cc65/libsrc/common/_imul16x16r32.s

26 lines
470 B
ArmAsm

;
; Ullrich von Bassewitz, 2010-11-03
;
; CC65 library: 16x16 => 32 signed multiplication
;
.export _imul16x16r32
.import imul16x16r32, popax
.include "zeropage.inc"
;---------------------------------------------------------------------------
; 16x16 => 32 signed multiplication routine.
.proc _imul16x16r32
sta ptr1
stx ptr1+1
jsr popax
jmp imul16x16r32
.endproc