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/*
* RISC-V Bitmanip Extension Helpers for QEMU.
*
* Copyright (c) 2020 Kito Cheng, kito.cheng@sifive.com
* Copyright (c) 2020 Frank Chang, frank.chang@sifive.com
* Copyright (c) 2021 Philipp Tomsich, philipp.tomsich@vrull.eu
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/host-utils.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
#include "tcg/tcg.h"
target_ulong HELPER(clmul)(target_ulong rs1, target_ulong rs2)
{
target_ulong result = 0;
for (int i = 0; i < TARGET_LONG_BITS; i++) {
if ((rs2 >> i) & 1) {
result ^= (rs1 << i);
}
}
return result;
}
target_ulong HELPER(clmulr)(target_ulong rs1, target_ulong rs2)
{
target_ulong result = 0;
for (int i = 0; i < TARGET_LONG_BITS; i++) {
if ((rs2 >> i) & 1) {
result ^= (rs1 >> (TARGET_LONG_BITS - i - 1));
}
}
return result;
}
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