Datasheet

15 0
7 0
C
Byte
Word
Instruction Set www.ti.com
3.4.6.39 RLC
*RLC[.W] Rotate left through carry
*RLC.B Rotate left through carry
Syntax RLC dst or RLC.W dst
RLC.B dst
Operation C <- MSB <- MSB-1 .... LSB+1 <- LSB <- C
Emulation ADDC dst,dst
Description The destination operand is shifted left one position as shown in Figure 3-16. The carry
bit (C) is shifted into the LSB and the MSB is shifted into the carry bit (C).
Figure 3-16. Destination Operand - Carry Left Shift
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 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 R5 is shifted left one position.
RLC R5 ; (R5 x 2) + C -> R5
Example The input P1IN.1 information is shifted into the LSB of R5.
BIT.B #2,&P1IN ; Information -> Carry
RLC R5 ; Carry=P0in.1 -> LSB of R5
Example The MEM(LEO) content is shifted left one position.
RLC.B LEO ; Mem(LEO) x 2 + C -> Mem(LEO)
NOTE: RLC and RLC.B Substitution
The assembler does not recognize the instruction:
RLC @R5+, RLC @R5, or RLC(.B) @R5
It must be substitued by:
ADDC @R5+,-2(R5), ADDC.B @R5+,-1(R5), or ADDC(.B) @R5
102
CPU SLAU144J–December 2004–Revised July 2013
Submit Documentation Feedback
Copyright © 2004–2013, Texas Instruments Incorporated