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