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/*
* PowerPC emulation micro-operations helpers for qemu.
*
* Copyright (c) 2003-2007 Jocelyn Mayer
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "op_mem_access.h"
void glue(do_lsw, MEMSUFFIX) (int dst)
{
uint32_t tmp;
int sh;
for (; T1 > 3; T1 -= 4, T0 += 4) {
env->gpr[dst++] = glue(ldu32, MEMSUFFIX)((uint32_t)T0);
if (unlikely(dst == 32))
dst = 0;
}
if (unlikely(T1 != 0)) {
tmp = 0;
for (sh = 24; T1 > 0; T1--, T0++, sh -= 8) {
tmp |= glue(ldu8, MEMSUFFIX)((uint32_t)T0) << sh;
}
env->gpr[dst] = tmp;
}
}
#if defined(TARGET_PPC64)
void glue(do_lsw_64, MEMSUFFIX) (int dst)
{
uint32_t tmp;
int sh;
for (; T1 > 3; T1 -= 4, T0 += 4) {
env->gpr[dst++] = glue(ldu32, MEMSUFFIX)((uint64_t)T0);
if (unlikely(dst == 32))
dst = 0;
}
if (unlikely(T1 != 0)) {
tmp = 0;
for (sh = 24; T1 > 0; T1--, T0++, sh -= 8) {
tmp |= glue(ldu8, MEMSUFFIX)((uint64_t)T0) << sh;
}
env->gpr[dst] = tmp;
}
}
#endif
void glue(do_stsw, MEMSUFFIX) (int src)
{
int sh;
for (; T1 > 3; T1 -= 4, T0 += 4) {
glue(st32, MEMSUFFIX)((uint32_t)T0, env->gpr[src++]);
if (unlikely(src == 32))
src = 0;
}
if (unlikely(T1 != 0)) {
for (sh = 24; T1 > 0; T1--, T0++, sh -= 8)
glue(st8, MEMSUFFIX)((uint32_t)T0, (env->gpr[src] >> sh) & 0xFF);
}
}
#if defined(TARGET_PPC64)
void glue(do_stsw_64, MEMSUFFIX) (int src)
{
int sh;
for (; T1 > 3; T1 -= 4, T0 += 4) {
glue(st32, MEMSUFFIX)((uint64_t)T0, env->gpr[src++]);
if (unlikely(src == 32))
src = 0;
}
if (unlikely(T1 != 0)) {
for (sh = 24; T1 > 0; T1--, T0++, sh -= 8)
glue(st8, MEMSUFFIX)((uint64_t)T0, (env->gpr[src] >> sh) & 0xFF);
}
}
#endif
/* PowerPC 601 specific instructions (POWER bridge) */
// XXX: to be tested
void glue(do_POWER_lscbx, MEMSUFFIX) (int dest, int ra, int rb)
{
int i, c, d, reg;
d = 24;
reg = dest;
for (i = 0; i < T1; i++) {
c = glue(ldu8, MEMSUFFIX)((uint32_t)T0++);
/* ra (if not 0) and rb are never modified */
if (likely(reg != rb && (ra == 0 || reg != ra))) {
env->gpr[reg] = (env->gpr[reg] & ~(0xFF << d)) | (c << d);
}
if (unlikely(c == T2))
break;
if (likely(d != 0)) {
d -= 8;
} else {
d = 24;
reg++;
reg = reg & 0x1F;
}
}
T0 = i;
}
#undef MEMSUFFIX
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