sh2add

Shift left by 2 and add

This instruction is defined by:

Encoding

Synopsis

Shifts xs1 to the left by 2 places and adds it to xs2.

Access

M	HS	U	VS	VU
Always	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

if (implemented?(ExtensionName::B) && (misa.B == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
X[xd] = X[xs2] + (X[xs1] << 2);

if (implemented?(ExtensionName::B) && (misa.B == 1'b0)) {
  raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
X[xd] = X[xs2] + (X[xs1] << 2);

Exceptions

This instruction may result in the following synchronous exceptions:

IllegalInstruction