Motorola DSP56301 - Manual (Page 309)

DSP56301 User’s Manual A -13
rep n0
mac x0,x1,a x,l:(r0)+ ;; exercise mac, write x/y ram
else ;; x/y ram not symmetrical
;; write x memory
clr a #start_xram,r0 ;; start of xram
move #>length_xram,n0 ;; length of xram
rep n0
mac x0,y0,a x1,x:(r0)+ ;; exercise mac, write xram
;; write y memory
clr a #start_yram,r1 ;; start of yram
move #>length_yram,n1 ;; length of yram
rep n1
mac x1,y0,a x0,y:(r1)+ ;; exercise mac, write yram
endif
;; write p memory
clr a #start_pram,r2 ;; start of pram
move #>length_pram,n2 ;; length of pram
rep n2
move y0,p:(r2)+ ;; write pram
;; check memory contents
if (EQUALDATA) ;; x/y ram symmetrical
;; check dram
clr a #start_dram,r0 ;; restore pointer, clear a
do n0,_loopd
move x:(r0),a1 ;; a0=a2=0
eor x1,a
add a,b ;; accumulate error in b
move y:(r0)+,a1 ;; a0=a2=0
eor x0,a
add a,b ;; accumulate error in b
_loopd
else ;; x/y ram not symmetrical
;; check xram
clr a #start_xram,r0 ;; restore pointer, clear a
do n0,_loopx
move x:(r0)+,a1 ;; a0=a2=0
eor x1,a
add a,b ;; accumulate error in b
_loopx
;; check yram
clr a #start_yram,r1 ;; restore pointer, clear a
do n1,_loopy
move y:(r1)+,a1 ;; a0=a2=0
eor x0,a
add a,b ;; accumulate error in b
_loopy
endif