# Vault 7: Projects

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

### Protego

# PIC24FJ64GA004 - Programmers Reference Manual

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© 2005-2011 Microchip Technology Inc. DS70157F-page 381
Section 5. Instruction Descriptions
Instruction
Descriptions
5
RRC
Rotate Right f through Carry
Implemented in: PIC24F PIC24H PIC24E dsPIC30F dsPIC33F dsPIC33E
X X X X X X
Syntax: {label:} RRC{.B} f {,WREG}
Operands: f ∈ [0 ... 8191]
Operation: For byte operation:
(C) → Dest<7>
(f<7:1>) → Dest<6:0>
(f<0>) → C
For word operation:
(C) → Dest<15>
(f<15:1>) → Dest<14:0>
(f<0>) → C
Status Affected: N, Z, C
Encoding: 1101 0111 1BDf ffff ffff ffff
Description: Rotate the contents of the file register f one bit to the right through the
Carry flag and place the result in the destination register. The Carry flag
of the STATUS Register is shifted into the Most Significant bit of the
destination, and it is then overwritten with the Least Significant bit of Ws.
The optional WREG operand determines the destination register. If
WREG is specified, the result is stored in WREG. If WREG is not
specified, the result is stored in the file register.
The ‘B’ bit selects byte or word operation (‘0’ for byte, ‘1’ for word).
The ‘D’ bit selects the destination (‘0’ for WREG, ‘1’ for file register).
The ‘f’ bits select the address of the file register.
Note 1: The extension .B in the instruction denotes a byte operation
rather than a word operation. You may use a .W extension to
denote a word operation, but it is not required.
2: The WREG is set to working register W0.
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”
.
C
Example 1:
RRC.B 0x1233 ; Rotate Right w/ C (0x1233) (Byte mode)
Before
Instruction
After
Instruction
Data 1232 E807 Data 1232 7407
SR 0000 SR 0000

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