PNX1302EH NXP Semiconductors, PNX1302EH Datasheet - Page 455

• Manufacturer Part Number: PNX1302EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1302EH

• Lead Free Status / RoHS Status: Not Compliant

PNX1300/01/02/11 Data Book
readspc
SYNTAX
FUNCTION
DESCRIPTION
writes its target address to SPC. The value of SPC allows an exception-handling routine to determine the start
address of the block of scheduled code (called a decision tree) that was executing before the exception was
taken.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-157
SPC = 0xbeebee
r20 = 0, SPC = 0xabba
r21 = 1, SPC = 0xabba
The
An interruptible jump that is not interrupted (no NMI, INT, or EXC event was pending when the jump was executed)
The
[ IF rguard ] readspc → rdest
if rguard then {
}
rdest ← SPC
readspc
readspc
Initial Values
writes the current value of the SPC (Source Program Counter) processor register to rdest.
operation optionally takes a guard, specified in rguard. If a guard is present, its LSB controls the
PRELIMINARY SPECIFICATION
readspc → r100
IF r20 readspc → r101
IF r21 readspc → r102
Operation
Read source program counter
r100 ← 0xbeebee
no change, since guard is false
r102 ← 0xabba
Function unit
Operation code
Number of operands
Modifier
Modifier range
Latency
Issue slots
writespc readdpc ijmpf
Philips Semiconductors
Result
ijmpi ijmpt
ATTRIBUTES
SEE ALSO
fcomp
157
No
—
0
1
3