Zilog Z8F0130 Manual de usuario descargar pdf (Pagina 262)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 TMX Instruction

247

TMX

Definition

Test Under Mask using Extended Addressing.

Syntax

TMX dst, src

Operation

dst AND src

Description

This new eZ8 extended addressing instruction tests selected bits in the

destination operand for a logical 0 value. Specify the bits to be tested by

setting a 1 bit in the corresponding bit position in the source operand (the

mask). The TMX instruction AND’s the destination with the source oper-

and (mask). Check the Zero flag to determine the result. If the Z flag is

set, the tested bits are 0. When a TMX operation is completed, the desti

nation and source operands retain their original values.

Flags

C Unaffected

Z Set if the result is zero; reset otherwise

S Set if the result is negative; reset otherwise

V Reset to 0

D Unaffected

H Unaffected

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