F1 Z : At[L - Lucent Technologies DSP1617 Information Manual

DSP1611/17/18/27/28/29 DIGITAL SIGNAL PROCESSOR
Instruction Set Summary

F1 Z : aT[l]

(multiply/ALU operation with parallel compound accumulator move) (continued)
5. Write the value saved in the temporary register (temp) to the memory location now pointed to by rM.
6. Postmodify the value of rM using the second action described by the two least significant bits of the Z field.
The available options for the postmodification are specified as follows:
Symbol 2 LSBs of Z
*rMzp 00
*rMpz 01
*rMm2 10
†
*rMjk 11
† Code 11, in this case, means add the current value of the j or k register to rM after accessing *rM.
Bit
15 14
Field 0 0
B-39
First Action
no action (zero)
postincrement (plus)
postdecrement (minus)
postincrement by (j)
13 12 11 10
1 0 1 D
Words: 1
Cycles: 2
Group: Multiply/ALU
Addressing: Register Indirect, Register
Flags affected: LMI, LEQ, LLV, LMV
Interruptible: Yes
Cacheable: Yes
Format: 2a
DRAFT COPY
Second Action
postincrement (plus)
no action (zero)
postincrement by two (+2)
postincrement by (k)
9 8—5
S F1
Information Manual
April 1998
4 3—0
X Z
Lucent Technologies Inc.