add.uw
Add unsigned word
This instruction is defined by:
Synopsis
This instruction performs an XLEN-wide addition between rs2 and the zero-extended least-significant word of rs1.
Decode Variables
Bits<5> rs2 = $encoding[24:20];
Bits<5> rs1 = $encoding[19:15];
Bits<5> rd = $encoding[11:7];
Execution
-
Pruned, XLEN == 64
-
Original
X[rd] = X[rs2] + X[rs1][31:0];
if (implemented?(ExtensionName::B) && (CSR[misa].B == 1'b0)) {
raise(ExceptionCode::IllegalInstruction, mode(), $encoding);
}
X[rd] = X[rs2] + X[rs1][31:0];