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S3C9442 Datasheet(PDF) 40 Page - Samsung semiconductor |
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S3C9442 Datasheet(HTML) 40 Page - Samsung semiconductor |
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40 / 50 page  SAM88RCRI INSTRUCTION SET S3C9442/C9444/F9444/C9452/C9454/F9454 6-40 RLC — Rotate Left Through Carry RLC dst Operation: dst (0) ← C C ← dst (7) dst (n + 1) ← dst (n), n = 0–6 The contents of the destination operand with the carry flag are rotated left one bit position. The initial value of bit 7 replaces the carry flag (C); the initial value of the carry flag replaces bit zero. C 7 0 Flags: C: Set if the bit rotated from the most significant bit position (bit 7) was "1". Z: Set if the result is "0"; cleared otherwise. S: Set if the result bit 7 is set; cleared otherwise. V: Set if arithmetic overflow occurred, that is, if the sign of the destination changed during rotation; cleared otherwise. Format: Bytes Cycles Opcode (Hex) Addr Mode dst opc dst 2 4 10 R 4 11 IR Examples: Given: Register 00H = 0AAH, register 01H = 02H, and register 02H = 17H, C = "0": RLC 00H → Register 00H = 54H, C = "1" RLC @01H → Register 01H = 02H, register 02H = 2EH, C = "0" In the first example, if general register 00H has the value 0AAH (10101010B), the statement "RLC 00H" rotates 0AAH one bit position to the left. The initial value of bit 7 sets the carry flag and the initial value of the C flag replaces bit zero of register 00H, leaving the value 55H (01010101B). The MSB of register 00H resets the carry flag to "1" and sets the overflow flag. |
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