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Individual Instruction Descriptions
4-98
4.14.16 EXTSGN Sign Extend Word
Syntax
[label] name dest [, mod] Clock, clk Word, w With RPT, clk Class
EXTSGN An[~] [, 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 An[~] [, next A] 1 1 1 0 0 next A An 0 1 1 1 1 0 0 ~A
Description Copy accumulator sign flag (SF) to all 16 bits of An[~].
See Also EXTSGNS
Example 4.14.16.1 EXTSGN A0~, ++A
Preincrement accumulator pointer AP0. Sign extend the accumulator A0~.