8220e911c2
This patch adds support for decoding 2-src data processing insns,
and the first users, UDIV and SDIV.
Signed-off-by: Alexander Graf <agraf@suse.de>
[claudio: adapted to new decoder adding the 2-src decoding level,
always zero-extend result in 32bit mode]
Signed-off-by: Claudio Fontana <claudio.fontana@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* AArch64 specific helpers
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*
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* Copyright (c) 2013 Alexander Graf <agraf@suse.de>
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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 "exec/gdbstub.h"
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#include "helper.h"
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#include "qemu/host-utils.h"
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#include "sysemu/sysemu.h"
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#include "qemu/bitops.h"
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/* C2.4.7 Multiply and divide */
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/* special cases for 0 and LLONG_MIN are mandated by the standard */
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uint64_t HELPER(udiv64)(uint64_t num, uint64_t den)
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{
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if (den == 0) {
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return 0;
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}
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return num / den;
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}
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int64_t HELPER(sdiv64)(int64_t num, int64_t den)
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{
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if (den == 0) {
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return 0;
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}
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if (num == LLONG_MIN && den == -1) {
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return LLONG_MIN;
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}
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return num / den;
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}
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