Infineon Technologies C166S V2 User Manual page 399

CoMULu
Group
Syntax
Source Operand(s)
Destination Operand(s)
Operation
(ACC) ← (op1) * (op2)
Description
Multiplies the two unsigned 16-bit source operands op1 and op2. The resulting
unsigned 32-bit product is zero-extended before being stored in the 40-bit ACC register.
MAC Flags
MV MSL
0 *
MV Always cleared.
MSL Set if the contents of ACC is automatically saturated. Not affected
otherwise.
ME Set if the MAE is used. Cleared otherwise.
MSV Not affected.
MC Always cleared.
MZ Set if result equals zero. Cleared otherwise.
MN Always cleared.
Encoding
Mnemonic
CoMULu Rw
CoMULu Rw
CoMULu [IDXi*] , [Rw
User Manual
Unsigned Multiply
Multiply/Multiply-Accumulate Instructions
CoMULu op1, op2
op1, op2 → WORD
ACC → 40-bit signed value
ME MSV
* -
, Rw
n m
, [Rw *]
n m
*]
m
Detailed Instruction Description
MC MZ
0 *
Format
A3 nm 00 rrr0:0000
83 nm 00 rrr0:0qqq
93 Xm 00 rrr0:0qqq
8-399
User Manual
C166S V2
CoMULu
MN Sat.
0 yes
Bytes
4
4
4
V 1.7, 2001-01