sh2add.uw

Shift unsigned word left by 2 and add

This instruction is defined by:

Encoding

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Synopsis

Performs an XLEN-wide addition of two addends. The first addend is xs2. The second addend is the unsigned value formed by extracting the least-significant word of xs1 and shifting it left by 2 places.

Access

M HS U VS VU

Always

Always

Always

Always

Always

Decode Variables

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

Execution

  • Pruned, XLEN == 64

  • Original

X[xd] = X[xs2] + (X[xs1][31:0] << 2);
X[xd] = X[xs2] + (X[xs1][31:0] << 2);