PM0044 datasheet(134/162 Pages) STMICROELECTRONICS

134 / 162 page

STM8 instruction set

PM0044

134/162

Doc ID 13590 Rev 3

Syntax

RLC dst

e.g. RLC (X)

Operation

Description

The destination is either a memory byte 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 left, through the Carry bit. Bit 0 of the result is a copy of the CC.C

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 MSB of register or memory was set, cleared

otherwise.

Detailed description

See also: RLCW, RRC, SLL, SRL, SRA, ADC, SWAP, SLA

RLC

Rotate Left Logical

through Carry

RLC

mnem

dst

Affected condition flags

VI1

RLC

Reg

bit7

RLC

Mem

bit7

dst

Asm

lgth

Op-code(s)

ST7

ARLC A

✗

shortmem

RLC $10

✗

longmem

RLC $1000

(X)

RLC (X)

✗

(shortoff,X)

RLC ($10,X)

✗

(longoff,X)

RLC ($1000,X)

(Y)

RLC (Y)

✗

(shortoff,Y)

RLC ($10,Y)

✗

(longoff,Y)

RLC ($1000,Y)

(shortoff,SP)

RLC ($10,SP)

✗

[shortptr.w]

RLC [$10]

✗

[longptr.w]

RLC [$1000].w

([shortptr.w],X)

RLC ([$10],X)

✗

([longptr.w],X)

RLC ([$1000.w],X)

([shortptr.w],Y)

RLC ([$10],Y)

✗

Cb7

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