Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 239)

100

101

eZ8

™

CPU Core

User Manual

UM012820-0810 SRA Instruction

224

SRA

Definition

Shift Right Arithmetic.

Syntax

SRA dst

Operation

Description

This instruction performs an arithmetic shift to the right by one bit posi-

tion on the destination operand. Bit 0 replaces the Carry (C) flag. The

value of Bit 7 (the Sign bit) does not change, but its value shifts into Bit 6.

Flags

C Set if the bit rotated from the least-significant bit position was 1

(that is, Bit 0 was 1)

Z Set if the result is zero; reset otherwise

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

V Reset to 0

D Unaffected

H Unaffected

D7 D6 D5 D4 D3 D2 D1 D0

dst

1 2 ... 234 235 236 237 238 239 240 241 242 243 244 ... 313 314

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