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target-tilegx: Handle v1shl, v1shru, v1shrs

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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-08-24 08:56:45 -07:00
parent 3be19e8c83
commit 461aa6783e
4 changed files with 76 additions and 2 deletions
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55
target-tilegx/simd_helper.c Normal file
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/*
* QEMU TILE-Gx helpers
*
* Copyright (c) 2015 Chen Gang
*
* 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 2.1 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/lgpl-2.1.html>
*/
#include "cpu.h"
#include "qemu-common.h"
#include "exec/helper-proto.h"
uint64_t helper_v1shl(uint64_t a, uint64_t b)
{
uint64_t m;
b &= 7;
m = 0x0101010101010101ULL * (0xff >> b);
return (a & m) << b;
}
uint64_t helper_v1shru(uint64_t a, uint64_t b)
{
uint64_t m;
b &= 7;
m = 0x0101010101010101ULL * ((0xff << b) & 0xff);
return (a & m) >> b;
}
uint64_t helper_v1shrs(uint64_t a, uint64_t b)
{
uint64_t r = 0;
int i;
b &= 7;
for (i = 0; i < 64; i += 8) {
int64_t ae = (int8_t)(a >> i);
r |= ((ae >> b) & 0xff) << i;
}
return r;
}