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S3C9454 Datasheet(PDF) 11 Page - Samsung semiconductor |
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S3C9454 Datasheet(HTML) 11 Page - Samsung semiconductor |
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11 / 50 page  S3C9442/C9444/F9444/C9452/C9454/F9454 SAM88RCRI INSTRUCTION SET 6-11 ADC — Add with Carry ADC dst,src Operation: dst ← dst + src + c The source operand, along with the setting of the carry flag, is added to the destination operand and the sum is stored in the destination. The contents of the source are unaffected. Two's-complement addition is performed. In multiple precision arithmetic, this instruction permits the carry from the addition of low-order operands to be carried into the addition of high-order operands. Flags: C: Set if there is a carry from the most significant bit of the result; cleared otherwise. Z: Set if the result is "0"; cleared otherwise. S: Set if the result is negative; cleared otherwise. V: Set if arithmetic overflow occurs, that is, if both operands are of the same sign and the result is of the opposite sign; cleared otherwise. Format: Bytes Cycles Opcode (Hex) Addr Mode dst src opc dst | src 2 4 12 r r 6 13 r lr opc src dst 3 6 14 R R 6 15 R IR opc dst src 3 6 16 R IM Examples: Given: R1 = 10H, R2 = 03H, C flag = "1", register 01H = 20H, register 02H = 03H, and register 03H = 0AH: ADC R1,R2 → R1 = 14H, R2 = 03H ADC R1,@R2 → R1 = 1BH, R2 = 03H ADC 01H,02H → Register 01H = 24H, register 02H = 03H ADC 01H,@02H → Register 01H = 2BH, register 02H = 03H ADC 01H,#11H → Register 01H = 32H In the first example, destination register R1 contains the value 10H, the carry flag is set to "1", and the source working register R2 contains the value 03H. The statement "ADC R1,R2" adds 03H and the carry flag value ("1") to the destination value 10H, leaving 14H in register R1. |
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