Computer Hardware User's Guide

Logical Shift, 3-Operand LSH3
13-139 Assembly Language Instructions
Cycles 1
Status Bits These condition flags are modified only if the destination register is R7–R0.
LUF Unaffected
LV Unaffected
UF 0
N MSB of the output
Z 1 if a 0 output is generated; 0 otherwise
V 0
C Set to the value of the last bit shifted out; 0 for a shift
count of 0;
unaffected if dst is not R7–R0
OVM Operation is not affected by OVM bit value.
Example 1 LSH3 R4,R7,R2
Before Instruction After Instruction
R2 00 0000 0000 R2 00 AC00 0000
R4 00 0000 0018 R4 00 0000 0018
R7 00 0000 02AC R7 00 0000 02AC
LUF 0 LUF 0
LV 0 LV 0
UF 0 UF 0
N 0 N 1
Z 0 Z 0
V 0 V 1
C 0 C 0
24 24
Mode Bit