Motorola DSP96002 - Manual (Page 666)

MOTOROLA DSP96002 USER’S MANUAL B-147
move #ninf,d0.s ;set -infinity result 2 2
ori #2,er ;set DZ in ER 1 1
ori #2,ier ;set DZ in IER 1 1
jmp _done ;done 2 2
_notzero
getexp d1,d0 #-126,d3.l ;get exponent 2 2
cmp d3,d0 ;cmp to SP exp min 1 1
tfr d3,d0 iflt ;limit if denorm 1 1
float.s d0 ;convert to SP FP 1 1
_done --- ---
Totals: 18 *
Execution Time:
Nan 4
Infinity 7
Zero 16
In-range 15
B.3.5 Nextafter(x,y)
Nextafter(x,y) returns the next representable neighbor of x in the direction toward y. The following special
cases arise: if x=y, then the result is x without any exception being signaled; otherwise, if either x or y is a
quiet NaN, then the result is one or the other input NaNs. Overflow is signaled when x is finite but nex-
tafter(x,y) is infinite; underflow is signaled when nextafter(x,y) lies strictly between +/-2**(Emin); in both
cases, inexact is signaled.
The x argument of the nextafter(x,y) must be a single precision number and not a single-extended number.
This is an arithmetic function.