PNX1300 Philips, PNX1300 Datasheet - Page 453

• Manufacturer Part Number: PNX1300
• Description: Media Processors
• Manufacturer: Philips

PNX1300/01/02/11 Data Book
readdpc
SYNTAX
FUNCTION
DESCRIPTION
execution of the interrupted program can be resumed by jumping to the value contained in DPC. This operation can be
used to save state before idling a task in a multi-tasking environment.
modification of the destination register. If the LSB of rguard is 1, rdest is written; otherwise, rdest is unchanged.
EXAMPLES
A-155
DPC = 0xbeebee
r20 = 0, DPC = 0xabba
r21 = 1, DPC = 0xabba
The
Interruptible jumps write their target address to the DPC. If an interrupt or exception is taken at an interruptible jump,
The
[ IF rguard ] readdpc
if rguard then {
}
rdest
readdpc
readdpc
Initial Values
DPC
writes the current value of the DPC (Destination Program Counter) processor register to r dest.
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
PRELIMINARY SPECIFICATION
readdpc
IF r20 readdpc
IF r21 readdpc
rdest
Operation
r100
r101
r102
Read destination program counter
r100
no change, since guard is false
r102
0xbeebee
0xabba
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
writedpc readspc ijmpf
Philips Semiconductors
Result
ijmpi ijmpt
ATTRIBUTES
SEE ALSO
fcomp
156
No
—
0
1
3