Motorola DSP96002 - Manual (Page 848)

66 MOTOROLA
PLOCKR Program-Cache-Sector PLOCKR
Relative Lock
00 0000 0aaa aaaa
31 14 13 0
0000 0011 10aa aaaa aa
Operation:
Lock sector by PC + xx
Lock sector by PC + xxxx
Lock sector by PC + Rn
Assembler Syntax:
PLOCKR label
PLOCKR Rn
Description:
Lock the cache sector to which the sum PC + specified displacement belongs. If the sum does not belong
to any cache sector, then load the least recently used cache sector tag with the 25 most significant bits of
the sum and then lock that cache sector. Update the LRU stack accordingly.
The displacement is a 2’s complement 32-bit integer that represents the relative distance from the current
PC to the address to be locked. Short Displacement, Long Displacement and Address Register PC Relative
addressing modes may be used. The Short Displacement 15-bit data is sign extended to form the 32-bit
PC Relative Displacement.
The PLOCKR instruction is enabled only in Cache Mode. In PRAM Mode it will cause an illegal instruction
trap to be taken.
CCR Condition Codes: Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: PLOCKR label (short)
00 0000 0000 0000
31 14 13 0
PC RELATIVE DISPLACEMENT
0000 0011 0000 1000 00
Instruction Format: PLOCKR label
00 0000 0000 0000
31 14 13 0
0000 0011 0000 001R RR
Instruction Format: PLOCKR Rn