slt

Set on less than

This instruction is defined by:

Encoding

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Synopsis

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

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

XReg src1 = X[xs1];
XReg src2 = X[xs2];
X[xd] = ($signed(src1) < $signed(src2)) ? '1 : '0;
XReg src1 = X[xs1];
XReg src2 = X[xs2];
X[xd] = ($signed(src1) < $signed(src2)) ? '1 : '0;