Datasheet

MSB

LSB

Instruction Set Description

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4.6.3.24 RLCX

* RLCX.A Rotate left through carry address-word

* RLCX.[W] Rotate left through carry word

* RLCX.B Rotate left through carry byte

RLCX.A dst

Syntax

RLCX dst or RLCX.W dst

RLCX.B dst

Operation C ← MSB ← MSB-1 .... LSB+1 ← LSB ← C

ADDCX.A dst,dst

Emulation

ADDCX dst,dst

ADDCX.B dst,dst

Description The destination operand is shifted left one position as shown in Figure 4-45. The carry

bit (C) is shifted into the LSB and the MSB is shifted into the carry bit (C).

Status Bits N: Set if result is negative, reset if positive

Z: Set if result is zero, reset otherwise

C: Loaded from the MSB

V: Set if an arithmetic overflow occurs: the initial value is 040000h ≤ dst < 0C0000h;

reset otherwise

Set if an arithmetic overflow occurs: the initial value is 04000h ≤ dst < 0C000h;

reset otherwise

Set if an arithmetic overflow occurs: the initial value is 040h ≤ dst < 0C0h; reset

otherwise

Mode Bits OSCOFF, CPUOFF, and GIE are not affected.

Example The 20-bit value in R5 is shifted left one position.

RLCX.A R5 ; (R5 x 2) + C -> R5

Example The RAM byte LEO is shifted left one position. PC is pointing to upper memory.

RLCX.B LEO ; RAM(LEO) x 2 + C -> RAM(LEO)

Figure 4-45. Destination Operand-Carry Left Shift

240

CPUX SLAU144J–December 2004–Revised July 2013

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