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/*=======================================================================================*/
/* This Sail RISC-V architecture model, comprising all files and */
/* directories except where otherwise noted is subject the BSD */
/* two-clause license in the LICENSE file. */
/* */
/* SPDX-License-Identifier: BSD-2-Clause */
/*=======================================================================================*/
union clause ast = ZICOND_RTYPE : (regidx, regidx, regidx, zicondop)
mapping clause encdec = ZICOND_RTYPE(rs2, rs1, rd, RISCV_CZERO_EQZ) if haveZicond()
<-> 0b0000111 @ rs2 @ rs1 @ 0b101 @ rd @ 0b0110011 if haveZicond()
mapping clause encdec = ZICOND_RTYPE(rs2, rs1, rd, RISCV_CZERO_NEZ) if haveZicond()
<-> 0b0000111 @ rs2 @ rs1 @ 0b111 @ rd @ 0b0110011 if haveZicond()
mapping zicond_mnemonic : zicondop <-> string = {
RISCV_CZERO_EQZ <-> "czero.eqz",
RISCV_CZERO_NEZ <-> "czero.nez"
}
mapping clause assembly = ZICOND_RTYPE(rs2, rs1, rd, op)
<-> zicond_mnemonic(op) ^ spc() ^ reg_name(rd) ^ sep() ^ reg_name(rs1) ^ sep() ^ reg_name(rs2)
function clause execute (ZICOND_RTYPE(rs2, rs1, rd, RISCV_CZERO_EQZ)) = {
let value = X(rs1);
let condition = X(rs2);
let result : xlenbits = if condition == zeros() then zeros()
else value;
X(rd) = result;
RETIRE_SUCCESS
}
function clause execute (ZICOND_RTYPE(rs2, rs1, rd, RISCV_CZERO_NEZ)) = {
let value = X(rs1);
let condition = X(rs2);
let result : xlenbits = if (condition != zeros()) then zeros()
else value;
X(rd) = result;
RETIRE_SUCCESS
}
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