Motorola DSP96002 User Manual page 887

PUNLOCKR
Operation:
Unlock sector by PC + xx
Unlock sector by PC + xxxx
Unlock sector by PC + Rn
Description:
Unlock the cache sector to which the sum PC + specified displacement belongs. If the sum does not belong
to any cache sector, and is therefore definitely unlocked, nevertheless, load the least recently used cache
sector tag with the 25 most significant bits of the sum. 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 PUNLOCKR instruction is enabled only in Cache Mode. In PRAM Mode it will cause an illegal instruc-
tion trap to be taken.
CCR Condition Codes: Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: PUNLOCKR
31
0000 0011
Instruction Format: PUNLOCKR
31
0000 0011
Instruction Format: PUNLOCKR
31
0000 0011
16
Program-Cache-Sector
Relative Unlock
label (short)
11aa aaaa
label
0100 1000
PC RELATIVE DISPLACEMENT
Rn
0100 001R
Assembler Syntax:
PUNLOCKR label
PUNLOCKR Rn
14 13
aa 00 0000
14 13
00 00 0000
14 13
RR 00 0000
PUNLOCKR
0aaa aaaa
0000 0000
0000 0000
MOTOROLA
0
0
0