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Individual Instruction Descriptions
4-175
Assembly Language Instructions
Syntax Description
SUB A
n
[~], A
n
, {
adrs
} [,
next A
] Subtract effective data memory word from A
n
[~], store result in A
n
SUB A
n
[~], A
n
[~],
imm16
[,
next A
] Subtract immediate word from A
n
[~], store result in A
n
[~]
SUB A
n
[~], A
n
[~], PH [,
next A
] Subtract Product High (PH) register from A
n
[~], store result in A
n
[~]
SUB A
n
[~], A
n
, A
n
~ [,
next A
] Subtract A
n
~ word from A
n
word, store result in A
n
[~]
SUB A
n
[~], A
n
~, A
n
[,
next A
] Subtract A
n
word from A
n
~ word, store result in A
n
[~]
SUB R
x
,
imm16
Subtract immediate word from R
x
SUB R
x
, R5 Subtract R5 from R
x
See Also SUBB, SUBS, ADD, ADDB, ADDS
Example 4.14.79.1 SUB A1, A1, 74
Subtract 74 (decimal) immediate from accumulator A1, put result in accumulator A1.
Example 4.14.79.2 SUB A0, A0, 2, ++A
Pre–increment pointer AP0, subtract 2 from new accumulator A0, put result in accumulator A0.
Example 4.14.79.3 SUB A1, A1~, A1
Subtract accumulator A1 from accumulator A1~, put result in accumulator A1.
Example 4.14.79.4 SUB A1, A1, A1~, ––A
Pre–decrement AP1. Subtract accumulator A1~ from accumulator A1, put result in accumulator A1.
Example 4.14.79.5 SUB A3~, A3, *R4—
Subtract word at address in R4 from A3, store result in A3~, decrement value in R4 by 2 (word mode)
after the subtraction.
Example 4.14.79.6 SUB R3, R5
Subtract R5 from R3, put result in R3.