M166 Datasheet, PDF (86/127 Pages) Siemens Semiconductor Group – C16x Family of Siemens 16-Bit CMOS Single-Chip Microcontrollers

30Mar98@15:00h
C166 Family Instruction Set
Instruction Description
MUL
Signed Multiplication
MUL
Syntax
Operation
Data Types
Description
MUL
op1, op2
(MD) ← (op1) * (op2)
WORD
Performs a 16-bit by 16-bit signed multiplication using the two words
specified by operands op1 and op2 respectively. The signed 32-bit result
is placed in the MD register.
Condition Flags
E
Z
V
C
N
0
*
S
0
*
Addressing Modes
E Always cleared.
Z Set if the result equals zero. Cleared otherwise.
V This bit is set if the result cannot be represented in a word data type.
Cleared otherwise.
C Always cleared.
N Set if the most significant bit of the result is set. Cleared otherwise.
Mnemonic
MUL
Rw_n, Rw_m
Format
0B nm
Bytes
2
Semiconductor Group
86
Version 1.2, 12.97