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CM71-00105-1E FUJITSU MICROELECTRONICS LIMITED 177
FR81 Family
CHAPTER 7 DETAILED EXECUTION INSTRUCTIONS
7.37
7.37 DIV2 (Correction When Remain is zero)
This is a step division instruction used for signed division.
● Assembler Format
DIV2 Ri
● Operation
if (D1==1) {
MDH + Ri → temp
}
else {
MDH - Ri → temp
}
if (Z==1) {
0 → MDH
}
● Flag Change
N, V: Unchanged.
Z: Set when the result of step division is zero, cleared otherwise. Set according to remainder of division
results, not according to quotient.
C: Set when the operation result of step division involves a carry or borrow operation, cleared otherwise.
● Classification
Multiply/Divide Instruction
● Execution Cycles
c cycle
NZVC
-C-C