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ST20C2 Arkusz danych(PDF) 152 Page - STMicroelectronics |
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ST20C2 Arkusz danych(HTML) 152 Page - STMicroelectronics |
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152 / 212 page ![]() satmul ® 152/212 satmul saturating multiply Code: 26 FA Description: Perform multiplication using ‘saturating arithmetic’ i.e. signed arithmetic where overflowing results do not wrap round but return MostPos or MostNeg according to the sign of the result. This instruction is used for clipping algorithms in signal processing. Definition: if (prod > MostPos) Areg ′← MostPos else if (prod < MostNeg) Areg ′← MostNeg else Areg ′← prod Breg ′← Creg Creg ′← undefined where prod = Breg × Areg – prod is calculated to unlimited precision Error signals: none Comments: Secondar y instruction. See also: satadd satsub |
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