Stereo System User Manual

MOTOROLA DSP96002 USER’S MANUAL B-119
fmpy.x d4,d4,d4 ;scale power 1 1
pwr --- ---
Totals: 7 100
Power Function X
**
Y
X = Single Precision Float, Y = 32 Bit Unsigned Integer
Program ICycles
Words
;
; d1.s = d4.s
**
d0.l
;
bfind d0,d0 #32,d2.l ;how many bits 2 2
move d0.h,d3.l 1 1
sub d3,d2 #1.0,d1.s ;initialize power 2 2
do d2.l,pwr 2 3
lsr d0 ;get lsb 1 1
fmpy.x d1,d4,d1 ifcs ;multiply if bit set 1 1
fmpy.x d4,d4,d4 ;scale power 1 1
pwr --- ---
Totals: 10 3N+8
where N is the bit position of the most significant "one" bit in Y
plus 1.
Power Function X
**
Y
X = Single Precision Float, Y = Single Precision Float
Program ICycles
Words
logc
dc 0.6681523e-02 ;
**
8
dc -0.6736254e-01 ;
**
7
dc 0.2584541e+00 ;
**
6
dc -0.3676691e+00 ;
**
5
dc -0.4461204e+00 ;
**
4
dc 0.2740512e+01 ;
**
3
dc -0.5236615e+01 ;
**
2
dc 0.6184454e+01 ;
**
1
dc -0.3072334e+01 ;
**
0
expc
dc -0.5770606e-03 ;
**
8