1 /* 2 * RISC-V Vector Crypto Extension Helpers for QEMU. 3 * 4 * Copyright (C) 2023 SiFive, Inc. 5 * Written by Codethink Ltd and SiFive. 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2 or later, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program. If not, see <http://www.gnu.org/licenses/>. 18 */ 19 20 #include "qemu/osdep.h" 21 #include "qemu/host-utils.h" 22 #include "qemu/bitops.h" 23 #include "cpu.h" 24 #include "exec/memop.h" 25 #include "exec/exec-all.h" 26 #include "exec/helper-proto.h" 27 #include "internals.h" 28 #include "vector_internals.h" 29 30 static uint64_t clmul64(uint64_t y, uint64_t x) 31 { 32 uint64_t result = 0; 33 for (int j = 63; j >= 0; j--) { 34 if ((y >> j) & 1) { 35 result ^= (x << j); 36 } 37 } 38 return result; 39 } 40 41 static uint64_t clmulh64(uint64_t y, uint64_t x) 42 { 43 uint64_t result = 0; 44 for (int j = 63; j >= 1; j--) { 45 if ((y >> j) & 1) { 46 result ^= (x >> (64 - j)); 47 } 48 } 49 return result; 50 } 51 52 RVVCALL(OPIVV2, vclmul_vv, OP_UUU_D, H8, H8, H8, clmul64) 53 GEN_VEXT_VV(vclmul_vv, 8) 54 RVVCALL(OPIVX2, vclmul_vx, OP_UUU_D, H8, H8, clmul64) 55 GEN_VEXT_VX(vclmul_vx, 8) 56 RVVCALL(OPIVV2, vclmulh_vv, OP_UUU_D, H8, H8, H8, clmulh64) 57 GEN_VEXT_VV(vclmulh_vv, 8) 58 RVVCALL(OPIVX2, vclmulh_vx, OP_UUU_D, H8, H8, clmulh64) 59 GEN_VEXT_VX(vclmulh_vx, 8) 60