# Vault 7: Projects

This publication series is about specific projects related to the Vault 7 main publication.

### Protego

# PIC24FJ64GA004 - Programmers Reference Manual

- 1
- 2
…
- 324
- 325
- 326
- 327
- 328
…
- 501
- 502

16-bit MCU and DSC Programmer’s Reference Manual
DS70157F-page 326 © 2005-2011 Microchip Technology Inc.
MULW.SU
Integer 16x16-bit Signed-Unsigned Multiply with 16-bit
Result
Implemented in: PIC24F PIC24H PIC24E dsPIC30F dsPIC33F dsPIC33E
X X
Syntax: {label:} MUL.SU Wb, Ws, Wnd
[Ws],
[Ws++],
[Ws--],
[++Ws],
[--Ws],
Operands: Wb ∈ [W0 ... W15]
Ws ∈ [W0 ... W15]
Wnd ∈ [W0, W2, W4 ... W12]
Operation: signed (Wb) * unsigned (Ws) → Wnd
Status Affected: None
Encoding:
1011 1001 0www wddd dppp ssss
Description: Multiply the contents of Wb with the contents of Ws, and store the result
in a working register, which must be an even numbered working register.
The Wb operand and the result Wnd are interpreted as a two’s
complement signed integer. The Ws operand is interpreted as an
unsigned integer. Register direct addressing must be used for Wb and
Wnd. Register direct or register indirect addressing may be used for Ws.
The ‘w’ bits select the address of the base register.
The ‘d’ bits select the address of the lower destination register.
The ‘p’ bits select the source Address mode.
The ‘s’ bits select the source register.
Note 1: This instruction operates in Word mode only.
2: Wnd must be an even working register.
3: Wnd may not be W14, since W15<0> is fixed to zero.
4: The IF bit and the US<1:0> bits in the CORCON register have
no effect on this operation.
Words: 1
Cycles:
1
(1)
Note 1:
In dsPIC33E and PIC24E devices, the listed cycle count does not apply to read and
read-modify-write operations on non-CPU Special Function Registers. For more
details, see
Note 3
in
Section 3.2.1 “Multi-Cycle Instructions”
.
Example 1:
MULW.SU W8, [W9], W0 ; Multiply W8*[W9]
; Store the result to W0
Before
Instruction
After
Instruction
W0 68DC W0 0000
W8 F000 W8 F000
W9 178C W9 178C
Data 178C F000 Data 178C F000
SR 0000 SR 0000

- 1
- 2
…
- 324
- 325
- 326
- 327
- 328
…
- 501
- 502