PM0044 datasheet(137/162 Pages) STMICROELECTRONICS

137 / 162 page

PM0044

STM8 instruction set

Doc ID 13590 Rev 3

137/162

Syntax

RRC dst

e.g. RRC (X)

Operation

Description

The destination is either a memory byte location or a register. This

instruction is compact, and does not affect any register when used with

RAM variables.This instruction shifts all bits of the register or memory, one

place to the right. Bit 7 of the result is a copy of the CC.C bit value before

the operation.

Instruction overview

⇒

Set if bit 7 of the result is set (negative value), cleared otherwise.

⇒

R7.R6.R5.R4.R3.R2.R1.R0

Set if the result is zero (0x00), cleared otherwise.

⇒

Set if, before the shift, the LSB of register or memory was set, cleared

otherwise.

Detailed description

See also: RLC, SRL, SLL, SRA, SWAP, ADC, SLA

RRC

Rotate Right Logical through Carry

RRC

mnem

dst

Affected condition flags

VI1

RRC

Reg

bit0

RRC

Mem

bit0

dst

Asm

lgth

Op-code(s)

ST7

RRC A

✗

shortmem

RRC $10

✗

longmem

RRC $1000

(X)

RRC (X)

✗

(shortoff,X)

RRC ($10,X)

✗

(longoff,X)

RRC ($1000,X)

(Y)

RRC (Y)

✗

(shortoff,Y)

RRC ($10,Y)

✗

(longoff,Y)

RRC ($1000,Y)

(shortoff,SP)

RRC ($10,SP)

✗

[shortptr.w]

RRC [$10]

✗

[longptr.w]

RRC [$1000].w

([shortptr.w],X)

RRC ([$10],X)

✗

([longptr.w],X)

RRC ([$1000.w],X)

([shortptr.w],Y)

RRC ([$10],Y)

✗

Cb7

PM0044 数据表(PDF) 137 Page - STMicroelectronics

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