Infineon Technologies C166S V2 User Manual page 400

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 first zero-extended; then, it is negated 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 Set if the most significant bit of the result is set. Cleared otherwise.
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 08 rrr0:0000
83 nm 08 rrr0:0qqq
93 Xm 08 rrr0:0qqq
8-400
User Manual
C166S V2
CoMULu-
MN Sat.
* yes
Bytes
4
4
4
V 1.7, 2001-01