upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 64

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

64
Note The result of a saturation-processed operation is determined by the contents of the OV and S bits in the
saturation operation. Simply setting (1) the OV bit will set (1) the SAT bit in a saturation operation.
SAT
Maximum positive value exceeded
Maximum negative value exceeded
Positive (not exceeding the maximum)
Negative (not exceeding the maximum)
OV
S
CY
Z
0
1
0
1
0
1
0
1
0
1
Note
Note
Note
Status of operation result
Not saturated.
Saturated.
Overflow has not occurred.
Overflow occurred.
Overflow has not occurred.
Overflow occurred.
The operation result was positive or 0.
The operation result was negative.
The operation result was not 0.
The operation result was 0.
This flag is not cleared (0) if the result of saturated operation instruction execution
is not saturated while this flag is set (1). To clear (0) this flag, write the PSW
directly.
Saturation detection of operation result of saturation operation instruction
Detection of carry or borrow of operation result
Detection of operation result positive/negative
Detection of overflow during operation
CHAPTER 3 CPU FUNCTIONS
Detection of operation result zero
User’s Manual U12768EJ4V1UD
Retains
the value
before
operation
SAT
1
1
Flag status
OV
1
1
0
S
0
1
0
1
7FFFFFFFH
80000000H
Operation result itself
Saturation-processed
operation result
(2/2)