44 lines
540 B
ArmAsm
44 lines
540 B
ArmAsm
.define .xor
|
|
.sect .text
|
|
.sect .rom
|
|
.sect .data
|
|
.sect .bss
|
|
.sect .text
|
|
|
|
|
|
! Any size exclusive-or.
|
|
! Expects: size in de-registers
|
|
! operands on stack
|
|
! Yields: result on stack
|
|
|
|
.xor: pop h
|
|
shld .retadr
|
|
mov h,b
|
|
mov l,c
|
|
shld .bcreg
|
|
|
|
lxi h,0
|
|
dad sp
|
|
mov c,l
|
|
mov b,h !now bc points to top of first operand
|
|
dad d !and hl points to top of second operand
|
|
push h !this will be the new stackpointer
|
|
1: ldax b
|
|
xra m
|
|
mov m,a
|
|
inx h
|
|
inx b
|
|
dcx d
|
|
mov a,e
|
|
ora d
|
|
jnz 1b
|
|
|
|
pop h
|
|
sphl
|
|
|
|
lhld .bcreg
|
|
mov b,h
|
|
mov c,l
|
|
lhld .retadr
|
|
pchl
|