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COMPARE.MAC
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COMPARE.MAC
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;
; COMPARE.MAC - Comparison Functions
;
; 97/12/28
;
; 0= = 0< 0> < U< > MIN MAX WITHIN D0= D= D0< D< DU<
; DMIN DMAX
;
; 0= ( x -- flag )
hdr 2,'0='
zequ: pop hl
ld a,l
or h
jp z,true
jp false
; = ( x1 x2 -- flag ) - 0=
hdr 1,'='
equal: pop de
pop hl
equal1: call cmpu
jp z,true
jp false
; 0< ( n -- flag )
hdr 2,'0<'
zless: pop hl
zless1: add hl,hl
jp c,true
jp false
; 0> ( n -- flag )
hdr 2,'0>'
zgreat: pop hl
ld a,h
or a
jp m,false
or l
jp nz,true
jp false
; < ( n1 n2 -- flag )
hdr 1,'<'
less: pop de
pop hl
less1: call cmps
jp c,true
jp false
; U< ( u1 u2 -- flag )
hdr 2,'U<'
uless: pop de
pop hl
uless1: call cmpu
jp c,true
jp false
; > ( n1 n2 -- flag )
hdr 1,'>'
great: pop hl
pop de
call cmps
jp c,true
jp false
; MIN ( n1 n2 -- n1 | n2 ) 2dup > if swap then drop
hdr 3,'MIN'
min: pop de
pop hl
call cmps
jp max1
; MAX ( n1 n2 -- n1 | n2 ) 2dup < if swap then drop
hdr 3,'MAX'
max: pop de
pop hl
call cmps
ex de,hl
max1: jp c,hpush
ex de,hl
jp hpush
; WITHIN ( n1 n2 n3 -- flag ) over - >r - r> u<
hdr 6,'WITHIN' ; ANS
within: pop hl
pop de
call ssub
ex (sp),hl
call ssub
pop de
jp uless1
; D0= ( d -- flag ) or 0=
hdr 3,'D0='
dzequ: call docol
dw orr,zequ
dw exit
; D= ( d1 d2 -- flag )
hdr 2,'D='
dequ: pop de
pop hl
ex (sp),hl
call cmpu
pop de
pop hl
jp nz,false
jp equal1
; D0< ( d -- flag ) swap drop 0<
hdr 3,'D0<' ; ANS
dzle: pop hl
pop de
jp zless1
; D< ( d1 d2 -- flag ) rot 2dup = if 2drop u< exit then 2swap 2drop >
hdr 2,'D<'
dless: pop de
pop hl
ex (sp),hl
call cmpu
jp z,uless
inc sp
inc sp
inc sp
inc sp
jp less1
; DU< ( ud1 ud2 -- flag ) rot swap 2dup u< if 2drop 2drop -1 exit
; then - if 2drop 0 exit then u<
hdr 3,'DU<'
dules: pop de
pop hl
ex (sp),hl
call cmpu
pop de
pop hl
jp c,true
jp nz,false
jp uless1
; DMIN ( d1 d2 -- d1 | d2 ) 2over 2over d< 0= if 2swap then 2drop
hdr 4,'DMIN'
dmin: call docol
dw tover,tover
dw dless,zequ
dmin1: dw zbran,dmin2
dw tswap
dmin2: dw tdrop
dw exit
; DMAX ( d1 d2 -- d1 | d2 ) 2over 2over d< if 2swap then 2drop
hdr 4,'DMAX'
dmax: call docol
dw tover,tover
dw dless
dw bran,dmin1
; end