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V850E/MA3 Datasheet(PDF) 22 Page - NEC |
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V850E/MA3 Datasheet(HTML) 22 Page - NEC |
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22 / 226 page  CHAPTER 2 REGISTER SET User’s Manual U14559EJ3V1UM 22 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 Flag Status of Operation Result SAT OV S Operation Result of Saturation Processing Maximum positive value is exceeded 1 1 0 7FFFFFFFH Maximum negative value is exceeded 1 1 1 80000000H Positive (Not exceeding maximum value) Holds the value before 0 0 Operation result Negative (Not exceeding maximum value) operation 1 |
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