56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/*
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* QEMU TILE-Gx helpers
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*
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* Copyright (c) 2015 Chen Gang
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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 2.1 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
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* <http://www.gnu.org/licenses/lgpl-2.1.html>
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*/
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#include "cpu.h"
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#include "qemu-common.h"
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#include "exec/helper-proto.h"
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uint64_t helper_v1shl(uint64_t a, uint64_t b)
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{
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uint64_t m;
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b &= 7;
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m = 0x0101010101010101ULL * (0xff >> b);
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return (a & m) << b;
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}
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uint64_t helper_v1shru(uint64_t a, uint64_t b)
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{
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uint64_t m;
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b &= 7;
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m = 0x0101010101010101ULL * ((0xff << b) & 0xff);
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return (a & m) >> b;
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}
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uint64_t helper_v1shrs(uint64_t a, uint64_t b)
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{
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uint64_t r = 0;
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int i;
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b &= 7;
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for (i = 0; i < 64; i += 8) {
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int64_t ae = (int8_t)(a >> i);
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r |= ((ae >> b) & 0xff) << i;
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}
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return r;
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}
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