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Individual Instruction Descriptions
4-141
Assembly Language Instructions
4.14.47 NEGACS Two’s Complement Negation of Accumulator String
Syntax
[label] name dest, src
Clock,
clk
Word,
w
With RPT,
clk
Class
NEGACS A
n
[~], A
n
[~] n
S
+3 1 n
R
+3 3
Execution
dest
⇐ –
src
PC ⇐ PC + 1
Flags Affected OF, SF, ZF, CF are set accordingly
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
MULSPL S A
n
[~], A
n
[~] 1 1 1 0 0 1 1 A
n
0 0 0 0 0 0 A~ ~A
Description Perform two’s complement negation of
src
accumulator string and store result
in
dest
accumulator string.
See Also NEGAC, SUB, SUBB, SUBS, ADD, ADDB, ADDS, NOTAC, NOTACS
Example 4.14.47.1 NEGACS A3~, A3
Negate accumulator string A3 and store result in accumulator string A3~.