1+1
pla
asl a
rol ptr1+1
ldx ptr1+1
rts
.endproc