Absolute Value - Analog Devices adsp-2100 Manual

AMF = 11011 for NOT xop operation.
Z: Destination register
Xop: X operand
Syntax:
[ IF cond ]
Permissible xops
AX0 MR2
AX1 MR1
AR MR0
SR1
SR0
Example:
IF NEG AF = ABS AX0 ;
Description:
Test the optional condition and, if true, then take the
absolute value of the source operand and store in the destination location.
If the condition is not true then perform a no-operation. Omitting the
condition performs the absolute value operation unconditionally. The
source operand is contained in the data register specified in the
instruction.
Status Generated:
ASTAT: 7 6
SS MV AQ AS
- -
AZ Set if the result equals zero. Cleared otherwise.
AN Set if xop is H#8000. Cleared otherwise.
AV Set if xop is H#8000. Cleared otherwise.
AC Always cleared.
AS Set if the source operand is negative. Cleared otherwise.
Instruction Format:
Conditional ALU/MAC Operation, Instruction Type 9:
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 1 0 0
AMF specifies the ALU or MAC operation. In this case,
AMF = 11111 for ABS xop operation.
Yop:
COND: condition
AR
AF
Permissible conds (see Table 15.9)
EQ LE
NE NEG
GT POS
GE AV
LT NOT AV
5 4 3
AC AV AN AZ
- * 0
Z AMF

ABSOLUTE VALUE

Y operand
= ABS xop ;
AC
NOT AC
MV
NOT MV
NOT CE
2 1 0
* * *
0 0 Xop 0 0 0 0
ALU
15
COND
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