Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 136)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 CP Instruction

121

Definition

Compare.

Syntax

CP dst, src

Operation

dst - src

Description

The source operand is compared to (subtracted from) the destination oper-

and and the flags are set according to the results of the operation. The

contents of both the source and destination operands are unaffected.

Flags

Attributes

C Set if a borrow is required by bit 7; reset otherwise

Z Set if the result is zero; reset otherwise

S Set if Bit 7 of the result is set; reset otherwise

V Set if an arithmetic overflow occurs; reset otherwise

D Unaffected

H Unaffected

Mnemonic

Destination,

Source

Code

(Hex) Operand 1 Operand 2 Operand 3

CP r1, r2 A2 {r1, r2} — —

CP r1, @r2 A3 {r1, r2} — —

1 2 ... 131 132 133 134 135 136 137 138 139 140 141 ... 313 314

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