Infineon Technologies C166S V2 User Manual page 301

SHL
Group
Syntax
Source Operand(s)
Destination Operand(s)
Operation
(count) ← (op2)
(C) ← 0
DO WHILE ((count) ≠ 0)
END WHILE
Description
Shifts the destination word operand op1 the number of times as specified by the source
operand op2. The least significant bits of the result are filled with zeros accordingly. The
most significant bit is shifted into the Carry. Only shift values between 0 and 15 are
allowed. When using a GPR as the count control, only the least significant four bits are
used.
CPU Flags
E Always cleared.
Z Set if result equals zero. Cleared otherwise.
V Always cleared.
C The carry flag is set according to the last most significant bit shifted out of
op1. Cleared for a shift count of zero.
N Set if the most significant bit of the result is set. Cleared otherwise.
User Manual
Shift and Rotate Instructions
SHL op1, op2
op1 → WORD
op2 → shift counter
op1 → WORD
(C) ← (op1[15])
(op1[n]) ← (op1[n-1]) [n=15...1]
(op1[0]) ← 0
(count) ← (count) - 1
E Z
0 *
Detailed Instruction Description
Shift Left
V C
0 S
8-301
User Manual
C166S V2
SHL
N
*
V 1.7, 2001-01