NonStop S-Series Server Description Manual (G06.27+)

TNS Instruction Set Definition
HP NonStop S-Series Server Description Manual—520331-004
C-27
Instruction Definitions
0 0 0 3 0 5 ECMP extended compare
V := 0;
if H.<0> <> D.<0> then
cc(H:D)
else
{sign:=H.<0>;
H.<0>:=D.<0>:=0;
t1:=exponent(E);
t2:=exponent(A);
if t1<>t2 then
if sign=0 then
cc(t1:t2)
else cc(t2:t1)
else
if sign=0 then
cc(HGFE:DCBA)
else cc(DCBA:HGFE)}
0 0 0 3 0 6 CDF convert double to floating
V := 0;
sign:=B.<0>; exp:=31+256;
if sign=1 then BA:=-BA;
if BA<>0 then
{norm(BA);
exponent(A):=exp;
B.<0>:=sign}
0 0 0 3 0 7 CDI convert double to integer
V := 0;
if B+A.<0> <> 0 then V:=1
else V:=0;
B:=A;
RP:=RP-1
0 0 0 3 1 0 CFIR convert floating to integer with rounding
V := 0;
t:=15+256-exponent(A);
sign:=B.<0>;
if -2**15 <= BA <= 2**15-1
then {B.<0>:=1;
BA:=BA'>>'t;
BA:=BA'+'%100000;
if sign=1 then B:=-B
else if B.<0>=1 then
V:=1}
else V:=1;
cc(B); RP:=RP-1
0 0 0 3 1 1 CFI convert floating to integer
V := 0;
t:=15+256-exponent(A);
sign:=B.<0>;
if -2**15 <= BA <= 2**15-1
then {B.<0>:=1;
BA:=BA'>>'t;
if sign=1 then B:=-B}
else V:=1;
cc(B); RP:=RP-1
Table C-2. Instruction Definitions (page17of38)