Motorola DSP96002 User Manual page 637

move
B.1.49 Power Function X ** Y
X = Single Precision Float, Y = 5 Bit Integer
;
; d1.s = d4.s ** d0.l
;
andi
move
or
move
fmpy.x
fmpy.x
fmpy.x
fmpy.x
fmpy.x
fmpy.x
fmpy.x
fmpy.x
fmpy.s
X = Single Precision Float, Y = 32 Bit Unsigned Integer
;
; d1.s = d4.s ** d0.l
;
move
do
lsr
fmpy.x
B-118
fsub.s d2,d3
d3.s,x:(r1)+
Power Function X ** Y
#0,ccr
sr,d3.l
d0,d3 #1.0,d1.s
d3.l,sr
d1,d4,d1 ifcs ;bit 0, carry
d4,d4,d4 ifal ;do multiply w/o ccr update
d1,d4,d1 ifvs ;bit 1, overflow
d4,d4,d4 ifal ;do multiply w/o ccr update
d1,d4,d1 ifeq ;bit 2, zero
d4,d4,d4 ifal ;do multiply w/o ccr update
d1,d4,d1 ifmi ;bit 3, negative
d4,d4,d4 ifal ;do multiply w/o ccr update
d1,d4,d1 ffinf ;bit 4, infinity
Power Function X ** Y
#1.0,d1.s
#32,pwr
d0
d1,d4,d1 ifcs
DSP96002 USER'S MANUAL
;clear ccr bits
;get sr
;set ccr bits
;move power to CCR bits
Totals:
;initialize power
;get lsb
;multiply if bit set
; 1 1
;cz 1 1
--- ---
Totals: 10 10
Program ICycles
Words
1 1
1 1
2 2
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
--- ---
14 14
Program ICycles
Words
2 2
2 3
1 1
1 1
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