| 1 | /* |
| 2 | * RISC-V translation routines for the Zicond Standard Extension. |
| 3 | * |
| 4 | * Copyright (c) 2020-2023 PLCT Lab |
| 5 | * Copyright (c) 2022 VRULL GmbH. |
| 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 | #define REQUIRE_ZICOND(ctx) do { \ |
| 21 | if (!ctx->cfg_ptr->ext_zicond) { \ |
| 22 | return false; \ |
| 23 | } \ |
| 24 | } while (0) |
| 25 | |
| 26 | /* Emits "$rd = ($rs2 <cond> $zero) ? $zero : $rs1" */ |
| 27 | static void gen_czero(TCGv dest, TCGv src1, TCGv src2, TCGCond cond) |
| 28 | { |
| 29 | TCGv zero = tcg_constant_tl(0); |
| 30 | tcg_gen_movcond_tl(cond, dest, src2, zero, zero, src1); |
| 31 | } |
| 32 | |
| 33 | static void gen_czero_eqz(TCGv dest, TCGv src1, TCGv src2) |
| 34 | { |
| 35 | gen_czero(dest, src1, src2, TCG_COND_EQ); |
| 36 | } |
| 37 | |
| 38 | static void gen_czero_nez(TCGv dest, TCGv src1, TCGv src2) |
| 39 | { |
| 40 | gen_czero(dest, src1, src2, TCG_COND_NE); |
| 41 | } |
| 42 | |
| 43 | static bool trans_czero_eqz(DisasContext *ctx, arg_r *a) |
| 44 | { |
| 45 | REQUIRE_ZICOND(ctx); |
| 46 | |
| 47 | return gen_logic(ctx, a, gen_czero_eqz); |
| 48 | } |
| 49 | |
| 50 | static bool trans_czero_nez(DisasContext *ctx, arg_r *a) |
| 51 | { |
| 52 | REQUIRE_ZICOND(ctx); |
| 53 | |
| 54 | return gen_logic(ctx, a, gen_czero_nez); |
| 55 | } |