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Conditional Increment returns, in the destination register, the value of the source register incremented by 1 if the condition is TRUE, and otherwise returns the value of the source register.

如果条件为TRUE，则条件增量在目标寄存器中返回源寄存器的值加1，否则返回源寄存器。

32-bit variant
    Applies when sf == 0.
    CINC <Wd>, <Wn>, <cond>

64-bit variant
    Applies when sf == 1.
    CINC <Xd>, <Xn>, <cond>

Decode for all variants of this encoding
 integer d = UInt(Rd);
 integer n = UInt(Rn);
 integer datasize = if sf == '1' then 64 else 32;

Operation
 bits(datasize) result;
 bits(datasize) operand1 = X[n];
 
 if ConditionHolds(cond) then
     result = operand1 + 1;
 else
     result = operand1;
 
 X[d] = result;

  404288:    710002ff     cmp    w23, #0x0           // w23=0
  40428c:    aa1b03fc     mov    x28, x27            // x28=x27=walk->next
  404290:    110006f7     add    w23, w23, #0x1      // w23=w23+1    count++
  404294:    1a94069b     cinc    w27, w20, ne    // w27=0, w20=0; if ConditionHolds(cond) then w27=w20+1=1
  404298:    17ffffd2     b    4041e0 <ferror@plt+0x2300>