Sony CXD2701Q Data Book page 149

SONY*
CXD1 160AP-A0
Jump
system
command
Jump commands
for
the instruction
address
include: conditional
jump,
unconditional
jump and sub
routine
call.
They
all
jump
to
addresses expressed
in 6bit
and
containing
an
A.
A-Z2X
63£A iO
Sub
routine
call
and
loop
jump can
stack instruction
address
They
are
formed by a 2-address FILO and can execute up
to
a double
oonbination.
When
stack performs a forced
address jump,
it
also
keeps
the
previous
condition.
(1)
Conditional
jump
JP(F)
AS A4 A3 A2 Al AO
;
14 13 12 II 10
IS 14 \3 12
in no
15 14
19
18 111
110
1
115 114 113
Li
When
the condition
is
met,
the following
command
executes
the
command
of
the
address
ahead
of
the
jump.
When
the condition
is
not
met, the
command
after
that
executes
the
command
of
the
address
in
the
order.
112
111 110
Flag
Conditions
L L L Zero Results
of
previous
commands
Acc=0
L L
H
Non
zero Results
of
previous
commands
Acc=0
L
H
L
Plus
Results
of
previous
commands
AccSO
L
H H
Minus Results
of
previous
commands
Aco<0
H
L
L Over
flow Results
of
previous
commands
Acc£1
or
Acc<-1
H
L
H
BSQ
Barrel shifter
operation
command
{positive
value
floating-point
type conversion)
up
to
the previous
command
is
odd
numbered
shift
bit
H H
L
(keep)
1
Actually
same
value
as
unconditional
J
jump
H
H
H
(keep)
(2)
Non
conditional
jump
JMP
115 114 113
H
L
H
H H
L
112
*
Below zero and
Non
zero cannot
be used
Hcc+P
-*Ace
Ace—
4P-»Acc
Acc
+
R
-Ace Acc
+
4R^Acc
I
Elements from
this
command,
execute
the
command
of
the
address ahead
of
the jump,
unconditionally
(3)
Sub
routine
call
CAL
Return
RTN
115 114 113 [12
H
L
H
H
H L
H
H
115
115
111 110
15 14
L
H L
This
command
executes
the
command
of
address
ahead
of
the
jump
for
the
sub
routine.
Also
it
pushes
to
the
stack the
address
following this
command.
Next
this
command
pops
out the
address from the stack
and executes the
command
of that
address.
145
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