Lucent Technologies DSP1611, Information Manual, Page: 399 / 443

Information Manual DSP1611/17/18/27/28/29 DIGITAL SIGNAL PROCESSOR
April 1998 Instruction Set Summary
Lucent Technologies Inc.
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B-18
if CON F2
(if CONdition is true, then perform special function instruction)
test CONdition;
if true, then perform F2
The specified condition is tested. If it is true, the special function operation F2 is performed. (See Table B-1 on
page B-3 for the conditions that can be tested, i.e., encoded in the CON field). The F2 functions can also be per-
formed unconditionally, i.e., written by themselves and encoded as a condition of true.
The F2 functions that can be conditionally performed, i.e., encoded in the F2 field, are as follows:
Note: The D and S fields are used to specify aD and aS.
F2 Operation F2 Operation
0000 aD = aS >> 1 1000 aD = p
0001 aD = aS << 1 1001 aDh = aSh + 1
0010 aD = aS >> 4 1010 aS = ~aS
0011 aD = aS << 4 1011 aD = rnd(aS)
0100 aD = aS >> 8 1100 aD = y
0101 aD = aS << 8 1101 aD = aS + 1
0110 aD = aS >> 16 1110 aD = aS
0111 aD = aS << 16 1111 aD = –aS
Bit 15 14 13 12 11 10 9 8—5 4—0
Field
1 0 0 1 1 D S F2 CON
Words: 1
Cycles: 1
Group: Special Function
Addressing: Register
Flags affected: LMI, LEQ, LLV, LMV
Interruptible: Yes
Cacheable: Yes
Format: 3