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Individual Instruction Descriptions
4-97
Assembly Language Instructions
4.14.16 EXTSGN Sign Extend Word
Syntax
[label] name dest
[
, mod
] Clock,
clk
Word,
w
With RPT,
clk
Class
EXTSGN A
n
[~] [,
next A
] 1 1 n
R
+3 3
Execution [premodify AP if
mod
specified]
new most significant word of
dest
⇐ STAT.SF
PC ⇐ PC + 1
Flags Affected None
Opcode
Instructions 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
EXTSGN A
n
[~] [,
next A
] 1 1 1 0 0
next A
A
n
0 1 1 1 1 0 0 ~A
Description Copy accumulator sign flag (SF) to all 16 bits of A
n
[~].
See Also EXTSGNS
Example 4.14.16.1 EXTSGN A0~, ++A
Preincrement accumulator pointer AP0. Sign extend the accumulator A0~.