sltu

Set on less than unsigned

Places the value 1 in register xd if register xs1 is less than the value in register xs2, where both sources are treated as unsigned numbers, else 0 is written to xd.

This instruction must have data-independent timing when extension Zkt is enabled.

Assembly format

sltu xd, xs1, xs2

Decode Variables

Bits<5> xs2 = $encoding[24:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> xd = $encoding[11:7];

Execution

X[xd] = (X[xs1] < X[xs2]) ? 1 : 0;

Encoding

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Defining extension

I

Access

M

Always

Containing profiles

  • Mandatory: RVA20S64, RVA20U64, RVA22S64, RVA22U64, RVA23S64, RVA23U64, RVB23S64, RVB23U64, RVI20U32, RVI20U64

  • Optional: None