slli

Shift left logical immediate

Shift the value in xs1 left by shamt, and store the result in xd

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

Assembly format

slli xd, xs1, shamt

Decode Variables

  • RV32

  • RV64

Bits<5> shamt = $encoding[24:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> xd = $encoding[11:7];
Bits<6> shamt = $encoding[25:20];
Bits<5> xs1 = $encoding[19:15];
Bits<5> xd = $encoding[11:7];

Execution

X[xd] = X[xs1] << shamt;

Encoding

This instruction has different encodings in RV32 and RV64.
RV32
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RV64
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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