Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet
Product codes
ATSAM4E-EK
51
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
12.4.1.9
Application Program Status Register
Name:
APSR
Access: Read/Write
Reset: 0x000000000
The APSR contains the current state of the condition flags from previous instruction executions.
N: Negative Flag
0: Operation result was positive, zero, greater than, or equal
1: Operation result was negative or less than.
Z: Zero Flag
0: Operation result was not zero
1: Operation result was zero.
C: Carry or Borrow Flag
Carry or borrow flag:
0: Add operation did not result in a carry bit or subtract operation resulted in a borrow bit
1: Add operation resulted in a carry bit or subtract operation did not result in a borrow bit.
V: Overflow Flag
0: Operation did not result in an overflow
1: Operation resulted in an overflow.
Q: DSP Overflow and Saturation Flag
Sticky saturation flag:
0: Indicates that saturation has not occurred since reset or since the bit was last cleared to zero
1: Indicates when an SSAT or USAT instruction results in saturation.
This bit is cleared to zero by software using an MRS instruction.
GE[19:16]: Greater Than or Equal Flags
See
for more information.
31
30
29
28
27
26
25
24
N
Z
C
V
Q
–
23
22
21
20
19
18
17
16
–
GE[3:0]
15
14
13
12
11
10
9
8
–
7
6
5
4
3
2
1
0
–