Datasheet

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Instruction Set Description

4.6.3.4 ANDX

ANDX.A Logical AND of source address-word with destination address-word

ANDX.[W] Logical AND of source word with destination word

ANDX.B Logical AND of source byte with destination byte

ANDX.A src,dst

Syntax

ANDX src,dst or ANDX.W src,dst

ANDX.B src,dst

Operation src .and. dst → dst

Description The source operand and the destination operand are logically ANDed. The result is

placed into the destination. The source operand is not affected. Both operands may be

located in the full address space.

Status Bits N: Set if result is negative (MSB = 1), reset if positive (MSB = 0)

Z: Set if result is zero, reset otherwise

C: Set if the result is not zero, reset otherwise. C = (.not. Z)

V: Reset

Mode Bits OSCOFF, CPUOFF, and GIE are not affected.

Example The bits set in R5 (20-bit data) are used as a mask (AAA55h) for the address-word TOM

located in two words. If the result is zero, a branch is taken to label TONI.

MOVA #AAA55h,R5 ; Load 20-bit mask to R5

ANDX.A R5,TOM ; TOM .and. R5 -> TOM

JZ TONI ; Jump if result 0

... ; Result > 0

or shorter:

ANDX.A #AAA55h,TOM ; TOM .and. AAA55h -> TOM

JZ TONI ; Jump if result 0

Example A table byte pointed to by R5 (20-bit address) is logically ANDed with R6. R6.19:8 = 0.

The table pointer is auto-incremented by 1.

ANDX.B @R5+,R6 ; AND table byte with R6. R5 + 1

219

SLAU144J–December 2004–Revised July 2013 CPUX

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