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cc65/libsrc/runtime/pushwsp.s
cuz 56350d81e0 Fixed a bug in pushw0sp
git-svn-id: svn://svn.cc65.org/cc65/trunk@1604 b7a2c559-68d2-44c3-8de9-860c34a00d81
2002-11-23 16:21:35 +00:00

32 lines
450 B
ArmAsm

;
; Ullrich von Bassewitz, 24.10.2001
;
; CC65 runtime: Load word from stack slot and push
;
.export pushwysp, pushw0sp
.importzp sp
.macpack generic
pushw0sp:
ldy #3
pushwysp:
lda sp ; 3
sub #2 ; 4
sta sp ; 3
bcs @L1 ; 3(+1)
dec sp+1 ; (5)
@L1: lda (sp),y ; 5 =16
tax ; 2
dey ; 2
lda (sp),y ; 5
ldy #$00 ; 2
sta (sp),y ; 5
iny ; 2
txa ; 2
sta (sp),y ; 5
rts