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/* ****************************************************************** */
union clause ast = RISCV_CLMUL : (regidx, regidx, regidx)
mapping clause encdec = RISCV_CLMUL(rs2, rs1, rd) if haveZbc() | haveZbkc()
<-> 0b0000101 @ rs2 @ rs1 @ 0b001 @ rd @ 0b0110011 if haveZbc() | haveZbkc()
mapping clause assembly = RISCV_CLMUL(rs2, rs1, rd)
<-> "clmul" ^ spc() ^ reg_name(rd) ^ sep() ^ reg_name(rs1) ^ sep() ^ reg_name(rs2)
function clause execute (RISCV_CLMUL(rs2, rs1, rd)) = {
let rs1_val = X(rs1);
let rs2_val = X(rs2);
result : xlenbits = zeros();
foreach (i from 0 to (xlen_val - 1))
if rs2_val[i] == bitone then result = result ^ (rs1_val << i);
X(rd) = result;
RETIRE_SUCCESS
}
/* ****************************************************************** */
union clause ast = RISCV_CLMULH : (regidx, regidx, regidx)
mapping clause encdec = RISCV_CLMULH(rs2, rs1, rd) if haveZbc() | haveZbkc()
<-> 0b0000101 @ rs2 @ rs1 @ 0b011 @ rd @ 0b0110011 if haveZbc() | haveZbkc()
mapping clause assembly = RISCV_CLMULH(rs2, rs1, rd)
<-> "clmulh" ^ spc() ^ reg_name(rd) ^ sep() ^ reg_name(rs1) ^ sep() ^ reg_name(rs2)
function clause execute (RISCV_CLMULH(rs2, rs1, rd)) = {
let rs1_val = X(rs1);
let rs2_val = X(rs2);
result : xlenbits = zeros();
foreach (i from 0 to (xlen_val - 1))
if rs2_val[i] == bitone then result = result ^ (rs1_val >> (xlen_val - i));
X(rd) = result;
RETIRE_SUCCESS
}
/* ****************************************************************** */
union clause ast = RISCV_CLMULR : (regidx, regidx, regidx)
mapping clause encdec = RISCV_CLMULR(rs2, rs1, rd) if haveZbc()
<-> 0b0000101 @ rs2 @ rs1 @ 0b010 @ rd @ 0b0110011 if haveZbc()
mapping clause assembly = RISCV_CLMULR(rs2, rs1, rd)
<-> "clmulr" ^ spc() ^ reg_name(rd) ^ sep() ^ reg_name(rs1) ^ sep() ^ reg_name(rs2)
function clause execute (RISCV_CLMULR(rs2, rs1, rd)) = {
let rs1_val = X(rs1);
let rs2_val = X(rs2);
result : xlenbits = zeros();
foreach (i from 0 to (xlen_val - 1))
if rs2_val[i] == bitone then result = result ^ (rs1_val >> (xlen_val - i - 1));
X(rd) = result;
RETIRE_SUCCESS
}
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