op.c
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/*
* ARM micro operations
*
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2005-2007 CodeSourcery, LLC
*
* 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 "exec.h"
void OPPROTO op_addl_T0_T1_cc(void)
{
unsigned int src1;
src1 = T0;
T0 += T1;
env->NZF = T0;
env->CF = T0 < src1;
env->VF = (src1 ^ T1 ^ -1) & (src1 ^ T0);
}
void OPPROTO op_adcl_T0_T1_cc(void)
{
unsigned int src1;
src1 = T0;
if (!env->CF) {
T0 += T1;
env->CF = T0 < src1;
} else {
T0 += T1 + 1;
env->CF = T0 <= src1;
}
env->VF = (src1 ^ T1 ^ -1) & (src1 ^ T0);
env->NZF = T0;
FORCE_RET();
}
#define OPSUB(sub, sbc, res, T0, T1) \
\
void OPPROTO op_ ## sub ## l_T0_T1_cc(void) \
{ \
unsigned int src1; \
src1 = T0; \
T0 -= T1; \
env->NZF = T0; \
env->CF = src1 >= T1; \
env->VF = (src1 ^ T1) & (src1 ^ T0); \
res = T0; \
} \
\
void OPPROTO op_ ## sbc ## l_T0_T1_cc(void) \
{ \
unsigned int src1; \
src1 = T0; \
if (!env->CF) { \
T0 = T0 - T1 - 1; \
env->CF = src1 > T1; \
} else { \
T0 = T0 - T1; \
env->CF = src1 >= T1; \
} \
env->VF = (src1 ^ T1) & (src1 ^ T0); \
env->NZF = T0; \
res = T0; \
FORCE_RET(); \
}
OPSUB(sub, sbc, T0, T0, T1)
OPSUB(rsb, rsc, T0, T1, T0)
/* memory access */
#define MEMSUFFIX _raw
#include "op_mem.h"
#if !defined(CONFIG_USER_ONLY)
#define MEMSUFFIX _user
#include "op_mem.h"
#define MEMSUFFIX _kernel
#include "op_mem.h"
#endif
void OPPROTO op_clrex(void)
{
cpu_lock();
helper_clrex(env);
cpu_unlock();
}
/* T1 based, use T0 as shift count */
void OPPROTO op_shll_T1_T0(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32)
T1 = 0;
else
T1 = T1 << shift;
FORCE_RET();
}
void OPPROTO op_shrl_T1_T0(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32)
T1 = 0;
else
T1 = (uint32_t)T1 >> shift;
FORCE_RET();
}
void OPPROTO op_sarl_T1_T0(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32)
shift = 31;
T1 = (int32_t)T1 >> shift;
}
void OPPROTO op_rorl_T1_T0(void)
{
int shift;
shift = T0 & 0x1f;
if (shift) {
T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
}
FORCE_RET();
}
/* T1 based, use T0 as shift count and compute CF */
void OPPROTO op_shll_T1_T0_cc(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32) {
if (shift == 32)
env->CF = T1 & 1;
else
env->CF = 0;
T1 = 0;
} else if (shift != 0) {
env->CF = (T1 >> (32 - shift)) & 1;
T1 = T1 << shift;
}
FORCE_RET();
}
void OPPROTO op_shrl_T1_T0_cc(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32) {
if (shift == 32)
env->CF = (T1 >> 31) & 1;
else
env->CF = 0;
T1 = 0;
} else if (shift != 0) {
env->CF = (T1 >> (shift - 1)) & 1;
T1 = (uint32_t)T1 >> shift;
}
FORCE_RET();
}
void OPPROTO op_sarl_T1_T0_cc(void)
{
int shift;
shift = T0 & 0xff;
if (shift >= 32) {
env->CF = (T1 >> 31) & 1;
T1 = (int32_t)T1 >> 31;
} else if (shift != 0) {
env->CF = (T1 >> (shift - 1)) & 1;
T1 = (int32_t)T1 >> shift;
}
FORCE_RET();
}
void OPPROTO op_rorl_T1_T0_cc(void)
{
int shift1, shift;
shift1 = T0 & 0xff;
shift = shift1 & 0x1f;
if (shift == 0) {
if (shift1 != 0)
env->CF = (T1 >> 31) & 1;
} else {
env->CF = (T1 >> (shift - 1)) & 1;
T1 = ((uint32_t)T1 >> shift) | (T1 << (32 - shift));
}
FORCE_RET();
}
void OPPROTO op_movl_cp_T0(void)
{
helper_set_cp(env, PARAM1, T0);
FORCE_RET();
}
void OPPROTO op_movl_T0_cp(void)
{
T0 = helper_get_cp(env, PARAM1);
FORCE_RET();
}
void OPPROTO op_movl_cp15_T0(void)
{
helper_set_cp15(env, PARAM1, T0);
FORCE_RET();
}
void OPPROTO op_movl_T0_cp15(void)
{
T0 = helper_get_cp15(env, PARAM1);
FORCE_RET();
}
void OPPROTO op_v7m_mrs_T0(void)
{
T0 = helper_v7m_mrs(env, PARAM1);
}
void OPPROTO op_v7m_msr_T0(void)
{
helper_v7m_msr(env, PARAM1, T0);
}
void OPPROTO op_movl_T0_sp(void)
{
if (PARAM1 == env->v7m.current_sp)
T0 = env->regs[13];
else
T0 = env->v7m.other_sp;
FORCE_RET();
}
#include "op_neon.h"
/* iwMMXt support */
#include "op_iwmmxt.c"