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/*
* Helpers for HPPA instructions.
*
* Copyright (c) 2016 Richard Henderson <rth@twiddle.net>
*
* 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 "qemu/osdep.h"
#include "cpu.h"
#include "exec/exec-all.h"
#include "exec/helper-proto.h"
void QEMU_NORETURN HELPER(excp)(CPUHPPAState *env, int excp)
{
HPPACPU *cpu = hppa_env_get_cpu(env);
CPUState *cs = CPU(cpu);
cs->exception_index = excp;
cpu_loop_exit(cs);
}
static void QEMU_NORETURN dynexcp(CPUHPPAState *env, int excp, uintptr_t ra)
{
HPPACPU *cpu = hppa_env_get_cpu(env);
CPUState *cs = CPU(cpu);
cs->exception_index = excp;
cpu_loop_exit_restore(cs, ra);
}
void HELPER(tsv)(CPUHPPAState *env, target_ulong cond)
{
if (unlikely((target_long)cond < 0)) {
dynexcp(env, EXCP_SIGFPE, GETPC());
}
}
void HELPER(tcond)(CPUHPPAState *env, target_ulong cond)
{
if (unlikely(cond)) {
dynexcp(env, EXCP_SIGFPE, GETPC());
}
}
void HELPER(loaded_fr0)(CPUHPPAState *env)
{
uint32_t shadow = env->fr[0] >> 32;
int rm, d;
env->fr0_shadow = shadow;
switch (extract32(shadow, 9, 2)) {
default:
rm = float_round_nearest_even;
break;
case 1:
rm = float_round_to_zero;
break;
case 2:
rm = float_round_up;
break;
case 3:
rm = float_round_down;
break;
}
set_float_rounding_mode(rm, &env->fp_status);
d = extract32(shadow, 5, 1);
set_flush_to_zero(d, &env->fp_status);
set_flush_inputs_to_zero(d, &env->fp_status);
}
void cpu_hppa_loaded_fr0(CPUHPPAState *env)
{
helper_loaded_fr0(env);
}
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