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/*
* 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(CPUSPARCState *env, int tt)
{
env->exception_index = tt;
cpu_loop_exit(env);
}
void helper_debug(CPUSPARCState *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(CPUSPARCState *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(CPUSPARCState *env, target_ulong a, target_ulong b)
{
return helper_udiv_common(env, a, b, 0);
}
target_ulong helper_udiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
{
return helper_udiv_common(env, a, b, 1);
}
static target_ulong helper_sdiv_common(CPUSPARCState *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(CPUSPARCState *env, target_ulong a, target_ulong b)
{
return helper_sdiv_common(env, a, b, 0);
}
target_ulong helper_sdiv_cc(CPUSPARCState *env, target_ulong a, target_ulong b)
{
return helper_sdiv_common(env, a, b, 1);
}
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