Motorola DSP96002 - Manual (Page 637)

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