c45eff30cb
Fix identation problems, and try to use the same indentation strategy in the same file. Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn> Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn> Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Message-Id: <20230405085813.40643-3-liweiwei@iscas.ac.cn> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
110 lines
3 KiB
C
110 lines
3 KiB
C
/*
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* RISC-V Emulation Helpers for QEMU.
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*
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* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
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* Copyright (c) 2017-2018 SiFive, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2 or later, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "cpu.h"
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#include "qemu/main-loop.h"
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#include "exec/exec-all.h"
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#include "exec/helper-proto.h"
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target_ulong HELPER(divu_i128)(CPURISCVState *env,
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target_ulong ul, target_ulong uh,
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target_ulong vl, target_ulong vh)
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{
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target_ulong ql, qh;
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Int128 q;
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if (vl == 0 && vh == 0) { /* Handle special behavior on div by zero */
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ql = ~0x0;
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qh = ~0x0;
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} else {
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q = int128_divu(int128_make128(ul, uh), int128_make128(vl, vh));
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ql = int128_getlo(q);
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qh = int128_gethi(q);
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}
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env->retxh = qh;
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return ql;
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}
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target_ulong HELPER(remu_i128)(CPURISCVState *env,
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target_ulong ul, target_ulong uh,
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target_ulong vl, target_ulong vh)
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{
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target_ulong rl, rh;
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Int128 r;
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if (vl == 0 && vh == 0) {
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rl = ul;
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rh = uh;
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} else {
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r = int128_remu(int128_make128(ul, uh), int128_make128(vl, vh));
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rl = int128_getlo(r);
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rh = int128_gethi(r);
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}
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env->retxh = rh;
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return rl;
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}
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target_ulong HELPER(divs_i128)(CPURISCVState *env,
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target_ulong ul, target_ulong uh,
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target_ulong vl, target_ulong vh)
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{
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target_ulong qh, ql;
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Int128 q;
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if (vl == 0 && vh == 0) { /* Div by zero check */
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ql = ~0x0;
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qh = ~0x0;
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} else if (uh == (1ULL << (TARGET_LONG_BITS - 1)) && ul == 0 &&
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vh == ~0x0 && vl == ~0x0) {
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/* Signed div overflow check (-2**127 / -1) */
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ql = ul;
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qh = uh;
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} else {
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q = int128_divs(int128_make128(ul, uh), int128_make128(vl, vh));
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ql = int128_getlo(q);
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qh = int128_gethi(q);
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}
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env->retxh = qh;
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return ql;
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}
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target_ulong HELPER(rems_i128)(CPURISCVState *env,
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target_ulong ul, target_ulong uh,
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target_ulong vl, target_ulong vh)
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{
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target_ulong rh, rl;
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Int128 r;
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if (vl == 0 && vh == 0) {
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rl = ul;
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rh = uh;
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} else {
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r = int128_rems(int128_make128(ul, uh), int128_make128(vl, vh));
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rl = int128_getlo(r);
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rh = int128_gethi(r);
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}
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env->retxh = rh;
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return rl;
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}
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