remu

Unsigned remainder

This instruction is defined by:

Encoding

svg

Synopsis

Calculate the remainder of unsigned division of rs1 by rs2, and store the result in rd.

Access

M

HS

U

VS

VU

Always

Always

Always

Always

Always

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

if ((%%LINK%csr_field;misa.M;CSR[misa].M%% == 1'b0)) {
  %%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg src1 = X[rs1];
XReg src2 = X[rs2];
if (src2 == 0) {
  X[rd] = src1;
} else {
  X[rd] = src1 % src2;
}
if (%%LINK%func;implemented?;implemented?%%(ExtensionName::M) && (%%LINK%csr_field;misa.M;CSR[misa].M%% == 1'b0)) {
  %%LINK%func;raise;raise%%(ExceptionCode::IllegalInstruction, %%LINK%func;mode;mode%%(), $encoding);
}
XReg src1 = X[rs1];
XReg src2 = X[rs2];
if (src2 == 0) {
  X[rd] = src1;
} else {
  X[rd] = src1 % src2;
}

Exceptions

This instruction may result in the following synchronous exceptions:

  • IllegalInstruction