mirror of https://gitee.com/openkylin/qemu.git
149 lines
3.3 KiB
C
149 lines
3.3 KiB
C
/*
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* Misc Sparc helpers
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*
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* Copyright (c) 2003-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h"
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#include "host-utils.h"
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#include "helper.h"
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#include "sysemu.h"
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void helper_raise_exception(CPUState *env, int tt)
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{
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env->exception_index = tt;
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cpu_loop_exit(env);
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}
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void helper_debug(CPUState *env)
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{
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env->exception_index = EXCP_DEBUG;
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cpu_loop_exit(env);
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}
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void helper_shutdown(void)
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{
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#if !defined(CONFIG_USER_ONLY)
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qemu_system_shutdown_request();
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#endif
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}
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#ifdef TARGET_SPARC64
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target_ulong helper_popc(target_ulong val)
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{
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return ctpop64(val);
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}
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void helper_tick_set_count(void *opaque, uint64_t count)
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{
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#if !defined(CONFIG_USER_ONLY)
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cpu_tick_set_count(opaque, count);
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#endif
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}
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uint64_t helper_tick_get_count(void *opaque)
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{
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#if !defined(CONFIG_USER_ONLY)
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return cpu_tick_get_count(opaque);
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#else
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return 0;
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#endif
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}
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void helper_tick_set_limit(void *opaque, uint64_t limit)
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{
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#if !defined(CONFIG_USER_ONLY)
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cpu_tick_set_limit(opaque, limit);
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#endif
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}
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#endif
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static target_ulong helper_udiv_common(CPUState *env, target_ulong a,
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target_ulong b, int cc)
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{
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int overflow = 0;
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uint64_t x0;
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uint32_t x1;
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x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
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x1 = (b & 0xffffffff);
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if (x1 == 0) {
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helper_raise_exception(env, TT_DIV_ZERO);
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}
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x0 = x0 / x1;
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if (x0 > 0xffffffff) {
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x0 = 0xffffffff;
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overflow = 1;
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}
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if (cc) {
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env->cc_dst = x0;
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env->cc_src2 = overflow;
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env->cc_op = CC_OP_DIV;
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}
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return x0;
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}
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target_ulong helper_udiv(CPUState *env, target_ulong a, target_ulong b)
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{
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return helper_udiv_common(env, a, b, 0);
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}
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target_ulong helper_udiv_cc(CPUState *env, target_ulong a, target_ulong b)
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{
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return helper_udiv_common(env, a, b, 1);
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}
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static target_ulong helper_sdiv_common(CPUState *env, target_ulong a,
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target_ulong b, int cc)
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{
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int overflow = 0;
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int64_t x0;
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int32_t x1;
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x0 = (a & 0xffffffff) | ((int64_t) (env->y) << 32);
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x1 = (b & 0xffffffff);
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if (x1 == 0) {
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helper_raise_exception(env, TT_DIV_ZERO);
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}
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x0 = x0 / x1;
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if ((int32_t) x0 != x0) {
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x0 = x0 < 0 ? 0x80000000 : 0x7fffffff;
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overflow = 1;
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}
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if (cc) {
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env->cc_dst = x0;
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env->cc_src2 = overflow;
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env->cc_op = CC_OP_DIV;
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}
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return x0;
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}
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target_ulong helper_sdiv(CPUState *env, target_ulong a, target_ulong b)
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{
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return helper_sdiv_common(env, a, b, 0);
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}
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target_ulong helper_sdiv_cc(CPUState *env, target_ulong a, target_ulong b)
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{
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return helper_sdiv_common(env, a, b, 1);
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}
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