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/*
* PowerPC CPU routines for qemu.
*
* Copyright (c) 2017 Nikunj A Dadhania, IBM Corporation.
*
* 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 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/>.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "cpu-models.h"
target_ulong cpu_read_xer(CPUPPCState *env)
{
if (is_isa300(env)) {
return env->xer | (env->so << XER_SO) |
(env->ov << XER_OV) | (env->ca << XER_CA) |
(env->ov32 << XER_OV32) | (env->ca32 << XER_CA32);
}
return env->xer | (env->so << XER_SO) | (env->ov << XER_OV) |
(env->ca << XER_CA);
}
void cpu_write_xer(CPUPPCState *env, target_ulong xer)
{
env->so = (xer >> XER_SO) & 1;
env->ov = (xer >> XER_OV) & 1;
env->ca = (xer >> XER_CA) & 1;
/* write all the flags, while reading back check of isa300 */
env->ov32 = (xer >> XER_OV32) & 1;
env->ca32 = (xer >> XER_CA32) & 1;
env->xer = xer & ~((1ul << XER_SO) |
(1ul << XER_OV) | (1ul << XER_CA) |
(1ul << XER_OV32) | (1ul << XER_CA32));
}
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