56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
|
/*
|
||
|
|
* 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;
|
||
|
|
}
|