Infineon Technologies C166S V2 User Manual page 397

CoMULsu-
Group
Syntax
Source Operand(s)
Destination Operand(s)
Operation
(ACC) ← - ((op1) * (op2))
Description
Multiplies the two signed and unsigned 16-bit source operands op1 and op2,
respectively. The resulting signed 32-bit product is first sign-extended; then, is negated
before being stored in the 40-bit ACC register.
MAC Flags
MV MSL
0 -
MV Always cleared.
MSL Not affected.
ME Always cleared.
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
CoMULsu- Rw
CoMULsu- Rw
CoMULsu- [IDXi*] , [Rw
User Manual
Mixed Multiply
Multiply/Multiply-Accumulate Instructions
CoMULsu- op1, op2
op1, op2 → WORD
ACC → 40-bit signed value
ME MSV
0 -
, Rw
n m
, [Rw *]
n m
*]
m
Detailed Instruction Description
MC MZ
0 *
Format
A3 nm 48 rrr0:0000
83 nm 48 rrr0:0qqq
93 Xm 48 rrr0:0qqq
8-397
User Manual
C166S V2
CoMULsu-
MN Sat.
* no
Bytes
4
4
4
V 1.7, 2001-01