9ecaa27e71
Fix incorrect overflow calculation. Move overflow exception check to a helper function, to eliminate inline branches. Remove some incorrect special casing of R0. Implement multiply inline. Reviewed-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Signed-off-by: Richard Henderson <rth@twiddle.net>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
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* OpenRISC exception helper routines
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*
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* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
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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 "qemu/osdep.h"
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#include "cpu.h"
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#include "exec/helper-proto.h"
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#include "exec/exec-all.h"
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#include "exception.h"
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void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
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{
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OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
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raise_exception(cpu, excp);
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}
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void HELPER(ove)(CPUOpenRISCState *env, target_ulong test)
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{
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if (unlikely(test) && (env->sr & SR_OVE)) {
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OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
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CPUState *cs = CPU(cpu);
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cs->exception_index = EXCP_RANGE;
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cpu_loop_exit_restore(cs, GETPC());
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}
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}
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