LCW
LOAD COMPLEMENT WORD
0/Vord
index
alignment)
LOAD COMPLEMENT WORD loads the
32-bit
two's
com-
plement
of
the
effective
word into
register
R.
Fixed-point
overflow
occurs
if
the
effective
word is
-2
31
(X'80000000')
in
which
case
the
result in
register
R
is
-2
31
and
CC2
is
set
to
1;
otherwise,
CC2 is
reset
to
O.
Affected:
(R),CC2,CC3,CC4 Trap:
Fixed-pointoverflow.
-EW-R
Condition
code
settings:
2 3
4 Result in R
-
0 0 0
Zero
- 0
Negative
- 0 0 Positive
-
0
No
fixed-point
overflow
o
Fixed-point
overflow
If
CC2
is
set
to
1 and
the
fixed-point
arithmetic
trap
mask
(AM) is a
1,
the
BP
traps
to
location
X'43'
after
execution
of
LOAD COMPLEMENT WORD;
otherwise,
the
BP
ex-
ecutes
the
next
instruction in
sequence.
LAW
LOAD ABSOLUTE WORD
0/Vord
index
alignment)
If
the
effective
word
is
positive,
LOAD
ABSOLUTE
WORD
!oads
the
effective
v.'ord
into regi$ter
R.
If
the
effective
word is
negative,
LAW
loads the
32-bit
two's complement
of
the
effective
word
into
register
R.
Fixed-point
overflow
occurs
if
the
effective
word is
-~
1
(X'80000000'),
in
which
case
the result in
register
R is _2
31
, and CC2
is
set
to
1;
otherwise,
CC2 is
reset
to
O.
Affected:
(R),CC2,CC3,CC4 Trap:
Fixed-point
overflow
IEWI-R
Condition
code
settings:
2 3
4
Resu
I
tin
R
-
0 0
0
Zero
0
Nonzero
-
0 No
fixed-point
overflow
0
Fixed-point
overflow (sign
bit
on)
52
Load/Store Instructions
If
CC2
is
set
to
1 and
the
fixed-point
arithmetic
trap
mask
(AM)
is
a 1,
the
BP
traps
to
location
X'43'
after
execution
of
LOAD ABSOLUTE WORD;
otherwise,
the
BP
executes
the
next
instruction in
sequence.
LCD
LOAD COMPLEMENT DOUBLEWORD
(Doubleword
index
alignment)
LOAD COMPLEMENT DOUBLEWORD forms
the
64-bit
two's
complement
of
the
effective
doubleword, loads
the
32
low-order
bits
of
the
resu It into
register
Ru
1,
and
then
loads
the
32
high-order
bits
of
the
result
into
register
R.
If R is an odd
value,
the
result in
register
R is the
32
high-
order
bits
of
the
two's
complemented doubleword. The
con-
dition
code
settings
are
based on
the
two's complement
of
the
effective
doubleword,
rather
than
the
final result in
register
R.
Fixed-point
overflow
occurs
if
the
effective
doubleword is
_~3
(X'8000000000000000'), in
which
case
the result in
registers
Rand
Ru1
is
_~3
and
CC2
is
set
to
1;
otherwise,
CC2
is
reset
to
O.
Affected:
(R),(Rul),CC2, Trap:
Fixed-point
overflow
CC3,CC4
[-ED]32_63 -
Ru1;
[-ED]
0-31-
R
Condition
code
settings:
2 3
4 Two's complement
of
effective
doubleword
-
0 0 0 Zero
-
0
Negative
- 0 0 Positive
- 0
No
fixed-point
overflow
o
Fixed-point
overflow
If
CC2
is
set
to
1
and
the
fixed-point
arithmetic
trap mask
(AM) is a
1,
the
BP
traps
to
location
X'43'
after
execution
of
LOAD COMPLEMENT DOUBLEWORD;
otherwise,
the
BP
executes
the
next
instruction in
sequence.
Example 1,
even
R
field
value:
ED
(R)
(Ru
1)
CC
Before
executi
on
",,,,,.,,"'
A
t=,""'nn
A
n""~""r-'
-
/\
VIL..J"t..JU/07t-\O\...LJLr
xxxxxxxx
xxxxxxxx
xxxx
After
execution
·V"""I')AC:1.70nfl
nr"l"'\cr:'
/\
I
VL..J"t.JVI
U 7
,...,1)
.....
L..I1..1
X'FEDCBA98'
X'765432 1
l'
xOOl
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