Datasheet

Instruction Set Description

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4.6.2.51 XOR

XOR[.W] Exclusive OR source word with destination word

XOR.B Exclusive OR source byte with destination byte

Syntax

XOR src,dst or XOR.W src,dst

XOR.B src,dst

Operation src .xor. dst → dst

Description The source and destination operands are exclusively ORed. The result is placed into the

destination. The source operand is not affected. The previous content of the destination

is lost.

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 result is not zero, reset otherwise (C = .not. Z)

V: Set if both operands are negative before execution, reset otherwise

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

Example Toggle bits in word CNTR (16-bit data) with information (bit = 1) in address-word TONI.

Both operands are located in lower 64KB.

XOR &TONI,&CNTR ; Toggle bits in CNTR

Example A table word pointed to by R5 (20-bit address) is used to toggle bits in R6. R6.19:16 = 0.

XOR @R5,R6 ; Toggle bits in R6

Example Reset to zero those bits in the low byte of R7 that are different from the bits in byte EDE.

R7.19:8 = 0. The address of EDE is within PC ± 32 K.

XOR.B EDE,R7 ; Set different bits to 1 in R7.

INV.B R7 ; Invert low byte of R7, high byte is 0h

214

CPUX SLAU144J–December 2004–Revised July 2013

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