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S3C72G9 Datasheet(PDF) 50 Page - Samsung semiconductor |
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S3C72G9 Datasheet(HTML) 50 Page - Samsung semiconductor |
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50 / 96 page  %2$!'# $ (3-) CPSE dst,src Operation: Operand Operation Summary Bytes Cycles R,#im Compare and skip if register equals #im 2 2 + S @HL,#im Compare and skip if indirect data memory equals #im 2 2 + S A,R Compare and skip if A equals R 2 2 + S A,@HL Compare and skip if A equals indirect data memory 1 1 + S EA,@HL Compare and skip if EA equals indirect data memory 2 2 + S EA,RR Compare and skip if EA equals RR 2 2 + S Description: CPSE compares the source operand (subtracts it from) the destination operand, and skips the next instruction if the values are equal. Neither operand is affected by the comparison. Operand Binary Code Operation Notation R,#im 1 1 0 1 1 0 0 1 Skip if R = im d3 d2 d1 d0 0 r2 r1 r0 @HL,#im 1 1 0 1 1 1 0 1 Skip if (HL) = im 0 1 1 1 d3 d2 d1 d0 A,R 1 1 0 1 1 1 0 1 Skip if A = R 0 1 1 0 1 r2 r1 r0 A,@HL 0 0 1 1 1 0 0 0 Skip if A = (HL) EA,@HL 1 1 0 1 1 1 0 0 Skip if A = (HL), E = (HL+1) 0 0 0 0 1 0 0 1 EA,RR 1 1 0 1 1 1 0 0 Skip if EA = RR 1 1 1 0 1 r2 r1 0 Example: The extended accumulator contains the value 34H and register pair HL contains 56H. The second instruction (RET) in the instruction sequence CPSE EA,HL RET is not skipped. That is, the subroutine returns since the result of the comparison is 'not equal.' |
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