V850E1 Datasheet, PDF (22/226 Pages) NEC – 32-Bit Microprocessor Core

CHAPTER 2 REGISTER SET
Figure 2-6. Program Status Word (PSW) (2/2)
Bit Position Flag Name
Function
1
S^Note
Indicates whether the result of the operation is negative.
0: Result is positive or zero
1: Result is negative
0
Z
Indicates whether the result of the operation is zero.
0: Result is not zero
1: Result is zero
Note
In the case of saturate instructions, the SAT, S, and OV flags will be set according to the result of the
operation as shown in the table below. Note that the SAT flag is set to 1 only when the OV flag has
been set to 1 during a saturated operation.
Status of Operation
Status of Flag
Result
SAT
OV
S
Maximum positive
1
1
0
value is exceeded
Maximum negative
1
1
1
value is exceeded
Positive (Not exceeding Holds the
0
0
maximum value)
value before
Negative (Not exceeding operation
1
maximum value)
Operation Result of Saturation
Processing
7FFFFFFFH
80000000H
Operation result
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